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




田中 孝国1*,松本 将弥1,小林 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)


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



Daisuke KAWAGOE1Yoshinori 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