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The tear tester determinates the average force to propagate tearing through a specified length of plastic film or nonrigid sheeting after the tear has been started. It helps to rank relative tearing resistance of various plastic films and thin sheeting of comparable thickness.
Principle: Acting by gravity, the pendulum swings through an arc, tearing the specimen from a precut slit. This loss in energy indicates the force required to tear the specimen.
Standards: ASTM D1922, ASTM D1424, ASTM D689, ISO 6383, ISO 1974, GB/T16578.2-2009, GB/T 455,

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