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Stretch Wrap – Safety, Stability & Sustainability

In recent years, the race to zero micron has accelerated with stretch wrap cost reduction becoming a greater driver than pallet stability for many users. The once old reliable, sturdy, 23 micron is almost a thing of the past as film providers push down gauged thinner films and the latest fads in a bid to gain competitive edge over their rivals. In a lot of these cases the film is sold solely on tonnage cost and yield with little or no consideration given to load holding. This has led to some very expensive accidents as well as a number of depots, multiples and end users now rejecting unsafe looking loads. The primary reason for wrapping a pallet is ensuring the goods reach their destination safely and in good condition. Sadly, this is now an afterthought in a lot of circumstances.

Improving Stability Standards

The EUMOS 40509 directive listed in the European Road Worthiness Package outlines the acceptable levels of permanent and reversible load deformations during load transportation. To achieve a stable stretch wrapped pallet, three things must be harmonised, the load itself, the wrapper settings and the stretch wrap properties.

As enforcement of EU directives takes effect across all sectors of the end of line packaging process, unsafe loads will be tackled which will then add greater incentive to the quality of stretch wrap being used and how it is being applied. This will drive greater development in quality stretch wrap films which will aid pallet stability & reduce the focus on simply reducing micron of the film in use. This re-education of both buyer and supplier will also weed out some poor quality stretch wrap films which are simply not fit for purpose in a large number of cases.

Optimize Your Pallet

Here, at NPP we offer bespoke Sustainability Wrap Audits for our customers which include optimising the correct film in conjunction with the load as well as the machine. Our primary focus is on ensuring the load is delivered in a safe manner. We assess every customer and every machine individually. We have a number of films in our repertoire which can tackle any given scenario. During assessment, we often find we can dramatically reduce customers’ environmental impact without compromising load stability.

To arrange your Sustainability Wrap Audit, please contact our technical team at sales@npp.ie or call us at 01 880 92 99.

Click here for more information on our unique high-efficiency stretch film – Fiber Film.

Stretch Wrap – Safety, Stability & Sustainability

In recent years, the race to zero micron has accelerated with stretch wrap cost reduction becoming a greater driver than pallet stability for many users. The once old reliable, sturdy, 23 micron is almost a thing of the past as film providers push down gauged thinner films and the latest fads in a bid to gain competitive edge over their rivals. In a lot of these cases the film is sold solely on tonnage cost and yield with little or no consideration given to load holding. This has led to some very expensive accidents as well as a number of depots, multiples and end users now rejecting unsafe looking loads. The primary reason for wrapping a pallet is ensuring the goods reach their destination safely and in good condition. Sadly, this is now an afterthought in a lot of circumstances.

Improving Stability Standards

The EUMOS 40509 directive listed in the European Road Worthiness Package outlines the acceptable levels of permanent and reversible load deformations during load transportation. To achieve a stable stretch wrapped pallet, three things must be harmonised, the load itself, the wrapper settings and the stretch wrap properties.

As enforcement of EU directives takes effect across all sectors of the end of line packaging process, unsafe loads will be tackled which will then add greater incentive to the quality of stretch wrap being used and how it is being applied. This will drive greater development in quality stretch wrap films which will aid pallet stability & reduce the focus on simply reducing micron of the film in use. This re-education of both buyer and supplier will also weed out some poor quality stretch wrap films which are simply not fit for purpose in a large number of cases.

Optimize Your Pallet

Here, at NPP we offer bespoke Sustainability Wrap Audits for our customers which include optimising the correct film in conjunction with the load as well as the machine. Our primary focus is on ensuring the load is delivered in a safe manner. We assess every customer and every machine individually. We have a number of films in our repertoire which can tackle any given scenario. During assessment, we often find we can dramatically reduce customers’ environmental impact without compromising load stability.

To arrange your Sustainability Wrap Audit, please contact our technical team at sales@npp.ie or call us at 01 880 92 99.

Click here for more information on our unique high-efficiency stretch film – Fiber Film.

Types of Extrusion

Stretch film can be manufactured using two manufacturing techniques – the blown and the cast extrusion methods. 

The Blown Method

A blown extruder basically takes the polythene granules from the mixing hoppers, screws them along a heated tube which melts the granules changing them from solid to molten during their passage so that the blend ends up at approximately 200 degrees centigrade. The molten mass is forced through a circular die to emerge as a very thin tube of polythene. This tube is hauled upwards and away from the extruder through driven rollers at the same time as air is introduced into the tube causing it to expand. The amount of air in the tube determines its diameter and hence the final width of the film whilst the speed with which it is hauled away from the extruder determines the film’s final thickness.

The collapsed tube of polythene leaving the nip rollers is led away over various tensioning rollers to be wound up into reels. When sheet film is required, the edges of the collapsed tube are removed to leave two sheets running together. These are then separated and further slit into the final required width.

The Cast Method

In the cast process the extrusion process is exactly the same as for the blown process. The difference is in the machine die and the method of cooling the film.

Here the molten polythene is forced through a die that terminates in a horizontal slot – so forming a single thickness of sheet rather than a tube.

The sheet leaves the die and is “cast” immediately on to a roller having a highly polished surface and which is maintained at a low temperature by being cooled internally with chilled water.  This means the film can be cooled very rapidly and evenly to produce sheet that is both optically clear and thickness controlled within fine limits.

The sheet of film is drawn away from the die at a rate that determines its final thickness. The width of the sheet is determined by the length of the slot in the die. This cannot be adjusted.

After passing over various tensioning rollers the sheet is trimmed at the edges and then slit into a number of narrower widths before being wound onto cores.

Both blown and cast films can be manufactured as either mono-extruded or co-extruded types.

Mono-Extrusion Method

In mono-extrusion, the die of the machine is fed with molten polythene from a single extruder only. This material may be one grade of polythene or a mixture of grades. The whole of the thickness of the polythene film produced therefore comprises this grade or mixture.

Co-Extrusion Method

In co-extrusion, a complex die is fed with materials from more than one extruder, each of which can contain a different grade or mixture of grades of polythene.

The flow of materials from each extruder are only united just before they leave the die and cool. Film produced from this process is therefore composed of a number of layers joined at their faces. This process is used to manufacture films having layers with different characteristics.

The multi-layer production process allows manufacturer more flexibility to place different ingredients where they are needed most.  It also enables a more controlled spread of all the ingredients, thus making a stronger film.

Stretch Wrap – Safety, Stability & Sustainability

In recent years, the race to zero micron has accelerated with stretch wrap cost reduction becoming a greater driver than pallet stability for many users. The once old reliable, sturdy, 23 micron is almost a thing of the past as film providers push down gauged thinner films and the latest fads in a bid to gain competitive edge over their rivals. In a lot of these cases the film is sold solely on tonnage cost and yield with little or no consideration given to load holding. This has led to some very expensive accidents as well as a number of depots, multiples and end users now rejecting unsafe looking loads. The primary reason for wrapping a pallet is ensuring the goods reach their destination safely and in good condition. Sadly, this is now an afterthought in a lot of circumstances.

Improving Stability Standards

The EUMOS 40509 directive listed in the European Road Worthiness Package outlines the acceptable levels of permanent and reversible load deformations during load transportation. To achieve a stable stretch wrapped pallet, three things must be harmonised, the load itself, the wrapper settings and the stretch wrap properties.

As enforcement of EU directives takes effect across all sectors of the end of line packaging process, unsafe loads will be tackled which will then add greater incentive to the quality of stretch wrap being used and how it is being applied. This will drive greater development in quality stretch wrap films which will aid pallet stability & reduce the focus on simply reducing micron of the film in use. This re-education of both buyer and supplier will also weed out some poor quality stretch wrap films which are simply not fit for purpose in a large number of cases.

Optimize Your Pallet

Here, at NPP we offer bespoke Sustainability Wrap Audits for our customers which include optimising the correct film in conjunction with the load as well as the machine. Our primary focus is on ensuring the load is delivered in a safe manner. We assess every customer and every machine individually. We have a number of films in our repertoire which can tackle any given scenario. During assessment, we often find we can dramatically reduce customers’ environmental impact without compromising load stability.

To arrange your Sustainability Wrap Audit, please contact our technical team at sales@npp.ie or call us at 01 880 92 99.

Click here for more information on our unique high-efficiency stretch film – Fiber Film.

Types of Extrusion

Stretch film can be manufactured using two manufacturing techniques – the blown and the cast extrusion methods. 

The Blown Method

A blown extruder basically takes the polythene granules from the mixing hoppers, screws them along a heated tube which melts the granules changing them from solid to molten during their passage so that the blend ends up at approximately 200 degrees centigrade. The molten mass is forced through a circular die to emerge as a very thin tube of polythene. This tube is hauled upwards and away from the extruder through driven rollers at the same time as air is introduced into the tube causing it to expand. The amount of air in the tube determines its diameter and hence the final width of the film whilst the speed with which it is hauled away from the extruder determines the film’s final thickness.

The collapsed tube of polythene leaving the nip rollers is led away over various tensioning rollers to be wound up into reels. When sheet film is required, the edges of the collapsed tube are removed to leave two sheets running together. These are then separated and further slit into the final required width.

The Cast Method

In the cast process the extrusion process is exactly the same as for the blown process. The difference is in the machine die and the method of cooling the film.

Here the molten polythene is forced through a die that terminates in a horizontal slot – so forming a single thickness of sheet rather than a tube.

The sheet leaves the die and is “cast” immediately on to a roller having a highly polished surface and which is maintained at a low temperature by being cooled internally with chilled water.  This means the film can be cooled very rapidly and evenly to produce sheet that is both optically clear and thickness controlled within fine limits.

The sheet of film is drawn away from the die at a rate that determines its final thickness. The width of the sheet is determined by the length of the slot in the die. This cannot be adjusted.

After passing over various tensioning rollers the sheet is trimmed at the edges and then slit into a number of narrower widths before being wound onto cores.

Both blown and cast films can be manufactured as either mono-extruded or co-extruded types.

Mono-Extrusion Method

In mono-extrusion, the die of the machine is fed with molten polythene from a single extruder only. This material may be one grade of polythene or a mixture of grades. The whole of the thickness of the polythene film produced therefore comprises this grade or mixture.

Co-Extrusion Method

In co-extrusion, a complex die is fed with materials from more than one extruder, each of which can contain a different grade or mixture of grades of polythene.

The flow of materials from each extruder are only united just before they leave the die and cool. Film produced from this process is therefore composed of a number of layers joined at their faces. This process is used to manufacture films having layers with different characteristics.

The multi-layer production process allows manufacturer more flexibility to place different ingredients where they are needed most.  It also enables a more controlled spread of all the ingredients, thus making a stronger film.

Stretch Wrap Optimisation

If you are in a business which ships a lot of pallets then stretch wrap is an area of expense. However it is also an area where huge savings can be made. In order to make these savings, one simple question must be answered. Is my stretch wrap optimised? 

Cost reduction is only one of the benefits when you optimise your stretch wrap. It can also help reduce the amount of material used which will have a positive impact on the environment and your corporate responsibility goals.

NPP offer Sustainability Audits to identify efficiencies and cost savings potential. Professional analysis can help guide you through the different options of pre-stretched, power pre-stretch or SMART wrap to find the right material for you by analysing your pallet profiles, weights and wrapping machines.

Contact our team today to learn more about the savings you can make.

Stretch Wrap – Safety, Stability & Sustainability

In recent years, the race to zero micron has accelerated with stretch wrap cost reduction becoming a greater driver than pallet stability for many users. The once old reliable, sturdy, 23 micron is almost a thing of the past as film providers push down gauged thinner films and the latest fads in a bid to gain competitive edge over their rivals. In a lot of these cases the film is sold solely on tonnage cost and yield with little or no consideration given to load holding. This has led to some very expensive accidents as well as a number of depots, multiples and end users now rejecting unsafe looking loads. The primary reason for wrapping a pallet is ensuring the goods reach their destination safely and in good condition. Sadly, this is now an afterthought in a lot of circumstances.

Improving Stability Standards

The EUMOS 40509 directive listed in the European Road Worthiness Package outlines the acceptable levels of permanent and reversible load deformations during load transportation. To achieve a stable stretch wrapped pallet, three things must be harmonised, the load itself, the wrapper settings and the stretch wrap properties.

As enforcement of EU directives takes effect across all sectors of the end of line packaging process, unsafe loads will be tackled which will then add greater incentive to the quality of stretch wrap being used and how it is being applied. This will drive greater development in quality stretch wrap films which will aid pallet stability & reduce the focus on simply reducing micron of the film in use. This re-education of both buyer and supplier will also weed out some poor quality stretch wrap films which are simply not fit for purpose in a large number of cases.

Optimize Your Pallet

Here, at NPP we offer bespoke Sustainability Wrap Audits for our customers which include optimising the correct film in conjunction with the load as well as the machine. Our primary focus is on ensuring the load is delivered in a safe manner. We assess every customer and every machine individually. We have a number of films in our repertoire which can tackle any given scenario. During assessment, we often find we can dramatically reduce customers’ environmental impact without compromising load stability.

To arrange your Sustainability Wrap Audit, please contact our technical team at sales@npp.ie or call us at 01 880 92 99.

Click here for more information on our unique high-efficiency stretch film – Fiber Film.

Types of Extrusion

Stretch film can be manufactured using two manufacturing techniques – the blown and the cast extrusion methods. 

The Blown Method

A blown extruder basically takes the polythene granules from the mixing hoppers, screws them along a heated tube which melts the granules changing them from solid to molten during their passage so that the blend ends up at approximately 200 degrees centigrade. The molten mass is forced through a circular die to emerge as a very thin tube of polythene. This tube is hauled upwards and away from the extruder through driven rollers at the same time as air is introduced into the tube causing it to expand. The amount of air in the tube determines its diameter and hence the final width of the film whilst the speed with which it is hauled away from the extruder determines the film’s final thickness.

The collapsed tube of polythene leaving the nip rollers is led away over various tensioning rollers to be wound up into reels. When sheet film is required, the edges of the collapsed tube are removed to leave two sheets running together. These are then separated and further slit into the final required width.

The Cast Method

In the cast process the extrusion process is exactly the same as for the blown process. The difference is in the machine die and the method of cooling the film.

Here the molten polythene is forced through a die that terminates in a horizontal slot – so forming a single thickness of sheet rather than a tube.

The sheet leaves the die and is “cast” immediately on to a roller having a highly polished surface and which is maintained at a low temperature by being cooled internally with chilled water.  This means the film can be cooled very rapidly and evenly to produce sheet that is both optically clear and thickness controlled within fine limits.

The sheet of film is drawn away from the die at a rate that determines its final thickness. The width of the sheet is determined by the length of the slot in the die. This cannot be adjusted.

After passing over various tensioning rollers the sheet is trimmed at the edges and then slit into a number of narrower widths before being wound onto cores.

Both blown and cast films can be manufactured as either mono-extruded or co-extruded types.

Mono-Extrusion Method

In mono-extrusion, the die of the machine is fed with molten polythene from a single extruder only. This material may be one grade of polythene or a mixture of grades. The whole of the thickness of the polythene film produced therefore comprises this grade or mixture.

Co-Extrusion Method

In co-extrusion, a complex die is fed with materials from more than one extruder, each of which can contain a different grade or mixture of grades of polythene.

The flow of materials from each extruder are only united just before they leave the die and cool. Film produced from this process is therefore composed of a number of layers joined at their faces. This process is used to manufacture films having layers with different characteristics.

The multi-layer production process allows manufacturer more flexibility to place different ingredients where they are needed most.  It also enables a more controlled spread of all the ingredients, thus making a stronger film.

Stretch Wrap Optimisation

If you are in a business which ships a lot of pallets then stretch wrap is an area of expense. However it is also an area where huge savings can be made. In order to make these savings, one simple question must be answered. Is my stretch wrap optimised? 

Cost reduction is only one of the benefits when you optimise your stretch wrap. It can also help reduce the amount of material used which will have a positive impact on the environment and your corporate responsibility goals.

NPP offer Sustainability Audits to identify efficiencies and cost savings potential. Professional analysis can help guide you through the different options of pre-stretched, power pre-stretch or SMART wrap to find the right material for you by analysing your pallet profiles, weights and wrapping machines.

Contact our team today to learn more about the savings you can make.

Why Choose Stretchfilms?

Stretchfilm is a highly versatile packaging solution used throughout a broad range of industries to wrap, secure and protect goods both in storage and in transit. 

Efficient and cost effective

Compared to other forms of packaging such as strapping or gluing, stretch wrapping is often the most efficient mothed of keeping multiple packaging together. Thanks to its light weight and recyclability, stretchfilm is more environmentally friendly than other forms of packaging. Plus, on a cost per load basis, stretch wrapping remains one of the most cost-effective ways to wrap and secure loads.

Elastic and Clingy

Stretchfilm has two important characteristics – elasticity and cling. Elasticity is the ability of the material to recover its shape when distorted. Most of the distortion force applied to an elastic material will be recovered as load holding force and so stretch film work as a load holding material by being stretched (distorted) as it is wrapped around a unit’s load.

Another feature is the cling – the tendency of the stretch film to adhere to itself. Cling is engineered into the film by the addition of special additives or the use of specific polymers and works together with the film’s elasticity to keep palletized contents together.

Optimising packaging operations

Often, loads are subjected to severe vibration in transportation. Thanks to its ‘elastic’ properties stretchfilm can withstand these forces and keep loads together to ensure the product reaches its destination intact and damage free. Stretch wrapping is an excellent way to help control labour costs especially where automatic equipment is used. Being 100% recyclable, pallet stretchfilm helps the organisation to minimize waste and conform with the Packaging Waste Regulations.

Contact us now for more information.

Stretch Wrap – Safety, Stability & Sustainability

In recent years, the race to zero micron has accelerated with stretch wrap cost reduction becoming a greater driver than pallet stability for many users. The once old reliable, sturdy, 23 micron is almost a thing of the past as film providers push down gauged thinner films and the latest fads in a bid to gain competitive edge over their rivals. In a lot of these cases the film is sold solely on tonnage cost and yield with little or no consideration given to load holding. This has led to some very expensive accidents as well as a number of depots, multiples and end users now rejecting unsafe looking loads. The primary reason for wrapping a pallet is ensuring the goods reach their destination safely and in good condition. Sadly, this is now an afterthought in a lot of circumstances.

Improving Stability Standards

The EUMOS 40509 directive listed in the European Road Worthiness Package outlines the acceptable levels of permanent and reversible load deformations during load transportation. To achieve a stable stretch wrapped pallet, three things must be harmonised, the load itself, the wrapper settings and the stretch wrap properties.

As enforcement of EU directives takes effect across all sectors of the end of line packaging process, unsafe loads will be tackled which will then add greater incentive to the quality of stretch wrap being used and how it is being applied. This will drive greater development in quality stretch wrap films which will aid pallet stability & reduce the focus on simply reducing micron of the film in use. This re-education of both buyer and supplier will also weed out some poor quality stretch wrap films which are simply not fit for purpose in a large number of cases.

Optimize Your Pallet

Here, at NPP we offer bespoke Sustainability Wrap Audits for our customers which include optimising the correct film in conjunction with the load as well as the machine. Our primary focus is on ensuring the load is delivered in a safe manner. We assess every customer and every machine individually. We have a number of films in our repertoire which can tackle any given scenario. During assessment, we often find we can dramatically reduce customers’ environmental impact without compromising load stability.

To arrange your Sustainability Wrap Audit, please contact our technical team at sales@npp.ie or call us at 01 880 92 99.

Click here for more information on our unique high-efficiency stretch film – Fiber Film.

Types of Extrusion

Stretch film can be manufactured using two manufacturing techniques – the blown and the cast extrusion methods. 

The Blown Method

A blown extruder basically takes the polythene granules from the mixing hoppers, screws them along a heated tube which melts the granules changing them from solid to molten during their passage so that the blend ends up at approximately 200 degrees centigrade. The molten mass is forced through a circular die to emerge as a very thin tube of polythene. This tube is hauled upwards and away from the extruder through driven rollers at the same time as air is introduced into the tube causing it to expand. The amount of air in the tube determines its diameter and hence the final width of the film whilst the speed with which it is hauled away from the extruder determines the film’s final thickness.

The collapsed tube of polythene leaving the nip rollers is led away over various tensioning rollers to be wound up into reels. When sheet film is required, the edges of the collapsed tube are removed to leave two sheets running together. These are then separated and further slit into the final required width.

The Cast Method

In the cast process the extrusion process is exactly the same as for the blown process. The difference is in the machine die and the method of cooling the film.

Here the molten polythene is forced through a die that terminates in a horizontal slot – so forming a single thickness of sheet rather than a tube.

The sheet leaves the die and is “cast” immediately on to a roller having a highly polished surface and which is maintained at a low temperature by being cooled internally with chilled water.  This means the film can be cooled very rapidly and evenly to produce sheet that is both optically clear and thickness controlled within fine limits.

The sheet of film is drawn away from the die at a rate that determines its final thickness. The width of the sheet is determined by the length of the slot in the die. This cannot be adjusted.

After passing over various tensioning rollers the sheet is trimmed at the edges and then slit into a number of narrower widths before being wound onto cores.

Both blown and cast films can be manufactured as either mono-extruded or co-extruded types.

Mono-Extrusion Method

In mono-extrusion, the die of the machine is fed with molten polythene from a single extruder only. This material may be one grade of polythene or a mixture of grades. The whole of the thickness of the polythene film produced therefore comprises this grade or mixture.

Co-Extrusion Method

In co-extrusion, a complex die is fed with materials from more than one extruder, each of which can contain a different grade or mixture of grades of polythene.

The flow of materials from each extruder are only united just before they leave the die and cool. Film produced from this process is therefore composed of a number of layers joined at their faces. This process is used to manufacture films having layers with different characteristics.

The multi-layer production process allows manufacturer more flexibility to place different ingredients where they are needed most.  It also enables a more controlled spread of all the ingredients, thus making a stronger film.

Stretch Wrap Optimisation

If you are in a business which ships a lot of pallets then stretch wrap is an area of expense. However it is also an area where huge savings can be made. In order to make these savings, one simple question must be answered. Is my stretch wrap optimised? 

Cost reduction is only one of the benefits when you optimise your stretch wrap. It can also help reduce the amount of material used which will have a positive impact on the environment and your corporate responsibility goals.

NPP offer Sustainability Audits to identify efficiencies and cost savings potential. Professional analysis can help guide you through the different options of pre-stretched, power pre-stretch or SMART wrap to find the right material for you by analysing your pallet profiles, weights and wrapping machines.

Contact our team today to learn more about the savings you can make.

Why Choose Stretchfilms?

Stretchfilm is a highly versatile packaging solution used throughout a broad range of industries to wrap, secure and protect goods both in storage and in transit. 

Efficient and cost effective

Compared to other forms of packaging such as strapping or gluing, stretch wrapping is often the most efficient mothed of keeping multiple packaging together. Thanks to its light weight and recyclability, stretchfilm is more environmentally friendly than other forms of packaging. Plus, on a cost per load basis, stretch wrapping remains one of the most cost-effective ways to wrap and secure loads.

Elastic and Clingy

Stretchfilm has two important characteristics – elasticity and cling. Elasticity is the ability of the material to recover its shape when distorted. Most of the distortion force applied to an elastic material will be recovered as load holding force and so stretch film work as a load holding material by being stretched (distorted) as it is wrapped around a unit’s load.

Another feature is the cling – the tendency of the stretch film to adhere to itself. Cling is engineered into the film by the addition of special additives or the use of specific polymers and works together with the film’s elasticity to keep palletized contents together.

Optimising packaging operations

Often, loads are subjected to severe vibration in transportation. Thanks to its ‘elastic’ properties stretchfilm can withstand these forces and keep loads together to ensure the product reaches its destination intact and damage free. Stretch wrapping is an excellent way to help control labour costs especially where automatic equipment is used. Being 100% recyclable, pallet stretchfilm helps the organisation to minimize waste and conform with the Packaging Waste Regulations.

Contact us now for more information.

Stretch Film – Methods of Application

Manual

This technique is used where volumes are low or where wrapping activities are dispersed around a site. The stretch film applied is controlled by the operator dispensing the film from a lightweight hand roll.

Core Brake Machines

Here the rotating loads pulls the film off a braked roll of film so that the stretch occurs between the load and the roll. As the film is not supported during the stretching process, necking-in occurs at high levels of stretch and lay-on forces can become great enough to cause crushing of all but the most robust products. To avoid both these risks stretch levels have to be kept low and are rarely higher than 20-30%.

Simple Pre-Stretch Machines

On these machines the rotating load pulls the film through a pair of free-running rollers geared together so that the roller nearer the load rotates at a faster rate than that nearer the unwinding roll of film. The stretch therefore takes places between these two rollers and little necking-in occurs. However, high lay-on forces can still build and so on of the rollers is equipped with a clutch device that allows slippage to take place. In practice this allows the film to retract somewhat to avoid load crushing. Stretch levels of up to 50-60% can be achieved on these machines.

Powered Pre-Stretch Machines

On these systems the two pre-stretch rollers are driven by external power and not by the rotating load. The film is this pulled from the roll and fed to the load. Lay-on forces can thus be carefully controlled by the speed with which the film is fed to the load. Load stability is further enhanced by the film’s high re-stretch resistance achieved from high levels of stretch – up to 300%.

View our range of Stretch film here or speak to one of our team today about your stretch film needs.

Stretch Wrap – Safety, Stability & Sustainability

In recent years, the race to zero micron has accelerated with stretch wrap cost reduction becoming a greater driver than pallet stability for many users. The once old reliable, sturdy, 23 micron is almost a thing of the past as film providers push down gauged thinner films and the latest fads in a bid to gain competitive edge over their rivals. In a lot of these cases the film is sold solely on tonnage cost and yield with little or no consideration given to load holding. This has led to some very expensive accidents as well as a number of depots, multiples and end users now rejecting unsafe looking loads. The primary reason for wrapping a pallet is ensuring the goods reach their destination safely and in good condition. Sadly, this is now an afterthought in a lot of circumstances.

Improving Stability Standards

The EUMOS 40509 directive listed in the European Road Worthiness Package outlines the acceptable levels of permanent and reversible load deformations during load transportation. To achieve a stable stretch wrapped pallet, three things must be harmonised, the load itself, the wrapper settings and the stretch wrap properties.

As enforcement of EU directives takes effect across all sectors of the end of line packaging process, unsafe loads will be tackled which will then add greater incentive to the quality of stretch wrap being used and how it is being applied. This will drive greater development in quality stretch wrap films which will aid pallet stability & reduce the focus on simply reducing micron of the film in use. This re-education of both buyer and supplier will also weed out some poor quality stretch wrap films which are simply not fit for purpose in a large number of cases.

Optimize Your Pallet

Here, at NPP we offer bespoke Sustainability Wrap Audits for our customers which include optimising the correct film in conjunction with the load as well as the machine. Our primary focus is on ensuring the load is delivered in a safe manner. We assess every customer and every machine individually. We have a number of films in our repertoire which can tackle any given scenario. During assessment, we often find we can dramatically reduce customers’ environmental impact without compromising load stability.

To arrange your Sustainability Wrap Audit, please contact our technical team at sales@npp.ie or call us at 01 880 92 99.

Click here for more information on our unique high-efficiency stretch film – Fiber Film.

Types of Extrusion

Stretch film can be manufactured using two manufacturing techniques – the blown and the cast extrusion methods. 

The Blown Method

A blown extruder basically takes the polythene granules from the mixing hoppers, screws them along a heated tube which melts the granules changing them from solid to molten during their passage so that the blend ends up at approximately 200 degrees centigrade. The molten mass is forced through a circular die to emerge as a very thin tube of polythene. This tube is hauled upwards and away from the extruder through driven rollers at the same time as air is introduced into the tube causing it to expand. The amount of air in the tube determines its diameter and hence the final width of the film whilst the speed with which it is hauled away from the extruder determines the film’s final thickness.

The collapsed tube of polythene leaving the nip rollers is led away over various tensioning rollers to be wound up into reels. When sheet film is required, the edges of the collapsed tube are removed to leave two sheets running together. These are then separated and further slit into the final required width.

The Cast Method

In the cast process the extrusion process is exactly the same as for the blown process. The difference is in the machine die and the method of cooling the film.

Here the molten polythene is forced through a die that terminates in a horizontal slot – so forming a single thickness of sheet rather than a tube.

The sheet leaves the die and is “cast” immediately on to a roller having a highly polished surface and which is maintained at a low temperature by being cooled internally with chilled water.  This means the film can be cooled very rapidly and evenly to produce sheet that is both optically clear and thickness controlled within fine limits.

The sheet of film is drawn away from the die at a rate that determines its final thickness. The width of the sheet is determined by the length of the slot in the die. This cannot be adjusted.

After passing over various tensioning rollers the sheet is trimmed at the edges and then slit into a number of narrower widths before being wound onto cores.

Both blown and cast films can be manufactured as either mono-extruded or co-extruded types.

Mono-Extrusion Method

In mono-extrusion, the die of the machine is fed with molten polythene from a single extruder only. This material may be one grade of polythene or a mixture of grades. The whole of the thickness of the polythene film produced therefore comprises this grade or mixture.

Co-Extrusion Method

In co-extrusion, a complex die is fed with materials from more than one extruder, each of which can contain a different grade or mixture of grades of polythene.

The flow of materials from each extruder are only united just before they leave the die and cool. Film produced from this process is therefore composed of a number of layers joined at their faces. This process is used to manufacture films having layers with different characteristics.

The multi-layer production process allows manufacturer more flexibility to place different ingredients where they are needed most.  It also enables a more controlled spread of all the ingredients, thus making a stronger film.

Stretch Wrap Optimisation

If you are in a business which ships a lot of pallets then stretch wrap is an area of expense. However it is also an area where huge savings can be made. In order to make these savings, one simple question must be answered. Is my stretch wrap optimised? 

Cost reduction is only one of the benefits when you optimise your stretch wrap. It can also help reduce the amount of material used which will have a positive impact on the environment and your corporate responsibility goals.

NPP offer Sustainability Audits to identify efficiencies and cost savings potential. Professional analysis can help guide you through the different options of pre-stretched, power pre-stretch or SMART wrap to find the right material for you by analysing your pallet profiles, weights and wrapping machines.

Contact our team today to learn more about the savings you can make.

Why Choose Stretchfilms?

Stretchfilm is a highly versatile packaging solution used throughout a broad range of industries to wrap, secure and protect goods both in storage and in transit. 

Efficient and cost effective

Compared to other forms of packaging such as strapping or gluing, stretch wrapping is often the most efficient mothed of keeping multiple packaging together. Thanks to its light weight and recyclability, stretchfilm is more environmentally friendly than other forms of packaging. Plus, on a cost per load basis, stretch wrapping remains one of the most cost-effective ways to wrap and secure loads.

Elastic and Clingy

Stretchfilm has two important characteristics – elasticity and cling. Elasticity is the ability of the material to recover its shape when distorted. Most of the distortion force applied to an elastic material will be recovered as load holding force and so stretch film work as a load holding material by being stretched (distorted) as it is wrapped around a unit’s load.

Another feature is the cling – the tendency of the stretch film to adhere to itself. Cling is engineered into the film by the addition of special additives or the use of specific polymers and works together with the film’s elasticity to keep palletized contents together.

Optimising packaging operations

Often, loads are subjected to severe vibration in transportation. Thanks to its ‘elastic’ properties stretchfilm can withstand these forces and keep loads together to ensure the product reaches its destination intact and damage free. Stretch wrapping is an excellent way to help control labour costs especially where automatic equipment is used. Being 100% recyclable, pallet stretchfilm helps the organisation to minimize waste and conform with the Packaging Waste Regulations.

Contact us now for more information.

Stretch Film – Methods of Application

Manual

This technique is used where volumes are low or where wrapping activities are dispersed around a site. The stretch film applied is controlled by the operator dispensing the film from a lightweight hand roll.

Core Brake Machines

Here the rotating loads pulls the film off a braked roll of film so that the stretch occurs between the load and the roll. As the film is not supported during the stretching process, necking-in occurs at high levels of stretch and lay-on forces can become great enough to cause crushing of all but the most robust products. To avoid both these risks stretch levels have to be kept low and are rarely higher than 20-30%.

Simple Pre-Stretch Machines

On these machines the rotating load pulls the film through a pair of free-running rollers geared together so that the roller nearer the load rotates at a faster rate than that nearer the unwinding roll of film. The stretch therefore takes places between these two rollers and little necking-in occurs. However, high lay-on forces can still build and so on of the rollers is equipped with a clutch device that allows slippage to take place. In practice this allows the film to retract somewhat to avoid load crushing. Stretch levels of up to 50-60% can be achieved on these machines.

Powered Pre-Stretch Machines

On these systems the two pre-stretch rollers are driven by external power and not by the rotating load. The film is this pulled from the roll and fed to the load. Lay-on forces can thus be carefully controlled by the speed with which the film is fed to the load. Load stability is further enhanced by the film’s high re-stretch resistance achieved from high levels of stretch – up to 300%.

View our range of Stretch film here or speak to one of our team today about your stretch film needs.

Stretch Film – Cast vs. Blown

Stretch films from both production methods are available in a variety of grades which perform equally well on all types of stretch machinery and through many types of stretch mechanisms. However, there are a few areas where cast and blown films are not totally interchangeable.

Occasionally there is a specific requirement that determines the choice of stretch film. Otherwise the choice is determined by the customers or manufacturers preference. The customer may be happier with the look or feel of a particular type or just be reluctant to change. The supplier may prefer to sell the type that is most readily available. Although both cast and blown films are generally interchangeable, there are some specific difference between them:

Features Cast Blown
Clarity The rapid cooling of the cast process gives a very clear film. This can be important for scanning labels or bar codes. Blown film is cooled slowly giving a film with slightly lighter haze or see through than cast film.
Stickiness Cast film relies on its smooth surface and resin type to achieve cling. Added tackifier or the co-extrusion tack in blown film makes it very sticky on one surface.
Noise Cast film is quiet in use. The tackifier in conventional blown film makes it noisy when unwinding. Low noise blown films are also available.
Telescoping Cast film cannot telescope. NPP’s blown film has a specially formulated tack layer to prevent telescoping.
Thickness Thickness variation can be controlled to smaller tolerances on cast film, typically +/- 10% spot to spot. Typical spot-to-spot thickness variation is +/- 20%.

 

View our range of Stretch wrap here or speak to one of our team today about your stretch wrap needs.

Stretch Wrap – Safety, Stability & Sustainability

In recent years, the race to zero micron has accelerated with stretch wrap cost reduction becoming a greater driver than pallet stability for many users. The once old reliable, sturdy, 23 micron is almost a thing of the past as film providers push down gauged thinner films and the latest fads in a bid to gain competitive edge over their rivals. In a lot of these cases the film is sold solely on tonnage cost and yield with little or no consideration given to load holding. This has led to some very expensive accidents as well as a number of depots, multiples and end users now rejecting unsafe looking loads. The primary reason for wrapping a pallet is ensuring the goods reach their destination safely and in good condition. Sadly, this is now an afterthought in a lot of circumstances.

Improving Stability Standards

The EUMOS 40509 directive listed in the European Road Worthiness Package outlines the acceptable levels of permanent and reversible load deformations during load transportation. To achieve a stable stretch wrapped pallet, three things must be harmonised, the load itself, the wrapper settings and the stretch wrap properties.

As enforcement of EU directives takes effect across all sectors of the end of line packaging process, unsafe loads will be tackled which will then add greater incentive to the quality of stretch wrap being used and how it is being applied. This will drive greater development in quality stretch wrap films which will aid pallet stability & reduce the focus on simply reducing micron of the film in use. This re-education of both buyer and supplier will also weed out some poor quality stretch wrap films which are simply not fit for purpose in a large number of cases.

Optimize Your Pallet

Here, at NPP we offer bespoke Sustainability Wrap Audits for our customers which include optimising the correct film in conjunction with the load as well as the machine. Our primary focus is on ensuring the load is delivered in a safe manner. We assess every customer and every machine individually. We have a number of films in our repertoire which can tackle any given scenario. During assessment, we often find we can dramatically reduce customers’ environmental impact without compromising load stability.

To arrange your Sustainability Wrap Audit, please contact our technical team at sales@npp.ie or call us at 01 880 92 99.

Click here for more information on our unique high-efficiency stretch film – Fiber Film.

Types of Extrusion

Stretch film can be manufactured using two manufacturing techniques – the blown and the cast extrusion methods. 

The Blown Method

A blown extruder basically takes the polythene granules from the mixing hoppers, screws them along a heated tube which melts the granules changing them from solid to molten during their passage so that the blend ends up at approximately 200 degrees centigrade. The molten mass is forced through a circular die to emerge as a very thin tube of polythene. This tube is hauled upwards and away from the extruder through driven rollers at the same time as air is introduced into the tube causing it to expand. The amount of air in the tube determines its diameter and hence the final width of the film whilst the speed with which it is hauled away from the extruder determines the film’s final thickness.

The collapsed tube of polythene leaving the nip rollers is led away over various tensioning rollers to be wound up into reels. When sheet film is required, the edges of the collapsed tube are removed to leave two sheets running together. These are then separated and further slit into the final required width.

The Cast Method

In the cast process the extrusion process is exactly the same as for the blown process. The difference is in the machine die and the method of cooling the film.

Here the molten polythene is forced through a die that terminates in a horizontal slot – so forming a single thickness of sheet rather than a tube.

The sheet leaves the die and is “cast” immediately on to a roller having a highly polished surface and which is maintained at a low temperature by being cooled internally with chilled water.  This means the film can be cooled very rapidly and evenly to produce sheet that is both optically clear and thickness controlled within fine limits.

The sheet of film is drawn away from the die at a rate that determines its final thickness. The width of the sheet is determined by the length of the slot in the die. This cannot be adjusted.

After passing over various tensioning rollers the sheet is trimmed at the edges and then slit into a number of narrower widths before being wound onto cores.

Both blown and cast films can be manufactured as either mono-extruded or co-extruded types.

Mono-Extrusion Method

In mono-extrusion, the die of the machine is fed with molten polythene from a single extruder only. This material may be one grade of polythene or a mixture of grades. The whole of the thickness of the polythene film produced therefore comprises this grade or mixture.

Co-Extrusion Method

In co-extrusion, a complex die is fed with materials from more than one extruder, each of which can contain a different grade or mixture of grades of polythene.

The flow of materials from each extruder are only united just before they leave the die and cool. Film produced from this process is therefore composed of a number of layers joined at their faces. This process is used to manufacture films having layers with different characteristics.

The multi-layer production process allows manufacturer more flexibility to place different ingredients where they are needed most.  It also enables a more controlled spread of all the ingredients, thus making a stronger film.

Stretch Wrap Optimisation

If you are in a business which ships a lot of pallets then stretch wrap is an area of expense. However it is also an area where huge savings can be made. In order to make these savings, one simple question must be answered. Is my stretch wrap optimised? 

Cost reduction is only one of the benefits when you optimise your stretch wrap. It can also help reduce the amount of material used which will have a positive impact on the environment and your corporate responsibility goals.

NPP offer Sustainability Audits to identify efficiencies and cost savings potential. Professional analysis can help guide you through the different options of pre-stretched, power pre-stretch or SMART wrap to find the right material for you by analysing your pallet profiles, weights and wrapping machines.

Contact our team today to learn more about the savings you can make.

Why Choose Stretchfilms?

Stretchfilm is a highly versatile packaging solution used throughout a broad range of industries to wrap, secure and protect goods both in storage and in transit. 

Efficient and cost effective

Compared to other forms of packaging such as strapping or gluing, stretch wrapping is often the most efficient mothed of keeping multiple packaging together. Thanks to its light weight and recyclability, stretchfilm is more environmentally friendly than other forms of packaging. Plus, on a cost per load basis, stretch wrapping remains one of the most cost-effective ways to wrap and secure loads.

Elastic and Clingy

Stretchfilm has two important characteristics – elasticity and cling. Elasticity is the ability of the material to recover its shape when distorted. Most of the distortion force applied to an elastic material will be recovered as load holding force and so stretch film work as a load holding material by being stretched (distorted) as it is wrapped around a unit’s load.

Another feature is the cling – the tendency of the stretch film to adhere to itself. Cling is engineered into the film by the addition of special additives or the use of specific polymers and works together with the film’s elasticity to keep palletized contents together.

Optimising packaging operations

Often, loads are subjected to severe vibration in transportation. Thanks to its ‘elastic’ properties stretchfilm can withstand these forces and keep loads together to ensure the product reaches its destination intact and damage free. Stretch wrapping is an excellent way to help control labour costs especially where automatic equipment is used. Being 100% recyclable, pallet stretchfilm helps the organisation to minimize waste and conform with the Packaging Waste Regulations.

Contact us now for more information.

Stretch Film – Methods of Application

Manual

This technique is used where volumes are low or where wrapping activities are dispersed around a site. The stretch film applied is controlled by the operator dispensing the film from a lightweight hand roll.

Core Brake Machines

Here the rotating loads pulls the film off a braked roll of film so that the stretch occurs between the load and the roll. As the film is not supported during the stretching process, necking-in occurs at high levels of stretch and lay-on forces can become great enough to cause crushing of all but the most robust products. To avoid both these risks stretch levels have to be kept low and are rarely higher than 20-30%.

Simple Pre-Stretch Machines

On these machines the rotating load pulls the film through a pair of free-running rollers geared together so that the roller nearer the load rotates at a faster rate than that nearer the unwinding roll of film. The stretch therefore takes places between these two rollers and little necking-in occurs. However, high lay-on forces can still build and so on of the rollers is equipped with a clutch device that allows slippage to take place. In practice this allows the film to retract somewhat to avoid load crushing. Stretch levels of up to 50-60% can be achieved on these machines.

Powered Pre-Stretch Machines

On these systems the two pre-stretch rollers are driven by external power and not by the rotating load. The film is this pulled from the roll and fed to the load. Lay-on forces can thus be carefully controlled by the speed with which the film is fed to the load. Load stability is further enhanced by the film’s high re-stretch resistance achieved from high levels of stretch – up to 300%.

View our range of Stretch film here or speak to one of our team today about your stretch film needs.

Stretch Film – Cast vs. Blown

Stretch films from both production methods are available in a variety of grades which perform equally well on all types of stretch machinery and through many types of stretch mechanisms. However, there are a few areas where cast and blown films are not totally interchangeable.

Occasionally there is a specific requirement that determines the choice of stretch film. Otherwise the choice is determined by the customers or manufacturers preference. The customer may be happier with the look or feel of a particular type or just be reluctant to change. The supplier may prefer to sell the type that is most readily available. Although both cast and blown films are generally interchangeable, there are some specific difference between them:

Features Cast Blown
Clarity The rapid cooling of the cast process gives a very clear film. This can be important for scanning labels or bar codes. Blown film is cooled slowly giving a film with slightly lighter haze or see through than cast film.
Stickiness Cast film relies on its smooth surface and resin type to achieve cling. Added tackifier or the co-extrusion tack in blown film makes it very sticky on one surface.
Noise Cast film is quiet in use. The tackifier in conventional blown film makes it noisy when unwinding. Low noise blown films are also available.
Telescoping Cast film cannot telescope. NPP’s blown film has a specially formulated tack layer to prevent telescoping.
Thickness Thickness variation can be controlled to smaller tolerances on cast film, typically +/- 10% spot to spot. Typical spot-to-spot thickness variation is +/- 20%.

 

View our range of Stretch wrap here or speak to one of our team today about your stretch wrap needs.

NPP’s Guide to Stretchwrap

Top Ten Tips

Drawing on its many years’ experience NPP Group Ltd has compiled the following top ten tips checklist to help achieve the perfectly wrapped pallet. In addition to the following tips it is essential that correct stretch wrap is used and applied in the right way to ensure the production of a wrapped pallet which will cope with the rigours of the modern supply chain. 

  1. Choose a grade of film that is compatible with the stretching process.
  2. Choose a thickness that is sensible for the weight of the product being wrapped.
  3. Consider the stability of the load and select a film overlap that will cope best with this.
  4. Remember that additional turns of film around the top of the load will enhance the stability.
  5. Consider the journey length and the maximum number of fork-truck movements the load will undergo to determine the most sensible total of turns.
  6. Always ensure that there are at least two turns around the load AND the pallet base to prevent the load sliding off under extremes of braking, cornering etc.
  7. Ensure that the film is applied so that the sticky side is presented to the load. This will prevent loads sticking together.
  8. Because the film has a ‘memory’, check 12 hours after wrapping to ensure that the optimum tension has been used.
  9. When the optimum wrap has been achieved record all the details of the stretch, tension, overlap, wrap weight, load-holding force etc. to ensure no changes are made to the wrap over the course of time.
  10. Always use stretch film from a reputable supplier like NPP where quality and consistency can be proved through process, procedure and test records.

View our range of Stretch wrap here or speak to one of our team today about your stretch wrap needs.