Development of manufacturing technology of the thick-molded board from Sugi bark and it's utilization for heated floor base panel

为减少木材浪费，提高杉木原木成品率，研究了杉木树皮厚模压板的生产工艺。研究了利用厚树皮板作为加热地板的基本技术。以下四章对研究结果进行了总结。1)杉木树皮板的基本性能：采用小试件测试了杉木树皮板的力学性能、尺寸稳定性、VOC吸附能力、导热性、隔音性能等基本板性能。杉木树皮板强度低，但具有良好的保温和VOC吸附能力。2)压花模具设计及厚板成型制作：设计了加热管压花模具。模具连接到蒸汽注塑机的上压板上，使用异氰酸酯树脂以400 kg/m^3的板密度制造2000 x 1 000mm的树皮模压板。厚板（45mm）可以在4.5分钟的短时间内制造出来。3)加热地板管道样式和方法的确定：使用树皮板衬垫和几种地板材料构建了小型加热地板模型。结果表明，该材料具有良好的热扩散效果，地板表面的热分布均匀。4)加热地板的应用：杉木树皮板加热地板在样板房中进行了测试。面板安装方便，灵活性高。

To reduce wood waste and improve the yield of Sugi logs, the manufacturing technology of thick molded boards from Sugi barks was investigated. The fundamental technology for the utilization of thick bark boards as heated floor panels was also investigated. The results are summarized in the following four chapters.1) Fundamental properties of Sugi bark boards: The basic board properties such as mechanical properties, dimensional stability, VOC adsorption capacity, thermal conductivity, and sound insulation performance were tested using small specimens. Sugi bark boards have low strength but have good thermal insulation and VOC adsorption capacities.2) Design of embossed die and manufacture of thick, molded boards: A die with embossed pattern for heating pipes was designed. The die was attached to the upper platen of a steam injection press and 2000 x 1 000mm molded bark boards were manufactured using isocyanate resin at board density of 400 kg/m^3. Thick (45mm) boards could be manufactured at short press time of 4.5 min.3) Determination of pattern and methods of piping for heated floors: A small scale heated floor model was constructed using bark board underlayments and several types of floor materials. The materials were found to be effective for heat diffusion and heat distribution at the floor surface was uniform.4) Application of the heated floor panels: Heated floor panels from Sugi bark boards were tested in a model house. The panels can be installed easily and have high flexibility.