Graphite fiber sizing method and sizing device

A graphite fiber and sizing agent technology, which is applied in the direction of carbon fiber, fiber type, fiber treatment, etc., can solve the problems of unsuitable high-modulus brittle graphite fiber, uniform adhesion of unspecified sizing agent, and brittle fiber damage, etc., to achieve threading The operation process is convenient, easy to operate, and not easy to break

Pending Publication Date: 2022-03-25
辽宁诺科碳材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Chinese patent CN 104358050 A discloses a dipping sizing method, in which carbon fibers are dipped in a sizing tank, and then the excess sizing agent is squeezed out with a squeeze roller. This sizing method is not suitable for high modulus brittle graphite fibers. Especially when extruding excess sizing agent with squeeze rollers, which can cause damage to brittle fibers
[0009] Chinese patent CN104593965 discloses a spray sizing method that can be used for graphite fibers. This method avoids the problem that

Method used

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  • Graphite fiber sizing method and sizing device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0066] Example 1

[0067] The graphite fiber beam passes through the drive roller set 1 into the upper weight system, the process parameters in the upper slurry system are: the tension applied by the tension adjustment roller 2 is 400 cn, and the spray velocity of the shower 4, 5 is 1 m / s, the shower 8, 15 Spray velocity is 2 m / s, the material of the cleaning plate 7 and 10 is polytetrafluoroethylene plastic, and the airflow speed of the purge is 3 m / s, and the slurry agent is a water-soluble epoxy resin slurry, concentration of 2.5%. , The upper pulley circulating line heat exchanger uses a hot water heater, and the water temperature is 40 ° C, the upper slurry temperature is 25 ° C. The graphite fiber is introduced from the guide roller 12 and then enters the override drying furnace, from the upper weight drying furnace outlet, the amount of graphite fiber sample is 5 / m, and the bunch is 20%, and the fibrinicity is a grade.

Example Embodiment

[0068] Example 2

[0069] The graphite fiber beam passes through the drive roller set 1 into the upper slurry system, the process parameters in the upper slurry system are: 500 cn applied by the tension adjustment roller 2, the spray velocity of the shower 4, 5 is 1.2 m / s, the shower 8 15 spray velocity is 2 m / s, the material of the cleaning blade 7 and 10 is polytetrafluoroethylene plastic, and the airflow speed of the purge is 3 m / s, the slurry is a water-soluble epoxy resin lace, concentration 2.0 %, The upper pulley circulating line heat exchanger with hot water heater, water temperature is 40 ° C, and the upper slurry temperature is 25 ° C. The graphite fibers were introduced from the guide roller 12 to the upper tide drying furnace, and the amount of graphite fiber sample was taken from the upper weight drying furnace. The amount of graphite sample was 6 / m, the bunch of length was 22%, and the fibrinicity A level.

Example Embodiment

[0070] Example 3

[0071] The graphite fiber beam passes through the drive roller set 1 into the upper weight system, the process parameters in the upper slurry system are: 600 cn applied by the tension adjustment roller 2, the spray velocity of the shower 4, 5 is 1.5 m / s, the shower 8 15 spray speed is 2 m / s, the material of the cleaning plate 7 and 10 is polytetrafluoroethylene plastic, and the airflow speed of the purge is 3 m / s, the cement is a water-soluble epoxy resin lace, concentration 2.5 %, The upper pulley circulating line heat exchanger with hot water heater, water temperature is 40 ° C, and the upper slurry temperature is 25 ° C. The graphite fibers were introduced from the guide roller 12 to enter the upper tap drying furnace, and the amount of graphite fiber sample was taken from the upper tester drying furnace to test the amount of 3 / m, the bundling property was 18%, and the fibrinformation A level.

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Abstract

The invention discloses a graphite fiber sizing method and a sizing device, and relates to a graphite fiber sizing method, in particular to a sizing method for continuous graphite fibers prepared by taking mesophase pitch as a raw material. According to the invention, a high-modulus brittle graphite fiber sizing system is improved. The graphite fiber sizing device comprises a driving roller set 1, a tension adjusting control roller 2, a front guide roller 3, a front sizing roller 6, a rear sizing roller 9 and a rear guide roller 12 which are sequentially arranged from front to back, and a first front sizing agent sprayer 4 and a second front sizing agent sprayer 5 are arranged on the two sides between the front guide roller 3 and the front sizing roller 6. A first rear sizing agent sprayer 8 and a second rear sizing agent sprayer 15 are arranged on the two sides between the front sizing roller 6 and the rear sizing roller 9, and a first air purge device 11 and a second air purge device 14 are arranged on the two sides between the rear sizing roller 9 and the rear guide roller 12.

Description

Technical field [0001] The present invention relates to a slurry method of graphite fibers, and more particularly to a secondary graphite fiber having a continuous graphite fiber prepared in an intermediate phase asphalt as a raw material. Background technique [0002] The intermediate phase asphalt base (MPGF) is an intermediate phase asphalt as a raw material, a molten spinning, oxidation, carbonization, and graphitization process contains 99% or more, high graphitized special fibers, with a high mode The amount (high rigidity), high thermal conductivity, is widely used in aerospace, robot manufacturing, electronic device thermal management and other fields. Since the modulus of this fiber can be as high as 800 GPa, it is a brittle fiber that protects the continuity of production and requires special processes in the production process. [0003] Graphite fibers are often used as a reinforcing material of a resin-based composite, and the interfacial connection between graphite f...

Claims

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Application Information

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IPC IPC(8): D06B1/02D06B3/02D06B23/04D06M15/55D06M15/564D06M101/40
CPCD06B1/02D06B3/02D06B23/04D06M15/55D06M15/564D06B2700/27D06M2101/40D06M2200/40
Inventor 于杰董春岭姚远
Owner 辽宁诺科碳材料有限公司
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