Novel Injection Molding Foaming Approaches Using Gas Laden Pellets

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Novel Injection Molding Foaming Approaches Using Gas-laden Pellets

Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (874 download)

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Book Synopsis Novel Injection Molding Foaming Approaches Using Gas-laden Pellets by :

Download or read book Novel Injection Molding Foaming Approaches Using Gas-laden Pellets written by and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel method of producing injection molded parts with a foamed micro structure has been developed. It has been named supercritical fluid-laden pellet injection molding foaming technology (SIFT). Compared with conventional microcellular injection molding (MIM) tech-nologies, SIFT lowers the equipment costs significantly without sacrificing the production rate, making it a very promising candidate for mass producing foamed injection molded parts. In this study, both nitrogen (N2) and carbon dioxide (CO2) were verified by experiments to be suitable for this process as physical blowing agents. A novel foam injection molding approach using CO2+N2 co-blowing agents was proposed in this study. It has been discovered that when CO2 and N2 were introduced together as co-blowing agents at appropriate ratios, foamed parts with much finer morphology can be produced using this approach compared with using either blowing agent alone. It was first realized by combining the SIFT gas-laden pellets with the microcellular injection molding (MIM), such that N2 and CO2 can be introduced to the foaming process independently in two steps with precise dosage control. This approach has been implemented on several types of commodity polymers with equal success including low density polyethylene (LDPE), poly¬propylene (PP), high impact polystyrene (HIPS), and thermoplastic polyurethane (TPU) with two distinct mold geometries, and all lead to extraordinarily fine cell structures and/or high foam expansion ratio. To enhance the performance of the SIFT technology for future stringent industrial applications, several improvements were made. Methods to further enhance the cell nucleation rate were investigated. For the purpose of prolonging the gas-laden pellets shelf life, low molecular weight (LMW) additives were compounded with the polymer matrix. The experimental results indicate that LMW additives can effectively reduce the gas desorption rate from the pellets and lead to a longer shelf. It was found that at certain blend compositions, the ductility of the molded samples can be dramatically improved while achieving significant weight reduction. This novel ductility enhancing mechanism was investigated in this study. The analysis indicates that to achieve improved ductility, it is important to create a microcellular structure with a sub-micron scale immiscible secondary phase.

Foaming with Supercritical Fluids

Author : Ernesto Di Maio
Publisher : Elsevier
ISBN 13 : 0444637362
Total Pages : 486 pages
Book Rating : 4.4/5 (446 download)

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Book Synopsis Foaming with Supercritical Fluids by : Ernesto Di Maio

Download or read book Foaming with Supercritical Fluids written by Ernesto Di Maio and published by Elsevier. This book was released on 2021-11-06 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foaming with Supercritical Fluids, Volume Nine provides a comprehensive description of the use of supercritical fluids as blowing agents in polymer foaming. To this aim, the fundamental issues on which the proper design and control of this process are rooted are discussed in detail, with specific attention devoted to the theoretical and experimental aspects of sorption thermodynamics of a blowing agent within a polymer, the effect of the absorbed blowing agent on the thermal, interfacial and rheological properties of the expanding matter, and the phase separation of the gaseous phase, and of the related bubble nucleation and growth phenomena. Several foaming technologies based on the use of supercritical blowing agents are then described, addressing the main issues in the light of the underlying chemical-physical phenomena. Offers strong fundamentals on polymer properties important on foaming Outlines the use of supercritical fluids for foaming Covers theoretical points-of-view, including foam formation of the polymer/gas solution to the setting of the final foam Discusses the several processing technologies and applications

Polymeric Foams

Author : S.-T. Lee
Publisher : CRC Press
ISBN 13 : 1000588734
Total Pages : 365 pages
Book Rating : 4.0/5 (5 download)

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Book Synopsis Polymeric Foams by : S.-T. Lee

Download or read book Polymeric Foams written by S.-T. Lee and published by CRC Press. This book was released on 2022-05-19 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric Foams: Innovations in Technologies and Environmentally Friendly Materials offers the latest in technology and environmental innovations within the field of polymeric foams. It outlines how application-focused research in polymeric foam can continue to improve living quality and enhance social responsibility. This book: Addresses technological innovations including those in bead foams, foam injection molding, foams in tissue engineering, foams in insulation, and silicon rubber foam Discusses environmentally friendly innovations in PET foam, degradable and renewable foam, and physical blowing agents Describes principles as well as applications from internationally recognized foam experts This work is aimed at researchers and industry professionals across chemical, mechanical, materials, polymer engineering, and anyone else developing and applying these advanced polymeric materials.

Processing-Structure-Properties Relationships in Polymers

Author : Roberto Pantani
Publisher : MDPI
ISBN 13 : 3039218808
Total Pages : 400 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Processing-Structure-Properties Relationships in Polymers by : Roberto Pantani

Download or read book Processing-Structure-Properties Relationships in Polymers written by Roberto Pantani and published by MDPI. This book was released on 2019-12-05 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection of research and review papers is aimed at depicting the state of the art on the possible correlations between processing variables, obtained structure and special properties which this structure induces on the plastic part. The extraordinary capacity of plastics to modify their properties according to a particular structure is evidenced for several transformation processes and for many applications. The final common goal is to take profit of this peculiar capacity of plastics by inducing, through a suitable processing, a specific spatial organization.

Gas Assist Injection Molding

Author : Amitesh Agrahari
Publisher : Independently Published
ISBN 13 :
Total Pages : 194 pages
Book Rating : 4.6/5 (787 download)

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Book Synopsis Gas Assist Injection Molding by : Amitesh Agrahari

Download or read book Gas Assist Injection Molding written by Amitesh Agrahari and published by Independently Published. This book was released on 2015-09 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Complete Gas Assist Injection Molding Book with Case StudyThis book covers - Why Plastics demand are super high ? - How Injection Molding Process are manufacturing leader ?- Literature - Plastics History - Plastic Technology- Polymer Properties & Behavior- Product Design & Mold Design- Gas Assist Injection Molding Machines & Equipment- Case Study - Process Study & Analysis - Conclusion- Future Scope

Gas-assist Injection Molding

Author : Jack Avery
Publisher : Hanser Gardner Publications
ISBN 13 : 9781569902981
Total Pages : 203 pages
Book Rating : 4.9/5 (29 download)

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Book Synopsis Gas-assist Injection Molding by : Jack Avery

Download or read book Gas-assist Injection Molding written by Jack Avery and published by Hanser Gardner Publications. This book was released on 2001 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended as a description of modern molding simulation technology for users and researchers. The book tries to be self contained and provides the major technologies used and assumptions made by commercial codes so as to provide a guide to users of limitations and a basis for further development. In the latter part of the book some ideas and approaches for improving simulation technology are provided. These are specifically aimed at fiber filled and semi-crystalline materials.

A Systems Approach to Manufacturing Variable Density Polymer Composites Using Gas-assisted Injection Molding

Author : David Girard Haverty
Publisher :
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.:/5 (328 download)

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Book Synopsis A Systems Approach to Manufacturing Variable Density Polymer Composites Using Gas-assisted Injection Molding by : David Girard Haverty

Download or read book A Systems Approach to Manufacturing Variable Density Polymer Composites Using Gas-assisted Injection Molding written by David Girard Haverty and published by . This book was released on 1994 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Handbook of Foaming and Blowing Agents

Author : George Wypych
Publisher : Elsevier
ISBN 13 : 1774670011
Total Pages : 309 pages
Book Rating : 4.7/5 (746 download)

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Book Synopsis Handbook of Foaming and Blowing Agents by : George Wypych

Download or read book Handbook of Foaming and Blowing Agents written by George Wypych and published by Elsevier. This book was released on 2022-03-12 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Foaming and Blowing Agents, Second Edition includes the most current information on foaming technology, guiding users on the proper selection of formulation, which is highly dependent on the mechanisms of action of blowing agents and foaming agents, as well as dispersion and solubility. The book includes properties of 23 groups of blowing agents and the typical range of technical performance for each group, including general properties, physical-chemical properties, health and safety, environmental impact, and applications in different products and polymers. All information is illustrated by chemical reactions and diagrams. Chapters in the book look at foaming mechanisms with the use of solid blowing agents, which are decomposed to the gaseous products by application of heat, production of gaseous products by chemical reaction, and foaming by gases and evaporating liquids. Introduces the fundamental mechanisms of action of blowing agents and foaming Includes best practice guidance to help engineers and technicians improve the efficiency of their existing foaming processes Enables practitioners to select blowing agents and foaming methods more effectively, thus reducing the risk of poor specification Introduces useful analytical techniques for foaming Discusses the environmental impact of foaming processes

Principles of Polymer Processing

Author : Zehev Tadmor
Publisher : John Wiley & Sons
ISBN 13 : 0470355921
Total Pages : 1004 pages
Book Rating : 4.4/5 (73 download)

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Book Synopsis Principles of Polymer Processing by : Zehev Tadmor

Download or read book Principles of Polymer Processing written by Zehev Tadmor and published by John Wiley & Sons. This book was released on 2013-12-02 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thoroughly revised edition of the classic text on polymer processing The Second Edition brings the classic text on polymer processing thoroughly up to date with the latest fundamental developments in polymer processing, while retaining the critically acclaimed approach of the First Edition. Readers are provided with the complete panorama of polymer processing, starting with fundamental concepts through the latest current industry practices and future directions. All the chapters have been revised and updated, and four new chapters have been added to introduce the latest developments. Readers familiar with the First Edition will discover a host of new material, including: * Blend and alloy microstructuring * Twin screw-based melting and chaotic mixing mechanisms * Reactive processing * Devolatilization--theory, mechanisms, and industrial practice * Compounding--theory and industrial practice * The increasingly important role of computational fluid mechanics * A systematic approach to machine configuration design The Second Edition expands on the unique approach that distinguishes it from comparative texts. Rather than focus on specific processing methods, the authors assert that polymers have a similar experience in any processing machine and that these experiences can be described by a set of elementary processing steps that prepare the polymer for any of the shaping methods. On the other hand, the authors do emphasize the unique features of particular polymer processing methods and machines, including the particular elementary step and shaping mechanisms and geometrical solutions. Replete with problem sets and a solutions manual for instructors, this textbook is recommended for undergraduate and graduate students in chemical engineering and polymer and materials engineering and science. It will also prove invaluable for industry professionals as a fundamental polymer processing analysis and synthesis reference.

Polymeric Foams

Author : Shau-Tarng Lee
Publisher : CRC Press
ISBN 13 : 142000462X
Total Pages : 240 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Polymeric Foams by : Shau-Tarng Lee

Download or read book Polymeric Foams written by Shau-Tarng Lee and published by CRC Press. This book was released on 2006-08-21 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers are among the major hallmarks of 20th-century science, and the explosive outgrowth and tremendous importance of polymeric foams is a testament to their amazing versatility and unique properties. With applications from automotive to acoustic and medical, polymeric foams pervade all areas of our lives. If this growth is to continue into the

Introduction to Permanent Plug and Abandonment of Wells

Author : Mahmoud Khalifeh
Publisher : Springer Nature
ISBN 13 : 3030399702
Total Pages : 285 pages
Book Rating : 4.0/5 (33 download)

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Book Synopsis Introduction to Permanent Plug and Abandonment of Wells by : Mahmoud Khalifeh

Download or read book Introduction to Permanent Plug and Abandonment of Wells written by Mahmoud Khalifeh and published by Springer Nature. This book was released on 2020-01-27 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book offers a timely guide to challenges and current practices to permanently plug and abandon hydrocarbon wells. With a focus on offshore North Sea, it analyzes the process of plug and abandonment of hydrocarbon wells through the establishment of permanent well barriers. It provides the reader with extensive knowledge on the type of barriers, their functioning and verification. It then discusses plug and abandonment methodologies, analyzing different types of permanent plugging materials. Last, it describes some tests for verifying the integrity and functionality of installed permanent barriers. The book offers a comprehensive reference guide to well plugging and abandonment (P&A) and well integrity testing. The book also presents new technologies that have been proposed to be used in plugging and abandoning of wells, which might be game-changing technologies, but they are still in laboratory or testing level. Given its scope, it addresses students and researchers in both academia and industry. It also provides information for engineers who work in petroleum industry and should be familiarized with P&A of hydrocarbon wells to reduce the time of P&A by considering it during well planning and construction.

Food Packaging Technology

Author : Richard Coles
Publisher : CRC Press
ISBN 13 : 9780849397882
Total Pages : 370 pages
Book Rating : 4.3/5 (978 download)

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Book Synopsis Food Packaging Technology by : Richard Coles

Download or read book Food Packaging Technology written by Richard Coles and published by CRC Press. This book was released on 2003-08-15 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The protection and preservation of a product, the launch of new products or re-launch of existing products, perception of added-value to products or services, and cost reduction in the supply chain are all objectives of food packaging. Taking into consideration the requirements specific to different products, how can one package successfully meet all of these goals? Food Packaging Technology provides a contemporary overview of food processing and packaging technologies. Covering the wide range of issues you face when developing innovative food packaging, the book includes: Food packaging strategy, design, and development Food biodeterioation and methods of preservation Packaged product quality and shelf life Logistical packaging for food marketing systems Packaging materials and processes The battle rages over which type of container should be used for which application. It is therefore necessary to consider which materials, or combination of materials and processes will best serve the market and enhance brand value. Food Packaging Technology gives you the tools to determine which form of packaging will meet your business goals without compromising the safety of your product.

Polymeric Foams

Author : Shau-Tarng Lee
Publisher : CRC Press
ISBN 13 : 1135499748
Total Pages : 476 pages
Book Rating : 4.1/5 (354 download)

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Book Synopsis Polymeric Foams by : Shau-Tarng Lee

Download or read book Polymeric Foams written by Shau-Tarng Lee and published by CRC Press. This book was released on 2004-05-27 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the inaugural volume a series entitled Polymeric Foams: Technology and Applications. Generally, thermoplastic and thermoset foams have been treated as two separate practices in industry. Polymeric Foams: Mechanisms and Materials presents the basics of foaming in general build a strong foundation to those working in both thermoplastic a

Foam Extrusion

Author : S.-T. Lee
Publisher : CRC Press
ISBN 13 : 1439898596
Total Pages : 636 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Foam Extrusion by : S.-T. Lee

Download or read book Foam Extrusion written by S.-T. Lee and published by CRC Press. This book was released on 2014-04-07 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining the science of foam with the engineering of extrusion processes, Foam Extrusion: Principles and Practice delivers a detailed discussion of the theory, design, processing, and application of degradable foam extraction. In one comprehensive volume, the editors present the collective expertise of leading academic, research, and industry specialists while laying the scientific foundation in such a manner that the microscopic transition from a nucleus to a void (nucleation) and macroscopic movement from a void to an object (formation) are plausibly addressed. To keep pace with significant improvements in foam extrusion technology, this Second Edition: Includes new chapters on the latest developments in processing/thermal management, rheology/melt strength, and biodegradable and sustainable foams Features extensive updates to chapters on extrusion equipment, blowing agents, polyethylene terephthalate (PET) foam, and microcellular innovation Contains new coverage of cutting-edge foaming mechanisms and technology, as well as new case studies, examples, and figures Capturing the interesting evolution of the field, Foam Extrusion: Principles and Practice, Second Edition provides scientists, engineers, and product development professionals with a modern, holistic view of foam extrusion to enhance research and development and aid in the selection of the optimal screw, die design, and foaming system.

Hot Embossing

Author : Matthias Worgull
Publisher : William Andrew
ISBN 13 : 0815519745
Total Pages : 368 pages
Book Rating : 4.8/5 (155 download)

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Book Synopsis Hot Embossing by : Matthias Worgull

Download or read book Hot Embossing written by Matthias Worgull and published by William Andrew. This book was released on 2009-09-28 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an overview of replication technology for micro- and nanostructures, focusing on the techniques and technology of hot embossing, a scaleable and multi-purpose technology for the manufacture of devices such as BioMEMS and microfluidic devices which are expected to revolutionize a wide range of medical and industrial processes over the coming decade.The hot embossing process for replicating microstructures was developed by the Forschungszentrum Karlsruhe (Karlsruhe Institute of Technology) where the author is head of the Nanoreplication Group. Worgull fills a gap in existing information by fully detailing the technology and techniques of hot embossing. He also covers nanoimprinting, a process related to hot embossing, with examples of actual research topics and new applications in nanoreplication. A practical and theoretical guide to selecting the materials, machinery and processes involved in microreplication using hot embossing techniques Compares different replication processes such as: micro injection molding, micro thermoforming, micro hot embossing, and nanoimprinting Details commercially available hot embossing machinery and components like tools and mold inserts

Fundamentals of Rocket Propulsion

Author : DP Mishra
Publisher : CRC Press
ISBN 13 : 1351708414
Total Pages : 364 pages
Book Rating : 4.3/5 (517 download)

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Book Synopsis Fundamentals of Rocket Propulsion by : DP Mishra

Download or read book Fundamentals of Rocket Propulsion written by DP Mishra and published by CRC Press. This book was released on 2017-07-20 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book follows a unified approach to present the basic principles of rocket propulsion in concise and lucid form. This textbook comprises of ten chapters ranging from brief introduction and elements of rocket propulsion, aerothermodynamics to solid, liquid and hybrid propellant rocket engines with chapter on electrical propulsion. Worked out examples are also provided at the end of chapter for understanding uncertainty analysis. This book is designed and developed as an introductory text on the fundamental aspects of rocket propulsion for both undergraduate and graduate students. It is also aimed towards practicing engineers in the field of space engineering. This comprehensive guide also provides adequate problems for audience to understand intricate aspects of rocket propulsion enabling them to design and develop rocket engines for peaceful purposes.

Bone Tissue Engineering

Author : Jeffrey O. Hollinger
Publisher : CRC Press
ISBN 13 : 1135501912
Total Pages : 500 pages
Book Rating : 4.1/5 (355 download)

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Book Synopsis Bone Tissue Engineering by : Jeffrey O. Hollinger

Download or read book Bone Tissue Engineering written by Jeffrey O. Hollinger and published by CRC Press. This book was released on 2004-10-14 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on bone biology, Bone Tissue Engineering integrates basic sciences with tissue engineering. It includes contributions from world-renowned researchers and clinicians who discuss key topics such as different models and approaches to bone tissue engineering, as well as exciting clinical applications for patients. Divided into four sections, t