BS 7344:1990

Committees responsible
Foreword
Specification
1. Scope
2. Definitions
3. Composition
4. Appearance and finish
5. Conditioning of test specimens
6. Dimensional tolerances
7. Classification
8. Marking
Appendices
A. Additional properties to be agreed between purchaser
    and manufacturer
B. Specimen orientation for the determination of gloss
C. Method to determine resistance to opening of blocked
    polyethylene layflat tubular film
D. Common trade abbreviations
Tables
1. Spot thickness and average thickness tolerances
2. Yield tolerance for a consignment of reels
3. Classifying properties
4. Additional properties
Figures
1. General arrangement for determination of resistance
    to opening of blocked layflat tubular film
2. Common trade abbreviations

Specifies tolerances on length, width and thickness and details a classification system to cover basic physical characteristics. Also lists additional optional properties with corresponding test methods.

This British Standard specifies unprinted low density (≤ 927 kg/m³) polyethylene film in the form of sheet or layflat tubing, excluding coextrusions, in the thickness range 25 µm to 300 µm, available in widths up to 2 m (i.e. up to 4 m centre folded). It includes tolerances on the length, width, weight and thickness of the film, and a classification system covering certain basic physical characteristics. This standard excludes special films.

NOTE The titles of the publications referred to in this standard are listed on the inside back cover.