Use of surface active agents for improved cooling of thermoplast

Details Use of surface active agents for improved cooling of thermoplast Use of surface active agents for improved cooling of thermoplast

1990-01-08

1991-09-17

Thurlow, Jeffery

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624425, 26417719, 264178R, 264237, B29C 4788

Patent

active

050492233

ABSTRACT:
An improved cooling process for thermoplastic film webs, profiles, or shapes and interlocking closure profiles extruded onto film webs for use on reclosable bags or containers is provided. A mixture of a surfactant and water is used to cool film webs or closure profiles which have been extruded and secured onto a film web. The surfactant lowers the surface tension of the water, improving its wetting properties and providing faster cooling of the film. The resulting film structures are more stable and consistent in structure.

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patent: 4263079 (1981-04-01), Sutrina
patent: 4540537 (1985-09-01), Kamp
patent: 4555282 (1985-11-01), Yano
patent: 4676851 (1987-06-01), Scheibner et al.
patent: 4683015 (1987-07-01), Wagers

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