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Method for preparing novel polyethylene wood-plastic composite material

A wood-plastic composite material and polyethylene technology, which is applied in the field of building materials, can solve the problems of polyethylene-based wood-plastic composite materials such as insufficient anti-corrosion performance, shortened service life, and performance degradation, so as to eliminate weak boundary effects and improve uniformity. Sexuality, the effect of increasing the degree of response

Inactive Publication Date: 2015-06-24
江西欧居工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The polyethylene raw material used in this patent is waste polyethylene, and the wood powder is poplar wood powder, miscellaneous wood powder or crop straw powder, which is low in price, saves energy, and protects the environment. However, the prepared polyethylene-based wood-plastic The anti-corrosion performance of the composite material is not good enough, and it will be corroded after long-term use in some humid or high acid-base environments, resulting in a greatly reduced performance and a greatly shortened service life

Method used

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  • Method for preparing novel polyethylene wood-plastic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of a novel polyethylene wood-plastic composite material, the steps are as follows:

[0028] (1) Add rapeseed straw, cotton straw and cotton straw with a weight ratio of 1:2:1 to a pulverizer for 3 hours and put them in a drying oven at 120°C for 12 hours to obtain the following wood with a water content of 5%. powder, soak the wood powder in a NaOH solution with a mass fraction of 20% and ultrasonically treat it for 40 minutes, the weight ratio of the wood powder to the NaOH solution is 1:2, take it out, wash it with deionized water, and dry it in an oven at 90°C for 20 minutes Sieve after 1 hour, and the particle size is 70-80 mesh alkalized wood flour;

[0029] (2) Put polyethylene, maleic anhydride, rare earth oxide, and DCP in a weight ratio of 100:4:1:2 into a mixer and knead at 140°C for 15 minutes, cool naturally to room temperature, and pulverize to obtain a rare earth phase Toner;

[0030] (3) Add phenolic resin and rare earth chloride wi...

Embodiment 2

[0034] A preparation method of a novel polyethylene wood-plastic composite material, the steps are as follows:

[0035] (1) Add rapeseed straw, cotton straw and cotton straw with a weight ratio of 1:2:1 to a pulverizer for 3 hours and put them in a drying oven at 120°C for 12 hours to obtain the following wood with a water content of 5%. powder, soak the wood powder in a NaOH solution with a mass fraction of 20% and ultrasonically treat it for 40 minutes, the weight ratio of the wood powder to the NaOH solution is 1:2, take it out, wash it with deionized water, and dry it in an oven at 90°C for 20 minutes Sieve after 1 hour, and the particle size is 70-80 mesh alkalized wood flour;

[0036] (2) Put polyethylene, maleic anhydride, rare earth oxide, and DCP in a weight ratio of 100:4:1:2 into a mixer and knead at 140°C for 15 minutes, cool naturally to room temperature, and pulverize to obtain a rare earth phase Toner;

[0037] (3) Add phenolic resin and rare earth chloride wi...

Embodiment 3

[0041]A preparation method of a novel polyethylene wood-plastic composite material, the steps are as follows:

[0042] (1) Add rapeseed straw, cotton straw and cotton straw with a weight ratio of 1:2:1 to a pulverizer for 3 hours and put them in a drying oven at 120°C for 12 hours to obtain the following wood with a water content of 5%. powder, soak the wood powder in a NaOH solution with a mass fraction of 20% and ultrasonically treat it for 40 minutes, the weight ratio of the wood powder to the NaOH solution is 1:2, take it out, wash it with deionized water, and dry it in an oven at 90°C for 20 minutes Sieve after 1 hour, and the particle size is 70-80 mesh alkalized wood flour;

[0043] (2) Put polyethylene, maleic anhydride, rare earth oxide, and DCP in a weight ratio of 100:4:1:2 into a mixer and knead at 140°C for 15 minutes, cool naturally to room temperature, and pulverize to obtain a rare earth phase Toner;

[0044] (3) Add phenolic resin and rare earth chloride wit...

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Abstract

The invention discloses a method for preparing a novel polyethylene wood-plastic composite material. The method comprises the following steps: (1) smashing a rape stalk, a cotton stalk and a cotton straw, baking to obtain wood powder, immersing the wood powder in a NaOH solution to perform ultrasonic treatment, taking out, rinsing by deionized water, drying and screening to obtain the alkalified wood powder; (2) mixing polyethylene, maleic anhydride, rare earth oxide and DCP to obtain a rare earth compatilizer; (3) adding phenolic resin and rare earth chloride into a reaction kettle, heating and stirring, heating the reaction solution till boiling, performing reflux reaction, continuously heating, keeping the temperature, stopping heating and reacting to obtain the rare earth phenolic resin; (4) mixing polyethylene, the alkalified wood powder, the compatilizer and the rare earth phenolic resin, moving to an oven, and drying to achieve constant weight to obtain the mixed materials; (5) adding the mixed materials into a conical twin-screw extruder, extruding and granulating to obtain the granules, and baking to obtain the polyethylene wood-plastic composite material.

Description

Technical field: [0001] The invention relates to a building material, in particular to a preparation method of a polyethylene wood-plastic composite material. Background technique: [0002] Wood-plastic composites (Wood-Plastic Composites, referred to as WPC) is a new type of composite material that has been booming at home and abroad in recent years. New wooden materials mixed with waste plant fibers such as rice husks, straws, etc., and then processed into plates or profiles produced by extrusion, molding, injection molding, etc., are mainly used in building materials, furniture, logistics packaging and other industries. Polyethylene wood-plastic composite material is one of the most widely used wood-plastic composite materials, with good processing performance, strength, adjustability, and light stability. [0003] For example, the Chinese patent with the publication number CN101792609B and the publication date of 2012.04.18, and the applicant is Dezhou Sanhui Wood-Plast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L97/02C08L61/06C08K3/16C08H8/00B29B9/06B29C47/92B29C48/92
CPCC08L23/06C08L2205/035C08L97/02C08L51/06C08L61/06C08K3/16C08K2003/221
Inventor 董芬芳
Owner 江西欧居工程有限公司
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