Method of manufacture of curly fibers
US12006593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2019 |
| Grant date | Jun 11, 2024 |
| Priority date | — |
| Expiry date | Aug 8, 2041 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2401/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process comprising forming fibers having at least a first region and a second region wherein the first region comprises an ethylene/alpha olefin interpolymer composition characterized by: density in the range of 0.930 to 0.965 g/cm3; melt index (I2) in the range of from 10 to 60 g/10 minutes; molecular weight distribution in the range of from 1.5 to 2.6; tan delta at 1 radian/second of at least 45; a low temperature peak and a high temperature peak on an elution profile via improved comonomer composition distribution (ICCD) procedure; and full width at half maximum of the high temperature peak is less than 6.0° C. and stretching the fibers to an elongation of at least 20% thereby increasing curl of the fiber. The process may further include forming a non-woven from the fibers and the stretching of the fibers may occur before or after forming of the non-woven.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.