Classifications

• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
  • B44C1/22—Removing surface-material, e.g. by engraving, by etching
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C19/00—Surface treatment of glass, not in the form of fibres or filaments, by mechanical means
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C2218/00—Methods for coating glass
  • C03C2218/30—Aspects of methods for coating glass not covered above
  • C03C2218/34—Masking
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
  • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds

Definitions

• the present invention relates to materials that provide a different degree of screening in the two directions of sight according to the intensity of the light that illuminates the two sides thereof, and in particular to a material in which said effect is achieved through a calibrated opacification of a portion of the surface of at least one of the sides, hi the following, specific reference will be made to a glass pane to be used in a window, but it is clear that what will be said also applies to similar transparent materials (e.g. Plexiglas or other type of plastic materials) and to different applications in the fields of building and furnishing, such as doors, wardrobe doors, dividing walls, shower booths, lamps, etc.
• the term "pane” as used herein is not meant to be limited to a flat rectangular element, but also includes elements with curved surface and with any contour.
• the object of the present invention is to provide a material which is free from the above-mentioned drawbacks.
• This object is achieved by means of a transparent material worked with a calibrated opacification of a portion of the surface of at least one of the sides according to the parameters and the ranges disclosed in claim 1.
• Other advantageous features of the present material are specified in the dependent claims.
• a first great advantage of this material is that of providing a differential screening in the two directions of sight without this implying a mirror effect, thus allowing a wider choice to the user.
• a second significant advantage is that the screening effect can be achieved with a great freedom in the selection of the values of the working parameters, therefore with a wide range of aesthetic result of the material.
• Still another advantage of the present material, in the embodiments with opacification through chemical or mechanical treatment, is the greater resistance to deterioration, that does not affect the screening effect.
• Fig.l is a diagrammatic front view of a pane of material worked with a regular opacification pattern
• Figs.2, 3 and 4 are views similar to the preceding one of other panes of material, with decreasing percentage of opacified surface and different working patterns.
• a square pane Pl that has a side partially opacified according to a regular pattern that leaves transparent round regions R arranged in staggered horizontal rows. These regions R have a diameter of 1,2 mm (i.e. an area of about 1,13 mm 2 ), whereby the non- worked surface is equal to 14,1% of the area of pane Pl, that is to say that 85,9% of the pane is opacified.
• the opacified surface is depicted in black for the sake of clarity, so as to obtain a clear contrast between the worked and non- worked regions, but said surface will actually be semi-transparent.
• the light transmission factor of the opacified region will be between 75% and 90%, and this partial blocking of the light can be obtained through a chemical treatment (e.g. satin-etching), or a mechanical treatment (e.g. sandblasting) or by applying a suitable paint coating (e.g. silk screen printing).
• the light transmission factor is calculated according to the procedures described in the specification EN 410: 1998 "Glass in building - Determination of luminous and solar characteristics of glazing".
• the working of the pane does not necessarily follow a regular pattern and/or provide transparent regions of geometric shape since in the case of pane P2 there are provided "flower-shaped" transparent regions F arranged in an irregular pattern. These regions F have an area of about 2,5 mm 2 , whereby the non-worked surface is equal to about 32,5% of the area of pane P2, that is to say that 67,5% of the pane is opacified.
• FIGS. 3 and 4 show other two embodiments of panes with a grid working with transparent regions of different shape and size.
• pane P3 has square transparent regions S arranged in horizontal aligned rows, having an area of 4 mm 2 whereby the non- worked surface is equal to 36% of the area of pane P3, that is to say that 64% of the pane is opacified.
• pane P4 has round transparent regions R' arranged in horizontal aligned rows, having a diameter of 2,5 mm (i.e. an area of about 4,91 mm 2 ), whereby the non- worked surface is equal to about 44,2% of the area of pane P4, that is to say that 55,8% of the pane is opacified.
• the above-described differential screening effect is achieved by working the transparent material of the pane according to the following parameters: a) total area of the transparent regions: from 10% to 45% of the pane area; b) area of the single transparent region: from 0,5 mm 2 to 5 mm 2 ; c) light transmission factor of the opacified region: from 75% to 90%.
• the whole pane P1-P4 has a global light transmission factor, always calculated according to the above-mentioned specification, between 80% and

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Mechanical Engineering (AREA)
• Surface Treatment Of Glass (AREA)

Applications Claiming Priority (1)

Publications (1)

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• 2004
  • 2004-11-02 WO PCT/IT2004/000601 patent/WO2006048897A1/en active Application Filing
  • 2004-11-02 EP EP04799398A patent/EP1824795A1/de not_active Withdrawn

Non-Patent Citations (1)

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