1 / 16

Technical Review-Heat Seals

AVPM Annual Meeting October 6, 2009 Peter Garvin RPET Blisters and the impact on Heatseal Technology. Technical Review-Heat Seals. Components Blister types Adhesive Technologies Current Status. Technical Review-Heat Seals. Blister Type Traditional PVC – Vast Majority of Market

hedva
Download Presentation

Technical Review-Heat Seals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. AVPM Annual MeetingOctober 6, 2009Peter GarvinRPET Blisters and the impact on Heatseal Technology

  2. Technical Review-Heat Seals Components • Blister types • Adhesive Technologies • Current Status

  3. Technical Review-Heat Seals Blister Type • Traditional PVC – Vast Majority of Market • PET & RPET Blisters -Expanding

  4. Technical Review-Heat Seals Blister Type – other impacts • Blister Flange – need a minimal size to ensure heatsealing operation adherence of the blister to the ink/board stock • Mold Release & denesting lubricants – need minimal amounts to preclude disruption of adhesion

  5. Technical Review-Heat Seals Visual Carded PackagingComponents & Assembly Plastic Blister Blister Flange Blister Flange Heat Seal Coating Printing Ink Clay Coating Clay Coating FINISHED SHEET Clay Coating BASE SHEET Chemical Sizing Paperboard Chemical Sizing

  6. Technical Review-Heat Seals Adhesive Technology • The adhesive itself is applied over wax-free inks on the blister board • The heatsealing operation allows the molten adhesive to wet out the blister and the ink/board

  7. Technical Review-Heat Seals Adhesive Technology • The adhesive does not “dive in” to the board as originally thought. (Determined by AVPM technical committee analysis) • Thus – the blister itself is vital to a proper and secure structure • A proper seal is the result of the bond between blister and ink/board, being strong enough so that the board ruptures in the base sheet (not clay split!!)

  8. Technical Review-Heat Seals Adhesive Technology (Solvent Base) • Applied off-line in second step on roll-coater over dry inks (may require spray powder) • Able to adhere to a wide variety and “quality” of blisters – most forgiving technology – better wets out the flange. • EVA and Vinyl Technologies • Solvent recovery or incineration required

  9. Technical Review-Heat Seals Adhesive Technology (Water – Base) • Applied in-line over wet ink on a litho press equipped with an in-line coating unit • Lower cost than off-line coating - 1 step process • PUR and Acrylic Technologies

  10. Technical Review-Heat Seals Current Status • “Green” concerns drive the blister package to more environmentally friendly components • Board stock is repulpable (Beloit Study) • Heatseal Adhesive – Currently water-base, devoid of organic solvents / and in-line which eliminates a second operationwhich reduces energy and cost

  11. Technical Review-Heat Seals Current Status – Blisters • PVC Blisters – Issue with environment (Chlorine) Being greatly reduced and eliminated in EU and now in North America • Recyclability provides for “better score” on Walmart score card as well as with the consumer/customer – Hence RPET!!!!

  12. Technical Review-Heat Seals Current Status – Blisters – RPET • RPET Blisters vary in amount of “recycled” components • This may vary the surface energy and corresponding effect on the ability of the adhesive to wet the substrate and adhere the blister to the ink/board

  13. Technical Review-Heat Seals Current Status – Blisters – RPET • Thus to overcome the variation – solvent base systems provide the safest solution (traditional system with the ability to wet out the film when sealed) • Solvent base (EVA) in effect “covers the sins” of the variation inherent in typical RPET blister stock

  14. Technical Review-Heat Seals Current Status – Blisters – RPET • Water base systems (PUR) - are being developed to allow for their benefits (one-pass / no organic solvents) • This will take the Blister Package to the “greenest” option • Best bet is to test the combination of board /ink / heatseal coating / blister in the laboratory prior to approval

  15. Technical Review-Heat Seals Current Status – Blisters - RPET • When completed make sure to specify each component!!! • With the same board – ink – heatseal / and specified RPET!!! This structure should provide the optimal desired and properly sealed package!!!

  16. Technical Review-Heat SealsQuestions??Thank you!!!Peter GarvinHenkelPeter.Garvin@us.henkel.com(513) 417 - 3980

More Related