* Many of our poly bags are suitable for food use, however there may be exceptions and if you specifically require this then it is best to get specific confirmation of this.

 

Order Code	Size (Inches)	Size (mm)	Pack Quantity
04L01	3 x 14	75 x 350	1000
04L25	3 x 18	150 x 450	1000
04L02	4 x 6	100 x 150	1000
04L03	6 x 8	150 x 200	1000
04L05	6 x 15	150 x 375	1000
04L06	7 x 9	175 x 225	1000
04L07	8 x 10	200 x 250	1000
04L08	8 x 12	200 x 300	1000
04L09	9 x 12	225 x 300	1000
04L11	10 x 12	250 x 300	1000
04L12	10 x 15	250 x 375	1000
04L13	12 x 15	300 x 375	1000
04L14	12 x 18	300 x 450	1000
04L15	12 x 24	300 x 600	1000
04L16	14 x 18	350 x 450	1000
04L24	14 x 24	350 x 600	1000
04L17	15 x 20	375 x 500	1000
04L18	18 x 24	450 x 600	500
04L19	20 x 30	500 x 750	500
04L21	24 x 24	600 x 600	500
04L22	24 x 30	600 x 760	500
04L23	24 x 36	600 x 900	500
04L96	8 x 12 x 22	200 x 300 x 560	1000

 

 

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Lightweight Polythene Bags (100g / 25 micron) — Quick Overview

Lightweight polythene bags in the 100g (25 micron) range are a practical choice when you need a clear, flexible bag for everyday packing, portioning, and protection from dust and light moisture. This thickness is commonly described as “lightweight” because it balances easy opening and handling with enough strength for many non-sharp items. The products in this collection are supplied in bulk pack quantities, making them suitable for routine use where consistency of size and film thickness matters.

These bags are often used as inner packaging to keep items grouped, clean, and easy to identify. They can also be used as a simple barrier layer inside cartons, trays, or outer mailing packs. As with any plastic packaging, suitability depends on the specific application (item weight, shape, temperature, and whether the contents have sharp edges).

Polythene Bags Lightweight & 100g (25mu) — Helpful Guide

This collection focuses on lightweight, clear polythene bags (100g / 25 micron). Below is a practical guide to the bag types and sizes shown on this page, how they’re typically used, and how to choose the right size for your product.

Type: Lightweight flat polythene bags (100g / 25 micron)

Flat polythene bags are simple, versatile bags without side gussets. They’re commonly used for portioning, protecting, and organising items. The lightweight film makes them easy to open and quick to pack, especially for high-throughput environments.

• 04L01 (3 x 14) — A long, narrow format often chosen for slim items that need length more than width (for example, long components, narrow bakery items, or grouped parts). The extended length can help with folding over or tying.
• 04L25 (3 x 18) — Similar narrow width with extra length for longer products or where you want more film to fold over for closure. Useful when the contents vary slightly in length.
• 04L02 (4 x 6) — A compact general-purpose size for small items, samples, fixings, and small portions. Often used where neat presentation and quick identification are important.
• 04L03 (6 x 8) — A popular mid-size option for slightly bulkier items, small food portions, or grouped components. Provides a bit more room for easy loading without excessive spare film.
• 04L05 (6 x 15) — A longer mid-width bag for items that are narrow but tall/long. The extra length can be helpful for folding over, heat sealing, or accommodating products with variable height.
• 04L06 (7 x 9) — A slightly wider mid-size bag that can suit items needing a little more width for easy insertion, while still keeping the pack compact.
• 04L07 (8 x 10) — A versatile size for general packing and protection. Often chosen when you want a straightforward bag that loads easily and gives a tidy finish.

Note on internal links: The product codes and sizes above are taken from the items listed on this category page. Use the table on this page to confirm the exact size in inches and millimetres and the pack quantity for each order code.

Understanding 100g / 25 micron film (what it means in practice)

Film thickness is one of the biggest drivers of performance. At around 25 micron, the film is typically flexible and easy to handle, which helps speed up packing. It’s commonly used for light-duty protection and portioning, but it is not designed for heavy loads or sharp-edged products. If your items are heavy, have corners, or are likely to puncture the film, a thicker grade is usually more appropriate.

Because “food suitability” can depend on the exact specification and intended use, it’s sensible to confirm suitability if you specifically require food-contact use. Temperature, fat/oil content, and the way the bag is sealed or stored can all affect what is appropriate for your process.

Case study: Reducing packing time for small parts and portions

A small operation packing mixed small items (for example, components, samples, or portioned goods) often faces two recurring issues: slow packing due to bags that are hard to open, and inconsistent pack appearance due to oversized bags. Switching to a lightweight 25 micron bag in a closer-fitting size can improve workflow because the film opens easily and the bag holds its shape well enough for quick loading.

In practice, the improvement usually comes from standardising a small set of sizes (for example, one compact size for small items and one mid-size for bulkier items) and training staff to leave a consistent headspace for closure. The result is typically faster packing, fewer re-bags, and more consistent storage in bins or cartons.

How to choose the correct lightweight polythene bag

1) Choose the right width first

Bag width is the most common cause of fit problems. Measure the widest point of your product (or the bundle) and add clearance so the item slides in without stretching the film. If you’re packing multiple items together, measure the combined width at the widest point.

2) Then choose the length (allow for closure)

Length should cover the product height/length plus extra film for your chosen closure method. If you plan to fold over, tie, tape, or heat seal, allow additional headspace. Longer bags (such as narrow-long formats) can be useful when you need extra film to fold over without increasing width.

3) Consider the product’s shape and edges

Lightweight film is ideal for smooth, non-sharp items. If your product has corners, burrs, or sharp edges, consider either a thicker bag or adding a protective inner wrap. Even small sharp points can cause pinholes during handling or transit.

4) Think about handling conditions

How the bag is used matters as much as what goes inside it. If bags are opened and filled quickly, lightweight film can be a benefit. If bags are dragged across rough surfaces, stacked under weight, or handled in cold conditions where some films can feel stiffer, you may need to test a sample size and thickness.

5) Match pack quantity to your workflow

Bulk pack quantities can reduce changeovers and keep packing stations stocked. If you have multiple packing points, consider standardising on a few sizes so replenishment is simpler and you avoid running out of a niche size mid-shift.

Practical tips for better results

• Prevent overfilling: Overfilling increases stress on seams and makes closure harder. A small amount of headspace improves consistency.
• Keep sizes consistent: Standardising sizes helps with storage, labelling, and carton packing.
• Use a clean, dry packing area: Dust and moisture can make lightweight film harder to separate and open.
• Test with your real product: A quick trial with the actual item (including any inserts or labels) is the best way to confirm fit and handling.

Storage, compliance, and food-contact considerations

Store polythene bags in a clean, dry area away from direct sunlight and excessive heat to help maintain film performance. If you require bags for food-contact use, confirm suitability for your specific application (including temperature range and the type of food). Requirements can vary depending on how the packaging is used and the regulatory framework that applies to your business.

Questions & Answers