Method of making glazed nonwoven fabric
US9290877B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2013 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | May 23, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/626
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A glazing method for improving abrasion resistance using a heated smooth roll to melt the lower-melting-point portion of bicomponent fibers as the spunbond web passes over the heated smooth roll. Because there is no external pressure exerted in a nip by an opposing second roller, as in calendering, the outer surface of the web which does not contact the heated smooth roll remains essentially unchanged and the nonwoven fabric exhibits no compression as a result of the glazing process. The roll temperature and dwell time (roll diameter, wrap angle and line speed) are controlled for the purpose of surface treating only one side of the nonwoven fabric to improve abrasion resistance while allowing the air permeability and web thickness to remain essentially unchanged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.