METHOD AND APPARATUS FOR FIBRILLATION OF CELLULOSE CONTAINING MATERIALS
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United States of America Patent
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Issued Date -
Feb 26, 2015
app pub date -
Jun 20, 2012
filing date -
Jun 23, 2011
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Abstract
In a method for manufacturing fibril cellulose, cellulose based fibre raw material is processed mechanically in a refining gap for separating fibrils. The fibres to be refined are subjected to the action of a surface roughness Ra provided by grits elevated from a refining surface delimiting the refining gap, said surface roughness being lower than 3 μm, advantageously lower than 2 μm. The refining surface is formed by spraying grits and binder onto a substrate.
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