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High-strength wood-plastic composite board for road guardrails, and preparation method of high-strength wood-plastic composite board

A wood-plastic composite and high-strength technology, which is applied in the preparation of wood-plastic composite panels, high-strength wood-plastic composite panels and its preparation, can solve problems such as short service life, difficult process, and poor mechanical properties, and achieve improved mechanical properties And use, the preparation process is simple, the effect of improving compatibility

Inactive Publication Date: 2018-09-14
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that the mixing uniformity and compatibility of the composite system of the wood-plastic composite material in the prior art are poor, and the obtained composite material has poor mechanical properties, poor water resistance, poor wear resistance, difficult process, and short service life. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] a, woody plant fiber is pulverized to obtain fiber powder, add in the high-speed mixer, and add lye, heat up and carry out preliminary alkali treatment;

[0032] b. When the temperature of the fiber powder reaches 90°C, the fluorocarbon / nano-SiO 2 The hybrid emulsion was injected into the high-speed mixer through a syringe, and continued to mix with the fiber powder for 25 minutes;

[0033]c. Add PVC plastic, maleic anhydride grafted polypropylene and additives, continue to stir and mix for 15 minutes, add to a twin-screw extruder to extrude and granulate to obtain wood-plastic granules;

[0034] d. Mix and stir the wood-plastic granules prepared in step c and the color masterbatch, and extrude them through an extruder to obtain a wood-plastic board with a certain shape.

[0035] In step a, the woody plant fiber is rice husk fiber, and the average particle size after crushing is 200 μm; in step a, the lye is sodium hydroxide solution and potassium hydroxide solution, a...

Embodiment 2

[0039] a, woody plant fiber is pulverized to obtain fiber powder, add in the high-speed mixer, and add lye, heat up and carry out preliminary alkali treatment;

[0040] b. When the temperature of the fiber powder reaches 90°C, the fluorocarbon / nano-SiO 2 The hybrid emulsion was injected into the high-speed mixer through a syringe, and continued to mix with the fiber powder for 20 minutes;

[0041] c. Add PVC plastic, maleic anhydride grafted polypropylene and additives, continue to stir and mix for 10 minutes, add to a twin-screw extruder to extrude and granulate to obtain wood-plastic granules;

[0042] d. Mix and stir the wood-plastic granules prepared in step c and the color masterbatch, and extrude them through an extruder to obtain a wood-plastic board with a certain shape.

[0043] In step a, the woody plant fiber is rice straw fiber, and the average particle size after crushing is 80 μm; in step a, the lye is potassium hydroxide solution, and the mass concentration is ...

Embodiment 3

[0047] a, woody plant fiber is pulverized to obtain fiber powder, add in the high-speed mixer, and add lye, heat up and carry out preliminary alkali treatment;

[0048] b. When the temperature of the fiber powder reaches 90°C, the fluorocarbon / nano-SiO 2 The hybrid emulsion was injected into the high-speed mixer through a syringe, and continued to mix with the fiber powder for 30 minutes;

[0049] c. Add PVC plastic, maleic anhydride grafted polypropylene and additives, continue to stir and mix for 20 minutes, add to a twin-screw extruder to extrude and granulate to obtain wood-plastic granules;

[0050] d. Mix and stir the wood-plastic granules prepared in step c and the color masterbatch, and extrude them through an extruder to obtain a wood-plastic board with a certain shape.

[0051] In step a, the woody plant fiber is wheat straw fiber, and the average particle size after pulverization is 300 μm; in step a, the lye is barium hydroxide solution, and the mass concentration...

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PUM

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Abstract

The invention discloses a high-strength wood-plastic composite board for road guardrails, and a preparation method of the high-strength wood-plastic composite board. The wood-plastic composite board is prepared by the following steps: a. adding alkali liquor into woody plant fiber powder in a high-speed mixer, and heating for carrying out the preliminary alkali treatment; b. heating up to 90 DEG C, mixing fluorocarbon / nano SiO2 hybrid emulsion with the fiber powder; c. adding polyvinyl chloride (PVC) plastic, maleic anhydride grafted polypropylene and auxiliary agents, continuously stirring and mixing, and then extruding and granulating to obtain wood-plastic particles; d. mixing the wood-plastic particles with masterbatch, and extruding for molding to obtain the wood-plastic board havinga certain shape. The method has the beneficial effects that by means of non-polar treatment in the high-speed mixer, the surface of the fiber powder is coated with the hybrid emulsion droplets, so that the compatibility between the fiber powder and PVC plastic matrix is improved, and the mechanical properties and service performance of the wood-plastic composite board are improved; furthermore, the preparation process is simple in process and good in environmental protection property, thus being widely applied to the fields such as building fences.

Description

technical field [0001] The invention relates to the field of composite boards, in particular to the preparation of wood-plastic composite boards, in particular to a high-strength wood-plastic composite board used for road guardrails and a preparation method. Background technique [0002] Wood-plastic composite materials are composite materials formed by extrusion, pressing and other molding methods using wood fiber materials such as wood processing residues, forest tending residues, waste wood, crop straw, and waste thermoplastics as the main raw materials. Wood-plastic composite material not only has the high strength and high elasticity of wood fiber materials, but also has the advantages of high toughness and fatigue resistance of plastics. It is a new type of wood substitute material that is both similar to wood and better than wood. In recent years, this kind of wood-plastic composite material formed by compounding plant fiber and recycled plastic has gradually been rec...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L97/02C08L51/06C08L27/12C08K3/36
CPCC08L27/06C08K2201/011C08L2205/035C08L97/02C08L51/06C08L27/12C08K3/36
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD