Foam laminate product and process for production thereof
US7901765B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2004 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Jul 22, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249992
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A laminate product comprising a foam core having a pair of opposed major surfaces and a cover layer secured with respect to each major surface is described. The cover layer is essentially free of fibreglass and comprises a polymeric substrate having disposed therein a plurality of porous material layers. It has been found that the use of fibreglass as a reinforcing material (and other sheet materials having a tensile modulus of greater than or equal to about 0.5 GPa when measured pursuant to ASTM D 5034) in a foam laminate product can be avoided by using a porous material layer in place of the fibreglass. In a preferred embodiment of the invention, the porous material layer has a tensile modulus less than that of fibreglass mat yet can be used to produce a foam laminate product having significantly higher strength properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.