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Author | Topic: co extrusion |
jackie Member Posts: 4 |
posted October 07, 2003 06:45 AM
Can I co extrude Polystyrene with Polyethylene without a tie layer as I only have a twin screw extruder. IP: Logged |
charliehagee Senior Member Posts: 5 |
posted October 07, 2003 09:19 AM
PS and PE will not stick together. You need a tie layer. If you need a co-extruder, feedblock or die, contact www.waynemachine.com IP: Logged |
jackie Member Posts: 4 |
posted October 07, 2003 10:50 AM
Thanks charlie but is there no additive that I could use in my main blend that would help adhesion IP: Logged |
Tom C Moderator Posts: 219 |
posted October 07, 2003 11:06 AM
Are you trying to extrude a form or pellet? What type of twin screw? Tom Cunningham IP: Logged |
jackie Member Posts: 4 |
posted October 07, 2003 11:27 AM
I am trying to extrude pellets to make a film with a base of around 400 micron ps with a 40 micron pe layer I am using an extruder with a 120MM pp screw with an LD of I think 33/1 but am unsure about the second screw but it delivers about 10% of the main one hope this is of some use. IP: Logged |
Tom C Moderator Posts: 219 |
posted October 07, 2003 05:35 PM
Jackie, There is a bit of terminology incompatibility here, but we can work through it. You don't have a twin screw extruder. What you have are two single screw extruders in a co-extrusion configuration. When you have two incompatible polymers such as PS and PE they will not stick together. Seems like a strange combination anyhow. What are you trying to make? Tom C IP: Logged |
jackie Member Posts: 4 |
posted October 08, 2003 03:21 AM
Thanks for all the interest, and sorry about the confusion. I am trying to make a film with a ps base and pe layer to replace a laminated material. Base around 400 micron and pe around 40 micron. IP: Logged |
allsurplusworld Senior Member Posts: 7 |
posted October 10, 2003 11:45 PM
quote: Attn Chief Engineer compounding plant for sale, incl. 9 extruders and polymerisation details in www.allsurplusworld.com/abs Register in www.allsurplusworld.com and get access to over 70.000 registered companies Sincerely IP: Logged |
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