Injection molding grade polypropylene wood-plastic micro-foaming composite material and preparation method thereof

A wood-plastic composite material and composite material technology are applied in the field of injection-molded polypropylene wood-plastic micro-foaming composite material and its preparation, which can solve the problem of poor compatibility between polypropylene and wood powder, low melt strength, and improve the dispersion of wood powder. and other problems, to achieve the effect of low cost, improved mechanical properties, and enhanced interfacial bonding force

Inactive Publication Date: 2018-06-19
ORINKO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention solves the defects such as low polypropylene melt strength and difficulty in encapsulating gas, which cause bubbles and string bubbles, and at the same time solves the poor compatibility between polypropylene and wood flour and improves the dispersion of wood flour. question

Method used

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  • Injection molding grade polypropylene wood-plastic micro-foaming composite material and preparation method thereof
  • Injection molding grade polypropylene wood-plastic micro-foaming composite material and preparation method thereof
  • Injection molding grade polypropylene wood-plastic micro-foaming composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The injection-grade polypropylene wood-plastic micro-foaming composite material in this embodiment is composed of the following raw materials according to weight percentage:

[0031] Polypropylene Wood Plastic Composite 98%

[0032] Sodium bicarbonate chemical foaming agent coated with LDPE 2%

[0033] The polypropylene wood-plastic composite material described therein consists of the following raw materials in parts by weight:

[0034]

[0035]

[0036] Concrete preparation method comprises the following steps:

[0037] (1) Weigh 96 parts of birch powder and 4 parts of dodecyltrimethoxysilane coupling agent into 100mL ethanol:water solution with a volume of 90:10, stir at room temperature for 10min, heat up to 50°C and stir for 24h, centrifuge Separation, washing with deionized water for 3 times, vacuum drying the centrifuged product at 50°C for 24 hours, grinding the dried product, and finally obtaining modified birch powder;

[0038] (2) Take by weighing 10 ...

Embodiment 2

[0041] The injection-grade polypropylene wood-plastic micro-foaming composite material in this embodiment is composed of the following raw materials according to weight percentage:

[0042] Polypropylene Wood Plastic Composite 97%

[0043] Sodium bicarbonate coated chemical blowing agent 3% by LDPE

[0044] The polypropylene wood-plastic composite material described therein consists of the following raw materials in parts by weight:

[0045]

[0046] Concrete preparation method comprises the following steps:

[0047] (1) Weigh 90 parts of poplar wood powder and 10 parts of hexadecyltrimethoxysilane coupling agent into 100 mL of ethanol: water solution with a volume of 90:10, stir at room temperature for 20 min, then raise the temperature to 55 ° C and stir for 36 h , centrifuged, washed 4 times with deionized water, vacuum-dried the centrifuged product at 60°C for 36 hours, and ground the dried product to finally obtain modified poplar wood powder;

[0048](2) Take by we...

Embodiment 3

[0051] The injection-grade polypropylene wood-plastic micro-foaming composite material in this embodiment is composed of the following raw materials according to weight percentage:

[0052] Polypropylene Wood Plastic Composite 97%

[0053] Sodium bicarbonate coated chemical blowing agent 3% by LDPE

[0054] The polypropylene wood-plastic composite material described therein consists of the following raw materials in parts by weight:

[0055]

[0056] Concrete preparation method comprises the following steps:

[0057] (1) Weigh 93 parts of poplar wood powder and 7 parts of hexadecyltrimethoxysilane coupling agent into 100 mL of ethanol:water solution with a volume of 90:10, stir at room temperature for 30 minutes, heat up to 60°C and stir for 48 hours at a constant temperature, Centrifuge, wash 5 times with deionized water, vacuum dry the centrifuged product at 80°C for 24-48 hours, grind the dried product, and finally obtain modified poplar wood powder;

[0058] (2) Take...

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Abstract

The invention provides an injection molding grade polypropylene wood-plastic micro-foaming composite material and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a polypropylene wood-plastic composite material and a chemical foaming agent according to a proper ratio and adding into an injection molding machine; carrying out injection molding byadopting secondary mold opening to prepare the polypropylene wood-plastic micro-foaming composite material, wherein the polypropylene wood-plastic composite material is prepared from 55 to 84 parts ofpolypropylene, 3 to 10 parts of high-branching-degree polypropylene, 3 to 5 parts of a compatilizer, 10 to 30 parts of modified wood flour, 0.2 to 0.4 part of an antioxidant, 0.5 to 1 part of a lubricant and 0 to 2 parts of other auxiliary agents. The polypropylene wood-plastic micro-foaming composite material provided by the invention has the characteristics of small density, high mechanical strength, low cost and the like; the polypropylene wood-plastic micro-foaming composite material is used as a novel environment-friendly material and can be used for replacing wood, and has wide application in the fields including building materials, packaging and transportation, an automobile industry and the like.

Description

technical field [0001] The invention belongs to the technical field of wood-plastic materials, in particular to an injection-grade polypropylene wood-plastic micro-foaming composite material and a preparation method thereof technical background [0002] In recent years, forest resources in the world have gradually decreased, and the supply of wood has been in short supply year by year. Wood-plastic composite materials are booming. , polyvinyl chloride (PVC) as the main raw material, prepared by extrusion, hot pressing, injection molding and other methods, combining the dual advantages of wood materials and thermoplastic polymers, has the advantages of beautiful appearance, low cost, anti-corrosion, and easy processing. In the fields of building materials, packaging and transportation, and automobile industry, as a new type of environmentally friendly material to replace wood, it has far-reaching social significance for solving the contradiction between the world's poor fores...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L97/02C08L51/06C08J9/08C08H8/00
CPCC08J9/0061C08H8/00C08J9/0085C08J9/009C08J9/08C08J2203/02C08J2323/12C08J2423/12C08J2423/14C08J2451/06C08J2497/02
Inventor 石阳阳周海夏洋李飞李荣群
Owner ORINKO NEW MATERIAL CO LTD
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