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US 12,291,800 B2Granted
Method of producing melt-anisotropic aromatic polyester multifilament
AssigneeKuraray Co., Ltd.
InventorsYuji Ogino, Takuji Nakamura, Kota Togii
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Abstract
Provided is a melt-anisotropic aromatic polyester multifilament having excellent abrasion resistance. The melt-anisotropic aromatic polyester multifilament has a single fiber fineness from 10 to 80 dtex and comprises 3 to 10 wt % of a dimethylsilicone-series finishing agent applied on a fiber surface of the multifilament, based on the multifilament, the finishing agent containing a dimethylsilicone-series compound having a weight average molecular weight from 15000 to 40000.
Claims20
A method of producing a melt-anisotropic aromatic polyester multifilament, the method comprising:
- heat-treating as-spun filaments of a melt-anisotropic aromatic polyester to give a heat-treated multifilament;
- and
- applying a dimethylsilicone-series finishing agent to the heat-treated multifilament to produce a melt-anisotropic aromatic polyester multifilament, the melt-anisotropic aromatic polyester multifilament having a single fiber fineness from 10 to 80 dtex, the finishing agent being applied in a proportion of 3 to 10 wt % based on the heat-treated multifilament, the finishing agent containing a dimethylsilicone-series compound having a weight average molecular weight from 15000 to 40000.
Dependencies are inferred from the claim text.