Method of molding automobile outer trim part, laminated film or sheet for use therein and automobile outer trim part
US6110547A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 1, 1998 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Apr 1, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31909
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a method of molding an automobile outer trim part, including the steps of: (1) providing a film or sheet comprising a colored layer composed of a propylene polymer composition and, laminated thereto, a clear layer composed of a propylene homopolymer, (a) heating the laminated film or sheet, (3) feeding the heated laminated film or sheet into a metal mold including a pair of dies, (4) closing the metal mold so that the laminated film or sheet is shaped into desired configuration, (5) loosing the closed metal mold, and (6) injecting a thermoplastic polymer onto the side of the colored layer of the metal mold so that the shaped laminated film or sheet is united with a substrate layer of the thermoplastic polymer. The above propylene polymer composition comprises in a specified proportion a polypropylene block copolymer and/or polypropylene random copolymer exhibiting a specified intrinsic viscosity, a polyethylene exhibiting a specified intrinsic viscosity, an elastomer composed of a copolymer of ethylene and an .alpha.-olefin exhibiting a specified intrinsic viscosity and a colorant. The above method enables providing an automobile outer trim part having the same colored…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.