Description

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.

Scope

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.