Paper composition
AssigneeFiberLean Technologies Limited
InventorsJohn Claude Husband, Per Svending
Life of this patent
Estimating the term…
Abstract
A paper product may include high energy thermomechanical pulp (TMP), low energy TMP, and microfibrillated cellulose. The paper product may also include inorganic particulate material. A papermaking composition suitable for making the paper product, a process for preparing the paper product, and use of microfibrillated cellulose may include high energy TMP, low energy TMP, and microfibrillated cellulose, and optionally inorganic particulate material. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50 in the paper product.
Claims7
A papermaking composition for preparing a paper product comprising high energy thermomechanical pulp (TMP), low energy TMP, and microfibrillated cellulose, and further comprising about 1% to about 50% by weight inorganic particulate material, wherein the paper product comprises at least about 30% by weight high energy TMP and low energy TMP and between 0.1% to 5% by weight of said microfibrillated cellulose, based on the total weight of the paper product;
- wherein the weight ratio of high energy TMP to low energy TMP is from about 55:45 to about 50:50;
- wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50;
- wherein the low energy TMP has a Canadian standard freeness of from about 80 to about 130 cm3, and wherein the high energy TMP has a Canadian standard freeness of from 10 to 60 cm3.
Dependencies are inferred from the claim text.