Specialty Adhesive

Request Number N873270
Need details

Sealed Air seeks new materials that are compatible with polyethylene (PE) and provide adhesion only when in contact with itself under high pressure.



Some mail pouches are produced from solely from polyethylene.  These mailers can be easily reprocessed (recycled). However, the protective strip that covers the envelope flap adhesive is not compatible with a polyethylene melt stream, and certain adhesives may contaminate the recycling stream.  Sealed Air would like to identify new adhesives or other closure methods that eliminate the need for protective strips (which pose a litter problem) while preventing inadvertent or unintentional sealing of the mailer flap to itself or adjacent envelopes. 


Ideal solutions will be compatible with application to PE, will not require a protective strip over the adhesive, and will allow multiple mailers to be stacked upon one another without them getting stuck to themselves.  Sealed Air is only interested in technology that can be immediately demonstrated and is very interested in novel closure approaches.


Key Success Criteria
  • be compatible with PE from both an application standpoint and a recycling one
  • provide a good seal only when intended (ie. in contact with itself or under pressure)
  • allow mailers to be stacked without incidental bonding and without the use of protective strips over the adhesive areas
  • be currently demonstrable and/or have strong supporting data
  • have a cost structure consistent with current envelope closure pricing
  • provide a strong, tamper proof seal
  • preferably a melt application to deposit adhesives


Possible Approaches
  • Non-adhesive closure technologies
  • Two surface methods that bond to opposing faces, but resist self-bonding
  • Biomimetic approaches (like gecko or barnacle materials)


Approaches not of interest

The following approaches are not of interest:

  • Approaches that cannot be applied to an PE substrate
  • Approaches that require a protective strip
  • Materials that melt at temperatures greater than 190°C



Preferred Collaboration types
  • To Be Negotiated
Items to be submitted

We are looking for a concise abstract/executive summary. The proposal should briefly describe the technical approach and provide information on technology performance, background and description of the responding team and their related experience. To respond, please use the red Respond button.


Please note that only non-confidential information can be accepted.  By submitting a response you represent that the response does not contain and will not be deemed to contain any confidential information of any kind whatsoever. 


Point of Contact
Jonathan Jakischa
Area of Interest
  • Materials Processing
  • Plastics
  • Polymers
Sealed Air Corporation
Due Date
December 31, 2016
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