Manufacturing process for leather-like sheet
US6322851A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1999 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Jun 11, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06N3/14
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In a process for making a leather-like sheet by impregnating a fibrous substrate with a polyurethane emulsion, heat gellable polyurethane emulsion having a specific modulus of elasticity is employed as the polyurethane emulsion, and either of following methods (1) and (2) is also employed: PA1 (1) before impregnation of the polyurethane emulsion, the fibrous substrates are pretreated with a surfactant having a function of inhibiting adhesion between fibers and polyurethane PA1 (2) in addition to the above modulus of elasticity, the polyurethane emulsion has a specific .alpha. dispersion temperature, the fibrous substrates are composed of microfine fiber-forming fibers, and after coagulation of polyurethane emulsion, the fibers are converted to microfine fibers. The leather-like sheets obtained according to this invention exhibits natural leather-like softness and hand touchness as well as excellent physical properties such as bending fatigue resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.