Web handling and winding specialist This email address is being protected from spambots. You need JavaScript enabled to view it. has 25+ years of experience in the field. He is President of TJWalker+Assoc. and has helped over 100 companies in processes involving paper, film, and foil-based manufacturing...more

WHQuiz Answer #13 - Web Wrinkling vs. Speed

WebHandlersQuiz 13: Wrinkling - If you see wrinkles at low speeds, but the wrinkles go away at higher speeds, what is the most likely reason? 

Many wrinkle mechanisms are dependent on traction. As speed increases, air lubrication can reduce web-to-roller traction. Without traction there may not be enough force applied to the web from the roller to cause lateral bending (the source of shear wrinkles) or compress the web laterally beyond the buckling criteria.

More on this topic was covered in this archived Web Lines column: 

Optimizing Traction August 2002

If you missed it, here are all 20 questions in my Web Handler's Quiz

Subscribe to PFFC's EClips Newsletter