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Web Coating

Blogmaster: Dr. Edward D. Cohen

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Coating Applicator, Slot Die, Slide, Curtain

16

The Importance Of Procedures and Training

Posted by Edward Cohen on February 16, 2012
The typical coating line is a complex process that consists of 17 major components, table 1, each of which has many subsystems, that are necessary for the successful operation and can a cause defects if not functioning as specified.  The total number depends on the exact design of the coating l...

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Posted in: 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
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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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13

Simultaneous Multilayer Coating Is A Practical Efficient Process

Posted by Edward Cohen on December 13, 2011
Simultaneous Multilayer Coating Is A Practical Efficient Process
One of the many technologies that will drive the growth of the web coating process (also called Roll-to-roll) is the development of Simultaneous Multilayer Coating process. Several technology and manufacturing advances have resulted in a process that has the ability to coat a wide range of propertie...

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Posted in: Coating Applicator, Slot Die, Slide, Curtain
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14

AIMCAL Web Coating & Drying Course

Posted by Edward Cohen on September 14, 2011
  This course will present the technologies that are needed to successfully operate a web coating and drying line.  The fundamentals of each operation will be presented along with specific example of the required technologies. The course will be presented on October 37 4  in Phi...

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Posted in: 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
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07

Multilayer coating technology

Posted by Edward Cohen on September 7, 2011
Multilayer coating technology
In addition to coating single layer product structures, the web coating process can also produce multi-layer products.  This multilayer capability can be used to produce a variety of novel and cost effective products. The initial methods to produce these structures were not cost effective and r...

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Posted in: Coating Applicator, Slot Die, Slide, Curtain
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26

Consider contract coaters as part of product scale-up

Posted by Edward Cohen on May 26, 2011
Contract coaters, also called toll coaters, provide web-coating and converting services to assist other companies in the development and manufacture of web-coated products. Typically, they have extensive process facilities to accomplish this task. They have coating methods that can coat a wide range...

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Posted in: 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
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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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05

Cartridge Coaters Improve Coater Performance

Posted by Edward Cohen on January 5, 2011
Cartridge Coaters Improve Coater Performance
Cartridge coaters are a new coating hardware concept that permits rapid change of coating methods in any coater, without a long costly set-up time.  As a result, the optimum coating method for any products can be used without requiring a very long time to change methods. The basis for the need ...

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Posted in: Coating Applicator Roll Coating, Coating Applicator, Slot Die, Slide, Curtain
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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.