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公开(公告)号：JPH11183728A
公开(公告)日：1999-07-09
申请号：JP35093997
申请日：1997-12-19
Applicant: HOYA CORP
Inventor： NISHII YOSHIKAZU , TSUKADA SHOGO , OGAWA SHINICHI , HIGASHIDA MASAYUKI , TOMA YOJI , ARAI SOJI , WATANABE ITARU
Abstract: PROBLEM TO BE SOLVED: To obtain a gas treatment apparatus and gas treatment filter which are capable of efficiently developing a photocatalytic reaction and are small in size and high in treatment capacity. SOLUTION: The gas treatment unit 1 has a multiplicity of photocatalytic fibers 3 held between metallic filters 2 as air permeable members in a bundled state. Photocatalytic fiber 3 is formed by depositing a photocatelyst having the refractive index higher than the refractive index of a fiber-like guide body having projections on the surface of the light guide body. The gas to be treated flows through the gaps of the many photocatalyst fibers 3 bundled between the metallic filters 2. On the other hand, the UV rays from a UV light 6 are cast to the end faces of the photocatalystic fibers 3 and leaks out to the photocatalyst on the surface of the light guide bodies while propagating in the photocatalytic fibers 3. At this time, the malodorous components, etc., included in the gas are brought into contact with the photocatalyst excited by the UV rays and are decomposed by the photocatalytic reaction.
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公开(公告)号：JP2001064038A
公开(公告)日：2001-03-13
申请号：JP24293699
申请日：1999-08-30
Applicant: HOYA CORP
Inventor： NISHII YOSHIKAZU , ARAI SOJI
Abstract: PROBLEM TO BE SOLVED: To obtain a glass material suitable as a carrier of a photocatalyst or the like, hardly being colored and having high ultraviolet ray transmissivity and to produce a glass fiber. SOLUTION: This glass material contains 35-60 wt.% SiO2, 4-30 wt.% Al203, 4-25 wt.% B2O3, 4-40 wt.% CaO, 0-10 wt.% oxide of an alkali metal and below 50 ppm by weight iron content in terms of Fe. The glass fiber is obtained by spinning this glass material in a spinning furnace.
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公开(公告)号：JP2001009292A
公开(公告)日：2001-01-16
申请号：JP18674099
申请日：1999-06-30
Applicant: HOYA CORP
Inventor： NISHII YOSHIKAZU , HAMA JUNPEI , ARAI SOJI
Abstract: PROBLEM TO BE SOLVED: To decrease the pressure drop in a filter even when enough effective filter length is maintained, to increase the use efficiency of photocatalyst fibers and to improve the filtration ability. SOLUTION: This filter is produced by bundling light-leaking type photocatalyst fibers 10 so as to form a filter structure having a great number of fine vacancies connecting in the longitudinal direction of the photocatalyst fibers. Light is introduced into the photocatalyst fibers which form the filter structure, while a fluid to be treated is introduced through the end face of the filter structure to pass through among the photocatalyst fibers in the longitudinal direction of the fibers.
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公开(公告)号：JP2000103625A
公开(公告)日：2000-04-11
申请号：JP21734499
申请日：1999-07-30
Applicant: HOYA CORP
Inventor： ARAI SOJI , NISHII YOSHIKAZU
IPC: C03B5/225 , C03B5/43 , C03B37/02 , C03C3/062 , C03C3/064 , C03C3/066 , C03C3/068 , C03C3/072 , C03C3/074 , C03C3/085 , C03C3/087 , C03C3/091 , C03C3/093 , C03C3/095 , C03C3/097 , C03C3/105 , C03C3/108 , C03C13/00
Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a glass material whose outer light transmittance in the UV light region is improved by preventing coloration and whose inner light transmittance in the UV light region is improved by eliminating bubbles, and to provide a method for producing glass fibers. SOLUTION: This method for producing a glass material comprises (A) a process for melting a raw material mixture in a glassy state, (B) a process for clarifying and homogenizing the glassy melted product obtained in the process A in a crucible not containing platinum and subsequently molding the melted product, and (C) a process for cooling the molded product into the glass mass. The method for producing the glass fibers comprises spinning the glass material obtained by the above method in a spinning oven.
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