Development of Novel Flattening Method for Bamboo Cane by the High-Pressure Steam Processing

作者：Sarula^*; Nakamura Shimpei; Yoshitani Kouzou; Tanahashi Mitsuhiko

来源：Mokuzai Gakkaishi, 2012, 58(4): 193-200.

• flattening method
• circumferential compression
• flattened bamboo board
• high-pressure steam

To expand the various kinds of utilization of bamboo, development of a novel flattening method for bamboo cane was conducted. 3-5 year-old Phyllostachys bambusoides (outer circumference : 240-275 min) canes were softened with high-pressure steam, and were pressed into a stainless-steel forming pipe (inner circumference : 220 mm) using a horizontal pressing apparatus. A linear cut was made along the fibrous direction of the compressed bamboo cane, and the specimen was softened by soaking in hot water (70-80 degrees C). The bamboo cylinder was partially opened by hand, and subsequently it was flattened by pressing using a stainless steel board newly developed for flattening bamboo. The results indicated that the best steaming condition for circumferential compression of bamboo cane was 140 degrees C for 30 mins, and the ideal compression ratio to flatten the bamboo cane was 14-19%. By circumferential compression, the outer circumference of the specimen becomes smaller than the inner circumference of untreated bamboo cane. Therefore, it can be considered that the compressed bamboo is able to accommodate the expansion of the inner wall which is required to flatten the circular product. The flattened bamboo board was successfully obtained after a fixation treatment with high-pressure steam at 180 degrees C for 4 mins.

• 出版日期2012