Re: Extruder Screw Design

PAUL wrote:
> Can someone explain to me the major differences between a screw which
> is designed for LDPE and one which is designed for Propylene. Is it
> possible to have a screw which will extrude both resins half decent.
>
> Thanks

It depends on the application and the specific grades of each resin, percent
crystalinity, MFI, expected ourput rates needed and drive HP among other
things.

The short answer is yes, you can either do half decent though it may be more
profitable to spend a few bucks up front and do each one very well.

-- 
____________________
Lawrence Alpert
Manager, Extrusion
Boston Scientific
Fremont, CA