2020 WIST Courses

Coating and Lamination in Packaging Applications

January 16-17, 2020
University of Wisconsin-Stevens Point


July 23-24, 2020

University of Wisconsin-Stevens Point


This course is designed for those working in paper converting, coating, printing and flexible packaging. 

The content will be particularly beneficial to engineers, technicians, chemists, scientists, sales representatives, and customer service representatives. Representatives of companies that supply adhesives, inks, silicones, papers, plastic films and aluminum foils will also find this curriculum very useful.

Participants receive eight hours of classroom instruction, four hours of hands-on experience on state-of-the-art equipment, lunch and break refreshments both days.

The Instructor

Expert instruction is offered by Dr. Roland Gong, assistant professor of paper science and engineering at the University of Wisconsin-Stevens Point. 

Gong earned his doctorate in paper and imaging science and engineering from Western Michigan University, where he researched paper coating using new materials and cutting-edge facilities. 

Gong's research focused on the paper pigment coating process. He has worked on coating and lamination since 1998 as a printing and packaging engineer. His work has included product packaging and liquid packaging.

Learning Outcomes

  • Understand coating and lamination fundamentals and their applications
  • Recognize the various types of coaters and laminators and their applications
  • Understand workflow and unit operations
  • Recognize the raw materials and their properties, and learn their influences on the final products
  • Understand test basics
  • Apply the knowledge in operation and quality control
Course Contents
  • Raw materials: paper, film, aluminum, adhesive
  • Substrates surface properties and modification
  • Multiple layer strategies
  • Facilities: coater and laminator, unit operations, treatment and modification
  • Defects identification and troubleshooting
  • Test and evaluation
Course Agenda

Materials and Properties 
  • Package type
  • Monolayer and multilayer packaging materials
  • Function of each layer, such as strength layer (PP, PET, foil, paper), ink carrier layers (high surface energy, good thermal stability), barrier layers (foil, water and vapor resistance, oxygen), sealant layers (LDPE, LLDPE, EVA, EAA/EMAA, PP), adhesive layers
  • Surface properties, contact angle, lab test method, dyne/cm, surface tension, surface modification
  • Corona treatment (air or non-air), flame treatment
  • Adhesion theory including electrostatic forces, diffusion, mechanical interlock, wettability, acid base attractions, covalent bonding
  • Adhesive materials, polyurethanes, acrylics, EVA, LDPE

Coating and Lamination Methods

  • Process for multilayer packaging materials including extrusion, coating and lamination; coextrusion will be mentioned
  • Extrusion: extruder, die for cast film and blown film
  • Roll coating: mechanism of extrusion coating, liquid coating
  • Vacuum deposition
  • Lamination: method, dry and wet laminating

Unit Operation

  • Winding and unwinding, sheet-fed and web-fed
  • Extruder part
  • Liquid coating schematics, roll (gravure/flexo) coating, Mayer bar, air knife, curtain coating
  • Drying
  • Curing, heating, cooling
  • Slitting

Defects and Troubleshooting

  • Test viscosity, thickness, coating weight, odor test
  • Adhesive bond test, delamination, tensile, green tack (right after lamination test), curing test curve, peelable bond test vs destruct test
  • Un-laminated, delamination, decal, air/gas bubble
  • Screening (gravure pattern), tunneling (cross-direction wrinkle)
  • Low bond, wrinkle in lamination, curl, pleating, starring
  • Soft edge vs hard edge
  • Telescope roll

Hands-On Trial

  • Multiple coating
  • Lamination
  • Surface treatment
  • Test on-site practice

What Previous Participants Said

"Overall, this is a good introduction of lamination and coating for people in the papermaking industry working on converting/packaging. I am a research scientist in product development. My background is chemical engineering and paper making. I found this course useful and helpful for my project and helps to generate new ideas in product development."
— L. Xiao, Georgia-Pacific

"Dr. Roland Gong comprehensively covered the materials and processes of packaging coatings and laminations. This was done in a successful manner which has appropriately increased my value to my customers and my knowledge of their operation and end use needs."
— K. Helein, Daikin-America