Mazda Motor Corporation

Gp Daikyo Corporation

Daikyonishikawa Corporation

Chie Fukuhara

Takahiro Tochioka

Yoshihiro Takemoto

Takanobu Kamura

Mitsuharu Kaneko

Issei Harima

Fumiya Mouri

Tsuyoshi Sugihara

Eiji Murasawa

Naoko Yorozu

Shinya Nakamura

Disclosed is a sound-absorbing material, which has a flow resistivity R of 3.3&#xd7;10N&#xb7;s/mor more, a Young's modulus E of 1.2&#xd7;10to 2.0&#xd7;10N/m, and a loss factor &#x3b4; of 0.12 or less. The sound-absorbing material of the present invention can enhance a sound absorption capability in a wide range of a low/intermediate-frequency region to a high-frequency region at a higher level as compared with conventional sound-absorbing materials.

Sound-absorbing material, production method for sound-absorbing material, and sound-absorbing structure

The resin-made floor panel structure including a trunk floor Fmade of resin integrally forming a spare tire storage space S, and a trunk board Bmade of resin disposed so as to cover the floor panel, fitting parts Sw, Bkfor achieving the closure of the spare tire storage space are integrally formed respectively in the trunk floor and trunk board. Thereby, in using resin materials for a floor panel, transmission of noise in the floor section to the compartment side can be suppressed by a relatively simple structure without increasing the weight.

Resin-made floor panel structure

The resin-made floor panel structure including a trunk floor F made of resin, and a trunk board B made of resin disposed so as to cover the trunk floor, a foamed layer having foams exposed at least in part is provided only on the side of the trunk board facing the floor panel. Thereby, in using resin materials for a floor panel, transmission of noise in the floor to the compartment side can be suppressed by a relatively simple structure without increasing the weight.

Growing community of inventors

Aki-gun, Japan

Chie Fukuhara