Isotropic pitch-based carbon fiber spun yarn, composite yarn and fabric using the same, and manufacturing methods thereof
AssigneeKureha Corporation
InventorsAkira Takeuchi, Tatsuo Kobayashi
Life of this patent
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Abstract
A method of manufacturing an isotropic pitch-based carbon fiber spun yarn fabric includes the following steps of: obtaining composite yarn by winding a water-soluble polymer fiber around a surface of isotropic pitch-based carbon fiber spun yarn; obtaining a composite yarn fabric by weaving the composite yarn; and obtaining the isotropic pitch-based carbon fiber spun yarn fabric by dissolving and removing the water-soluble polymer fiber from the composite yarn fabric.
Claims23
An isotropic pitch-based carbon fiber spun yarn fabric produced by a process comprising:
- winding a water-soluble polymer fiber around a surface of an isotropic pitch-based carbon fiber spun yarn to form a composite yarn;
- weaving the composite yarn to form a composite yarn fabric;
- and
- dissolving and removing the water-soluble polymer fiber from the composite yarn fabric.
A method of manufacturing an isotropic pitch-based carbon fiber spun yarn fabric, comprising the steps of:
- obtaining composite yarn by winding a water-soluble polymer fiber around a surface of isotropic pitch-based carbon fiber spun yarn;
- obtaining a composite yarn fabric by weaving the composite yarn;
- and
- obtaining the isotropic pitch-based carbon fiber spun yarn fabric by dissolving and removing the water-soluble polymer fiber from the composite yarn fabric.
A composite yarn comprising:
- isotropic pitch-based carbon fiber spun yarn;
- and
- a water-soluble polymer fiber wound around a surface of the spun yarn.
Isotropic pitch-based carbon fiber spun yarn, wherein fine carbon fiber aggregates, which are contained in the isotropic pitch-based carbon fiber spun yarn, have a maximum diameter equal to or below 3.0 times of an average diameter of foundation yarn of the spun yarn and a maximum length equal to or below 10 mm.
A method of manufacturing isotropic pitch-based carbon fiber spun yarn comprising the steps of:
- removing fine carbon fibers and aggregates thereof by at least one process selected from the group consisting of the following (a) to (d):
- (a) a process of allowing the spun yarn to contact a roller rotating in the same direction as a traveling direction of the spun yarn at a circumferential velocity equal to or greater than a feeding velocity of the spun yarn;
- (b) a process of blowing an air flow over the spun yarn;
- (c) a process of washing the spun yarn with water;
- and
- (d) a process of washing the spun yarn with water while applying an ultrasonic wave, and
- obtaining the spun yarn containing the fine carbon fiber aggregates having a maximum diameter equal to or below 3.0 times of an average diameter of foundation yarn of the spun yarn and a maximum length equal to or below 10 mm.
Dependencies are inferred from the claim text.