Method of making a bonded corrugated nonwoven fabric and product

Details Method of making a bonded corrugated nonwoven fabric and product Method of making a bonded corrugated nonwoven fabric and product

1981-05-04

1983-12-27

Thibodeau, Paul J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1563082, 264282, 428152, 428156, 428296, B32B 330, B32B 302

Patent

active

044228929

ABSTRACT:
A nonwoven fabric is made by first forming a web (12) consisting predominately of thermoplastic fibers, then pattern embossing the web at an elevated temperature to form autogenous thermal bonds extending through the web, then creping the bonded web by pressing the bonded web against a driven, grooved roll (30) which feeds the web against a retarding member (32). The temperature of the web during the creping step is controlled so that some of the thermoplastic fibers are softened which assists the formation and retention in the web of both the crepe and noticeable ridges 50 of predominately unbonded fibers. This heating of the web (12) also results in some bonding of fibers in the grooves (52) of the creped web (12) which gives the web (12) a striped appearance. In the creped web, when the autogenous bonds are lineal and generally extend in the cross direction of the web, the creped web can take on a seersucker or corduroy-like appearance depending upon the amount of compaction during the creping step.

REFERENCES:
patent: 3059313 (1962-10-01), Harmon
patent: 3687754 (1972-08-01), Stumpf
patent: 3949128 (1976-04-01), Ostermeier
patent: 4090385 (1978-05-01), Packard
patent: 4315965 (1982-02-01), Mason et al.

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