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Injection microcellular foamed wood-plastic composite material and preparation method thereof

A wood-plastic composite material, injection foaming technology, applied in the direction of coating, can solve the problems of poor dispersion and uneven distribution of cells, and achieve the effect of high strength and toughness, and low cost

Inactive Publication Date: 2011-02-02
JIANGSU HENGFAMU PLASTIC SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some nucleating agents are poorly dispersed in the matrix resin, resulting in uneven distribution of cells. How to solve these problems to optimize the process conditions of micro-foamed wood-plastic composites and realize the industrialization of micro-cellular foaming is very important. significance

Method used

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  • Injection microcellular foamed wood-plastic composite material and preparation method thereof
  • Injection microcellular foamed wood-plastic composite material and preparation method thereof
  • Injection microcellular foamed wood-plastic composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) Process

[0065] Process recipe

[0066] 1. Wood plastic pellets

[0067] ① 30.0 parts by mass of wood flour with a particle size of 120-180 mesh;

[0068] ② Regenerated PP 70.0 parts by mass;

[0069] ② 4.0 parts by mass of zinc stearate;

[0070] ③ 6.0 parts by mass of PP grafted with maleic anhydride with a molecular weight of 1.0 to 15,000;

[0071] ⑤ 1.5 parts by mass of titanate coupling agent;

[0072] ⑥ 10.0 parts by mass of nano-calcium oxide;

[0073] 7. 1.5 parts by mass of nano zinc oxide;

[0074] ⑧ 1.0 parts by mass of superfine talcum powder;

[0075] 2. Foam masterbatch

[0076] ①LDPE 75.0 parts by mass;

[0077] ② 10.0 parts by mass of ethylene-vinyl acetate copolymer;

[0078] ③ 5.0 parts by mass of azodicarbonamide;

[0079] ④ 1.0 parts by mass of stearic acid;

[0080] Mix the wood powder, nano-adsorbent and ultra-fine talcum powder at high speed (1800-2000 rpm) for 10-15 minutes, add titanate coupling agent and then mix at high speed...

Embodiment 2

[0097] (1) Process

[0098] Process recipe

[0099] 1. Wood plastic pellets

[0100] ① 40.0 parts by mass of wood flour with a particle size of 120-160 mesh;

[0101] ② Regenerated PP 60.0 parts by mass;

[0102] ③ 3.0 parts by mass of stearic acid;

[0103] ④ 8.0 parts by mass of maleic anhydride grafted PP with a molecular weight between 2.5 and 3.0;

[0104] ⑤ 2.0 parts by mass of titanate coupling agent;

[0105] ⑥ 5.0 parts by mass of nano-calcium oxide;

[0106] ⑦Nano zinc oxide 1.0 parts by mass;

[0107] ⑧ 1.5 parts by mass of superfine talcum powder.

[0108] 2. Foam masterbatch

[0109] ①LDPE 82.5 parts by mass;

[0110] ② 5.0 parts by mass of ethylene-vinyl acetate copolymer;

[0111]③ 15.0 parts by mass of azodicarbonamide;

[0112] ④ 1.5 parts by mass of stearic acid;

[0113] Mix wood powder, nano-adsorbent and ultra-fine talcum powder at high speed (1500-1700 rpm) for 10-15 minutes, add titanate coupling agent and then mix at high speed (1500-1700 rp...

Embodiment 3

[0130] (1) Process

[0131] Process recipe

[0132] 1. Wood plastic pellets

[0133] ① 50.0 parts by mass of wood flour with a particle size of 160-200 mesh;

[0134] ② Regenerated PP 50.0 parts by mass;

[0135] ③ 5.0 parts by mass of stearic acid;

[0136] ④ 10.0 parts by mass of PP grafted with maleic anhydride with a molecular weight between 25,000 and 30,000;

[0137] ⑤ 1.0 parts by mass of titanate coupling agent;

[0138] ⑥ 7.5 parts by mass of nano calcium oxide;

[0139] ⑦Nano zinc oxide 1.0 parts by mass;

[0140] ⑧ 1.0 parts by mass of superfine talcum powder.

[0141] 2. Foam masterbatch

[0142] ①LDPE 90.0 parts by mass;

[0143] ② 7.5 parts by mass of ethylene-vinyl acetate copolymer;

[0144] ③ 10.0 parts by mass of azodicarbonamide;

[0145] ④ 0.5 parts by mass of stearic acid;

[0146] After mixing the wood powder, nano-adsorbent and ultrafine talc powder at high speed (2200-2400 rpm) for 15 minutes, add titanate coupling agent and then mix at high...

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Abstract

The invention discloses an injection microcellular foamed wood-plastic composite material and a preparation method thereof. The composite material comprises wood-plastic pellets and foaming master batches, wherein the wood-plastic pellets contain the following components: wood powder with the granularity of 100-200 meshes, regenerated polypropylene (PP), stearic acid or salt thereof, maleic anhydride grafted PP with the molecular weight of 5,000-30,000, titanate coupling gent, nano absorbent, nano assistant foaming agent and super-micro nucleating agent; and the foaming master batches containthe following components: low-density polyethylene (LDPE), vinylacetate copolymer, azodicarbonamide, and stearic acid or salt thereof. The preparation method comprises the following steps of: preparing the wood-plastic pellets and the foaming master batches, mixing in a ratio of 15:4-17:4, injecting and foaming to prepare the injection microcellular foamed wood-plastic composite material. The composite material has the characteristics of light weight, high strength and toughness, low cost and the like, can widely replace the plastics, and is used for the production of the products with complicated shapes.

Description

technical field [0001] The invention relates to an injection-molded microfoaming wood-plastic composite material and a preparation method thereof. Background technique [0002] At present, the molding process of micro-foamed wood-plastic composite materials at home and abroad mainly has the following three methods. [0003] 1. Solid state batch molding [0004] In the first stage, the polymer is placed in a pressure vessel filled with high pressure inert gas. This stage is usually carried out in a room temperature environment. After a certain period of time, the gas diffuses into the polymer, resulting in a uniform concentration throughout the sample. When the sample is transferred from the pressure vessel to atmospheric pressure, this supersaturated sample becomes thermodynamically unstable due to the excess gas dissolved in the polymer. In the second stage, the supersaturated sample is heated above the glass transition temperature (Tg) of the polymer / gas mixture, known...

Claims

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Application Information

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IPC IPC(8): C08J3/22B29C45/00C08K5/098C08L51/06C08K3/34C08L23/06C08L23/08C08L23/12C08K5/09C08J9/10C08K3/22C08L97/02C08K13/02
Inventor 崔益华谢博陈超王鑫鑫张慧慧陈银福蔡鹤林陶杰
Owner JIANGSU HENGFAMU PLASTIC SCI & TECH
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