The world around us is full of industrial products made of relatively thin materials, including paper, textiles, plastic films, thin-film glass, nonwoven fabric, and metal foils. Although this variety shows that these materials are essential to our daily lives, they are also critical in furthering the development of high-tech industries that will eventually form the core of the global economy. Some examples from the IT, energy, and medical fields include optical films for flat panel displays, solid polymer membranes used in fuel cells, and artificial biological membranes for medical applications. During the manufacturing process, however, we call these materials webs.Web manufacturing technology relies on the converting technologies of coating, laminating, and printing, as well as on web handling technology (here we include unwinding, slitting, cutting, drying, and rewinding, etc.). Among these, coating and printing have established themselves as cutting-edge technologies, for which academics have shown great interest. In contrast, web handling technology has conventionally been refined through production plant experience; although the technology Publication: January 2015Format: B5 size 377pages (contents)Price: US$150 + (shipping costs extra) 11,000 yen ( including tax)Author: Hiromu Hashimoto, Dr. Eng.Publishing office: Converting Technical Institute www.ctiweb.co.jp/eng/4.10 Coefficient of Friction Control4.11 Air Entrainment Between the Web and Roller4.12 Fluid Viscosity Law4.13 Fluid Lubrication Principle4.14 Reynolds Equation4.15 Foil Bearing Theory4.16 Stribeck Curve4.17 Mixed Lubrication Model and Effective Coefficient of Friction4.18 Macro-slip Generation Conditions4.19 Macro-slip Prevention Methods4.20 Safe Web Transport DiagramChapter 5 Web Slippage5.1 Introduction5.2 Criteria for the Occurrence of Web-Roller Slip5.3 Theoretical Prediction Equation for Slip Initiation Velocity5.4 Slip Observation Test5.5 Pilot System Experimental VerificationChapter 6 Web Wrinkles6.1 Introduction6.2 Wrinkle Causes6.3 Wrinkle Generation Observation6.4 Theoretical Prediction model Formularization6.4.1 Theoretical Prediction Model for Margin Line (1)6.4.2 Margin Line (2) Theoretical Prediction Model6.5 Experimental Verification6.6 Preventing WrinklesChapter 7 Winding Mechanics7.1 Introduction7.2 Rewinding Drive Method CategorizationContentsitself has reached a fairly advanced level, its academic understanding is poor.At the strong behest of the industry, the author has spent the past 20 years working to theoretically understand the physical phenomena related to web handling, and predicting and preventing the problems that occur during manufacturing. Our research has been studied widely in Japan by industries that utilize web handling technology, and has been praised for the help that it has provided in eliminating defects and developing new products.On the other hand, we have also received strong interest from around the world in publishing our results in English given the desire to understand the strength of Japan's web handling technology. Given that the theoretical research into web handling began outside of Japan, we are elated to be able to publish an English version of our work as it will allow us to repay our debt to those who came before. At the same time, nothing would make us happier than to see this work contribute to the opening of new horizons for readers around the world involved in web handling technology.Chapter 1 Background to Web Handling1.1 Introduction1.2 Key Points of Web Handling Technology1.3 History of Web Handling Research1.4 Growth of Roll-to-Roll Printed ElectronicsChapter 2 Web Handling Fundamentals2.1 Introduction2.2 Mechanical Characteristics of the Web2.3 Web Surface Roughness Characteristics2.4 Friction Characteristics Between Solids2.5 Web-roller Interface Problems2.6 Web Bending Stress and Strain2.7 Web Tracking AbilityChapter 3 Web Deformation3.1 Introduction3.2 Relationship Between Web Material Structures and Elasticity3.3 Liquid Structures and Viscosity3.4 Viscoelastic Bodies and the Mechanical Model3.5 Web Bending3.6 Web Buckling3.7 Web CreasingChapter 4 Tribology in Web Handling4.1 Introduction4.2 Web Transport and Tribology4.3 Friction Force and Coefficient of Friction4.4 Amontons-Coulomb Friction Law4.5 Measuring Coefficient of Friction4.6 Euler’s Belt Equation4.7 Rigid Body Surface Roughness4.8 Rigid Body Contact and Friction4.9 Friction Mechanism7.3 Relationship Between Internal Wound Roll Stress and Roll Quality7.4 Internal Roll Young’s Modulus Anisotropy7.5 Hakiel’s Rewinding Theory7.6 Rewinding Equation Numerical Solution7.7 Hakiel Model Calculation Example7.8 Web Rewinding Theory Accounting for Air Entrainment7.8.1 When a Nip Roller is Not Used7.8.2 When Using a Nip Roller7.9 Modified Hakiel Model Experimental Verification7.9.1 Test Web Physical Properties7.9.2 Radial Stress Inside the Roll7.9.3 Rewinding Experiments and Internal Stress Measurement Results7.10 Taper Tension7.11 Optimization Theory for Rewinding Tesnion7.12 Viscoelastic Rewinding Theory7.13 Theory Considering Post-rewinding Temperature ChangesChapter 8 Tension Control8.1 Introduction8.2 Web Transport Systems and Tension Control8.3 Mechanical System Modeling for Tension Control8.4 Web Tension Control System8.5 Rewind Tension ControlChapter 9 Web Spreading9.1 Introduction9.2 Web Separating and Spreading Principle9.3 Web Separation Theoretical Prediction Model9.4 Experimental Verification9.4.1 Measuring Separation of the Slit Web9.4.2 Crease Prevention Function VerificationTheory and Application of Web Handling
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