Blogs
Vacuum Web Coating: How frying pans might help in reducing wrinkling.
In looking at the problem of wrinkling and heat management the question of what is the best surface for the deposition drum came into mind again. Traditionally it has always been recommended that the deposition drum material should have a...
Web Handling & Converting Blog: Wrinkles in a Vacuum Metallizer
Thin film is wrinkle prone on any machinery and that certainly includes vacuum metallizers. Yet given all of the ordinary sources such as imperfect webs (bagginess etc) and imperfect rollers (alignment and diametral tolerances), metallizers have one additional serious mode...
Vacuum Web Coating: Water cooling – a hidden benefit & potential problem
Many of our coating machines use cooling systems. Some have systems that recirculated the water but others use mains water and exhaust to drain. The cooling systems can be operated differently. There are many systems I have seen where the...
Vacuum Web Coating: Problem of wrinkles in cast polypropylene (CPP) films
Q: I have a question about CPP metallized, what I can do to avoid the wrinkles in the cooling drum deposition because with BOPP metallized we don’t have this problem. The raw material of the base to metallized has to...
Vacuum Web Coating: Webinar - Winding webs in vacuum Q & A 6 - gas flow for improved heat transfer
Q: What is the recommended gas flow for heat transfer? Q: What gases do you recommend for the injection method between the film and the drum to improve heat transfer in vacuum. A: This is another question to which there...
Vacuum Web Coating: Webinar - winding webs in vacuum - questions and answers 4
Q: we have MD wrinkles in the heating zone on a drum-free machine. is a spread roller a solution in this situation, and how is the radius variation determined for such a spread roller? A: Normally when using a spreader...
Vacuum Web Coating: A question about faults on a CPP film.
Question Our CPP for metallize grade have problem about tin-canning and film stretching when we metallized film wrinkle and blocking Answer All the problems you are experiencing during metallizing sound to be a problem of the web over heating during...
Web Handling & Converting Blog: Name That Defect 11 - Crepe Wrinkle
This begins the first in a series of user submitted defect descriptions. Send me your pic and problem description and I will do my best to figure it out or tell you where to go (for more help). I promise...
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