Improved Strength and Adhesion: New EVA Material Developments for Thermal Lamination and Flexible Packaging Applications, 2016 PLACE Conference

ARE YOU A TAPPI MEMBER? TAPPI members have exclusive, FREE access to technical conference papers and presentations six months after the conference in TAPPI's e-library. The e-Library offers:

• Unlimited access to more than 18,000+ documents
• Fast, robust search engine for fast search results
• Members get FREE access to conference proceedings, TAPPI JOURNAL articles, Paper360º articles, archived Solutions! articles, and much more
• View thousands of technical paper abstracts
• Ability to search by keyword, title, author, events or industry segment

*Technical papers and presentations are available for sale immediately following the conferences before the 6 month embargo period.

Please Note: This document will be available in PDF format in the "My Electronic Documents" link on the home page once your order has been completed. Please make sure you have the latest version of Acrobat Reader. Click on the Acrobat Reader icon to check for the latest version, it’s FREE. To print a hardcopy of a PDF file correctly you must have a postscript printer. If you are not sure if your printer is a postscript printer please refer to your owner’s manual.

Purchase of electronic (downloadable) documents made at www.tappi.org by credit cards, followed by instant download CANNOT be cancelled. We do not offer refunds on electronic download documents.

We have developed a class of new ethylene vinyl acetate (EVA) copolymers with high adhesion to substrates in the extrusion coating process. Using a laboratory set up designed to model the extrusion coating of EVA onto polymer films, we coated both conventional and high-adhesion EVA copolymers onto corona-treated polyester films, and measured the force required to separate EVA from the substrate. The force required to separate the improved EVA from the polyester substrate was approximately six times greater than the peel force measured with conventional EVA. Additional experiments were conducted on a commercial-scale extrusion coating line, where conditions were systematically varied. For corona-treated polyester films run during the commercial-scale trial, the force required to separate improved EVA from the substrate ranged from 2.5 to 3.5 times greater than comparable control films. Large increases in adhesion were also encountered when corona-treated films were chemically primed, and the EVA extrudate curtain was ozone treated.