Preparation method for flax fiber wood plastic PP composite material

A technology of flax fiber and composite materials, which is applied in the field of wood-plastic PP composite materials, can solve the problems of uneven dispersion and high internal stress of parts, and achieve the effects of uniform fiber dispersion, improved dispersion, good rigidity and toughness

Inactive Publication Date: 2018-01-12
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention adds liquid paraffin to improve the dispersibility of the flax fiber, so that the performance of the prepared composite material is uniform and stable, thereby solving the cause of excessive internal stress in the workpiece due to uneven dispersion in the composite material, and better satisfying the use of materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 80 parts of polypropylene and 5 parts of liquid paraffin, add to high mixer, and mix for 2 minutes;

[0026] (2) Flax fiber pretreatment, drying at 80 degrees Celsius for 4 hours. Weigh 10 parts of flax fiber, add it to the high-mixer described in step (1), and mix it for 3 minutes; continue to add 3 parts of compatibilizer and 2 parts of coupling agent, mix it for 3 minutes, and take it out for use;

[0027] (3) Put the material obtained in step (2) into a twin-screw extruder, and granulate under the technological conditions of 170-190°C, rotating speed 260-300, main feeding frequency 7-9, and side feeding frequency 0 to prepare this product. Invention of the described wood-plastic polypropylene.

[0028] The test results are as follows:

[0029] Charpy notched impact strength (KJ / m 2 ) [DIN EN ISO 179-1:2010]: 4.7;

[0030] Charpy unnotched impact strength (KJ / m 2 ) [DIN EN ISO 179-1:2010]: 18.6;

[0031] Izod beam unnotched impact strength (KJ / m 2 ) ...

Embodiment 2

[0036] (1) Weigh 80 parts of polypropylene and 5 parts of liquid paraffin, add to high mixer, and mix for 2 minutes;

[0037] (2) Flax fiber pretreatment, drying at 80 degrees Celsius for 4 hours. Weigh 20 parts of flax fiber, add it to the high-mixer described in step (1), and mix it for 3 minutes; continue to add 3 parts of compatibilizer and 2 parts of coupling agent, mix it for 3 minutes, and take it out for use;

[0038] (3) Put the material obtained in step (2) into a twin-screw extruder, and granulate under the technological conditions of 170-190°C, rotating speed 260-300, main feeding frequency 7-9, and side feeding frequency 0 to prepare this product. Invention of the described wood-plastic polypropylene.

[0039] The test results are as follows:

[0040] Charpy notched impact strength (KJ / m 2 ) [DIN EN ISO 179-1:2010]: 5.0;

[0041] Charpy unnotched impact strength (KJ / m 2 ) [DIN EN ISO 179-1:2010]: 15.8;

[0042] Izod beam unnotched impact strength (KJ / m 2 ) ...

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Abstract

The invention relates to a preparation method for a wood plastic PP composite material. Flax fibers modify PP through a melt extrusion process, so the wood plastic PP composite material is formed. Thewood plastic PP composite material comprises the following raw materials by weight: 80 parts of polypropylene, 20 parts of the flax fibers, 0 to 12 parts of a compatilizer, 0 to 3 parts of a couplingagent and 3 to 6 parts of liquid paraffin. The preparation method comprises the following steps: blending the raw materials with a double-screw extruder and subjecting an extruded material strip to cooling with cooling water, drying, granulation and packaging successively. According to the invention, the flax fibers modify PP through the melt extrusion process, so the wood plastic PP composite material is prepared.

Description

technical field [0001] The invention belongs to the field of PP biological plastics, and relates to modifying PP with flax fiber to obtain a wood-plastic-PP composite material. Background technique [0002] Flax fiber modified polypropylene can not only improve the mechanical properties of polypropylene, but also reduce the cost. [0003] Natural hemp fiber can partially replace glass fiber, and carbon fiber is used to reinforce and modify polypropylene. The difference is that glass fiber is man-made, its preparation method is complicated, and it will pollute the nature; while natural hemp fiber is a green, environmentally friendly natural resource and a sustainable resource. [0004] Flax fiber is extracted from plants with high fiber content through multiple steps, and has excellent effects such as high strength and multi-void sound insulation. If the polypropylene material is modified, the performance of the polypropylene material can be improved. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L1/02C08L91/06C08L51/06B29C47/92B29C48/92
Inventor 王贺崔成杰谢众
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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