Custom-Length Poly Packaging Without Fixed Bag Sizes

Why stock multiple bag lengths when the products you're packing keep changing size? Surepak Layflat Tubing gives manufacturers, warehouses, workshops & dispatch teams continuous clear poly tubing that can be cut to the required length, then heat sealed to create custom-size bags or protective sleeves.

This heat-sealable poly tubing is particularly useful for long components, irregular products, manufactured parts & variable-length stock. With numerous widths plus film gauges available across the Surepak range, buyers can select the tubing around product dimensions, handling conditions & protection requirements rather than forcing every item into a standard bag.

For products needing cushioning inside the outer packaging, Surepak Protective Foams provides another layer of surface protection. The wider Adhesives & Tapes range supports complementary sealing plus packing requirements.

What Are Layflat Tubing?

Layflat tubing is continuous polyethylene tubing supplied flattened onto a roll.

Instead of receiving hundreds of bags at one predetermined length, the packer cuts the tube where required. The material can then be heat sealed to create a custom-length bag or sleeve around a suitable product.

Think of it as choosing two dimensions at different stages:

Width is selected when you buy the roll.

Length is selected when you pack the product.

That distinction makes continuous poly tubing especially useful where product lengths change regularly.

Surepak's range contains numerous width, gauge plus roll-length combinations. Representative products include:

FCT5050
50mm x 1085m
50µm
5kg roll

FCT60100
60mm x 542m
100µm
6kg roll

FCT15050
150mm x 1085m
50µm
15kg roll

FCT225150
225mm x 362m
150µm
22.5kg roll

FCT1000150
1000mm x 100m
150µm
27.7kg roll

These examples demonstrate the breadth of the range rather than representing every available configuration.

Buyers may also know this packaging as layflat poly tubing, clear poly tubing, polyethylene tubing, continuous plastic tubing, poly sleeving or plastic tubing rolls.

Why Choose Layflat Tubing?

Fixed bags solve a fixed-size problem.

Continuous tubing solves a variable-length problem.

Imagine a fabrication business packing components that are consistently narrow but leave production at 300mm, 650mm, 900mm plus 1.4m long. Stocking a separate finished bag for every length quickly becomes inefficient.

One correctly selected layflat tube can accommodate those different lengths.

Custom bag length: cut material around the product rather than choosing from predetermined bag lengths.

Heat-sealable construction: create enclosed bags or sleeves where the packaging process requires it.

Multiple widths: accommodate narrow components through to substantially larger products.

Multiple gauges: match film thickness to suitable handling plus protection requirements.

Clear material: identify contents without immediately opening the package.

Storage protection: help shield suitable products from dust, dirt plus moisture.

Reduced bag-size complexity: one width can service multiple product lengths.

The important limitation is width. Once the roll arrives, you can change the cut length but you can't make the tube wider.

Common Applications

Long Components, Rods & Extrusions

Long products expose the biggest advantage of continuous tubing.

A component may fit comfortably inside a 150mm-wide sleeve but require a different bag length every time.

Suitable applications can include:

► Rods
► Tubes
► Extrusions
► Handles
► Manufactured components
► Hardware
► Replacement parts
► Long assemblies
► Workshop components

Cut enough material for the product plus the intended closure. Matching the cut length exactly to the component can leave insufficient material for a reliable heat seal.

Where delicate surfaces need protection from rubbing inside the package, protective foam can be introduced before the outer sleeve is completed.

Manufacturing & Production Lines

Here's where SKU reduction can become commercially useful.

A manufacturer producing several lengths of the same component may be able to standardise around one suitable tube width rather than carrying a separate bag size for every finished length.

The packing process becomes:

Measure → Cut → Seal → Load → Close.

That simplicity can be useful around repetitive production work, particularly where clear packaging also allows finished parts to remain identifiable.

A dedicated packing position can improve the process further. Workstations & Workbenches provides a relevant pathway for businesses establishing cutting, sealing plus packing stations.

Irregular Products

Length isn't always the difficult measurement.

Handles, brackets, fittings plus projections can make an apparently narrow product require substantially wider tubing.

Before choosing a roll, measure the largest relevant cross-section of the item.

For irregular products:

► Identify the widest point
► Include depth in the fit calculation
► Allow practical loading clearance
► Check projections
► Protect sharp edges
► Consider the finished seal

Don't force an item into tubing simply because its nominal width looks correct on paper.

Custom-Length Protective Bags

One roll can effectively become many different bag lengths.

For example, a workshop could cut shorter bags for individual components plus longer sleeves for assemblies from the same tubing width, provided the products fit correctly plus require an appropriate film gauge.

This makes custom-length plastic bags one of the strongest applications for layflat tubing.

Heat sealing one end creates the starting bag format. After loading, the other end can be sealed where complete enclosure is required.

The sealing equipment needs to accommodate the width plus film being processed.

Warehouse Storage

Dust protection doesn't always require a carton.

Clear poly tubing can help cover suitable components during storage while leaving the contents visible for identification.

That can be useful for:

► Spare components
► Manufactured parts
► Workshop stock
► Long products
► Assemblies
► Maintenance spares

Packaging still needs to suit the item. Heavy, fragile or sharp products may require additional protection.

Tools Storage & Organization can support the surrounding warehouse or workshop system where packaged stock also needs structured storage.

Air Ducting Applications

Layflat tubing also has applications beyond conventional bag making.

Surepak identifies air ducting as a use for its lay flat tube.

Selection for this type of job needs more than a packaging calculation. Width, gauge, required length, airflow conditions plus equipment requirements should all be considered.

Don't assume every polyethylene tube is suitable for every ventilation setup simply because it physically fits the outlet.

Transport & Dispatch Preparation

Clear poly sleeving can provide a useful outer layer around suitable parts moving from manufacturing into storage or dispatch.

For vulnerable equipment, however, containment isn't the same as cushioning.

If a component could be scratched, knocked or damaged during handling, consider the protective layers surrounding it rather than relying on plastic film alone.

Specialty Carry Cases can provide a reusable alternative for suitable tools, instruments plus components.

Once packed products need to move through the warehouse, Material Handling Equipment supports the next part of the workflow.

Product Selection Guide

Choose The Width

Width is the first filter because it can't be changed after purchase.

Measure the product's largest relevant cross-section rather than simply its most obvious face.

For a flat component, nominal width may be enough to begin the calculation.

For a three-dimensional product, both width plus depth influence how much flattened tubing is required to enclose it.

Allow practical loading clearance as well.

A tube that technically fits but requires the operator to force every product inside is probably undersized for efficient packing.

Choose The Film Gauge

Micron measurement describes film thickness.

Surepak's broader layflat range includes multiple gauges, with verified products across 50µm, 75µm, 100µm plus 150µm configurations.

Those gauges shouldn't be interpreted as meaning every width is available in every thickness.

Instead, select from the combinations available for the required tube size.

Thicker doesn't automatically mean better.

Over-specifying film can increase material use without fixing problems caused by sharp edges, unsuitable handling or poor outer packaging.

Check Roll Length

Film gauge, tube width plus roll configuration influence the amount of linear material supplied.

A thinner film can provide substantially more linear metres in an otherwise comparable roll configuration.

That means purchasing decisions shouldn't be based purely on the price of one roll.

For repetitive packing, consider:

Roll cost ÷ useful bags produced = more meaningful purchasing comparison.

Waste from incorrect widths, excessive cut lengths plus unnecessary gauge can change that calculation quickly.

Check Heat-Sealing Requirements

A continuous tube becomes a custom bag when the closure is created.

A typical workflow can involve:

► Cutting the required length
► Sealing one end
► Loading the item
► Sealing the remaining end where required

Check that the sealing equipment can accommodate the tube width plus material configuration.

A sealer suitable for narrow component bags may not be practical for very wide industrial tubing.

Decide Whether Tubing Is Enough Protection

Layflat tubing provides containment plus surface protection from suitable environmental exposure.

It doesn't automatically provide:

► Impact cushioning
► Load restraint
► Crush protection
► Protection from sharp internal edges
► Structural transport packaging

If those risks exist, build the package around them rather than expecting thicker polyethylene to solve every problem.

Expert Tips

Measure the product before choosing the roll. Width is fixed once you've purchased the tubing.

Remember depth. A three-dimensional object consumes more tube circumference than its face width suggests.

Leave enough material for sealing. Don't cut the tubing exactly to finished product length.

Protect sharp edges first. A bracket or machined corner can puncture heavy film just as easily as lighter film if pressure concentrates on one point.

Run a packing trial before ordering heavily. Test product fit, loading clearance, seal quality plus finished package handling.

Label gauges at the workstation. Similar-looking rolls can have very different film thicknesses.

Keep cut lengths under control. A few unnecessary centimetres multiplied across thousands of packages becomes substantial material waste.

Match the sealer to the job. Tubing width plus gauge need to suit the equipment producing the seal.

Don't confuse heat sealing with heat shrinking. Layflat tubing can be heat sealed without being shrink film.

For workshops reviewing how consumables fit into everyday equipment care, How To Clean Your Gear Without Ruining It provides practical maintenance guidance.