Sunday Oct. 9th, 8:30am - 12:00pm
Whether you make, convert or use webs; you must know web handling. Find out how to:
Coextrusion to Improve Barrier Properties
Part 1 - Coextrusion to Improve Barrier Properties
Part 2 - Troubleshooting the Coextrusion Properties
Part 1 - Coextrusion is an integral part of the extrusion process, and is used in many industries and product lines. This course will review the following areas as they pertain to barrier packaging.
•Food, atmospheric and barrier requirements
•Barrier resins and films – properties, profiles, morphology & chemistry
•Widely used barrier resins and films
•Estimating coextruded films barrier properties from resin properties
•Confirming barrier levels in thin films
–Shelf life analysis
Part 2 - Coextrusion presents it's own particular set of challenges. This class will review the review coextrusion practices and techniques, and in particular the following:
•Combining incompatible polymers
•Use of adhesive layers
•Adds complexity to product designs by increasing number of layers
•Viscosity matching of different layers
Web Coating Defect Reduction Techniques
Edward D Cohen
The web coating process is capable of creating a wide variety of defect, all of which must be eliminated to insure the quality and coat efficiency of the coated product. There are many potential causes for these defect. Therefore; a structured defect reduction procedure is required to effectively and rapidly reduce these defects. The procedure is effective from pilot coatings to the manufacturing procedure.
This course will discuss the major techniques that comprise an effective defect reduction program:
• The importance of correctly naming the defect
• Analytical techniques to characterize defect
• Basic defect causes
• Defect information sources
• Identifying potential causes of the current defect
• Eliminating the defect
• Data storage
Sunday Oct. 9th, 1:00pm - 4:30pm
Web Slitting Technology
Common Slitting Methods
Presented are an overview of web material characteristics and the dynamic challenges to consider when selecting a slitting method for your operation. Included are some less common but practical slitting methods for material specific web separation applications.
Featured are Razor, Crush and Shear Slitting web fracturing methods juxtaposed with magnified photographs of various web materials during Lab controlled slitting. Briefly discussed are the friction and force effects of both Crush and Shear Slitting and an overview of common knife shapes and their advantages.
Discussed are web Tensile Stress Fracturing and where razor slitting is best used. Presented are web deformation comparisons of shear and razor slitting effects on various polymer web materials with microscopic fotos.
Included is information on web deformation, blade wear and how High/Flared edges (a common nightmare for thin films processes) occur on finished roll goods.
In-air and wrapped web paths are covered along with blade oscillation. Additional discussion includes razor blade materials and common razor blade holders. A summary of razor slitting Benefits and Limitations finishes this segment.
Slitting Adhesive Webs
This presentation will compare the differences between the World of Adhesive Science and the World of Adhesive Web Manufacturing that some of you must work within. Presented are some of the pitfalls of both Pressure Sensitive Adhesive slitting and Heat Sensitive Adhesive Slitting.
Techniques to better deal with adhesive web slitting will include knife lubrication, heated and chilled knives, and non-stick surface coatings.
Trim and Bleed Slitting
Discussion includes common trim knife selection and arrangements for Razor, Crush and Shear slitting. Bleed trim slitting is presented for consideration to help minimize High Roll Edge profile when slitting at more than just edge trim locations. A brief comparison of suction and winding trim removal systems is included with basic do’s and don’ts. Common trim removal problems are also presented.
Razor, crush knife and anvil rolls, and shear top and bottom knives re-sharpening concerns are presented. Also discussed are knife sharpness realities and the effects of running dull knives.
Methods to inspect re-sharpened knives that can ensure they meet your requirements are also presented. Important to know is how changing a shear knife shape can lessen the web fracture quality. Certain knife housekeeping procedures are also provided.
Electrostatics in Web Handling
Static charges cause many problems including coating defects, sheet sticking, and sparks that can damage release liners, reset control systems, shock operators, and ignite solvent vapors. The human suffering and economic losses from static electricity are largely preventable.
This half-day short course begins with a review of Fundamental Electrostatics with demonstrations to illustrate ideas and reinforce understanding. Following is a session focused on Applied Electrostatics illustrating charging sources and the performance of commercially available static dissipators. Static control best practices for roll-to-roll productions operations are reviewed.
Some questions that will be answered in this seminar: