Nondistorted polyethylene foam structures and process for making
US5206082A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1992 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Jun 1, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2975
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a closed-cell, non-crosslinked foam structure of a ratio of minor dimension to major dimension of about 1/8 or less comprising a plurality of coalesced extruded strands or profiles of a foamed polyolefin composition having an average cell size of from 0.02 to 0.5 millimeters. The cross-sectional geometry of the foam structure substantially corresponds to the overall arrangement of the orifices of the die from which the foamed polyolefin composition was extruded. Further disclosed is a process for making the above foam structure comprising extruding a foamable polyolefin composition through the multiorifice die to form the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.