|
Author
|
Topic: PVC Formulating,Compounding,Processing,Testing
|
2beeps
Junior Member
|
posted 06-28-2001 10:46 PM
   
Hi all.Here's a place where we can dialog on ALL PVC topics---resins, formulating, compounding, processing,environmental, and testing! Come on in and lets dialog!! Regards, Skip  IP: Logged |
DAN CRAWFORD
Junior Member
|
posted 07-02-2001 11:29 AM
Hi Skip,
I think I talked to you before @ PlasticsNet.
You had a buisness web site. I reformated and lost it. Could you post it or send it to me?
I am interested on the process of wood flour as a suspension filler. I think that this is an excellant product line idea for a wide range of product lines. There seems to be many problems with material consistancy and moisture. I just thought it might be an interesting topic to start. [This message has been edited by DAN CRAWFORD (edited 07-02-2001).] IP: Logged |
2beeps
Junior Member
|
posted 07-02-2001 01:26 PM
Hi Dan,Good to hear from you!
My little web site is:
www.pvc-technical-services.bigstep.com
but since they plan to charge fees for what up to now was free, it'll be dropped by the end of July, I think.  So whatever info you want to download needs to be done soon. The use of wood flour in rigid PVC (also HDPE) for synthetic lumber profiles is a very hot, new growing area--we had several papers at SPE ANTEC on the subject. Fencing, decking, and a host of other new products are being introduced. You are correct that moisture becomes one of the main problem areas in extruding with large amounts of wood flour in the resin. I understand most wood flour-depending on type of wood, contains 5-8% moisture--and needs to be pre-dried down to at least 2%, which a good vented extruder can handle. Alot of R&D is going on in this area! Regards,
Skip [This message has been edited by 2beeps (edited 07-02-2001).] IP: Logged |
admin2
Junior Member
|
posted 07-02-2001 09:53 PM
Indeed there is alot of work in this area. In fact no technology has at this point emerged as a leader. In my experience, a twin has been successful in removing the moisture, followed by introduction of the polymer thru a downstream combi barrel segment. Provided your pelletizing the twin should probably develop enough pressure, however for direct profile a twin/single cascade arrangement shows promise (albeit at a hefty price tag).IP: Logged |
Contact Us | Feed Screw Designs
Powered by Infopop www.infopop.com © 2000
Ultimate Bulletin Board 5.45a
|
