Title:
COMPOSITION OF MATTER IN STOCK PREPARATION ZONE OF WET-LAID PROCESS
Document Type and Number:
WIPO Patent Application WO/2020/046628
Kind Code:
A3
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, and optional additives prepared or added to a hydropulper, first blend tank, processed through a refiner, in a second blend tank, or in a machine chest. The CE staple fibers can also have a short cut length of less than 6 mm and can be crimped. The compositions are useful to recycle broke to the stock preparation zone and can be processed back through a refiner. The compositions allow for high drainage rates through the wire, allowing flexibility in the refining to adjust refining energy and intensity. 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.
Inventors:
EVERETT CHARLES STUART (US)
MITCHELL MELVIN GLENN (US)
PARKER KENNY RANDOLPH (US)
IZALLALEN MOUNIR (US)
GHOST KOUSHIK (US)
MITCHELL MELVIN GLENN (US)
PARKER KENNY RANDOLPH (US)
IZALLALEN MOUNIR (US)
GHOST KOUSHIK (US)
Application Number:
PCT/US2019/047166
Publication Date:
May 14, 2020
Filing Date:
August 20, 2019
Export Citation:
Assignee:
EASTMAN CHEM CO (US)
International Classes:
D21H13/06; D21H13/08; D21H21/16; D21H21/28; D21H21/36
Foreign References:
JP2018096010A | 2018-06-21 | |||
JP5712422B2 | 2015-05-07 | |||
JP2008190077A | 2008-08-21 | |||
JP2006111979A | 2006-04-27 | |||
JP2003119613A | 2003-04-23 |
Attorney, Agent or Firm:
CARMEN, Dennis V. (US)
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