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
Towards Sustainability
Robert Flores, February 2018
Sustainability in Packaging
Energy Recovery Using the EnergyBag™
Jill Martin, February 2018
Sustainability in Packaging
The Evolving Role of Packaging in the Circular Economy
Jennifer Ronk, February 2018
Sustainability in Packaging
Sustainable Flexible Packaging--A Resin Supplier's View
Lawrence Effer, February 2018
Sustainability in Packaging
Unilever’s Packaging Journey
Julie Zaniewski, February 2018
Sustainability in Packaging
Extractives Analysis of Recycled Polyolefins for Food Contact Applications-
Autumn Rudlong, February 2018
Sustainability in Packaging
Chemical Foaming Agents: Foaming Polyolefins in Injection Molding and Extrusion
Peter Schroeck, February 2018
Foams and Post-Reactor Technologies
Cell Nucleation and Growth Mechanisms in Foam Injection Molding of Polypropylene
Chul Park, February 2018
Foams and Post-Reactor Technologies
Changing Your Polyolefin Extrusion Line into a Physical Foam Extrusion Line--Key Considerations
Andy Caufmann, February 2018
Foams and Post-Reactor Technologies
Effect of the MFI of PP on the Nanofibrillation and Foaming Behavior of PP/PET System
Chul Park, February 2018
Foams and Post-Reactor Technologies
Flexural Mechanical Properties Properties of PP-Nanofibrillated-PET Composites and Foams
Lun Howe, February 2018
Foams and Post-Reactor Technologies
Opportunities to Close the Loop with Non-Mechanical Recycling
Emily Tipaldo, February 2018
Sustainability Metrics and Characterization
In-Situ Melt Catalysis--The Ultimate Answer to Compabilizing Addition and Condensation Polymers
Salvatore Monte, February 2018
Sustainability Metrics and Characterization
Development of Rice Husk/Polefin Composites
Thi Thu Loan Doan, February 2018
Recent Advances in Additives - Paper: This article presents some characteristics of the composites based on rice husk filler and polyolefin (Polyethylene and polypropylene). The influences of rice husk content and compatibilizers on mechanical properties of the composites were investigated. An increase in rice husk content led to increased modulus and decreased tensile, bending and impact strengths of the composites in the case without modification. However, the presence of the compatibilizers based on maleic anhydride grafted polyolefin caused an increase in tensile, bending and impact strengths of the composites. Furthermore, some additives such as processing stabilizer, UV stabilizer and fungal resistance agents were also added in order to improve some properties of rice husk/polyolefin composites during processing and using. The experimental results indicated that the addition of the additives improved significantly some properties of the composites.
Development of Rice Husk/Polefin Composites
Thi Thu Loan Doan, February 2018
Recent Advances in Additives - Presentation: This article presents some characteristics of the composites based on rice husk filler and polyolefin (Polyethylene and polypropylene). The influences of rice husk content and compatibilizers on mechanical properties of the composites were investigated. An increase in rice husk content led to increased modulus and decreased tensile, bending and impact strengths of the composites in the case without modification. However, the presence of the compatibilizers based on maleic anhydride grafted polyolefin caused an increase in tensile, bending and impact strengths of the composites. Furthermore, some additives such as processing stabilizer, UV stabilizer and fungal resistance agents were also added in order to improve some properties of rice husk/polyolefin composites during processing and using. The experimental results indicated that the addition of the additives improved significantly some properties of the composites.
Morphology and Stress Whitening of PP Impact Copolymers
Marc Herklots, February 2018
Recent Advances in Characterization: During the process of manufacturing (injection molding, blow molding etc.) or later handling of polypropylene impact copolymers, white marks may appear when the material is subjected to stress. A significant effect of the so-called stress w hitening or blushing is an aesthetic issue because the white marks can be easily identified. The stress whitening phenomenon is attributed to voids created within the deforming polymer. In this work, several ICP's with varying rubber composition and phase viscosity ratios were examined using digital imaging and microscopy techniques in order to establish the relation between the composition, the resulting morphology and to relate this to stress whitening resistance. It was shown that stress whitening could be solely attributed to rubber cavitation. The smaller the rubber particle size, the better the resistance to stress whitening. The required morphology also implies that these materials will suffer from a lower impact performance compared to conventional impact copolymers.
Fundamentals of Twin-Screw Compounding: Kneading Block Performance Characteristics
Paul Andersen, February 2018
Advances in Compounding and Extrusion - Paper: The co-rotating fully intermeshing twin-screw extruder has evolved significantly in the 60 years since it was commercialized in 1957. While this equipment might be considered a "mature" technology, it has not experienced a decline in new developments as might be expected, but a rather significant number of advancements have been introduced during the intervening years. Even today the technology continues to evolve. For example in the last 20 years several significant developments have been introduced. These include a) the implementation of high torque (power) designs, b) the use of increased screw rpm in conjunction with high torque for improved operating flexibility and productivity, and c) a breakthrough technology for feeding difficult to handle low bulk density materials. However, one area of twin-screw technology that has not evolved as much is screw elements geometry. Conveying elements and kne ading blocks have remained essentially the same since the original Erdmenger design patents were filed in the late 1940's and early 1950's. In spite of their longevity in the market, there are still unknown qualitative as well as quantitative operational characteristics. This paper will focus on kneading blocks, specifically looking at some significant aspects related to performance. These include pressure generation as a function of 1) absolute pressure, 2) disc profile (2-lobe vs 3-lobe) , 3) disc width, 4) disc stagger angle, and 5) material viscosity.
Fundamentals of Twin-Screw Compounding: Kneading Block Performance Characteristics
Paul Andersen, February 2018
Advances in Compounding and Extrusion - Presentation: The co-rotating fully intermeshing twin-screw extruder has evolved significantly in the 60 years since it was commercialized in 1957. While this equipment might be considered a "mature" technology, it has not experienced a decline in new developments as might be expected, but a rather significant number of advancements have been introduced during the intervening years. Even today the technology continues to evolve. For example in the last 20 years several significant developments have been introduced. These include a) the implementation of high torque (power) designs, b) the use of increased screw rpm in conjunction with high torque for improved operating flexibility and productivity, and c) a breakthrough technology for feeding difficult to handle low bulk density materials. However, one area of twin-screw technology that has not evolved as much is screw elements geometry. Conveying elements and kne ading blocks have remained essentially the same since the original Erdmenger design patents were filed in the late 1940's and early 1950's. In spite of their longevity in the market, there are still unknown qualitative as well as quantitative operational characteristics. This paper will focus on kneading blocks, specifically looking at some significant aspects related to performance. These include pressure generation as a function of 1) absolute pressure, 2) disc profile (2-lobe vs 3-lobe) , 3) disc width, 4) disc stagger angle, and 5) material viscosity.
Reciprocating Single Screw Compounding Technology
Brad Rogers, February 2018
Advances in Compounding and Extrusion - Paper: Single-reciprocating screw compounding (kneader) technology was developed and introduced more than 70 years ago. Surprisingly this technology is not largely considered when companies evaluate their compounding needs. With an ever-increasing demand for higher shear sensitive materials and additives, higher load filling, and better distributive and dispersive mixing requirements, this paper revisits this technology that is becoming more and more relevant in today's marketplace. The paper also discusses many of the noteworthy advancements that have been made with this equipment over the years.


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Brown, H. L. and Jones, D. H. 2016, May.
"Insert title of paper here in quotes,"
ANTEC 2016 - Indianapolis, Indiana, USA May 23-25, 2016. [On-line].
Society of Plastics Engineers
Available: www.4spe.org.

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