Static-dissipative foam extrusion calibration with minimized expansion loss
US9511523B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2012 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Apr 18, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/055
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The disclosure relates to a calibrator including a first plate opposing a second plate, the first plate having a first foam-expansion surface adjacent to a first anti-static surface, the second plate having a second foam-expansion surface adjacent to a second anti-static surface, wherein the first foam-expansion surface and the second foam-expansion surface are aligned to form a foam-expansion region, and wherein the first anti-static surface and the second anti-static surface are aligned to form an anti-static region. The disclosure also relates to a method of producing a polyetherimide foam, the method including passing a liquid polymer mixture comprising a polyetherimide through the calibrator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.