METHOD FOR PRODUCING NANOFIBRILLAR CELLULOSE AND NANOFIBRILLAR CELLULOSE PRODUCT
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United States of America Patent
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Issued Date -
Aug 27, 2020
app pub date -
May 13, 2020
filing date -
Mar 31, 2014
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Abstract
In a method for producing nanofibrillar cellulose, cellulose based fibre material, in which internal bonds in cellulose fibres have been weakened by preliminary modification of cellulose, is subjected to disintegration treatment in form of pulp comprising fibres and liquid. The fibre material is supplied at a consistency higher than 10 wt-%, preferably at least 15 wt-%, to a disintegration treatment where fibrils are detached from the fibre material by joint effect of repeated impacts to the fibre material by fast moving successive elements and the weakened internal bonds of the cellulose fibres. The nanofibrillar cellulose is withdrawn from the disintegration treatment at dry matter which is equal or higher than the consistency of the fibre material.
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