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Wood-plastic composite material and prepration method thereof

A technology of wood-plastic composite materials and plastics, applied in the field of wood-plastic materials containing lignocellulose materials and its preparation, can solve the problems of weak strength and poor compatibility of wood-plastic composite materials, and achieve bending strength and impact strength Enhanced, increased compatibility, and resource-saving effects

Inactive Publication Date: 2010-04-28
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in the preparation process of the above-mentioned wood-plastic composite materials, only a compatibilizer is used to directly react wood powder and plastics, because wood powder is a polar polymer compound with a large number of polar groups on the surface, while plastics are A non-polar high molecular polymer, the compatibility between the two is poor, and the strength of the prepared wood-plastic composite material is weak. To obtain a high-strength wood-plastic composite material, a higher amount of plastic is required

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] 1. Prepare materials according to the following proportions by weight:

[0072] Modified Fiber Powder 70

[0073] HDPE 30

[0074] Maleic anhydride grafted polyethylene 4

[0075] Polyethylene Wax 6

[0076] Antioxidant 264 0.2

[0077] calcium carbonate 10

[0078] Ammonium Polyphosphate 2

[0079] Among them, the molecular weight of high density polyethylene (HDPE) is 40000-300000, and the density is 0.94g / cm 3 , the melt index (MI, g / 10min) is 0.35; the molecular weight of maleic anhydride grafted polyethylene is 10000-300000, the graft ratio is 1.5%, the melt index is 0.5g / 10min; the molecular weight of polyethylene wax is 2500-3000, Density 0.92g / cm 3 , the viscosity is 0.8Pa·s (140℃); the nitrogen content of ammonium polyphosphate is 23%, and the phosphorus content is ≥20%.

[0080] Wherein, the modified fiber powder is prepared according to the following steps:

[0081] A. After the poplar is pulverized into 40 mesh wood powder with a wood flour machine ...

Embodiment 2

[0092] 1. Prepare materials according to the following proportions by weight:

[0093] Modified Fiber Powder 65

[0094] Polypropylene 35

[0095] Maleic anhydride grafted polypropylene 5

[0096] Stearic acid 6

[0097] Antioxidant 264 0.1

[0098] Antioxidant 1010 0.1

[0099] calcium carbonate 10

[0100] Octabromoether flame retardant 2

[0101] Wherein, the molecular weight of the polypropylene (PP) is 10000-300000, the melt index (MI, g / 10min) is 0.4; the molecular weight of the maleic anhydride grafted polypropylene is 12000-300000, the graft ratio is 2%, Melt index 0.6g / 10min.

[0102] Wherein, the modified fiber powder is prepared according to the following steps:

[0103] A. After the masson pine wood is pulverized into 100 mesh wood powder by a wood powder machine, the wood powder is placed in a desiccator and dried at 105 ° C to obtain dry pine fiber powder, wherein the moisture content of the dry pine fiber powder is 5% ;

[0104] B, dry wood powder and li...

Embodiment 3

[0109] 1. Prepare materials according to the following proportions by weight:

[0110] Modified fiber powder 80

[0111] PVC 20

[0112] Rare Earth Composite Stabilizer 5

[0113] Stearic acid 3

[0114] Rosin 3

[0115] Chlorinated polyethylene 6

[0116] Antioxidant 264 0.1

[0117] Antioxidant 1010 0.2

[0118] calcium carbonate 10

[0119] Chlorinated paraffin flame retardant 2.5

[0120] Wherein, the molecular weight of the polyvinyl chloride (PVC) is 30000-100000, the melt index (MI) is 0.8g / 10min; the molecular weight of the chlorinated polyethylene is 10000-300000, and the chlorine content is 40%; The molecular weight is 1060-1100, and the chlorine content is 70%; the rare earth metal content in the rare earth composite stabilizer is more than 10%, the moisture content is less than 2%, and the particle size is more than 200 mesh.

[0121] Wherein, the modified fiber powder is prepared according to the following steps:

[0122] A. After pulverizing Chinese fir...

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Abstract

The invention discloses a wood-plastic composite material and a preparation method thereof, and the wood-plastic composite material comprises the following raw materials according to the mixing ratio by parts by weight: 30-80 parts of modified fiber powder; 15-80 parts of plastics; 2-10 parts of phase solvent; 2-10 parts of lubricant; 0-10 parts of stabilizer; 0.2-1.0 part of antioxidant; 5-15 parts of filler; and 2-20 parts of flame retardant. Lignin is utilized for modifying fiber powder, then composition with the plastics is carried out, and a finished-product material is formed by extrusion. The preparation method can solve the problems of the compatibility of wood fibers with the thermoplastic plastics, the surface treatment technology of the raw materials by utilizing the lignin and the like, realize the comprehensive utilization of the lignin and the waste plastics, be capable of replacing wood, increase the additional value of the lignin and solve the utilization problem of the lignin wastes. The manufactured wood-plastic composite material can significantly improve the mechanical performance, the tensile strength, the flexural strength and the impact resistance, and realize the industrial production of high-performance products, such as construction materials.

Description

technical field [0001] The invention relates to a composition containing lignin material and a preparation method thereof, in particular to a wood-plastic material containing lignocellulose material and a preparation method thereof. Background technique [0002] Wood-plastic composite material is a new type of engineering material, which is made of wood fiber and plastic as the main raw materials. As a wood-plastic composite material, it has excellent water resistance and corrosion resistance, insect resistance, good dimensional stability, flexible production process, and little damage to equipment. It can also be made from recycled waste wood and plastic as raw materials, and can be recycled. It has attracted much attention due to its advantages in use. [0003] However, because wood fiber and plastic are two kinds of polymers with different properties, the compatibility of untreated wood fiber and plastic is poor, and the combination of plastic and plant fiber is poor, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L23/06C08L51/06C08K3/26C08K3/32C08L23/12C08L27/06C08L93/04C08L55/02C08K3/22
Inventor 樊永明李建章梅超群
Owner BEIJING FORESTRY UNIVERSITY
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