| 摘要 |
: A method of forming a heat-sealable carton (5) having a pair of mating surfaces (15,19) to be sealed includes the steps of coating at least one of the carton surfaces with a heat-activated thermosetting adhesive (37), spraying a fine mist of a water-based adhesive (39) 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(15, 19) in contact with each other and applying pressure for a time sufficient to seal the contacting surfaces together. A carton (5) is provided with flaps (15, 19) sealed by the combination of thermosetting heat-activated adhesive (37) and high tack water-based adhesive (39). This allows the mating surfaces (15, 19) to be rapidly sealed by automatic carton closing apparatus (1) and results in a sealed carton (5) which exhibits good seal integrity at high temperatures. |
