Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1998-08-06
2000-12-05
Watkins, III, William P.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
428141, 428149, 428428, 428429, 428331, 428328, 427190, B32B 516, B05D 502
Patent
active
061564095
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to anti-fogging article having an anti-fogging film or hydrophilic film formed on the surface of a substrate such as glass, ceramic, plastic or metal, and a method for producing the same. The abovementioned anti-fogging article according to the invention is used for buildings, vehicles, optical components, industrial applications, agriculture, daily-living articles, house materials, and medical equipment. The abovementioned anti-fogging article according to the invention is suitable, for example, for window glass, mirrors, lenses, fins of air conditioner heat exchanger, biomaterials, film sheets, showcases, etc. which are excellent in durability, wear resistance, anti-fogging, or hydrophilic property, etc.
BACKGROUND OF THE INVENTION
A phenomenon where glass or another article is fogged results from that minute water drops are adhered to the surface of the abovementioned articles (or are condensed thereon), and these minute water drops diffuse light. The fogging results in a remarkable lowering of the capacity of glasses, goggles, optical components of optical lenses, spoiling the appearance of window glass for buildings and mirrors, and restricting the place of use as building materials. Furthermore, if the abovementioned fogging occurs on window glass for vehicles including automobiles, the field of sight is restricted, resulting in a serious problem in view of safety.
As a method for solving such problems, there are some methods for preventing them, one of which is a method for coating a surface-active agent to the surface of articles such as glass (for example, Japanese Patent Publication No. 47926 of 1977), another of which is a method for coating a coating agent, the main component of which is hydrophilic absorption resin, to the surface thereof (for example, Japanese laid-open patent publication No. 220428 of 1994), still another of which is a method for fixing hydrophilic particles (for example, Japanese laid-open patent publication No. 328701 of 1992), and the other of which is a method for roughing the abovementioned surface (for example, Japanese laid-open patent publication No. 91042 of 1986).
However, as regards the surface of an article having a surface-active agent coated on glass or other article surface, the sustainability of anti-fogging property is low, and only a temporary effect can be obtained. Furthermore, there is another problem which is a lowering of clear transparency due to glaring or whitening.
Furthermore, the surface of an article obtained by a method for coating a coating agent, which is mainly composed of hydrophilic/absorption resin, to the surface of the abovementioned glass or article, has still another problem, that is, the wear resistance is low, and its durability is inferior to others.
Furthermore, with a method for fixing hydrophilic particles to the abovementioned glass or the surface of other articles, the obtained surface of the article cannot have a sufficient anti-fogging property, is liable to be stained, and the sustainability of the anti-fogging effect is low. Furthermore, with a method for roughing the surface, although such articles are produced by etching with hydrofluoric acid, there is such a problem where the surface of the obtained article has less anti-fogging effect with respect to breath air or steam.
In view of the abovementioned conventional shortcomings and problems, it is therefore an object of the invention to provide an anti-fogging article which is excellent in durability, wear resistance and sustainability of the anti-fogging effect, and a method for producing the same.
The invention relates to an anti-fogging article on which a film containing metallic oxide fine particles having a grain diameter from 4 through 300 nm and having a metallic oxide as a matrix is coated, wherein dents and projections having an arithmetic mean roughness (Ra) from 1.5 through 80 nm and a mean interval (Sm) from 4 through 300 nm are formed on the abovementioned film surface.
In the invention, by coating a
REFERENCES:
patent: 5134021 (1992-07-01), Hosono et al.
patent: 5674625 (1997-10-01), Takahashi et al.
English Abstract of Japan Pub. No. 09-156959, dated Jun. 17, 1997 (See PCT Search Report).
English Abstract of Japan Pub. No. 5-16280, dated Jan. 26, 1993 (See PCT Search Report).
English Abstract of Japan Pub. No. 6-220428, dated Aug. 9, 1994.
English Abstract of Japan Pub. No. 4-328701, dated Nov. 17, 1992.
English Abstract of Japan Pub. No. 61-91042, dated May 9, 1986.
Doushita Kazuhiro
Kamitani Kazutaka
Sunada Takashi
Teranishi Toyoyuki
Nippon Sheet Glass Co. Ltd.
Watkins III William P.
LandOfFree
Non-fogging article and process for the production thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-fogging article and process for the production thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-fogging article and process for the production thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-959452