Compositions
AssigneeFiberLean Technologies Limited
InventorsJohn Claude HUSBAND, Per SVENDING, David Robert SKUSE
Life of this patent
Estimating the term…
Abstract
The present invention relates to compositions and methods for coating paper products
Claims10
1-26. (canceled)
A composition for coating paper products comprising a co-processed microfibrillated cellulose and inorganic particulate material composition, wherein the microfibrillated cellulose has a fibre steepness of from 20 to 50 and a d50 of from 5 to 500 μm, and wherein when the coating composition is applied to a paper product, the coated paper product has a tensile strength greater than the tensile strength of the paper product coated with a control coating composition having the same composition except for the co-processed microfibrillated cellulose and inorganic particulate material composition.
The coating composition according to claim 1, wherein the organic particulate material is calcium carbonate.
The coating composition according to claim 1, wherein the organic particulate material is kaolin.
The coating composition according to claim 1 further comprising one or more of the following additives:
- a. one or more pigments, such as calcium sulphate, satin white, and so-called ‘plastic pigment’;
- b. one or more binding or co-binding agents;
- c. one or more cross linkers;
- d. one or more water retention aids;
- e. one or more viscosity modifiers and/or thickeners;
- f. one or more lubricity/calendering aids;
- g. one or more dispersants;
- h. one or more antifoamers and defoamers;
- i. one or more optical brightening agents and fluorescent whitening agents;
- j. one or more dyes;
- k. one or more biocides/spoilage control agents;
- l. one or more leveling and evening aids;
- and
- m. one or more grease and oil resistance additives.
A method for coating a paper product comprising:
- providing a coating composition on the paper product to form a coating, wherein the coating composition comprises a co-processed microfibrillated cellulose and inorganic particulate material composition, wherein the microfibrillated cellulose has a fibre steepness of from 20 to 50 and a d50 of from 5 to 500 μm, for the preparation of a coated paper product with a tensile strength about 5% greater, about 10% greater, or about 20% greater than the tensile strength of the coated paper product comprising a coating composition devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition
Dependencies are inferred from the claim text.