| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a winding core that has excellent durability, while preventing the generation of a trace of a step when sheet-like material is wound. <P>SOLUTION: The cylindrical winding core 10 is used to wind up the sheet-like material. The winding core includes: a winding core body 1; an elastic layer 2 provided on an outer peripheral surface of the winding core body; and a surface protective layer 3 provided on the outer peripheral surface of the elastic layer. The elastic layer has a hardness of 50 Asker C or lower, the surface protective layer has a hardness higher than 50 Asker C, and the whole of the winding core has a hardness of 50 Asker C or lower. <P>COPYRIGHT: (C)2013,JPO&INPIT |
