Extrusion of wrinkle-free blown film from high modulus resin

Details Extrusion of wrinkle-free blown film from high modulus resin Extrusion of wrinkle-free blown film from high modulus resin

1992-02-07

1993-05-04

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264566, 264569, 4253261, B29C 4788

Patent

active

052079716

ABSTRACT:
An improved blown-film extrusion process with particular application for high modulus thermoplastic resins. A cylinder is mounted above the cooling air ring. The film bubble passes through this cylinder, which has a diameter approximating the final diameter of the bubble. The frost line remains at or slightly higher than the top of the cylinder, leaving a small gap between the top of the cylinder bubble. The improvement enhances bubble cooling and stability and results in wrinkle-free film.

REFERENCES:
patent: 3167814 (1965-02-01), Corbett
patent: 3548042 (1970-12-01), Hinrichs
patent: 4000234 (1976-12-01), Pilgrim et al.
patent: 4330501 (1982-05-01), Jones et al.
patent: 4399094 (1983-08-01), Fujitani et al.
patent: 4447387 (1984-05-01), Blakeslee, III et al.
patent: 4624823 (1986-11-01), Audureau et al.
patent: 4750874 (1988-06-01), Keim
patent: 4818467 (1989-04-01), Audureau et al.
patent: 4834924 (1989-05-01), D'Annunzio et al.
patent: 4842803 (1989-06-01), Bose et al.
"Modern Plastics" Nov. 1991, Alpine ad.

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