WOOD PLASTIC COMPOSITES AND MANUFACTURING METHOD THEREOF
First Claim
1. A method of manufacturing wood plastic composites comprising the steps of:
- removing lignin contained in wood chips through a cooking process of high temperature and pressure;
crushing the wood chip from which lignin was removed in order to produce wood flour;
putting and mixing polymer resins and additives into the wood flour so as to manufacture mixture of a gel phase; and
extrusion-molding, injection-molding or compression-molding the mixture to manufacture wood plastic composites.
1 Assignment
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Accused Products
Abstract
Disclosed therein are wood plastic composites and a manufacturing method thereof, which can provide a high discoloration resistance by removing lignin from wood flour which is a main material of the wood plastic composites. The method of manufacturing wood plastic composites includes the steps of: removing lignin contained in wood chips through a cooking process of high temperature and pressure; crushing the wood chip from which lignin was removed in order to produce wood flour; putting and mixing polymer resins and additives into the wood flour so as to manufacture mixture of a gel phase; and extrusion-molding, injection-molding or compression-molding the mixture to manufacture wood plastic composites. The wood plastic composites and the manufacturing method thereof can prevent decoloration and after-yellowing even though the wood plastic composites are exposed to UV or moisture for a long time to thereby enhance long-term weather resistance.
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Citations
8 Claims
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1. A method of manufacturing wood plastic composites comprising the steps of:
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removing lignin contained in wood chips through a cooking process of high temperature and pressure; crushing the wood chip from which lignin was removed in order to produce wood flour; putting and mixing polymer resins and additives into the wood flour so as to manufacture mixture of a gel phase; and extrusion-molding, injection-molding or compression-molding the mixture to manufacture wood plastic composites. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification