FIBER-REINFORCED THERMOSETTING RESIN MOLDING MATERIAL AND PROCESS FOR ITS PRODUCTION

摘要

A moulding compsn. contains a liq. thermosetting resin such as a polyester resin) contg. a styrene monomer as crosslinking component; together with glass fibre bundles contg. 600-1400 fibres per bundle and at least 1.0% by wt. of a binder which adheres to the fibres (pref. 1.0-2.3% and esp. 1.7-2.3%), the binder contg. 40-90% by wt. of styrene-insol. material (pref. 45-85%). The glass fibre bundles are 6-25mm long (pref. 12-18 mm), and the glass fibre content of the whole compsn. is pref. 15-30% by wt. (esp. 15-25%). The compsn. may be obtd. by blending the glass fibre bundles into the thermosetting resin contg. styrene monomer.