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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)
Application Number:
PCT/US2019/047166
Publication Date:
May 14, 2020
Filing Date:
August 20, 2019
Export Citation:
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Assignee:
EASTMAN CHEM CO (US)
International Classes:
D21H13/06; D21H13/08; D21H21/16; D21H21/28; D21H21/36
Foreign References:
JP2018096010A2018-06-21
JP5712422B22015-05-07
JP2008190077A2008-08-21
JP2006111979A2006-04-27
JP2003119613A2003-04-23
Attorney, Agent or Firm:
CARMEN, Dennis V. (US)
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