| 摘要 |
PURPOSE:To attain the improvement or durability and touch, positive development in a wide temperature range, the prevention of damage caused by a ruptured part, the improvement of productivity, and the like by forming a storage cover of the injection molded body of thermoplastic elastomer formed of specific components and that with specific hardness. CONSTITUTION:In a storage cover 1, the part to be ruptured 3 of a top face 2 is ruptured by the expansion of an air bag enclosed in internal space 8, and two doors 2a, 2b are developed around hinge parts 4 as axes. The cover body is formed of the injection molded body of thermoplastic elastomer formed of the following components and that with JIS K6301A type hardness to be within a range of 60-85. That is, the thermoplastic elastomer is formed of 30-55 weight parts of hydrogenerated ethylene conjugate dien block copolymer with the content of stylene unit to be 20-40wt.% and the number average molecular weight to be more than 100,000, 25-50 weight parts of rubber plasticizer, 1.5-30 weight parts of olefinic resin and 5 weight parts or less of additive, and the sum of the respective elements excluding the additive is set to be 100 weight parts. |
