Foamed thermoplastic resin molding and process for producing the same
US6685875B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2001 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Jun 4, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C44/0415
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to foamed thermoplastic resin moldings which can be used, for example, as food product containers which can contain retort food products, etc., household electrical appliance parts and automotive interior parts, and to a process for producing the same, said foamed thermoplastic resin molding prepared by shaping a foamed thermoplastic resin sheet, the molding comprising a general part and a thick part wherein these parts differ from each other in thickness wherein the mean expansion ratio of the thick part is not less than 1.2 times the mean expansion ratio of the general part and wherein the maximum thickness of the thick part is not less than 1.5 times the thickness of the general part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.