A sizing method for high-strength and high-modulus silicon carbide fibers

A high-modulus silicon carbide and silicon carbide fiber technology, which is applied in fiber processing, textiles and papermaking, etc., can solve the problems of unsuitable sizing agent, easy hair, breakage, etc., to avoid frequent brittle fracture, soft friction conditions, The effect of reducing complexity

Active Publication Date: 2022-07-29
SHAANXI YUANFENG TEXTILE TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a sizing method for high-strength and high-modulus silicon carbide fibers, which solves the problems in the prior art that silicon carbide fibers are prone to hair and breakage during the sizing process, and the sizing agent is not suitable

Method used

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  • A sizing method for high-strength and high-modulus silicon carbide fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A sizing method for high-strength and high-modulus silicon carbide fibers, the workshop temperature is 25°C, the workshop humidity is 60% to 70%, and the vehicle speed is 30m / min; the temperature of the size tank 7 is set to 25°C.

[0046] (1) Sizing agent deployment

[0047] The deionized water, the epoxy resin slurry and the hydrophilic softener are mixed and stirred evenly in a mass ratio of 28:6:3 to obtain a sizing agent, and the solid content of the sizing agent is 8%, and is ready for use;

[0048] The epoxy resin paste is MU series paste with a solid content of 50%; the hydrophilic softener is silicone or glycerin;

[0049] (2) Pre-drying

[0050] Turn on the hot air dryer, raise the temperature to 120°C, and maintain a constant temperature;

[0051] (3) Sizing

[0052] The silicon carbide fiber 8 is wound on the bobbin 9, enters the sizing tank 7 through the sizing roller 6, and pours the sizing agent into the sizing tank 7 to perform sizing treatment on a s...

Embodiment 2

[0058] A sizing method for high-strength and high-modulus silicon carbide fibers, the workshop temperature is 25°C, the workshop humidity is 60% to 70%, and the vehicle speed is 30m / min; the temperature of the size tank 7 is set to 25°C.

[0059] (1) Sizing agent deployment

[0060] The deionized water, the epoxy resin slurry and the hydrophilic softener are mixed and stirred evenly in a mass ratio of 28:6:3 to obtain a sizing agent, and the solid content of the sizing agent is 8%, and is ready for use;

[0061] The epoxy resin paste is MU series paste with a solid content of 50%; the hydrophilic softener is silicone or glycerin;

[0062] (2) Pre-drying

[0063] Turn on the hot air dryer, raise the temperature to 120°C, and maintain a constant temperature;

[0064] (3) Sizing

[0065] The silicon carbide fiber 8 is wound on the bobbin 9, enters the sizing tank 7 through the sizing roller 6, and pours the sizing agent into the sizing tank 7 to perform sizing treatment on a s...

Embodiment 3

[0071] A sizing method for high-strength and high-modulus silicon carbide fibers, the workshop temperature is 25°C, the workshop humidity is 60% to 70%, and the vehicle speed is 30m / min; the temperature of the size tank 7 is set to 25°C.

[0072] (1) Sizing agent deployment

[0073] The deionized water, the epoxy resin slurry and the hydrophilic softener are mixed and stirred evenly in a mass ratio of 28:6:3 to obtain a sizing agent, and the solid content of the sizing agent is 8%, and is ready for use;

[0074] The epoxy resin paste is MU series paste with a solid content of 50%; the hydrophilic softener is silicone or glycerin;

[0075] (2) Pre-drying

[0076] Turn on the hot air dryer, raise the temperature to 120°C, and maintain a constant temperature;

[0077] (3) Sizing

[0078] The silicon carbide fiber 8 is wound on the bobbin 9, enters the sizing tank 7 through the sizing roller 6, and pours the sizing agent into the sizing tank 7 to perform sizing treatment on a s...

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Abstract

The invention discloses a sizing method for high-strength and high-modulus silicon carbide fibers. The sizing agent is prepared as follows: deionized water, epoxy resin slurry and hydrophilic softener are mixed in a mass ratio of 26-28:4-6 : 1-3 mix and stir evenly to obtain sizing agent; pre-drying: turn on the oven, and raise the temperature to 100 ℃ ~ 130 ℃; sizing: wind the silicon carbide fiber on the yarn bobbin, enter the sizing agent through the sizing roller, and remove the sizing agent The silicon carbide fiber is poured into the sizing tank for sizing treatment to obtain the sizing fiber; after drying the sizing fiber in the oven, the sizing fiber is wound on the yarn winding drum through the tension controller and the guide roller. It solves the problems existing in the prior art that the silicon carbide fibers are prone to hairiness and breakage during the sizing process, and the sizing agent is not suitable.

Description

technical field [0001] The invention belongs to the technical field of fiber-reinforced composite material preform preparation, in particular to a sizing method for high-strength and high-modulus silicon carbide fibers. Background technique [0002] Silicon carbide fiber is an inorganic fiber made of organosilicon compounds through spinning, carbonization or vapor deposition, and is also a ceramic fiber with excellent performance. At present, the silicon carbide fiber has been sizing once when the monofilament is prepared into a bundle, but only the smooth winding of the fiber can be achieved to form a package of a certain specification. Due to the high modulus, thick monofilament diameter, and poor bundling of silicon carbide fibers, especially the extremely low collusion strength of the fibers and easy to break, the fiber bundles fluff and break due to friction during the preparation of the preform, which cannot meet the requirements of subsequent fiber prefabrication. bo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55C04B41/84C04B41/83
CPCC04B41/84C04B41/83C04B41/009C04B41/4853C04B41/4905C04B35/62281C04B41/4584C04B41/4539
Inventor 张新元杨明杰张元尉寄望王海涛
Owner SHAANXI YUANFENG TEXTILE TECH RES
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