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Web Handling and Converting Track
Attend one, two, three or all four days of this course focused on web handling, converting and winding.
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Web Handling and Converting
Day I and II, Timothy Walker, TJWalker+Associates Inc.
Day 3 and IV, Dr. David R. Roisum, Finishing Technologies, Inc.
Course Overview
This four-day course is a comprehensive guide to web machinery, mechanics and processes. Both instructors are internationally known experts in web handling and converting technology. Monday’s and Tuesday’s sessions provide a complete overview of web handling fundamentals critical to all web applications, whether coating, laminating or converting. The final two days build on this foundation, addressing specific web applications. Wednesday’s session reviews web modification processes, while Thursday’s topics include winding machinery, wound roll defects and productivity.
Session Topics
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Day I, August 6
- Web Handling
- Web Properties and Behavior
- Web Types
- Defects in Web Handling
- Rollers & Traction Fundamentals
- Nipped Roller Systems
- Longitudinal Dynamics (Part 1)
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Day 2, August 7
- Web Handling
- Longitudinal Dynamics (Part 2)
- Lateral Dynamics
- Guiding Specifications
- Air Floatation/Air Turns
- Wrinkling
- Web Line Safety
- Web Measurement and Marking
- Web Line Resources
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Day 3, August 8
- Web Converting
- Slitting and Cutting
- Trim Removal
- Converting Operations Overview
- (Coating, Printing, Laminating)
- Web Temperature Control
- Moisture/Temperature Effects
- Web Cleaning
- Static Electricity
- Safety
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Day 4, August 9
- Web Converting
- Winding Machines
- Productivity
- Time Cycle Analysis
- Automation
- Human Engineering
- Stresses in a Wound Roll
- Roll Quality Measurement
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Back to Schedule
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Web Coating and Laminating Track
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Fundamentals of Adhesion
Dr. Alphonsus Pocius, 3M Interface Materials Technology Center
Course Overview
The best way to solve a problem is to know what is going on behind it.
This course is meant to provide the student an overview of the
fundamentals of adhesion science. The course will cover the basics of
surface science as it relates to adhesion science and will also review
the viscoelastic properties of polymers. These two topics will be
combined to provide a fundamental picture of adhesion. The course will
cover practical examples of the applications of these concepts (such as
product applications and surface preparation) and will also give an
overview of pressure sensitive and hot melt adhesives.
Session Topics
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Lecture 1 Introduction
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Basic definitions
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Applications of adhesion in industry
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Advantages and disadvantages of adhesive bonding
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Literature
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Lecture 2 Surface Science as is Relevant to Adhesion Science
- Basic
concepts and intermolecular forces
- Definition of surface energy and
surface tension
- Interfacial energy Work of adhesion
- Contact angles
- Contact mechanics
- Surface analytical methods
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Lecture 3 Polymer Properties and Dynamic Mechanical Measurements
- Polymer conformations and types
- Important molecular weights
- Glass transition
temperature
- Loss and storage moduli
- Dynamic mechanical spectra and
master curves
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Lecture 4 Rationalization of Adhesion Phenomena
- Electrostatic theory
- Wettability-adsorption theory
- Acid-base theory
- Covalent bonding at interfaces
- Diffusion theory
- Relating practical and fundamental adhesion
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Lecture 5 Surface Preparations
- Corona discharge treatment
- Plasma treatment
- Chemical methods including priming
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Lecture 6 Pressure sensitive adhesives and other rubber-based adhesives
- Basic chemistry and physical properties
- Tack, its measurement and
meaning
- Pressure sensitive adhesion and rheological properties
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Lecture 7 Hot Melt adhesives
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Basic chemistry and physical properties
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Coating Defects: Characterization, Causes, Cures, And Prevention
Dr. Ed Cohen, Edward D Cohen Consulting
Course Overview
Defects are an ongoing concern to all producers of coated films and low defect losses are essential to be competitive and for economic survival, In addition, quality demands are continually for most coated products. Thus, development and implementation of technology and methodology to eliminate and prevent defects is a necessity for producers of coated web products.
This course presents the technologies needed to eliminate and/or prevent defects in the web coating process. The description, causes, and cures of defects, typically found in the coating process, will be discussed.
Current web coating processes are technically complex and have several different elements, any of which can introduce defects in the final product. Virtually all the process stages, from mixing the coating solutions to shipping the product to the customer, can introduce defects. Every raw material can introduce defects. As a result several technologies are needed to characterize the defects, determine the mechanisms that cause them, and eliminate them prevent their reoccurrence.
Unfortunately, defects are often detected after the process step where they are caused. A mixing defect may not be seen until the product is coated and dried. A substrate defect may not be detected until the final product is wound or slit into narrow widths to meet customer needs. Topics to be covered in this course are:
- Defect characterization technology - The analytical techniques, to characterize defects will be discussed.
- Defect nomenclature - The importance of correctly identifying and naming the defect will be presented..
- Role of the substrate - The importance of substrate properties on the final coated product and its defect level will be discussed.
- Process measurement technology - The instrumentation and measurement tools needed to understand and control process will be presented. Discussion will include calibration techniques.
- Process Control Technology - The various statistical processes needed to control the process as well as the training needs will be presented.
- Process hardware technology - The role of various process operations, such as filtration, mixing, deaeration, static control on-line coating weight measurement, and on-line inspection systems will be discussed
- Specific Defects causes and cures - The causes and cures for several classes of defect will be discussed with examples presented.
- Elements of a defect prevention program
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