| 摘要 |
PROBLEM TO BE SOLVED: To increase a durability by piling, sticking and covering the surface cover layer consisting of a rubber elastic body through the adhesive layer piled and stuck onto the oneside surface of an endless knitting core material and forming the cover layer on the core body surface. SOLUTION: As fitting the annular endless knitting 5 for a core material to the roller for belt processing, the sheet shape plastic urethane rubber with a soften point of 80 deg.C and a thickness of 70μm is joined while confronting and piled as an adhesive material layer so that there is no feed in clearance by the confront roller of the roller for belt processing. At the higher temperature (120 deg.C) by 40 deg.C than the soften point of the urethane rubber, the urethane rubber is dug into the stitch organization of the surface layer of the core material knitting, but the pressure is controlled to a pressurizing force (5 kg/cm) which is not streamed out to the backside of the core material knitting and pressed by heat. An adhesive layer 2 consisting of a thermal plastic urethane rubber is integrated by piling to the core material 3 surface layer. In the annular belt, the confront part of the adhesive material sheet is integrated by heat pressing of the core material-adhesive material layer and the endless annular adhesive layer with no joint is formed.
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