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Web Coating

Blogmaster: Dr. Edward D. Cohen

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Coating All Other

20

Know Your Coater Design Limitations

Posted by Edward Cohen on February 20, 2012
The number of new and upgraded products that are to be produced by the web coating process is continuing to expand. One of the characteristics of these new products are that they will be specialty products with relatively low volumes. In addition, each product will have very different product requir...

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29

Web Coating Technology Continuing Education

Posted by Edward Cohen on January 29, 2012
The web coating process is a complicated, technically sophisticated process that has many basic modules, unwind roll, transport roll, prepare coating solution, coating application, dry coated film, online process control, optimize coating solution, and coating line process control. All of these are ...

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Posted in: Coated Product Measurement & Characterization, Coating All Other, Coating Applicator Roll Coating, Coating Applicator, Slot Die, Slide, Curtain, Coating Solution Handling, Coating Solution Measurements & Characterization, Coating Solution Preparation, Defects Characterization Causes & Cures, Dryers & Drying, Laboratory & Pilot Coaters, Laminating, Metallizing, Process Instrumentation & Measurements, Substrate Surface Treatment, Substrates, Web/Tech, Weblogs
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26

Limits of coatability

Posted by Edward Cohen on December 26, 2011
Limits of coatability
In all coating processes  there is an operating region in which a uniform, stable defect free coating can be made. Outside of that region the coating is not stable  and defective coatings will be made will be produced. There are several variables, solution flow rate & wet thickness, rh...

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Posted in: Coating All Other, Coating Applicator Roll Coating, Coating Applicator, Slot Die, Slide, Curtain
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15

2012 AIMCAL Web Coating Webinars

Posted by Edward Cohen on December 15, 2011
I am in the process of developing the topics to be covered in the 2012 AIMCAL coating technology Webinar series. If there are any topics or presenters that you believe should be scheduled, send me the information. Ed Cohen
Posted in: Coating All Other
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03

Coating & Drying Process Measurements

Posted by Edward Cohen on November 3, 2011
Coating & Drying Process Measurements
A coating line is comprised of many basic process elements and subsystems--all of which must perform as specified to obtain a high-quality, low-cost product. The important components of the coating line include the solution mixing process, the coating applicator and ancillary hardware, the dryer and...

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28

AIMCAL 2011 Web Coating Conference

Posted by Edward Cohen on October 28, 2011
The AIMCAL Web Coating Conference was held in October 2011. The goal of the meeting is to provide a forum exchange of technical information personnel in the web coating Industry. There were sessions on Web Coating and Laminating Technology, Vacuum Web Coating Technology and Plenary sessions. The ...

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Posted in: Coated Product Measurement & Characterization, Coating All Other
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16

CEMA Coating and Laminating Seminar for Converters

Posted by Edward Cohen on September 16, 2011
 CEMA ( Converting Equipment Manufacturers Association) is presenting a seminar “Coating and Laminating Fundamentals for Converters. The seminar will present technical information on the major elements of the converting process,. It wlll present the the fundamentals, while giving real wor...

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11

Coating: An Old Process With A Great Future

Posted by Edward Cohen on August 11, 2011
The coating process is a very old process, ~2000 years, and is unique in that it is still in increasing use and growing in importance, when the majority of old technologies are no longer in use. It is widely used and is still significantly growing because; there are many useful and creative products...

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22

Considerations in selecting a coating method

Posted by Edward Cohen on July 22, 2011
Selecting an appropriate coating method is a challenge because there are currently many applicators in routine use and each of these has unique capabilities in terms of the coating solution variables that they can apply and the resulting coated substrate properties. Interestingly all of the methods ...

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28

Reducing coater startup time

Posted by Edward Cohen on June 28, 2011
There are two components in the time required to start a production run. The first is the time required to install the coating applicator. The second is the start-up time for a coating process is defined as the time from the initial application of the coating solution to achieving steady state opera...

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Blogmaster

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Dr. Edward D. Cohen

Dr. Cohen is a technical consultant in all aspects of the web coating process. His expertise includes thin film coating and drying process development, coating application and drying of thin films, polyester base development, film defect mechanisms, formulating coatings, image analysis techniques for characterizing coating films and litigation support.

He has over 45 years experience in coating research and manufacturing technology with the DuPont Company and as a technical consultant to the converting and composites industries

He has extensive publications in the field and has co-authored several books: Modern Coating and Drying Technology, Coating and Drying and Defects: Troubleshooting Operating Problems, and chapters in Kirk-Othmer Encyclopedia of Chemical Technology and Water and Solvent Based Coating Technology. His honors are the John Tallmadge Award for Contributions to Coating technology, the AIMCAL President's award in recognition of Meritorious Service to AIMCAL and the Converting Industry, and the ISCST Founders Award. He was the founding president of the ISCST. He has a Bachelor of Science in Chemical Engineering from Tufts University and a Ph.D. in Physical Chemistry from the University of Delaware.