Process for making tissue-absorbent particle laminates

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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156 64, 156 83, 156276, 156283, 1563088, 156324, 1563244, 428326, 428327, 604364, 604375, B32B 3100

Patent

active

048510696

ABSTRACT:
A process of making a liquid absorbing laminated structure comprising long lengths of absorptive tissues and an intermediate layer of absorptive particles is performed while the tissues are traveling in the direction of their lengths. A film of moistening liquid is transferred to a surface of a first tissue which is then supported in substantially horizontal position and showered with dry absorbent particles, which are rendered adhesive by absorption of the moistening liquid. A second tissue is superposed and the assembly is bonded together by passing it through the nip between a heated roller having a surface temperature of at least 110.degree. C. and a pressure roller. These rollers are pressed together at the nip by a pressure of at least 350 pounds per square inch and each has a surface hardness in excess of 90 Shore A Durometer.

REFERENCES:
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patent: 3070095 (1962-12-01), Torr
patent: 3073736 (1963-01-01), Lange
patent: 3098780 (1963-07-01), Krause
patent: 3256138 (1966-06-01), Welch et al.
patent: 4055180 (1977-10-01), Karami
patent: 4260443 (1981-04-01), Lindsay et al.
patent: 4296234 (1981-10-01), Mindt et al.
Reprint of article from "Index 78 Programme, Session 3: Hygiene Absorbent Products" of Paper 4 -Super-Absorbent Polymers for use with Body Exudates, by Schlauch et al., published prior to Jun. 20, 1984.
Process of making Absorbent Laminates Practiced Commercially by (Assignee, Bird Machine Company, Inc.) of South Walpole, Mass., prior to Jun. 20, 1983.

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