patent wood plastics composites

Patent WO2010071879A2 - Wood-plastic composites utilizing

24 Jun 2010 An extruded composite adapted for use as a building material includes a core having a base polymer and a natural fiber in a substantially homogeneous mixture and an ionomer capstock. To improve adherence of the ionomer to a base polymer, the ionomer can be mixed with a similar or substantially similar base polymer prior to coextrusion with the core. Additionally, various additives may be mixed with the capstock material to improve visual aesthetics of the 

Patent US6153293 - Extruded wood polymer composite and method

28 Nov 2000 An extruded composite structural artificial lumber product is manufactured from wood fiber and polyethylene, including recycled polyethylene, by reducing the wood fiber and polyethylene each to a finely divided particles, mechanically mixing the wood fiber and polyethylene particles together with a measured amount of a powdered endothermic foaming agent, mechanically mixing the mixture, without pre-pelletization, in a twin-screw extruder where it is compressed 

Patent EP2114648B1 - Wood-plastic composites using recycled

3 Sep 2014 wherein the composite building material comprises the base polymer, the unseparated processed carpet waste, and the filler material in a substantially homogeneous mixture, characterized in that the composite building material is extruded and the unseparated processed carpet waste comprises a combination of fiber with an outer layer or coating of other carpet materials having lower melting points. The extruded building material composite of claim 1, further 

Patent US5486553 - Advanced polymer/wood composite structural

23 Jan 1996 A polymer and wood composite structural members can be manufactured by extruding and injection molding a composition comprising polyvinyl chloride, wood fiber and optionally a concentration of an intentionally added waste stream. Such structural members have strength, workability, fastener retention, resistance to rot and insect attack, and thermal properties sufficient to constitute an advanced composite wood replacement material. The advanced structural 

Patent WO2002088233A1 - Low-density cellular wood - Google

7 Nov 2002 LOW-DENSITY CELLULAR wood PLASTIC COMPOSITE AND PROCESS FOR FORMATION. CORRESPONDING APPLICATION. This patent application claims priority under 35 U.S.C. ยง119(e) to U.S. Provisional patent Application Serial Number 60/286,848, entitled "Extrusion of Low-Density Cellular wood Plastic Composite Using Low Pressure Injection of Carbon Dioxide and Moisture Vapor From wood as the Blowing Agent, filed April 26, 2001, in the name of 

Patent EP2448732A1 - Method for producing wood fibre-plastics

9 May 2012 A process for producing a composite product comprising fibres of a lignocellulosic material or natural fibres and a plastics material utilises a liquid or particulate binder formulation comprising a thermoset resin and a thermoplastic polymer, monomer, or oligomer. A composite product is formed for use as or in forming a feedstock in plastics manufacture may be broken down under heat and mechanical shearing in a plastics extrusion machine to release the major 

Patent US9073295 - Wood-plastic composites utilizing ionomer

7 Jul 2015 An extruded composite adapted for use as a building material includes a core having a base polymer and a natural fiber in a substantially homogeneous mixture and an ionomer capstock. To improve adherence of the ionomer to a base polymer, the ionomer can be mixed with a similar or substantially similar base polymer prior to coextrusion with the core. Additionally, various additives may be mixed with the capstock material to improve visual aesthetics of the 

Patent US20080128933 - Wood-Plastic Composites Using Recycled

5 Jun 2008 An extruded composite utilized as a building material includes a base polymer, unseparated processed recycled carpet waste, and a filler material, which may be a wood filler or other natural fiber. The recycled carpet waste may be used to decrease the amount of both base polymer and wood filler to achieve an equivalent product at lower cost. The extruded composite may also utilize chemical foaming agents to reduce density. Both foamed and non-foamed 

Patent WO2005044536A2 - Apparatus and method for low-density

19 May 2005 This application is a continuation-in-part of PCT Application Number WO 02/088233 (PCT US02/13188) which claims priority on U.S. Provisional patent Application Serial Number 60/286,848, entitled "Extrusion of Low-Density Cellular wood Plastic Composite Using Low Pressure Injection of Carbon Dioxide and Moisture Vapor From wood as the Blowing Agent", filed April 26, 2001, the entire contents of which are hereby expressly incorporated by reference into the 

Patent EP1940608A1 - Pvc/wood composite - Google Patents

9 Jul 2008 PVC/wood COMPOSITE. Field of the Invention. The present invention relates to a thermoplastic/natural cellulosic fiber composite, and more specifically to a high molecular weight compatibilizer within said composite resulting in both a high flexural strength and high modulus and significant reduction in water absorption. BACKGROUND OF THE INVENTION. Natural and wood fiber plastic compsites (WPCs) for decking and railing represent a very large market which 

Patent WO2013151287A1 - Wood plastic composites and - Google

10 Oct 2013 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 

Patent WO2008066751A1 - Wood-plastic composites - Google

5 Jun 2008 An extruded composite utilized as a building material includes a base polymer, unseparated processed recycled carpet waste, and a filler material, which may be a wood filler or other natural fiber. The recycled carpet waste may be used to decrease the amount of both base polymer and wood filler to achieve an equivalent product at lower cost. The extruded composite may also utilize chemical foaming agents to reduce density. Both foamed and non- foamed