JP2011157241A - Laminated glass for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a laminated glass for automobiles capable of maintaining preferable radio transparency and shielding solar radiant energy at the same time. <P>SOLUTION: The laminated glass for automobiles having a transparent colored band comprises a ceramic color layer formed in a peripheral edge portion of the laminated glass for automobiles, the transparent colored band formed at an upper side portion, and a heat reflecting layer formed in at least a central portion. When viewed in a direction perpendicular to the glass surface, at least the upper end of the heat reflecting layer overlaps with the transparent colored band. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a laminated glass for automobiles, and more particularly to a laminated glass for automobiles used for a front window having a heat ray reflecting function.

  Conventionally, there is a tendency to reduce the influence of infrared rays as much as possible from the viewpoint of energy saving represented by reduction of cooling load. Due to this tendency, in recent years, in the laminated glass for automobiles, the solar radiation energy (hereinafter sometimes referred to as solar radiation) that enters the car is shielded, the temperature rise in the car is suppressed, and the heat ray is used to reduce the cooling load. A heat ray reflective layer using a reflective film, film, particle or the like is employed.

  In general, laminated glass is obtained by press-bonding two glass plates with an intermediate film. In laminated glass for automobiles, the above laminated glass is applied to the above laminated glass for the purpose of imparting suitable visible light permeability, heat insulation, and the like. Those provided with various films, thin films, layers and the like are widely known (Patent Document 1, Patent Document 2). However, on the other hand, the heat ray reflective layer needs to be installed so as not to come into contact with air from the viewpoint of durability. For this reason, generally, the heat ray reflective layer is located inside the glass edge of the laminated glass for automobiles. The method of providing the edge part of this is used.

  In addition, since the heat ray reflective layer reflects light, electromagnetic waves, etc. in a wide wavelength range, radio wave interference is likely to occur, such as communication using a mobile phone or reducing the gain of a glass antenna provided on an automobile window glass. There was a problem. Under such circumstances, currently, a method for obtaining suitable radio wave permeability by removing a part of the heat ray reflective layer is being studied (Patent Document 3).

Japanese Patent Laid-Open No. 10-297945 JP-A-7-94263 JP-A-7-242441

  As described above, in order to obtain suitable radio wave transmission, it is preferable to increase the area from which the heat ray reflective layer is removed. However, on the other hand, if the area for removing the heat ray reflective layer is large, the purpose of shielding the solar radiation energy inherent to the heat ray reflective layer is not achieved, and in the laminated glass for automobiles, the end of the heat ray reflective layer is linear. There was a problem that it may be visually recognized and the appearance is poor.

  An object of the present invention is to obtain a laminated glass for automobiles capable of simultaneously achieving suitable radio wave permeability maintenance and shielding of solar radiation energy.

  That is, the present invention is a laminated glass for automobiles having a transparent colored band, and has a ceramic color layer on the peripheral part of the laminated glass for automobiles, a transparent colored band on the upper side part, and a heat ray reflective layer at least in the center part, When viewed from a direction perpendicular to the glass surface, at least an upper end of the heat ray reflective layer overlaps with the transparent colored band.

  Here, the “upper side portion” refers to a position above the center line in the horizontal direction of the glass surface of the laminated glass for automobiles.

  The transparent colored band is one in which a colored region (colored band) is formed on the upper side of a laminated glass for automobiles in order to prevent glare from sunlight incident from above (hereinafter sometimes referred to as a shade band). In addition, the transparent colored band has a surface that does not overlap the ceramic color layer when the laminated glass for automobiles is viewed from a direction perpendicular to the glass surface, and suppresses the transmission of solar radiation. This has the effect of suppressing the temperature rise in the vehicle and reducing the cooling load.

  When the heat ray reflective layer is removed, the removed part is insufficiently reflected by infrared rays, and the solar radiation is not sufficiently shielded. However, by removing the part of the heat ray reflective layer overlapping the transparent colored band, the solar radiation is transmitted. Therefore, it is possible to acquire radio wave transmission without greatly reducing the shielding performance. Therefore, the solar radiation transmittance (hereinafter sometimes referred to as Ts) is preferably 50% or less.

  The ceramic color layer is formed by baking a paste made of a ceramic color composition (hereinafter sometimes referred to as a ceramic color paste) on the periphery of an automotive glass screen by screen printing, followed by baking in a bending process. It is.

  The ceramic color layer is an opaque colored layer, which prevents light incident on the vehicle and transmitted light, for example, preventing deterioration of adhesives such as urethane sealant due to ultraviolet rays, or hiding terminals for heat rays from the outside. It has a function. Therefore, it is important that the ceramic color layer does not transmit visible light, particularly ultraviolet rays, and it is preferable that the visible light transmittance is 0.3% or less and the ultraviolet transmittance is 0.1% or less.

  The heat ray reflective layer is a layer having a function of reflecting infrared rays, and laminated glass for automobiles by sandwiching an infrared reflection film having an infrared reflection function, or forming a film having an infrared reflection function on glass or an intermediate film. Is provided.

  The heat ray reflective layer is formed at the center of the glass surface of the automotive glass, and it is desirable to increase the area to be formed in order to obtain suitable heat ray reflection performance. Further, when viewed from the direction perpendicular to the glass surface, the upper end of the heat ray reflective layer appears to overlap the transparent colored band, and may partially overlap the ceramic color layer.

  Moreover, when the laminated glass for automobiles of the present invention is viewed from the direction perpendicular to the glass surface, the end portion of the heat ray reflective layer that does not overlap the transparent colored band is mainly formed with the ceramic color layer. It overlaps with a peripheral part, It is characterized by the above-mentioned.

  Moreover, when the laminated glass for automobiles of the present invention is viewed from the direction perpendicular to the glass surface, the end portion of the heat ray reflective layer that does not overlap with the transparent colored band mainly overlaps with a peripheral portion that is not colored. It is characterized by that.

  The laminated glass for automobiles of the present invention has a colored pattern layer on the inner peripheral side of the ceramic color layer, and the colored pattern layer is in contact with the ceramic color layer when viewed from a direction perpendicular to the glass surface. It is characterized by that.

  In order to prevent the color of the ceramic color layer from becoming too conspicuous between the car glass color and the body color, the colored pattern layer uses a fine dot pattern, gradation pattern, etc. to give a visual discomfort. It is to ease. Accordingly, the portion that appears to be in contact with the ceramic color layer is colored to the same extent as the ceramic color layer, and the colored area decreases as it approaches the center.

  The laminated glass for automobiles of the present invention can achieve suitable radio wave transmission maintenance and solar radiation energy shielding at the same time. Further, it is possible to make the end portion inconspicuous by overlapping the end portion of the heat ray reflective layer on the shade band portion.

It is the schematic when one Embodiment of the laminated glass for motor vehicles which concerns on this invention is visually observed from the vehicle outer side. It is the schematic when one Embodiment of the laminated glass for motor vehicles which concerns on this invention is visually observed from the vehicle outer side. It is the schematic when one Embodiment of the laminated glass for motor vehicles which concerns on this invention is visually observed from the vehicle outer side. It is the schematic when one Embodiment of the laminated glass for motor vehicles which concerns on this invention is visually observed from the vehicle outer side.

  The transparent colored band in the laminated glass for automobiles according to the present invention may be formed on a glass surface or an intermediate film, and sandwiches and presses a resin film in which a transparent colored band is formed in the laminated glass. However, it is preferable to use a resin film in which a transparent colored band is formed as an intermediate film.

  In addition, in the case of laminated glass for automobiles used especially as a front window, in order to install a lane-keeping camera or a rain sensor detector that detects raindrops, etc. May be removed.

  The transparent colored band preferably has a visible light transmittance of 10% or less for anti-glare of sunlight incident from above. Various colors can be selected for the transparent coloring band, and blue, green, brown, gray and the like are preferably used.

  Moreover, the width | variety of the said transparent coloring belt | band | zone should just be a grade which has a lower end above the laminated glass for motor vehicles, and does not reduce a driver | operator's visibility, for example, is good also as 50 mm or more and 300 mm or less. Furthermore, a layer having a gradation effect may be formed from the lower end of the transparent colored strip toward the center line in the horizontal direction of the glass surface of the laminated glass for automobiles in order to improve the aesthetic appearance.

  The ceramic color layer of the present invention is formed on glass, and is particularly preferably formed on the vehicle inner surface side of the vehicle interior glass.

  The ceramic color layer is formed of a ceramic color paste containing a colored pigment and a low melting point glass frit. Examples of the colored pigment include chromium oxide, copper oxide, manganese oxide, cobalt oxide, and titanium oxide. Etc., and may be used alone or as a mixture of a plurality of types. Although it does not specifically limit as a low melting glass frit, Amorphous, crystalline, lead-free, leaded glass, etc. can be used. Various colors are selected as the color of the ceramic color layer, and black is particularly preferably used.

  Even if the heat ray reflective layer of the present invention is formed on the glass surface or the intermediate film surface, a film having a heat ray reflective function is sandwiched between the glass and the intermediate film or between the intermediate film and the intermediate film. You may do it. When the heat ray reflective layer is formed on the glass surface, it is preferable that the heat ray reflective layer is formed on the surface on the side of sandwiching the intermediate film of laminated glass from the viewpoint of durability.

  Further, the heat ray reflective layer only needs to have suitable infrared reflectivity and visible light transmittance, and as a main component for reflecting infrared rays, Ag, Zn, Ti, Sn, Cr, Nb, Ta, Al, In , ITO, ATO, AZO, GZO, IZO and the like. These components may be used as a metal film or a transparent conductive film, or may be contained as particles in a film or resin. Further, a laminated film in which a metal film or a transparent conductive film using the above components as a main component and a dielectric film or the like may be used. Alternatively, the heat ray reflective layer may be an optical interference film in which a plurality of dielectric films are laminated.

  When forming the heat ray reflective layer on a glass surface or a resin surface, if the glass or resin as a base material is not deteriorated, a mask member is set in advance before forming the layer, and a heat ray reflective layer having a desired shape is obtained. Alternatively, a desired shape may be obtained by removing the formed heat ray reflective layer by etching with a grindstone, a laser, a chemical agent, or the like after formation.

  Moreover, when using resin in which the component which reflects infrared rays contains in a film, an intermediate film, etc., after cut | disconnecting this resin to a desired shape, what is necessary is just to crimp | bond as a member of a laminated glass.

  The laminated glass for automobiles of the present invention is formed by heating and bending into a desired shape according to the type of automobile to be employed. In the production process of laminated glass for automobiles, the step of forming the ceramic color layer on the glass and the step of cutting and polishing the glass into a desired shape are preferably performed before the step of heat bending. Moreover, since the formation method of the heat ray reflective layer and the transparent colored strip is various as described above, it is only necessary to appropriately select which step in the manufacturing process of the laminated glass for automobiles is to be performed.

  The heat ray reflective layer is formed in a central portion including at least the center of the glass surface when viewed from the direction perpendicular to the glass surface, and the upper end thereof seems to overlap the transparent colored band. Is. 1 to 4 show schematic views of an embodiment when viewed from the outside of the vehicle in a direction perpendicular to the glass surface. Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. The form will be described. The present invention is not limited to the following.

  First, a strip-shaped ceramic color layer 3 having a width of about 30 mm to about 100 mm is formed on a flat glass having a length of about 1000 mm, a width of about 1500 mm, and a thickness of 2.0 mm.

  The ceramic color paste is applied to a desired shape by screen printing, dried at 120 ° C. for 5 minutes in a drying furnace, and then baked in a baking furnace for 3 minutes. At this time, the ceramic color paste is used in which the ratio of the low melting glass frit and the pigment is adjusted to low melting glass frit: pigment = 80: 20 and the resin content is 5 wt% and the solvent is 15 wt% to 100 wt%. As the pigment, a mixed pigment of chromium oxide, copper oxide and manganese oxide is used as a black pigment. The mixing ratio of the low melting point glass frit and the pigment, the kind of the pigment, etc. may be appropriately selected according to the purpose.

Next, a mask member is placed on the glass surface on which the heat ray reflective layer 4 is not formed, placed on a substrate holder of a magnetron sputtering apparatus, and the inside of the vacuum chamber of the apparatus is removed to about 5 × 10 ⁻⁴ Pa with a vacuum pump. After the gas is introduced, a sputtering gas is introduced, the pressure in the vacuum chamber is maintained between 0.1 and 1 Pa, power is applied to the sputtering target, and the glass substrate with the patterning film is conveyed, while the Ag film and dielectric A heat ray reflective laminated film composed of a body film is formed on the entire surface. The heat ray reflective layer 4 is formed by removing the mask member after the film formation.

  Next, the plate-like glass on which the ceramic color layer 3 and the heat ray reflective layer 4 are formed is cut and polished into a desired shape, and the plate-like glass cut and polished into a predetermined shape prepared separately is stacked to form a glass bending die. Install and heat-bend form.

Next, the PVB on which the transparent colored band 2 is formed is inserted between the two glasses described above to form a laminate, the laminate is placed in a rubber vacuum bag, the inside of the bag is deaerated and decompressed, After holding at about 80 to 110 ° C. for about 20 to 30 minutes, once brought to room temperature, the laminate taken out from the bag is put into an autoclave apparatus, and the pressure is about 10 to 14 kg / cm ² and the temperature is about 110 to 140 ° C. for about 20 Press and heat for ~ 40 minutes to obtain laminated glass for automobiles.

  In the embodiment of FIG. 1, the end portion 5 of the heat ray reflective layer 4 has a transparent colored band 2 and a ceramic color layer 3 whose upper ends are formed above the horizontal center line 1, and end portions other than the upper ends. The ceramic color layer 3 appears to overlap each other.

  The transparent colored band 2 is preferably formed so that the upper edge of the glass and the lower end of the transparent colored band 2 are parallel from the viewpoint of aesthetics and function, and the transparent colored band 2 is partially ceramic. The color layer 3 may overlap.

  2 and 3, the end 5 of the heat ray reflective layer 4 is colored at the upper end of the transparent colored band 2, the peripheral edge not colored at the lower end, and the end other than the upper and lower ends. It appears to overlap with the peripheral portion and the transparent colored band 2 that are not formed.

  The non-colored peripheral portion may refer to a glass surface portion that appears to be adjacent to the ceramic color layer 3 or the colored pattern layer 6 when viewed from a direction perpendicular to the glass surface. This is a portion not including the layer 3 and the colored pattern layer 6.

  Further, as in the embodiment shown in FIG. 4, a part of the end portion 5 of the heat ray reflective layer 4 may inevitably cross the colored pattern layer 6 due to its structure.

DESCRIPTION OF SYMBOLS 1 Horizontal center line 2 Transparent coloring zone 3 Ceramic color layer 4 Heat ray reflective layer 5 End part of heat ray reflective layer 6 Colored pattern layer

Claims (5)

In the laminated glass for automobiles having a transparent colored band, the laminated glass for automobiles has a ceramic color layer at the peripheral part, a transparent colored band at the upper side part, and a heat ray reflective layer at least at the center part, and with respect to the glass surface A laminated glass for automobiles, wherein at least an upper end of the heat ray reflective layer overlaps with the transparent colored band when viewed from the vertical direction. When viewed from a direction perpendicular to the glass surface, an end portion of the heat ray reflective layer that does not overlap with the transparent colored band mainly overlaps with a peripheral edge portion on which the ceramic color layer is formed. The laminated glass for automobiles according to 1. The edge part of the said heat ray reflective layer which does not overlap with the said transparent coloring belt | band | zone when it sees from a perpendicular | vertical direction with respect to a glass surface overlaps with the peripheral part which is not mainly colored. Laminated glass for automobiles. The color pattern layer is provided on the inner peripheral side of the ceramic color layer, and the color pattern layer is in contact with the ceramic color layer when viewed from a direction perpendicular to the glass surface. The laminated glass for automobiles according to any one of 3 above. The laminated glass for automobiles according to any one of claims 1 to 4, wherein the solar radiation transmittance of the heat ray reflective layer is 50% or less.

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