Method of making a bonded corrugated nonwoven fabric and product made thereby
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United States of America Patent
Stats
-
Dec 27, 1983
Grant Date -
N/A
app pub date -
May 4, 1981
filing date -
May 4, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Cited Art Landscape
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