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Improved Coating Materials and Properties

  • February 12, 2019
  • Mendenhall Inn
  • Mendenhall , PA , USA

Description

Topic: “Improved Coatings Materials and Properties”

Speaker:  Wenxiao Sun, PhD – Henkel Corporation

Bio:

Wenxiao holds a BS in Plastics and Polymer Engineering from East China University of Science and Technology and a PhD in Materials Science from Central Michigan University.

Wenxiao is a Sr. Development Chemist working at Henkel Corporation Bridgewater site. Dr. Sun develops adhesives and coatings for flexible packaging, including water-based heat seal coatings, barrier coatings and laminating adhesives. Prior to Henkel, she worked three years as an R&D engineer in China to develop PU coatings and composite grease material. While studying for her PhD in Material Science at Central Michigan University she focused on bio-based plasticizers and flame retardants. The broad range of knowledge has helped a lot in Dr. Sun’s current role as a product development chemist developing new adhesives for different applications, such as food packaging, construction materials for buildings and airplanes, etc.

Abstract: Many common items at grocery and retail stores are packaged in flexible packaging, with a global market size estimated at USD 221 billion in 2016. These packages are normally constructed by several layers. Each layer serves its own beneficial purpose, such as protecting the printed image, sealing the package or protecting contents from biological contamination, oxygen and moisture. Aluminum foil is an example of a traditional barrier film used for food packaging. But aluminum foil has disadvantages of being fragile, subject to corrosion, and non-transparency. A new water-based barrier coating has been developed that is ready to use and provides oxygen barrier properties. This PVOH/EVOH based barrier coating has excellent oxygen barrier at low coat weight, is not susceptible to corrosion, and has very high clarity upon drying. The challenge of this product is poor shelf stability. A series of formulas are under development to overcome the short shelf life. Optimization between shelf life and oxygen barrier property has become the final step. 

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