Preparation method of wood-like wood-plastic composite sheet material

A technology of wood-plastic composite and wood structure, which is applied in the field of preparation of wood-plastic composite boards with imitation wood structure, can solve the problems of cumbersome processing technology of bamboo wood-based panels, shortage of high-quality wooden building materials, and small format of wood/plastic boards, and achieve product format Large size, low cost, and the effect of overcoming dry shrinkage and wet expansion

Inactive Publication Date: 2013-10-09
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a wood-like structure bamboo-plastic composite board manufacturing method in order to solve the problems of shortage of large-format high-quality wooden building materials, cumbersome processing technology of bamboo wood-based panels, high cost and small format of wood / plastic boards

Method used

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  • Preparation method of wood-like wood-plastic composite sheet material

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specific Embodiment approach 1

[0016] Specific implementation mode one: the preparation method of the wood-like structure wood-plastic composite board of the present implementation mode is carried out according to the following steps:

[0017] 1. Slab paving: Spread a layer of plastic powder on the bottom of the mold, then spread a layer of bamboo poles on top, and spread plastic powder on the bamboo poles; continue to spread bamboo poles on top, and then spread a layer of plastic powder ;

[0018] 2. Repeat step 1 until the thickness of the slab is 10-60mm;

[0019] 3. Preheating: Preheat the mold with the slab paved in step 2 at a temperature of 130°C to 140°C, so that the inside and outside of the slab are heated to 130°C to 140°C, and then cover the mold cover;

[0020] 4. Hot press forming: heat the mold preheated in step 3 at a temperature of 160°C to 185°C and a pressure of 1.5 to 3MPa, and perform hot pressing for 1.2 to 1.8 minutes per millimeter of slab;

[0021] 5. Demoulding: Cool the hot-pres...

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the plastic powder is polyethylene, polypropylene or polyvinyl chloride, wherein the plastic is recycled plastic or primary plastic, and the particle size of the plastic powder is 40-120 mesh. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the moisture content of the bamboo pole is below 8%. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a preparation method of a wood-like wood-plastic composite sheet material. The preparation method solves the problem that the existing wood-plastic material has a low strength-weight ratio, a high cost and small breadth. The preparation method comprises the following steps of paving bamboo poles and plastic powder in a mold layer upon layer, carrying out hot pressing molding, carrying out cooling, and carrying out demolding. The wood-like wood-plastic composite sheet material is prepared from waste, thin and short bamboo poles and waste and old plastic, has the advantages of simple processes, low cost, large product breadth, low density, high strength, high elastic modulus and creep resistance, and can solve the problem that wood can produce hygroexpansion easily. The preparation method can be used in the fields of house, bridge, vehicle and ship manufacture.

Description

technical field [0001] The invention relates to a method for preparing a wood-plastic composite board with imitation wood structure. Background technique [0002] Wood has the advantages of low density, high strength, and biodegradability. As an engineering material, it is widely used in the fields of housing, bridges, and vehicle and ship manufacturing. However, due to the shortage of wood resources and the decline of materials worldwide, it is difficult to obtain high-strength-to-weight ratio, low-cost, and large-format wooden building materials. However, my country is rich in bamboo resources. Bamboo grows fast, has high yield, and many mechanical and physical and chemical properties are better than wood. It is a traditional building material in the southern region and is used in houses, simple bridges and other facilities. Bamboo is hollow and has the advantage of a very high strength-to-weight ratio. However, tiny bamboo poles cannot be used as building materials, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/02B29C43/18
Inventor 王伟宏唐伟王清文
Owner NORTHEAST FORESTRY UNIVERSITY
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