Process for fiber recovery from bonded fiber webs

Details Process for fiber recovery from bonded fiber webs Process for fiber recovery from bonded fiber webs

1997-05-06

1999-12-21

Silbaugh, Jan H.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Mineral fibers

162 5, 162 8, 162 70, 260DIG31, 260DIG43, B03B 104

Patent

active

060044284

ABSTRACT:
A process for dissolving a binder off a fiber web bonded therewith includes treating the fiber web, which is bonded with a polymeric binder having carboxylate groups crosslinked via alkaline earth metal cations, with an aqueous solution of an alkali metal salt to form a sparingly soluble salt or complex between the anion of the alkali metal salt and the alkaline earth metal cations, and then removing the fiber freed of the binder.

REFERENCES:
patent: 4009313 (1977-02-01), Crawford et al.
patent: 5082697 (1992-01-01), Patton et al.
patent: 5300359 (1994-04-01), Matejcek et al.
patent: 5308701 (1994-05-01), Cohen et al.

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