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Preparation method and application of improved wood-plastic composite material

A wood-plastic composite material and wood-plastic composite technology, which is applied in the field of preparation of improved wood-plastic composite materials, can solve the problem of reduced adhesion and fusion of PVC plastics, incompatibility of wood powder and light calcium carbonate powder, and easy production of finished products. Oxidative fading and other problems, to achieve the effect of improved oxidation resistance and flame retardancy, good bending resistance, and reduced moisture absorption

Active Publication Date: 2019-07-12
GUANGDONG HUANGTIAN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned wood-plastic composite material has many components, and the preparation process is relatively cumbersome; at the same time, after the mixed above-mentioned wood-plastic composite material is extruded into a product through an extruder, due to the presence of calcium carbonate powder, PVC plastic will appear. A series of problems such as reduced adhesion and fusion, reduced toughness of the product, incompatibility of wood powder and light calcium carbonate powder, and gaps in the product will lead to defects such as easy oxidative fading, low strength, and easy breakage of the finished product. Meet user needs

Method used

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  • Preparation method and application of improved wood-plastic composite material
  • Preparation method and application of improved wood-plastic composite material
  • Preparation method and application of improved wood-plastic composite material

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preparation example Construction

[0056] The present invention also provides a method for preparing an improved wood-plastic composite material, including the above-mentioned wood-plastic composite material, and the preparation method of the above-mentioned wood-plastic composite material includes the following steps:

[0057] S1. Melting of high-density polyethylene: Add high-density polyethylene into a high-speed mixer and heat-melt it into a flowable liquid to obtain a molten plastic liquid for later use.

[0058] In this step, the high-speed mixer of this embodiment adopts the high-speed mixer commonly used in the plastic industry on the market, which is suitable for mixing and stirring materials such as powder / granule / auxiliary / color powder / color masterbatch / plastic . The barrel body adopts an arc-shaped structure, and the special blade structure is mainly used to make the material form a vortex-like high-speed stirring and can be modified by heating. The heating temperature of the high speed mixer of th...

Embodiment 1

[0089] An improved wood-plastic composite material, including the following components in weight percentage:

[0090] High-density polyethylene 60%;

[0091] Nylon plastic powder 10%;

[0092] Bamboo fiber powder 25%;

[0093] Coloring agent 5%.

[0094] The preparation method of the wood-plastic composite material in embodiment 1 specifically comprises the following steps:

[0095] The following components are calculated in parts by weight.

[0096] S1. Melting of high-density polyethylene: add 60% of high-density polyethylene into a high-speed mixer and heat-melt it into a flowable liquid to obtain a molten plastic liquid, which is set aside. The heating temperature of the high-speed mixer of this embodiment is controlled at about 150°C.

[0097] S2. Dyeing: add 5% dyeing agent into the high-speed mixer to dye the molten plastic liquid.

[0098] S3. Mixing: add 25% wood fiber powder into the high-speed mixer, mix and stir evenly, then add 10% nylon plastic powder into th...

Embodiment 2

[0102] An improved wood-plastic composite material, including the following components in weight percentage:

[0103] High-density polyethylene 63%;

[0104] Nylon plastic powder 12%;

[0105] Bamboo fiber powder 20%;

[0106] Coloring agent 5%.

[0107] The preparation method of the wood-plastic composite material in embodiment 2 specifically comprises the following steps:

[0108] The following components are calculated in parts by weight.

[0109] S1. Melting of high-density polyethylene: add 63% high-density polyethylene into a high-speed mixer and heat-melt it into a flowable liquid to obtain molten plastic liquid, which is set aside. The heating temperature of the high-speed mixer of this embodiment is controlled at about 157°C.

[0110] S2. Dyeing: add 5% dyeing agent into the high-speed mixer to dye the molten plastic liquid.

[0111] S3. Mixing: add 20% wood fiber powder into the high-speed mixer, mix and stir evenly, then add 12% nylon plastic powder into the h...

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Abstract

The invention discloses a preparation method of an improved wood-plastic composite material. The preparation method comprises the following steps: high-density polyethylene melting, dyeing, mixing andmolding. The wood-plastic composite material comprises 50-70 wt% of high-density polyethylene, 10-20 wt% of nylon plastic powder and 20-30 wt% of wood fiber powder. The wood-plastic composite material is prepared by uniformly mixing the above components. The high-density polyethylene is used as a main raw material, and is mixed with nylon plastic and wood fiber powder, and the addition of the wood fiber powder makes the wood fiber powder completely coated with a high-density polyethylene melt, so the hygroscopicity of the wood fiber powder is greatly reduced, and the dispersibility, the oxidation resistance and the flame retardancy are greatly improved, thereby the strength of the wood-plastic composite material is increased; and the addition of the nylon plastic further improves the strength, and products manufactured from the wood-plastic composite material have excellent oxidation resistance, flexural resistance and bending resistance, and can meet the needs of use.

Description

technical field [0001] The invention relates to the field of materials, in particular to a preparation method and application of an improved wood-plastic composite material. Background technique [0002] Wood-plastic composites (Wood-Plastic Composites, WPC) is a new type of composite material that has been booming at home and abroad in recent years. It refers to the use of polyethylene, polypropylene and polyvinyl chloride, etc. Wood flour, rice husk, straw and other waste plant fibers are mixed into new wood materials, and then processed by extrusion, molding, injection molding and other plastic processing techniques to produce boards or profiles. Mainly used in building materials, furniture, logistics packaging and other industries. [0003] As shown in the Chinese Invention Patent No. 201310417130.0, it discloses a PVC foamed wood-plastic composite material and its manufacturing method. The wood-plastic composite material is made of the following raw materials in parts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L77/00C08L97/02C08K7/06
CPCC08L23/06C08L2201/08C08L2207/062C08L2205/16C08L77/00C08L97/02C08K7/06
Inventor 孔德玲
Owner GUANGDONG HUANGTIAN ENVIRONMENTAL PROTECTION TECH CO LTD
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