低エネルギー電子線均質照射によるポリプロピレン(PP)とナイロン 6(PA6)積層シートの高速接着

Abstract

2-layer laminated sheets (PP/PA6) with polypropylene (PP) and nylon 6(PA6) were prepared by applying low dose homogeneous low energy electron beam irradiation (HLEBI) prior to hot-press under 10 MPa, 403 K and 3 min. Although the adhesion of the PP/PA6 was often observed with a weak hot-press without HLEBI, the HLEBI (≦1.29 MGy) induced adhesion raised the bonding forces as evidenced by using the adhesive forces of peeling resistance (oFp). Based on the 3-parameter Weibull equation, the lowest oFp value at peeling probability (Pp) of zero (Fs) could be estimated. An increasing trend in Fs occurred by applying HLEBI up to 0.64 MGy reaching a maximum at 21.98 Nm−1, improving the safety level without radiation damage. When HLEBI cut the chemical bonds in PP polymer and generated not-terminated atoms having dangling bonds, they probably induced the chemical bonding. Thus, increasing adhesion force between the laminated sheets could be explained.