Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1994-02-07
1997-03-11
Czaja, Donald E.
Paper making and fiber liberation
Processes and products
Non-fiber additive
162158, 162185, 604367, 604378, 428147, 428394, D21H 2502
Patent
active
056097271
ABSTRACT:
Binder is applied to fibers during the production of a web on a wet laid sheet manufacturing line. Particles are bound to fibrous material by a binder that has a volatility less than water, wherein the binder has a functional group capable of forming a hydrogen bond with the fibers, and a functional group that is capable of forming a hydrogen bond or a coordinate covalent bond with the particles. The binder may be activated or reactivated by addition of heat, liquid, or mechanical energy such that fibers treated with binder may be shipped to a distribution point before particles are bound to the fibers. The binder may be a polymeric binder selected from the group consisting of polyethylene glycol, polypropylene glycol, polyacrylic acid, polyamides and polyamines, and in which the polymeric binder has a hydrogen bonding functionality or coordinate covalent bond forming functionality on each repeating unit of the polymeric binder. Alternatively, the binder may be a non-polymeric organic binder that includes a functionality such as a carboxylic acid, an alcohol, an amino acid, an amide, and an amine, wherein there are at least two such functionalities on the molecule, which may be the same or different functionality. Particles attached to the fibers in this manner are firmly adhered and are not easily dislodged. Fibrous products produced by this method include fibers to which particles are bound and may also include other fibers.
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Hansen Michael R.
Young, Sr. Richard H.
Czaja Donald E.
Nguyen Dean T.
Weyerhaeuser Company
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