SPE Library

The SPE Library contains thousands of papers, presentations, journal briefs and recorded webinars from the best minds in the Plastics Industry. Spanning almost two decades, this collection of published research and development work in polymer science and plastics technology is a wealth of knowledge and information for anyone involved in plastics.

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Conference Proceedings
A COMPARISON OF VELOCITY TO PRESSURE TRANSFER CONTROL STRATEGIES FOR INJECTION MOLDING
Art Schubert, May 2010
Injection molders commonly use a ram position setting to control switchover. As in-mold sensors have become more widespread, using them to control switchover ensures more consistent part quality than machine-based control.Herein we explore several control strategies applied to an array of different mold configurations and materials.We evaluate each method's ability to minimize in-cavity variation when material viscosity changes. The results provide the molder with information for choosing a control strategy appropriate to each application.
SIMULATION OPTIMIZATION APPLICATIONS IN INJECTION MOLDING
Oliver Henze, Erik Waßner, Rüdiger Krech, May 2010
A simulation optimization methodology based on design of experiments and metamodeling is applied to injection molding in this work. The proposed method is used first to select the best processing conditions for injection molding a Kodak disposable camera front plate; and, secondly to decide on the best injection gates configuration from three different injection scenarios, as well as the values of mold temperature and melt temperature for a real automotive part in order to minimize variability. The optimization results are discussed in light of the qualities of the simulation optimization method.
IMPROVEMENT OF TRANSPARENCY AND PROCESSING PROPERTIES OF HARD TPU MATERIALS
Oliver Henze , Erik Waßner , Rüdiger Krech, May 2010
A statistical model is discussed which will help to understand the sequence length distribution of thermoplastic polyurethane block copolymers. Using this model processing range and transparency of some TPU materials were correlated to the theoretical segment length distribution. Considering this analysis some new Elastollan® 1200 materials (E 1200 materials) were developed. Due to the wide processing range and the high transparency of these new materials they are suitable to an increased number of applications.
DESIGNING FOR DIVERSE LOADING CONDITIONS AND PREDICTABLE FAILURE IN A COMPOSITE HYDROFOIL
Wesley Petersen , Nicole Larson, May 2010
A hydrofoil is subjected to many unique and varied loading situations. It must both withstand design loads and fail in a way that does not pose a hazard to the vessel it is attached to or the operators and/or passengers on board. This research investigates designing for several loading situations, while an attempt is made to ensure potential failure occurs in a specific, predictable and contained manner
PHYSICAL FOAMING OF ELASTOMERS IN THE INJECTION MOLDING PROCESS
W. Michaeli, U. Masberg, May 2010
Besides material and cost reduction the production of foamed elastomer parts offers the possibility to adjust part properties by modifying the cellular structure. This paper describes the physical foaming of rubber from its first step which is the dissolving of inert gases in the material to the foaming itself, its necessary equipment and different ways of conducting the process. Furthermore it discusses how to obtain desired part properties by varying process parameters.
A REAL-TIME SYSTEM FOR THE INSPECTION OF TEXTURED SURFACES
Pavel Huta?, Martin Šev?ík, Luboš Náhlík, Ivaylo Mitev, Andreas Frank, Gerald Pinter, May 2010
Embossed or printed plastic surfaces are widely used as decoration elements. However, no inspection systems exist that can inspect products with irregular textures such as artificial leather or imitation wood. This paper describes a system for the inline inspection of extruded surfaces with irregular textures. By incorporating algorithms for texture analysis into an inspection system, defects can be reliably detected and classified at real-time.
SOFT TIP ABRASION RESISTANT PRY BAR FOR ROTATIONAL MOLDING
Yogesh Vakharia, May 2010
The current practice of using steel pry bars to open a rotational mold and de-mold the parts during the rotational molding process is one of the primary causes of damage to expensive aluminum molds and molded parts. Pry bars with soft but tough and abrasion resistant molded tips will reduce the mold damage during the de-molding process. Introduction
SOFT TIP ABRASION RESISTANT PRY BAR FOR ROTATIONAL MOLDING
Yogesh Vakharia, May 2010
The current practice of using steel pry bars to open a rotational mold and de-mold the parts during the rotational molding process is one of the primary causes of damage to expensive aluminum molds and molded parts.Pry bars with soft but tough and abrasion resistant molded tips will reduce the mold damage during the de-molding process.
ISOTHERMAL CRYSTALLIZATION STUDIES ARE ENHANCED BY DSC FAST COOLING
Andrew W. Salamon , Peng Ye , Kevin Menard, May 2010
Isothermal crystallization experiments provide useful information for applications concerning the processing of fibers films soda bottles and injection molding. This isothermal crystallization study demonstrates a new extraordinary and unique extreme-precision-cooling-rate of a Double Furnace Power Compensation DSC. This new cooling technique called Ballistic Cooling. Plastics foods pharmaceutical and other applications will benefit from these new cooling techniques.
ISOTHERMAL CRYSTALLIZATION STUDIES ARE ENHANCED BY DSC FAST COOLING
Andrew W. Salamon , Peng Ye , Kevin Menard, May 2010
Isothermal crystallization experiments provide useful information for applications concerning the processing of fibers, films, soda bottles, and injection molding. This isothermal crystallization study demonstrates a new, extraordinary, and unique, extreme-precision-cooling-rate of a Double Furnace Power Compensation DSC. This new cooling technique called Ballistic Cooling. Plastics, foods, pharmaceutical, and other applications will benefit from these new cooling techniques.
MEASUREMENTS OF BIAXIAL STRESSES DURING THE COMPRESSION OF BULK RESIN FEED
Aaron P. R. Eberle, Gregorio M. Velez, Donald G. Baird, Peter Wapperom, May 2010
Compression of the bulk solids feed resin is important in solids conveying in single screw extruders. The compressive stresses in the solid bed act with friction to produce solids conveying flow. Classically, the stresses have been assumed isotropic. However, a laboratory test given here demonstrates the biaxial stress in solids feed. Measurements were made of the biaxial stresses during compression for HDPE, LDPE, LLDPE, PET pellets, and PET powder, and the results are correlated with some extruder solids conveying performance.
MANAGEMENT 101: LEADERSHIP AND MANAGEMENT LESSONS LEARNED FROM MY YEARS IN CORPORATE AMERICA
Ivan D. Lopez, Fritz Klaiber, Tim A. Osswald, May 2010
Reductions in force, layoffs and early retirements have left a management and leadership voids in many corporations. As a result, many good candidates have been pushed into leadership positions without the training, skills development and/or experiences that their predecessors have had in the past. This article is intended to summarize a series of lessons learned from my management experiences during my twentyƒ??seven year tenure at Xerox Corporation.
SCRATCH-RESISTANT TRANSPARENT POLYCARBONATES WITH ECO-COMPLIANT FLAME PROPERTIES
Vandita Pai-Paranjape , André Van Zyl , Dake Shen, May 2010
Polycarbonate resins possessing high surface hardness and improved scratch resistance have been developed for injection molding applications. Due to their transparent nature and good balance of physical and mechanical properties these resins find applications in the business equipment mobile phone and electronic device industries. They also possess increased resistance to oxygen and / or water vapor migration making them suitable candidates for medical packaging. New developments in the area of flame retardancy will be discussed in this paper.
SCRATCH-RESISTANT, TRANSPARENT POLYCARBONATES WITH ECO-COMPLIANT
Vandita Pai-Paranjape , André Van Zyl , Jan Pleun Lens , Dake Shen, May 2010
Polycarbonate resins possessing high surface hardness and improved scratch resistance have been developed for injection molding applications. Due to their transparent nature and good balance of physical and mechanical properties, these resins find applications in the business equipment, mobile phone and electronic device industries. They also possess increased resistance to oxygen and / or water vapor migration, making them suitable candidates for medical packaging. New developments in the area of flame retardancy will be discussed in this paper.
BIAXIAL FORMING BEHAVIOR OF DECORATIVE FILM LAMINATES
A.K. Bledzki, M. Rohleder, H. Kirschling, May 2010
Biaxial Forming Behavior of Decorative Film Laminates
THERMOPLASTIC POLYIMIDE- POLYETHERETHERKETONE BLENDS WITH EXCEPTIONAL HIGH TEMPERATURE PROPERTIES
Kapil C. Sheth , Robert R. Gallucci , Gurulingamurthy Haralur, May 2010
New thermoplastic polyimide (TPI) ƒ?? polyetheretherketone (PEEK) blends improve high temperature load bearing capability and dimensional stability of PEEK. These phase-separated blends maintain PEEKƒ??s fast crystallization rate unlike other one-phase miscible PEEK blends. Blend compositions can be varied to tailor mechanical thermal flow and end-use properties for a wide-array of applications.
EFFECT OF MOLECULAR ORIENTATION INDUCED BY ULTRA-HIGH INJECTION SPEED ON SCRATCH BEHAVIOR OF POLYPROPYLENE (PP)
Peming Hsu, Jui-Pin Yang, Shyh-shin Hwang, Ying-Zhong Lai, May 2010
A linearly increasing load scratch test based on ISO 19252 was performed to study scratch behavior of injection molded polypropylene (PP) at different injection speeds of 10, 100, and 1000 mm/sec. The results showed that higher injection speed led to higher scratch resistance. Wide angle X-ray diffraction (WAXD) results showed that high injection speed induced higher crystalline orientation near the surface. It was found that highly oriented polymer chains caused higher scratch resistance.
THERMO-MECHANICAL STUDIES OF DOUBLE NETWORK ELASTOMERIC SYSTEM
Naveen K. Singh , Alan Lesser, May 2010
A new approach to prepare and characterize double network elastomeric system is investigated. A styrene-ethylene-co-butylene-styrene (SEBS) triblock copolymer system containing physical crosslinks is used to achieve a double network additional crosslinking using ultra-violet (UV) light. Results from conventional monotonic tensile tests and thermo-mechanical properties are presented.
STUDY ON DISPERSIBILITY OF CARBON NANOTUBES IN CHITOSAN COMPOSITES
Yeong-Tarng Shieh , Hong-Mao Wu, May 2010
The dispersibility of carbon nanotubes (CNT) in water of different pH and in aqueous chitosan (CS) solution acidified with different acids were investigated. The untreated CNT could not disperse in water of 1 ? pH < 13 whereas the acid-treated CNT could well disperse in this range except the pH ? 3. CS was soluble in water of pH ? 3. This paper presents an investigation on the dispersibility of CNT in CS in aqueous solutions and in composite films.
STUDY ON DISPERSIBILITY OF CARBON NANOTUBES IN CHITOSAN COMPOSITES
Yeong-Tarng Shieh , Hong-Mao Wu, May 2010
The dispersibility of carbon nanotubes (CNT) inwater of different pH and in aqueous chitosan (CS)solution acidified with different acids were investigated.The untreated CNT could not disperse in water of 1 ' pH< 13 whereas the acid-treated CNT could well disperse inthis range except the pH ' 3. CS was soluble in water ofpH ' 3. This paper presents an investigation on thedispersibility of CNT in CS in aqueous solutions and incomposite films.


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"Insert title of paper here in quotes,"
ANTEC 2016 - Indianapolis, Indiana, USA May 23-25, 2016. [On-line].
Society of Plastics Engineers
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