ASTM D4168 Standard Test Methods for Transmitted Shock Characteristics of Foam-in-Place Cushioning Materials
The scope of the ASTM D4168 package test determines the shock-absorbing characteristics of foam-in-place packaging materials. There are two test methods in ASTM D4168 testing. Test Method A uses a free-fall package drop test apparatus. Test Method B uses a shock-test apparatus.
The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
ASTM D4168 package testing consists of using the cushioning material to be tested to support a weighted test block inside a package. The complete package is subjected to drops or controlled shocks and the accelerations transmitted to the test block are measured. Either Test Method A or B may be used. However, the two methods will not necessarily give the same result.
Data obtained by these methods may be used to determine the transmitted shock cushioning characteristics of foam-in-place packaging materials. These data allow design of cushioning systems that can provide adequate and efficient use of foam for protection of goods during a distribution life-cycle.
These methods, in contrast to other methods that usually test only the cushioning foam, are designed to evaluate foam-in-place cushioning materials in a manner in which the foam-in-place packaging material is used. In particular, the method includes simultaneous use of a plastic film, the foam, and the box usually used in this method of packaging.
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