Core-sheath type conjugated yarn, knitted fabric, clothing product, and method of producing core-sheath type conjugated yarn
US8596032B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2010 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Sep 28, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L75/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In an embodiment, a core-sheath type conjugated yarn includes a core portion containing a double-prepolymer type polyurethane and a sheath portion containing an elastomer. The double-prepolymer comprises a prepolymer having terminal isocyanate groups obtained from reacting a polyol and a diisocyanate, and a prepolymer having terminal hydroxyl groups obtained from reacting a polyol, a diisocyanate, and a low-molecular weight diol. In other embodiments, a method of producing the core-sheath type conjugated yarn using conjugate spinning conditions provides a conjugated yarn with a fineness of 18 to 110 dtex, a weight ratio of the core portion to the sheath portion of 95/5 to 60/40, and a drawing ratio of 1.5 to 4.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.