ISO 1172:2023

Current Revision
Textile-glass-reinforced plastics - Prepregs, moulding compounds and laminates - Determination of the textile-glass and mineral-filler content using calcination methods

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ISO 1172:2023

Textile-glass-reinforced plastics - Prepregs, moulding compounds and laminates - Determination of the textile-glass and mineral-filler content using calcination methods

PUBLISH DATE 2023
ISO 1172:2023

This document specifies two calcination methods for the determination of the textile glass and mineral filler content of glass-reinforced plastics:

Method A: for the determination of the textile glass content when no mineral fillers are present.

Method B: for the determination of the textile-glass and mineral-filler content when both components are present.

This document is applicable to the following types of material:

  • prepregs made from yarns, rovings, tapes or fabrics;
  • SMC, BMC and DMC moulding compounds;
  • textile-glass-reinforced thermoplastic moulding materials and granules;
  • filled or unfilled textile-glass laminates made with thermosetting or thermoplastic resins.

The methods do not apply to the following types of reinforced plastic:

  • those containing reinforcements other than textile glass;
  • those containing materials which do not completely burn off at the test temperature (for example, those based on silicone resin);
  • those containing mineral fillers which degrade at temperatures below the minimum calcination temperature.
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