How we blow our polythene.
The manufacture of polythene materials requires blowing a bubble of molten material, followed by the cooling and folding of the material. The material is then cut and sealed into bags of one form or another in another process. This is a highly technical process and can involve large amounts of scrap during the setup materials during both processes. Whilst we strive to aim for exact dimensions during all our manufacturing processes we need to work within some strict manufacturing tolerances. Below are details of our standard tolerances used on all manufactured products.
If you require us to work within different tolerances for a specific product, please contact us and we will be happy to discuss this.
Please note that we will normally manufacture bags using a standard bottom weld. This will usually be discussed at the time of ordering although if you specifically require a side weld please state this on your order.
Plus or minus 3mm (0.125″) or 3%, whichever is greater. If you need a minimum width, please discuss with us.
Plus or minus 6mm (0.25″) or 3%, whichever is greater. Please note that all measurements are cut to cut and will therefore include a bottom skirt of about 8mm on end weld bags (apart from grip seal bags where length is measured from the grip seal to the bottom of the bag).
We work to +/- 10% of the gauge.
With regards to manufactured quantity, our standard tolerance will be +/- 10% of the quantity ordered. However with small quantity orders and certain bespoke products we may need to work up to +/- 25%.