Author: Bertram Hubert Gregory
Publisher:
ISBN: 9781906479121
Category : Technology & Engineering
Languages : en
Pages : 310
Get Book Here
Book Description
A practical and detailed evaluation of polyethylene film extrusion processes for a diverse range of products. Polyethylene film is pervasive in many aspects of everyday life in applications including consumer and bulk packaging, household items, construction, horticulture, medical and hygiene products and many more. Established now for many years the technology of polyethylene film extrusion continues to develop as newer applications often demand superior performance and more established uses strive for reduced materials consumption by downgauging. Film performance is influenced by the nature of the polymer, the manufacturing process and a wide variety of additives, as well as the option of creating ever more complex multi-layered structures by coextrusion, laminating, coating and even intentional blocking. Applications may demand stretch or shrink behaviour, mechanical strength, heat sealability and high or low permeability. This book has been written for a wide readership of technologists, engineers, marketers and students engaged in the development and production of polyolefin films for all applications. The aim is to assist in optimizing product performance, evaluating the most cost effective solutions and providing useful information on the key polymers and films commercially available. Key features of screw and die designs and film treatments, blending and formulations are evaluated. Clear diagrams are provided together with copious data.
Author: B. H Gregory
Publisher: Trafford Publishing
ISBN: 1426918100
Category : Reference
Languages : en
Pages : 234
Get Book Here
Book Description
A revised version of this book is now available.The polyethylene industry has been in the midst of major restructuring and rationalization. This has lead to joint ventures and alliances to combine technologies and exploit opportunities to maximize improvements in process productivity, catalyst innovations, and enhancements in extrusion technology and converting. This comprehensive study of the polyethylene film extrusion process describes this technology in detail. In depth descriptions of the manufacturing processes for polyethylene homopolymers and copolymers, including metallocenes, are reviewed. All aspects of machine design with particular emphasis on screws and dies including coextrusion are discussed comprehensively. With computer modeling, the interactions between equipment and polymer are quantified. All aspects of equipment design and polymer features that control melt fracture, interfacial instabilities, gauge control, output and temperature, and cooling of blown and cast film processes are presented quantitatively. This methodology will highlight solutions in troubleshooting for optimum design and operation and the best available polymer and formulation choices. All polyethylene film applications in packaging, agriculture, lamination, and construction, consumer, industrial, and health care are reviewed and discussed in depth.
Author: James F. Macnamara, Jr.
Publisher:
ISBN: 9781595102980
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Author: Harold F. Giles Jr
Publisher: William Andrew
ISBN: 1437734820
Category : Technology & Engineering
Languages : en
Pages : 638
Get Book Here
Book Description
The second edition of Extrusion is designed to aid operators, engineers, and managers in extrusion processing in quickly answering practical day-to-day questions. The first part of the book provides the fundamental principles, for operators and engineers, of polymeric materials extrusion processing in single and twin screw extruders. The next section covers advanced topics including troubleshooting, auxiliary equipment, and coextrusion for operators, engineers, and managers. The final part provides applications case studies in key areas for engineers such as compounding, blown film, extrusion blow molding, coating, foam, and reprocessing. This practical guide to extrusion brings together both equipment and materials processing aspects. It covers basic and advanced topics, for reference and training, in thermoplastics processing in the extruder. Detailed reference data are provided on such important operating conditions as temperatures, start-up procedures, shear rates, pressure drops, and safety. - A practical guide to the selection, design and optimization of extrusion processes and equipment - Designed to improve production efficiency and product quality - Focuses on practical fault analysis and troubleshooting techniques
Author: B. H. Gregory
Publisher: Trafford Publishing
ISBN: 142699057X
Category : Reference
Languages : en
Pages : 231
Get Book Here
Book Description
A revised version of this book is now available. The polyethylene industry has been in the midst of major restructuring and rationalization. This has lead to joint ventures and alliances to combine technologies and exploit opportunities to maximize improvements in process productivity, catalyst innovations, and enhancements in extrusion technology and converting. This comprehensive study of the polyethylene film extrusion process describes this technology in detail. In depth descriptions of the manufacturing processes for polyethylene homopolymers and copolymers, including metallocenes, are reviewed. All aspects of machine design with particular emphasis on screws and dies including coextrusion are discussed comprehensively. With computer modeling, the interactions between equipment and polymer are quantified. All aspects of equipment design and polymer features that control melt fracture, interfacial instabilities, gauge control, output and temperature, and cooling of blown and cast film processes are presented quantitatively. This methodology will highlight solutions in troubleshooting for optimum design and operation and the best available polymer and formulation choices. All polyethylene film applications in packaging, agriculture, lamination, and construction, consumer, industrial, and health care are reviewed and discussed in depth.
Author: Thomas I. Butler
Publisher: Tappi
ISBN: 9781595100757
Category : Plastic films
Languages : en
Pages : 616
Get Book Here
Book Description
Author: Mark A. Spalding
Publisher: John Wiley & Sons
ISBN: 1119159776
Category : Technology & Engineering
Languages : en
Pages : 1671
Get Book Here
Book Description
This handbook provides an exhaustive description of polyethylene. The 50+ chapters are written by some of the most experienced and prominent authors in the field, providing a truly unique view of polyethylene. The book starts with a historical discussion on how low density polyethylene was discovered and how it provided unique opportunities in the early days. New catalysts are presented and show how they created an expansion in available products including linear low density polyethylene, high density polyethylene, copolymers, and polyethylene produced from metallocene catalysts. With these different catalysts systems a wide range of structures are possible with an equally wide range of physical properties. Numerous types of additives are presented that include additives for the protection of the resin from the environment and processing, fillers, processing aids, anti-fogging agents, pigments, and flame retardants. Common processing methods including extrusion, blown film, cast film, injection molding, and thermoforming are presented along with some of the more specialized processing techniques such as rotational molding, fiber processing, pipe extrusion, reactive extrusion, wire and cable, and foaming processes. The business of polyethylene including markets, world capacity, and future prospects are detailed. This handbook provides the most current and complete technology assessments and business practices for polyethylene resins.
Author: John R. Wagner, Jr.
Publisher: John Wiley & Sons
ISBN: 1118511204
Category : Technology & Engineering
Languages : en
Pages : 472
Get Book Here
Book Description
This handbook provides a framework for understanding how to characterize plastic manufacturing processes for use in troubleshooting problems. The 21 chapters are authored by well-known and experienced engineers who have specialized knowledge about the processes covered in this practical guide. From the Preface: “In every chapter, the process is described and the most common problems are discussed along with the root causes and potential technical solutions. Numerous case studies are provided that illustrate the troubleshooting process. Mark A. Spalding, The Dow Chemical Company
Author:
Publisher:
ISBN:
Category : Plastics
Languages : en
Pages : 766
Get Book Here
Book Description
Author: Thomas Dunn
Publisher: William Andrew
ISBN: 0323265057
Category : Technology & Engineering
Languages : en
Pages : 305
Get Book Here
Book Description
Efficiently and profitably delivering quality flexible packaging to the marketplace requires designing and manufacturing products that are both "fit-to-use" and "fit-to-make". The engineering function in a flexible packaging enterprise must attend to these dual design challenges. Flexible Packaging discusses the basic processes used to manufacture flexible packaging products, including rotogravure printing, flexographic printing, adhesive lamination, extrusion lamination/coating; and finishing/slitting. These processes are then related to the machines used to practice them, emphasising the basics of machines’ control systems , and options to minimize wasted time and materials between production jobs. Raw materials are also considered, including the three basic forms: Rollstock (paper, foil, plastic films); Resin; and Wets (inks, varnishes, primers). Guidance is provided on both material selection, and on adding value through enhancement or modification of the materials’ physical features. A ‘measures’ section covers both primary material features – such as tensile, elongation, modulus and elastic and plastic regions – and secondary quality characteristics such as seal and bond strengths, coefficient of friction, oxygen barrier and moisture vapour barrier. Helps engineers improve existing raw material selection and manufacturing processes for manufacturing functional flexible packaging materials. Covers all aspects of delivering high value packaging to the customer – from the raw materials, to the methods of processing them, the machines used to do it, and the measures required to gauge the characteristics of the product. Helps engineers to minimize waste and unproductive time in production.
