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Blogmaster: Dr. Edward D. Cohen

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Coating All Other

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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Posted in: Coating All Other
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16

Know your coater-design capabilities

Posted by Edward Cohen on June 16, 2011
To insure that new and improved products being introduced into existing coating lines can be made with excellent quality and low cost; it is essential to know the performance capability of the coater being used. The reason for this is that the needed product process conditions could be outside of th...

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18

What is the impregnation-coating process, and why is it used?

Posted by Edward Cohen on May 18, 2011
The impregnation coating process, also called saturation coating, is used to coat porous substrates that have a substrate structure consisting of pores that penetrate the entire substrate. This process coats the internal web structure and fills the pores with a variety of thermoset polymeric resins ...

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Posted in: Coating All Other, Substrates
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12

What is the patch-coating process, and why is it used?

Posted by Mark Spaulding on May 12, 2011
The patch-coating process is used to coat a substrate with discrete shapes, or patches, that require an uncoated border around the shape. The coating is in separate, discreet patches over the entire web. The need for this type of coating has increased because of a variety of new products that need t...

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11

Why pre-metered slot-die coating is increasingly popular

Posted by Mark Spaulding on May 11, 2011
Slot-die coating is a relatively new precision coating technique, which is increasingly replacing standard roll-coating methods because of several technology advances that have increased the quality, productivity and range of products that can be coated. These advances, along with improvement in met...

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Posted in: Coating All Other, Coating Applicator, Slot Die, Slide, Curtain
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01

Happy New Year 2011

Posted by Edward Cohen on January 1, 2011
Happy New Year 2011 From Ed Cohen May health, happiness, good times and prosperity greet you and your families each day of this New Year.  May we all gain some additional knowledge to help us to do a better job in our vocation, hobbies and all aspects of our lives.    
Posted in: Coating All Other
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29

The Importance of Web Coater Process Modules

Posted by Edward Cohen on December 29, 2010
In order to effectively scale-up and manufacture web-coated product, the functioning of the coating lines Process Modules is important. These modules are the hardware units that are required to do all of the transformations needed to produce the final product. There are 8 major functional elements a...

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Blogmaster

Edward Cohen photo

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.