Cellulose-based fibrous materials
AssigneeNippon Paper Industries Co., Ltd.
InventorsShisei Goto, Takaharu Noda, Chie Yuzawa, Takeshi Iimori
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Abstract
The present invention aims to provide cellulose-based fibrous materials for obtaining papers and sheets having low density, high surface quality, good size stability despite of high strength, and high opacity. Cellulose-based fibrous materials having external fibrils consisting of an assembly of scale-like microfibrils exhibit a higher fiber stiffness, a lower water retention value and a higher specific surface area as compared with fibrous materials having filamentous external fibrils at the same freeness. Papers and sheets having low density, high surface quality, good size stability and high opacity can be obtained by using such fibrous materials.
Claims11
A cellulose-based fibrous material having an assembly of microfibrils having a width of 3 μm or more and a thickness of 9 nm to 2 μm as external fibrils.
The cellulose-based fibrous material having an assembly of microfibrils having a width of 3 μm or more and a thickness of 9 nm to 2 μm as external fibrils which assembly is obtained by treating a suspension of a fibrous material by contacting bubbles generated by cavitation in the suspension with the fibrous material.
A paper containing the cellulose-based fibrous material having an assembly of microfibrils having a width of 3 μm or more and a thickness of 9 nm to 2 μm as external fibrils.
Dependencies are inferred from the claim text.