Process for the preparation of cellulose sheet
US5607639A · kind A · utility
35Cited by
12References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1994 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Mar 31, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2301/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Method for the preparation of cellulose sheet by extrusion of a heated solution of cellulose in a tertiary amine-oxide, which method includes using an extrusion die with an extrusion orifice, characterised in that, immediately below the extrusion orifice there is provided an inlet for cooling gas to cool the extruded sheet. The method according to the invention is especially suitable for the preparation of cellulose tubular films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.