Preparation method of flame-retardant type wood-plastic composite

A wood-plastic composite material and flame-retardant technology, which is applied in the field of preparation of wood-plastic composite materials, can solve the problems that flame retardants are difficult to fully penetrate, a large amount of smoke, and does not involve the generation of flame retardants, etc., achieving low production costs, Good flame retardant, simple operation effect

Active Publication Date: 2016-04-13
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, wood-plastic composites have the following defects: raw material wood fiber and plastic materials are combustible, and will produce a lot of smoke and dust when burned
[0005] Based on the current patented flame retardant technology of wood-plastic composite materials, flame retardants are mainly externally added, and it is difficult for flame retardants to fully penetrate into the gap structure of plant fibers. There is no work involving in-situ generation of flame retardants in the gap structure of plant fibers. method

Method used

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  • Preparation method of flame-retardant type wood-plastic composite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First weigh 87.7g of aluminum sulfate, dissolve it in 350ml of water, and make an aluminum sulfate solution with a mass concentration of 20%; weigh 200g of wood powder and put it in a 1000ml three-necked flask, add 437.7g of aluminum sulfate solution while stirring, and then use a separate Liquid funnel drips the ammoniacal liquor that 125g mass concentration is 25%, leaves standstill 30min, pours into petri dish after stirring evenly, dries at 80 ℃, obtains the wood powder modified by aluminum hydroxide and ammonium sulfate; Put 150 parts of wood flour, 7 parts of copolymer of maleic anhydride and polyethylene, and 100 parts of high-density polyethylene into a high-speed mixer and mix evenly to obtain a mixed material; then put the mixed material into a twin-screw extruder Melt extrusion and granulation in a twin-screw extruder, the barrel temperature of the twin-screw extruder is 150~200°C, the die temperature is 150~180°C, the screw speed is 60~200r / min, injection mol...

Embodiment 2

[0029] First take by weighing 83.0g magnesium sulfate, be dissolved in 350ml water, make the magnesium sulfate solution that mass concentration is 19.2%; Take by weighing 200g bagasse and pack in the 1000ml three-neck flask, add 433g magnesium sulfate solution while stirring, then use liquid separation Funnel dripping 113g mass concentration is the ammoniacal liquor of 25%, leave standstill 30min, pour into petri dish after stirring evenly, dry at 80 DEG C, obtain the bagasse of magnesium hydroxide and ammonium sulfate modification; 100 parts of slag and 7 parts of graft copolymers of polyethylene and maleic anhydride, methyl methacrylate and butyl acrylate, and 100 parts of high-density polyethylene are put into a high-speed mixer and mixed uniformly to obtain mixed materials; then The mixed materials are put into the twin-screw extruder for melt extrusion and granulation. The barrel temperature of the twin-screw extruder is 150~200°C, the die temperature is 150~180°C, and the...

Embodiment 3

[0031] First weigh 175.5g of aluminum sulfate and dissolve it in 500ml of water to make an aluminum sulfate solution with a mass concentration of 26%; weigh 200g of wood powder and put it in a 1000ml reactor, add 675.5g of aluminum sulfate solution while stirring, and then use Add 250g mass concentration to the liquid funnel dropwise and be 25% ammoniacal liquor, leave standstill 30min, pour in the tray after stirring evenly, dry at 80 DEG C, obtain the wood powder modified by aluminum hydroxide and ammonium sulfate; 100 parts of polypropylene , 8 parts of graft copolymers of polypropylene and maleic anhydride, methyl methacrylate and butyl acrylate were mixed in an open mixer at 190°C for 10 minutes to obtain a uniformly mixed polymer matrix, and gradually added modified 200 parts of wood flour, continue to mix for 5 minutes to obtain a uniformly mixed material; put the uniformly mixed material into a flat vulcanizer at 190°C for 5 minutes, and then transfer it to a flat vulca...

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Abstract

The invention discloses a preparation method of a flame-retardant type wood-plastic composite. The preparation method includes the steps of adding plant fiber to a reaction still, adding an aluminum sulfate solution or a magnesium sulfate solution over stirring, dropwise adding ammonia water, standing for 15-40 min, conducting drying at 80 DEG C after even stirring, obtaining flame-retardant modified plant fiber, fusing, mixing and forming 10-250 parts of flame-retardant modified plant fiber, 90-120 parts of plastic and 1-10 parts of compatilizer, and obtaining the flame-retardant type wood-plastic composite. The heat release speed is low and the smoke yield is small when the wood-plastic composite combusts; compared with a composite without fire retardant, the flame retardance performance of the composite is remarkably improved; the method is easy to operate, and production cost is low.

Description

technical field [0001] The invention relates to a preparation method of a wood-plastic composite material, in particular to a preparation method of a flame-retardant wood-plastic composite material. Background technique [0002] Wood-plastic composite materials are composite materials made of wood fiber materials and plastics as the main raw materials. They are widely used because of their excellent water resistance and corrosion resistance, insect resistance, and long service life. However, wood-plastic composites have the following disadvantages: raw material wood fibers and plastic materials are inflammable, and will produce a lot of smoke and dust when burned. [0003] At present, it is mainly used to add flame retardants to materials to improve their flame retardancy. Commonly used flame retardants for wood-plastic composites mainly include inorganic flame retardants, intumescent flame retardants and nanoclay particles. Inorganic flame retardants such as aluminum hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L23/06C08L23/12C08L51/06C08L35/06C08K3/30C08K3/22B29B9/06B29C47/92B29C35/02B29C48/92
CPCB29B9/06B29C35/02B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92904C08L97/02C08L2201/02C08L2205/025C08L2205/03C08L2205/08C08L2207/062C08L23/06C08L51/06C08K2003/3054C08K2003/2227C08K2003/2224C08L23/12C08L35/06
Inventor 洪浩群李雪松张海燕
Owner GUANGDONG UNIV OF TECH
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