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Production technology of high-strength wood plastic composite material

A wood-plastic composite material and production process technology, which is applied in the field of composite materials, can solve problems such as poor freeze-thaw resistance, water absorption warping, deterioration of anti-mildew and antibacterial performance, etc., and achieve the effect of increasing strength and reducing water absorption

Active Publication Date: 2013-10-23
浙江格林特木塑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wood-plastic composite material has a certain water absorption rate. After absorbing water, the mechanical strength of the wood-plastic composite material drops sharply, the freeze-thaw resistance performance deteriorates, the anti-mildew and antibacterial performance deteriorates, and even problems such as water absorption warping and cracking occur.

Method used

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  • Production technology of high-strength wood plastic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Dry the wood powder so that the moisture content of the plant fiber is 0.4%;

[0029] (2) Put 60 parts of dried wood powder, 30 parts of thermoplastic PE and 10 parts of maleic anhydride grafted PP into a mixer, and mix it at high speed for 8 minutes, control the stirring speed at 350rpm, and control the temperature at 85°C;

[0030] (3) The mixed material is transported to the parallel twin-screw extruder through the transportation pipeline for the first granulation to obtain wood-plastic particles. The speed of the main machine is 400 rpm, the current is 75% of the rated current of the main machine, and the temperature is controlled during granulation. at 160°C;

[0031] (4) Then add 100 parts of wood-plastic particles, 2 parts of EBS, 2 parts of zinc stearate, and 10 parts of red iron oxide into the mixer and put them in the mixer for cold mixing for 10 minutes. The stirring speed is controlled at 200rpm and the temperature is controlled at 80 ℃, mix well;

[0...

Embodiment 2

[0035] (1) Dry the wood powder and straw powder so that the moisture content of the plant fiber is 0.3%;

[0036] (2) Put 30 parts of dried wood flour, 20 parts of straw powder, 10 parts of PE, 20 parts of PP and 8 parts of maleic anhydride grafted PE into a mixer, and mix them cold for 9 minutes, with the stirring speed controlled at 300rpm. The temperature is controlled at 80°C;

[0037] (3) The mixed material is transported to the parallel twin-screw extruder through the transportation pipeline for the first granulation to obtain wood-plastic particles. The speed of the main machine is 350rpm, the current is 70% of the rated current of the main machine, and the temperature is controlled at 180°C during granulation. ;

[0038] (4) Then add 100 parts of wood-plastic particles, 5 parts of EBS, 5 parts of calcium stearate, and 8 parts of iron oxide red into the mixer for 12 minutes of high-speed cold mixing. The stirring speed is controlled at 300 rpm and the temperature is co...

Embodiment 3

[0042] (1) Dry the wood powder and bamboo powder so that the moisture content of the plant fiber is 0.5%;

[0043] (2) Put 50 parts of dried wood powder, 22 parts of bamboo powder, 10 parts of PE, 15 parts of ABS, 8 parts of maleic anhydride grafted PP, and 5 parts of acrylic acid grafted PP in a mixer, and mix them cold for 10 minutes. The stirring speed is controlled at 200rpm, and the temperature is controlled at 85°C;

[0044] (3) The mixed material is transported to the parallel twin-screw extruder through the transportation pipeline for the first granulation to obtain wood-plastic particles. The speed of the main machine is 300 rpm, the current is 80% of the rated current of the main machine, and the temperature is controlled during granulation. at 190°C;

[0045] (4) Add 100 parts of wood-plastic particles, 1 part of polyol ester, 1 part of calcium stearate, and 1 part of iron oxide red into the mixer for 15 minutes of cold mixing. The stirring speed is controlled at 3...

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Abstract

The invention relates to the composite material field, and concretely relates to a production technology of a high-strength wood plastic composite material. The technology comprises the following steps: 1, uniformly mixing 20-80 parts by weight of a dried vegetable fiber, 10-30 parts by weight of a thermoplastic plastic and 3-10 parts by weight of a compatilizer in a mixer; 2, transporting a mixture obtained in step 1 to a parallel double screw extruder, and carrying out primary granulation to obtain wood plastic particles; 3, uniformly mixing the wood plastic particles, 1-5 parts by weight of a lubricant and 1-10 parts by weight of a pigment in the mixer; 4, transporting a mixture obtained in step 3 to the parallel double screw extruder, and carrying out secondary granulation to obtain a primary material; and 5, transporting the obtained primary material to a conical double screw extruder, and carrying out extrusion molding. The influences of the lubricant to the interface compatibility among the vegetable fiber, the compatilizer and the plastic are avoided through the separate addition of the lubricant and the above two-time plasticizing granulation, so the water absorption rate of the wood plastic composite material is effectively reduced, and the strength of the wood plastic composite material is increased.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a production process of high-strength wood-plastic composite materials. Background technique [0002] Wood-plastic composite material is a new type of composite material that has emerged in recent years at home and abroad. It refers to the use of thermoplastics such as polyethylene, polypropylene, and polyvinyl chloride instead of resin adhesives, and a certain amount of waste plant fibers such as wood powder, rice husk, and straw. The mixed new wood material, and then through extrusion, molding, injection molding and other plastic processing techniques, the board or profile produced is an excellent substitute for natural wood. Wood-plastic composite materials have the dual characteristics of wood and plastic, good dimensional stability, and can make full use of waste plant fibers and waste plastics to reduce environmental pollution, so they are widely used in interior decorati...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L23/06C08L23/12C08L55/02B29C47/92B29B9/06B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 张清锋
Owner 浙江格林特木塑材料有限公司
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