Process for producing motor vehicle seat cushioning
US11752671B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 2019 |
| Grant date | Sep 12, 2023 |
| Priority date | — |
| Expiry date | May 14, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/58
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for creating a motor vehicle seat cushion. The inventive method provides for a cover having a format of a complex comprising a layer of covering material and a sublayer of elastically compressible foam, and for arranging on the sublayer a film based on thermoplastic polyurethane. The film has a melting point and a melt mass-flow index that breaks down under the action of the heat released during the formation of the foam. The film is provided with a reinforcing thin-film to form a two-layer barrier against the penetration of foam. The reinforcing thin-film is based on a thermoplastic polyurethane with a melting point higher than that of the film and has a melt mass-flow index lower than that of the film, to have greater strength than the film so that the reinforcing thin-film breakdown under the action of heat is delayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.