Ask ten people what a poly bag is and you will get ten answers — the truth is simple: a poly bag is just a plastic bag, short for polyethylene. At QIS these are our clear, food-grade LDPE flat bags: no seal, no handle, just a smooth open-top bag you fill and close however you like. They come in dozens of sizes and four thicknesses.
Which thickness (gauge) do you need?
The number in microns (µm) tells you how thick, and therefore how tough, the bag is. As a rule of thumb, the sharper or heavier the contents, the higher the gauge you want:
- 35µm — light items: produce, garments, giftware
- 50µm — the everyday all-rounder for most goods
- 75µm — heavier or slightly sharp contents
- 100µm and over — heavy duty, for hardware, parts and awkward edges
Shop poly bags by size & gauge
Sizes are width x height and every bag is sold by the box. Here is a cross-section of the range.
100 x 180mm — 35µm
100 x 150mm — 50µm
125 x 205mm — 35µm
125 x 205mm — 100µm HD
150 x 230mm — 50µm
150 x 230mm — 100µm HD
205 x 305mm — 50µm
205 x 305mm — 75µm
205 x 305mm — 100µm HD
230 x 330mm — 35µm
Sealing & related products
Close the open top with a heat sealer for a tamper-resistant finish, or use packing tape for everyday jobs. Need a continuous length? Try layflat LDPE tubing and cut your own. Lining a box or bin? See carton liners. Posting the packed bag? Drop it into a courier bag. For the full plastic bag range, visit our plastic bags hub.
