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Carbon fiber bundle for winding molding and its preparation method and application

A technology of winding and forming carbon fiber bundles, applied in the field of carbon fiber

Active Publication Date: 2021-05-11
HENGSHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for the research on the influence of other states of carbon fiber bundles except strength on their conversion rate, no literature has clearly pointed out that

Method used

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  • Carbon fiber bundle for winding molding and its preparation method and application
  • Carbon fiber bundle for winding molding and its preparation method and application
  • Carbon fiber bundle for winding molding and its preparation method and application

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preparation example Construction

[0087] In the second aspect, the embodiment of the present invention provides a preparation method corresponding to the above-mentioned carbon fiber bundle for winding molding, including: soaking the pretreated carbon fiber bundle in a sizing agent for sizing, followed by drying at 125-145°C for 20-30s, and sizing to The fiber bundle tension in the drying process is controlled at 8-60mN / tex. Specifically include the following steps:

[0088] S1. Pretreating the fibers.

[0089] The fibers in the present application are polyacrylonitrile-based carbon fibers, pitch-based carbon fibers or viscose-based carbon fibers; ) is most suitable. The PAN-based carbon fiber here refers to the copolymer obtained by copolymerizing acrylonitrile as the main monomer with vinyl monomers such as itaconic acid, acrylic acid, and methyl acrylate in a molar ratio of less than 10% as a raw material, and is first prepared into PAN Raw silk, and then through a series of processes to obtain carbon fi...

Embodiment 1-6

[0103] Embodiment 1-6 provides a kind of carbon fiber bundle for winding molding, and its preparation method is as follows:

[0104] Use the PAN raw silk produced by Jiangsu Hengshen Company, carry out pre-oxidation treatment at 200-300°C in an air atmosphere; carry out carbonization treatment at a maximum temperature of 1350°C in a nitrogen atmosphere; Under the condition of surface anodic oxidation treatment, unsized HF30s carbon fiber (12000 single filaments, circular cross section, surface roughness Ra=39) without sizing is obtained, and it is continuously passed through the sizing agent bath (emulsion concentration 3%), After impregnation, heat rollers were used for contact drying. The surface temperature and drying time of the heat rollers and the tension during sizing and drying were shown in Table 1. The moisture in the fiber bundles was removed to obtain carbon fiber bundle products.

[0105] The components of the sizing agent include 20wt% of resin, 8wt% of emulsifie...

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Abstract

The invention discloses a carbon fiber bundle for winding molding, a preparation method and application thereof, and relates to the technical field of carbon fiber. The carbon fiber bundle for winding molding has a K value defined by the following formula between 6.5 and 8.5; K=L / D; wherein, L is the width of the fiber bundle, in mm, and L is 5.5-6mm; D is the fiber bundle The linear density, unit g / m. The preparation method comprises: placing the pretreated fiber in a sizing agent for dipping and sizing, and then drying at 125-145° C. for 20-30 seconds, and controlling the fiber bundle tension at 8-60 mN / tex during the process from sizing to drying. In this application, by limiting the ratio of the width of the fiber bundle to the linear density, the relative width can be limited, which can ensure a high degree of uniformity in cellulose impregnation and a good thickness uniformity of the molded body, so that the carbon fiber bundle can be placed on the mandrel. The top is closely arranged without gaps, can be quickly impregnated with resin, and has a high strength conversion rate.

Description

technical field [0001] The invention relates to the technical field of carbon fibers, in particular to a carbon fiber bundle for winding and forming, a preparation method and application thereof. Background technique [0002] Compared with other reinforcing fibers, carbon fiber has the characteristics of high strength, high modulus, and light weight. With the increase in carbon fiber production and the decline in cost in recent years, its application range has ranged from the initial aerospace field and high-end sports and entertainment fields. Rapidly expanded to automotive applications, wind power energy, pressure vessels, and building reinforcement in many industrial fields. Especially in recent years, with the policy tendency of countries around the world on new energy vehicles, in the field of pressure vessels, as gas storage tanks for new energy vehicle fuels such as natural gas and hydrogen, due to the high strength and light weight requirements for products, carbon f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06B3/02D06B15/00D06B23/02D06M15/55D06M15/564D06M15/53D06M13/224D06M101/40
CPCD06B3/02D06B15/00D06B23/028D06M15/55D06M15/564D06M15/53D06M13/224D06M2101/40D06M2200/40D06M13/17B29C53/582B29C53/602B29C70/10B29B15/08B29C70/32
Inventor 张淑斌杭传伟徐牛牛彭飞田磊陈明新
Owner HENGSHEN