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Dart Impact Tester


Presto’s Dart Impact Tester is used to determine the impact of load on a plastic film under specific conditions to analyze the effect of a free falling dart. A load of falling dart damages the plastic film under specified conditions. The testing instrument is widely used in plastic industries for judging the strength and stability of the plastic films and similar products.

Dart Impact is also known as impact failure load of plastic films is described as the load of the hemispherical shaped dart, falling on the plastic sheet or film held in a suitable clamp from a particular height, which causes the collapse of 50% of samples tested. Dart Impact Tester is a very beneficial tool for clearly controlling peak and normal strength characteristics to speed up the additives and production settings and adjustments, research and development of sheet and film materials.

PRESTO Dart Impact Tester is widely used by plastic film manufacturer for assessing the strength and durability of their plastic films, flexible films, sheets and similar other products. Works according to both Method-A and Method-B of test standard.

Presto’s Dart Impact Tester is a method to evaluate the strength or toughness of a plastic film. The test comprises of dart configuration and drop height with a different weight of the dart. Test results can be used as a quality control evaluation and also for end use assessments.

The dart is designed in a hemispherical form that can be dropped from uneven heights. It is held by  a electromagnetic dart holder which released by pressing a button from varying heights. A user can set the height of the dart manually. The result can be viewed from the digital panel.

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    • The machine is equipped with a clamp having 127mm diameter from inside.
    • The machine has electro-magnetic release mechanism.
    • The diameter of the dart head is 38mm for method A and 50 mm for method B.
    • Heights of fall can be set on the scale 660mm up to 1524 mm (as per the standards).
    • It is equipped with a digital counter.
    • The testing instrument requires Single Phase 220 V AC.
    • Vacuum Pump is available with the laboratory equipment as an optional accessory.
      • Maximum weight holding capacity of Dart Holding Mechanism: 2Kg
      • Dart Head Material: Special Silicate
      • Least Count of Height Adjustable Clamp:  1 mm
      • Type of test: Free-Falling Dart
      • Clamping Unit: Circular annular clamping unit with zero slippage


    Related Standards

    • IS 2508 – 1984 – For low Density Polythene films.

    • The machine is designed and built on a rigid metal base plate.
    • It has strong electromagnetic dart holders.
    • The dart is released at the press of a button.
    • It provides fast, reliable and accurate measurements from uneven heights.
    • The instrument is supplied with a conformance certificate traceable to NABL and Instruction Manual.
    • The machine is finished with Blue and Autumn Gray combination painting with bright chrome plating to provide a rust resistant finish.
    • Electromagnetic Hold and release mechanism for dart
    • Inbuilt Digital counter for counting number of falls during single test operation
    • Circular annular clamping devices for zero slippage
    • Shielding structure to prevent dart from falling out after bouncing from sample
    • Strong base plate with rugged structure
    • Clamping Shield height adjustable collar
    • Standard: IS 2508:1984(R2003), ASTM D1709-16A.

Reviews of Dart Impact Tester

  1. Krishna Singh
    23 Dec, 2015

    A good tool to measure the impact of load on a plastic film. An efficient tool to judge the strength and stability. A very beneficial tool to control peak and normal strength. I would suggest to all my friends who works for plastic firms, it’s a good machine.

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