Due to the very large number of tests offered, descriptions of those most commonly requested have been gathered into the following groups:

ASTM D3531 – Resin Flow Testing

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ASTM D3531 testing covers the determination of the amount of resin flow that will take place for prepreg tape or sheet under specified temperature and pressure.

A weighed specimen, minimum size of 50 mm (2 in) square, is sandwiched between a bleeder material and release film. The sandwich is placed in a platen pressed this is heated to 120 °C, 175 °C, or another temperature specified by the customer. The press is closed to provide 700 kPa of pressure and is help until 15 minutes or the resin gels. The specimen is re-weighed.

Resin flow is used for comparative evaluation of materials and evaluation on production process design.

Please email or call (304) 547-5800 for information regarding test procedures, specimen size, pricing or any other ASTM D3531 questions you may have.

Reference: ASTM D3531 – Standard Test Method for Resin Flow of Carbon Fiber-Reinforced Epoxy Prepreg