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Natural fiber filled polyethylene composite material and preparation method thereof

A technology of natural fibers and composite materials, applied in the field of polymer composite material preparation, can solve problems such as poor mechanical properties, and achieve the effects of excellent mechanical properties, good adjustability and good processing performance.

Inactive Publication Date: 2012-07-04
广东省石油化工研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects of the above-mentioned poor mechanical properties of WPC, the present invention provides a natural fiber-filled polyethylene composite material, and the composition of the natural fiber-filled polyethylene composite material includes:

Method used

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  • Natural fiber filled polyethylene composite material and preparation method thereof
  • Natural fiber filled polyethylene composite material and preparation method thereof
  • Natural fiber filled polyethylene composite material and preparation method thereof

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preparation example Construction

[0038] The present invention also proposes a method for preparing a natural fiber-filled polyethylene composite material, said method comprising the following steps:

[0039] Step 1: Measure the weight of the natural fiber powder, put it into a high-speed mixer, and stir at a speed of 2000r / min for 20-30 minutes;

[0040] Step 2: Add other ingredients in proportion, mix with each other for 10-20 minutes, and then put them into the co-rotating parallel twin-screw extruder;

[0041] Step 3: Carry out granulation, and extrude from the co-rotating parallel twin-screw extruder to obtain a natural fiber-filled polyethylene composite material.

[0042] The material obtained in step 3 is pellets.

[0043] The range of the stirring temperature T1 in the step 1 is: 100°C≤T1≤120°C.

[0044] The range of the granulation temperature T2 in the step 3 is: 160°C≤T2≤180°C.

Embodiment 1

[0046] Step 1: measure, put the measured natural natural fiber powder wood powder (80 mesh) into a high-speed mixer, heat to 100-120°C, and stir at 2000r / min for 20-30 minutes;

[0047] Step 2: Add high-density high-density polyethylene (MI=3), calcium carbonate, stearic acid-PEI condensate in proportion Zinc stearate and EBSwax, the preferred dosage is respectively 30% by weight, 6% by weight, 1.5% by weight, 1.5% by weight and 1% by weight, both mixing and stirring each other for 10-20 minutes, mixing The finished product after mixing is put into the co-rotating parallel twin-screw extruder;

[0048] Step 3: Carrying out granulation, the required temperature at this time is 160-180° C., and the granules of the natural fiber-filled polyethylene composite material are obtained under this temperature condition.

[0049] The pellets obtained in the step 3 are extruded by a conical screw, and can be made into profiled parts of various shapes.

Embodiment 2

[0051] Step 1: measure, put the measured natural natural fiber powder bamboo powder (100 mesh) into a high-speed mixer, heat to 100-120 ° C and stir at a speed of 2000 r / min for 20-30 minutes;

[0052] Step 2: Add high-density high-density polyethylene (MI=5), talcum powder, and lauric acid-PEI condensate in proportion Zinc stearate and EBSwax, described preferred consumption is respectively 25% weight ratio, 5% weight ratio, 2.5% weight ratio, 1.5% and weight ratio 1% weight ratio, promptly mixed each other and stirred 10-20 minute, mixed The finished product after mixing is put into the co-rotating parallel twin-screw extruder;

[0053] Step 3: Carrying out granulation, the required temperature at this time is 160-180° C., and the granules of the natural fiber-filled polyethylene composite material are obtained under this temperature condition.

[0054] The pellets obtained in the step 3 are extruded by a conical screw, and can be made into profiled parts of various shapes...

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Abstract

The invention provides a natural fiber filled polyethylene composite material and a preparation method thereof. The natural fiber filled polyethylene composite material comprises the following components by weight percent: 20-50% of high density polyethylene, 40-70% of natural fiber powder, 1-6% of fatty acid polyethylenimine condensation product, 1-15% of inorganic mineral filler and 1-6% of lubricating agent. The preparation method comprises the following steps: adding weighed natural fiber powder particles into a high-speed mixer, and stirring for 20-30 minutes at the speed of 2000r / min (revolutions per minute); adding other components in proportion, mutually mixing and stirring for 10-20 minutes, and then adding the mixture into a homodromous and parallel two-screw extruder; and pelleting to obtain the particles of the natural fiber filled polyethylene composite material. By using the preparation method, the defects that a common WPC (wood plastic composite) material is poor in mechanical property and poor in humidity resistance are solved.

Description

technical field [0001] The invention relates to the preparation technology of polymer composite materials, in particular to a high-performance natural fiber-filled polyethylene composite material and a preparation method. Background technique [0002] A new type of composite material that has been booming at home and abroad in recent years is made of polyethylene, polypropylene and polyvinyl chloride, etc., instead of ordinary resin adhesives, mixed with more than 50% of waste plant fibers such as wood powder, rice husk, straw, etc. Wood-plastic composite profiles (WPC for short) are produced by extrusion, molding, injection molding and other plastic processing techniques. WPC has five characteristics of diversified raw materials, environmentally friendly products, economical application and low-carbon regeneration, and is an ideal material for "lumber-saving logging". WPC not only has many advantages of plastic and wood, but also has other new features, such as: good proce...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L97/02C08L79/02B29C47/92B29B9/06B29C48/92
CPCB29C48/04B29C48/40B29C48/405
Inventor 李伟浩李华亮游瑞生洪仰婉陆云陈立星
Owner 广东省石油化工研究院
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