Title:
GAS MASK AND STORING DEVICE FOR GAS MASK
Document Type and Number:
Japanese Patent JPH09225054
Kind Code:
A
Abstract:
To preserve the long-time defogging and visibility-securing performances of a gas mask to prevent condensed water and water drops stuck to lenses from clouding or dimming by providing the inner surface of the lens part of the gas mask with a photocatalyst and by making the surface hydrophilic according to photo-excitation.
A layer containing a photocatalyst like a crystalline titanium oxide, etc., is formed on the surface of a base material on the inner surface of the lens part of a gas mask. The surface of the lens, with the surface structure like this, is made highly hydrophilic according to the photo-excitation of the photocatalyst. Thus, when the moisture in the atmosphere condenses and sticks, it uniformly forms membranous water instead of growing into a state of water drops, therefore, the water condensed from moisture and/or water drops are prevented from clouding or dimming the lenses and visibility is secured. The photocatalyst used here is a substance which is capable of generating conduction electrons and electron holes in the excitation of the electrons in the valence band when irradiated with light having a larger energy than the energy gap between the conduction band and the valance band of the crystal of the photocatalyst.
Inventors:
HAYAKAWA MAKOTO
Application Number:
JP29100796A
Publication Date:
September 02, 1997
Filing Date:
September 26, 1996
International Classes:
A01G9/14; A42B3/04; A47B67/02; A47G1/00; A47G19/00; C09K3/16; A47K1/02; A47K11/00; A47L4/00; A47L15/00; A61B18/20; A61C3/02; A61C19/00; A61L15/16; A61L27/00; A61L29/00; A62B18/02; A62B18/08; A62B25/00; A62D7/02; B01D53/86; B01D53/94; B01D53/96; B01D71/70; B01J21/06; B01J21/08; B01J23/14; B01J23/62; B01J35/02; B01J37/02; B05D1/36; B05D3/06; B05D3/10; B05D5/00; B05D5/12; B05D7/14; B05D7/24; B08B17/00; B08B17/02; B32B7/02; B32B9/00; B32B17/10; B32B18/00; B32B27/00; B32B27/18; B60B3/00; B60J1/00; B60K37/00; B60R1/06; B60R21/00; B60S1/02; B60S1/60; B60W30/00; B62J99/00; B65D81/34; C01G23/04; C01G23/047; C03C17/22; C03C17/245; C03C17/25; C03C17/30; C03C17/34; C03C17/36; C03C17/42; C03C27/12; C04B41/65; C04B41/85; C04B41/87; C08J7/00; C08J7/04; C08J7/06; C08K3/22; C08K3/36; C08L83/04; C09C3/12; C09D1/00; C09D5/00; C09D5/08; C09D5/16; C09D7/12; C09D183/00; C09D183/02; C09D183/04; C09D185/00; C09D201/00; C09D201/02; C09K3/00; C09K3/18; C11D17/00; C23C8/12; C23C14/08; C23C18/14; C23G5/00; E01D19/10; E01F9/00; E01F9/615; E01F9/619; E01F15/00; E03D11/02; E04B1/682; E04B1/92; E04C1/42; E04C2/00; E04F13/08; E04F13/14; E04F13/15; E06B7/14; E06B9/386; F21S8/10; F21V3/04; F21V15/01; F25D23/02; F28F13/04; F28F13/18; G01D11/26; G01J1/02; G01J1/04; G01J5/02; G01J5/34; G01S7/48; G01S17/93; G01V8/12; G02B1/02; G02B1/12; G02B5/08; G02B5/10; G02C7/02; G02C11/08; G03B15/00; G03B17/08; G03B17/56; G08B13/191; G08B17/12; G08G1/095; G09F7/00; G09F9/00; G09F13/04; H01B17/50; H01S3/00; H04N5/225; H04N5/65; H05F1/02; H05F3/06; E01D101/00; (IPC1-7): A62B18/08; A62B18/02; A62B25/00; A62D7/02
