UNE-EN ISO 1172:2024

This International Standard 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 International Standard 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 are not applicable 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.

For these materials, ISO 11667, Fibre-reinforced plastics - Moulding compounds and prepregs -Determination of resin, reinforcement-fibre and mineral-filler content - Dissolution method, may be used.