ARTIFICIAL SKI SLOPE, SKI JUMP, AND STADIUM FOR SNOWBOARD

摘要

PROBLEM TO BE SOLVED: To improve the function by forming a slope of a base and an artificial lawn made of the prescribed resin foamed body. ;SOLUTION: An artificial ski slope G is formed by adhering an inclined structural base 1 in which polystyrene foamed bodies 2 which are blocks of thermoplastic resin are joined with each other to an artificial lawn 3 lined with a thermoplastic resin foamed body sheet 4. The foamed body 2 is 5-0.2 kg/cm² in compression hardness in accordance with JIS K-6267, 8-40 kg/m³ in density in accordance with JIS K-7222, 0.2-3.5 kgf/cm² in compression strength at 5% compression strain in accordance with JIS K-7220, and 25-55% in repulsive elasticity in accordance with ASTM D-1564. The expansion ratio is 20-90 times. The sheet 4 is 0.25-3 kg/cm² in compression hardness in accordance with JIS K-6267, and 10-60 in expansion ratio. The lawn 3 is formed of ethylene-α-olefin copolymer containing α-olefin of ≥4 in carbon number, and 110-130°C in melting point, and 1-5 μm in grain size, and the ski slope G is 18-38% in repulsive elasticity. The cushioning property, the wear resistance, the safety, and the durability can be improved thereby.;COPYRIGHT: (C)1999,JPO