JP2016179548A - Glass resin transparent laminate for window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass resin transparent laminate for window which enables insides of a machine tool, a clean bench, a glove box and the like to be visually recognized without reflection of external light such as a fluorescent lamp, while keeping scratch resistance.SOLUTION: A glass resin transparent laminate 1 for window has: a transparent resin layer 2; a first glass layer 3 provided on the transparent resin layer 2; a second glass layer 4 provided on the surface in an opposite side to the first glass layer 3 of the transparent resin layer 2; a first transparent adhesive layer 5 which is arranged between the transparent resin layer 2 and the first glass layer 3, and bonds the transparent resin layer 2 and the first glass layer 3; a second transparent adhesive layer 6 which is arranged between the transparent resin layer 2 and the second glass layer 4, and bonds the transparent resin layer 2 and the second glass layer 4; a first antireflection layer 7 which is provided on the surface in an opposite side to the transparent resin layer 2 of the first glass layer 3; and a second antireflection layer 8 which is provided on the surface in an opposite side to the transparent resin layer 2 of the second glass layer 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a glass resin transparent laminate for windows that requires scratch resistance and visibility, typified by a viewing window for machine tools, a viewing window for experimental equipment such as a clean bench and a glove box.

  Transparent resin bodies made of polycarbonate or acrylic resin are lightweight, excellent in transparency, and have impact resistance, so they are used for window materials that require particularly high impact resistance such as viewing windows for machine tools. Yes. However, when used for a viewing window or the like of a machine tool, the transparent resin body is inferior in scratch resistance as compared with glass, and therefore has a drawback that it is easily damaged by cutting chips scattered during operation of the machine tool. For these reasons, in recent years, there has been proposed a laminated board in which a glass plate having excellent scratch resistance is bonded to a transparent resin body.

  As a laminated plate in which a glass plate is bonded to a transparent resin body, for example, a glass plate is bonded to the surface of a polycarbonate resin plate provided with a silicone hard coat layer via a bonding layer made of a polyurethane resin. Has been proposed (see Patent Document 1).

JP 2001-205742 A

  However, when the laminated plate described in Patent Document 1 is used as a viewing window for machine tools, a viewing window for experimental equipment such as a clean bench or a glove box, the surface of the laminated plate constituting the viewing window can be exposed to a fluorescent lamp or the like. There is a reflection of light, and there is a problem that it becomes difficult to visually recognize the inside of a machine tool, a clean bench, a glove box, and the like.

  The present invention provides a glass resin transparent laminate for a window that can be visually recognized without reflection by external light such as a fluorescent lamp while maintaining impact resistance and scratch resistance without being reflected by external light such as a fluorescent lamp. The main purpose is to do.

  The glass resin transparent laminate for windows of the present invention comprises a transparent resin layer, a first glass layer provided on the transparent resin layer, and a side opposite to the first glass layer of the transparent resin layer. A second glass layer provided on the surface, and disposed between the transparent resin layer and the first glass layer, wherein the transparent resin layer and the first glass layer are bonded to each other. A first transparent adhesive layer, a second transparent adhesive layer that is disposed between the transparent resin layer and the second glass layer, and bonds the transparent resin layer and the second glass layer; A first antireflection layer provided on a surface of the first glass layer opposite to the transparent resin layer; and a surface of the second glass layer opposite to the transparent resin layer. And a second antireflection layer provided on the substrate.

  In the glass resin transparent laminate for windows of the present invention, the thickness of the first glass layer and / or the second glass layer is preferably 300 μm or less.

  In the glass resin transparent laminate for windows of the present invention, the transparent resin layer is preferably larger than the total thickness of the first glass layer and the second glass layer.

  In the glass resin transparent laminate for windows of the present invention, the total thickness of the first glass layer and the second glass layer is preferably 0.1 times or less the thickness of the transparent resin layer.

  In the glass resin transparent laminate for windows of the present invention, the first glass layer and / or the second glass layer is preferably alkali-free glass.

  In the glass resin transparent laminate for windows of the present invention, the first antireflection layer and / or the second antireflection layer includes a low refractive index layer having a relatively low refractive index and a relatively high refractive index. It is preferable that high refractive index layers having a refractive index are alternately laminated.

  The glass resin transparent laminate for windows of the present invention preferably further comprises a first water repellent layer provided on the surface of the first antireflection layer opposite to the first glass layer. .

  In the glass resin transparent laminate for windows of the present invention, the first water repellent layer preferably contains fluorine.

  The glass resin transparent laminate for windows of the present invention preferably further comprises a second water-repellent layer provided on the surface of the second antireflection layer opposite to the second glass layer. .

  In the glass resin transparent laminate for windows of the present invention, it is preferable that the second water repellent layer contains fluorine.

  The glass resin transparent laminate for windows of the present invention preferably further comprises a hydrophilic layer provided on the surface of the second antireflection layer opposite to the second glass layer.

  It is preferable that the glass resin transparent laminated body for windows of this invention is used for the inspection window of a machine tool.

  According to the present invention, there is provided a glass resin transparent laminate for a window which can be visually recognized without reflection by external light such as a fluorescent lamp, while maintaining scratch resistance, while the inside of a machine tool, a clean bench, a glove box or the like is not reflected by external light such as a fluorescent lamp. Can do.

It is a typical sectional view of the glass resin transparent layered product for windows concerning one embodiment of the present invention. It is typical sectional drawing of the glass resin transparent laminated body for windows which concerns on another embodiment of this invention. It is typical sectional drawing of the glass resin transparent laminated body for windows which concerns on another embodiment of this invention.

  Hereinafter, an example of the preferable form which implemented this invention is demonstrated. However, the following embodiment is merely an example. The present invention is not limited to the following embodiments.

  Moreover, in each drawing referred in embodiment etc., the member which has a substantially the same function shall be referred with the same code | symbol. The drawings referred to in the embodiments and the like are schematically described, and the ratio of the dimensions of the objects drawn in the drawings may be different from the ratio of the dimensions of the actual objects. The dimensional ratio of the object may be different between the drawings. The specific dimensional ratio of the object should be determined in consideration of the following description.

  FIG. 1 is a schematic cross-sectional view of a glass resin transparent laminate for windows according to an embodiment of the present invention. As shown in FIG. 1, the glass resin transparent laminated body 1 for windows is the transparent resin layer 2, the 1st glass layer 3, the 2nd glass layer 4, the 1st transparent contact bonding layer 5, and the 2nd. Transparent adhesive layer 6, first antireflection layer 7, and second antireflection layer 8.

  The transparent resin layer 2 is not particularly limited as long as it is a transparent resin. For example, polyethylene, polyvinyl chloride, polyethylene terephthalate, polyvinylidene chloride, polypropylene, polyvinyl alcohol, polyester, polystyrene, polyacrylonitrile, ethylene vinyl acetate copolymer , Ethylene-vinyl alcohol copolymer, ethylene-methacrylic acid copolymer, acrylic resin, polycarbonate and the like can be used. In particular, it is preferable to use an acrylic resin or a polycarbonate because of excellent transparency.

  As shown in FIG. 1, the first glass layer 3 is provided on the transparent resin layer 2. The second glass layer 4 is provided on the surface of the transparent resin layer 2 opposite to the first glass layer 3. Thereby, the transparent resin layer 2 inferior to scratch resistance can be protected appropriately.

  The first glass layer 3 and the second glass layer 4 are not particularly limited as long as they are transparent glass. For example, silica such as silica glass, borosilicate glass, soda lime glass, alkali-free glass, and aluminosilicate glass can be used. Acid salt glass is used. In particular, alkali-free glass is preferably used because of excellent abrasion resistance. Here, the alkali-free glass is a glass that does not substantially contain an alkali component (alkali metal oxide). Specifically, the content of the alkali component is 1000 ppm or less by weight. It is glass. The content of the alkali component in the present invention is preferably 500 ppm or less, and more preferably 300 ppm or less.

  The first glass layer 3 and the second glass layer 4 may use the same type of glass or different types of glass. For example, when the glass resin transparent laminate 1 for a window is used with the surface on which the first glass layer is provided on the viewing window or the like of the machine tool, the cutting residue or the like is easily scattered during the operation of the machine tool. The first glass layer 3 on the side exposed to the environment can be made of alkali-free glass that is superior in scratch resistance, and the second glass layer 4 can be made of inexpensive soda lime glass or the like.

  The thickness of the first glass layer 3 and the second glass layer 4 is preferably 300 μm or less, more preferably 20 μm to 200 μm, and particularly preferably 50 μm to 100 μm. Thereby, since the ratio for which the 1st glass layer 3 and the 2nd glass layer 4 account in the glass resin transparent laminated body 1 for windows reduces, the weight reduction of the glass resin transparent laminated body 1 for windows can be achieved. it can. When the thickness of the 1st glass layer 3 and the 2nd glass layer 4 is too large, in the glass resin transparent laminated body 1 for windows, the weight of the 1st glass layer 3 and the 2nd glass layer 4 will increase. It is difficult to reduce the weight of the glass resin transparent laminate 1 for windows. On the other hand, when the thickness of the 1st glass layer 3 and the 2nd glass layer 4 is too small, the intensity | strength of the 1st glass layer 3 and the 2nd glass layer 4 tends to be insufficient, and the glass resin transparent laminated body for windows When a flying object or the like hits 1, the first glass layer 3 and the second glass layer 4 are easily damaged. Even in this case, since the first glass layer 3 and the second glass layer 4 are supported by the transparent resin layer 2, the first glass layer 3 and the second glass layer 4 are scattered after being broken. It is possible to protect internal devices and samples.

  The thicknesses of the first glass layer 3 and the second glass layer 4 may be the same or different. For example, when the glass resin transparent laminated body 1 for windows is used for a viewing window of a machine tool, the thickness of the first glass layer 3 on the side exposed to an environment in which cutting chips and the like are easily scattered is set to be large ( For example, the thickness of the second glass layer 4 may be set smaller (for example, 50 μm).

  The total thickness of the first glass layer 3 and the second glass layer 4 is preferably smaller than the thickness of the transparent resin layer 2, and more preferably 0.1 times or less the thickness of the transparent resin layer 2. . Thereby, since the ratio for which the transparent resin layer 2 accounts in the glass resin transparent laminated body 1 for windows increases, the weight of the glass resin transparent laminated body 1 whole for windows can further be reduced, and a window is more effective. The glass resin transparent laminate 1 can be reduced in weight.

It is preferable that the density of the 1st glass layer 3 and the 2nd glass layer 4 is low. Thereby, the weight reduction of the 1st glass layer 3 and the 2nd glass layer 4 can be achieved, and the weight reduction of the glass resin transparent laminated body 1 for windows can be achieved by extension. Specifically, the density of the first glass layer 3 and the second glass layer 4 is preferably 2.6 g / cm ³ or less, and more preferably 2.5 g / cm ³ or less.

  The Young's modulus of the first glass layer 3 and the second glass layer 4 is preferably higher. Thereby, even if the thickness of the 1st glass layer 3 and the 2nd glass layer 4 is thinned to 300 micrometers or less, it becomes difficult to bend by own weight. The Young's modulus of the first glass layer 3 and the second glass layer 4 is preferably 70 GPa or more. Thereby, the glass resin transparent laminated body 1 for windows can be made into the member which requires rigidity while reducing weight.

  It is preferable that the 1st glass layer 3 and the 2nd glass layer 4 which are used for this invention consist of glass films. As a method for forming the glass film constituting the first glass layer 3 and the second glass layer 4, a known overflow down draw method, slot down draw method, float method, roll forming method, etc. can be used. In particular, the overflow downdraw method is preferable because a glass film with less warpage, smoothness (small surface roughness), and small thickness can be produced in a large amount and at low cost. The glass film produced by the overflow downdraw method does not need to adjust the thickness of the glass film by polishing, grinding, chemical etching or the like. In addition, the overflow down draw method is a molding method in which both sides of the glass plate do not come into contact with the molding member during molding, and both sides (translucent surface) of the obtained glass plate are fire-making surfaces and do not polish. Even high surface quality can be obtained. Thereby, the first glass layer 3 and the second glass layer 4 and the transparent resin layer 2 can be laminated more accurately and precisely.

  The first transparent adhesive layer 5 is disposed between the transparent resin layer 2 and the first glass layer 3 and adheres the transparent resin layer 2 and the first glass layer 3. The second transparent adhesive layer 6 is disposed between the transparent resin layer 2 and the second glass layer 4 and adheres the transparent resin layer 2 and the second glass layer 4. Thereby, since the 1st glass layer 3 and the 2nd glass layer 4 can be supported more firmly by the transparent resin layer 2, the 1st glass layer 3 and the 2nd glass layer 4 become difficult to break, It is possible to protect the apparatus and sample.

  The first transparent adhesive layer 5 and the second transparent adhesive layer 6 are not particularly limited, and a double-sided pressure-sensitive adhesive sheet, a thermoplastic adhesive sheet, a heat-crosslinkable adhesive sheet, an energy curable liquid adhesive, or the like is used. For example, optical transparent adhesive sheet (OCA), ethylene / vinyl acetate copolymer resin (EVA), thermoplastic polyurethane (TPU), polyvinyl butyral (PVB), ionoplast resin, acrylic thermoplastic adhesive sheet, ultraviolet ray You may adhere | attach using a curable adhesive, a thermosetting adhesive, a normal temperature curable adhesive, etc. When using an adhesive, it is preferable to use an adhesive that exhibits a transparent state after bonding. Further, if the first transparent adhesive layer 5 and the second transparent adhesive layer 6 have ultraviolet shielding properties (ultraviolet absorption), the transparent resin layer 2 can be prevented from being deteriorated by ultraviolet rays.

  The spectral transmittance of the first transparent adhesive layer 5 and the second transparent adhesive layer 6 is preferably 90% or more, more preferably 92% or more, and 94% or more in the wavelength range of 430 nm to 680 nm. It is particularly preferred that Thereby, the visibility to the inside of a machine tool, a clean bench, a glove box, etc. can be improved.

  The thicknesses of the first transparent adhesive layer 5 and the second transparent adhesive layer 6 are each preferably 25 μm to 1000 μm, more preferably 25 μm to 800 μm, and particularly preferably 50 μm to 500 μm. If the thickness of the transparent adhesive layer is too small, it becomes difficult to absorb the difference in expansion and contraction due to the difference in thermal expansion among the transparent resin layer 2, the first glass layer 3, and the second glass layer 4. On the other hand, when the thickness of the transparent adhesive layer is too large, the spectral transmittance of the first transparent adhesive layer 5 and the second transparent adhesive layer 6 tends to be lowered.

  The haze of the first transparent adhesive layer 5 and the second transparent adhesive layer 6 is preferably 2% or less, more preferably 1% or less, and 0.5% or less. Is particularly preferred. Thereby, when the material with high transparency, such as an acryl and a polycarbonate, is used as the transparent resin layer 2, the glass resin transparent laminated body 1 for windows with high transparency can be obtained. The haze (haze) can be measured using a haze meter (for example, NDH-5000 manufactured by Nippon Denshoku Industries Co., Ltd.) based on JIS K 7136 (2010).

  The first antireflection layer 7 is provided on the surface of the first glass layer 3 opposite to the transparent resin layer 2. The second antireflection layer 8 is provided on the surface of the second glass layer 4 opposite to the transparent resin layer 2. Thereby, the glass resin transparent laminated body 1 for windows which can visually recognize the inside of a machine tool, a clean bench, a glove box, etc. by external light, such as a fluorescent lamp, can be produced.

  The first antireflection layer 7 and the second antireflection layer 8 are preferably made of an inorganic material. Thereby, the abrasion resistance of the glass resin transparent laminated body 1 for windows can further be improved.

  More preferably, the first antireflection layer 7 and the second antireflection layer 8 are each composed of, for example, a low refractive index layer having a lower refractive index than the first glass layer 3 and the second glass layer 4. . In addition, the first antireflection layer 7 and the second antireflection layer 8 are formed by alternately laminating a low refractive index layer having a relatively low refractive index and a high refractive index layer having a relatively high refractive index, for example. More preferably, it consists of alternating layers. As the alternating layers, the total number of layers of the first antireflection layer 7 and the second antireflection layer 8 is 8 or more, and the luminous reflectance of the glass resin transparent laminate 1 for windows is 0. Since it is 5% or less, it is preferable that it is 10 layers or more, more preferably, the luminous reflectance of the glass resin transparent laminate 1 for windows is 0.2% or less, and that it is 14 layers or more. Since the luminous reflectance of the glass resin transparent laminate 1 for use is 0.16% or less, it is particularly preferable. If the total number of the first antireflection layer 7 and the second antireflection layer 8 is too small, the inside of a machine tool, a clean bench, a glove box or the like is likely to be reflected by external light such as a fluorescent lamp. . On the other hand, the total number of layers of the first antireflection layer 7 and the second antireflection layer 8 is preferably 40 or less, more preferably 35 or less, and particularly preferably 30 or less. preferable. If the total number of layers of the first antireflection layer 7 and the second antireflection layer 8 is too large, the layers of the first antireflection layer 7 and the second antireflection layer 8 are easy to peel off and are economical. is not. It is preferable that the first antireflection layer 7 and the second antireflection layer 8 have the same number of layers, and it is more preferable that the configuration and the thickness of each layer are exactly the same.

  The luminous reflectance is the tristimulus chromaticity Y defined in JIS Z 8701 (1999), and the chromaticity Y is measured using a spectrophotometer (Hitachi, U-4100). The reflectance from the surface on the antireflection layer side can be measured and obtained by calculation according to the JIS. At this time, the viewing angle was 12 °.

  The low refractive index layer preferably contains one selected from the group consisting of silicon oxide, aluminum oxide and magnesium fluoride, and the total physical thickness of the low refractive layer on one side is preferably 100 nm to 700 nm. The high refractive index layer is a kind selected from the group consisting of silicon nitride, aluminum nitride, silicon oxynitride, aluminum oxide, zirconium oxide, niobium oxide, tantalum oxide, hafnium oxide, titanium oxide, tin oxide and zinc oxide. The total physical thickness of the high refractive index layer on one side is preferably 50 nm to 250 nm.

  Examples of the method for forming the first antireflection layer 7 on the first glass layer 3 and the method for forming the second antireflection layer 8 on the second glass layer 4 include sputtering, vacuum deposition, dipping, A spin coating method, an ion plating method, a CVD method, or the like can be used. However, when a sputtering method is employed, the thickness of each layer is uniform, and the first glass layer 3 and the second glass layer 4 It is preferable because the adhesion is strong and the hardness of the first antireflection layer 7 and the second antireflection layer 8 is increased. In particular, when the thickness of the first glass layer 3 or the second glass layer 4 is thin, the temperature easily rises even when heated. In addition, since the heat resistance is low, it is difficult to employ a film forming means with heating on the surface of the transparent resin body. However, the first antireflection layer 7 and the second antireflection layer 8 are respectively formed on the first antireflection layer 7 and the second antireflection layer 8. After forming on the surface of the glass layer 3 and the 2nd glass layer 4, the transparent resin layer 2, the 1st glass layer 3, and the 2nd glass layer 4 are respectively, the 1st transparent contact bonding layer 5 and the 2nd glass layer 4. By laminating via the transparent adhesive layer 6, it is lightweight, highly scratch-resistant, difficult to bend, and can be seen without reflection by external light such as fluorescent lamps inside machine tools, clean benches, glove boxes, etc. A glass resin transparent laminate 1 can be produced.

  FIG. 2 is a schematic cross-sectional view of a glass resin transparent laminate for windows according to another embodiment of the present invention. As shown in FIG. 2, the glass resin transparent laminate 1 for a window includes a transparent resin layer 2, a first glass layer 3, a second glass layer 4, a first transparent adhesive layer 5, and a second glass layer. The transparent adhesive layer 6, the first antireflection layer 7, the second antireflection layer 8, the first water repellent layer 11, and the second water repellent layer 12 are provided.

  The first water repellent layer 11 is provided on the surface of the first antireflection layer 7 opposite to the first glass layer 3. The second water repellent layer 12 is provided on the surface of the second antireflection layer 8 opposite to the second glass layer 4. The first water-repellent layer 11 and the second water-repellent layer 12 have a function of preventing adhesion of water droplets, cutting residue, etc. on the surface of a viewing window or the like of a machine tool or preventing clouding due to human breath. Have The material of the first water-repellent layer 11 and the second water-repellent layer 12 may be any material having water repellency. For example, an alkyl group-containing silane compound, an alkyl group-containing silicon compound, a fluorine-containing silane compound, Fluoroalkylsilazanes, fluoroalkylsilanes, fluorine-containing silicon compounds, perfluoropolyether group-containing silane coupling agents and the like can be mentioned. In particular, the first water repellent layer 11 and the second water repellent layer 12 are made of a fluorine-containing silane compound, a fluoroalkylsilazane, a fluoroalkylsilane, a fluorine-containing silicon compound, a perfluoropolyether group-containing silane coupling agent, or the like. Thus, it is preferable that fluorine is included. As a result, not only water repellency but also oil repellency and low friction can be imparted, so that dirt and fingerprints are prevented from sticking to the surface of the glass resin transparent laminate 1 for windows, and the glass resin transparent laminate 1 for windows is prevented. Scratch resistance can be further improved.

  The first water repellent layer 11 and the second water repellent layer 12 are not only vacuum dry processes such as vapor deposition, sputtering, CVD, and plasma polymerization, but also microgravure, screen coating, dip coating, and spraying. It can be formed by a wet process such as a method. The thickness of the first water-repellent layer 11 and the second water-repellent layer 12 is preferably 1 nm to 30 nm, and more preferably 4 nm to 20 nm.

  FIG. 3 is a schematic cross-sectional view of a glass resin transparent laminate for windows according to another embodiment of the present invention. As shown in FIG. 3, the glass resin transparent laminate 1 for a window includes a transparent resin layer 2, a first glass layer 3, a second glass layer 4, a first transparent adhesive layer 5, and a second glass layer. The transparent adhesive layer 6, the first antireflection layer 7, the second antireflection layer 8, the first water repellent layer 11, and the hydrophilic layer 13 are provided.

  The hydrophilic layer 13 is provided on the surface of the second antireflection layer 8 opposite to the second glass layer 4. The hydrophilic layer 13 only needs to contain a hydrophilic group such as a hydroxyl group on the surface, and examples thereof include inorganic oxides such as silicon oxide, aluminum oxide, titanium oxide, and zirconium oxide. Silicon oxide is preferable because it has a low refractive index of 1.45 and does not impair the antireflection effect of the second antireflection layer 8. Titanium oxide is preferable because it has photocatalytic properties and the surface of the hydrophilic layer 13 is less likely to become dirty.

  The hydrophilic layer 13 can be formed by a wet process such as a microgravure method, a screen coat method, a dip coat method, or a spray method in addition to a vacuum dry process such as an evaporation method, a sputtering method, a CVD method, or a plasma polymerization method. The thickness of the hydrophilic layer 13 is preferably 10 nm to 300 nm, and more preferably 20 nm to 200 nm.

  Hereinafter, although the glass resin transparent laminated body for windows of this invention is demonstrated in detail based on an Example, this invention is not limited to these Examples.

Example 1
A rectangular glass film having a length of 300 mm, a width of 300 mm, and a thickness of 100 μm was prepared as the first glass layer and the second glass layer. As the glass film, non-alkali glass (manufactured by Nippon Electric Glass Co., Ltd., OA-10G, coefficient of thermal expansion at 30 to 380 ° C .: 38 × 10 ⁻⁷ / ° C.) was used. The glass film formed by the overflow downdraw method was used as it was without being polished.

  On one surface of the first glass layer and the second glass layer, a first antireflection layer and a second antireflection layer composed of alternating layers having the structure described in Table 1 were formed by sputtering, respectively. . Niobium oxide (refractive index of light having a wavelength of 500 nm: 2.33) was used as the material of the high refractive index layer, and silicon oxide (refractive index of light of the wavelength of 500 nm: 1.46) was used as the material of the low refractive index layer.

  A rectangular polycarbonate plate having a length of 300 mm, a width of 300 mm, and a thickness of 4 mm was prepared as a transparent resin layer, and an acrylic optical transparent pressure-sensitive adhesive sheet having a thickness of 25 μm was prepared as a first adhesive layer and a second adhesive layer. A transparent resin layer, a first glass layer, and a second glass layer are laminated through a first transparent adhesive layer and a second transparent adhesive layer, respectively, to thereby join a glass resin transparent laminate for windows. Produced.

(Example 2)
The glass resin for windows is transparent in substantially the same manner as in Example 1 except that an ethylene / vinyl acetate copolymer resin (EVA) having a thickness of 25 μm is used as the first adhesive layer and the second adhesive layer. A laminate was produced.

Example 3
Example 4
(Comparative Example 1)
A rectangular glass film having a length of 300 mm, a width of 300 mm, and a thickness of 100 μm was prepared as the first glass layer and the second glass layer. As the glass film, non-alkali glass (manufactured by Nippon Electric Glass Co., Ltd., OA-10G, coefficient of thermal expansion at 30 to 380 ° C .: 38 × 10 ⁻⁷ / ° C.) was used. The glass film formed by the overflow downdraw method was used as it was without being polished.

  A rectangular polycarbonate plate having a length of 300 mm, a width of 300 mm, and a thickness of 4 mm was prepared as a transparent resin layer, and an acrylic optical transparent pressure-sensitive adhesive sheet having a thickness of 25 μm was prepared as a first adhesive layer and a second adhesive layer. A transparent resin layer, a first glass layer, and a second glass layer are laminated through a first transparent adhesive layer and a second transparent adhesive layer, respectively, to thereby join a glass resin transparent laminate for windows. Produced.

(Visibility)
Visibility was evaluated by measuring luminous reflectance. The luminous reflectance of each of Examples 1 to 4 was 0.2%, and the inside of the machine tool, clean bench, glove box, and the like was visible without being reflected by external light such as a fluorescent lamp. On the other hand, the luminous reflectance of Comparative Example 1 was 8%, and reflection of external light such as a fluorescent lamp occurred inside the machine tool, clean bench, glove box, and the like.

(Water repellency)
For water repellency, 0.1 ml of water droplets were dropped from a dropper on the surface of the first water-repellent layer and the second water-repellent layer of the glass resin transparent laminate for windows. This was evaluated by measuring the contact angle between the second water-repellent layer and the water droplet. The contact angle was measured based on the Atan 1 / 2θ method based on the Young formula. The contact angle between the first water-repellent layer and water droplets in Example 3, the contact angle between the second water-repellent layer and water droplets, and the contact angle between the first water-repellent layer and water droplets in Example 4 are all 110. ° and had high water repellency.

(Hydrophilic)
The hydrophilicity was evaluated by dropping 0.1 ml of water droplets from a dropper on the surface of the hydrophilic layer of the glass resin transparent laminate for windows and measuring the contact angle between the water repellent layer and the water droplets. The contact angle was measured based on the Atan 1 / 2θ method based on the Young formula. The contact angle between the hydrophilic layer and the water droplets in Example 4 was 2 °, and had high hydrophilicity.

  INDUSTRIAL APPLICABILITY The present invention is suitable for a glass resin transparent laminated body for windows used for a viewing window for machine tools, a viewing window for experimental equipment such as a clean bench and a glove box.

DESCRIPTION OF SYMBOLS 1 Glass-resin transparent laminated body 2 Window transparent resin layer 3 1st glass layer 4 2nd glass layer 5 1st transparent contact bonding layer 6 2nd transparent contact bonding layer 7 1st antireflection layer 8 2nd reflection Prevention layer 11 First water repellent layer 12 Second water repellent layer 13 Hydrophilic layer

Example 3
After forming the first antireflection layer on one surface of the first glass layer, a perfluoropolyether group-containing silane coupling agent (Optool manufactured by Daikin Industries, Ltd.) (Registered trademark) DSX) was applied by spraying and dried to form the first water-repellent layer, and after forming the second antireflection layer on one surface of the second glass layer Then, a perfluoropolyether group-containing silane coupling agent (manufactured by Daikin Industries, Ltd., OPTOOL (registered trademark) DSX) is applied to the surface of the second antireflection layer by a spray method and dried to give a second repellent property. A glass resin transparent laminate for windows was produced in substantially the same manner as in Example 1 except that an aqueous layer was formed.
Example 4
After forming the first antireflection layer on one surface of the first glass layer, a perfluoropolyether group-containing silane coupling agent (Optool manufactured by Daikin Industries, Ltd.) (Registered trademark) DSX) was applied by spraying and dried to form the first water-repellent layer, and after forming the second antireflection layer on one surface of the second glass layer The hydrophilic layer was formed on the surface of the second antireflection layer by applying a hydrophilic group-containing alkoxysilane, 10% ethanol solution (LAMBIC-400EP, manufactured by Osaka Organic Chemical Industry Co., Ltd.) by spraying and drying. Except for this, a glass resin transparent laminate for windows was produced in substantially the same manner as in Example 2.
(Comparative Example 1)
A rectangular glass film having a length of 300 mm, a width of 300 mm, and a thickness of 100 μm was prepared as the first glass layer and the second glass layer. As the glass film, non-alkali glass (manufactured by Nippon Electric Glass Co., Ltd., OA-10G, coefficient of thermal expansion at 30 to 380 ° C .: 38 × 10 ⁻⁷ / ° C.) was used. The glass film formed by the overflow downdraw method was used as it was without being polished.

Claims (12)

A transparent resin layer;
A first glass layer provided on the transparent resin layer;
A second glass layer provided on the surface of the transparent resin layer opposite to the first glass layer;
A first transparent adhesive layer, which is disposed between the transparent resin layer and the first glass layer, and bonds the transparent resin layer and the first glass layer;
A second transparent adhesive layer that is disposed between the transparent resin layer and the second glass layer, and bonds the transparent resin layer and the second glass layer;
A first antireflection layer provided on the surface of the first glass layer opposite to the transparent resin layer;
A second antireflection layer provided on the surface of the second glass layer opposite to the transparent resin layer;
A glass resin transparent laminate for windows, comprising:   The glass resin transparent laminate for windows according to claim 1, wherein the first glass layer and / or the second glass layer has a thickness of 300 μm or less.   The glass resin transparent laminate for windows according to claim 1 or 2, wherein the transparent resin layer is larger than a total thickness of the first glass layer and the second glass layer.   4. The total thickness of the first glass layer and the second glass layer is 0.1 times or less of the thickness of the transparent resin layer. 5. Glass resin transparent laminate for windows.   The glass resin transparent laminate for windows according to any one of claims 1 to 4, wherein the first glass layer and / or the second glass layer is non-alkali glass.   The first antireflection layer and / or the second antireflection layer are alternately laminated with a low refractive index layer having a relatively low refractive index and a high refractive index layer having a relatively high refractive index. It is made, The glass resin transparent laminated body for windows as described in any one of Claims 1-5 characterized by the above-mentioned.   The first water-repellent layer provided on the surface of the first antireflection layer opposite to the first glass layer, further comprising a first water repellent layer. The glass resin transparent laminate for windows described in 1.   The glass resin transparent laminate for windows according to claim 7, wherein the first water repellent layer contains fluorine.   The second water-repellent layer provided on the surface of the second antireflection layer opposite to the second glass layer, further comprising a second water repellent layer. The glass resin transparent laminate for windows described in 1.   The glass resin transparent laminate for windows according to claim 9, wherein the second water repellent layer contains fluorine.   The window according to claim 1, further comprising a hydrophilic layer provided on a surface of the second antireflection layer opposite to the second glass layer. Glass resin transparent laminated body. It is used for the inspection window of a machine tool, The glass resin transparent laminated body for windows as described in any one of Claims 1-11 characterized by the above-mentioned.