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ASTM International

Standard Specification for Polyethylene Films Made from Medium-Density Polyethylene for General Use and Packaging Applications
 N D3981 REV A

Annotation

This specification covers unpigmented, unsupported, sheet or tubular, medium-density polyethylene films (hereafter referred to as film or films) from resins having densities in the range from 926.0 to 938.0 kg/m3 (0.926 to 0.938 g/cm3), inclusive, as measured on molded plaques.

This specification is applicable to homopolymer polyethylene but is not restricted to it.

This specification is also applicable to films made from copolymer polyethylene commonly referred to in industry as low-pressure polyethylene.

This specification is also applicable to films made from blends of homopolymers and copolymers, including ethylene/ vinyl-acetate copolymers.

This specification allows for the use of recycled polyethylene film or resin as feedstock, in whole or in part, as long as all the requirements of this specification are met and as long as any specific requirements as governed by the producer and end user are also met (see Note 1).

NOTE 1—Guide D 7209 contains terminology and definitions relating to recycled plastics.

Special care must be exercised if this specification is applied to colored or pigmented films. This specification does not address specific problems associated with coloring, such as, quantity and quality of pigment dispersion, optical properties, and increase in density. These and other areas must be taken into account by mutual agreement between the supplier and the purchaser.

The thickness of the films covered by this specification range from 25 to 100 ?m (0.001 to 0.004 in.), inclusive. The maximum width of the sheet or lay-flat is 3.05 m (120 in.).