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A carbon fiber/thermoplastic fiber hybrid felt and its preparation method, and a carbon fiber reinforced thermoplastic resin matrix composite material

A thermoplastic fiber and carbon fiber technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve problems such as loss of quality and mechanical properties, easy shedding of carbon fibers, poor bonding of carbon fibers and resin interfaces, etc., to reduce loss and transportation costs, Excellent mechanical properties, improving the effect of difficult impregnation

Active Publication Date: 2021-04-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Carbon fiber-reinforced thermoplastic resin-based composites are generally prepared by hot-pressing carbon fiber / thermoplastic fiber mixed felts. The carbon fiber / thermoplastic fiber mixed felts currently used are mainly prepared by acupuncture reinforcement. In the process of needle punching reinforcement, the carbon fiber will be damaged by the metal parts, the mechanical properties of the final product cannot meet the higher requirements, and the interface between carbon fiber and resin in the composite material prepared by using needle punched fiber mat Poor bonding also leads to poor mechanical properties of the composite material; moreover, the thickness of the needle-punched fiber felt is relatively large and fluffy, which is not only unfavorable for handling, but the carbon fiber in the felt is also easy to fall off during use, losing a small amount of quality and mechanical properties, and causing damage to surrounding electrical appliances. create a threat

Method used

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  • A carbon fiber/thermoplastic fiber hybrid felt and its preparation method, and a carbon fiber reinforced thermoplastic resin matrix composite material
  • A carbon fiber/thermoplastic fiber hybrid felt and its preparation method, and a carbon fiber reinforced thermoplastic resin matrix composite material

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preparation example Construction

[0024] The invention provides a kind of preparation method of carbon fiber / thermoplastic fiber mixed felt, comprises the following steps:

[0025] Recycled carbon fiber and thermoplastic fiber are pre-opened separately, and the pre-opened recycled carbon fiber and thermoplastic fiber are mixed, followed by secondary opening, carding, cross-laying and thermal bonding reinforcement to obtain carbon fiber / thermoplastic fiber. Fiber mixed felt.

[0026] In the present invention, the recycled carbon fibers are specifically carbon fibers recovered from waste carbon fiber composite materials; the present invention uses recycled carbon fibers as raw materials, which can reduce production costs, and the carbon fiber surface slurry has been removed during the recycling process. In the present invention Among them, if it is necessary to sizing the carbon fiber, the sizing treatment can be carried out directly, and there is no need to clean the original sizing on the surface of the carbon...

Embodiment 1

[0046] Raw material: recycled carbon fiber, tensile modulus 230GPa, fiber length 50mm, density 1.8g / cm 3 ;Maleic anhydride modified polypropylene fiber, the fiber length is 50mm, the density is 0.9g / cm 3 .

[0047] Preparation steps:

[0048] 1) Preparation of carbon fiber / polypropylene fiber mixed felt (CF / PP fiber felt): pre-open recycled carbon fiber and maleic anhydride-modified polypropylene fiber, then mix them at a weight ratio of 40:60, and carry out secondary mixing after mixing. Secondary opening, obtain mixed fiber; Mixed fiber is carded (the carding machine of carding comprises chest cylinder, main cylinder, stripping roller, doffer, the first condensing roller and the second condensing roller; The carding machine The output side is provided with a take-up conveyor belt; set the speed of the doffer as Va, the speed of the first agglomeration roller as Vb, the speed of the second agglomeration roller as Vc, and the speed of the take-up conveyor belt as Vd, where V...

Embodiment 2

[0053] Raw material is consistent with embodiment 1.

[0054] Preparation steps:

[0055] 2) Preparation of carbon fiber / polypropylene fiber mixed felt (CF / PP fiber felt) Recycled carbon fiber and maleic anhydride modified polypropylene fiber are pre-opened, then mixed at a weight ratio of 40:60, and mixed for a second time Open to obtain mixed fiber; mixed fiber is carded (the carding machine of carding comprises chest cylinder, main cylinder, stripping roll, doffer, first condensing roll and second condensing roll; the output of described carding machine The side is provided with a take-up conveyor belt; the speed of setting the doffer is Va, the speed of the first agglomeration roller is Vb, the speed of the second agglomeration roller is Vc, and the speed of the take-up conveyor belt is Vd, wherein Va / Vb is 2.5, Vb / Vc is 2, Vc / Vd is 0.12), the carbon fiber is evenly dispersed in the thermoplastic synthetic fiber by carding, and the carbon fiber is entangled with the ther...

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Abstract

The invention relates to the technical field of reinforced resin composite materials, and provides a carbon fiber / thermoplastic fiber mixed felt, a preparation method thereof, and a carbon fiber reinforced thermoplastic resin-based composite material. The present invention uses non-woven technology to prepare mixed mats, and uniformly mixes carbon fibers and thermoplastic fibers through the steps of pre-opening, mixing, secondary opening, and carding. After cross-lapping, the thermoplastic fibers are melted and quickly Combining with carbon fiber improves the problem of difficult impregnation of thermoplastic resin in carbon fiber; the present invention prepares carbon fiber / thermoplastic fiber hybrid felt by thermal bonding and reinforcement, retains the original length of carbon fiber, reduces its damage, and the obtained mixed felt The thickness is greatly reduced; the carbon fiber reinforced thermoplastic resin matrix composite material with excellent mechanical properties can be prepared by using the mixed felt of the present invention. In the carbon fiber-reinforced thermoplastic resin-based composite material provided by the invention, the interfacial bonding between the carbon fiber and the resin is good, and the mechanical properties are excellent.

Description

technical field [0001] The invention relates to the technical field of reinforced resin composite materials, in particular to a carbon fiber / thermoplastic fiber and a preparation method thereof, and a carbon fiber reinforced thermoplastic resin-based composite material. Background technique [0002] Carbon fiber reinforced thermoplastic resin matrix composite material is a composite material with carbon fiber as reinforcing fiber and thermoplastic fiber as matrix. It has high specific strength and modulus and is widely used in medical equipment, wear-resistant mechanical parts, aerospace and other fields. . [0003] Carbon fiber-reinforced thermoplastic resin-based composites are generally prepared by hot-pressing carbon fiber / thermoplastic fiber mixed felts. The carbon fiber / thermoplastic fiber mixed felts currently used are mainly prepared by acupuncture reinforcement. In the process of needle punching reinforcement, the carbon fiber will be damaged by the metal parts, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/541D04H1/558
CPCD04H1/541D04H1/558D10B2101/12
Inventor 阳玉球杨阳邵元祎
Owner DONGHUA UNIV