J. Technology and Education, Vol.25, No.1, pp.17-22 (2018)

研究論文

異なる温度条件下におけるかんぴょう錠剤の吸湿性能の比較

 

田中 孝国¹*，松本 将弥¹，小林 稜¹，大岡 久子²，川越 大輔¹，高原 美規³

¹小山工業高等専門学校　物質工学科 (〒323-0806 小山市中久喜771)

*tanakatakakuni@oyama-ct.ac.jp

²群馬工業高等専門学校　物質工学科 (〒371-8530 群馬県前橋市鳥羽町 580)

³長岡技術科学大学 生物機能工学専攻 (〒940-2188 新潟県長岡市上富岡町1603-1)

 

Performance comparison of kanpyo tablets under different temperature conditions

 

Takakuni TANAKA¹，Masaya MATSUMOTO¹，Ryo KOBAYASHI¹，Hisako OOKA²，

Daisuke KAWAGOE¹，Yoshinori TAKAHARA³

 

¹National Institute of Technology, Oyama College

(771 Nakakuki, Oyama City, Tochigi Prefecture 323-0806, JAPAN)

²National Institute of Technology, Gunma College

(580 Toriba, Maebashi, Gunma 371-8530, JAPAN)

³Nagaoka University of Technology, Department of Bioengineering

(1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, JAPAN)

 

(Received April 13, 2018; Accepted May 14, 2018)

 

Kanpyo, a type of gourd, is a specialty product of Tochigi Prefecture. It is mainly sold in a dried and string-like form that is shaved into thin pieces and dehydrated. Kanpyo is rich in fiber and contains about 95% water. We found out these properties and carried out elemental preparation to produce a new desiccant tablet. In a previous study conducted, kanpyo desiccant tablets showed a water absorption capability of 50-60 wt%. First, dried shavings of kanpyo were made into a powder form using a mill crusher. The water absorption of the powder was confirmed in a sealed container at 25℃. Next, the powder was pressed with a pressing machine at a rate of 3 tons in 5 minutes. Also, the water absorption efficiency of the tablet was confirmed under different humidity and temperature. The results showed that a tablet with a relative humidity that is higher than 40% can absorb water for up to 300 hours. The equilibrium moisture content is shown based on the amount of water absorbed after 300 hours at 25℃.

Key words: dried gourd / humidity control / water absorption