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US 12,522,956 B2Granted
Bundled yarn, hydraulic composition and molded body
AssigneeKuraray Co., Ltd.
InventorsAkira Imagawa, Takafumi Horikoshi, Hisashi Suemori, Yoshihiro Iwasaki
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Abstract
The present invention relates to a bundled yarn, comprising plural fibers integrated by a sizing agent, wherein the sizing agent is a modified polyvinyl alcohol comprising a structural unit (X) derived from an unsaturated carboxylic acid or derivative thereof in an amount of 0.1 to 10% by mole, taking the amount of all monomer units as 100% by mole, which modified polyvinyl alcohol has a saponification degree of 85% by mole or higher.
Claims20
A bundled yarn, comprising:
- plural fibers integrated by a sizing agent,
- wherein the sizing agent is a modified polyvinyl alcohol comprising a plurality of a structural unit (X) comprising a carboxylate unit, derived from an unsaturated carboxylic acid or derivative thereof in polymerized form, in range of from 2 to 9 mol. %, taking an amount of all monomer units as 100 mol. %,
- wherein the structural unit (X) comprises a structural unit of formula (X1) and (X2):
- X being H or a methyl group and Y being H, an alkali metal atom, or an alkyl group having 1 to 5 carbon atoms,
- wherein an X1/(X1+X2) molar amount ratio is in a range of from 0.90 to 0.99,
- wherein the modified polyvinyl alcohol has a saponification degree of 85 mol. % or higher, and
- wherein the bundled yarn has a fiber separation degree of 90% or higher.
4 more elements
Dependencies are inferred from the claim text.