A kind of micro-foamed polyethylene-based wood-plastic composite material and preparation method thereof

A wood-plastic composite material and polyethylene-based technology, which is applied in the field of composite materials and forestry engineering, can solve the problems of low density bending strength and impact toughness, poor impact toughness, and difficulty in foaming, and achieve good cell shape and impact. The effect of high toughness, easy cross-linking modification and blending modification

Active Publication Date: 2015-10-07
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies such as low bending strength, poor impact toughness and difficult foaming of the above-mentioned microfoamed polyethylene-based wood-plastic composite materials, the purpose of the present invention is to provide a kind of foam with good cell shape, high plant fiber content and low density. Micro-foamed polyethylene-based wood-plastic composite material with high bending strength and impact toughness and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Place 15 parts of talc powder and 10 parts of wollastonite powder in an oven at 100°C for 8 hours, put them into a high-speed mixer, stir and heat up to 90°C, and use ethanol with a volume concentration of 99% at a ratio of 1:2 Spray diluted silane coupling agent KH550 (silane coupling agent KH550 accounts for 2% of the total mass of talc powder and wollastonite powder), mix for 15 minutes, cool and unload to make modified filler; place wood flour in a 105°C Dry in oven for 10 hours. According to the mass ratio, 90 parts of low-density polyethylene, 10 parts of high-density polyethylene, modified filler, 1.5 parts of crosslinking agent, 1 part of lubricant, 2 parts of foaming agent, 1 part of antioxidant, 1 part of anti-ultraviolet agent, 1.5 parts of interfacial compatibilizer, 20 parts of wood powder, and 2 parts of pigment were put into a high-speed mixer, mixed for 25 minutes, cooled and unloaded, made into a premixed material, extruded and granulated, and the granu...

Embodiment 2

[0030]Place 10 parts of talc powder and 10 parts of wollastonite powder in an oven at 100°C for 8 hours, put them into a high-speed mixer, stir and heat up to 90°C, and use ethanol with a volume concentration of 99% at a ratio of 1:2 The diluted silane coupling agent KH550 (silane coupling agent KH550 accounts for 2% of the total mass of talc powder and wollastonite powder) is metered and sprayed, mixed for 15 minutes, cooled and unloaded to make a modified filler; place the bamboo powder at 105°C Dry in the oven for 10 hours. According to the mass ratio, 90 parts of low-density polyethylene, 10 parts of high-density polyethylene, modified filler, 1.5 parts of crosslinking agent, 1.5 parts of lubricant, 1 part of antioxidant, 1 part of anti-ultraviolet agent, 40 parts of bamboo powder, and interface Put 3 parts of compatibilizer and 2 parts of pigment into a high-speed mixer, mix for 25 minutes, cool and unload, make a premix and then extrude and granulate. The granulation tem...

Embodiment 3

[0032] Place 10 parts of talc powder and 10 parts of wollastonite powder in an oven at 100°C for 8 hours, put them into a high-speed mixer, stir and heat up to 90°C, and use ethanol with a volume concentration of 99% at a ratio of 1:2 Diluted silane coupling agent KH550 (silane coupling agent KH550 accounts for 2% of the total mass of talc powder and wollastonite powder) is metered and sprayed, mixed for 12 minutes, cooled and unloaded to make modified fillers; rice husk powder is placed in 105 °C oven for 10 hours. 90 parts by weight of low-density polyethylene, 10 parts of high-density polyethylene, modified filler, 1 part of crosslinking agent, 2 parts of lubricant, 1 part of antioxidant, 1 part of anti-ultraviolet agent, 60 parts of rice husk powder, Put 4 parts of interfacial compatibilizer and 2 parts of pigment into a high-speed mixer, mix for 30 minutes, cool and unload, make a premix and then extrude and granulate. The granulation temperature is 165°C and the granulat...

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Abstract

The invention discloses a micro-foaming polyethylene-matrix wood-plastic composite material and a preparation method thereof. The micro-foaming polyethylene-matrix wood-plastic composite material is prepared by the following steps of stirring a matrix polyethylene resin, modified wollastonite powder and talcum powder, a crosslinking agent, a lubricant, a heat balance type foaming agent, an antioxidant, an anti-ultraviolet agent, pigment and modified plant fiber, heating and uniformly mixing, then cooling and discharging to obtain a premix, wherein the modified plant fiber is one of wood powder, bamboo powder and rice hull powder or a mixture of two or more at any proportion; putting the premix into an extruder, and performing granulation, extrusion foaming and cooling formation. The micro-foaming polyethylene-matrix wood-plastic composite material disclosed by the invention is convenient to produce and manufacture, the raw materials are cheap and environment-friendly, the average diameter of the pores of the micro-foaming polyethylene-matrix wood-plastic composite material is reduced to 10 microns, and the content of the plant fiber is increased to 45%; moreover, the composite material has low density and high bending strength and impact toughness, is widely applicable and can be applied to the fields such as decoration, building, municipal administration, packaging, automotive upholsteries and the like.

Description

technical field [0001] The invention relates to a micro-foamed polyethylene-based wood-plastic composite material and a preparation method thereof, which belongs to the field of composite materials and also belongs to the field of forestry engineering. Background technique [0002] Compared with traditional wood-plastic composite materials, wood-plastic foam composite materials can not only reduce the density of the material due to the existence of cells, but also these bubbles can effectively prevent the expansion of the original cracks in the material and make the crack tip blunt, thus giving the material more Because of its excellent thermal stability and fatigue resistance, it has broad market prospects in architectural decoration, interior decoration, handicraft market, packaging and transportation, automotive interior parts and other fields. As a general-purpose plastic, polyethylene (PE) is cheaper than polypropylene (PP) and has better low temperature resistance; com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L97/02C08K13/06C08K9/06C08K9/04C08K3/34C08K7/10C08J9/10C08J3/24
CPCB29B9/06B29C48/92B29C2948/92561B29C2948/92704C08J9/0061C08J9/103C08J2203/04C08J2205/044C08J2323/06C08J2423/06C08J2497/02C08K2201/003C08K2201/016C08L23/06C08L2205/025C08L2205/035C08L2205/16C08L2207/062C08L2207/066C08L97/02C08K13/06C08K9/06C08K3/34C08K7/10
Inventor 周吓星陈礼辉黄六莲苏国基
Owner FUJIAN AGRI & FORESTRY UNIV
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