| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a precision electrical and electronic apparatus capable of preventing dew condensation by arranging moisture adjustment sheets in the case body of the precision electrical and electronic apparatus, which is excellent in reversibility and responsiveness of moisture absorption and desorption characteristics, thereby quickly absorbing moisture when humidity is high in a circumferential environment and quickly desorbing the absorbed moisture when the humidity is low in the circumferential environment, and capable of effectively preventing problems such as the deterioration of a precision electrical and electronic member or the short-circuiting of an electric circuit, etc., due to dew condensation. <P>SOLUTION: The moisture adjustment sheets 10, 10A are arranged in the case body, where moisture adjustment particles for reversibly absorbing and desorbing vapor are molded in a sheet shape by mutual adhesion with thermoplastic resin powder bodies, and which include a moisture adjustment layer with a porosity of not less than 15%. Since the rate of pores formed among the moisture adjustment particles is large, the pores are utilized as water retention spaces for moisture absorption and desorption. Besides, the moisture absorption and desorption ability of the moisture adjustment particles itself and that of pores among the moisture adjustment particles are used as an aid. Consequently, dew condensation in the case body is prevented with high reversible moisture absorption and desorption performance and excellent moisture absorption and desorption responsiveness. <P>COPYRIGHT: (C)2008,JPO&INPIT |
