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A kind of natural fiber reinforced thermoplastic resin unidirectional prepreg tape and its preparation method

A technology of thermoplastic resin and unidirectional prepreg tape, which is applied in the field of composite material production and preparation, can solve the problems of screw wear, limited reinforcement effect, and small fiber length and diameter of natural fiber reinforced materials, so as to ensure performance stability and porosity low effect

Active Publication Date: 2017-08-25
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The natural fiber reinforced material prepared by this method has a relatively small fiber length and diameter, and its reinforcing effect is limited; moreover, it has great wear and tear on the screw of the extruder

Method used

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  • A kind of natural fiber reinforced thermoplastic resin unidirectional prepreg tape and its preparation method
  • A kind of natural fiber reinforced thermoplastic resin unidirectional prepreg tape and its preparation method
  • A kind of natural fiber reinforced thermoplastic resin unidirectional prepreg tape and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) Weigh 30 parts of jute fiber, 70 parts of polypropylene fiber (polypropylene fiber), and 0.5 part of emulsion (in which mineral oil content is 20%, mother soap content is 0.9%, and water content is 79.1%), and Coupling agent vinyl trimethoxysilane 0.5 parts; use the conveyor belt 1 to transport the raw jute (ie: natural fiber raw material) 2 into the opener 3 for opening ( figure 1 ), in the process of opening, add emulsion and vinyl trimethoxysilane to open, and store it for 3 days;

[0065] (2) Spread the stocked jute and polypropylene fiber yarns (i.e. natural fibers after opening) 4 evenly, and send them to the first carding machine 5 to form a roll; then put the rolls into the second carding machine 6 In the second carding process, a jute fiber / polypropylene fiber mixed roll with a width of about 20mm is formed ( figure 2 );

[0066] (3) Put the jute fiber / polypropylene fiber mixed roll into the heating oven 7 for heating, and the heating temperature is 195°C;

[0...

Embodiment 2

[0069] (1) Weigh 60 parts of hemp fiber and 40 parts of polylactic acid fiber. The hemp fiber selected here is a commercially available strip, which is directly mixed with polylactic acid;

[0070] (2) Spread the hemp fiber and polylactic acid fiber evenly, and send them to the first carding machine 5 to form a roll; then put the rolls into the two-pass carding machine 6 for secondary carding to form a width of 30mm Left and right hemp fiber / polylactic acid fiber mixed roll;

[0071] (3) Put the hemp fiber / polylactic acid fiber mixed roll into the heating oven 7 for heating, and the heating temperature is 185°C;

[0072] (4) Then use the pressing roller 8 to roll the heated one-way prepreg tape of hemp fiber / polylactic acid fiber, and roll it again, the pressure is 8MPa, and then the rolled jute fiber / polypropylene fiber one-way The prepreg tape is wound by the winder 9. Obtain hemp fiber / polylactic acid fiber unidirectional prepreg tape. Its performance characteristics are shown ...

Embodiment 3

[0074] (1) Weigh 50 parts of ramie fiber and 50 parts of spandex fiber (polyurethane); the ramie fiber selected here is a commercially available strip, which is directly mixed with spandex fiber;

[0075] (2) Such as figure 2 As shown, the alkali-treated ramie fiber and spandex fiber are evenly laid out, in which 50 parts of ramie fiber and 50 parts of spandex fiber are sent to the first carding machine 5 to form a roll; then the roll is put into the second carding machine 6 During the carding process, the ramie fiber is relatively fine and the dispersion is uneven, so it is necessary to comb the ramie fiber / spandex fiber roll three times;

[0076] (3) Put the ramie fiber / spandex fiber mixed roll into the heating oven 7 for heating, and the heating temperature is 210°C;

[0077] (4) Then use the pressing roller 8 to roll the heated unidirectional prepreg tape of ramie fiber / spandex fiber. The rolling process is performed twice at a pressure of 2MPa, and then the rolled ramie fiber / ...

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Abstract

The invention belongs to the field of composite material production and preparation, and relates to a fiber reinforced thermoplastic resin unidirectional prepreg tape and a preparation method thereof. The prepreg tape is prepared from the following components, by weight: 30-70 parts of a thermoplastic resin, 30-70 parts of nature fibers, 0-1 part of a coupling agent, and 0-1 part of an emulsion. Compared with the prepreg tape in the prior art, the prepared nature fiber / thermoplastic resin unidirectional prepreg tape of the present invention has the following advantages and beneficial effects that: mechanical strength is high, the prepreg tape can be stored for a long time, the nature fibers are completely impregnated by the resin and are not exposed to the outside so as to maintain the dry state of the material, particularly the nature fibers, the nature fibers are not easily subjected to mildew deterioration, and the porosity is low so as to ensure performance stability of the product. With the method, the width of the reinforcing material and the nature fibers can be limited so as not to cause nature fiber deviation phenomenon during the subsequent production process.

Description

Technical field [0001] The invention belongs to the field of production and preparation of composite materials, and relates to a fiber-reinforced thermoplastic resin unidirectional prepreg tape and a preparation method thereof. Background technique [0002] Continuous fiber reinforced thermoplastic resin composite unidirectional prepreg tape has excellent mechanical properties, such as high tensile strength, flexural strength / modulus, high and low temperature impact strength, etc., and has relatively low density and recyclability. Therefore, in recent years, it has developed rapidly, and the corresponding preparation technology has also made major breakthroughs. [0003] In Chinese patent CN200610070280, Fang Kun uses a blended yarn method to prepare continuous glass fiber reinforced PP pellets. The composite blended yarn containing glass fiber is mixed with PP resin and processing aids, heated to melt and blended, and extruded by an extruder. Granulation. The product produced by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/06C08L67/04C08L67/02C08L75/04C08L97/02C08L89/00C08K5/098C08K5/01
CPCB29C70/504C08L1/02C08L23/06C08L23/12C08L75/04C08L2205/03C08L2205/035C08L2205/16C08L97/005C08K5/098C08L67/04C08L67/02
Inventor 刘密密
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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