JP6362500B2 - Interlayer film for laminated glass, laminated glass and vehicle - Google Patents

Description

The present invention does not emit light when exposed to light from the outside or inside of a vehicle by unintended light sources such as sunlight or other vehicle headlights, but emits light when illuminated by an information light source installed in the vehicle and contrasts. The present invention relates to an interlayer film for laminated glass capable of displaying a high-quality image, and a laminated glass and a vehicle using the interlayer film.

Laminated glass is safe because it does not scatter glass fragments even if it is damaged by an external impact, so it can be used as a windshield, side glass, rear glass for vehicles such as automobiles, and window glass for aircraft, buildings, etc. Widely used. As the laminated glass, for example, laminated glass in which an interlayer film for laminated glass including a polyvinyl butyral resin and a plasticizer is interposed between at least a pair of glasses is integrated.

2. Description of the Related Art In recent years, there has been a growing demand for a windshield for an automobile to display an instrument display such as speed information, which is automobile travel data, as a head-up display (HUD) within the same field of view as the windshield.
A number of forms have been developed as HUDs so far. By reflecting the speed information transmitted from the control unit as the most common HUD to the windshield from the display unit of the instrument panel, the driver can obtain the speed information at the same position as the windshield, that is, within the same field of view. There is a HUD that can be visually recognized.

As an interlayer film for laminated glass for HUD, for example, Patent Document 1 discloses a laminate having a light emitting layer containing a binder resin and at least one light emitting material selected from the group consisting of a light emitting particle, a light emitting pigment, and a light emitting dye. An interlayer film for glass is disclosed. In a laminated glass using such an interlayer film for laminated glass, a light emitting material emits light when irradiated with light from an information light source, and an image with high contrast can be displayed.

Japanese Patent Application Laid-Open No. 2014-024312

When the laminated glass provided with the interlayer film for laminated glass of Patent Document 1 is used as a HUD, in order to display an instrument display such as speed information that is automobile running data, a light beam is emitted from the information light source installed in the vehicle to the laminated glass. It is necessary to irradiate and excite the luminescent particles, luminescent pigment or luminescent dye to emit light. However, a light source other than the information light source installed in the vehicle, such as sunlight or a headlight of another vehicle, may be used as a light source to irradiate light rays that excite luminescent particles, luminescent pigments, or luminescent dyes. Sunlight and headlights of other vehicles may be emitted from the outside of the laminated glass or from the inside of the vehicle. When sunlight or other vehicle headlights are irradiated from the outside of the vehicle, most of the laminated glass emits light, obstructing the driver's field of view and causing an accident. It is necessary to prevent light emission due to such as. On the other hand, it is necessary to prevent the laminated glass from emitting light even when sunlight, headlights of other vehicles, etc. are irradiated from the inside of the vehicle.

In view of the above situation, the present invention does not emit light when exposed to light from the outside of the vehicle or from the inside of the vehicle using unintended light sources such as sunlight or headlights of other vehicles, and does not emit light from an information light source installed in the vehicle. It is an object of the present invention to provide an interlayer film for laminated glass that can emit light and display an image with high contrast, and a laminated glass and a vehicle using the interlayer film.

The present invention provides an excitation light shielding layer 1 comprising a light emitting layer containing a binder resin and a light emitting material, a binder resin disposed on one surface of the light emitting layer, and a light shielding agent for shielding excitation light from the light emitting material. And an excitation light shielding layer 2 including a binder resin disposed on the other surface of the light emitting layer and a light shielding agent for shielding excitation light of the light emitting material, and the light emitting material in the excitation light shielding layer 1 The interlayer film for laminated glass has a transmittance of excitation light higher than that of the light emitting material in the excitation light shielding layer 2.
The present invention is described in detail below.

As a result of intensive studies, the present inventor has excited light shielding layer 1 and excitation light shielding layer 2 containing a light shielding agent for shielding excitation light of the light emitting material on both sides of the light emitting layer containing the binder resin and the light emitting material. It has been found that a laminated glass that does not emit light can be obtained by irradiating light from the outside or inside of the vehicle with unintended light sources such as sunlight or other vehicle headlights.
The excitation light shielding layer 2 strongly shields the excitation light of the light emitting material, and arranges the laminated glass so that the excitation light shielding layer 2 is on the outside of the vehicle. The laminated glass is prevented from emitting light by an unintended light source such as a light.
The excitation light transmittance of the luminescent material in the excitation light shielding layer 1 is made higher than the transmittance of the excitation light of the luminescent material in the excitation light shielding layer 2. The excitation light shielding layer 1 shields the excitation light of the light emitting material, and arranges the laminated glass so that the excitation light shielding layer 1 is on the inside of the vehicle, so that sunlight from the inside of the vehicle and headlights of other vehicles can be provided. It reduces that the laminated glass emits light by an unintended light source such as. Here, the intensity of the light from the information light source installed in the vehicle is sufficiently higher than the intensity of the light from the light source such as sunlight reaching the ground surface or headlights of other vehicles. Therefore, the light from the information light source can be transmitted through the excitation light shielding layer 1 to cause the light emitting material contained in the light emitting layer to emit light, and an image with high contrast can be displayed.

The interlayer film for laminated glass of the present invention includes a light emitting layer and an excitation light shielding layer 1 and an excitation light shielding layer 2 disposed on both sides of the light emitting layer.
The light emitting layer has a role of displaying a high contrast image by emitting light from the light emitting material when irradiated with light from an information light source. On the other hand, the excitation light shielding layer 1 and the excitation light shielding layer 2 have a role of preventing the laminated glass from emitting light by unintended light sources such as sunlight from the outside and inside of the vehicle, and headlights of other vehicles.

The light emitting layer includes a binder resin and a light emitting material.
The binder resin is not particularly limited. For example, polyvinyl acetal resin, ethylene-vinyl acetate copolymer resin, ethylene-acrylic copolymer resin, polyurethane resin, polyurethane resin containing sulfur element, polyvinyl alcohol resin, vinyl chloride resin. And thermoplastic resins such as polyethylene terephthalate resin. Among these, when used in combination with a plasticizer, an interlayer film for laminated glass that exhibits excellent adhesion to glass can be obtained, and therefore, a polyvinyl acetal resin is preferable.

The polyvinyl acetal resin is not particularly limited as long as it is a polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol with an aldehyde, but a polyvinyl butyral resin is preferable. Moreover, you may use together 2 or more types of polyvinyl acetal resin as needed.

The preferable lower limit of the degree of acetalization of the polyvinyl acetal resin is 40 mol%, the preferable upper limit is 85 mol%, the more preferable lower limit is 60 mol%, and the more preferable upper limit is 75 mol%.
The said polyvinyl acetal resin has a preferable minimum of the amount of hydroxyl groups of 15 mol%, and a preferable upper limit of 35 mol%. Adhesiveness between the interlayer film for laminated glass and the glass is increased when the amount of the hydroxyl group is 15 mol% or more. When the hydroxyl group amount is 35 mol% or less, handling of the interlayer film for laminated glass becomes easy.
The degree of acetalization and the amount of hydroxyl groups can be measured in accordance with, for example, JIS K6728 “Testing method for polyvinyl butyral”.

The polyvinyl acetal resin can be prepared by acetalizing polyvinyl alcohol with an aldehyde.
The polyvinyl alcohol is usually obtained by saponifying polyvinyl acetate, and polyvinyl alcohol having a saponification degree of 70 to 99.8 mol% is generally used. The saponification degree of the polyvinyl alcohol is preferably 80 to 99.8 mol%.
The preferable lower limit of the polymerization degree of the polyvinyl alcohol is 500, and the preferable upper limit is 4000. When the polymerization degree of the polyvinyl alcohol is 500 or more, the penetration resistance of the obtained laminated glass is increased. When the polymerization degree of the polyvinyl alcohol is 4000 or less, the interlayer film for laminated glass can be easily molded. The minimum with a more preferable polymerization degree of the said polyvinyl alcohol is 1000, and a more preferable upper limit is 3600.

The aldehyde is not particularly limited, but generally an aldehyde having 1 to 10 carbon atoms is preferably used. The aldehyde having 1 to 10 carbon atoms is not particularly limited. For example, n-butyraldehyde, isobutyraldehyde, n-valeraldehyde, 2-ethylbutyraldehyde, n-hexylaldehyde, n-octylaldehyde, n-nonylaldehyde N-decylaldehyde, formaldehyde, acetaldehyde, benzaldehyde and the like. Of these, n-butyraldehyde, n-hexylaldehyde, and n-valeraldehyde are preferable, and n-butyraldehyde is more preferable. These aldehydes may be used alone or in combination of two or more.

The luminescent material is at least one selected from the group consisting of luminescent particles, luminescent pigments and luminescent dyes.
The luminescent particles and the luminescent pigment are, for example, Y ₂ O ₂ S: Eu, BaMg ₂ Al ₁₆ O ₂₇ : Eu, Mn, (SrCaBaMg) ₅ (PO ₄ ) ₃ Cl: Eu, BaMg ₂ Al ₁₆ O ₂₇ : _{Eu, BaMg 2 Al 16 O 27} : Eu, Mn, Sr 5 (PO 4) 3 Cl: Eu, LaPO 4: Ce, Tb, MgAl 11 O 19: Ce, Tb, Y 2 O 3: Eu, Y (PV ) O ₄ : Eu, 3.5MgO · 0.5MgF ₂ · GeO ₂ : Mn, Ca ₁₀ (PO ₄ ) ₆ FCl: Sb, Mn, Sr ₁₀ (PO ₄ ) ₆ FCl: Sb, Mn, (SrMg) ₂ P ₂ O ₇ : Eu, Sr ₂ P ₂ O ₇ : Eu, CaWO ₄ , CaWO ₄ : Pb, MgWO ₄ , (BaCa) ₅ (PO ₄ ) ₃ Cl: Eu, Sr ₄ Al ₁₄ Examples thereof include phosphors represented by O ₂₅ : Eu, Zn ₂ SiO ₄ : Mn, etc., composites composed thereof, and particle types such as ZnS particles, GaSe particles, SiC particles, and CdTe particles.

Examples of the luminescent dye include (carbazole-naphthalimide) dye, (acetonitrile-triphenyleneamine) dye, aryl sulfonate cyanine dye, perylene dye, coumarin dye, tris (4,4,4-trifluoro-1- (2- Thienyl) -1,3-butanedionate-O, O ′) bis (triphenylphosphine oxide-O—) europium and the like.

As the luminescent dye, a compound having a naphthalimide skeleton or a compound having a coumarin skeleton is preferable. A compound having a naphthalimide skeleton and a compound having a coumarin skeleton have a high affinity for a thermoplastic resin used as a binder resin, so that it can be uniformly dispersed in the binder resin, and has high transparency and low haze. An interlayer film for glass can be obtained. In addition, since a compound having a naphthalimide skeleton and a compound having a coumarin skeleton are extremely excellent in durability against ultraviolet rays, an interlayer film for laminated glass using the same can exhibit excellent light resistance.

Specific examples of the compound having the naphthalimide skeleton include 4-bromo-1,8-naphthalimide, 4-amino-1,8-naphthalimide, 4-methoxy-N-methylnaphthalimide, naphthalimide, 4-aminonaphthalimide, N-methyl-4-aminonaphthalimide, N-ethyl-4-aminonaphthalimide, N-propyl-4-aminonaphthalimide, Nn-butyl-4-aminonaphthalimide, 4- Acetylaminonaphthalimide, N-methyl-4-acetylaminonaphthalimide, N-ethyl-4-acetylaminonaphthalimide, N-propyl-4-acetylaminonaphthalimide, Nn-butyl-4-acetylaminonaphthalimide N-methyl-4-methoxynaphthalimide, N-ethyl-4-methoxynaphtha Imido, N-propyl-4-methoxynaphthalimide, Nn-butyl-4-methoxynaphthalimide, N-methyl-4-ethoxynaphthalimide, N-ethyl-4-ethoxynaphthalimide, N-propyl-4- Examples include ethoxynaphthalimide, Nn-butyl-4-ethoxynaphthalimide, Lumogen F Violet 570 (manufactured by BASF Japan), Lumogen F Blue 650 (manufactured by BASF Japan), and the like.

Specific examples of the compound having a coumarin skeleton include derivatives having an electron-donating substituent at the 7-position of the coumarin ring. More specifically, 3- (2′-benzothiazolyl) -7-diethylaminocoumarin (coumarin 6), 3- (2′-benzimidazolyl)-, which is a derivative having an amino group at the 7-position of the coumarin ring. 7-N, N-diethylaminocoumarin (coumarin 7), 3- (2′-N-methylbenzimidazolyl) -7-N, N-diethylaminocoumarin (coumarin 30), 2,3,5,6-1H, 4H -Coumarin dyes such as tetrahydro-8-trifluoromethylquinolidine (9,9a, 1-gh) coumarin (coumarin 153), coumarin dyes such as basic yellow 51, and having a hydroxy group at the 7-position of the coumarin ring 7-hydroxycoumarin, 3-cyano-7-hydroxycoumarin, 7-hydroxy-4-methylcoumarin, -Diethylamino-4-methylcoumarin, 7-dimethylaminocyclopenta [c] -coumarin, 1,2,4,5,3H, 6H, 10H-tetrahydro-8-methyl [1] benzopyrano [9,9a, 1- gH] quinolizin-10-one, 7-amino-4-trifluoromethylcoumarin, 1,2,4,5,3H, 6H, 10H-tetrahydro-9-cyano [1] benzopyrano [9,9a, 1-gH Quinolizin-10-one, 1,2,4,5,3H, 6H, 10H-tetrahydro-9-carbo-t-butoxy [1] benzopyrano [9,9a, 1-gH] quinolizin-10-one, 7 -Ethylamino-6-methyl-4-trifluoromethylcoumarin, 1,2,4,5,3H, 6H, 10H-tetrahydro-9-carboethoxy [1] benzopyrano 9,9a, 1-gH] quinolizin-10-one, 7-diethylamino-3- (1-methylbenzimidazolyl) coumarin, 7-dimethylamino-4-trifluoromethylcoumarin, 1,2,4,5,3H , 6H, 10H-tetrahydro-9-carboxy [1] benzopyrano [9,9a, 1-gH] quinolizin-10-one, 1,2,4,5,3H, 6H, 10H-tetrahydro-9-acetyl [1 ] Benzopyrano [9,9a, 1-gH] quinolizin-10-one, 3- (2-benzimidazolyl) -7-N, N-diethylaminocoumarin, 1,2,4,5,3H, 6H, 10H-tetrahydro -8-trifluoromethyl [1] benzopyrano [9,9a, 1-gH] quinolizin-10-one, 3- (2-benzothiazolyl) -7-diethylami Nocoumarin, 7-diethylaminocoumarin, 7-diethylamino-4-trifluoromethylcoumarin, 2,3,6,7-tetrahydro-9- (trifluoromethyl) -1H, 5H, 11H- [1] benzopyrano [6,7 , 8-ij] quinolizin-11-one, 7-amino-4-methylcoumarin, 4,6-dimethyl-7-ethylaminocoumarin, and the like.

As the light emitting material, a light emitting material having a terephthalic acid ester structure is preferably used. Examples of the light emitting material having the terephthalic acid ester structure include a compound having a structure represented by the following general formula (1) and a compound having a structure represented by the following general formula (2). These may be used alone or in combination of two or more.

In the general formula (1), R ¹ represents an organic group, and x is 1, 2, 3 or 4. Since the transparency of the interlayer film for laminated glass is further increased, x is preferably 1 or 2, more preferably a hydroxyl group at the 2-position or 5-position of the benzene ring, More preferably, it has a hydroxyl group at the 5-position.
The organic group for R ¹ is preferably a hydrocarbon group, more preferably a hydrocarbon group having 1 to 10 carbon atoms, still more preferably a hydrocarbon group having 1 to 5 carbon atoms, A hydrocarbon group having 1 to 3 carbon atoms is particularly preferable. When the hydrocarbon group has 10 or less carbon atoms, the light-emitting material having the terephthalate structure can be easily dispersed in the interlayer film for laminated glass. The hydrocarbon group is preferably an alkyl group.

Examples of the compound having the structure represented by the general formula (1) include diethyl-2,5-dihydroxyterephthalate, dimethyl-2,5-dihydroxyterephthalate, and the like. Among them, since a higher contrast image can be displayed, the compound having the structure represented by the general formula (1) is diethyl-2,5-dihydroxyterephthalate (“Diethyl 2,5-dihydroxyterephthalate” manufactured by Aldrich). ") Is preferred. For example, the compound having the structure represented by the general formula (1) can be easily excited by light having a wavelength of 405 nm.

In the general formula (2), R ² represents an organic group, R ³ and R ⁴ represent a hydrogen atom or an organic group, and y is 1, 2, 3, or 4.
The organic group represented by R ² is preferably a hydrocarbon group, more preferably a hydrocarbon group having 1 to 10 carbon atoms, still more preferably a hydrocarbon group having 1 to 5 carbon atoms, A hydrocarbon group having 1 to 3 carbon atoms is particularly preferable. When the carbon number of the hydrocarbon group is not more than the above upper limit, the light emitting material having the terephthalic acid ester structure can be easily dispersed in the interlayer film for laminated glass. The hydrocarbon group is preferably an alkyl group. In the general formula (2), NR ³ R ⁴ is an amino group. R ³ and R ⁴ are preferably hydrogen atoms. Of the hydrogen atoms of the benzene ring of the compound having the structure represented by the general formula (2), one hydrogen atom may be the amino group, and two hydrogen atoms may be the amino, Three hydrogen atoms may be the amino group, and four hydrogen atoms may be the amino group.

As the compound having the structure represented by the general formula (2), diethyl-2,5-diaminoterephthalate (manufactured by Aldrich) is preferable because an image with higher contrast can be displayed.

The content of the light emitting material in the light emitting layer is preferably 0.005 parts by weight with respect to 100 parts by weight of the binder resin, and 5 parts by weight with respect to the preferred upper limit. In order to obtain sufficient light emission, it is necessary to mix a certain amount or more of the light emitting material. On the other hand, if a large amount of the light emitting material is mixed, the light emitting property may be lowered. This is thought to be due to the concentration quenching phenomenon in which the energy absorbed is shifted to a non-radiation process in which light is not emitted due to the interaction of the excited light emitting material, and the light emission intensity is reduced. When the content of the light emitting material is within this range, light emission with sufficiently high contrast can be obtained when light having a specific wavelength is irradiated. The more preferable lower limit of the content of the light emitting material is 0.01 parts by weight, the more preferable upper limit is 3 parts by weight, the still more preferable lower limit is 0.05 parts by weight, and the still more preferable upper limit is 1 part by weight.

Regarding the content of the light emitting material in the light emitting layer, a preferable lower limit is 0.005 wt% and a preferable upper limit is 5 wt% in 100 wt% of the light emitting layer. When the content of the light emitting material is 0.005% by weight or more, an interlayer film for laminated glass capable of displaying an image with higher contrast can be obtained. When the content of the light emitting material is 5% by weight or less, an interlayer film for laminated glass having much higher transparency can be obtained. The more preferable lower limit of the content of the light emitting material is 0.01% by weight, the more preferable upper limit is 3% by weight, the still more preferable lower limit is 0.02% by weight, and the still more preferable upper limit is 1% by weight.

The light emitting layer preferably further contains a dispersant. By containing the dispersant, the light emitting material can be finely dispersed in the layer, and more uniform light emission can be achieved.
The dispersant is, for example, a compound having a sulfonic acid structure such as a linear alkylbenzene sulfonate, or an ester structure such as a diester compound, a ricinoleic acid alkyl ester, a phthalic acid ester, an adipic acid ester, a sebacic acid ester, or a phosphoric acid ester. , Compounds having an ether structure such as polyoxyethylene glycol, polyoxypropylene glycol and alkylphenyl-polyoxyethylene-ether, compounds having a carboxylic acid structure such as polycarboxylic acid, laurylamine, dimethyllauryl Compounds having an amine structure such as amines, oleylpropylenediamine, secondary amines of polyoxyethylene, tertiary amines of polyoxyethylene, and diamines of polyoxyethylene, and polyalkylenepolyaminealkyleneoxy A compound having a polyamine structure such as amide, a compound having an amide structure such as oleic acid diethanolamide, an alkanol fatty acid amide, a compound having a high molecular weight amide structure such as polyvinylpyrrolidone, a polyester acid amide amine salt, and the like, triethoxy Compounds having a silane structure having an alkyl group such as propyl isocyanate silane and triethoxybutyl silane, compounds having a silane structure having an acryloxy group such as triethoxypropyl acryloxy silane, and vinyl groups such as triethoxy propyl vinyl silane A compound having a silane structure, a compound having a polysiloxane structure which is a high molecular weight polymer having a side chain such as an epoxy group, a phosphate group, a carboxyl group, or a mercapto group, or having an isocyanate group such as isocyanate. And that compound may be a conventionally known dispersing agent such as a compound having an isocyanurate group such as isocyanurate. Moreover, you may use high molecular weight dispersing agents, such as polyoxyethylene alkyl ether phosphoric acid (salt), high molecular polycarboxylic acid, and condensed ricinoleic acid ester. The high molecular weight dispersant is defined as a dispersant having a molecular weight of 10,000 or more.

When the dispersant is blended, the preferred lower limit of the blending amount of the dispersant with respect to 100 parts by weight of the light emitting material in the light emitting layer is 1 part by weight, and the preferred upper limit is 50 parts by weight. When the blending amount of the dispersant is within this range, the light emitting material can be uniformly dispersed in the light emitting layer. The more preferable lower limit of the blending amount of the dispersant is 3 parts by weight, the more preferable upper limit is 30 parts by weight, the still more preferable lower limit is 5 parts by weight, and the still more preferable upper limit is 25 parts by weight.

The light emitting layer may further contain a plasticizer as necessary.
The plasticizer is not particularly limited, and examples thereof include organic ester plasticizers such as monobasic organic acid esters and polybasic organic acid esters, phosphoric acid plasticizers such as organic phosphoric acid plasticizers and organic phosphorous acid plasticizers, and the like. Is mentioned. The plasticizer is preferably a liquid plasticizer.

The monobasic organic acid ester is not particularly limited. For example, glycols such as triethylene glycol, tetraethylene glycol, and tripropylene glycol, butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptylic acid, and n-octyl Examples thereof include glycol esters obtained by reaction with monobasic organic acids such as acid, 2-ethylhexyl acid, pelargonic acid (n-nonyl acid), and decyl acid. Of these, triethylene glycol dicaproate, triethylene glycol di-2-ethylbutyrate, triethylene glycol di-n-octylate, triethylene glycol di-2-ethylhexylate and the like are preferable.

Although the said polybasic organic acid ester is not specifically limited, For example, ester compound of polybasic organic acid, such as adipic acid, sebacic acid, azelaic acid, and the alcohol which has a C4-C8 linear or branched structure Is mentioned. Of these, dibutyl sebacic acid ester, dioctyl azelaic acid ester, dibutyl carbitol adipic acid ester and the like are preferable.

The organic ester plasticizer is not particularly limited, and triethylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylhexanoate, triethylene glycol dicaprylate, triethylene glycol di-n-octanoate, Triethylene glycol di-n-heptanoate, tetraethylene glycol di-n-heptanoate, tetraethylene glycol di-2-ethylhexanoate, dibutyl sebacate, dioctyl azelate, dibutyl carbitol adipate, ethylene glycol di-2-ethyl Butyrate, 1,3-propylene glycol di-2-ethyl butyrate, 1,4-butylene glycol di-2-ethyl butyrate, diethylene glycol di-2-ethyl butyrate, diethylene glycol di- -Ethyl hexanoate, dipropylene glycol di-2-ethyl butyrate, triethylene glycol di-2-ethyl pentanoate, tetraethylene glycol di-2-ethyl butyrate, diethylene glycol dicapryate, dihexyl adipate, adipine Dioctyl acid, hexyl cyclohexyl adipate, diisononyl adipate, heptylnonyl adipate, dibutyl sebacate, oil-modified sebacic acid alkyd, a mixture of phosphate ester and adipic acid ester, adipic acid ester, alkyl alcohol having 4 to 9 carbon atoms and Examples thereof include mixed adipic acid esters prepared from cyclic alcohols having 4 to 9 carbon atoms and adipic acid esters having 6 to 8 carbon atoms such as hexyl adipate.

The organophosphate plasticizer is not particularly limited, and examples thereof include tributoxyethyl phosphate, isodecylphenyl phosphate, triisopropyl phosphate, and the like.

Furthermore, since it is difficult to cause hydrolysis as the plasticizer, triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethylbutyrate (3GH), tetraethylene glycol di-2- It preferably contains ethyl hexanoate (4GO) and dihexyl adipate (DHA), and tetraethylene glycol di-2-ethylhexanoate (4GO) and triethylene glycol di-2-ethylhexanoate (3GO). More preferably, it contains triethylene glycol di-2-ethylhexanoate, more preferably.

The content of the plasticizer in the light emitting layer is not particularly limited, but a preferable lower limit with respect to 100 parts by weight of the binder resin is 30 parts by weight, and a preferable upper limit is 90 parts by weight. When the content of the plasticizer is 30 parts by weight or more, the melt viscosity of the laminated glass interlayer film is lowered, and the degassing property when the laminated glass is produced using this laminated glass interlayer film is increased. When the content of the plasticizer is 90 parts by weight or less, the transparency of the interlayer film for laminated glass increases. The minimum with more preferable content of the said plasticizer is 35 weight part, a more preferable upper limit is 70 weight part, and a still more preferable upper limit is 63 weight part.

The light emitting layer may contain additives such as an antioxidant, a light stabilizer, and an antistatic agent as necessary.

Although the thickness of the said light emitting layer is not specifically limited, A preferable minimum is 50 micrometers and a preferable upper limit is 500 micrometers. When the thickness of the light emitting layer is within this range, light emission with sufficiently high contrast can be obtained when irradiated with light of a specific wavelength, and it is also suitable for uses such as an interlayer film for laminated glass. The more preferable lower limit of the thickness of the light emitting layer is 100 μm, and the more preferable upper limit is 300 μm.

The light emitting layer may be disposed on the entire horizontal surface of the interlayer film for laminated glass of the present invention, or may be disposed only on a part thereof. In the case where the light emitting layer is arranged only in part, information can be displayed only in the light emitting area, with the part as a light emitting area and the other part as a non-light emitting area.

The excitation light shielding layer 1 and the excitation light shielding layer 2 include a binder resin and a light shielding agent that shields the excitation light of the light emitting material (hereinafter also simply referred to as “light shielding agent”).
The binder resin contained in the excitation light shielding layer 1 and the excitation light shielding layer 2 can be the same as the binder resin contained in the light emitting layer.

The light shielding agent only needs to shield a light beam that excites the light emitting material, and can be appropriately selected according to the light emitting material. For example, when the wavelength of the light beam that excites the light emitting material is included in the range from the ultraviolet region to the visible region, an ultraviolet shielding agent can be used, and the wavelength of the light beam that excites the light emitting material ranges from the visible region to the infrared region. When included in the range, a heat ray shielding agent can be used. A light-emitting material having an emission wavelength in the visible region is preferably an ultraviolet shielding agent as the light shielding agent because the wavelength of the light to be excited is often in the range from the ultraviolet region to the visible region.

The ultraviolet shielding agent is preferably an ultraviolet absorber.
Examples of the ultraviolet absorber include a compound having a malonic ester structure, a compound having an oxalic acid anilide structure, a compound having a benzotriazole structure, a compound having a benzophenone structure, a compound having a triazine structure, a compound having a benzoate structure, and a hindered amine A conventionally well-known ultraviolet absorber, such as a compound having a structure, may be mentioned.

The content of the light shielding agent in the excitation light shielding layer 1 and the excitation light shielding layer 2 is preferably 0.01 parts by weight with respect to 100 parts by weight of the binder resin, and more preferably 1 part by weight. The lower limit is 0.05 parts by weight, the more preferred upper limit is 0.5 parts by weight, the still more preferred upper limit is 0.2 parts by weight, and the particularly preferred upper limit is 0.1 parts by weight.

The excitation light shielding layer 1 and the excitation light shielding layer 2 preferably contain an adhesive force adjusting agent.
The adhesive strength adjusting agent is not particularly limited, and is preferably a metal salt, and is preferably at least one metal salt selected from the group consisting of alkali metal salts, alkaline earth metal salts, and Mg salts.
The metal salt preferably contains at least one metal selected from K and Mg. The metal salt is more preferably an alkali metal salt of an organic acid having 2 to 16 carbon atoms or an alkaline earth metal salt of an organic acid having 2 to 16 carbon atoms, and a magnesium carboxylate having 2 to 16 carbon atoms or More preferably, it is a carboxylic acid potassium salt having 2 to 16 carbon atoms. Although it does not specifically limit as said C2-C16 carboxylic acid magnesium salt and said C2-C16 carboxylic acid potassium salt, For example, magnesium acetate, potassium acetate, magnesium propionate, potassium propionate, 2-ethylbutanoic acid Examples include magnesium, potassium 2-ethylbutanoate, magnesium 2-ethylhexanoate, and potassium 2-ethylhexanoate.

Although content of the said adhesive force regulator is not specifically limited, The preferable minimum with respect to 100 weight part of said binder resins is 0.0005 weight part, and a preferable upper limit is 0.05 weight part. The penetration resistance of laminated glass becomes high as content of the said adhesive force regulator is 0.0005 weight part or more. When the content of the adhesive strength adjusting agent is 0.05 parts by weight or less, the transparency of the light emitting sheet is increased. The minimum with more preferable content of the said adhesive force regulator is 0.002 weight part, and a more preferable upper limit is 0.02 weight part.

The excitation light shielding layer 1 and the excitation light shielding layer 2 may contain additives such as an antioxidant, a light stabilizer, and an antistatic agent as necessary.

The excitation light transmittance of the light emitting material in the excitation light shielding layer 1 is higher than the transmittance of the excitation light of the light emitting material in the excitation light shielding layer 2. Accordingly, by arranging the laminated glass so that the excitation light shielding layer 1 is on the inside of the vehicle and the excitation light shielding layer 2 is on the outside of the vehicle, intentions such as sunlight from the outside of the vehicle and headlights of other vehicles can be obtained. The excitation light shielding layer 2 shields the light from the light source that does not light and prevents the laminated glass from emitting light, and shields the light from the unintended light source such as sunlight from the inside of the vehicle and headlights of other vehicles. While the layer 1 is shielded and the laminated glass emits light, the light from the information light source installed in the vehicle can pass through the excitation light shielding layer 1 and display an image with high contrast.
The difference in the transmittance of the excitation light is preferably 1% or more, more preferably 3% or more, further preferably 5% or more, and particularly preferably 6% or more. The difference in the transmittance of the excitation light is preferably 25% or less, more preferably 20% or less, further preferably 15% or less, and particularly preferably 10% or less. .

In the present specification, the transmittance of the light emitting material for excitation light means the transmittance at the maximum absorption wavelength of the light emitting material. However, when the information light source for exciting the light emitting material is determined, the information light source It is also possible to use the transmittance at the wavelength at which the spectrum peaks.
For example, when the light emitting material having the terephthalic acid ester structure is employed as the light emitting material, the light emitting material having the terephthalic acid ester structure is excited by irradiation with light having a wavelength of 405 nm. An information light source that emits light having a wavelength of 405 nm is used as the light. Therefore, the transmittance of light having a wavelength of 405 nm in the excitation light shielding layer 1 is set to be higher than the transmittance of light having a wavelength of 405 nm in the excitation light shielding layer 2.

The excitation light shielding layer 1 is sandwiched between a pair of clear glass with a thickness of 2.5 mm to form a laminated glass, and the obtained laminated glass is 300 using a self-recording spectrophotometer (for example, “U4100” manufactured by Hitachi, Ltd.). When the transmittance of light of ˜2500 nm is measured, the transmittance of excitation light of the light emitting material is preferably 85% or less, more preferably 80% or less, and further preferably 75% or less. preferable. The excitation light transmittance of the light emitting material of the excitation light shielding layer 1 is preferably 60% or more, and more preferably 65% or more.

The excitation light shielding layer 2 is sandwiched between a pair of 2.5 mm thick clear glass to form a laminated glass, and the obtained laminated glass is 300 using a self-recording spectrophotometer (for example, “U4100” manufactured by Hitachi, Ltd.). When the transmittance of light of ˜2500 nm is measured, the transmittance of excitation light of the light emitting material is preferably 72% or less, more preferably 70% or less, and even more preferably 68% or less. preferable. The excitation light transmittance of the light emitting material of the excitation light shielding layer 1 is preferably 40% or more, and more preferably 50% or more.

As a method for adjusting the transmittance of the excitation light of the luminescent material in the excitation light shielding layer 1 and the excitation light shielding layer 2, the content of the light shielding agent in the excitation light shielding layer 1 is changed in the excitation light shielding layer 2. Examples thereof include a method of lowering the content of the light shielding agent and a method of making the excitation light shielding layer 2 thicker than the excitation light shielding layer 1.

Although the thickness of the said excitation light shielding layer 1 and the excitation light shielding layer 2 is not specifically limited, A preferable minimum is 200 micrometers and a preferable upper limit is 600 micrometers. When the thicknesses of the excitation light shielding layer 1 and the excitation light shielding layer 2 are within this range, the laminated glass emits light by unintended light sources such as sunlight from the outside and inside of the vehicle and headlights of other vehicles. This can be sufficiently prevented. A more preferred lower limit of the thickness of the excitation light shielding layer 1 and the excitation light shielding layer 2 is 300 μm, and a more preferred upper limit is 500 μm. It does not emit light when exposed to light from the outside or inside of the vehicle due to unintentional light sources such as sunlight or other vehicle headlights, but it emits light when illuminated by an information light source installed in the vehicle, providing even more contrast. The excitation light shielding layer 2 is preferably 50 μm or more thicker than the excitation light shielding layer 1, more preferably 80 μm or more, and particularly preferably 150 μm or more because a high image can be displayed.

The excitation light shielding layer 1 may be directly laminated on one surface of the light emitting layer, or another layer may be disposed between the excitation light shielding layer 1 and the light emitting layer.
The excitation light shielding layer 2 may be directly laminated on the other surface of the light emitting layer, or another layer may be disposed between the excitation light shielding layer 2 and the light emitting layer.

In order to display an image with a higher contrast, it is preferable to control that the light emitting material moves from the light emitting layer to the excitation light shielding layer 1 and the excitation light shielding layer 2. As a method for controlling the transition of the light emitting material contained in the light emitting layer to the excitation light shielding layer 1 and the excitation light shielding layer 2, the compatibility between the binder resin contained in the light emitting layer and the light emitting material is determined based on the excitation. The method (method 1) which makes it higher than the compatibility of binder resin and luminescent material contained in the light shielding layer 1 and the excitation light shielding layer 2 is mentioned. Further, when the light emitting layer, the excitation light shielding layer 1 and the excitation light shielding layer 2 contain a binder resin and a plasticizer, the compatibility between the plasticizer and the light emitting material contained in the light emitting layer is determined by the excitation light shielding layer. 1 and the method (method 2) for increasing the compatibility between the plasticizer and the light emitting material contained in the excitation light shielding layer 2 and the plastic material contained in the light emitting layer because the light emitting material is considered to migrate together with the plasticizer. Examples include a method (method 3) for controlling the agent to migrate to the excitation light shielding layer 1 and the excitation light shielding layer 2.
In addition, in this specification, compatibility means the ease of mixing of different components.

The excitation light shielding layer 1, the light emitting layer and the excitation light shielding layer 2 are laminated in this order, and the light emitting layer, the excitation light shielding layer 1 and the excitation light shielding layer 2 contain a polyvinyl acetal resin and a plasticizer. The above methods 1 to 3 will be described more specifically.

In the above method 1, the compatibility between the polyvinyl acetal resin and the light emitting material can be appropriately set by adjusting the amount of hydroxyl groups of the polyvinyl acetal resin. When the light emitting material has hydrophobicity, the amount of hydroxyl groups of the polyvinyl acetal resin contained in the light emitting layer is preferably lower than the amount of hydroxyl groups of the polyvinyl acetal resins contained in the excitation light shielding layer 1 and the excitation light shielding layer 2. When the luminescent material has hydrophilicity, the amount of hydroxyl groups of the polyvinyl acetal resin contained in the light emitting layer is preferably higher than the amount of hydroxyl groups of the polyvinyl acetal resins contained in the excitation light shielding layer 1 and the excitation light shielding layer 2. . The preferable lower limit of the absolute value of the difference between the hydroxyl group amount of the polyvinyl acetal resin contained in the light emitting layer and the hydroxyl group amount of the polyvinyl acetal resin contained in the excitation light shielding layer 1 and the excitation light shielding layer 2 is 1 mol%, and a preferred upper limit. Is 20 mol%, a more preferred lower limit is 3 mol%, a more preferred upper limit is 15 mol%, a still more preferred lower limit is 5 mol%, and a still more preferred upper limit is 10 mol%.

In the method 2, the compatibility between the plasticizer and the light emitting material can be appropriately set by adjusting the plasticizer contained in the light emitting layer, the excitation light shielding layer 1 and the excitation light shielding layer 2. For example, the plasticizer contained in the light emitting layer is different from the plasticizer contained in the excitation light shielding layer 1 and the excitation light shielding layer 2, and the compatibility between the plasticizer contained in the light emitting layer and the light emitting material is high. The compatibility between the plasticizer and the light emitting material contained in the excitation light shielding layer 1 and the excitation light shielding layer 2 is preferably higher. When the light emitting material has hydrophobicity, the plasticizer contained in the light emitting layer is preferably higher in hydrophobicity than the plasticizer contained in the excitation light shielding layer 1 and the excitation light shielding layer 2. When the light emitting material has hydrophilicity, the plasticizer included in the light emitting layer is preferably more hydrophilic than the plasticizer included in the excitation light shielding layer 1 and the excitation light shielding layer 2.

In the method 3, the migration of the plasticizer can be appropriately set by adjusting the hydroxyl group amount of the polyvinyl acetal resin contained in the light emitting layer, the excitation light shielding layer 1 and the excitation light shielding layer 2. In order to prevent migration of the plasticizer, the amount of hydroxyl groups in the polyvinyl acetal resin contained in the light emitting layer is preferably lower than the amount of hydroxyl groups in the polyvinyl acetal resins contained in the excitation light shielding layer 1 and the excitation light shielding layer 2. . In particular, when the plasticizer has hydrophobicity, the plasticizer contained in the light emitting layer can be suppressed from moving to the excitation light shielding layer 1 and the excitation light shielding layer 2, so that an image is displayed with a higher contrast. An interlayer film for laminated glass can be obtained. The amount of hydroxyl groups in the polyvinyl acetal resin contained in the light emitting layer is preferably 1 mol% or more lower than the amount of hydroxyl groups in the polyvinyl acetal resins contained in the excitation light shielding layer 1 and the excitation light shielding layer 2, preferably 3 mol% or more. It is more preferably low, more preferably 5 mol% or less, and particularly preferably 7 mol% or less. The difference between the amount of hydroxyl groups of the polyvinyl acetal resin contained in the light emitting layer and the amount of hydroxyl groups of the polyvinyl acetal resins contained in the excitation light shielding layer 1 and the excitation light shielding layer 2 is preferably 20 mol% or less, 15 More preferably, it is at most 10 mol%, more preferably at most 10 mol%.

By selecting a combination of a binder resin and a plasticizer contained in the light emitting layer, the excitation light shielding layer 1 and the excitation light shielding layer 2, it is possible to impart various performances to the resulting interlayer film for laminated glass. .
For example, by making the content of the plasticizer contained in the light emitting layer greater than the content of the plasticizer contained in the excitation light shielding layer 1 and the excitation light shielding layer 2, the interlayer film for laminated glass of the present invention Sound insulation performance can be imparted to. Specifically, high sound insulation can be imparted by setting the difference in the plasticizer content to preferably 5 parts by weight or more, more preferably 10 parts by weight or more, and even more preferably 15 parts by weight or more. it can. The difference in content of the plasticizer is preferably 50 parts by weight or less, more preferably 40 parts by weight or less, and still more preferably 35 parts by weight or less.

The method for producing the interlayer film for laminated glass of the present invention is not particularly limited. For example, a plasticizer solution containing a plasticizer and a light emitting material and a binder resin are sufficiently mixed to produce a resin composition for forming the light emitting layer. Next, a resin composition for forming the excitation light shielding layer 1 and the excitation light shielding layer 2 by sufficiently mixing a plasticizer solution containing an adhesive force adjusting agent, a plasticizer and a light shielding agent, and a binder resin. Is made. The resin composition for forming the light emitting layer and the resin composition for forming the excitation light shielding layer 1 and the excitation light shielding layer 2 are coextruded using a co-extruder, and the excitation light shielding layer is formed. 1. An interlayer film for laminated glass in which a light emitting layer and an excitation light shielding layer 2 are laminated in this order can be produced. Moreover, after preparing each layer separately, it can also manufacture by the method of carrying out heat lamination and laminating | stacking.

Since the interlayer film for laminated glass of the present invention has the light emitting layer, it emits light when irradiated with light of a specific wavelength. By utilizing this property, it is possible to display information with higher contrast than HUD.
As an apparatus for irradiating light of the specific wavelength, for example, a spot light source (manufactured by Hamamatsu Photonics Co., LC-8), a xenon flash lamp (manufactured by Heraeus Co., CW lamp), a black light (Seiei Inai Co., Ltd.) Manufactured, carry hand) and the like.

Moreover, although the said specific wavelength light is not specifically limited, It is preferable that the wavelength range contains 350-420 nm light, and it is more preferable that the wavelength range contains 365-410 nm light. For example, a head-up display device can be obtained using a laminated glass in which the interlayer film for laminated glass of the present invention is sandwiched between a pair of glass plates and a light source that generates light having a wavelength range of 365 to 410 nm. .
Moreover, although the said specific wavelength light is not specifically limited, It is preferable that a wavelength range contains 350-410 nm light, and it is more preferable that a wavelength range contains 350-405 nm light. For example, a head-up display device can be obtained using a laminated glass in which the interlayer film for laminated glass of the present invention is sandwiched between a pair of glass plates and a light source that generates light having a wavelength range of 350 to 405 nm. .

The use of the interlayer film for laminated glass of the present invention is not particularly limited, and can be used for applications such as window materials for commercial buildings and houses, advertisement media attached to automobile windows, and the like. Especially, it is suitable as an interlayer film for laminated glass having an information display function in window materials for vehicles, window materials for buildings, and the like.

A laminated glass in which the interlayer film for laminated glass of the present invention is sandwiched between a pair of glass plates is also one aspect of the present invention.
The said glass plate can use the transparent plate glass generally used. Examples thereof include inorganic glass such as float plate glass, polished plate glass, template plate glass, lined plate glass, colored plate glass, heat ray absorbing glass, heat ray reflective glass, and green glass. Further, an ultraviolet shielding glass having an ultraviolet shielding coating layer formed on the glass surface can also be used. Furthermore, organic plastics plates such as polyethylene terephthalate, polycarbonate, and polyacrylate can also be used.
Two or more types of glass plates may be used as the glass plate. For example, the laminated glass which pinched | interposed the intermediate film for laminated glasses of this invention with the transparent float plate glass and the colored glass plate like green glass is mentioned. Moreover, you may use the glass plate from which 2 or more types of thickness differs as said glass plate.

When the laminated glass of the present invention is used as a window material for a vehicle, the laminated glass is formed such that the excitation light shielding layer 1 of the interlayer film for laminated glass of the present invention is on the vehicle interior side and the excitation light shielding layer 2 is on the vehicle exterior side. Place.
A vehicle having the laminated glass of the present invention, in which the excitation light shielding layer 1 of the interlayer film for laminated glass is disposed on the vehicle interior side and the excitation light shielding layer 2 is disposed on the vehicle exterior side, is also one of the present inventions. It is.

According to the present invention, light is not emitted by light irradiation from the outside or the inside of the vehicle by unintended light sources such as sunlight or other vehicle headlights, but is emitted by light irradiation from an information light source installed in the vehicle. In addition, an interlayer film for laminated glass capable of displaying an image with high contrast, and a laminated glass and a vehicle using the interlayer film can be provided.

Hereinafter, embodiments of the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples.

Example 1
(1) Preparation of light-emitting layer To 60 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO), 1.5 parts by weight of diethyl 2,5-dihydroxyterephthalate (manufactured by Aldrich) was added as a light-emitting material, A luminescent solution was prepared.
By fully kneading the total amount of the obtained luminescent solution and 100 parts by weight of polyvinyl butyral resin (acetyl group amount 12.5 mol%, hydroxyl group amount 23.3 mol%, average polymerization degree 3000) with a mixing roll, the luminescent layer A resin composition was obtained.
The obtained resin composition for a light emitting layer was sandwiched between polytetrafluoroethylene (PTFE) sheets, and pressed with a hot press through a spacer having a thickness of 100 μm for 15 minutes under conditions of 150 ° C. and 100 kg / cm ^2. A light emitting layer having a thickness of 110 μm was obtained.

(2) Production of Excitation Light Shielding Layer 1 and Excitation Light Shielding Layer 2 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) and Tinuvin 326 (“T326” manufactured by BASF) as an ultraviolet absorber .2 parts by weight of a mixture of magnesium acetate and magnesium 2-ethylbutyrate (magnesium acetate: magnesium 2-ethylbutyrate = 50% by weight: 50% by weight) as an adhesion modifier Then, a plasticizer solution was prepared.
Excitation light shielding is achieved by thoroughly kneading the total amount of the obtained plasticizer solution and 100 parts by weight of polyvinyl butyral resin (acetyl group content 0.9 mol%, hydroxyl group content 30 mol%, average polymerization degree 1700) with a mixing roll. A layer resin composition was prepared.

The obtained resin composition for the excitation light shielding layer was sandwiched between polytetrafluoroethylene (PTFE) sheets and pressurized with a hot press through a 300 μm thick spacer at 150 ° C. and 100 kg / cm ² for 15 minutes. The excitation light shielding layer 1 having a thickness of 310 μm was obtained. Similarly, the obtained resin composition for an excitation light shielding layer is sandwiched between polytetrafluoroethylene (PTFE) sheets, and is heated by a hot press through a spacer having a thickness of 400 μm under the conditions of 150 ° C. and 100 kg / cm ^2. Pressurization was performed for a minute to obtain an excitation light shielding layer 2 having a thickness of 405 μm.

(3) Production of interlayer film for laminated glass The excitation light shielding layer 1, the light emitting layer, and the excitation light shielding layer 2 are laminated in this order, and are heated at 150 ° C. and 100 kg / cm ² by a hot press through a spacer having a thickness of 800 μm. The film was pressed for 15 minutes to obtain an interlayer film for laminated glass having a thickness of 800 μm. In addition, the thickness of the excitation light shielding layer 1, the light emitting layer, and the excitation light shielding layer 2 in the obtained interlayer film for laminated glass was 300 μm, 100 μm, and 400 μm, respectively.

(4) Manufacture of laminated glass The obtained light-emitting sheet was cut into a size of 5 cm in length and 5 cm in width, and this was used as an interlayer film for laminated glass. The interlayer film for laminated glass was sandwiched and laminated by a pair of clear glass having a length of 5 cm and a width of 5 cm. The obtained laminate was vacuum-pressed while being held at 90 ° C. for 30 minutes with a vacuum laminator to be pressure-bonded. After the pressure bonding, pressure bonding was performed for 20 minutes using an autoclave under conditions of 140 ° C. and 14 MPa to obtain a laminated glass.

(Example 2)
An interlayer film for laminated glass and laminated glass were obtained in the same manner as in Example 1 except that the thicknesses of the excitation light shielding layer 1 and the excitation light shielding layer 2 were as shown in Table 1.

(Evaluation)
The interlayer film for laminated glass and laminated glass obtained in the examples were evaluated by the following methods.
The results are shown in Table 1.

(1) Evaluation of transmittance of excitation light of luminescent material in excitation light shielding layer About excitation light shielding layer 1 and excitation light shielding layer 2, each film is used as laminated glass, and a self-recording spectrophotometer is used for the obtained laminated glass. (The transmittance | permeability of 405 nm when measuring the 300-2500 nm transmittance | permeability using Hitachi, Ltd. "U4100") was measured.
Further, after the interlayer film for laminated glass was prepared as described above, it was peeled off again for each layer, and the laminated glass was made again, and the transmittance was measured by the same method. As a result, the transmittance was not changed before and after lamination.

(2) Evaluation of luminous property by light of information light source from excitation light shielding layer 1 side In a dark room, the obtained laminated glass is a High Power xenon light source (manufactured by Asahi Spectroscope, product number REX-250, irradiation wavelength 405 nm, intensity 100 mW). / Cm ² ), the entire surface of the laminated glass was irradiated with light from the excitation light shielding layer 1 side. When visually observed, the case where light emission at the center of the laminated glass was confirmed was evaluated as “◯”, and the case where light emission was not confirmed was evaluated as “x”.

(3) Evaluation of light shielding property of unintended light source from excitation light shielding layer 2 side Under the dark room, the obtained laminated glass is a High Power xenon light source (manufactured by Asahi Spectroscope, product number REX-250, irradiation wavelength 405 nm, intensity 15 mW / cm ² ), the entire surface of the laminated glass was irradiated with light from the excitation light shielding layer 2. When visually observed, the case where the light emission in the central portion of the laminated glass was not confirmed was evaluated as “◯”, and the case where the light emission was confirmed was evaluated as “x”.

According to the present invention, light is not emitted by light irradiation from the outside or the inside of the vehicle by unintended light sources such as sunlight or other vehicle headlights, but is emitted by light irradiation from an information light source installed in the vehicle. In addition, an interlayer film for laminated glass capable of displaying an image with high contrast, and a laminated glass and a vehicle using the interlayer film can be provided.

Claims (7)

A light emitting layer including a binder resin and a light emitting material; an excitation light shielding layer including a binder resin disposed on one surface of the light emitting layer; and a light shielding agent for shielding excitation light of the light emitting material; An excitation light shielding layer 2 including a binder resin disposed on the other surface of the layer and a light shielding agent that shields excitation light of the light emitting material, and the excitation light of the light emitting material in the excitation light shielding layer 1 is provided. An interlayer film for laminated glass, wherein the transmittance is higher than the transmittance of excitation light of the light emitting material in the excitation light shielding layer 2. 2. The interlayer film for laminated glass according to claim 1, wherein a difference in transmittance of excitation light of the light emitting material between the excitation light shielding layer 1 and the excitation light shielding layer 2 is 1% or more. The interlayer film for laminated glass according to claim 1 or 2, wherein the luminescent material is a luminescent material having a terephthalic acid ester structure. The interlayer film for laminated glass according to claim 1, 2, or 3, wherein the light shielding agent for shielding excitation light of the light emitting material is an ultraviolet absorber. The binder resin contained in the light emitting layer, the excitation light shielding layer 1 and the excitation light shielding layer 2 is a polyvinyl acetal resin, respectively, and the hydroxyl group amount of the polyvinyl acetal resin contained in the light emitting layer is such that the excitation light shielding layer 1 and the above 5. The interlayer film for laminated glass according to claim 1, wherein the interlayer film is lower than the amount of hydroxyl groups of the polyvinyl acetal resin contained in the excitation light shielding layer 2. A laminated glass, wherein the interlayer film for laminated glass according to claim 1, 2, 3, 4 or 5 is sandwiched between a pair of glass plates. A vehicle comprising the laminated glass according to claim 6, wherein the excitation light shielding layer 1 of the interlayer film for laminated glass is disposed on the vehicle interior side, and the excitation light shielding layer 2 is disposed on the vehicle exterior side.