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Preparation method of plastic-wood composite material

A wood-plastic composite material and plastic technology, applied in the field of materials, can solve the problems of troublesome handling, weighing and feeding, affecting product performance and quality, uneven distribution of plastic fibers, etc., so as to reduce the energy consumption of water removal and improve product performance. , the effect of reducing water content

Active Publication Date: 2015-04-22
南京聚新锋新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual production process of WPC, there are certain differences in the size and proportion distribution of plant fibers. At the same time, the shape and size of plastic particles are quite different. The delamination between sizes leads to uneven distribution of plastics and fibers of different sizes in a short period of time during the preparation of wood-plastic composites, resulting in changes in the material structure and affecting the performance and quality of the product.
At the same time, plant fiber is produced in the form of powder, which will generate a lot of dust, and it is troublesome to carry, weigh and add materials. On the one hand, it causes environmental pollution, and on the other hand, it reduces production efficiency.

Method used

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  • Preparation method of plastic-wood composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Pellet the plant fibers to make plant fiber granules with a diameter of 3mm and a length of 5mm;

[0018] 2. Pour 35% high-density polyethylene, 60% plant fiber particles, 2.5% stearic acid, and 2.5% maleic anhydride grafted polyethylene into the mixer in order according to the above weight ratio. The mixing time is 15min;

[0019] 3. Add the above-mentioned mixture into the 75 parallel twin-screw granulation extruder, and directly extrude the block material in the molten state. Then it is crushed by a crusher into soft and dry small pieces of pellets, and finally cooled by air on the conveyor belt or by air in the pipeline to reduce the temperature of the pellets to below 60°C, so as to produce pellets of wood-plastic composite materials. The heating temperature of each section of the pelletizing extruder is 102, 146, 155, 160, 172, 176, 180°C.

[0020] 4. Extrude the test materials in the early stage and late stage of the experiment into plastic wood profiles thr...

Embodiment 2

[0022] 1. Pellet the plant fibers to make plant fiber granules with a diameter of 1mm and a length of 3mm;

[0023] 2. Pour 35% high-density polyethylene, 60% plant fiber particles, 2.5% stearic acid, and 2.5% maleic anhydride grafted polyethylene into the mixer in order according to the above weight ratio. The mixing time is 15min;

[0024] 3. Add the above-mentioned mixture into the granulation extruder, and directly extrude the block material in molten state. Then it is crushed by a crusher into soft and dry small pieces of pellets, and finally cooled by air on the conveyor belt or by air in the pipeline to reduce the temperature of the pellets to below 60°C, so as to produce pellets of wood-plastic composite materials. The heating temperature of each section of the pelletizing extruder is 102, 146, 155, 160, 172, 176, 180°C.

[0025] 4. Extrude the test materials in the early stage and late stage of the experiment into plastic wood profiles through a 65 conical twin-scre...

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Abstract

The invention relates to a preparation method of a composite material, particularly relates to a preparation method of a plastic-wood composite material and belongs to the technical field of materials. The preparation method of the plastic-wood composite material comprises the following steps: (1) granulating by using plant fiber: granulating plant fiber into cylindrical granules with diameter of 1-8mm and length of 5-50mm by using granulating equipment; (2) mixing: mixing the cylindrical granules with plastic and an additive to obtain a mixture; (3) preparation of a composite material: adding the mixture into a plastic-wood granulating extruder, extruding the mixture into molten blocks, crushing the molten blocks into soft and dry small granules, and finally cooling the granules to the temperature below 60 DEG C to obtain the granules of the plastic-wood composite material; and (4) extruding the granules of the plastic-wood composite material into plastic-wood profiles by using a twin-screw extruder.

Description

technical field [0001] The invention relates to a method for preparing composite materials, in particular to a method for preparing wood-plastic composite materials, and belongs to the field of material technology. Background technique [0002] Wood-plastic composite material is a new type of composite material that is made of plant fiber powder such as plastic and wood powder as the main raw material, plus other additives through extrusion, molding, injection and other processes. It has no cracks, no deformation, Corrosion resistance, strong plasticity, can realize personalized modeling very simply, high environmental protection, no pollution, no pollution, the product does not contain benzene, formaldehyde and other substances, and can be recycled. It is a brand new green environmental protection product and is also a Ecologically clean composite materials are attracting more and more attention in recent years. Wood-plastic composite materials can be used as packaging mat...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/12C08L27/06C08L97/02
CPCB29B9/06B29C48/92B29C2948/92704C08J3/124C08J2397/02C08J2423/06C08J2451/06C08L97/02C08L2205/03C08L2207/062C08L23/06C08L51/06C08K5/09
Inventor 朱方政丁建生闫武
Owner 南京聚新锋新材料有限公司
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