Double-hardness rubber substrate for shoes for physical fitness tests and preparation method thereof

Abstract

A double-hardness rubber substrate for shoes for physical fitness tests and a preparation method thereof are disclosed. The substrate includes a high-hardness rubber material the hardness of which is50-60 A and a low-hardness rubber material the hardness of which is 30-40 A. The low-hardness rubber material includes, by weight, 60-80 parts of natural rubber, 20-40 parts of polybutadiene, 5-10 parts of polyurethane micropore elastomer, 1-3 parts of polyolefin elastomer, 10-20 parts of white carbon black, 4-5 parts of a white carbon black activating agent, 1-3 parts of sulfur, 3-5 parts of zincoxide, 1-3 parts of stearic acid, 1.1-3 parts of an accelerator, 1-3 parts of an antiager, 5-10 parts of naphthenic oil, 2-5 parts of a coupling agent and 2-4 parts of coumarone resin. The substrateis light, good in strength, wear-resistant, and tight in bonding of the double hardness materials, is not liable to break and is particularly suitable for preparing shoes for physical fitness tests.

Description

technical field [0001] The invention relates to the technical field of rubber base materials, in particular to a rubber base material for physical fitness testing shoes and a preparation method thereof, in particular to a rubber base material for physical fitness testing shoes and a preparation method thereof. Background technique [0002] Physical fitness test refers to the determination of a person's physical fitness. Physique is the material basis of human life activities, labor, and work ability. For physical fitness tests for different groups of people, most of the test items include running, jumping and other test items. Therefore, it is necessary to use a pair of physical fitness test shoes with light weight, tensile strength, elongation at break, and good wear resistance during the test. . [0003] China is currently the world's largest producer and exporter of footwear. The main materials for shoe soles are rubber, PU, ​​PVC, MD, TPR, TPU, EVA, etc. Rubber soles...

AI Technical Summary

Problems solved by technology

[0003] China is currently the world's largest producer and exporter of footwear. The main materials for shoe soles are rubber, PU, ​​PVC, MD, TPR, TPU, EVA, etc. Rubber soles are non-slip, high elasticity, good wear resistance, and are not easy to wear. The advantages of fracture, good elongation, and stable shrinkage can be said to occupy half of the footwear products. At present, most of the finished shoes of domestic first-line brands use rubber soles, but the disadvantage of rubber soles is that they use low-cost formula products. Unsatisfactory physical properties; if you want to make a high-quality sole, the cost of the rubber formula used is generally high

[0004] The wear resistance of the sole of the same material is balanced, but in the process of people wearing shoes in daily life, the wear intensity of different positions of the sole is not balanced, and the wear intensity is the largest at the position of the heel and the rear end of the sole slightly on the left and right sides ( That is, the back support of the sole), there is little difference in the wear strength of other positions except the center of the foot. The problem brought about by this phenomenon is that during the wearing process of the shoes, other parts of the sole are intact, and the back support will soon be missing, resulting in the wear of the entire shoe. Deviated and deformed, scrapped ahead of time

[0005] In the prior art, there are two methods for making soles with a combination of hardness. The main method is to use low-density materials for the forefoot and high-hardness materials for the heel. However, the oxidation resistance of the two materials is different, resulting in a combination of the two hardnesses. There are obvious marks on the part, and there is a risk of disconnection and broken bottom at the junction of the two materials

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