Moulding of filled synthetic plastics moulding compositions

Abstract From the Canadian patent

This specification discloses a method of producing moulded synthetic plastics artefacts by a continuous moulding or extrusion sequence. There is disclosed a method of injection moulding amino-formaldehyde thermosetting material to produce a cured artefact having filler homogeneously dispersed therein without requiring the preliminary step of compounding a moulding powder having the filler already homogeneously dispersed therein which comprises the steps of: (a) providing a dry thermosetting amino-formaldehyde material which is partly condensed but essentially solid at room temperatures;, (b) introducing said dry material and filler in at best a rough, non-homogeneous blend directly into the …