Elastic recovery is related to the ability of a package to resume its original shape after being distended during its use cycle.

Elastic recovery also relates to the tightness or snugness of a package.

Stress retention is related to the tightness or snugness of a package.

1. Scope

1.1 This test method covers the measurement of recovery from extension, permanent deformation, and stress retention of stretch wrap film.

1.2 Several levels of extension are included to ascertain the effect of both small and large extensions.

1.3 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D882 Test Method for Tensile Properties of Thin Plastic Sheeting

D996 Terminology of Packaging and Distribution Environments

D1898 Practice for Sampling of Plastics

D2103 Specification for Polyethylene Film and Sheeting

E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process

E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

Keywords

elastic recovery; permanent deformation; stress retention; stretch wrap; thin films ; Deformation--stretch wrap materials; Elastic recovery; Extension; Machine direction elastic recovery; Permanent deformation; Recovery; Stress retention; Stretch wrap films/materials; Thin film applications

ICS Code

ICS Number Code 55.040 (Packaging materials and accessories)

Citing ASTM Standards

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