Polyethylene terephthalate foams with integral crystalline skins
US5223545A · kind A · utility
38Cited by
17References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1992 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | Oct 9, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Polyethylene terephthalate composite structures having integral crystalline skins on a foam of polyethylene terephthalate are described. The structures exhibit enhanced physical properties compared to polyethylene terephthalate foams. The structures are produced by a method that crystallizes a portion of the polyethylene terephthalate before foaming the uncrystallized portions of the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.