The Plastic Film and Foil Web Handling Guide [Hardcover]

Written to assist anyone who works with webs directly or indirectly, The Plastic Film and Foil Web Handling Guide is a handbook for diagnosing and correcting problems with web handling technology. Covering web handling fundamentals, process-related technologies, troubleshooting, and solutions, it includes sufficient technical information to identify and correct defects in rolls (of film or foil). Readers will appreciate this unbiased look at web handling that also serves as a counterpoint to information from equipment suppliers.

The text presents guidelines on:

Roller alignment in machines
Tensioning of webs
Use of web spreading and guiding devices
Use of razor slitters
Shear knife slitters
Edge trim removal
Trim disposal
Management of electrostatic charges on webs
Waste storage equipment

Winding technology is presented that addresses gage variation issues, cores and mandrels, vibration, speed issues, web thickness issues, web strength issues, coated web issues, laminated web issues, clear film issues, winding tension profile issues, and lay-on roller issues. A guide for troubleshooting web-handling problems and a glossary of terms for quick reference is also provided.WEB STABILITY
Imaginary Resistive Tension Member Concepts
Alignment Requirements
Structure & Stresses Affect Film Web Behavior
Tension Limitations
Tensions Limitations with Temperature

TENSION ISOLATION
NIP Roller Tension Isolators
Three-Roller NIP Systems
S Wrapped Driven Rollers
Vacuum Rollers
Vacuum Belts

WEB TENSION MEASURING AND CONTROL DEVICES
Web Tension Sensing
Dancer-Roller Systems
Load- Cell Rollers
Mass-Free Dancer Sensing

WEB SPREADING
Increased Diameter under Web Edges
Concave Rollers
Bowed Spreader Rollers
Air-Bearing Spreading
Angled Oppl3.