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My company designs and builds web handling equipment. Like the name (Converter Accessory) indicates we supply accessories like wrinkle removal systems, air shafts and chucks and safety chucks. When we are quoting our equipment, one of the most important operating specifications we are required to get is how much tension our customers are running in their machine. However, at least 75% of our customers have NO IDEA what tension they run. Here are some ways you can estimate or determine your tension.
The machine designer must determine required tension levels for each zone. Often times required tension levels can only be determined after actually running the web through the machine, since all webs and all processes are somewhat unique. TAPPI (Technical association of the Pulp and Paper Industry), as well as many other industry organizations, publish estimated proper tension levels for several different types of webs and lamination. However, keep in mind these values are only guidelines and "best estimates" based on many years of combined industry experience. The actual best tension to run your specific web and process will, most likely, vary from the guideline. Another very general rule of thumb is proper web tension is usually between 10-25% of the tensile strength of your web.
You can measure the tension at which you currently run your process. There are several methods for doing this.
**DISCLAIMER - A great deal of time has been invested in the development of our weekly tech tips. To the best of our knowledge, they are accurate. It is up to the user to verify all results.|
THE AUTHOR ASSUMES NO LIABILITY CONNECTED WITH THE USE OF THIS INFORMATION OR THE RESULTS OBTAINED FROM IT.
201 Alpha Road
PO Box 188
Wind Gap PA 18091-0188
Phone (800) 433-2413 -(610) 863-6008
Fax (800) 709-1007 - 610) 863-7818
What is Web Handling?
Web Handling is the science, engineering and equipment necessary to successfully transport a continuous flexible material through various processes without defect. Enhancing Web Handling with proper equipment will ensure materials are processed at their maximum efficiency, allowing the process to generate maximum profits.
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