1 Scope
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;
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— 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.