Production of synthetic suede leather
US4174414A · kind A · utility
4Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1977 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | Jun 8, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/659
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Synthetic suede leather is produced by casting a mixture containing polyurethane elastomer and a solvent therefor between two sheets of a substrate fabric, immersing the resulting structure in a liquid which is a nonsolvent for polyurethane elastomer but miscible with said solvent, splitting said structure into two sheets at middle of the cast layer before it is fully gelled, and re-immersing the resultant sheets in said nonsolvent to allow complete gelation of said mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.