Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Patent
1977-12-09
1980-05-20
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
264560, 264562, 264565, 264569, 264178R, 425 71, B29D 2304
Patent
active
042039428
ABSTRACT:
Substantial and commercially important increases in polypropylene film production rates without adversely affecting film quality are obtained in a tubular water film process. The improvements comprise modifications in the die lip, in the mandrel air (fluid) slot affecting the cooling gas velocity, and in the upper bubble pressure control. The improvements are especially useful to obtain mill rolls 60 to 80 inches wide.
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Mitchell Willard N.
Sims, Jr. J. Robert
Williamson Charles W.
Exxon Research & Engineering Co.
Kurtzman Myron B.
Roth David A.
Thurlow Jeffery R.
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