| 摘要 |
Aqueous composition for use in heat sealing comprising a combination of polyester and acrylic polymers (the latter preferably being in situ formed), where the combination is in the form of an aqueous solution, and the polyester having number average molecular weight < 2500 (preferably </= 2100) and the acrylic polymer having Tg of 5-105 DEG C, and where the solubility of the polymer combination in water is provided by or contributed to by the presence of carboxylate and/or sulphonate anion groups borne by at least the polyester. Also the use of such a composition for heat sealing and a method of heat sealing a film using such a composition. |
