抄録
In recent years, plastic packing is causing a new social problem as a generator of plastic garbage or a new source of environmental pollution. Attracting attention in this respect is laminate packing with which plastic can be more efficiently utilized than with conventional plastic packing. Since the laminate packing uses composite material consisting of sheets of extremely thin film pasted together, easy breakage has been experienced in many cases during services. A countermeasure experimentally applied was to increase thickness of a part of sealed portion of the laminate film to improve tensile and impulsive tensile strength. Investigated in addition was the effect of seal length. As a result, it was confirmed that up to a certain thickness a proportional relationship was maintained between the thickness and tensile/impulsive tensile strength. Also found was that there was a certain seal length with which the tensile/impulsive tensile strength was effectively improved.
