抄録
A web is a flexible and extremely thin material, which is used in many field such as liquid-crystal-display, solar cell etc. However, a wrinkle is generated on the web in a producing process of the web due to a misalignment of rollers. The wrinkle is a plastic deformation generated on the web in the producing line and it deprives a wroth of a function of the web. To prevent the wrinkle, a concaved roller is used but the most effective shape of the concaved roller is not found yet. Therefore we changed the shape of the concaved roller and researched the effective shape for preventing wrinkle. To declare the effectiveness for preventing wrinkle by using the concaved roller, we changed a transporting condition, web tension and misaligned magnitude of the test roller. Consequently the effect for preventing wrinkle by using the concaved roller increased with increasing of diameter difference of it. Moreover concaved roller enables to restrain a generation of a trough, which is a deformation of buckling of the web.
