CEMENT SOUND ABSORBING MATERIAL

To provide a cement sound absorbing material having strength of the same degree as a conventional concrete panel and improved in sound absorbing characteristics.SOLUTION: A cement sound absorbing material 1 comprises surface layers 10 and 11 containing cement as the main component and cellulose nano...

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Hauptverfasser:	ARAKI KATSUHIKO, FUKUDA NAOYA, TANAKA TAISEI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BUILDING BUILDING MATERIALS CEILINGS FIXED CONSTRUCTIONS FLOORS GENERAL BUILDING CONSTRUCTIONS INSULATION OR OTHER PROTECTION OF BUILDINGS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS ROOFS STRUCTURAL ELEMENTS TRANSPORTING WALLS, e.g. PARTITIONS
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Beschreibung
Zusammenfassung:	To provide a cement sound absorbing material having strength of the same degree as a conventional concrete panel and improved in sound absorbing characteristics.SOLUTION: A cement sound absorbing material 1 comprises surface layers 10 and 11 containing cement as the main component and cellulose nanofibers, and an intermediate layer 12 containing cement as the main component and cellulose nanofibers and polyvinyl alcohol and a film-like bubble sheet 20 which is arranged so as to be laminated on an intermediate layer 12 and in which air is sealed in a large number of projection-like voids 21, and a large number of small holes 13 reaching the bubble sheet 20 from the surface layer 10 on one side are formed.SELECTED DRAWING: Figure 1 【課題】本発明では、従来とコンクリートパネルと同程度の強度を備えるとともに吸音特性を向上させたセメント製吸音材を提供することを目的とするものである。【解決手段】本発明に係るセメント製吸音材１は、セメントを主成分としセルロースナノファイバーを含む表面層１０及び１１と、セメントを主成分としセルロースナノファイバー及びポリビニルアルコールを含む中間層１２と、中間層１２に積層するように配置されるとともに多数の突起状の空隙２１に空気を密封したフィルム状の気泡シート２０とを備え、片側の表面層１０から気泡シート２０に到達する多数の小孔１３が形成されている。【選択図】図１