Composition of matter effluent from refiner of a wet laid process
AssigneeEastman Chemical Company
InventorsCharles Stuart Everett, Melvin Glenn Mitchell, Kenny Randolph Parker, Koushik Ghosh, Mounir Izallalen
Life of this patent
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Abstract
A composition and process for making the composition by co-refining: fibrillated virgin cellulose fibers, waste/recycle cellulose fibers, or both; co-refined cellulose ester (CE) staple fibers having a denier per filament (DPF) of less than 3 and the weight percent of CE staple fibers is less than 30 wt. %, based on the weight of CE staple fibers and said cellulose fibers; and water. The composition can be co-refined to obtain lower Canadian standard freeness yet improved drainage and wet laid products having good tensile strength, air permeability, stiffness, burst strength, and bulk.
Claims14
A process comprising refining a feed composition fed to a refiner, said feed composition comprising:
- a. virgin cellulose fibers, waste/recycle cellulose fibers, or both, and
- b. cellulose ester (CE) staple fibers at a weight ratio of cellulose fibers to CE staple fibers of more than 3:1, said CE staple fibers having:
- i. a denier per filament (DPF) of less than 3,
- ii. a cut length of less than 6 mm,
- iii. crimping, and
- iv. a non-round cross-sectional shape, and
- c. water.
Dependencies are inferred from the claim text.