Process for spinning multifilament yarn
US10889917B2 · kind B2 · utility
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5References
20Claims
0Family size
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Key dates
| Filing date | Oct 2, 2012 |
| Grant date | Jan 12, 2021 |
| Priority date | — |
| Expiry date | Sep 13, 2033 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/605
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A spinneret is used to reduce filament breakage during spinning of multifilament yarn being stretched at a high stretch ratio. The spinneret has a first group of spinning holes with capillaries and a second group of spinning holes with capillaries. The capillaries of the second group of spinning holes have a lower length to diameter (L/D) ratio than the capillaries of the first group of spinning holes. All of the capillaries have the same diameter, which is 100 μm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.