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co extrusion

Author	Topic: co extrusion
mittul143 Senior Member Posts: 11 From:ahmedabad, gujarat, INDIA Registered: May 2005	posted March 12, 2007 05:02 AM Dear sir, Please let me know that weather it is possible to run 3-layer blown film plant without any chiller system for air ring. Can i run machine without chilling the air, what maximum temperature on Air ring must be to run LDPE to produce shrink film. if i am getting +25 degree on Air ring, it will be any problme or not? Die dia is 350mm, maximum processable width of film is 1500mm. also, what shoud be maximum water temperature for circulation of water in feed throat of extruders? Thanking you in advance Mitul R. Chavda IP: Logged
Bob Cunningham Senior Member Posts: 124 From:Amesbury, Mass Registered: Nov 2002	posted March 12, 2007 11:53 AM It is definately possible to run without chilled air. The consequence is that you will have to slow down the process because cooling won't be quite as fast. I have seen feedthroat temperatures up to 80 degrees (27 deg C) with no problems on smooth-feed extruders. As long as you can prevent bridging you might be able to run even warmer, but this is resin- and process- dependent. IP: Logged
mittul143 Senior Member Posts: 11 From:ahmedabad, gujarat, INDIA Registered: May 2005	posted May 30, 2007 08:30 AM Dear sir, Thank you very much for your reply. Regards, Mitul Chavda. IP: Logged

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