Envelopes – wrappers – and paperboard boxes – Envelope – Closures
Patent
1995-08-18
1998-01-20
Lovering, Richard D.
Envelopes, wrappers, and paperboard boxes
Envelope
Closures
264 43, 264 433, 264 47, 283 71, 4283215, 4284022, 42840221, 523176, B32B 326, B65D 2716, G09F 310
Patent
active
057093407
ABSTRACT:
A microencapsulated adhesive and a method for producing that microencapsulated adhesive are disclosed. The adhesive is produced from a solvent-based adhesive composition such as a styrene butadiene rubber composition an acrylic. The solvent-based adhesive composition may be encapsulated by interfacial polymerization, gelatin/gum arabic coacervation or melamine/formaldehyde encapsulation. The solvent is removed from the microcapsules by heating or reduced pressure to form an adhesive that is non-tacky, but becomes tacky upon application of external forces, such as shearing. The microencapsulated adhesive composition may be used, among other applications, as an adhesive for stamps or envelopes.
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Lovering Richard D.
Moore Business Forms Inc.
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