Method for manufacturing alveolate cellulosed products
US6129867A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1998 |
| Grant date | Oct 10, 2000 |
| Priority date | — |
| Expiry date | Nov 4, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2301/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a process for producing alveolar cellulosic products (sponges, sponge-cloths, etc.) from a cellulosic raw material, the process comprising: PA0 at least partially dissolving a cellulosic raw material in an intrinsic solvent for cellulose; PA0 incorporating an effective quantity of at least one pore-forming agent into the resulting mixture, with mixing; said pore-forming agent(s), being compatible with the cellulosic mixture, being capable of generating macro- and micro-pores when it/they is/are actuated; PA0 gelling the homogeneous dough thus obtained; PA0 treating said gelled dough under conditions in which the cellulose precipitates out and the pore-forming agent(s) present are actuated. The process is an advantageous alternative to the viscose process which is a polluting process. The properties of the products obtained are completely similar to those of products obtained using the viscose process. The (novel) products form part of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.