Method for restoring bulkiness of nonwoven fabric
US7131171B2 · kind B2 · utility
4Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2003 |
| Grant date | Nov 7, 2006 |
| Priority date | — |
| Expiry date | Aug 4, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F13/15707
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for restoring bulkiness of nonwoven fabric which contains crimped thermoplastic fiber and is in a roll form is disclosed. The method comprises unwinding the nonwoven fabric from the stock roll, and blowing hot air to the unwound nonwoven fabric by a through-air technique to make the nonwoven fabric increase in bulkiness. The hot air is heated at a temperature lower than the melting point of the thermoplastic fiber and not lower than a temperature lower than that melting point by about 50° C., and is blown for about 0.05 to 3 seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.