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Co-extrusion wood-plastic foaming board

A wood-plastic foaming and foaming cavity technology is applied in the field of wood-plastic composite materials, which can solve the problems of high consumption of raw materials, high production cost, and high density of co-extruded wood-plastic boards.

Pending Publication Date: 2021-06-04
湖州森宏环保木塑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, in view of the above content, the present invention provides a co-extruded wood-plastic foam board, which solves the problems of high density, high raw material consumption and high production cost of the prior art co-extruded wood-plastic board.

Method used

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  • Co-extrusion wood-plastic foaming board
  • Co-extrusion wood-plastic foaming board
  • Co-extrusion wood-plastic foaming board

Examples

Experimental program
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Embodiment 1

[0028] refer to figure 1 and figure 2 , a co-extruded wood-plastic foam board, comprising a foam core layer 1 and a surface layer 2 wrapped outside the foam core layer 1, the foam core layer 1 and the surface layer 2 are compositely formed by a co-extrusion foaming mold, so The co-extrusion foaming mold comprises an extrusion section 3, an expansion section 4, a co-extrusion section 5 and a cooling section 6 connected in sequence, the extrusion section 3 is provided with a raw material flow chamber 7, and the expansion section 4 is provided with a foaming cavity 8, the co-extrusion section 5 is provided with a composite cavity 9, and the cooling section 6 is provided with a cooling cavity 10, and the raw material flow cavity 7, the foaming cavity 8, the composite cavity 9, and the cooling cavity 10 are sequentially connected, and the The upper and lower sides of the expansion section 4 are provided with exhaust holes 11, the upper and lower sides of the co-extrusion section ...

Embodiment 2

[0034] A co-extruded wood-plastic foam board, the preparation method comprising the following steps:

[0035] (1) Mix the raw materials of the foam core layer and transport them to the main twin-screw extruder, and heat until the raw materials are in a molten state. The raw materials of the foam core layer include 54 parts by weight of high-density polyethylene, 36 parts Wood flour, 2 parts of compatibilizer, 1.5 parts of coupling agent, 1.8 parts of dispersant, 1 part of composite foaming agent produced by Fujian Star New Material Technology Co., Ltd.

[0036] (2) Mix the raw materials of the surface layer and transport them to the auxiliary twin-screw extruder, and heat until the raw materials are in a molten state. The raw materials of the surface layer include 32 parts of elastic materials, 20 parts of high-density polyethylene, and 32 parts of wood by weight. Powder, 1.4 parts of compatibilizer, 2.1 parts of coupling agent, 0.3 parts of antioxidant, 2 parts of interface mod...

Embodiment 3

[0040] A co-extruded wood-plastic foam board, the preparation method comprising the following steps:

[0041] (1) After mixing the raw materials of the foam core layer, transport them to the main twin-screw extruder, and heat until the raw materials are in a molten state. The raw materials of the foam core layer include 64 parts by weight of high-density polyethylene, 50 parts Wood powder, 3 parts of compatibilizer, 2 parts of coupling agent, 2.4 parts of dispersing agent, 1.2 parts of microsphere foaming agent (butane and pentane wrapped in organic material shell), 0.3 part of white foaming agent (nitrous acid salt derivatives);

[0042] (2) Mix the raw materials of the surface layer and transport them to the auxiliary twin-screw extruder, and heat until the raw materials are in a molten state. The raw materials of the surface layer include 40 parts of elastic materials, 25 parts of high-density polyethylene, and 36 parts of wood by weight. Powder, 1.8 parts of compatibilize...

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Abstract

The invention relates to the technical field of wood-plastic composite materials and provides a co-extrusion wood-plastic foaming board. The co-extrusion wood-plastic foaming board comprises a foaming core layer and a surface layer wrapped on the surface of the foaming core layer, wherein the foaming core layer and the surface layer are compounded and formed through a co-extrusion foaming mold; the co-extrusion foaming mold comprises an extrusion section, an expansion section, a co-extrusion section and a cooling section which are sequentially connected with each other; the extrusion section is provided with a raw material flowing cavity; the expansion section is provided with a foaming cavity; the co-extrusion section is provided with a compounding cavity; the cooling section is provided with a cooling cavity; the raw material flowing cavity, the foaming cavity, the compounding cavity and the cooling cavity are sequentially communicated with each other; exhaust holes are formed in the upper side and the lower side of the expansion section; feeding openings are formed in the upper side and the lower side of the co-extrusion section; a heat insulation partition plate is arranged between the co-extrusion section and the cooling section; and forced cooling water pipeline loops are arranged on the upper side and the lower side of the cooling cavity. Through the co-extrusion wood-plastic foaming board, the problems of large density, high consumption of raw materials and high production cost of the co-extrusion wood-plastic board in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of wood-plastic composite materials, in particular to a co-extruded wood-plastic foam board. Background technique [0002] Wood-plastic composite is a composite material made of wood or cellulose as the base material and plastic. Wood-plastic composite materials have the dual advantages of wood and plastic, and have many characteristics that pure wood and plastic cannot match: it has a wooden appearance and a secondary processability similar to wood, but its dimensional stability is better than that of wood, and its water absorption is small. , not afraid of moths, and will not produce cracks and warping deformation like wood; it has the processability of thermoplastics, but its hardness is higher than that of plastics, and it is wear-resistant, aging-resistant, and corrosion-resistant. However, wood-plastic composites also have the disadvantages of high density, poor ductility, low toughness, and low impac...

Claims

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Application Information

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IPC IPC(8): B29C48/18B29C48/92C08L23/06C08L97/02C08L101/00C08L51/06C08K3/26C08K3/34C08J9/32C08J9/10
CPCB29C48/18B29C48/0022B29C48/92C08J9/107C08J9/32C08J9/0061C08L97/02C08L101/00C08J2323/06C08J2497/02C08J2203/04C08J2203/22C08L2207/062C08L2205/035C08K2003/265B29C2948/92704C08L23/06C08L51/06C08K3/26C08K3/34
Inventor 余继春李贝汤晓斌李晓峰
Owner 湖州森宏环保木塑材料有限公司
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