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ASTM D5419-14a

Historical Revision

Standard Test Method for Environmental Stress Crack Resistance (ESCR) of Threaded Plastic Closures

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1.1 This test method determines the susceptibility of threaded plastic closures to failure due to environmental stress cracking (ESC).

1.2 In use, threaded plastic closures can contact agents that appreciably reduce the stress at which cracks form. Examples of such agents are: soaps, detergents, oils, and liquid bleaches.

1.3 Major factors that influence environmental stress crack resistance (ESCR) of threaded plastic closures include the closure material(s), closure design, molded-in stress, and applied stress.

1.4 This procedure can be applied to all closures, but is particularly applicable to closures made from plastics based on polypropylene (PP) or polystyrene (PS).

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

1.6 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. Specific precautionary statements are given in Section 8 and 6.2.

Note 1: There is no known ISO equivalent to this standard.


5.1 This test method compares closures for ESCR. Suitable variables are: closure materials, closure designs, processes, applied torque, and stress-crack agents.

5.2 Results can be used for estimating shelf life of closures in terms of ESCR. This requires that the user has calibrated failure time in this test to failure time in the field for actual packaging systems.

SDO ASTM: ASTM International
Document Number D5419
Publication Date Dec. 1, 2014
Language en - English
Page Count 5
Revision Level 14a
Supercedes
Committee D20.19
Publish Date Document Id Type View
Sept. 1, 2021 D5419-21 Revision
Dec. 1, 2014 D5419-14A Revision
Nov. 15, 2014 D5419-14 Revision
Nov. 15, 2009 D5419-09 Revision
Jan. 1, 1995 D5419-95 Revision
July 10, 2003 D5419-95R03 Reaffirmation