Abstract
The bottle-neck shaped seal of bags for holding liquid is particularly convenient for pouring the liquid into another container. In recent years, bags have frequently broken at the bottle-neck shaped seal because the bags were subjected to the impact during loading and unloading. Taking this into consideration, we performed impact tensile tests using two types of bags with bottle-neck shaped seals, one with barrier characteristics, i.e., laminate films of NY/alumina-evaporation PET/XA-S and NY/AL/XA-S, and one without barrier characteristics, i.e., NY/XA-S for bottle neck shaped seal diameters of 7.5, 10, 12.5, 13, 14, 15 and 20mm and flat seal bags. When the seal diameter of NY/aluminaevaporation PET/XA-S, NY/AL/XA-S or NY/XA-S is 15mm or greater, the impact tensile load at break is almost the same as that of flat seal bags.
