MatWeb - Material Property Data Advertise with MatWeb!     Register Now
Data sheets for over 155,000 metals, plastics, ceramics, and composites.
MatWeb - Material Property Data HOME  •   SEARCH  •   TOOLS  •   SUPPLIERS  •   FOLDERS  •   ABOUT US  •   FAQ  •   LOG IN    
Recently Viewed Materials (most recent at top)  

Login to see your most recently viewed materials here.

Or if you don't have an account with us yet, then click here to register.

  Searches:   Advanced  | Category  | Property  | Metals  | Trade Name  | Manufacturer  | Recently Viewed Materials
  
Amatrium Materials AI
DuPont DPE® 6611 Purge Compound
Categories: Polymer; Thermoplastic; Polyethylene (PE); Purging Compound

Material Notes: DPE® 6611 is a fractional melt index low density polyethylene resin that contains various additives to assist in purging and cleaning the extruder. This polymer is formulated with agents to help it wet and scour metal surfaces within the extrusion system. It also contains a blowing agent which helps to disrupt normal flow patterns and enhance scouring action. The resin normally will foam, snap, and crackle as it leaves the die. A somewhat fishy, ammonia smell is detectable from the extrudate and feed hopper. When extruded, the resin has a grayish brown color and a very high viscosity at the die exit.

Applications: DPE® 6611 is not required for normal transitions into and out of Surlyn® ionomer resins, Nucrel® acid copolymer resins, and other common polyolefins. The Disco Purge Procedure* is recommended for use during these normal transitions, and special purging compounds such as DPE® 6611 are not part of this procedure. There are instances, however, when it is practical to use a special purging compound like DPE® 6611. Examples include: Cleaning particularly dirty extruders. Removing die lines caused by oxidized polymer deposits. Purging extruders that have chronic purging problems (gels) following runs of Surlyn® resins, Nucrel® resins, Elvax® ethylene vinyl acetate resins, or other specialty resins. Consulting your technical representative is also highly recommended for these cases. Purging prior to extrusion jobs that are particularly sensitive to gels. Facilitating purging for shutdowns when normal Disco Purging has not proven effective. A shutdown is any period of time when the extruder will be completely turned off, such as a weekend or maintenance outage. It is very important that specialty copolymers such as Surlyn® and Nucrel® be completely purged before such a shutdown, as the cool-down, heat-up, and soak periods allow plenty of time to cause significant gel problems. Facilitating rapid removal of pigments from the extruder. DPE® 6611 has also been used to facilitate pulling and cleaning large diameter extrusion screws. However, acrylic purge material is normally used for this purpose. The high viscosity of DPE® 6611 lends itself to easy cleaning of hardware during disassembly, because it peels rather than smearing along the metal surfaces. Although most frequently used on flat die extrusion equipment, DPE® 6611 can also be used for round die converting equipment as well. It can be difficult to purge DPE® 6611 out of standard spiral-fed blown film dies, unless a very low melt index polyethylene is available for this purpose (0.5 MI LDPE or 1.0 MI LLDPE). To activate the blowing agent, the resin must be extruded above about 221°C (430°F). Purging efficiency may be somewhat reduced if the resin does not foam.

Information provided by DuPont Packaging Polymers.

DuPont and Dow have completed their merger but further transactions/spinoffs are planned.

Vendors:
Available Properties
  • Processing Temperature, Minimum temp required to activate blowing agent.
  
Property Data

This page displays only the text
of a material data sheet.

To see MatWeb's complete data
sheet for this material (including
material property data, metal
compositions, material suppliers,
etc
), please click the button below.

Manufacturer Notes:
DuPont Packaging and Industrial Polymers

Category Notes
Plastic

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

 

Lab Instruments
Please read our License Agreement regarding materials data and our Privacy Policy. Questions or comments about MatWeb? Please contact us at webmaster@matweb.com. We appreciate your input.

The contents of this web site, the MatWeb logo, and "MatWeb" are Copyright 1996-2022 by MatWeb, LLC. MatWeb is intended for personal, non-commercial use. The contents, results, and technical data from this site may not be reproduced either electronically, photographically or substantively without permission from MatWeb, LLC.