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Falling Dart Impact Tester
The falling dart impact test is a straightforward and efficient way to test the impact strength or toughness of films. It allows the measurement of the material’s impact resistance, by dropping a free-falling dart and recording the resulting effect on the film, which is clamped in place.
There are two main methods for testing, Method A and Method B. They are differentiated by the height of the drop and the diameter of the dart head.
Falling Dart Impact Test - Method A
Method A uses a dart head of 38±1mm and is made of low-density materials like aluminum or phenolic plastic. The drop height is 0.66±0.01m.
Falling Dart Impact Test - Method B
Method B uses a dart head of 50±1mm and is made of tough materials such as polished stainless steel. The drop height is 1.50 ±0.01m.
Saicheng falling dart impact tester can be used for the determination of impact resistance of packaging materials such as plastic films, laminates by a free falling dart from a certain height. This instrument is designed according to ASTM D1709, ISO 7765-1 with method A & B.
BMC-H Free Falling Dart Impact Tester
BMC-H Free Falling Dart Impact Tester is designed for determination of the impact resistance of packaging materials such as plastic films, laminates and paper by a free-falling dart from a certain height.
Surasit Tungtweegait from ThailandPosted on Jul 20, 2021 Very good equipment! The equipment complies with ASTM D1709 standard. I used it to test the impact resistance of the plastic films, and the operation is very convenient.
What is Falling Dart Impact Tester ?
Falling dart impact is a traditional method for evaluating the impact strength or toughness of a plastic film. There are two main methods for testing, Method A and Method B. These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the weight (mass) of the missile falling from a specified height which would result in 50 % failure of specimens tested.
Falling Dart Impact Test Method - ASTM D1709, ISO 7765-1
Falling Dart Impact Test - Method A
Test Method A employs a dart with a 38.10 ±0.13mm (1.500 ±0.005in.) diameter hemispherical head dropped from a height of 0.66 ±0.01 m (26.0 ±0.4 in.). This test method can be used for films whose impact resistances require masses of about 50 g to about 6 kg to fracture them.
Falling Dart Impact Test - Method B
Test Method B employs a dart with a 50.80 ±0.13mm (2.000 ±0.005-in.) diameter hemispherical head dropped from a height of 1.52 ±0.03 m (60.0 + 0.25,−1.70 in.). Its range of applicability is from about 0.3 kg to about 6 kg.
Test Methods A and B are used to establish the weight of the dart when 50 % of the specimens fail under the conditions specified.
The results obtained by Test Methods A and B are greatly influenced by the quality of film under test. The confidence limits of data obtained by this procedure can, therefore, vary significantly, depending on the sample quality, uniformity of film gage, die marks, contaminants, etc.
