Method of ultrasonically bonding nonwoven webs

Details Method of ultrasonically bonding nonwoven webs Method of ultrasonically bonding nonwoven webs

1985-01-18

1986-08-12

Gallagher, John J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 732, 1563088, 156324, 264 23, 428286, B32B 3116

Patent

active

046054545

ABSTRACT:
Improved method of forming bonded web laminates by application of a liquid spray between the component layers prior to application of high frequency vibrational energy commonly referred to as "ultrasonic energy". The liquid is preferably water and added in a minor amount, preferably less than about 25% by weight of the combined webs. The water may be added by spraying or misting and, after bonding and drying, provides improved uniformity and web bonding while allowing increased bonding rates. The method of the invention is particularly useful with heavier basis weight thermoplastic polymeric nonwoven fiber webs to be combined for durable applications such as recreational fabrics for tents and the like.

REFERENCES:
patent: 3236587 (1966-02-01), Genereux
patent: 3660186 (1972-05-01), Sager et al.
patent: 3901755 (1975-08-01), Martin et al.
patent: 4109353 (1978-08-01), Mitchell et al.

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