Humidity sensor

Abstract

Abstract PURPOSE:To elevate the sensitivity of a humidity sensor by adding a deliquescent salt to the mixture of an organic fiber adapted to swell by moisture absorption and a conductive fiber after they are mixed and manufactured into a paper to form a moisture sensing section. CONSTITUTION:A cellulose fiber 1a as an organic fiber adapted to swell by moisture absorption and a carbon fiber 1b as conductive fiber are mixed and manufactured into a paper which is impregnated with lithium chloride 1c as deliquescent salt to form a moisture sensing section 1. The cellulose fiber 1a is almost the same as the normally used for material of paper with the beating level of SR35 in terms of freeness. The carbon fiber 1b shall be 5mm. in the length and 35% in the ratio thereof 1b to paper and the moisture sensing section 35-40gr/m<2> in the weight per unit area. The weight of the lithium chloride impregnated in the cellulose fiber 1a shall be 6-18% considering the sensitivity and the impregnation rate of an adhesive 1d (the mixture of polyvinyl butyral and phthalic acid-n-butyl) shall be 6-15% to be added to compensate for joining force of fibril of the cellulose fiber 1a.

Inventors

• 👤 Akira Fukami
• 👤 深見　彰
• 👤 Hiroki Noguchi
• 👤 野口　浩樹
• 👤 Kunio Okamoto
• 👤 邦夫 岡本
• 👤 Yasumasa Matsuzaki
• 👤 松崎　耕正

Bibliographic Details