物理安全检测
ASTM D4321塑料薄膜的包装屈服点的标准试验方法
ASTM D4321塑料薄膜的包装屈服点的标准试验方法—标准名称
ASTM D4321 Standard Test Method for Package Yield of Plastic Film
ASTM D4321 塑料薄膜的包装屈服点的标准试验方法
ASTM D4321塑料薄膜的包装屈服点的标准试验方法—适用范围
Scope：
This test method covers the determination of yield (area per unit mass) of plastic film. Also described in this test method is the means for calculating nominal yield, given values for nominal density, and nominal thickness. This is needed since, in material specifications, limits for yield are normally stated in terms of the percent deviation of actual yield from nominal yield.
ASTM D4321塑料薄膜的包装屈服点的标准试验方法—引用文件
ASTM D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
ASTM D883 Terminology Relating to Plastics
ASTM D1505 Test Method for Density of Plastics by the Density Gradient Technique
ASTM D4883 Test Method for Density of Polyethylene by the Ultrasound Technique
ASTM D6988 Guide for Determination of Thickness of Plastic Film Test Specimens
ASTM E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
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