Surface treatment with texturized microcrystalline cellulose microfibrils for improved paper and paper board
AssigneeInternational Paper Company
InventorsXuan Truong Nguyen, Zheng Tan
Life of this patent
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Abstract
The present invention relates to the production of texturized microcrystalline cellulose from raw pulp material. This texturized microcrystalline cellulose can then be used for surface treatment of paper or paper board. Additionally, the texturized microcrystalline cellulose may be used as a starting material for production of paper or paper board.
Claims23
A process for producing a texturized microcrystalline cellulose for use in a paper or paper board coating composition, said process comprising the steps of:
- (a) hydrolyzing a cellulosic material with a mineral acid to provide a crystalline intermediate having an intrinsic viscosity ranging from about 1.2 to about 1.8 dL/g and a degree of polymerization ranging from about 150 to about 200, said intermediate also comprising a significant amount of hemicelluloses;
- and
- (b) mechanically defibrillating said intermediate to produce texturized microcrystalline cellulose particles of micron and sub-micron size.
A process for producing a paper or paper board having a texturized microcrystalline cellulose coating composition, said process comprising the steps of:
- (a) hydrolyzing a cellulosic material with a mineral acid to provide a crystalline intermediate having an intrinsic viscosity ranging from about 1.2 to about 1.8 dL/g and a degree of polymerization ranging from about 150 to about 200, said intermediate also comprising a significant amount of hemicelluloses;
- (b) mechanically defibrillating said intermediate to produce texturized microcrystalline cellulose particles of micron and sub-micron size.
- (c) coating of the paper or paper board product with said texturized microcrystalline cellulose particles.
The paper or paper board product produced by the process comprising:
- (a) hydrolyzing a cellulosic material with a mineral acid to provide a crystalline intermediate having an intrinsic viscosity ranging from about 1.2 to about 1.8 dL/g and a degree of polymerization ranging from about 150 to about 200, said intermediate also comprising a significant amount of hemicelluloses;
- and
- (b) mechanically defibrillating said intermediate to produce texturized microcrystalline cellulose particles of micron and sub-micron size.
- (c) coating of the paper or paper board product with said texturized microcrystalline cellulose particles.
Dependencies are inferred from the claim text.