The national standard requires the shrinkage film to be tested for its thickness, tensile property, thermal shrinkage rate, right Angle tearing property and other physical tests. The national standard also points out that the physical indicators need to be used in the testing instrument: CHY-U thickness tester to test the thickness of the film; XLW-500N intelligent electronic tension machine to test the tensile property and right Angle tearing property; RSY-03 thermal shrinkage tester was used to test its thermal shrinkage rate. Requirements should be strictly in accordance with the national standard index detection.
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