发明名称 |
ULTRA-LIGHT SOUND INSULATOR |
摘要 |
The objective of the present invention is to efficiently and inexpensively mass-produce a sound insulator for a vehicle which is light in weight and has excellent sound insulating properties. For this purpose, the ultra-light sound insulator of the present invention is composed of a felt single sheet 3 having a vehicle interior side surface 1 and a vehicle exterior side surface 2 and being thermoformed of cotton fibers and binder fibers which are tangled and contacted and jointed to each other in a random manner. The ratio of the stiffness of the vehicle interior side surface 1 to that of the vehicle exterior side surface 2 is set to be in a range of 1.1 to 10. The single sheet 3 also has an area of gradually-decreasing stiffness 4 that spreads over at least one part of the area between the vehicle interior side surface 1 and the vehicle exterior side surface 2 . The area of gradually-decreasing stiffness 4 has a stiffness distribution pattern in which the stiffness decreases gradually from the vehicle interior side surface 1 toward the vehicle exterior side surface 2 with respect to the direction perpendicular to the vehicle exterior side surface 2.
|
申请公布号 |
US2007144829(A1) |
申请公布日期 |
2007.06.28 |
申请号 |
US20060609930 |
申请日期 |
2006.12.13 |
申请人 |
TOYOTA BOSHOKU KABUSHIKI KAISHA |
发明人 |
ISHIKAWA MASAKI;ISHIKAWA YOUHEI;MATSUYAMA SOHEI;MORI HIDEYUKI |
分类号 |
F02B77/13;E04B1/82 |
主分类号 |
F02B77/13 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|