Blogs
Web Handling & Converting Blog: Roll-to-Roll Vacuum Deposition of Barrier Coatings
A new book by one of AIMCAL's favorite blogmasters, Dr. Charlie Bishop, is hot off the press. Heck, its even got "roll" in the title so we better take notice. Roll-to-Roll Vacuum Deposition of Barrier Coatings presents a practical guide...
Vacuum Web Coating: Why polymer films can differ & hence may respond differently to the same
When monomers are polymerised into polymers it is possible for some to add monomer to extend the polymer chain length in different ways. For example in polypropylene the methyl groups can be added on one side of the polymer chain only, known as isotactic polypropylene, or the methyl groups can be
Web Coating Blog: Web Coating Streaks Part 2
Web Coating Streaks Part 2 Streak Elimination Once streaks are observed on the coated web, it is obviously essential to start a technical program should be undertaken to determine cause of the streak and to implement corrective action. As discussed in Part 1, there are many different types of
Specialty Web Coating Blog: Fennagain Blogs Again
After a brief hiatus, the Specialty Coating Blog, www. SpecialtyCoatingBlog.com, returns to cover converting advances, particularly those that rely on multiple technologies, and therefore fall somewhat outside the purview of AIMCAL’s four other blogs. Potential topics include flexible displays,
Extrusion Coating Blog: Improving adhesion with coextrusion
In my last post I discussed the impact on adhesion of resin selection and the processing temperature of LDPE. But as line speeds are increased it is more difficult to have the LDPE properly surface modified in the air gap...
Vacuum Web Coating: Something to look forward to - Converting Quarterly
PRESS RELEASE August 23, 2010 FOR MORE INFORMATION, CONTACT: AIMCAL OFFICE: Tel: 803-802-7820; Fax: 803-802-7821 E-mail: aimcal@aimcal.org; Website: www.aimcal.org AIMCAL Launches CONVERTING QUARTERLY New technical publication to serve the information needs of web-processing, converting and
Vacuum Web Coating: Answer to questions on Cold Cap & position of cryocoils
We have a Varian make diffusion pump nhs-35. the pumping speed is 50000 ltr/sec. in which we supply the water of 22 deg celcius in the cold cap of diffusion. If go for down temp. in minus side there is any effect in pumping speed of pump. The purpose of the cold cap is to help prevent backstreaming
Web Coating Blog: DEFECTS SURVEY
I would appreciate your help in determining the various types of defects are encountered in the coating and drying process, by answering the following questions Please list the 6 highest loss coating defects encountered in your facility. Defect coater type 1. 2. 3. 4. 5. 6. When complete, Please
Web Coating Blog: Most Prevalent Web Coating Defects
Most Prevalent Web Coating Defects I am in the process of preparing a series of articles on web coating process. They will appear in the newly launched Converting Quarterly. The series would deal with defects and each article would go into some depth on a specific defect. The first one is streaks
Vacuum Web Coating: Response to question re. pinholes
Question As far as the source of the pinholes concerns, besides of having a visual inspection and comparison of the appearance of the pinholes, what other type of analysis could be considered in order to be able to understand and therefore eliminate the problem? What would be the recommendation to
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