Integrated preparation process of big-tow carbon fiber spreading and curing

A tow carbon fiber and carbon fiber technology, which is applied in the field of integrated preparation of large tow carbon fiber widening and curing, can solve the problems of difficulty in widening large tow carbon fibers, high yarn utilization rate, and poor widening effect, etc. The effect of solving carbon fiber damage, high yarn utilization rate, and improving the effect of widening

Active Publication Date: 2018-04-13
北京方硕复合材料技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the large tow carbon fiber is difficult to widen, the present invention adopts the combination of special-shaped multi-rollers and angled rolls to spread-infiltrate-heating and curing integrated process. Solve the problem of poor wettability of large tow raw filaments due to poor spreading effect; the tow has no buckling and ply angle misalignment after spreading, and the fiber bundles are oriented in the fabric when using stretched carbon fibers for weaving Straight, less buckling, less interweaving points, high yarn utilization rate, lighter and thinner fabric, so that the composite member has the characteristics of light weight, high strength, high modulus; through controlling the tension during widening and adding coupling agent in time Protection, which solves the phenomenon of adhesion and yarn breakage of the original yarn during the stretching process

Method used

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  • Integrated preparation process of big-tow carbon fiber spreading and curing
  • Integrated preparation process of big-tow carbon fiber spreading and curing
  • Integrated preparation process of big-tow carbon fiber spreading and curing

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Embodiment 1

[0047] The integrated preparation process of large-tow carbon fiber spreading and curing includes the following steps:

[0048] (1) Precisely limit the carbon fiber precursor to ensure the neutrality of the carbon fiber precursor when it is stretched;

[0049] (2) After precise positioning, the carbon fiber precursors are spread, mainly through the combination of multiple special-shaped spreads and angle spreads to realize the spread of large tow carbon fibers. The specific process is: sequentially pre-spread by flat rollers, Convex roll widening, primary concave roll shaping, angle roll widening, secondary convex roll widening, secondary concave roll shaping, and flat roll widening complete the widening of carbon fiber precursors;

[0050] (3) Add coupling agent to the carbon fiber precursor to infiltrate before the carbon fiber precursor is widened;

[0051] (4) heating and solidifying the infiltrated carbon fiber precursor by traction through heating rollers;

[0052] (5) R...

Embodiment 2

[0058] refer to figure 2 , large tow carbon fiber widening and curing integrated preparation equipment, including: frame, carbon fiber guiding system, carbon fiber widening system, coupling agent adding system, traction heating curing system and receiving system, the frame is equipped with carbon fiber Guiding system, carbon fiber spreading system, couplant adding system, traction heating curing system and material receiving system, this preparation equipment is an equipment integrating spreading, infiltration and heating curing.

[0059] Wherein, the frame includes a short bed 2 and a long bed 31, and the short bed 2 and the long bed 31 are provided with feet 1 (the feet of the long bed 31 are not shown in the figure).

[0060] The carbon fiber guiding system precisely limits the carbon fiber precursor, specifically including a pre-limiting roller 4, a rough limiting roller 5, a first fine limiting wheel 6, a second fine limiting wheel 7, and a third fine limiting wheel 8. ...

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Abstract

The invention provides an integrated preparation process of big-tow carbon fiber spreading and curing, which comprises the following steps: a carbon fiber precursor is precisely limited to ensure theneutrality of the carbon fiber precursor when the fiber is spread; the carbon fiber precursor is spread after the precise limiting position, and then a coupling agent is added to permeate the carbon fiber precursor before the spreading process of the carbon fiber precursor is completed; a heat curing process is carried out by traction through a heating roller on the carbon fiber precursor after being permeated; a winding process is carried out; preparation devices are provided. The invention adopts an integrated preparation process of spreading--permeating--heat curing of combination of a special-shaped multiple-roller and an angle roller. The carbon fiber becomes obviously wider and thinner and more evenly arranged after the spreading process, which effectively solves the problem of poorpermeability of the big-tow carbon fiber precursor caused by the bad spreading effect. Furthermore, the phenomena of precursor adhesion, yarn breaking, buckling and lamination angle dislocation afterspreading can be overcome during the spreading process of the big-tow carbon fiber precursor.

Description

technical field [0001] The invention relates to an integrated preparation technology of large tow carbon fiber spreading and solidification. Background technique [0002] Carbon fiber and its composite materials have a series of excellent properties such as high specific strength, high specific modulus, fatigue resistance, and high temperature resistance. The demand for them in various industries of the national economy continues to increase, and their applications are becoming more and more widespread. Price is an important factor restricting the development and application of carbon fiber and its composite materials. Companies that produce carbon fiber are working to reduce the price of carbon fiber precursors, which account for about 60% of the cost of carbon fibers and their composite materials. Compared with small tow carbon fiber (1K, 3K, 6K) precursors, large tow carbon fiber (above 48K) precursors have the advantages of not degrading performance and not affecting the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02J1/18D01F9/12D06B1/00D06B15/00
CPCD01F9/12D02J1/18D06B1/00D06B15/00
Inventor 吴海宏朱登洁郭子月巴文兰李永喆李世超张正
Owner 北京方硕复合材料技术有限公司
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