Process for the manufacture of paperboard cartons

摘要

This invention relates to an improvement in a process for forming a carton from paperboard stock comprising the steps:
applying an aqueous based adhesive to select parts of a paperboard carton blank obtained from a paperboard feedstock;
drying the aqueous based adhesive;
folding the select parts of the adhesive coated carton blank onto cooperating parts of the paperboard blank; and,
heat sealing the select and cooperating parts thereby forming the carton; wherein the aqueous based adhesive is comprised of a vinyl acetate/ethylene polymer formed by emulsion polymerization and having
(a) a crystalline melting point (T m ) ranging from 35 to 110 °C, preferably 50 to 90 °C; measured at a heat rate of 20 °C/minute and,
(b) a tensile storage modulus of at least 1 x 10 4 dynes/cm 2 at 115 °C measured at 6.28 rad/sec.