Co-extrusion wood-plastic composite material and preparation method thereof

A technology for wood-plastic composite materials and raw materials, which is applied in the field of co-extruded wood-plastic composite materials and their preparation, can solve problems such as mechanical properties gap, and achieve excellent mechanical properties and improve mechanical properties.

Inactive Publication Date: 2019-09-10
六盘水康博木塑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is still a big gap between the mechanical properties of existing wood-plastic composite products and the materials of building structures.

Method used

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  • Co-extrusion wood-plastic composite material and preparation method thereof
  • Co-extrusion wood-plastic composite material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0026] The raw materials for the preparation of the core layer include matrix materials;

[0027] The raw materials for preparing the middle layer include long fiber reinforced thermoplastic resin and coupling agent, and the mass ratio of the long fiber reinforced thermoplastic resin to coupling agent is (5-30):100;

[0028] The surface layer includes the following preparation raw materials in parts by weight: 100 parts of base resin, 2-30 parts of high molecular polymer, 0.5-5 parts of foaming agent, 5-20 parts of filler, 0.1-1 part of antioxidant, 1-3 parts of 5 parts lubricant.

[0029] The co-extruded wood-plastic composite material provided by the invention includes a core layer, a middle layer and a surface layer, and the preparation raw materials of the core layer include matrix materials. In the present invention, the base material is preferably PP or PE-based wood-plastic composite material. In the present invention, the thickness of the core layer is preferably 5-1...

Embodiment 1

[0057] Core component: PE-based wood-plastic composite material;

[0058] Take by weight the following middle layer components: 100 parts of coupling agent (maleic anhydride grafted polyethylene), 5 parts of fiber-reinforced PP with a length of 0.5 mm;

[0059] Weigh the following surface layer components in parts by weight: 100 parts of base resin (PVC), 5 parts of high molecular polymer (EMAA), 1 part of foaming agent (calcium carbonate), 5 parts of filler (talcum powder), 0.1 part of anti-corrosion Oxygen agent (antioxidant 1010), 2 parts of lubricant (zinc stearate);

[0060] drying the core layer components at 100° C. for 3 hours to obtain core layer pellets;

[0061] Preliminarily mixing and drying the middle layer components, the drying temperature is 100° C., and the drying time is 3 hours to obtain middle layer pellets;

[0062] Preliminarily mixing and drying the surface layer components at a temperature of 100° C. for 3 hours to obtain surface layer pellets;

[0...

Embodiment 2

[0065] Core component: PP-based wood-plastic composite material;

[0066] Weigh the following middle layer components in parts by weight: 100 parts of coupling agent (silane coupling agent), 10 parts of fiber-reinforced PE with a length of 1 mm;

[0067] Weigh the following surface layer components in parts by weight: 100 parts of base resin (ASA), 10 parts of polymer (ethylene-vinyl acetate-vinyl alcohol copolymer), 3 parts of blowing agent (magnesium carbonate), 10 parts of filler (aluminum oxide), 0.5 parts of antioxidant (antioxidant 1010), 3 parts of lubricant (oxidized polyethylene wax);

[0068] drying the core layer components at 105° C. for 2 hours to obtain core layer pellets;

[0069] Preliminary mixing and drying of the middle layer components, the drying temperature is 105°C, and the drying time is 2h, to obtain middle layer pellets;

[0070] Preliminarily mixing and drying the surface layer components, the drying temperature is 105° C., and the drying time is 2...

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Abstract

The invention belongs to the technical field of wood-plastic composite materials, and particularly relates to a co-extrusion wood-plastic composite material and a preparation method thereof. A coupling agent is adopted as a middle layer for bonding a core layer and a surface layer, the interfacial bonding force of the surface layer and the core layer is enhanced, and long fiber-reinforced resin isadded to the middle layer, so that the mechanical properties of the wood-plastic composite material is improved significantly. The wood-plastic composite material has a hardness of 75 N/mm<2> , the bending strength reaches 60 MPa, and the flexural modulus can reach 5.5 GPa.

Description

technical field [0001] The invention relates to the technical field of wood-plastic composite materials, in particular to a co-extruded wood-plastic composite material and a preparation method thereof. Background technique [0002] Wood-plastic composite material, also known as wood-plastic composite material, referred to as WPC. It is an environmentally friendly composite material obtained by granulating and extruding plastic, wood powder, coupling agent, lubricant and other additives. With its excellent mechanical properties, wood-plastic composites have been widely used in construction materials, interior decoration and other fields. [0003] Ordinary co-extruded wood-plastic materials are usually composed of a surface layer and a core layer. Some functional additives can be added to the surface layer to improve certain aspects of performance; the core layer is generally based on ordinary wood-plastic formula, and necessary processing aids can be added. Agents, such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/08B32B27/30B32B9/00B32B9/04B32B27/28C08L27/06C08L23/08C08K3/34C08L51/04C08K3/22C08K7/08C08J9/08B29C48/18
CPCB29C48/18B32B9/00B32B9/045B32B27/08B32B27/28B32B27/30B32B27/32B32B2419/00B32B2601/00C08J9/08C08J2203/02C08J2323/08C08J2327/06C08J2351/04C08J2423/08C08K3/34C08K7/08C08K2003/2227
Inventor 周灿何兴灏黎栋
Owner 六盘水康博木塑科技有限公司
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