초록

An extrusion profile is formed of foamed plastic, which includes a filler of wood flour or wood fiber. The foamed plastic may include polyvinyl chloride, chlorinated polyvinyl chloride or polystyrene in combination with the wood flour filler.

대표청구항 ▼

[ What is claimed is:] [1.] A method of forming a solid elongated member of predetermined profile for use as a door, window or frame molding, comprising the steps of:encapsulating wood flour particles with a polymer resin in an extrudable material by high intensity mixing, said extrudable material c

[ What is claimed is:] [1.] A method of forming a solid elongated member of predetermined profile for use as a door, window or frame molding, comprising the steps of:encapsulating wood flour particles with a polymer resin in an extrudable material by high intensity mixing, said extrudable material consisting essentially of, in parts (volume):______________________________________ polymer resin: in an amount of up to 100 wood flour: 15-140 stabilizers: in an amount up to 5 lubricants: in an amount up to 5 process aids: in an amount up to 10, ______________________________________extruding and cutting said extrudable material to form pellets of said extrudable material,mixing additional polymer resin and a non-aqueous blowing agent with said pellets to form an extrudable foam material,compressing said extrudable foam material at a compression stage by passage through an orifice, said orifice having at one end thereof a predetermined profile,said foam material consisting essentially of, in parts (volume):______________________________________ polymer resin: in an amount up to 100 wood flour: 15-140 stabilizers: in an amount up to 5 lubricants: in an amount up to 5 process aids: in an amount up to 10 blowing agents: .2 to 5 ______________________________________expanding said foam material through a shaper, said shaper having an internal solid surface defining a channel for said foam material, andsolidifying said foam material to form a solid elongated member.