ASTM D5420, ASTM D4226

Gardner Impact Resistance of Rigid Plastic

 Purpose: This test method is used to determine the impact resistance of rigid plastic by falling weight (Gardner Impact).

Sample: Plastic sheets

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Basic Description: The panel is placed in the impact tester.  A weight is dropped at a specific height.  The height and weight are adjusted until failure is found. The results from 20 impacts are used for calculating the mean failure height.

Limitations: Flat coated panels

Method Publisher: https://www.astm.org/d5420-21.html

Keywords:

  • Izod Impact
  • Impact of coating
  • Charpy Impact

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