Dart Impact Strength is a measure of a material's ability to withstand impact and is an important property to consider in applications where the material is likely to be subjected to impact loads. It is a traditional method for evaluating the impact strength or toughness of plastic film/sheeting It is typically measured by dropping a weighted dart from a specified height onto a sample of the material and measuring the amount of force required to cause a visible hole or crack.
The Drop Dart test is, ASTM D1709, ISO 7765.
Specimen size:
Film samples that can be cut to 230 mm x 230 mm (9" x 9") specimens
A minimum of 30 specimens are required for the test
The importance of Dart Impact Strength depends on the specific application of the material. Here are some examples:
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Packaging: In the packaging industry, Dart Impact Strength is critical for materials used in shipping containers, such as corrugated boxes and bags. These materials are likely to be subjected to impact loads during transportation and handling, so they need to be able to withstand the impact without breaking or tearing.
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Automotive: In the automotive industry, Dart Impact Strength is important for materials used in car interiors, such as dashboards and door panels. These materials need to be able to withstand impact loads from passengers and objects without cracking or breaking, which could lead to injury or damage to the vehicle.
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Construction: In the construction industry, Dart Impact Strength is important for materials used in building envelopes, such as siding and roofing. These materials need to be able to withstand impact loads from weather events, such as hail or wind-blown debris, without cracking or breaking and compromising the integrity of the building.
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Consumer goods: In the consumer goods industry, Dart Impact Strength is important for materials used in products such as toys, sporting equipment, and electronic devices. These materials need to be able to withstand impact loads from use and abuse by consumers without breaking or becoming unsafe to use.
Overall, Dart Impact Strength is an important property to consider in any application where the material is likely to be subjected to impact loads, and it is necessary to ensure the safety and durability of the product or structure.
