Process for producing polymer film
US10829601B2 · kind B2 · utility
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20Claims
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Assignee
Inventors
Key dates
| Filing date | Jun 17, 2016 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | May 11, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a process for producing a polymer film at high productivity: during a process for drying gripped portions of both edges of a gel film, a first heat treatment is performed by blowing hot air in the film width direction and a second heat treatment is performed by blowing hot air at gripped portions of both edges of the gel film in a direction parallel to the film running direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.