Nonwoven web material including fibers formed of recycled polyester, and methods for producing
US9539357B2 · kind B2 · utility
9Cited by
17References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2013 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Nov 1, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/681
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A nonwoven web material including fibers formed of a polyolefin and a polyester is disclosed. The fibers may include fine fibers produced by, for example, a meltblowing process. The polyolefin may be polypropylene and the polyester may be polylactic acid. The polylactic acid may be obtained and included by recycling scrap nonwoven material containing a polylactic acid component, hydrolyzing the polylactic acid component to reduce its viscosity, blending the hydrolyzed polylactic acid with a polyolefin resin, and melt-spinning the blended material to form fibers. A related process is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.