Laminated steel with compliant viscoelastic core
US8328971B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2010 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Mar 15, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24998
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Laminated metallic sheets which comprise an interior layer of a viscoelastic polymeric compound sandwiched between outer layers of metallic sheet may exhibit enhanced properties through modification of the viscoelastic phase. In a first embodiment the elastic modulus of the viscoelastic polymeric compound may be reduced by incorporating voids, bubbles or pores within the compound. These voids which may be introduced by introduction of polymeric microspheres are effective in reducing the internal stresses induced in the laminate by temperature changes. In a second embodiment, coating the microspheres with an electrically-conductive layer may be effective in enabling resistance spot welding of such laminated materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.