BS EN ISO 1172:1999

Textile-glass-reinforced plastics. Prepregs, moulding compounds and laminates. Determination of the textile-glass and mineral-filler content. Calcination methods. | Status: Superseded, Withdrawn

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;
• — 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.