Low density laminated foam and process and apparatus for producing same
US3930917A · kind A · utility
35Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1974 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Sep 23, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249993
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An apparatus and process for laminating a flexible sheet of covering material to a foamed thermoplastic sheet wherein the process includes the steps of expanding aged or directly extruded thermoplastic foam sheet by heat until the foam has reached its softening point; heating the covering material to above the melting point of the foam; and, applying the heated covering material to the softened foam sheet to bond the sheet to the foam thereby forming a laminated product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.