Technical sessions

Plastics Engineering, March, 2003

MONDAY MORNING

May 5

SESSION M1

Color and Appearance

Color and Appearance

Moderator: Bob Trinklein - Teknor Color

(8:00 AM) Keynote Speaker Evolution of Color Quantification Harold, Richard

#1272 (9:00AM)

Pigments for Food Packaging - A Regulatory Journey

Jackson, Donna - Eastman Chemical Company

How one company handles the day-to- day compliance reviews of new and modified products, including the use of the threshold of regulation and foodcontact notification submissions is reviewed.

#679 (9:30 AM)

NanoColorants - More Than Colored Nanoparticles

Boehm, Arno J.; Glaser, Alban and Koch, Oliver - BASF

These are nanocomposites consisting of hydrophobic dyestuffs molecularly dispersed and immobilized in highly crosslinked nanosized polymer particles prepared by a modified miniemulsion polymerization process.

#793 (10:00 AM)

Virtual Color - The Future of Color Matching in Our Industry Russell, Scott O. - PolyOne Corporation

A new way to look at color matching is based on improved methods and simple to use, user interfaces.

#1194 (10:30AM)

Color and Appearance Measurement and Tolerancing Basics

Cameron, Joseph - RTP Company

Color and appearance are personal judgments that make measurements difficult.

SESSION M2

Extrusion

Dies

Moderator: David Anzini - PACTIV

#471 (8:00 AM)

Numerical Analysis of Wire Coating: Interactions Between Material

Rheology, Flow Domain And Process Conditions

Toure, B.; Baston, T.; Fournier, J.; Skabrahova, P. and Vlcek, J. - Nexans Research Center/Compuplast International

Die land and the die gap still are the most important parameters influencing the variables important for the die designers.

#480 (8:30 AM)

Measurement of Interfacial Instabilities during Coextrusion of LDPEs in Flat-Dies

Kopytko, Walter; Vlcek, Jiri and Zatloukal, Martin - Compuplast International, Inc./Tomas Bata University in Zlin

Wave instabilities may also depend on the overall stresses generated in the system and the amount of the stretching.

#91 (9:00 AM)

Compensating for Die Swell in the Design of Profile Dies

Gifford, W.A. - Dieflow

A fully three dimensional finite element flow algorithm along with quick mesh generating capabilities can reduce the number of trials in designing profile dies.

#579 (9:30 AM)

The Effect of Surface Energy of Boron Nitride on Polymer Processability

Rathod, Nimish S. and Hatzikiriakos, Savvas G. - University of British Columbia

The lubricious nature of BN along with an optimum balance of surface energy and polarity makes it successful in both surface melt fracture and gross melt fracture regions.

#1089 (10:00 AM)

Fundamentals of Melt Fracture Elimination using Fluoropolymer Process Aids

Oriani, Steven R. and Chapman, G. Richard - DuPont Dow Elastomers L.L.C.

The morphology of fluoropolymer -- polyethylene blends can be controlled to increase fluoropolymer deposition rate by using a new, rheology-modified fluoropolymer in combination with an interfacial agent.

#1276 (10:30 AM)

A Survey of Manifold Designs for Flat Die Extrusion

Oliver, Gary - Cloren

New commercial manifold designs try to solve age old problems with flow uniformity, die deflection, and coextrusion performance.

SESSION M3

Extrusion

Film

Moderator: John Vlachopoulos - McMaster University

#1077 (8:00AM)

Blown Film Characterisation Smith, Graham David; Martyn, Mike; Woodhead, Mike; Spares, Rob; Coates, Phil; Lafuente, Pilar and Fernandez, Bernardo del Amo - University of Bradford/Repsol-YPF

Profile analysis techniques were used to study the effect of process parameters such as barrel temperature, haul off rate, extruder screw speed and cooling airflow, on film properties.

#992 (8:30 AM)

Real-Time Estimation of Crystallization Half Time During Blown Film Extrusion and Its Influence on Final Film Properties Cherukupalli, Srinivas S. and Ogale, Amod A. - Clemson University

The reciprocal crystallization half time is a likely essential parameter to formulate processing-structure-property relationships.

MONDAY MORNING

May 5

#691 (9:00 AM)

The Effect of Orientation on the Mechanical Performance and Thermal Properties of Extrusion Cast Metallocene Polyethylenes Millar, B. G.; Mc Nally, G. M. and Murphy, W. R. - Queen's University Belfast

Samples with greater orientation in one direction had increased tensile strength, shrinkage and reduced tear strength in that direction.

#462 (9:30 AM)

Heat Transfer Analysis of a Blown Film Bubble

Campbell, Greg - Clarkson University

A corrected boundary layer thickness was calculated by incorporating the effect of the bubble radius growth.

#1166 (10:00 AM)

Process Stability Enhancement by Encapsulation Extrusion Method Lee, Joo Sung; Jung, Hyun Wook and Hyun, Jae Chun - Korea University

The undesirable neck-in and draw resonance phenomena frequently occurring in the extrusion of HDPE are due to its low-melt-strength, and consequently can be alleviated using high-melt-strength materials in the encapsulating dies.

#1167 (10:30 AM)

Stability and Nonlinear Dynamics of Film Blowing

Kim, Hyunchul; Lee, Joo Sung; Jung, Hyun Wook and Hyun, Jae Chun -Korea University

Two well-known force balances and a Phan-Thien Tanner constitutive equation are used for a systematic analysis of draw resonance.