MANUFACTURE OF PERIPHERAL RUBBER TAPE FOR SANDAL

PURPOSE:To obtain a peripheral rubber tape for sandal with durability and a soft touch at a low cost by forming projections integrated with an unvulcanized rubber sheet which is partially bonded on the surface of cloth with a specific void ratio by means of calender rollers 3, 3'. CONSTITUTION:Cloth 1 having a void ratio of 15-35% and an unvulcanized rubber raw sheet 2 are bonded by means of calender rollers 3,3', and a part of the rubber raw sheet 2 is anchored through structural interstices 11 of the cloth, and then is pressed into the recessions made on the surface of the other roller 3, so as to protrusively form projections 21, 21... partially Integrated with the rubber raw sheet 2 on the rear surface of the cloth 1. Herein, in the case of the void ratio is lower than this, when the rubber raw sheet 2 and cloth 1 are bonded each other, an anchoring operation becomes hard due to Its decreased anchoring property of the unvulcanized raw sheet, so that projections 21, 21... integrated with the rubber raw sheet 2 can not be formed on the surface of the cloth 1. On the contrary, in the case that the void ratio Is higher than this, when they are bonded by the rollers 31, 3', the anchoring property of the rubber raw sheet 2 becomes good too match, the cloth 1 can be embedded in the rubber raw sheet 2, resulting in losing the softness or three-dimensional effect thereof.