Production Standard Tolerances

The Information below details our Production Standards. Should you like a printed copy or PDF document please click on the image on the right.

1. Production Standard:

A. Purpose:
i) To provide a basis for agreement between purchaser and supplier
ii) To provide information for the guidance of the producers, distributors and users

B. Scope:
This standard covers dimensional and thickness tolerances, using the relevant PIFA Standards as a guideline, for the following products manufactured from Low Density Polythene, printed and unprinted, natural and pigmented

i) Layflat Tubing, Gusseted Layflat Tubing, Centre-Fold Sheet, Single Wound Sheet and J-Fold Sheet
ii) Bottom Weld Bags including Heavy Duty Sacks
iii) Side Weld Bags, excluding Skirt Side Weld

C. Tolerances
i) Film Thickness
Parameters: All film within a range of 25-250 microns

The average thickness shall be within +/- 10% of the nominal and be the mean of 10 individual measurements taken at random over the circumference of the tubing

Tolerances for intermediate thickness shall be interpolated from these values

i) Film Width
Parameters: All Reel Film, except that for conversion into Heavy Duty Sacks, with a width of up to 1800mm and within a thickness range of 25-250 microns

The width of the film, and the width of open gussets (see page 6, figure 1) shall be measured off the reel and the tolerances shall be as follows: