Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1977-04-28
1978-07-11
Bell, James J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
156290, 156306, 428195, 428288, 428296, D04H 158
Patent
active
041003195
ABSTRACT:
A process is described for the intermittent autogenous bonding of a continuous filament web wherein the filaments have a low degree of crystallinity. In one embodiment, the process involves passing the web directly through a nip formed by a smooth hard surfaced roll and a roll containing raised points on its surface with both rolls being maintained at a temperature near the softening point of the filaments. The speed of the web through the nip, the roll size and the configuration of the raised points are coordinated such that the surface temperature of the web is not substantially increased before maximum pressure has been developed in the nip, but then is rapidly raised to a point where surface fusion is effected before a significant increase in filament crystallinity occurs. Webs prepared as illustrated possess a desirable combination of surface abrasion resistance and strength.
REFERENCES:
patent: 3542634 (1970-11-01), Such et al.
patent: 3748216 (1973-07-01), Brock
Bell James J.
Kimberly-Clark Corporation
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