Patent · US Active

Process for producing foam panels for the production of foam films

US11833703B2 · kind B2 · utility

0Cited by

9References

9Claims

0Family size

Assignee

Evonik Operations GmbH · DE

Inventors

Felix Goldmann · Griesheim, DE
Thomas Richter · Wauseon, US
Matthias Roth · Lambach, DE
Florian Becker · Clamart, FR
Jorge PINTO · Darmstadt, DE

Key dates

Filing date	Oct 12, 2021
Grant date	Dec 5, 2023
Priority date	—
Expiry date	Oct 12, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2379/08
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A process can be used for producing foam panels, for the production of foam films, composed of a polymer having a glass transition temperature Tg of at least 100° C. An average cell diameter of the foam panels measured according to the standard ASTM D 3576 is between 20 μm and 250 μm, and less than 20 cells having a diameter >260 μm are present per m2. The elongation at break of the foam is 4%-13% measured according to ASTM D 638.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.