Web Coating Blog

Troubleshooting Common Web-Handling Problems In A Flotation Dryer

Dan Bemi Email: dbemi@megtec.com Regional Sales Manager
MEGTEC Systems, Inc. 830 Prosper Road De Pere WI 54115
Phone: 262-255-3275 Fax: 262-255-3578

A flotation drying system often represents the longest web span between tension isolation points on an entire coating line. For this reason, web stability inside the dryer can be a concern. Common problems include troughs and wrinkles, edge flutter, and web shift. In order to identify and deal with these web-handling issues in a flotation dryer, we must first understand flotation principles.

Unlike roll support equipment where the heat transfer and web handling components of the drying process are independent (i.e. web handling via idler rolls and heat transfer via impingement air distribution nozzles or other forms of heat distribution), flotation dryers combine these process components into the functional design of the flotation nozzles or air-bars. Therefore, air-handling uniformity is far more critical to the web-handling performance of a flotation dryer than it is with roll support technology.

What is a Blog? How is it used?

The purpose of this post is to help with understanding and using the AIMCAL Blogs.

The information on this blog is delivered in the form of 'posts'. Each time a new 'post' is made it goes to the top of the front page. The next oldest post is below that, and the next below that and so on. The front page of the blog will contain the ten most recent posts. To find older posts. Use the Archives in the right-hand column, the categories in the right-hand column, or use the search box in the right-hand column. For more information about blogs, please use the links below.

• Welcome to AIMCAL Blogs
• Google's Blog Definitions Page
• Wikipedia Entry on Blogs
• Web Coating Blog Archives Page
• Ask A Question

If you need technical support, please send an email to blogmaster@aimcalblogs.com, and include the following information:

1. Description of error or problem
2. Type of operating system (ie. Windows, Linux etc.)
3. Type of browser (ie. Internet Explorer, Firefox)

Thank you for using the Web Coating Blog!

AIMCAL Taps Experts, Launches Four Industry Blogs

FORT MILL, SC – Four Blogs sponsored by the Association of Industrial Metallizers, Coaters and Laminators (AIMCAL) go live on August 1, 2005, to help members of the converting community locate the information they need about new technology and issues facing their organizations and the industry. The AIMCAL Blogs also serve as a more interactive new home for the popular Technical Q&A section in the Ask AIMCAL part of the association’s website, www.aimcal.org, where readers pose questions related to metallizing, coating or laminating and experts in the technology provide answers.

The Blogs cover four subject areas: Web Coating and Laminating at www.WebCoatingBlog.com, Vacuum Web Coating at www.VacuumCoatingBlog.com, Web Handling and Converting at www.WebHandlingBlog.com, and Specialty Web Coating at www.SpecialtyWebCoatingBlog.com.