BS EN ISO 1172:2023

Textile-glass-reinforced plastics. Prepregs, moulding compounds and laminates. Determination of the textile-glass and mineral-filler content using calcination methods. | Status: Current

1 Scope This document 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 document 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 do not apply 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.

NOTE For these materials, ISO 11667 can be used.