Method of producing a soft, nonwoven web

Details Method of producing a soft, nonwoven web Method of producing a soft, nonwoven web

1976-04-19

1978-01-24

Van Horn, Charles E.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156181, 156289, 156290, 156306, 156344, 264211, 264300, D04H 316

Patent

active

040702189

ABSTRACT:
A soft, nonwoven web is produced by adding directly to a thermoplastic polymer at the time of extrusion a lubricating agent having an HLB number in the range of 8 to 20 and a molecular weight in the range of from 200 to 4000. The lubricating agent is uniformly distributed into the polymer as extruded into filaments. The filaments are collected to form a web and then subjected to heat treatment in the range of from 180-260.degree. F. for at least about 1-7 seconds. The lubricating agent migrates to the surface of the fibers producing a release effect and preventing secondary bonding from occurring. After pattern bonding to provide spaced areas of high intensity bonds, the result is a soft, strong nonwoven web having particular utility as a liner for disposable diapers and catamenial devices.

REFERENCES:
patent: 3575856 (1971-04-01), Anton
patent: 3855045 (1974-12-01), Brock
patent: 3870567 (1975-03-01), Palmer et al.
patent: 3959560 (1976-05-01), Sturwold et al.
patent: 3988410 (1976-10-01), Larson et al.

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