To provide a soundproof body and an automotive floor silencer that can provide excellent sound insulation performance for noise at least in a mid-frequency band by utilizing a laminated structure having at least a breathable base layer and a non-breathable layer containing multiple crushed materials in a dispersed state.SOLUTION: Crushed members P each have a three-dimensionally shaped crushed body Pa formed by crushing a source material having at least a thermosetting resin layer. A breathable base layer Sa is formed by dispersively positioning a plurality of three-dimensionally shaped crushed bodies Pa within thermosetting resin binder U in a layered configuration. The breathable base layer Sa comprises at least one labyrinth-like pathway K formed between two three-dimensionally shaped crushed bodies that face each other among the plurality of three-dimensionally shaped crushed bodies Pa within the thermosetting resin binder U. The non-breathable layer Sb is laminated along the surface of the breathable base layer Sa.SELECTED DRAWING: Figure 3

    【課題】本発明は、複数の粉砕物を分散状に含有する通気性基層と非通気層とを少なくとも有する積層構造を活用して、少なくとも、中周波数帯域の騒音に対し優れた遮音性能を発揮し得る防音体及び自動車用フロアサイレンサーを提供する。【解決手段】複数の粉砕部材Pは、それぞれ、少なくとも熱硬化性樹脂層を有する原材からその粉砕により形成されてなる立体形状の粉砕体Paを有する。通気性基層Saは、複数の立体形状の粉砕体Paを熱硬化性樹脂製バインダ―U内に分散状に位置させて層状に形成されている。当該通気性基層Saは、熱硬化性樹脂製バインダ-U内において複数の立体形状の粉砕体Paのうちの互いに対向し合う両立体形状の粉砕体の間に少なくとも1つの迷路状経路Kを形成してなる。 非通気層Sbは、通気性基層Saの表面に沿い積層されている。【選択図】図3


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    Title :

    SOUNDPROOF BODY AND AUTOMOTIVE FLOOR SILENCER


    Additional title:

    防音体及び自動車用フロアサイレンサー


    Contributors:

    Publication date :

    2023-11-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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