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High strength wood-plastic coated coextruded composite material and preparation method thereof

A technology for coating co-extrusion and composite materials, which is applied in the direction of wood layered products, chemical instruments and methods, synthetic resin layered products, etc. The problems of poor mechanical properties of cladding co-extruded profiles and limiting the application range of wood-plastic composite materials can reduce the risk of falling off, improve the properties such as creep resistance and impact resistance, and improve the performance of impact resistance and creep resistance.

Inactive Publication Date: 2016-06-08
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent documents with publication numbers CN102757592A, CN103788555A, and CN103240940A disclose some coated co-extruded wood-plastic profiles and their preparation methods. However, the core layers involved in the above-mentioned patent documents all use biomass powder as raw material, which is not suitable for wood-plastic profiles. The profile only plays the role of "filling" without "strengthening", so the mechanical properties of wood-plastic coated co-extruded profiles are poor, especially the performance of impact resistance and creep resistance has not been further improved, which will greatly limit The scope of application of wood-plastic composite materials in some engineering fields that have special requirements for material strength; in addition, the cladding layer involved in the above-mentioned patent documents uses polymer as the main component, and its creep resistance and impact resistance properties, And the binding force with the cladding layer still needs to be further improved

Method used

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  • High strength wood-plastic coated coextruded composite material and preparation method thereof
  • High strength wood-plastic coated coextruded composite material and preparation method thereof
  • High strength wood-plastic coated coextruded composite material and preparation method thereof

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Embodiment 1

[0035] In this embodiment, the wood-plastic coated co-extruded profile is in the shape of a square column, and its cross-sectional schematic diagram is as follows figure 1 shown. The wood-plastic clad co-extrusion profile is composed of a cladding layer and a core layer, and the cladding layer is clad on the surface of the core layer through a co-extrusion process.

[0036] In terms of mass percentage, the core layer consists of the following components:

[0037] 55% wood fiber, and the length of the wood fiber is 0.1-4.0mm, and the aspect ratio is 10:1-100:1

[0038] Recycled Polyethylene 40%

[0039] Coupling agent - maleic anhydride grafted polyethylene 2%

[0040] Inorganic Filler - Calcium Carbonate 2%

[0041] Lubricant - Polyethylene Wax 1%.

[0042] In terms of mass percentage, the coating layer consists of the following components:

[0043] HDPE 40%

[0044] Polypropylene 10%

[0045] Ethylene-methyl acrylate copolymer 20%

[0046] Ethylene-vinyl alcohol copo...

Embodiment 2

[0060] In this embodiment, the wood-plastic coated co-extruded profile is a solid floor, and its cross-sectional schematic diagram is as follows figure 2 shown. The plastic clad co-extrusion profile is composed of a cladding layer and a core layer, and the cladding layer is clad on the surface of the core layer through a co-extrusion process.

[0061] In terms of mass percentage, the core layer consists of the following components:

[0062] Bamboo fiber 50%, and the length of said bamboo fiber is 0.1~4.0mm, aspect ratio is about 10:1~100:1

[0063] Recycled Polyethylene 45%

[0064] Coupling agent - titanate 1.8%

[0065] Inorganic Filler - Talc 2.2%

[0066] Lubricant - 1% consisting of 40% by mass of stearic acid and 60% by mass of polyethylene wax.

[0067] In terms of mass percentage, the coating layer consists of the following components:

[0068] HDPE 55%

[0069] Polypropylene 7.5%

[0070] Ethylene-methyl acrylate copolymer 15.5%

[0071] Ethylene-vinyl alcoh...

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Abstract

The invention provides a high strength wood-plastic coated coextruded composite material. The material is composed of a core layer and a coating layer. The coating layer coats the surface of the core layer through a co-extrusion technology, biomass powder in the core layer is improved to a biomass fiber material, because of a large length-diameter ratio, the biomass fiber material not only plays a "filling" role in a wood-plastic composite material, but also plays a "reinforcing" role, greatly improves the mechanical properties of the composite material, especially improves the impact resistance, creep resistance and other properties, thereby broadening the application scope of the wood-plastic composite material. In addition, the coating layer involved in the invention preferably contains ethylene-methyl acrylate copolymer resin, ethylene-vinyl alcohol copolymer resin and high strength fiber, thus being conducive to further enhancing the mechanical properties of the composite material and the binding force with the core layer.

Description

technical field [0001] The invention belongs to the technical field of wood-plastic composite materials, and in particular relates to a high-strength wood-plastic coated co-extruded composite material and a preparation method thereof. Background technique [0002] The wood-plastic composite material is based on agricultural and forestry biomass resources as the main raw material, through mechanical crushing, chemical modification and other pretreatments, and a certain proportion of thermoplastic polymers are melted and mixed in the mixing equipment, and then extruded, shaped, A new type of composite material formed by cooling and other processes. Wood-plastic composites combine the renewable biomass resources and the machinable characteristics of polymer materials. It can make full use of waste biomass and reduce the use of non-degradable petroleum-based plastics. It is a promising development. "Low-carbon, green and recyclable" materials. As a new type of composite materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B21/02B32B27/06B32B27/18B32B37/02C08L97/02C08L23/06C08L23/12C08L23/08C08K13/04C08K7/14C08K3/26C08K3/34B29C47/92B29C48/92
Inventor 张安将赵永青韩振徐婷薛立新
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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