Cover pad for air bag device
US5641554A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1995 |
| Grant date | Jun 24, 1997 |
| Priority date | — |
| Expiry date | Apr 17, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24537
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A cover pad for an air bag device, a main body of which is molded into a single layer using a resin/elastomer blend. The resin/elastomer blend is made by blending PP with an elastomer in a ratio ranging from 60/40 to 40/60 by weight. The elastomer is made by blending an EPM with a styrene-containing thermoplastic elastomer in a ratio ranging from 80/20 to 20/80 by weight. In addition, copolymerization of the EPM produces a propylene content ranging from 21 to 40 mol %; 3 mol %.ltoreq.P-P.ltoreq. 12 mol %; and 35 mol %.ltoreq.E-P.ltoreq.50 mol % (where P-P is the dyad chain configuration (.sup.13 C-NMR) of the propylene-propylene bond; and E-P is the dyad chain configuration (.sup.13 C-NMR) of the ethylene-propylene bond).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.