TW201637845A - Laminated glass plate - Google Patents

Abstract

The present invention solves the problem of color unevenness or the like in a glass plate formed by laminating a transparent resin molded body. In a laminated glass plate according to the present invention, an orientation film having a retardation of 3000-150000 nm, a transparent resin molded body, and a glass plate are laminated.

Description

Laminated glass plate

The present invention discloses a laminated glass sheet comprising a laminated alignment film, a transparent resin molded body, and a glass plate.

The transparent resin molded body is widely used in window materials used in general buildings and high-rise buildings, roof windows, frame edges and display cases, automobiles, and electric cars, etc. because of its excellent physical punch resistance and good light transmittance. Window materials used in transportation vehicles, etc.

However, the transparent resin molded body is comparable to glass which is an inorganic material from the viewpoint of transparency and light-harvesting property, but is inferior to glass in chemical resistance, weather resistance, and scratch resistance. Moreover, the texture of the surface is not as good as that of glass, and glass is more suitable for high-end performances.

From the viewpoint of the foregoing, it has been proposed to form a glass plate of a volumetric glass plate in a transparent resin. For example, Patent Document 1 proposes a laminated glass plate in which glass/polyvinyl butyral/polycarbonate/polyvinyl butyral/glass is sequentially laminated. In Patent Document 1, it is proposed that the transparent resin molded body is sandwiched between glass sheets excellent in weather resistance and scratch resistance, and the respective advantages of the glass plate and the transparent resin molded body are complemented by respective disadvantages.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Publication No. 6-915

When a laminated glass plate in which a transparent resin molded body and a glass plate are combined, for example, when used in a window glass of a building such as a high-rise building, if the window glass is irradiated with light such as sunlight or a fluorescent lamp, the observed color is observed. Spot (including rainbow spots) problems.

Further, the resin material is rich in color variation as compared with glass, and can be used for various products such as a colorless and highly transparent product, a transparent coloring product, and an opaque coloring product. For example, the cover and outer casing of the ornament. In such applications, for example, when external light is reflected by the transparent resin molded body, the problem of exhibiting some fine spots is also found.

An object of the present invention is to solve the problem of the stain of the glass plate in which the transparent resin molded body is laminated.

The inventors of the present invention have found that the above problem can be solved by using an alignment film whose retardation is controlled to be 3000 nm or more and 150,000 nm or less. Based on this knowledge, the invention represented below is provided.

Item 1.

A laminated glass sheet having an alignment film having a retardation of 3,000 or more and 150,000 nm or less, a transparent resin molded body, and a glass plate.

Item 2.

The laminated glass sheet according to item 1, wherein the transparent resin molding system is formed of at least one selected from the group consisting of an acrylic resin and a polycarbonate resin.

Item 3.

The laminated glass sheet according to Item 1 or 2, wherein the alignment film is a polyester film.

Item 4.

The laminated glass sheet according to any one of items 1 to 3, which is used for building materials.

Item 5

The laminated glass sheet according to any one of items 1 to 3, which is for use in a vehicle.

Item 6.

A window glass having an alignment film having a retardation of 3,000 or more and 150,000 nm or less, a transparent resin molded body, and a glass plate.

The present invention provides a laminated glass sheet which suppresses generation of a color spot (a rainbow spot) when white light such as sunlight or a fluorescent lamp is irradiated. In a preferred embodiment, the suppressed stain is a stain observed in a state in which a part of the light irradiated from the oblique direction is partially reflected on the laminated glass sheet.

[Formation of the Invention]

The laminated glass sheet is preferably an alignment film having a retardation of 3,000 or more and 150,000 nm or less, a transparent resin molded body, and a glass plate. The order of lamination of the alignment film, the transparent resin molded body, and the glass plate is arbitrary. The specific stacking sequence is described later. In one embodiment, the laminated glass sheet preferably has an alignment film on at least one surface of the transparent resin molded body, and more preferably has an alignment film on both surfaces. Moreover, in one embodiment, it is preferable that the laminated glass plate has a glass plate in at least one of the transparent resin laminated bodies, and more preferably a double-layered glass plate. The specific constitution of these will be described later.

<Alignment film>

The retardation of the alignment film is preferably from 3,000 nm to 150,000 nm from the viewpoint of reducing the color unevenness. The term "delay" as used in the present specification means a measurement of a retardation at a wavelength of 589 nm unless otherwise specified. In addition, in this specification, when it simply describes "delay", it means in-plane delay. From the viewpoint of more effectively suppressing the generation of rainbow spots, the lower limit of the retardation of the alignment film is preferably 4,500 nm or more, preferably 6,000 nm or more, preferably 8,000 nm or more, and more preferably 10,000 nm or more. On the other hand, the upper limit of the retardation of the alignment film, even if an alignment film having a retardation or more is used, substantially no further improvement in visibility is obtained, and the thickness of the alignment film tends to increase depending on the height of the retardation. Therefore, from the viewpoint of not requiring a reduction in the thickness of the laminated glass sheet, it is set to 150,000 nm, but it may be set to a higher value. When the alignment film is provided on both surfaces of the transparent resin molded body, the retardation of the two alignment films may be the same or different.

Alignment thinner from the viewpoint of more effectively suppressing color spots The ratio of the retardation (Re) to the thickness direction retardation (Rth) (Re/Rth) of the film is preferably 0.2 or more, preferably 0.5 or more, and more preferably 0.6 or more. The retardation in the thickness direction means an average value of the retardation obtained by multiplying the two birefringences ΔNxz and ΔNyz by the film thickness d when viewed from the cross section of the film thickness direction. The larger the Re/Rth, the more the effect of birefringence is increased, and the generation of color spots can be suppressed more effectively. The thickness direction retardation was also measured at a measurement wavelength of 589 nm.

The maximum value of Re/Rth is 2.0 (that is, a completely uniaxial symmetrical film), but the mechanical strength in the direction orthogonal to the alignment direction tends to decrease as the film is nearly completely uniaxially symmetric. Therefore, the upper limit of Re/Rth of the polyester film is preferably 1.2 or less, more preferably 1.0 or less.

The delay can be measured according to well-known methods. Specifically, the refractive index and thickness in the biaxial direction can be measured and determined. It can also be obtained by using a commercially available automatic birefringence measuring device (for example, KOBRA-21ADH: manufactured by Oji Scientific Instruments Co., Ltd.).

The alignment film can be produced by appropriately selecting a known method. For example, the alignment film may be selected from the group consisting of polyester resins, polycarbonate resins, polystyrene resins, para-type polystyrene resins, polyether ether ketone resins, polyphenylene sulfide resins, cyclic olefin resins, and liquid crystalline polymerization. It is produced by one or more types of the resin of the resin and the resin of the liquid crystal compound added to the cellulose resin. Therefore, the alignment film may be a polyester film, a polycarbonate film, a polystyrene film, a para-polystyrene film, a polyetheretherketone film, a polyphenylene sulfide film, a cycloolefin film, a liquid crystalline film, or a cellulose. A film of a liquid crystal compound is added to the resin.

The preferred raw material resin for the alignment film is selected from the group consisting of polycarbons One or more resins of the group of acid esters, polyesters, and para-type polystyrene. These resins have good transparency, good thermal and mechanical properties, and can be easily controlled by extension processing. The polyester represented by polyethylene terephthalate and polyethylene naphthalate has a large intrinsic birefringence, and it is easy to obtain a large retardation even if the thickness of the film is thin, so that it is preferable as a raw material of the alignment film. In particular, polyethylene naphthalate has a large birefringence in the polyester, and therefore it is desirable to particularly increase the retardation or to reduce the thickness of the film while maintaining a high retardation.

<Method for Producing Alignment Film>

Hereinafter, a method of producing an alignment film will be described by taking a polyester film as an example. The polyester film can be obtained by condensing any dicarboxylic acid and diol. Examples of the dicarboxylic acid include terephthalic acid, isophthalic acid, phthalic acid, 2,5-naphthalene dicarboxylic acid, 2,6-naphthalene dicarboxylic acid, and 1,4-naphthalene dicarboxylic acid. Acid, 1,5-naphthalene dicarboxylic acid, diphenyl carboxylic acid, diphenoxy ethane dicarboxylic acid, diphenyl hydrazine carboxylic acid, hydrazine dicarboxylic acid, 1,3-cyclopentane dicarboxylic acid, 1, 3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, hexahydroterephthalic acid, hexahydroisophthalic acid, malonic acid, dimethylmalonic acid, succinic acid, 3, 3-diethyl succinic acid, glutaric acid, 2,2-dimethylglutaric acid, adipic acid, 2-methyladipate, trimethyl adipate, pimelic acid, sebacic acid, Dimer acid, sebacic acid, suberic acid, dodecane dicarboxylic acid, and the like.

Examples of the diol include ethylene glycol, propylene glycol, hexanediol, neopentyl glycol, 1,2-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, and decanediol. 3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2-bis(4-hydroxyphenyl)propane, bis(4-hydroxyphenyl) Hey.

The dicarboxylic acid component and the diol component constituting the polyester film may be used singly or in combination of one or more kinds. Specific examples of the polyester resin constituting the polyester film include polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate. The ester or the like is preferably polyethylene terephthalate or polyethylene naphthalate, preferably polyethylene terephthalate. The polyester resin may contain other copolymerization components, and the ratio of the copolymerization component is preferably 3 mol% or less, preferably 2 mol% or less, more preferably 1.5 mol%, from the viewpoint of mechanical strength. %the following. These resins are excellent in transparency and excellent in heat and mechanical properties. Moreover, the resins can be easily controlled by extension processing.

The polyester film can be obtained according to a general production method.

Specifically, an oriented polyester film which is a molten polyester resin and which is extruded into a sheet shape and formed into an unaligned polyester is used, and a temperature difference of the roll is used in the longitudinal direction at a temperature higher than the glass transition temperature. After stretching, the heat-treated alignment polyester film was subjected to stretching in the transverse direction by a tenter. The polyester film may be a uniaxially stretched film or a biaxially stretched film. The alignment film may also be extended at an angle of 45 degrees.

The production conditions for obtaining the polyester film can be appropriately set according to well-known techniques. For example, the longitudinal stretching temperature and the transverse stretching temperature are usually 80 to 130 ° C, preferably 90 to 120 ° C. The longitudinal stretching ratio is usually 1.0 to 3.5 times, preferably 1.0 to 3.0 times. Further, the lateral stretching ratio is usually 2.5 to 6.0 times, preferably 3.0 to 5.5 times.

The retardation is controlled to a specific range, and can be performed by appropriately setting the stretching ratio or the stretching temperature and the thickness of the film. For example, longitudinal extension The higher the difference in the stretching ratio from the lateral stretching, the lower the stretching temperature, and the thicker the thickness of the film, the higher the retardation is easily obtained. On the other hand, the lower the difference in stretch ratio between the longitudinal extension and the lateral extension, the higher the extension temperature, and the thinner the thickness of the film, the easier it is to obtain a low retardation. Further, as the elongation temperature is higher and the total stretching ratio is lower, it is easier to obtain a film having a lower retardation (Re/Rth) ratio in the thickness direction. On the other hand, the lower the extension temperature and the higher the total stretching ratio, the easier it is to obtain a film having a high ratio of retardation to retardation in the thickness direction (Re/Rth). Further, the heat treatment temperature is usually preferably from 140 to 240 ° C, preferably from 180 to 240 ° C.

In order to suppress the variation of the retardation of the polyester film, it is preferred that the thickness of the film is small. When the longitudinal stretching ratio is lowered in order to cause a delay difference, the value of the vertical thickness spot may become high. Since the value of the longitudinal thickness spot has a very high range in a certain range of the stretching ratio, it is preferable to set the film forming conditions so as to avoid this range.

The thickness of the alignment film is preferably 5.0% or less, more preferably 4.5% or less, still more preferably 4.0% or less, and most preferably 3.0% or less. The thickness of the film can be measured by any means. For example, a continuous tape-like sample (length 3 m) can be taken in the flow direction of the film, and a commercially available measuring instrument (for example, an electronic micrometer Miritoron 1240 manufactured by SEIKO EM) can be used to measure 100 points at a pitch of 1 cm. The thickness was determined by the maximum value (dmax), the minimum value (dmin), and the average value (d) of the thickness, and the thickness spot (%) was calculated by the following formula. Thickness spot (%) = ((dmax-dmin) / d) × 100

The thickness of the alignment film is not particularly limited. For example, the lower limit of the thickness of the alignment film is 20 μm or more, preferably 50 μm or more, and the upper limit of the thickness of the alignment film is 300 μm or less, preferably 250 μm or less.

<Transparent resin molded body>

The transparent resin molded body can be produced by appropriately selecting a known thermoplastic resin from a thermoplastic resin having transparency. Examples of the raw material resin of the transparent resin molded body include polyethylene terephthalate (PET), polypropylene (PP), polycarbonate (PC), polystyrene (PS), acrylic resin, and chlorine. Vinyl resin, and polymethylpentene (PMP). Among these, from the viewpoint of good mechanical strength, it is preferably one or more selected from the group consisting of polycarbonate (PC) and acrylic resin.

The transparent resin molded body may have any shape, and may be, for example, a flat shape, a curved surface, a casing or a part of a casing such as a film or a sheet.

The transparent resin molded body typically has a portion having a retardation of 150 nm or more.

The thickness of the transparent resin molded body is arbitrary, but is, for example, 0.1 mm or more or 0.2 mm or more. The upper limit of the thickness of the transparent resin molded body is, for example, 5 mm or less or 4 mm or less.

The method for producing the transparent resin molded body is not particularly limited, and a generally used molding method can be used for the thermoplastic resin composition. For example, in the case where the transparent resin molded body is an unstretched sheet, a melt extrusion method, a calender molding method, an injection molding method, a sheet press molding method, a vacuum forming method, a press molding method, and the like can be given. The transparent resin molded body may be a multilayer sheet, or may be an in-mold forming, an insert molding or the like of an extended or unstretched film.

The transparent resin molded body is molecularly aligned through the flow or strain residual during molding even if it is not extended. In particular, in the injection molded body, the molecules have an irregular alignment. Presumably the above is the cause, When the external light is applied to the transparent resin molded body, the color unevenness is observed. However, the simple formation of the film in the area layer of at least one of the transparent resin molded bodies can suppress the occurrence of color spots.

<glass plate>

The glass plate is not particularly limited as long as it is used for a window such as a building or a transportation tool or a glass plate of a display case, and its material, shape, size, and the like are arbitrary. The glass plate may also be planar or curved. The glass constituting the glass plate is, for example, a silicate glass, preferably one or more selected from the group consisting of cerium oxide glass, borosilicate glass, soda lime glass, and aluminosilicate glass, and more preferably Alkali-free glass. In general, when the glass contains an alkali component and is continuously used in a state where it is exposed to the external environment for a long period of time, the cation is detached on the surface, causing so-called alkali precipitation, and the structure is changed. It is thick and has the deterioration of the transparency of glass. The alkali-free glass is a glass which does not substantially contain an alkali component (alkali metal oxide), specifically, a glass having a weight ratio of an alkali component of 1000 ppm or less. The weight ratio of the alkali component contained in the glass is preferably 500 ppm or less, more preferably 300 ppm or less. Further, chemically strengthened glass or physically strengthened glass may be used as the glass. In an embodiment (for example, when a laminated glass plate is used for a glazing), the glass plate is preferably a glass plate formed of soda lime glass (soda glass).

The thickness of the glass plate is arbitrary. The lower limit of the thickness of the glass plate is preferably 10 μm or more, more preferably 50 μm or more, and still more preferably 100 μm or more. The upper limit of the thickness of the glass plate is preferably 1.5 cm or less, preferably 1 cm or less, preferably 0.7 cm or less, preferably 0.5 cm or less, preferably 0.3 cm or less, preferably 1,000 μm or less, more preferably 500μm or less, and then better 300 μm or less. The greater the thickness of the glass sheet, the higher the strength of the laminated glass sheet. On the other hand, the thinner the thickness of the glass sheet, the more the weight of the laminated glass sheet can be reduced. In one embodiment, the thickness of the glass sheet is preferably smaller than the thickness of the transparent resin molded body. Thereby, the proportion of the glass sheets in the laminated glass sheets can be reduced, so that the weight of the laminated glass sheets can be reduced. Further, when chemically strengthened glass is used as the glass, the thickness thereof is preferably 300 μm or more and 1000 μm or less.

The density of the glass is preferably low. Thereby, the weight of the glass can be reduced, and the weight of the laminated glass plate can be reduced. Specifically, the density of the glass is preferably 2.6 g/cm ³ or less, more preferably 2.5 g/cm ³ or less.

A glass plate which satisfies the above characteristics is well known and can be obtained by any manufacturing method.

A well-known adhesive agent can be used for laminated laminated film, a transparent resin molded object, and a glass plate. The kind of the subsequent agent is arbitrary and is not particularly limited.

The structure of the laminated glass may be any one as long as the above-mentioned alignment film, transparent resin molded body, and glass plate are laminated. An appropriate lamination sequence (constitution) of the assumed laminated glass is exemplified below.

(A) Glass plate / alignment film / transparent resin molded body / alignment film / glass plate

(B) Glass plate / alignment film / transparent resin molded body / glass plate

(C) Glass plate/alignment film/transparent resin molded body/glass plate/alignment film

(D) Glass plate / alignment film / transparent resin molded body

(E) alignment film/glass plate/transparent resin molded body

(F) Glass plate / transparent resin molded body / alignment film

The alignment film, the transparent resin molded body, and the alignment film may be laminated with a functional layer (adhesive layer) for promoting the adhesion in addition to the adhesive.

In one embodiment, a laminated glass panel is used as a window glass for a building. In one embodiment, the laminated glass sheet is used as a window glass (including front glass) for transportation vehicles such as automobiles, electric trains, ships, and airplanes. In one embodiment, a laminated glass panel is used as a glass panel for a display cabinet or frame. The shape and size of the laminated glass plate are arbitrary, and are not particularly limited, and may be flat or curved.

[Examples]

The present invention will be specifically described by the following examples, but the present invention is not limited to the following examples, and may be carried out with appropriate modifications within the scope of the gist of the present invention, and these are all included in the present invention. The technical scope.

<Production of alignment film>

Alignment film 1

The PET resin pellet having an intrinsic viscosity of 0.62 dl/g was dried under reduced pressure (1 Torr) at 135 ° C for 6 hours, and then supplied to an extruder and dissolved at 285 ° C. The polymer was filtered through a filter medium of a stainless steel sintered body (manufactured by a nominal filtration rate of 10 μm particles and removed by 95%), extruded into a sheet shape by a nozzle, and then wound by a casting drum having a surface temperature of 30 ° C by an electrostatic application casting method. The film was cooled and solidified to produce an unstretched film.

The unstretched film is guided to the tenter stretching machine, and the end portion of the film is held by the jig while being guided to the hot air zone at a temperature of 125 ° C. , extending 4.0 times in the width direction. Next, the width extending in the width direction was maintained, and the film was treated at 225 ° C for 30 seconds, and then subjected to a 3% relaxation treatment in the width direction to obtain a uniaxially aligned alignment film 1 having a film thickness of about 100 μm. The delay value is 10200 nm. The Rth was 13233 nm and the Re/Rth ratio was 0.771.

Alignment film 2

The uniaxially aligned alignment film 2 was obtained in the same manner as the alignment film 1 except that the thickness of the film was changed to about 80 μm by changing the thickness of the unstretched film. The delay value is 8300 nm. Rth is 10700 nm and the Re/Rth ratio is 0.776.

Alignment film 3

The uniaxially aligned alignment film 3 was obtained in the same manner as the alignment film 1 except that the thickness of the film was changed to about 50 μm by changing the thickness of the unstretched film. The delay value is 5200 nm. The Rth was 6600 nm and the Re/Rth ratio was 0.788.

Alignment film 4

The unstretched film was heated to 105 ° C using a heated roll group and an infrared heater, and then extended by 2.0 times in the traveling direction by a roll group having a circumferential speed difference, and then extended 4.0 times in the width direction in the same manner as the alignment film 1 . The alignment film 4 having a biaxially oriented film thickness of about 50 μm was obtained in the same manner as the alignment film 1 except for the alignment film 1. The delay value is 3200 nm. The Rth was 7340 nm and the Re/Rth ratio was 0.436.

The retardation (Re) of the alignment film was measured as follows. In other words, two polarizing plates were used to obtain a direction of the alignment main axis of the film, and a rectangular shape of 4 cm × 2 cm was cut out so as to be orthogonal to the main axis direction, and used as a sample for measurement. For this sample, by Abbe refractometer (ATAGO) Co., Ltd., NAR-4T) obtains the birefringent refractive index (Nx, Ny) and the refractive index (Nz) in the thickness direction at a wavelength of 589 nm, and obtains the absolute value of the biaxial refractive index difference. (|Nx-Ny|) is an anisotropy (ΔNxy) of the refractive index. The thickness d (nm) of the film was measured using an electronic micrometer (Miritoron 1245D, manufactured by Fine Liu Full Co., Ltd.), and the unit was converted to nm. The retardation (Re) was obtained from the product of the anisotropy of the refractive index (ΔNxy) and the thickness d (nm) of the film (ΔNxy×d).

Further, Nx, Ny, and Nz and the film thickness d (nm) were obtained by the same method as the measurement of the retardation, and an average value of (ΔNxz × d) and (ΔNyz × d) was calculated to obtain a thickness direction retardation ( Rth).

<Production of Transparent Resin Molded Body>

As the resin, a polycarbonate resin "CALIBRE 301-10" manufactured by Sumitomo Dow Co., Ltd. having a heat distortion temperature of 140 ° C was used. The resin was melt-kneaded in an extruder and supplied in the order of the supply portion and the mold. Then, the molten resin extruded from the mold was sandwiched between the first cooling roll and the second cooling roll disposed opposite each other, and molded and cooled to obtain a resin plate having a single layer thickness of 0.5 mm. This was used as a transparent resin molded body for the production of a laminated glass sheet.

The retardation (Re) of the transparent resin molded body was measured using KOBRA (21 ADH, manufactured by Oji Scientific Instruments Co., Ltd.), and the retardation value at a wavelength of 589 nm was measured.

<Production of laminated glass sheets>

The above-mentioned alignment film 1, 2, 3 or 4 is bonded to the one surface of the transparent resin molded body, and the resin laminated body is formed. Next, on the surface side of the alignment film stack of the resin laminate, an adhesive was placed, and a glass plate (thickness: 5 mm) was laminated to prepare a laminated glass. As a comparison object, making A laminated glass in which a glass sheet is directly laminated on a transparent resin molded body without using an alignment film.

<Evaluation test of stains>

In the plane of the laminated glass plate, a natural light LED (CCS, natural light LED EXLN-NW022050E11JW) is placed on one side of the surface to replace the sunlight, and the surface of the laminated glass plate is viewed from the front side and the oblique direction from the other surface side, and The evaluation criteria described below were evaluated. The laminated glass plate is disposed such that the glass plate is closer to the visible side than the transparent resin molded body.

<Evaluation criteria>

◎: No stain was observed.

○: Some slight spots were observed, but the visibility was not problematic.

×: Obvious spots were observed.

The evaluation results are shown in Table 1 below.

As shown in Table 1, it is confirmed that the laminated glass of the laminated film is not laminated. Significant color spots were observed, but the color spots were eliminated by any of the laminated alignment films 1 to 4. Further, when the alignment film 1 or 2 was used, it was confirmed that the color unevenness was more remarkably eliminated.

<Evaluation test of stains B>

The glass surface of the laminated glass plate is irradiated with light of a natural light LED (CCS, natural light LED EXLN-NW022050E11JW) instead of sunlight, and is partially covered by the glass plate surface in a direction inclined by 45 degrees with respect to the normal direction of the glass surface. In the state of the reflection, the surface of the laminated glass plate was observed from the front side and the oblique direction on the same side as the side of the natural light LED on the plane of the laminated glass plate, and the evaluation was performed in the same manner as in the evaluation test 1 of the above-described color spot. .

The evaluation results are shown in Table 2 below.

As shown in Table 2, it was confirmed that even when the glass surface of the laminated glass was incident on the sunlight in the oblique direction, the rainbow spot was observed when the laminated glass of the alignment film was not laminated. On the other hand, it is confirmed by lamination alignment Any of the films 1 to 4 can eliminate the stain. Further, when the alignment film 1 or 2 was used, it was confirmed that the color unevenness was more remarkably eliminated.

[Industrial availability]

For example, it can be suitably used for window materials such as general buildings and high-rise buildings, window coverings from roofs, covering materials for agricultural greenhouses, window materials such as automobiles and electric vehicles, and the like.

Claims (6)

A laminated glass sheet having an alignment film having a retardation of 3,000 or more and 150,000 nm or less, a transparent resin molded body, and a glass plate. The laminated glass sheet according to claim 1, wherein the transparent resin molded body is formed of at least one selected from the group consisting of an acrylic resin and a polycarbonate resin. The laminated glass sheet of claim 1 or 2, wherein the alignment film is a polyester film. The laminated glass sheet according to any one of claims 1 to 3, which is used for building materials. A laminated glass panel according to any one of claims 1 to 3, which is for use in a vehicle. A window glass having an alignment film having a retardation of 3,000 or more and 150,000 nm or less, a transparent resin molded body, and a glass plate.