Composition of matter in stock preparation zone of wet laid process
US11519132B2 · kind B2 · utility
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130References
18Claims
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Key dates
| Filing date | Jul 26, 2019 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Jul 26, 2039 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H27/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A composition obtained by combining virgin cellulose fibers, cellulose ester (CE) staple fibers having a denier per filament (DPF) of less than 3, and water, and water. The CE staple fibers can also have a short cut length of less than 6 mm and can be crimped. The compositions, when co-refined, are useful to make wet laid products such as paper, cardboard, and filters that have improved water drainage, air permeability, tensile strength, bulk, burst strength, or stiffness, or a combination of these properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.