Process for producing a nanofibrillar cellulose hydrogel
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United States of America Patent
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Nov 3, 2020
Grant Date -
Jun 28, 2018
app pub date -
Jun 2, 2016
filing date -
Jun 4, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A process for producing a nanofibrillar cellulose hydrogel comprises obtaining bleached cellulose pulp fibers and providing an aqueous suspension thereof; and subjecting the cellulose pulp fibers in the aqueous suspension to at least 2 cycles of high pressure mechanical disintegration to obtain a nanofibrillar cellulose hydrogel and thereby reducing the number of viable microorganisms present in the suspension by a factor of at least 102; wherein all steps of the process after obtaining the bleached cellulose pulp fibers are performed under conditions of ISO 8 of ISO 14644-1 cleanroom standards or stricter. A nanofibrillar cellulose hydrogel, a system for producing the same and the use of a disintegrating apparatus are also disclosed.
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International Classification(s)
- D21B:FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMEN....
- A61K:PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOS....
- C12N:MICRO-ORGANISMS OR ENZYMES; COMPOSITIONS THEREOF
- C08B:POLYSACCHARIDES; DERIVATIVES THEREOF
- A61Q:USE OF COSMETICS OR SIMILAR TOILET PREPARATIONS
- D21C:PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE ....
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