volume 37 spring 2012 message from the tpc of extrusion ... · cused on single screw extrusion and...

Spring 2012

Volume 37

Number 1

Inside this issue:

ANTEC

2012

3-7

Book Re-

view 8

In Memory

of Dr. David

B. Todd

9-

10

Stay Con-

nected to

the Extru-

sion Divi-

sion

11

Upcoming

Webinars

12

Variable –Depth

T/C

13

SPE FastTrack

Training Program

15

Message from the TPC of Extrusion Division for ANTEC 2012

Once again ANTEC and NPE will be co-located, this time in sunny and warm Orlando, Florida. But of course it is not just the weather that will be spectacular; we will have the largest technical confer-ence in the plastics industry combined with greatest plastic trade show in the Americas. You will have the opportunity to be kept abreast of the latest technology advances while being able to pre-view the latest in equipment, materials, and services our industry has to offer. Contributing to this plastics technology extravaganza, your Extrusion Division has eight great technical sessions planned for ANTEC 2012. We start our program on Monday morning with something really new — two troubleshooting sessions: one fo-

cused on single screw extrusion and the other on twin screw extrusion. Following in the afternoon we have a joint session with Flexible Packaging on innovation in extrusion processing running parallel with a session on the fundamentals of extrusion processing. On Tuesday morning we hit the road running with sessions on single screw extrusion and dies and films. In the afternoon we continue with a session of twin screw extrusion and a second session on dies and films. The twin screw session (T23) will be especially heart-felt as it is offered in memory of the recently departed Dr. David B. Todd, an inter-nationally recognized engineer and a friend, colleague and mentor for many of us. We are honored to have two keynote speakers as part of the Extrusion Division’s tech-nical program. On Monday afternoon (Session M24) Professor Joao Maia from Case Western Reserve University will review the state of on-line sensoring in extrusion-based processes and discuss the efforts of his team to develop and implement ad-vanced on-line sensor technology. Then on Tuesday afternoon (Session T23) Dr. Paul Andersen from the Coperion Corporation will describe the continuing history of tech-nical advances in what many might consider a “mature” twin screw extruder industry. Both of these presentations are sure to be interesting and generate excitement. And…to celebrate the accomplishments of contributors to our industry, the Extrusion Division will once again host its Annual Business Meeting and Awards Reception. This will start at 5:30 PM on Tuesday evening. Hors d’oeuvres and refreshments are on us. So be sure to stop by…meet old friends, make new friends, celebrate the accomplish-ments of some of the “greats” of our industry…and…have a good time. We look for-ward to seeing you there! Joe Golba Technical Program Chair, Extrusion Division for ANTEC 2012 [email protected]

Extrusion Division—Society of Plastics Engineers

Message from the Extrusion Division Chair

The board held its winter meeting in Phoenix in late January (pictures below). We had a very

productive meeting. I am excited about the many initiatives we have underway to enhance our

mission of providing knowledge and networking opportunities to our members:

Joe Golba, this year’s ANTEC technical program chair for the division, has put together a

great program for ANTEC, to be co-located with NPE in Orlando in early April. The quality of

the papers submitted for our sessions was outstanding. Many thanks to the authors, and to Joe

and the Paper Review Committee for reviewing the papers and working with the authors to get

the papers finalized. By the way, being a member of the Paper Review Committee is a great

way to get involved with the Division. Just contact me or one of the board members if you like

to be considered for next year’s ANTEC.

Don Dunnington of K-Tron led the board through an indoctrination of the use of social

media and other tools to reach young professionals. Special thanks go out to Don, and to Jaime

Gomez for lining up Don as our guest speaker. Mark Wetzel is leading a team looking at how to use these tools to

attract more young professionals to our division.

As part of this effort to use the new media, Karen Xiao has created a new blog for the division. Check it out at

http://speextrusiondivision.wordpress.com

We have created a new webinar series on fundamentals of extrusion that is deeply discounted for our Division’s

membership. Eldridge Mount has led the effort and many of our board members will be presenters. Look for an-

nouncements in this newsletter and elsewhere. The discount alone is enough to justify your membership.

The board is developing ideas to extend our support for extrusion education beyond the highly successful Lew Er-

win scholarship. Look for more details on this during the year.

We continue to add content to our website such as the newly created Classic ANTEC section, a feature dedicated to

bringing back some of the works that influenced the growth and development of the extrusion process. Check it out

at http://www.spexdiv.com/ We are working on a long range plan to upgrade the look of our website, including

adding the capability of members to contribute to the Extrusion Wiki.

Our board continues to contribute the Society’s leadership. Greg Campbell, our councilor, has been elected to the

Executive Committee. Mark Wetzel has been appointed by the board to fill out Greg’s term as councilor. Mark

Spalding is the national ANTEC Technical Program Chair once again this year and will receive the Honored Ser-

vice award at ANTEC.

Look for a Minitec on Extrusion in the fall. Details to come soon.

Barry Morris

Chair — SPE Extrusion Division

http://speextrusiondivision.wordpress.com/

http://www.spexdiv.com/


Top 5 Reasons to Attend ANTEC

1. Broaden Your Understanding of the Plastics Industry - Attend sessions exploring the full

spectrum of the plastics industry. ANTEC is the place to gain exposure to developments and

people from throughout the entire industry.

2. Network - Meet with fascinating, informed and creative colleagues from around the world to

share insights from a broad range of disciplines and industries within plastics.

3. Visit with Exhibitors - Walk the tradeshow floor and talk with representatives from leading

companies who offer solutions for your business.

4. Understand the Impact of New Technology - Confer with the plastics industry's leading ex-

perts to learn what new technologies and techniques are being developed today.

5. Build New Skills - ANTEC offers seminars, workshops and other forums for people of all levels

within the plastics industry. Take advantave of one or more of our special sessions to enhance

your skills and increase your knowledge.

The Extrusion Division launch of the first Extrusion Wiki in early 2009 has met with broad acceptance.

Board of Directors Member Michelle Curenton was instrumental in developing the Wiki. The Extrusion

Wiki will allow you to search a vast database of information concerning extrusion as well as being able to

submit additional content.

Check it out by clicking here!

http://www.extrusionwiki.com/

http://www.extrusionwiki.com


Come network with your colleagues at the

Extrusion Division Awards Reception on Tuesday afternoon, April 3rd!!

Time Topic Speaker

Monday After-noon

1:30 PM

On-Line Sensoring in Extrusion-Based Processes: Past, Pre-sent and Future

Prof. Joao Maia Case Western Re-serve University

Tuesday Af-ternoon 1:30 PM

Co-rotating Fully Intermeshing Twin-Screw Extruders: Ad-vancements for Improved Performance and Productivity

Dr. Paul Andersen Coperion Corpora-tion


ANTEC Program

Monday — April 2, 2012

Monday

AM Troubleshooting – Single Screw Extrusion – M8

Moderator Eldridge Mount

Time Manuscript Title Submitting Author

8:00 Troubleshooting Rate Limitations for Melt-Fed Single-Screw Extruders Mark Spalding

8:30 Effect of Material Viscosities on Purging in Extrusion Processes Janina Overbeck

9:00 Techniques for Troubleshooting and Analysis of Blown Film Relative to

Property Development Greg Campbell

9:30 Troubleshooting Coex Film Problems By Considering Process-Property

Relationships Barry Morris

10:00 Troubleshooting TPU Extrusion for Rate Limitations Due to Solids in the

Extrudate Kun Hyun

Monday

AM Troubleshooting – Twin Screw Extrusion – M9

Moderator Jaime Gomez


8:00 Troubleshooting Plastics Industry Powder Storage & Handling Problems

Using Flow Properties Brian Pittenger

8:30 A Practical Guide to Scale-up of New Products from Development to Manu-

facturing Jeff Cicerchi

9:00 Troubleshooting the Co-rotating Twin-Screw Extruder Rich Kanarski

9:30 Tips for Optimizing Twin-Screw Extruder Performance Bert Elliott

10:00 New Developments in Co-Rotating Twin-Screw Extrusion Elements for

High Wear Applications Tom Kvinge

Monday PM Innovation in Extrusion Processing – Joint Session with Flexible Packaging Division – M24

Moderator Michelle Curenton


1:30 On-Line Sensoring in Extrusion-Based Processes: Past, Present and Future Joao Maia

2:00 An Easy Approach of Measuring the Residence Time Distribution with the

Use of NIR-Spectroscopy Andreas Witschnigg

2:30 Melt Extrusion of a Pharmaceutical Compound Containing a Poorly Soluble

Thermolabile Drug Adrian Kelly

3:00 Processed-Structure-Property Relationship in Solid-State Shear Pulveriza-

tion: Parametric Study with Neat Polypropylene Katsuyuki Wakabayashi

3:30 Preparation and Characterization of PP-PET Sea-Islands Type Biocompo-

nent AS-Spun Fibers by High Speed Melt Spinning Wan-Gyu Hahm

4:00 Self-Reinforcement of Uniaxially Stretched Polycarbonate Film Andrea Wibbeke

4:30 Geometry of Triple Screw Extruders to Promote Mixing Yingsheng Xing

5:00 The Effect of Machine Direction Orientation on Multilayer High Barrier

Films Danielle Frojo


ANTEC Program

Monday — April 2, 2012

(Continued)

ANTEC Program

Tuesday — April 3, 2012

Monday PM Fundamentals in Extrusion Processing – M25

Moderator David Bigio


1:30 Look Upstream to Avoid 'GIGO' Pitfalls in Extrusion Jaime A. Gomez

2:00 Practical Heat Transfer Implications of Slip Boundary Conditions Estanislao Ortiz-Rodriguez

2:30

Investigation of Die Drool Phenomenon for Linear HDPE Polymer Melts Hav-

ing Identical Polydispersity Indexes But Different MZ+1 Average Molecular

Weights

Martin Zatloukal

3:00 Notes on the Micropelletization of Polymer Resins William Aquite

3:30 Rheology and Melt Fracture of Poly(Lactides) Savvas Hatzikiriakos

4:00 Investigation of Processing and Rheological Parameters Effect on Film Blowing

Process Stability by Using Variational Principles Martin Zatloukal

4:30 Drop of Pressure of Polymer Melts in Microscopic Channels Thomas Ottnad

5:00 Computer Simulation of Rubber Extrusion in the Capillary Die Using Viscoe-

lastic Models Min-Young Lyu

Tuesday

AM Single Screw Extrusion – T6

Moderator Steve Schick


8:00 Lateral Stress and Density Measurements for PC, ABS, HIPS and PP Bulk

Resin Feed Stock Steve Derezinski

8:30 Improved Approximations in Thermal Properties for Single Screw Extrusion Maria Noriega

9:00 Improving Thermal Efficiency of Single Screw Extrusion Adrian Kelly

9:30 A Fully Three-Dimensional Numerical Approach Simulating the Melting Zone

in a Single-Screw Extruder Sebastian Grammer

10:00 Examination of the Performance of a High Speed Single Screw Extruder for

Several Different Extrusion Applications John Christiano

Tuesday

AM Dies & Films I – T7

Moderator Ken Forzaiti


8:00 Comparison of Water-Quench Versus Air-Quench Blown Film Processes -

Part I: Flat Film Properties Robert Armstrong

8:30 Comparison of Water-Quench Versus Air-Quench Blown Film Processes -

Part II: Thermoformability Robert Armstrong

9:00 Thickness Profile Effects on the Build-up Process of Film-Rolls in the Wind-

ing Process Felix Heinzler

9:30 Optimization and Sensitivity Analysis of a Film Die Hossam Metwally

10:00 Improved Film Die Flow Uniformity Using Optimization Methods Coupled

with Finite Element CFD Analysis Patrick C. Lee


ANTEC Program

Tuesday— April 3, 2012

(Continued)

Tuesday PM Twin Screw Extrusion – In Honor of David B. Todd – T23

Moderator Costas Gogos & Kun Hyun


1:30 Co-rotating Fully Intermeshing Twin-Screw Extruders: Advancements for

Improved Performance and Productivity Paul Andersen

2:00 Distribution of Specific Energy in Twin-Screw Corotating Extruders Using

One-Dimensional Process Simulation Adam Dreiblatt

2:30 Variable Strength Stress Bead Analysis in a Twin Screw Extruder David Bigio

3:00 Chain Extension of Low Viscous PA 66 in Reactive Extrusion Process in

Order to Extrude Thick-Walled Pipes Dan Zhang

3:30 Kinetic, Thermodynamic and Structural Factors Governing the Dispersion of

Nanoclays in Polymer Melts Mark Wetzel

4:00 Viscoelastic Properties of CNT-PC Compounds: Effect of Compounding

Method, CNT-Type and Testing Protocol Joe Golba

4:30 Experimental Investigations on Vane Extruder for Polymer Short Thermo-

mechanical History Processing Qu Jin-ping

Tuesday PM Dies & Films II – T24

Moderator Karen Xiao


1:30 A New Flow Channel Design of Film and Sheet Extrusion Die Masaki Ueda

2:00 Effect of Typical Melt Temperature Non-Uniformity on Flow Distribution in

Flat Dies Olivier Catherine

2:30 Extrusion Dies for Wide Operating Range by Automatic Die Design Kenny Saul

3:00 Simulating the Parison Geometry in Extrusion Blow Molding with Viscoelas-

tic Material Models Christian Windeck

3:30 Flow Instability in Multi-Layer Cable Coating Dies Jiri Vlcek

4:00 Effect of Polymer Viscosity on Post-Die Extrudate Shape Change in Coex-

truded Profiles Mahesh Gupta

5:00 ExDiv Meeting, Awards, Wine & Cheese Reception


Book Review By

Mark A. Spalding The Dow Chemical Company

Extrusion of Polymers, Theory and Practice Chan I. Chung

2nd Edition

This book focuses on the fundamentals and design of single-screw

extruders, providing the reader with the necessary tools for basic

equipment design. The first three chapters provide basic knowledge

for single-screw extruders, twin-screw extruders, and polymer sci-

ence. These chapters set the stage for Chapters 4 and 5 for theories

on single-screw extrusion, screw design, scale-up, and high perfor-

mance screw designs. Prof. Chan Chung was one of the original in-

novators in barrier screw designs and the co-inventor of the very

successful Energy Transfer (ET) high performance screw. Three new

chapters were included with the second addition: i) Viscoelastic Ef-

fects of Melt Flow written by Joseph Dooley, ii) Die Designs, and

iii) a chapter on a Special Single-Screw Extruder with Channels on

the Barrel. Dooley’s viscoelastic effects chapter provides experi-

mental and numerical details for layer rearrangement of multi-layer

structures due to normal forces. The chapter on dies provides details

for many commercially available dies and their operation. Multilayer

feedblocks and coextrusion are covered. The book is a valuable asset

to designers and engineers working in the field of single-screw

screw extrusion and dies.

Proceeds from the sale of this book are donated to the SPE Extru-

sion Division — Thank you, Prof. Chung!

Extrusion

In Memory of Dr. David Burton Todd

(1925 – 2012)

David Burton Todd, PhD, (86), an internationally recognized chemical engineer, passed away February 1, 2012, at his home in West Wind-sor, NJ. He had lived in the Princeton and West Windsor area since 1987. Born in Chester, PA, David B. Todd grew up in Freedom, ME. He re-ceived his B.S. and M.S. degrees in chemical engineering from North-western University, and his PhD from Princeton University. A year of his graduate work was spent as a Fulbright scholar in Delft, Nether-lands. He enlisted in the Navy in World War II, served in the North At-lantic and retired from the Naval Reserve as a Commander in 1972. Dr. Todd's professional career spanned 60 years; he never successfully

retired. Initially he was employed in California as an engineer, then supervisor, at a Shell Oil research facility. He moved to the Chicago area to become Manager of Engineering at the Podbielniak Division of Dresser Industries in 1963, before becoming Technical Director in 1967 at Baker Perkins, an equipment manufacturer in Saginaw, Michi-gan. Upon transfer to the New Jersey branch, he was promoted to Vice President, Technology. In 1989, Dr. Todd founded Todd Engi-neering to provide consulting services, primarily to the plastics indus-try. He served as principal consultant to the Polymer Processing Insti-tute (PPI), as an adjunct professor at Stevens Institute of Technology in Hoboken, and later as a research professor at New Jersey Institute of Technology in Newark. Dr. Todd was active in professional organizations, being elected to the grade of Fellow in the American Institute of Chemical Engineers and in the Society of Plastics Engineers. He was a member of the American Chemical Society, the Naval Institute, and the international Polymer Processing Society, receiving several awards for his technical contributions. He received 22 U.S. patents and authored more than 100 technical articles. His book Plastics Compounding: Equipment and Processing was translated into Chinese.


In Memory of Dr. David Burton Todd

(1925 – 2012)

Dr. Todd also actively participated in civic affairs. In Michigan, he served on the boards of the Saginaw Symphony, the United Way, and several township school boards. He helped found Group Health Service (an HMO) and served as chairman of the board of directors until its acquisition by Blue Cross. He served for seven years on the Environmental Commission of Montgomery Township, NJ. Dr. Todd is survived by his wife, Mari-lyn Sweeney Todd. He was previously married to Mary Boekhoff Todd, who

predeceased him in 2000. His sister, Mary Todd Pfeifer, McMinnville, OR, survives him. Surviving also are his daugh-ter Rebecca Todd and son-in-law Charles Klein in Berkeley, CA; three sons and daughters-in-law: Brian and Denise Todd in York, PA, Raymond Todd and Kelley Lehman in Indian Hills, CO, and Clifford and Tina Todd in Midland, MI; five grandchildren; three step-daughters and their husbands: Ja-net and Daniel McCallum, Kathy and Chris Miano, and Ellen and Steve Allsteadt; and five stepgrandchildren.

A Celebration Of Life service will be held on Saturday, March 10, at 2 p.m., at the Unitarian Universalist Congregation of Princeton.

Memorial contributions may be made to the Unitarian Universalist Congregation of Princeton, 50 Cherry Hill Road, Princeton Township, NJ 08540, (609) 924-1604, or to the Hospice Program of Prince-

ton HomeCare Services, 208 Bunn Drive, Princeton, NJ 08540, (609) 497-4900.


Click the links below to connect you directly to our pages!

FOLLOW US ON

SPE EXTRUSION DIVISION

BLOG PAGE

Cincinnati Milacron Extru-sion Systems/Milacron LLC 4165 Half Acre Road Batavia, OH 45103 Phone: (513) 536-2000 E-mail:

Cincinnati Milacron Extrusion Sys-

Milacron is a leader in providing extrusion technology for Plastics & Bio-

Fiber Composite applications. Focus is on applying extensive twin & sin-

gle screw technology to extrusion process needs. Capabilities range from

complete systems to unit extruders, as well as barrels & screws and retro-

fit systems for productivity improvements/upgrades to existing Milacron

Visit SPE Extrusion Division’s NEW WEBSITE

http://www.linkedin.com/groups/SPE-Extrusion-Division-3898386?trk=myg_ugrp_ovr

http://www.facebook.com/pages/SPE-Extrusion-Division/130403997035584#!/pages/SPE-Extrusion-Division/130403997035584



http://www.exdiv-spe.com/

http://www.4spe.org/


TOPIC DESCRIPTION PRESENTER

1 Basic mechanisms

of single screw ex-

truders

This session will focus on the solids conveying, melting

and metering functions of a single screw extruder and

how these functions combine to determine the perfor-

mance of a single screw design

Dan Cykana

2 Understanding and

measuring Extruder

Performance

This session will focus on the measurement, plotting and

understanding of extrusion performance measurement.

The participant will learn what to measure, how to meas-

ure the important parameters and how to interpret the da-

ta and use it to determine the suitability of the screw de-

sign for their process

Tim Womer

3 Rheology and poly-

mer flow

This session will focus on the development of basic un-

derstanding of the flow characteristics, rheology, of poly-

mers. In order to predict the output of an extruder that is

attached to a die, the rheology of the polymer must be

understood to be able to calculate the back pressure effect

from the die on the pumping ability of the screw. Newto-

nian and power law rheology will be explored and the

concepts of stress and strain rate will be developed. The

effects of shear rate and melt temperature on the viscosity

will be developed and their effect on the screw’s de-

signed expected output demonstrated

Greg Campbell

4 Review of Screw

design technology

This session will focus on the screw designs used in ex-

trusion. Various types of screw designs will be described

in terms of their controlling concepts of operation and the

impact the design features have on overall performance.

Standard, barrier, energy transfer and other screw designs

will be described

Steve Derezinski

5 Up grading the ca-

pacity of an existing

extrusion system

This section will show how to evaluate an existing screw

design and determine the maximum output available.

Next, how to specify the increase in extruder output and

determine which screw technology to use for the increase

in system output, In addition, to determine the capability

of the drive necessary to increase the output and if neces-

sary how to increase the drive capacity for the higher out-

put. In addition how to estimate the increase in head

pressure from the down stream equipment to determine if

a need exists to modify the die and melt piping.

Mark A. Spalding

6 Extrusion Safety

This section will review the prudent safety concerns asso-

ciated with single screw extrusion systems

Eldridge Mount

Stayed Tuned for the Upcoming Webinars

Brought to you by the Extrusion Division


Underappreciated tool: Variable-Depth Melt Thermocouple By

Charlie Martin Leistritz

Polymer flow through a melt pipe rarely has a uniform temperature throughout the cross-section. There is almost always a gradient, generally with higher melt temperatures some distance in from the pipe wall. This gradient may be negligible, or it can be 40ºC or even higher. With any extru-sion system making a finished product a temperature gradient can cause big problems, mainly from varying viscosities entering the die at different points across the flow bore. The simplest tool avail-able for measuring the melt temperature gradient is a Variable-Depth Melt Probe.

These devices generally have a bad reputation in the industry be-cause, by their nature, they have a short lifespan (polymer often creeps up inside the moveable center probe within a few days and seizes it in one position). Even with this limitation though, it’s an extremely useful tool. If the probe only works even one day you can run a series of experiments and acquire data that’s near priceless, and that you can’t get any other way. One immediate way gradient data can be used is to find out what temperature to set the melt pipe zone set-points. For instance if the melt pipe zones have been set at 180ºC and you find that the center core of the melt flow is at 225ºC, that’s a significant gradient. You’ll gen-

erally attain far more uniform die flow by raising the pipe set-points to 220-225ºC, to reduce the temperature gradient. Even though 225ºC may be higher than desired, the variable probe shows that most of the flow is at that temperature anyway regardless of the pipe wall setpoint. This is just another demonstration of the fact that colder melt pipes can’t be used to cool the melt, because of laminar flow and the fact that most polymers are outstanding insulators.

Additional Platinum SponsorsAdditional Platinum Sponsors

ACS GroupACS Group

http://www.ktron.com/

http://steeramerica.com/


Additional Extrusion Division Sponsors

Additional Gold SponsorsAdditional Gold Sponsors

NDCNDC

Teel PlasticsTeel Plastics

Silver SponsorSilver Sponsor

Polymer Center for ExcellencePolymer Center for Excellence

Would you like to support the Extrusion Division?

Please contact Dan Smith at

[email protected]


Newsletter Sponsorships are available

from Bronze through Platinum.

Check out the SPE Website for valuable

information for all members

Highlight your company by becoming a Newsletter Sponsor.

Contact Dan Smith or any Extrusion Division Board member for more information.



mailto:[email protected]


2012 SPE Extrusion Division Board

Andersen, Paul G., Ph.D. Coperion Corporation [email protected]

Anzini, David Zip-Pak [email protected]

Biesenberger, Jeff Advanced Drainage Systems [email protected]

Bigio, David I., Ph.D. University of Maryland [email protected]

Campbell, Gregory A., Ph.D.

(Executive Committee)

Clarkson University [email protected]

Christiano, John Davis-Standard LLC [email protected]

Curenton, Michelle

(President/Chair-Elect)

Solo Cup [email protected]

Cykana, Daniel Extrusion Solutions, LLC [email protected]

Derezinski, Stephen J., Ph.D. Extruder Tech, Inc. [email protected]

Golba, Joseph C., Jr., Ph.D. PolyOne [email protected]

Gomez, Jaime KTron [email protected]

Gould, Russell J. RG Associates [email protected]

Karszes, William Plastics Associates [email protected]

Larson, Keith ACS Colortronics [email protected]

Martin, Charlie Leistritz [email protected]

Mchouell, Tom Polymer Center for Excellence [email protected]

Morris, Barry A., Ph.D.

(President/Chair)

DuPont [email protected]

Mount, Eldridge, III, Ph.D. EMMOUNT Technologies [email protected]

Oliver, Gary Extrusion Dies Industries [email protected]

Perdikoulias, John, Ph.D. Compuplast Canada [email protected]

Puhalla, Mike Milacron Incorporated [email protected]

Sagar, Surendra Macro Engineering & Technology

Inc.

[email protected]

Schick, Steven F. Teel Plastics Inc. [email protected]

Schildknecht, Helmut List Incorporated [email protected]

Smith, Daniel Maag [email protected]

Spalding, Mark, Ph.D. The Dow Chemical Company [email protected]

Wagner, John R., Jr.

(Treasurer)

Crescent Associates [email protected]

Wetzel, Mark

(Past President/Chair,Councilor)

DuPont [email protected]

Womer, Tim TWWomer & Associates, LLC [email protected]

Xiao, Karen, Ph.D. Celgard LLC [email protected]







https://mail.be-ca.com/owa/redir.aspx?C=c3ee5b65da1d402bb447976cac618134&URL=mailto%3aDanielCykana%40aol.com

mailto:steve@extrudertd
















Extrusion Division

Society of Plastics

Engineers

“The objective of the Extrusion Division shall be to

promote the scientific and engineering education and

knowledge relating to the extrusion of plastics.”

Looking for answers to your technical questions? Ask

Industry Experts at the Extrusion Division Website:

“Ask the Experts”

Newsletter questions or comments

contact:

Karen Xiao

Celgard LLC

13800 South Lakes Drive

Charlotte, NC 28273

[email protected]


http://www.spexdiv.com/4213.html


volume 37 spring 2012 message from the tpc of extrusion ... · cused on single screw extrusion and...

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