Conjugate fiber for air-laid nonwoven fabric manufacture and method for manufacturing a high-density air-laid nonwoven fabric
US10533271B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 24, 2015 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Nov 20, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2924
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Provided is a conjugate fiber for air-laid nonwoven fabric manufacture having a planar zig-zag crimp shape before a thermal treatment, such that a uniform web is obtained by air laying with high processability and productivity, and the conjugate fiber develops a spiral crimp when the web is subjected to a thermal treatment to thereby enable the web to shrink significantly, as a result of which a nonwoven fabric can be obtained in which fibers are amassed to a high density.The conjugate fiber for air-laid nonwoven fabric manufacture is a heat-fusible conjugate fiber in which a first component comprising an olefinic thermoplastic resin is conjugated with a second component comprising an olefinic thermoplastic resin having a melting point higher than that of the first component. The conjugate form is such that the centers of gravity of the conjugate components are mutually different in the fiber cross section, the fiber has a single-yarn fineness of 1 to 10 dtex, a fiber length of 3 to 20 mm, and a planar zig-zag crimp whose crimp shape index (actual length of short fiber/distance between both ends of short fiber) ranges from 1.05 to 1.60, and the web shrinkage upon thermal treatment …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.