水杉基3层结构实木复合地板的制备及其导热声学性能的研究

将水杉木材用于基材制备实木复合地板并与市面常见的多层和3层结构实木复合地板的理化性能、导热及声学性能进行比较。结果表明：水杉基3层结构实木复合地板的含水率为10.7%，甲醛释放量为0.112 mg/m³，浸渍剥离指标符合国家标准要求。3种实木复合地板由于结构和树种组成不同，导热性有较大差异，水杉基3层结构实木复合地板导热系数为0.188 W/(m·K)，在3种实木复合地板中最低，保温隔热效果最好。水杉基3层结构实木复合地板在0.2～2 kHz范围内11个频率条件下的吸声系数，均高于相同频率条件下其他2种实木复合地板。密度、含水率、漆膜厚度等均对产品吸声系数有影响。

Research on Preparation of Metasequoia-based Three-layer Parquet and Its Thermal Conductivity and Acoustic Performance

Using Metasequoia glyptostroboides as base material to prepare parquet and comparing with the physical and chemical properties, thermal conductivity and acoustic properties of common multi-layer and three-layer parquet from the market. The results show that the moisture content of M. glyptostroboides based three-layered parquet is 10.7%, the formaldehyde emission is 0.112 mg/m3, and the impregnation and peeling index meets the requirements of national standards. The 3 types of parquet have different structures and tree species composition, and the thermal conductivity is quite different. The thermal conductivity of M. glyptostroboides based three-layer parquet is 0.188, which is the lowest among the 3 kinds of parquet, and its thermal insulation effect is the best. The sound absorption coefficient of M. glyptostroboides based three-layer parquet under 11 frequency conditions in the range of 0.2–2 kHz is higher than that of the other 2 kinds of parquet under the same frequency condition. Density, moisture content, paint film thickness, etc. all have an impact on the sound absorption coefficient of the parquet.