Standard Practice for Conditioning Flexible Barrier Materials for Flex Durability

Importancia y uso:

5.1 This practice is valuable in determining the resistance of flexible packaging materials to flex-formed pinholes. Conditioning levels A, B, or C are typically used. Reference Practice E171 and Guide F2097.

5.2 Conditions D and E are typically used for determining the effect of flexing on barrier properties and transmission rates related to gas and/or moisture.

5.3 This practice does not measure or condition materials for abrasion related to flex failure.

5.4 Failures in the integrity of one or more of the plies of a multi-ply structure may require alternative testing. Supplementary permeation testing using gas or water vapor can be used in conjunction with the flex conditioning to measure the loss of ply integrity. Other test methods may be used after flexing for assessment of presence of pinholes. For a list of test methods, refer to Guide F2097.

FIG. 1 Planar Evolution of Gelbo Shaft Helical Groove 30.70 mm [1.20 in.] Diameter Shaft

5.4.1 The various conditions described in this practice are to prevent evaluating a material structure with an outcome of too many holes to effectively count (normally greater than 50), or too few to be significant (normally less than five per sample). Material structure, testing basis, and a mutual agreement with specified objectives are to be considered in the selection of conditioning level for testing.

Subcomité:

F02.50

Referida por:

F1296-08R23, F1052-20, F3352_F3352M-23B

Volúmen:

15.10

Número ICS:

55.040 (Packaging materials and accessories)

Palabras clave:

barrier; barrier materials; flex crack; flex resistance; flexible; gas permeation; gas transmission rate; pinhole; water vapor transmission rate; WVTR;