Interlayer film for laminated glass, and laminated glass

Abstract

The present invention aims to provide an interlayer film for laminated glass which prevents a double image phenomenon in a specific area of laminated glass and enables display of high contrast images at a luminance within a certain range. The present invention also aims to provide a laminated glass including the interlayer film for laminated glass. The present invention relates to an interlayer film for laminated glass, having a multilayer structure including a luminescent layer and a resin layer on at least one surface of the luminescent layer. The luminescent layer contains a thermoplastic resin, a plasticizer, and a luminescent material. The resin layer contains a thermoplastic resin and a plasticizer. The interlayer film for laminated glass has a wedge-shaped cross-sectional shape. The luminescent layer has a difference between the maximum thickness and the minimum thickness of 100 m or less.

Claims

1. An interlayer film for laminated glass, having a multilayer structure comprising: a luminescent layer comprising a thermoplastic resin, a plasticizer and a luminescent material; and a resin layer comprising a thermoplastic resin and a plasticizer on at least one surface of the luminescent layer, wherein the amount of the luminescent material in the luminescent layer is 0.005 to 5 parts by weight based on 100 parts by weight of the thermoplastic resin, the interlayer film for laminated glass has a wedge-shaped cross-sectional shape, and the luminescent layer has a difference between a maximum thickness and a minimum thickness of 100 m or less.

2. The interlayer film for laminated glass according to claim 1, wherein the interlayer film for laminated glass has a wedge-shaped cross-sectional shape with a wedge angle of 0.1 to 1 mrad.

3. The interlayer film for laminated glass according to claim 1, wherein each of the thermoplastic resins contained in the luminescent layer and the resin layer is a polyvinyl acetal resin.

4. The interlayer film for laminated glass according to claim 3, wherein the polyvinyl acetal resin contained in the luminescent layer has a lower hydroxy group content than the polyvinyl acetal resin contained in the resin layer.

5. A laminated glass, comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 1 between the glass sheets.

6. The interlayer film for laminated glass according to claim 2, wherein each of the thermoplastic resins contained in the luminescent layer and the resin layer is a polyvinyl acetal resin.

7. The interlayer film for laminated glass according to claim 6, wherein the polyvinyl acetal resin contained in the luminescent layer has a lower hydroxy group content than the polyvinyl acetal resin contained in the resin layer.

8. A laminated glass, comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 2 between the glass sheets.

9. A laminated glass, comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 3 between the glass sheets.

10. A laminated glass, comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 6 between the glass sheets.

11. A laminated glass, comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 4 between the glass sheets.

12. A laminated glass, comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 7 between the glass sheets.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a schematic view illustrating an exemplary embodiment of the interlayer film for laminated glass of the present invention.

(2) FIG. 2 is a schematic view illustrating an exemplary embodiment of the interlayer film for laminated glass of the present invention.

(3) FIG. 3 is a schematic view illustrating an exemplary embodiment of the interlayer film for laminated glass of the present invention.

DESCRIPTION OF EMBODIMENTS

(4) Embodiments of the present invention will be further described below with reference to examples. The present invention is not limited to the examples.

Example 1

(5) (1) Preparation of Resin Composition for Luminescent Layer

(6) To 60 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) was added 1.5 parts by weight of diethyl-2,5-dihydroxyterephthalate (diethyl 2,5-dihydroxyterephthalate, available from Aldrich), which was a compound represented by Formula (1), as a luminescent material. Thus, a luminescent plasticizer solution was prepared. Separately, polyvinyl butyral (acetyl group content: 12.5 mol %, hydroxy group content: 23.6 mol %, degree of butyralization: 63.9 mol %) was obtained by acetalizing polyvinyl alcohol having a degree of polymerization of 2300 with n-butyraldehyde. All of the obtained plasticizer solution and 100 parts by weight of the polyvinyl butyral were sufficiently kneaded with a mixing roll to prepare a resin composition for a luminescent layer.

(7) (2) Preparation of Resin Composition for Shape-Adjusting Layer

(8) Magnesium acetate as an adhesion modifier was added to 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO), whereby a plasticizer solution was prepared. Separately, polyvinyl butyral (acetyl group content: 0.9 mol %, hydroxy group content: 30.0 mol %, degree of butyralization: 69.1 mol %) was prepared by acetalizing polyvinyl alcohol having a degree of polymerization of 1700 with n-butyraldehyde. All of the obtained plasticizer solution and 100 parts by weight of the polyvinyl butyral were sufficiently kneaded with a mixing roll to prepare a resin composition for a shape-adjusting layer.

(9) The magnesium acetate was added to the triethylene glycol di-2-ethylhexanoate (3GO) in such an amount that the shape-adjusting layer had a magnesium element concentration of 70 ppm.

(10) (3) Preparation of Interlayer Film for Laminated Glass

(11) The resin composition for a luminescent layer and resin composition for a shape-adjusting layer obtained above were co-extruded with extruders to prepare a three-layer interlayer film for laminated glass as shown in FIG. 3, in which a shape-adjusting layer, a luminescent layer, and another shape-adjusting layer were laminated in the stated order.

(12) The shortest distance between a first end and a second end in the direction perpendicular to the extrusion direction of the obtained interlayer film was 1 m.

(13) The luminescent layer of the obtained interlayer film for laminated glass had a wedge-shaped cross-sectional shape with a minimum thickness of 90 m and a maximum thickness of 140 m. The entire interlayer film for laminated glass had a wedge-shaped cross-sectional shape with a minimum thickness of 800 m and a maximum thickness of 1200 m. The first end of the interlayer film for laminated glass had the minimum thickness and the second end had the maximum thickness. The minimum and maximum thicknesses were measured by observation with a light microscope.

(14) (4) Preparation of Laminated Glass

(15) The obtained interlayer film was interposed between two transparent float glass sheets (1000 mm long300 mm wide2.5 mm thick) to prepare a laminate. The laminate was temporarily pressure-bonded with heating rolls at 230 C. The temporarily pressure-bonded laminate was pressure-bonded using an autoclave by a heating roll method at 135 C. and 1.2 MPa for 20 minutes to prepare a laminated glass (1000 mm long300 mm wide).

(16) (5) Preparation of Laminated Glass for Luminance Measurement

(17) A piece (thin portion) having a size of 10 cm long10 cm wide was cut out of the interlayer film such that the center of the piece was at a point on the shortest line between the first and second ends and 10 cm away from the first end. Similarly, a piece (thick portion) having a size of 10 cm long10 cm wide was cut out of the interlayer film such that the center of the piece was at a point on the shortest line between the first and second ends and 10 cm away from the second end.

(18) Each of the pieces (the thin portion and the thick portion) of the interlayer film was interposed between two transparent float glass sheets (100 mm long100 mm wide2.5 mm thick) to prepare a laminate. The laminate was temporarily pressure-bonded with heating rolls at 230 C. The temporarily pressure-bonded laminate was then pressure-bonded by a heating roll method with an autoclave at 135 C. and 1.2 MPa for 20 minutes to prepare a laminated glass (100 mm long100 mm wide) for luminance measurement.

Examples 2 and 3

(19) An interlayer film for laminated glass and laminated glasses were obtained in the same manner as in Example 1, except that the kind of the luminescent material and the maximum and minimum thicknesses in the thickness direction of the luminescent layer were changed as shown in Table 1.

Comparative Examples 1 and 2

(20) An interlayer film for laminated glass and laminated glasses were obtained in the same manner as in Example 1, except that the kind of the luminescent material and the maximum and minimum thicknesses in the thickness direction of the luminescent layer were changed as shown in Table 1, and that the shape-adjusting layer was not laminated.

Examples 4 to 8, Comparative Examples 3 and 4

(21) An interlayer film for laminated glass and laminated glasses were obtained in the same manner as in Example 1, except that the maximum and minimum thicknesses in the thickness direction of the luminescent layer and the minimum and maximum thicknesses and the wedge angle of the interlayer film were changed as shown in Table 2.

Examples 9 to 12, Comparative Examples 5 and 6

(22) An interlayer film for laminated glass and laminated glasses were obtained in the same manner as in Example 1, except that the composition of the polyvinyl butyral, the plasticizer content, the maximum and minimum thicknesses in the thickness direction of the luminescent layer, and the minimum and maximum thicknesses and the wedge angle of the interlayer film were changed as shown in Table 3.

Example 13

(23) (1) Preparation of Resin Composition for Luminescent Layer

(24) To 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) was added 1.5 parts by weight of diethyl-2,5-dihydroxyterephthalate (diethyl 2,5-dihydroxyterephthalate, available from Aldrich), which was a compound represented by Formula (1), as a luminescent material. Thus, a luminescent plasticizer solution was prepared. Separately, polyvinyl butyral (acetyl group content: 0.9 mol %, hydroxy group content: 30.0 mol %, degree of butyralization: 69.1 mol %) was obtained by acetalizing polyvinyl alcohol having a degree of polymerization of 1700 with n-butyraldehyde. All of the obtained plasticizer solution and 100 parts by weight of polyvinyl butyral were sufficiently kneaded with a mixing roll to prepare a resin composition for a luminescent layer.

(25) (2) Preparation of Resin Composition for First and Second Resin Layers

(26) Magnesium acetate as an adhesion modifier was added to 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO), whereby a plasticizer solution was prepared. Separately, polyvinyl butyral (acetyl group content: 0.9 mol %, hydroxy group content: 30.0 mol %, degree of butyralization: 69.1 mol %) was prepared by acetalizing polyvinyl alcohol having a degree of polymerization of 1700 with n-butyraldehyde. All of the obtained plasticizer solution and 100 parts by weight of the polyvinyl butyral were sufficiently kneaded with a mixing roll to prepare a resin composition for first and second resin layers.

(27) The magnesium acetate was added to the triethyleneglycol di-2-ethylhexanoate (3GO) in such an amount that the first and second resin layers had a magnesium element concentration of 70 ppm.

(28) (3) Preparation of Resin Composition for Sound Insulation Layer

(29) Polyvinyl butyral (acetyl group content: 12.5 mol %, hydroxy group content: 23.6 mol %, degree of butyralization: 63.9 mol %) was obtained by acetalizing polyvinyl alcohol having a degree of polymerization of 2300 with n-butyraldehyde. An amount of 60 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) and 100 parts by weight of the polyvinyl butyral were sufficiently kneaded with a mixing roll to prepare a resin composition for a sound insulation layer.

(30) (4) Preparation of Shape-Adjusting Layer

(31) The resin composition for first and second resin layers and the resin composition for a sound insulation layer were co-extruded with a co-extruder, whereby a three-layer laminate as a shape-adjusting layer was prepared in which a first resin layer, a sound insulation layer, and a second resin layer were laminated in the stated order.

(32) (5) Preparation of Interlayer Film for Laminated Glass

(33) The obtained resin composition for a luminescent layer was extruded into a single layer to prepare a luminescent layer. The shape-adjusting layer and the luminescent layer were laminated such that the first resin layer, the sound insulation layer, the second resin layer, and the luminescent layer were laminated in the stated order. Thus, a four-layer interlayer film for laminated glass was obtained.

(34) The shortest distance between a first end and a second end in the direction perpendicular to the extrusion direction of the obtained film was 1 m.

(35) The luminescent layer of the obtained interlayer film for laminated glass had a wedge-shaped cross-sectional shape with a minimum thickness of 90 m and a maximum thickness of 140 m. The entire interlayer film for laminated glass had a wedge-shaped cross-sectional shape with a minimum thickness of 800 m and a maximum thickness of 1200 m. The first resin layer of the obtained interlayer film for laminated glass had a wedge-shaped cross-sectional shape with a minimum thickness of 305 m and a maximum thickness of 480 m. The sound insulation layer had a rectangular cross-sectional shape with an average thickness of 100 m. The second resin layer had a wedge-shaped cross-sectional shape with a minimum thickness of 305 m and a maximum thickness of 480 m. The first end of the interlayer film for laminated glass had the minimum thickness and the second end had the maximum thickness. The minimum and maximum thicknesses were measured by observation with a light microscope.

(36) (6) Preparation of Laminated Glass

(37) The obtained interlayer film was interposed between two transparent float glass sheets (1000 mm long300 mm wide2.5 mm thick) to prepare a laminate. The laminate was temporarily pressure-bonded with heating rolls at 230 C. The temporarily pressure-bonded laminate was pressure-bonded by a heating roll method with an autoclave at 135 C. and 1.2 MPa for 20 minutes to prepare a laminated glass (1000 mm long300 mm wide).

(38) (7) Preparation of Laminated Glass for Luminance Measurement

(39) A piece (thin portion) having a size of 10 cm long10 cm wide was cut out of the interlayer film such that the center of the piece was at a point on the shortest line between the first and second ends and 10 cm away from the first end. Similarly, a piece (thick portion) having a size of 10 cm long10 cm wide was cut out of the interlayer film such that the center of the piece was at a point on the shortest line between the first and second ends and 10 cm away from the second end.

(40) Each of the pieces (the thin portion and the thick portion) of the interlayer film was interposed between two transparent float glass sheets (100 mm long100 mm wide2.5 mm thick) to prepare a laminate. The laminate was temporarily pressure-bonded with heating rolls at 230 C. The temporarily pressure-bonded laminate was then pressure-bonded by a heating roll method with an autoclave at 135 C. and 1.2 MPa for 20 minutes to prepare a laminated glass (100 mm long100 mm wide) for luminance measurement.

Example 14, Comparative Examples 7 and 8

(41) An interlayer film for laminated glass and laminated glasses were obtained in the same manner as in Example 13, except that the minimum and maximum thicknesses of the luminescent layer, the minimum and maximum thicknesses of the first resin layer, and the minimum and maximum thicknesses of the second resin layer were changed as shown in Table 4.

(42) (Evaluation)

(43) The laminated glasses obtained in the examples and the comparative examples were evaluated in the following methods.

(44) The results are shown in Tables 1 to 4.

(45) (1) Evaluation of Occurrence of Double Image Phenomenon

(46) Each obtained laminated glass (1000 mm long300 mm wide) was mounted at the position of a windshield. Information was reflected on the laminated glass from a display unit disposed below the laminated glass. The occurrence or nonoccurrence of a double image phenomenon was visually checked from a predetermined position. A laminated glass on which no double image phenomenon was observed was rated (Good), and a laminated film on which a double image phenomenon was observed was rated x (Poor).

(47) (2) Evaluation of Luminance Variation

(48) Each laminated glass for luminance measurement was placed in a dark room, and the entire surface thereof was irradiated with light from a high power xenon light source (REX-250, Asahi Spectra Co., Ltd, irradiation wavelength: 405 nm) set at a position of 10 cm distant from the plane of the laminated glass in the vertical direction. The luminance was measured with a luminance meter (SR-3AR, available from Topcon Technohouse Corporation) set at a position at an angle of 45 degrees relative to the plane of the irradiated laminated glass at a distance (shortest distance) of 35 cm from the plane of the laminated glass.

(49) A rating (Good) was given when the absolute value of the difference in the luminance between the thin portion and the thick portion of the interlayer film was 200 or less. A rating x (Poor) was given when the absolute value of the difference was more than 200.

(50) TABLE-US-00001 TABLE 1 Comparative Comparative Example 1 Example 2 Example 3 Example 1 Example 2 Composition Resin composition for Polyvinyl butyral 100 100 100 100 100 luminescent layer (Hydroxy group content: 23.6 mol %, (parts by weight) Acetyl group content: 12.5 mol %, Degree of acetalization: 63.9 mol %) Plasticizer (3GO) 60 60 60 40 40 Luminescent material 1.5 1.5 0 0.2 0 (diethyl-2,5-dihydroxyterephthalate) Luminescent material 0 0 1.5 0 0.2 (2-(3-oxoindolin-1- ylidene)methylquinoline) Resin composition for Polyvinyl butyral 100 100 100 shape-adjusting layer (Hydroxy group content: 30.0 mol %, (parts by weight) Acetyl group content: 0.9 mol %, Degree of acetalization: 69.1 mol %) Plasticizer (3GO) 40 40 40 Luminescent material 0 0 0 (diethyl-2,5-dihydroxyterephthalate) Luminescent material 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) Shape Luminescent layer Minimum thickness (m) 90 300 90 800 800 Maximum thickness (m) 140 350 140 1200 1200 Shape Wedge shape Wedge shape Wedge shape Wedge shape Wedge shape Interlayer film Minimum thickness (m) 800 800 800 800 800 Maximum thickness (m) 1200 1200 1200 1200 1200 Wedge angle (mrad) 0.4 0.4 0.4 0.4 0.4 Evaluation Evaluation of occurance of double image phenomenon Evaluation of Luminance of thin portion 726 780 1200 715 1110 luminance variation Luminance of thick portion 754 790 1210 975 1510 Luminance variation x x

(51) TABLE-US-00002 TABLE 2 Example 4 Example 5 Example 6 Example 7 Composition Resin composition for Polyvinyl butyral 100 100 100 100 luminescent layer (Hydroxy group content 23.6 mol %, (parts by weight) Acetyl group content 12.5 mol %, Degree of acetalization: 63.9 mol %) Plasticizer (3GO) 60 60 60 60 Luminescent material 1.5 1.5 1.5 1.5 (diethyl-2,5-dihydroxyterephthalate) Luminescent material 0 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) Resin composition for Polyvinyl butyral 100 100 100 100 shape-adjusting layer (Hydroxy group content 30.0 mol %, (parts by weight) Acetyl group content 0.9 mol %, Degree of acetalization: 69.1 mol %) Plasticizer (3GO) 40 40 40 40 Luminescent material 0 0 0 0 (diethyl-2,5-dihydroxyterephthalate) Luminescent material 0 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) Shape Luminescent layer Minimum thickness (m) 90 300 100 320 Maximum thickness (m) 180 350 200 380 Shape Wedge shape Wedge shape Wedge shape Wedge shape Interlayer film Minimum thickness (m) 800 800 800 800 Maximum thickness (m) 1500 1500 1800 1800 Wedge angle (mrad) 0.7 0.7 1 1 Evaluation Evaluation of occurance of double image phenomenon Evaluation of Luminance of thin portion 726 780 734 783 luminance variation Luminance of thick portion 772 790 776 795 Evaluation of luminance variation Comparative Comparative Example 8 Example 3 Example 4 Composition Resin composition for Polyvinyl butyral 100 100 100 luminescent layer (Hydroxy group content 23.6 mol %, (parts by weight) Acetyl group content 12.5 mol %, Degree of acetalization: 63.9 mol %) Plasticizer (3GO) 60 60 60 Luminescent material 1.5 1.5 1.5 (diethyl-2,5-dihydroxyterephthalate) Luminescent material 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) Resin composition for Polyvinyl butyral 100 100 100 shape-adjusting layer (Hydroxy group content 30.0 mol %, (parts by weight) Acetyl group content 0.9 mol %, Degree of acetalization: 69.1 mol %) Plasticizer (3GO) 40 40 40 Luminescent material 0 0 0 (diethyl-2,5-dihydroxyterephthalate) Luminescent material 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) Shape Luminescent layer Minimum thickness (m) 90 100 300 Maximum thickness (m) 190 300 500 Shape Wedge shape Wedge shape Wedge shape Interlayer film Minimum thickness (m) 800 800 800 Maximum thickness (m) 1200 1200 1200 Wedge angle (mrad) 0.4 0.4 0.4 Evaluation Evaluation of occurance of double image phenomenon Evaluation of Luminance of thin portion 725 730 780 luminance variation Luminance of thick portion 805 935 1000 Evaluation of luminance variation x x

(52) TABLE-US-00003 TABLE 3 Example 9 Example 10 Example 11 Composition Resin composition for Polyvinyl Hydroxy group 24.5 24.5 18 luminescent layer butyral content (mol %) Acetyl group 7.5 7.5 1 content (mol %) Degree of 68 68 81 acetalization (mol %) Parts by weight 100 100 100 Plasticizer (3GO) 60 60 60 (parts by weight) Luminescent material 1.5 1.5 1.5 (diethyl-2,5-dihydroxyterephthalate) (parts by weight) Luminescent material 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) (parts by weight) Resin composition for Polyvinyl Hydroxy group 31 31 29 shape-adjusting layer butyral content (mol %) Acetyl group 1 1 1 content (mol %) Degree of 68 68 70 acetalization (mol %) Parts by weight 100 100 100 Plasticizer (3GO) 40 40 40 (parts by weight) Luminescent material 0 0 0 (diethyl-2,5-dihydroxyterephthalate) (parts by weight) Luminescent material 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) (parts by weight) Shape Luminescent layer Minimum thickness (m) 90 100 90 Maximum thickness (m) 140 200 140 Shape Wedge shape Wedge shape Wedge shape Interlayer film Minimum thickness (m) 800 800 800 Maximum thickness (m) 1200 1800 1200 Wedge angle (mrad) 0.4 1 0.4 Evaluation Evaluation of occurance of double image phenomenon Evaluation of Luminance of thin portion 726 733 725 luminance variation Luminance of thick portion 754 771 754 Evaluation of luminance variation Comparative Comparative Example 12 Example 5 Example 6 Composition Resin composition for Polyvinyl Hydroxy group 18 24.5 18 luminescent layer butyral content (mol %) Acetyl group 1 7.5 1 content (mol %) Degree of 81 68 81 acetalization (mol %) Parts by weight 100 100 100 Plasticizer (3GO) 60 60 60 (parts by weight) Luminescent material 1.5 1.5 1.5 (diethyl-2,5-dihydroxyterephthalate) (parts by weight) Luminescent material 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) (parts by weight) Resin composition for Polyvinyl Hydroxy group 29 31 29 shape-adjusting layer butyral content (mol %) Acetyl group 1 1 1 content (mol %) Degree of 70 68 70 acetalization (mol %) Parts by weight 100 100 100 Plasticizer (3GO) 40 40 40 (parts by weight) Luminescent material 0 0 0 (diethyl-2,5-dihydroxyterephthalate) (parts by weight) Luminescent material 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) (parts by weight) Shape Luminescent layer Minimum thickness (m) 100 100 100 Maximum thickness (m) 200 300 300 Shape Wedge shape Wedge shape Wedge shape Interlayer film Minimum thickness (m) 800 800 800 Maximum thickness (m) 1800 1200 1200 Wedge angle (mrad) 1 0.4 0.4 Evaluation Evaluation of occurance of double image phenomenon Evaluation of Luminance of thin portion 730 730 730 luminance variation Luminance of thick portion 769 935 935 Evaluation of luminance variation x x

(53) TABLE-US-00004 TABLE 4 Comparative Comparative Example 13 Example 14 Example 7 Example 8 Composition Shape- Resin composition Polyvinyl butyral 100 100 100 100 adjusting for first resin layer (Hydroxy group content: 30.0 mol %, layer (parts by weight) Acetyl group content: 0.9 mol %, Degree of acetalization: 69.1 mol %) Plasticizer (3GO) 40 40 40 40 Luminescent material 0 0 0 0 (diethyl-2,5-dihydroxyterephthalate) Luminescent material 0 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) Resin composition Polyvinyl butyral 100 100 100 100 for sound insulation (Hydroxy group content: 23.6 mol %, layer Acetyl group content: 12.5 mol %, (parts by weight) Degree of acetalization: 63.9 mol %) Plasticizer (3GO) 60 60 60 60 Luminescent material 0 0 0 0 (diethyl-2,5-dihydroxyterephthalate) Luminescent material 0 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) Resin composition Polyvinyl butyral 100 100 100 100 for second resin (Hydroxy group content: 30.0 mol %, layer Acetyl group content: 0.9 mol %, (parts by weight) Degree of acetalization: 69.1 mol %) Plasticizer (3GO) 40 40 40 40 Luminescent material 0 0 0 0 (diethyl-2,5-dihydroxyterephthalate) Luminescent material 0 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) Resin composition Polyvinyl butyral 100 100 100 100 for luminescent layer (Hydroxy group content: 30.0 mol %, (parts by weight) Acetyl group content: 0.9 mol %, Degree of acetalization: 69.1 mol %) Plasticizer (3GO) 40 40 40 40 Luminescent material 1.5 1.5 1.5 1.5 (diethyl-2,5-dihydroxyterephthalate) Luminescent material 0 0 0 0 (2-(3-oxoindolin-1- ylidene)methylquinoline) Shape Interlayer film configuration First resin layer/ First resin layer/ First resin layer/ Frst resin layer/ Sound insulation layer/ Sound insulation layer/ Sound insulation layer/ Sound insulation layer/ Second resin layer/ Second resin layer/ Second resin layer/ Second resin layer/ Luminescent layer Luminescent layer Luminescent layer Luminescent layer First resin layer Minimum thickness (m) 305 200 300 200 Maximum thickness (m) 480 375 400 300 Sound insulation layer Average thickness (m) 100 100 100 100 Seond resin layer Minimum thickness (m) 305 200 300 200 Maximum thickness (m) 480 375 400 300 Luminescent layer Minimum thickness (m) 90 300 100 300 Maximum thickness (m) 140 350 300 500 Shape Wedge shape Wedge shape Wedge shape Wedge shape Interlayer film Minimum thickness (m) 800 800 800 800 Maximum thickness (m) 1200 1200 1200 1200 Wedge angle (mrad) 0.4 0.4 0.4 0.4 Evaluation Evaluation of occurance of double image phenomenon Evaluation of Luminance of thin portion 728 798 731 790 luminance variation Luminance of thick portion 760 812 954 1020 Evaluation of luminance variation x x

INDUSTRIAL APPLICABILITY

(54) The present invention provides an interlayer film for laminated glass which prevents a double image phenomenon in a specific area of laminated glass and enables display of high contrast images at a luminance within a certain range. The present invention also provides a laminated glass including the interlayer film for laminated glass.

REFERENCE SIGNS LIST

(55) 1 Interlayer film for laminated glass 11 Luminescent layer 12 Shape-adjusting layer 2 Interlayer film for laminated glass 21 Luminescent layer 22 Shape-adjusting layer 23 Shape-adjusting layer 3 Interlayer film for laminated glass 31 Luminescent layer 32 Shape-adjusting layer 33 Shape-adjusting layer