| 摘要 |
<p>The parallelepiped shaped landing mat core layer is made of small pellets (granules) of soft polyurethane sponge, polyurethane compact material, recycled rubber and shredded bits of leather which are bonded with elastomer (urethane polymer or latex based). This gives the mat the necessary elasticity and a given porousness which ensures its function. The outer sheathing is made of polyvinyl chloride, with a given pattern embossed on its upper side, and a profiled rubber base is glued on the bottom side of the mat allowing it to adhere firmly to the floor. The mixture components are first blended and then poured into a mold where the granules are bound with elastomer. After it sets the core is taken out of the mold and covered with the sheath material. The sheathing can also be placed into the mold before the core mixture is poured into it and pressed into shape with the heated mold cover. This type of landing mat is adequate to the present trends in the evolution of Judo requiring so-called "fast mats". It is also important that it absorbs the fall well, attenuates the athlete's sensation of pain and reduces injuries. One of the solutions offered for fixing groups mats together is based on the use of zippers.</p> |
