The structure of the sole is quite complex. In a broad sense, it can include all the materials that make up the bottom, such as the out-sole, the mid-sole and the heel.In a narrow sense, it only refers to the out-sole. Generally, the common characteristics of sole materials should be wear-resistant, water-resistant, oil-resistant, heat-resistant, pressure-resistant, impact-resistant, elastic, easy to fit the foot shape, and not easy to deform after shaping. Heat preservation, easy to absorb moisture, etc., and at the same time, it is necessary to cooperate with the mid-sole, and it has a braking effect when walking and changing feet, so that it will not slip and be easy to stop and other conditions.
There are many types of sole materials, which can be divided into natural bottom materials and synthetic bottom materials. Natural base materials include natural base leather, bamboo, wood, etc., and synthetic base materials include rubber, plastic, rubber-plastic composite materials, recycled leather, elastic cardboard, etc.
However, due to the strain created by the flexing of the foot, the sole may wear and crack or break；There are also sharp edges to cut nicks and punctures, and cracks or fractures will also occur, and will gradually become cracks during continuous deflection；
Extreme temperatures (especially minus degrees Celsius) and contamination (such as engine oil) can also accelerate shoe sole cracking.
Therefore, it is very important to test the flex crack resistance of the sole.
The Shoes Ross Flexing Tester is used for flexing test at a 90°angle of rubber products, sole materials, PU, etc. by subjecting specifically prepared specimens to repeated bend flexing. The damage and cracking condition is then observed.6 groups (12pcs) can be measured at the same time;The speed is adjustable(60~100c.p.m).It meets standards with ASTM-D1052, SATRA TM60 and ISO-5423.
More detail please refer:
https://www.labtesting-equipment.com/sale-11220407-footwear-testing-equipment-astm-d1052-satra-tm60-ross-flexing-tester.html
Operation video:https://youtu.be/3iv76dJ7Diw
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