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Plant fibre-polypropylene composite material and preparation thereof

A composite material and plant fiber technology, which is applied in the field of polymer material processing, can solve problems such as process and formula differences, and achieve the effects of reducing raw material costs, reducing production costs, and increasing proportions

Inactive Publication Date: 2007-07-25
倪斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the present invention has similarities with it, its method is still to use thermocompression molding technique, and its used plastics are mostly polyethylene or polyolefin compound, therefore have bigger difference with technique and prescription of the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Cotton rod fiber: 65

[0021] Polypropylene: 25

[0022] Talc: 3

[0023] EPDM: 3

[0024] Grafted maleic anhydride: 4.6

[0025] Antioxidant 1010: 0.4

[0026] The preparation method of the plant fiber polypropylene composite material of the above-mentioned embodiment 2 is to place the prepared raw materials of each component in a high-speed mixer in a solid state and fully mix them uniformly before adding them to the barrel of a twin-screw extruder. Melt blending is carried out under the temperature control of ~200 ℃, and then extruded through the die mouth, cooled by water to shape, and then pulled and cut to length to produce finished products.

[0027] The test data is as follows:

[0028] Test items

Embodiment 2

[0030] Straw fiber: 70

[0031] Polypropylene: 22

[0032] Calcium Carbonate Powder: 3

[0033] HDPE: 5

[0034] Grafted maleic anhydride: 2.8

[0035] Antioxidant 1010: 0.2

[0036] The preparation method of the plant fiber polypropylene composite material of the above-mentioned embodiment 2 is to place the prepared raw materials of each component in a high-speed mixer in a solid state and fully mix them uniformly before adding them to the barrel of a twin-screw extruder. Melt blending is carried out under the temperature control of ~200 ℃, and then extruded through the die mouth, cooled by water to shape, and then pulled and cut to length to produce finished products.

[0037] The test data is as follows:

[0038] Test items

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Abstract

The present invention provides a plant fibre polypropylene composite material and a process for producing same. The raw material components (parts by weight ) of the composite material comprises 50-80 parts of plant fibre, 18-50 parts of polypropylene, 1-10 parts of inorganic filler, 1-10 parts branched maleic anhydride, 1010:0.1-2 parts of anti-oxidant and 3-10 parts of other addition agents. The preparation method comprises the following steps: putting the prepared raw materials of each component in solid condition into a high speed mixing machine, thorough mixing them homogeneously, adding them into a charging barrel of a double-screw extruder, melting and blending them at a temperature controlled at 175-200 DEG C, extruding them through the mould port, shaping them through water cooling, dragging them and cutting them with a certain length, then the final product is worked out. In accordance with the present invention, by considerably improving the proportionality of plant fibre, the material cost of said composite materials is greatly reduced, and the unnecessary granulation working procedure further reduces the fabricating cost. The regulation of the proportioning of plant fibre and polypropylene is capable of satisfying requirements of materials with different usages.

Description

technical field [0001] The invention relates to a polymer composite material, in particular to a composite material made of plant straw fiber and polypropylene as main raw materials, and a one-step extrusion molding method adopted (that is, after mixing polypropylene and straw fiber powder, etc. directly carry out molding processing) and a preparation process method, belonging to the field of polymer material processing. Background technique [0002] Generally, polyethylene (PE) and wood fibers with lower melting points are mostly used in the manufacture of wood-plastic composite materials. The disadvantage is that the produced polyethylene-based wood-plastic composite materials have insufficient strength and low thermal deformation temperature. The production of high-strength polypropylene wood-plastic composite materials has been produced abroad, but its special formula and processing technology are not the same and are still in the confidential stage. There is no public f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K5/09C08J5/06B29C47/40B29C70/06
Inventor 倪斌
Owner 倪斌
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