Method of pattern bonding a nonwoven web

Details Method of pattern bonding a nonwoven web Method of pattern bonding a nonwoven web

1976-04-15

1978-02-21

White, Robert F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428219, 264 83, 264119, B32B 714

Patent

active

040753832

ABSTRACT:
The method of pattern bonding nonwoven webs made from polyamide filaments wherein the web is exposed in a first treatment zone to a gaseous mixture of an activating agent and water and is then exposed in a second treatment zone to a wet atmosphere to allow the web to absorb enough additional moisture so that the web becomes essentially unbondable when pressed at room temperature. The web is then passed between a pair of rolls, at least one of which is embossed or engraved and heated to a sufficient temperature to autogenously bond discrete portions of the web while leaving the remainder of the web essentially unbonded. The high molar ratio of water to activating agent in the outer portions of the filaments in the web will prevent bonding of the web in those areas not contacted by the embossed roll, so that the web will have a high tenacity plus good drape and hand characteristics.

REFERENCES:
patent: 3150416 (1964-09-01), Such
patent: 3676244 (1972-07-01), Kim
patent: 3853659 (1974-12-01), Rhodes

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