The F0008-Falling Dart Impact Tester covers the determination of the energy that causes polyethylene film to fail under specified conditions, with the impact of a free-falling dart. This energy is expressed in terms of weight (mass) of the dart falling from a specified height, which would result in 50% failure of specimens tested.
The instrument is manufactured with reference to international standards used for flexible films - ASTM D 1709, AS/NZS 4347.6, ISO 7765-1, JIS K7124 and GB 9639. As specified in the standard, two test methods are achievable with the falling dart impact tester: Test Method A uses a dart with a 38.0 ±1 mm diameter hemispherical head dropped from a height of 660 ±1mm. This method is generally used for films whose impact resistances require masses of about 50 g to 2 kg to fracture them.
Test Method B uses a dart with a 50.0 ±1 mm diameter hemispherical head dropped from a height of 1500 ±3mm. This method is generally used for films whose impact resistances require masses of about 0.3 to 2 kg to fracture them.
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