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Wood plastic composite for injection and preparation method and application thereof

A wood-plastic composite material and a technology for injection, which is applied in the field of plastic-wood composite materials for injection and its preparation, can solve problems such as difficulty in satisfying injection processing, reduction of mechanical properties of composite materials, toughness, and deterioration of material flow properties, and achieve production The effect of fast speed, easy automatic production, and improved compatibility

Active Publication Date: 2010-05-12
广州市番禺区好友实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of a large amount of fibers to the wood-plastic composite material, not only the mechanical properties of the composite material, especially the toughness, are greatly reduced, but also the flow properties of the material are correspondingly deteriorated, which makes it difficult to meet the requirements of injection processing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of polypropylene three-monomer solid phase graft copolymer: 60 parts by weight of polypropylene (powder) and 40 parts by weight of monomer mixture (maleic anhydride, methyl methacrylate and Butyl acrylate is mixed at a mass ratio of 6:4:1), 1 part by weight of the initiator phthaloyl peroxide (BPO), and xylene is added as a surfactant; under the protection of nitrogen, the reaction is heated and stirred at a temperature of 120 After 2 hours of reaction at ℃, the product was washed with distilled water at 70℃, filtered with suction, and dried in an oven at 80℃ for 24 hours to obtain polypropylene three monomer solid phase graft copolymer;

[0024] (2) 40 parts by weight of waste thermoplastic polypropylene (PP) pellets (with a melt index of 6 g / 10 min under the conditions of 190° C. and 2160 g), 60 parts by weight of biomass fiber rice bran, 5 parts by weight of step (1) prepared Polypropylene tri-monomer solid phase graft copolymer, 5 parts by weight of oth...

Embodiment 2

[0031] (1) Preparation of polyethylene three-monomer solid phase graft copolymer: 60 parts by weight of high-density polyethylene (powder) and 40 parts by weight of monomer mixture (maleic anhydride, styrene and acrylic acid) were added to the stainless steel reactor. Butyl ester is mixed at a mass ratio of 5:5:1), 2 parts by weight of the initiator phthaloyl peroxide, and xylene is added as a surfactant at the same time; under the protection of nitrogen, the reaction is heated and stirred, and the temperature is 100°C. Reaction 3 After hours, the product was washed with distilled water at 60°C, filtered with suction, and dried in an oven at 70°C for 40 hours to obtain a polyethylene trimonomer solid phase graft copolymer;

[0032] (2) 60 parts by weight of high-density polyethylene (HDPE) (with a melt index of 10g / 10min under the conditions of 190℃ and 2160g), 40 parts by weight of wood flour, and 10 parts by weight of polyethylene termonomer solid phase graft copolymer , 0.5 pa...

Embodiment 3

[0039] (1) Preparation of polyethylene three monomer solid phase graft copolymer: Add 60 parts by weight of low-density polyethylene (powder) and 40 parts by weight of monomer mixture (AA, St and BA according to the mass ratio 5:5:1 mix), 1 part by weight of initiator azobisisobutyronitrile (AIBN), and xylene is added as a surfactant at the same time; under the protection of nitrogen, the reaction is heated and stirred at 100°C, after 2 hours of reaction , The product was washed with distilled water at 60°C, filtered with suction, and dried in an oven at 70°C for 40 hours to obtain a polyethylene trimonomer solid phase graft copolymer;

[0040] (2) 70 parts by weight of acrylonitrile-styrene-butadiene (ABS) pellets (with a melt index of 21g / 10min at 190°C and 2160g), 30 parts by weight of a mixture of orange stalk powder and rice bran (proportion 50 / 50), 7 parts by weight of polyethylene three monomer solid-phase graft copolymer, 10 parts by weight of modifier (SEBS / SIS=6 / 4), 1 p...

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Abstract

The invention discloses a wood plastic composite for injection and a preparation method and application thereof. The composite comprises the following components in part by weight: 30 to 70 parts of thermoplastic plastic for injection, 30 to 70 parts of biomass fiber, 5 to 10 parts of solid phase graft copolymer of polyolefin and monomers, and 0.5 to 4 parts of processing agent. The preparation method comprises the following steps of: premixing the components in a high-speed mixer; adding the mixture into a double-screw extruder to extrude; and cooling and granulating the mixture to obtain the wood plastic composite for injection. The wood plastic composite for injection can be directly used or mixed with plastics on a general injection machine for forming to prepare products in complicated shapes. The wood plastic composite for injection is high in production speed and efficiency, is easy to realize automation production, and can also obviously improve compatibility and interface bonding between the hydrophobic plastics and the hydrophilic biomass fiber; and performances such as modulus, strength, size stability, water resistance, processability and the like of the composite are obviously improved.

Description

Technical field [0001] The invention belongs to material preparation technology, and particularly relates to a plastic-wood composite material for injection and a preparation method and application thereof. Background technique [0002] In recent years, with the further expansion of the application field of polymer materials and the increasing awareness of environmental protection, biomass fibers such as wood flour, rice chaff, bamboo flour and straw have been combined with thermoplastics, especially waste thermoplastics (polyethylene, polypropylene, poly Wood plastic composite (WPC) made of styrene, ABS, etc. through plastic molding processing technology has attracted great attention. WPC has a wood-like appearance and secondary processing. It has better dimensional stability, corrosion resistance, insect resistance, moisture resistance, low formaldehyde emission, and higher hardness and rigidity than plastics than logs. Therefore, it is used in construction materials, municipal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/12C08L25/06C08L55/02C08L97/02C08L51/06B29B9/06B29C47/92B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/04B29C48/40B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 何慧贾德民
Owner 广州市番禺区好友实业有限公司
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