Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1979-04-19
1981-02-10
Gallagher, John J.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
53477, 53484, 53491, 93129, 156310, 156315, 156322, 156332, 229 31, 229 48SA, 229 48SB, 229 48T, 426107, 426113, 428200, 428483, B32B 714, C09J 504
Patent
active
042499780
ABSTRACT:
A method of forming a heat-sealable carton having a pair of mating surfaces to be sealed includes the steps of coating at least one of the carton surfaces with a heat-activated thermosetting adhesive, spraying a fine mist of a water-based adhesive which exhibits high contact tackiness when dry, to form a discontinuous film on the coated surface, heating the water-based adhesive coated surface to a temperature sufficient to dry the water-based adhesive and activate the thermosetting adhesive, placing the mating carton surfaces in contact with each other and applying pressure for a time sufficient to seal the contacting surfaces together. A carton formed by the method is provided with flaps sealed by the combination of thermosetting heat-activated adhesive and high tack water-based adhesive. This allows the mating surfaces to be rapidly sealed by automatic carton closing apparatus and results in a sealed carton which exhibits good seal integrity at high temperatures. A carton formed in this manner is useful, for example, as a food container which can be placed directly in an oven to heat the contents thereof, with the carton seal being unaffected by the oven heat.
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Gallagher John J.
Kliklok Corporation
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