MANUFACTURE OF POLYESTER MATERIAL FOR FORMING AND COOLINGLY SOLIDIFYING DEVICE OF MOLTEN POLYESTER

Japanese Patent JP2993369

B2

PURPOSE: To prevent pellets from fusing to each other at the drying process before forming by a method wherein rod-like melt polymer, which is discharged from a mouthpiece and mainly made of polyester, is cooled in open air for the specified period of time and then brought into contact with cooling water so as to be solidified.
CONSTITUTION: Rod-like melt polyester polymer 6 discharged from a mouthpiece 8 is held for 0.10-0.5sec at a cooling water contacting part 2 until being immersed in cooling water 9 as air cooling time. If the air cooling time is shorter than 0.10sec, fusion may be promoted in drying process before forming. Or, if the air cooling time is longer than 0.5sec, due to the relative shaking between the rod-like polymers discharged from small holes or the like, fusion may occur during air cooling or water cooling, resulting in realizing fused pellets after being out. The reason why the above- mentioned air cooling time is selected is the development to the order of the crystallization, under which fusion can be prevented, of the surface layer, the temperature of which is lower than the melting point of polyester and, at the same time, which is slowly cooled down near its melting pont, of the discharged molten polymer having the temperature exceeding the melting point of the polyester.

JP3640103	IMPACT-RESISTANT POLYPHENYLENE SULFIDE COMPOSITION AND ITS PRODUCTION
JP2012081605	METHOD AND DEVICE FOR MANUFACTURING REGENERATED RESIN PELLET

NAGAKI TETSUO
MURAKAMI MASASHIGE
TERAKURA KATSUHIKO

JP12747094A

December 20, 1999

June 09, 1994

Click for automatic bibliography generation  

TORE KK

B29B9/06; B29B13/04; C08G63/68; C08G63/88; B29K67/00; (IPC1-7): B29B9/06; B29B13/04

JP5912805A
JP4503925A
JP7505101A

【文献】独国特許出願公開2140265(DE,A1)

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