Plastic runway epoch-making revolution

Human hundred meters result ran into 10 seconds for the first time, is in the 1968 Olympics in Mexico. Plateau air is thin to improve performance, but Jim hines created a world record of 9.95 seconds is the most important reason, is a comprehensive university city stadium for the first time laying Plastic toys runway. Since then the Olympic Tian Jingshi changed "everything changed. Plastic runway is also called "tower when the runway," made of polyurethane materials. In 1937, German chemist bayer found that the polymerization of isocyanate with hydrogen, the polyurethane has introduced the modern chemical industry from now on. This kind of composite material of many performance is better than that of natural rubber and plastic, regardless of the strength, hardness, elasticity adjustable range is wider, become the latest must-haves in the architecture of the moment. In 1961, 3 m, Minnesota laid the first 200 meters polyurethane runway, but it is used for racing. Used for polyurethane runway started in 1963 and immediately to the attention of the national track and field competition, the international Olympic committee (ioc) officially acknowledged soon this "new", Mexico after the Olympic Games, plastic runway become the essential facilities for the international track and field games.
The thickness of the plastic runway about 13 cm, the structure is very like a piece of table tennis racquet ZhengJiao sponge. Runway flat blank as table tennis, a solid foundation in the middle of the plastic layer like a sponge, friction layer on the surface of the colloidal particle is equivalent to table tennis. Athletes run in such a large area of "sponge" on, can effectively reduce the shock when landing, stretching back to get jungle playground deformation potential energy feedback by the thrust, thus greatly increase the efficiency of running. Fast, smooth and uniform on the surface of the runway, but also to give full play to the standard technique that is besides sprinting, hurdling, middle-distance race, all projects associated with the approach such as the high jump, long jump, javelin result for all plastic runway and the advent of "a rising tide lifts all boats". In addition, the plastic runway regardless of winter and summer and the weather "nature do not change" all-weather advantages, wear resistant, oil resistant, resistant to radiation commendable, is pleasing to the eye sight, spirits of bright-coloured colour, athletes fell after the safety degree, is can't be matched by any other track.
Plastic runway production and laying technology continuously improve today, all plastic type, mixed type, grain type, coil type of flowers, for glory and texts, already from the stadium has been laid in the school playground.