| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively obtain required peeling performance by eliminating need for always supplying a functional oil whose concentration is comparatively high to a heating, pressuring and welding device as a releasing agent. SOLUTION: By a web 62 impregnated with the releasing agent, the releasing agent is supplied to the outer elastomer layer 48 of a welding roll 52. Then, alternate bands, that means, the areas on the web 62 are impregnated with the functional releasing agent having a functional chain whose concentration is comparatively high and the releasing agent having low functionality or non- functionality. Then, the web 62 is carried to a roll 61 from a roll 60 so as to alternately supply two kinds of releasing agent. The high-concentration releasing agent is periodically imparted in a comparatively short time at an initial time and periodically imparted thereafter at need. |
