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Flame retardant and wood-plastic composite material

A technology of wood-plastic composite materials and flame retardants, applied in the field of wood-plastic composite materials, can solve the problems of affecting the flame-retardant grade and weakening the flame-retardant performance of composite materials, and achieve the effect of slowing down the burning speed

Active Publication Date: 2020-05-12
ANHUI KOJO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the application and development of wood-plastic composite materials, it is found that the flame-retardant and durable performance of wood-plastic composite materials is not as good as expected. Closed, it will weaken the flame retardant performance of the composite material and affect its final flame retardant grade

Method used

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  • Flame retardant and wood-plastic composite material
  • Flame retardant and wood-plastic composite material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The preparation method of the wood-plastic composite material of the above-mentioned embodiment is as follows: spray the flame retardant onto the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer , coupling agent, processing aid, and lubricant are mixed and configured into intermediate pellets; by spraying, the flame retardant can be evenly contacted with wood flour, and the mixing of materials is always improved during the mixing process, thereby improving the effect of flame retardancy ;

[0042] Extruded by twin-screw extruder;

[0043] Put the intermediary pellets into the extruder and heat to 130-190°C for extrusion; extruder barrel temperature is 130-180°C, mold temperature is 130-200°C, host speed is 10-30r / min, feeding speed 10~25r / min.

Embodiment 1

[0046] The wood-plastic composite material includes in parts by weight: 80 parts of PVC resin, 35 parts of wood powder, 15 parts of calcium carbonate, 35 parts of synergist, 1 part of foaming agent, 10 parts of stabilizer, 1 part of coupling agent, processing aid 10 parts of lubricant, 2 parts of lubricant and 20 parts of flame retardant;

[0047] Wherein, the shell component of the flame retardant is aluminum hydroxide, the middle layer component is zinc borate hydrate, and the core component is magnesium hydroxide; and, the particle diameter of the flame retardant is: D50<60nm, D90<100nm; the inner core and the middle layer are connected by an adhesive, and the middle layer is connected with the outer shell by an adhesive.

[0048] The weight part ratio of described aluminum hydroxide, hydrated boric acid zincate and magnesium hydroxide is 3: 2: 1;

[0049] The particle diameters of the aluminum hydroxide, zinc borate hydrate and magnesium hydroxide are all less than 20nm; ...

Embodiment 2

[0057] The wood-plastic composite material includes in parts by weight: 120 parts of PVC resin, 15 parts of wood powder, 35 parts of calcium carbonate, 15 parts of synergist, 3 parts of foaming agent, 5 parts of stabilizer, 2 parts of coupling agent, processing aid 6 parts of lubricant, 4 parts of lubricant and 8 parts of flame retardant;

[0058] Wherein, the shell component of the flame retardant is aluminum hydroxide, the middle layer component is zinc borate hydrate, and the core component is magnesium hydroxide; and, the particle diameter of the flame retardant is: D50<60nm, D90<100nm; the inner core and the middle layer are connected by an adhesive, and the middle layer is connected with the outer shell by an adhesive.

[0059] The weight part ratio of described aluminum hydroxide, hydrated boric acid zincate and magnesium hydroxide is 3: 2: 1;

[0060] The particle diameters of the aluminum hydroxide, zinc borate hydrate and magnesium hydroxide are all less than 20nm; ...

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Abstract

The invention discloses a flame retardant and a wood-plastic composite material, the flame retardant having a three-layer structure; the flame retardant comprises a shell, a middle layer and an innercore, wherein the component of the shell is aluminum hydroxide, the component of the middle layer is hydrated zinc borate, and the component of the inner core is magnesium hydroxide; the particle diameter D50 of the flame retardant is less than 60 nm, and the particle diameter D90 of the flame retardant is less than 100 nm; the inner core is connected with the middle layer through an adhesive, andthe middle layer is connected with the outer shell through an adhesive. Since the flame retardance is conducted in a gradient progressive mode, wherein aluminum hydroxide plays a role in flame retardance at the temperature of 200 DEG C, when the temperature is still increased, zinc borate hydrate is subjected to thermal decomposition at the temperature of 300 DEG C, crystal water is released, andflame retardance is achieved. When the temperature is further increased, the magnesium hydroxide can achieve flame retardance at 340-490 DEG C, so that the flame retardance effect is improved throughcontinuous gradient progressive flame retardance.

Description

technical field [0001] The invention relates to the technical field of wood-plastic composite materials, in particular to a flame retardant and wood-plastic composite materials. Background technique [0002] Wood-plastic composite material is a new type of composite material that has been booming at home and abroad in recent years. It refers to the use of polyethylene, polypropylene, polyvinyl chloride, etc., instead of the usual resin adhesive, and mixed with waste plant fibers such as wood powder, rice husk, and straw. New wooden materials, and then plastic processing techniques such as extrusion, molding, injection molding, etc., to produce panels or profiles. Mainly used in building materials, furniture, logistics packaging and other industries. The board formed by hot extrusion after mixing plastic and wood powder in a certain proportion is called extruded wood-plastic composite board. PVC wood-plastic composite material is the main type of wood-plastic composite mate...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K3/22C08K3/38C08L27/06C08L97/02C08K13/06C08K3/26C08J9/10C08J9/08C08J3/20
CPCC08K9/10C08K3/22C08K3/38C08J9/103C08J9/08C08J3/20C08K2003/2227C08K2003/387C08K2003/2224C08J2327/06C08J2497/02C08J2203/02C08J2203/04C08K13/06C08K2003/265C08K3/013
Inventor 叶润露
Owner ANHUI KOJO NEW MATERIAL TECH CO LTD
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