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Moulding-grade wood-plastic composite and processing process

A wood-plastic composite material, injection molding technology, applied in the coating and other directions, can solve the problems of injection molding, single product shape, poor surface quality, etc., and achieves good molding performance, strong wood feeling, and high impact resistance. Effect

Inactive Publication Date: 2007-08-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problems that the current wood-plastic composite materials cannot be formed by injection molding and the existing wood-plastic composite materials have low strength, high brittleness, poor surface quality and single product shape.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Process

[0030] Process recipe

[0031] ① 100 parts by mass of regenerated PP;

[0032] ② 80 parts by mass of wood flour (100-200 mesh in particle size);

[0033] ③ Chlorinated polyethylene 5.0 parts by mass;

[0034] ④ 5.0 parts by mass of polyethylene wax;

[0035] ⑤ 1.0 parts by mass of stearic acid;

[0036] 6. Nanoscale calcium carbonate, aluminum hydroxide 4.0 parts by mass (ratio 1: 1) through coupling treatment;

[0037] ⑦15.0 parts by mass of dibutyl phthalate;

[0038] ⑧ The amount of maleic anhydride grafted polypropylene with a molecular weight of 0.5-30,000 is 15.0-18.0 parts by mass.

[0039] After the above materials are fully mixed at low speed (300-400 rpm), high speed (1500-1800 rpm), and low speed (400-500 rpm) for 5-6 minutes, 25-30 minutes, and 5-6 minutes, A composite material premix is ​​obtained. After being extruded and granulated by an extruder, special materials for injection molding wood-plastic composite materials can be obtaine...

Embodiment 2

[0051] (1) Process

[0052] Process recipe

[0053] ① regenerated PVC) 100 parts by mass;

[0054] ②Wood powder (particle size 100-200 mesh) 80-90 parts by mass;

[0055] ③ Chlorinated polyethylene 10.0 parts by mass;

[0056] ④ 0.5 parts by mass of polyethylene wax;

[0057] ⑤ 1.0 parts by mass of zinc stearate;

[0058] 6. 8.0 parts by mass (ratio 3: 1) of nanoscale calcium carbonate and aluminum hydroxide treated by coupling;

[0059] ⑦ Dioctyl phthalate 5.0 parts by mass;

[0060] ⑧ 20.0 parts by mass of maleic anhydride grafted polypropylene with a molecular weight of 0.5-30,000.

[0061] After the above materials are thoroughly mixed at low speed (500-600 rpm), high speed (2300-2500 rpm), and low speed (500-600 rpm) for 5-6 minutes, 25-30 minutes, and 5-6 minutes, the obtained Composite premixes. After being extruded and granulated by an extruder, special materials for injection molding wood-plastic composite materials can be obtained.

[0062] (2) Implementatio...

Embodiment 3

[0073] (1) Process

[0074] Process recipe

[0075] ① 100 parts by mass of regenerated HDPE;

[0076] ② 130 parts by mass of wood flour (100-200 mesh in particle size);

[0077] ③ 5 parts by mass of chlorinated polyethylene;

[0078] ④ 0.5 parts by mass of polyethylene wax;

[0079] 5.0 parts by mass of lead stearate;

[0080] 6. 4.0 parts by mass (ratio 1: 3) of nano-scale alumina and talcum powder treated by coupling;

[0081] ⑦ Dioctyl phthalate 15.0 parts by mass;

[0082] ⑧ 5.0 parts by mass of maleic anhydride grafted polyethylene with a molecular weight between 0.5 and 30,000.

[0083] After the above materials are thoroughly mixed at low speed (400-500 rpm), high speed (1700-1800 rpm), and low speed (400-500 rpm) for 5-6 minutes, 25-30 minutes, and 5-6 minutes, the obtained Composite premixes. After being extruded and granulated by an extruder, special materials for injection molding wood-plastic composite materials can be obtained.

[0084] (2) Implementation...

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Abstract

The invention relates to an injection moulding wood plastic compound material and the process technology. It is made up from recycled P or HDPE or PVC 100 portions, wood flour 80-130 portions, chlorinated polyethylene 5-10 portions, polyethylene wax 0.5-5.0 portions, geoceric acid or stearate 1.0-5.0 portions, nanometer reinforcing agent 4.0-8.0 portions, organic esters flexibilizer 5.0-15.0 portions, and PE grafted by maleic anhydride 5.0-20 portions. Mixing the materials at low speed (300-600round / min), high speed (1500-2500 round / min), low speed (300-600 round / min) for 5-10min, 25-40min, and 5-10min, the premixed material would be gained. After being extruded from extruder, the moulding wood plastic compound material would be gained. It could be widely used in producing complex shaped products.

Description

1. Technical field [0001] The invention relates to an injection-molded wood-plastic composite material and a processing technique, specifically an injection-molding-grade wood-plastic composite material and a processing technique. 2. Background technology [0002] At present, the molding process of wood-plastic composite materials at home and abroad mainly has the following two methods. [0003] 1. Extrusion molding [0004] The plastic particles, wood flour and additives are mixed and sent to the extruder for melt blending and extrusion molding. The product is generally a profile with a certain cross-sectional shape. [0005] 2. Molding [0006] The plastic particles are first mixed with wood powder and additives, and then sent to an extrusion granulator for granulation to prepare wood-plastic particles. Then the wood-plastic particles are filled into the closed mold, heated and pressurized to shape. The main problem is that it can only form plate products with simple ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08L27/06C08L97/02C08K9/04B29C45/00B29B9/12C08K3/00C08K5/12
Inventor 崔益华陶杰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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