Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Patent
1993-07-14
1995-04-04
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
264566, 264569, 425 721, 4253261, B29C 5528
Patent
active
054035392
ABSTRACT:
A method and apparatus for molding an inflation film even from a thermoplastic resin having a small melt tension, in which a melt resin bubble extruded from an extruder is molded, while controlling a resin temperature of the bubble to a certain temperature range by an air ring provided with a plurality of annular slits for blowing cooling air in a take-up direction of the melt resin bubble and provided at a position at which the melt resin bubble is remarkably expanded, after (a) cooling air is blown to a melt resin bubble from a first air ring provided at the proximity of a die outlet to cool said melt resin bubble; and, then, the bubble is either (i) brought into contact, on the inner surface thereof, with the surface of a stabilizer provided on a die surface, or (ii) is supported in a non-contact state through an air layer, while being taken up.
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Patent Abstracts of Japan, vol. 7, No. 71 (M202) (1216) 24 Mar. 1983.
Hatano Hisashi
Kobayashi Tomoaki
Kotani Terumitu
Onoda Takeshi
Taka Toshio
Showa Denko K.K.
Thurlow Jeffery R.
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