Standard Test Method for Tear-Propagation Resistance (Trouser Tear) of Plastic Film and Thin Sheeting by a Single-Tear Method

Importancia y uso:

5.1 This test method is of value in rating the tear-propagation resistance of various plastic films and thin sheeting of comparable thickness. For highly extensible film or sheeting the deformation energy of the specimen legs is significantly greater than the tearing energy. The tear-propagation resistance in slightly extensible or non-extensible film or sheeting is distinguished from the tear-propagation resistance in highly extensible film or sheeting by the load-time or load-displacement data, (Fig. 1 and Fig. 2). The tear-propagation force for slightly extensible or non-extensible material is determined from the average tear force versus the initial and peak force for a highly extensible material.

FIG. 1 Load-Time Chart for Low-Extensible Film

FIG. 2 Load-Time Chart for Highly Extensible Film

5.2 This test method shall be used for specification acceptance testing only after it has been demonstrated that the data for the particular material are acceptably reproducible.

5.3 The data obtained by this test method furnish information for ranking the tear-propagation resistance of plastic films and sheeting of similar composition. Actual use performance may not necessarily correlate with data from this test method. Sets of data from specimens of dissimilar thickness are usually not comparable.

5.4 Before proceeding with this test method, reference should be made to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, or testing parameters, or combination thereof, covered in the relevant ASTM material specification shall take precedence over those mentioned in this test method. If there are no relevant ASTM material specifications, then the default conditions apply. Table 1 of Classification Systems D4000 lists the ASTM materials standards that currently exist.

Subcomité:

D20.19

Referida por:

D3851-17R22, D8065_D8065M-16R23, F2097-23, D2103-23A, D4635-16, F2097-23

Volúmen:

08.01

Número ICS:

83.140.10 (Films and sheets)

Palabras clave:

plastic film; single tear; tear; tear-propagation; thin sheeting; trouser;