Method of making nonwoven fabric and product made thereby having

Details Method of making nonwoven fabric and product made thereby having Method of making nonwoven fabric and product made thereby having

1984-01-03

1985-02-05

Cannon, James C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

156181, 156290, 1563084, 1563099, 156322, 264119, 264126, 264280, 428288, 428296, 604370, D04H 154, D04H 314

Patent

active

RE0318256

ABSTRACT:
The method of autogenously bonding a nonwoven web formed predominantly of thermoplastic fibers is characterized by the steps of directing heat into the web from only one surface thereof to preheat the web, and then directing the preheated web through a bonding nip formed between opposed rolls, one of said rolls being hotter than the other roll, being capable of heating the web surface it engages to a temperature above the melt point of the thermoplastic fibers and being positioned to engage the surface of the web opposite the one into which heat was directed during the preheating operation; said webs being preheated by means completely independent of the opposed rolls that form the bonding nip, and most preferably by infrared panels. The nonwoven product formed in accordance with this method also forms a part of the instant invention.

REFERENCES:
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patent: 3542634 (1970-11-01), Such et al.
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patent: 3772107 (1973-11-01), Gentile et al.
patent: 3855046 (1974-12-01), Hanson et al.
patent: 4005169 (1977-01-01), Cumbers
patent: 4035219 (1977-07-01), Cumbers
patent: 4128679 (1978-12-01), Pohland
patent: 4151023 (1979-04-01), Platt

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