A kind of continuous fiber reinforced wood-plastic and its preparation method

A continuous fiber and wood-plastic technology, applied in the field of materials, can solve the problems of insignificant reinforcement effect and inability to exert the effect of long fiber reinforcement, and achieve the effect of improved mechanical properties and good compatibility

Active Publication Date: 2016-04-27
洪泽圣洛迪新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For fiber reinforcement in the prior art, glass fiber or aramid fiber is generally treated with a silane coupling agent, then cut into short fibers, mixed with wood powder, plastic, etc., and extruded into granules. The fiber is cut by the screw. Generally speaking, the length of the fiber in the product is less than 2mm, which cannot exert the good reinforcing effect of the long fiber itself. The bending strength of the obtained product can only reach 25-28MPa, and the bending elastic modulus is 2500-3000MPa. Intensity 5-8kJ / m2, the enhancement effect is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] S1, surface modified long fiber: mix 10 parts of maleic anhydride, 70 parts of epoxy resin prepolymer, 20 parts of N, N-m-phenylene bismaleimide to make a modifier and put it in a solvent In the tank, then pass the long roll of glass fiber through the solvent tank at a speed of 1m / min, the fiber is immersed in the modifier, and then the fiber is dried into rolls through a microwave oven at a speed of 1m / min, and the drying temperature is 70°C; The three raw materials of the modifier all react with the surface of the long fiber, so the modified long fiber has good compatibility with wood-plastic, so that it can be successfully applied to wood-plastic materials;

[0018] S2, granulation: 55 parts of wood fiber, 35 parts of waste plastic PE, 5 parts of maleic anhydride grafted PE compatibilizer, and 5 parts of lubricant are mixed and granulated;

[0019] S3. Extrusion: Add the material after granulation in step S2 into a conical twin-screw extruder for extrusion molding. T...

Embodiment 2

[0021] Embodiment 2 is roughly the same as Embodiment 1, except that the component content and process parameters are different, as follows.

[0022] S1, surface modified long fiber: mix 20 parts of maleic anhydride, 50 parts of epoxy resin prepolymer, 30 parts of N, N-m-phenylene bismaleimide to make a modifier and put it in a solvent In the tank, the long roll glass fiber is passed through the solvent tank at a speed of 2m / min, the fiber is immersed in the modifier, and then the fiber is dried into a roll through a microwave drying oven at a speed of 3m / min, and the drying temperature is 80°C;

[0023] S2. Granulation: 64 parts of wood fiber, 30 parts of waste plastic PE, 3 parts of maleic anhydride grafted PE compatibilizer, and 3 parts of lubricant are mixed and granulated;

[0024] S3. Extrusion: Add the material after granulation in step S2 into a conical twin-screw extruder for extrusion molding. The conical twin-screw extruder has four zones arranged in sequence accord...

Embodiment 3

[0026] Embodiment 3 is roughly the same as Embodiment 1, except that the component content and process parameters are different, as follows.

[0027] S1. Surface modification of long fibers: Mix 20 parts of maleic anhydride, 60 parts of epoxy resin prepolymer, and 20 parts of N, N-m-phenylene bismaleimide to make a modifier and place it in a solvent In the tank, the long roll of aramid fiber is passed through the solvent tank at a speed of 1.5m / min, the fiber is immersed in the modifier, and then the fiber is dried into a roll through a microwave drying oven at a speed of 2m / min, and the drying temperature is 60 ℃;

[0028] S2. Granulation: 40 parts of wood fiber, 35 parts of waste plastic PP, 4 parts of maleic anhydride grafted PE compatibilizer, and 3 parts of lubricant are mixed and granulated;

[0029] S3. Extrusion: Add the material after granulation in step S2 into a conical twin-screw extruder for extrusion molding. The conical twin-screw extruder has four zones arrang...

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Abstract

The invention discloses a continuous-fiber-reinforced wood plastic and a preparation method thereof. The preparation method comprises the following steps: long fiber surface modification, granulation and extrusion. The long fibers subjected to surface modification are used for reinforcing the wood plastic material, so that the wood plastic material has favorable compatibility. The addition position of the long fibers is beyond the shearing position of the screw, so the long fibers do not have the action of shearing force in the extrusion forming technique and can not be destroyed, thereby forming continuous fiber distribution in the obtained wood plastic. By reasonably selecting the weight parts of the components, the bending strength, elastic modulus in bending, shock strength and other mechanical properties of the end product are obviously enhanced.

Description

technical field [0001] The invention relates to a wood-plastic material, in particular to a continuous fiber-reinforced wood-plastic and a preparation method thereof, belonging to the field of materials. Background technique [0002] Ordinary wood-plastic materials have low strength and can only be used in low-end places. In order to improve the strength of wood-plastic materials, it is a good way to use fiber reinforcement. For fiber reinforcement in the prior art, glass fiber or aramid fiber is generally treated with a silane coupling agent, then cut into short fibers, mixed with wood powder, plastic, etc., and extruded into granules. The fiber is cut by the screw. Generally speaking, the length of the fiber in the product is less than 2mm, which cannot exert the good reinforcing effect of the long fiber itself. The bending strength of the obtained product can only reach 25-28MPa, and the bending elastic modulus is 2500-3000MPa. The strength is 5-8kJ / m2, and the enhanceme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L23/06C08L23/12C08L77/10C08K9/04C08K7/14C08J5/06C08J5/08
Inventor 何军许世华李靖戴东花严永刚陈龙
Owner 洪泽圣洛迪新材料有限公司
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