Narrow Results

Good tensile strength of a laminated film for packaging is an indispensable property in preventing leakage. It is known that the peel strength between laminated film layers is closely related to the tensile strength of the film. In this study, we have measured the tensile strength for various peel strengths of two kinds of three layered laminated film; Nylon + Aluminum + Polyethylene and Nylon + Polyester + Polyethylene. These films have two peel layers, so we escalated one peel strength and fix another one. Then we found that the peel strength between the sealant and the boundaries strongly influences the tensile strength. About Nylon + Polyester + Polyethylene film, we researched applied amount of adhesive and observed cross section of specimen at measurement of peel strength. Then we found that there is difference in specimen condition at measurement of peel strength, and examined about relationship of peel strength and stiffness of specimen.

The paper prepares Cu/Al composite sheets through the way of interface micro-alloying and cold-rolled composite. And it studies the peel strength, interface structures and the growth process of metal compounds by using such methods as SEM, XRD etc. The main research harvests are as follows ：(1) The interfacial peel strength of Cu/Al composite sheets reaches a maximum number at the conditions of 550°C, heat 1h; (2) Interfacial structures at the interface of Cu/Al composite sheets are CuAl2, Al5Cu6Mg2, CuAlCu9Al4 at the conditions of 500°C, heat 1h; (3) The growth process of metal compounds as follows: incubation period → local nucleation → new nucleation and growth along the interface → growth along the interface into pieces → growth along the direction perpendicular to the interface.