1 Scope
This document specifies two calcination methods for the determination of the textile
glass and mineral filler content of glass-reinforced plastics:
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— Method A: for the determination of the textile glass content when no mineral fillers are present.
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— 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:
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— prepregs made from yarns, rovings, tapes or fabrics;
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— SMC, BMC and DMC moulding compounds;
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— 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 do not apply to the following types of reinforced plastic:
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— those containing reinforcements other than textile glass;
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— those containing materials which do not completely burn off at the test temperature (for example, those based on silicone resin);
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— those containing mineral fillers which degrade at temperatures below the minimum calcination temperature.
NOTE For these materials, ISO 11667 can be used.