Fibrilia for plastic reinforcing and method for manufacturing the same

The technology of hemp fiber and jute fiber is applied in the field of hemp fiber for plastic reinforcement and its preparation. Good rigidity and heat resistance

Inactive Publication Date: 2011-11-02
BILIC FORTUNE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coupling agents mostly use less liquid and are not easy to disperse evenly into plant fibers, which affects their coupling effect. Industrial applications require special equipment for processing; most grafts or copolymers of maleic anhydride and polyolefin are particles It is easy to disperse into plastics and plant fibers, but its low grafting rate makes it difficult to improve interfacial adhesion
However, composites filled with a large amount of plant fibers and plastics also pose processing difficulties, making extrusion or injection molding difficult
In order to solve the processing problems of plant fiber and plastic composite materials, various processing aids appear, such as olefin wax, amide wax, stearic acid, zinc stearate, calcium stearate, etc., but the addition of too many processing aids It will also degrade the performance of the composite material

Method used

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  • Fibrilia for plastic reinforcing and method for manufacturing the same
  • Fibrilia for plastic reinforcing and method for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) 100 parts by weight of ramie fibers are cut to 1-20 mm to obtain chopped hemp fibers; the chopped hemp fibers are soaked in aqueous sodium hydroxide solution (1% by mass concentration) and stirred for 20 minutes, then rinsed with water To pH 7.0, centrifuged to dry the water, then soaked in the temperature of 80 ℃ hemp fiber treatment agent (80 parts by weight of urea-formaldehyde resin prepolymer) aqueous solution (mass percentage concentration is 30%) for 30min, the hemp fiber After exhausting the aqueous solution of the hemp fiber treatment agent, vacuum drying at a temperature of 110°C until the moisture content of the hemp fiber mass is less than 1%, to obtain surface-treated chopped hemp fibers;

[0024] (2) with surface-treated chopped hemp fiber, 2 parts by weight of silane coupling agent, 9 parts by weight of functional polyolefin (5 parts by weight of metallocene polyethylene wax and 4 parts by weight of metallocene polyolefin wax-maleic anhydride Graft mi...

Embodiment 2

[0026] (1) Cut 100 parts by weight of flax fibers to 1-20 mm to obtain chopped hemp fibers; soak and stir the chopped hemp fibers in aqueous sodium hydroxide solution (10% by mass) for 2 minutes, then rinse with water To pH 9.0, centrifuged to dry the water, then soaked in the hemp fiber treatment agent (90 parts by weight of trimethylol melamine resin) aqueous solution (mass percentage concentration is 20%) at a temperature of 90 ℃ for 30min, until the hemp fiber is exhausted After the hemp fiber treatment agent aqueous solution, adopt the temperature 150 ℃ of vacuum drying to the hemp fiber moisture content is less than 1%, obtain the chopped hemp fiber through surface treatment;

[0027] (2) With surface-treated chopped hemp fiber, 8 parts by weight coupling agent (4 parts by weight titanate coupling agent mixed with 4 parts by weight rare earth coupling agent), 4 parts by weight functional polyolefin (2 parts by weight Part metallocene polypropylene mixed with 2 parts by w...

Embodiment 3

[0029] (1) 100 parts by weight of sisal fibers are cut to 1 to 20 mm to obtain chopped hemp fibers; the chopped hemp fibers are soaked and stirred in aqueous sodium hydroxide solution (5% by mass) and then rinsed with clear water Rinse to pH 8.0, centrifugally dry the water, then soak in the hemp fiber treatment agent (100 parts by weight of hexamethylol melamine resin) aqueous solution (10% by mass concentration) at a temperature of 85°C for 20 minutes, and treat the hemp fiber After exhausting the aqueous solution of the hemp fiber treatment agent, vacuum drying at a temperature of 120°C until the moisture content of the hemp fiber mass is less than 1%, to obtain surface-treated chopped hemp fibers;

[0030] (2) With surface-treated chopped hemp fiber, 7 parts by weight of coupling agent (5 parts by weight of aluminate coupling agent and 2 parts by weight of isocyanate coupling agent), 7 parts by weight of functional polyolefin (5 parts by weight of Metallocene polyolefin an...

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Abstract

The present invention discloses a fibrilia for plastic reinforcing and a method for manufacturing the same. The fibrilia contains the following components in part by weight: 100 chopped fibrilias, 0.1 to 100 fibrilia agents, 1 to 10 functional polyolefins, 0.1 to 10 coupling agents and 0.1 to 0.5 antioxygens. The method comprises the steps of: cutting off the chopped fibrilias; immersing the cut chopped fibrilias into a sodium hydroxide solution and stirring the solution; washing out the chopped fibrilias after taking out them from the solution; drying the obtained chopped fibrilias; then immersing the dried chopped fibrilias into solution with the fibrilia agents; drying to obtain the chopped fibrilias with surface treatment; adding the chopped fibrilias, the coupling agents, the functional polyolefins and the antioxygens into a preheated kneader in order; and stirring to obtain the fibrilia for plastic reinforcing. The chopped fibrilias manufactured by the present invention has goodcolor, good rigidity, good heat resistance, and good compatibility with the plastic, thus the chopped fibrilias can be used for manufacturing chopped fibrilias / plastic composite materials with high performance, and can play a reinforcing role in plastic substrates.

Description

technical field [0001] The invention belongs to the technical field of natural fiber composite materials and wood-plastic composite materials, and specifically refers to a hemp fiber for plastic reinforcement and a preparation method thereof Background technique [0002] In recent years, research on natural plant fiber composites and wood-plastic composites is in the ascendant. On the one hand, due to the wide range of sources of natural plant fibers, the price is low; on the other hand, in terms of performance, natural plant fiber-reinforced plastics tend to replace mineral fiber-reinforced plastics. [0003] Most natural plant fibers are made of long fibers or woven into fiber mats and then hot-pressed with thermosetting resins. They cannot be directly added to thermoplastics for injection molding like glass fibers; on the one hand, natural plant fibers are rich in hydroxyl groups on the surface , shows strong polarity and hydrophilicity, has poor compatibility with non-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08L97/02C08L23/00C08L23/06C08L23/12C08L23/30C08L51/06C08J5/06D06M15/423D06M101/06
CPCC08L97/02B29B15/08Y10T428/2933C08L61/24C08L91/06C08L61/28D06M11/01D06M11/38D06M11/46D06M15/19
Inventor 马铁军李及珠郭修芹廖宇涛董平
Owner BILIC FORTUNE TECH
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