Interlayer for laminated glass and laminated glass

Abstract

The present invention aims to provide an interlayer film for a laminated glass, which includes two or more stacked resin layers including a colored layer, exhibits excellent deaeration properties in a production process of a laminated glass, and is capable of preventing poor appearance of a colored portion, and a laminated glass including the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a laminated structure including two or more layers, at least including: an outer layer disposed on the outermost surface of the interlayer film for a laminated glass and having a large number of recesses on one surface; and a colored layer containing a colorant, a minimum distance between an outer layer side surface of the colored layer and the surface having a large number of recesses of the outer layer being 150 m or longer.

Claims

1. An interlayer film for a laminated glass, having a laminated structure including four or more layers, at least comprising: an outer layer disposed on the outermost surface of the interlayer film for a laminated glass and having a number of recesses on one surface; and a colored layer containing a colorant, wherein a minimum distance between an outer layer side surface of the colored layer and the surface having a number of recesses of the outer layer is 150 m or longer.

2. The interlayer film for a laminated glass according to claim 1, wherein the surface having a number of recesses of the outer layer has a ten-point average roughness Rz measured in conformity with JIS B 0601 (1994) of 15 to 60 m.

3. The interlayer film for a laminated glass according to claim 1, which has a quadruple layer structure including the outer layer, which is a first protective layer, having a number of recesses on one surface, a sound insulation layer, the colored layer, and a second protective layer stacked in the stated order.

4. A laminated glass comprising: a pair of glass plates; and the interlayer film for a laminated glass according to claim 1 interposed between the glass plates.

5. A laminated glass comprising: a pair of glass plates; and the interlayer film for a laminated glass according to claim 2 interposed between the glass plates.

6. A laminated glass comprising: a pair of glass plates; and the interlayer film for a laminated glass according to claim 3 interposed between the glass plates.

7. The interlayer film for a laminated glass according to claim 3, wherein a thickness of the first protective layer is 400 m or more.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a view schematically illustrating an exemplary interlayer film for a laminated glass having, on the surface thereof, recesses having a groove shape with a continuous bottom arranged adjacently parallel to each other at equal intervals.

(2) FIG. 2 is a view schematically illustrating an exemplary interlayer film for a laminated glass having, on the surface thereof, recesses having a groove shape with a continuous bottom arranged adjacently parallel to each other at equal intervals.

(3) FIG. 3 is a view schematically illustrating an exemplary pattern of recesses in the shape of engraved lines formed on the surface of an interlayer film for a laminated glass.

(4) FIG. 4 is a view schematically illustrating a laminated glass for a vehicle whose colored layer is disposed in a belt-like shape along the upper portion.

(5) FIG. 5 is a view schematically illustrating the method for measuring the distance between an outer layer side surface of a colored layer and the surface having a large number of recesses of the outer layer.

(6) FIG. 6 is a view schematically illustrating an exemplary preferred embodiment of the interlayer film for a laminated glass of the present invention.

DESCRIPTION OF EMBODIMENTS

(7) Embodiments of the present invention are more specifically described in the following with reference to, but not limited to, examples.

(8) (Preparation of a Resin Composition for an Outer Layer and a Protective Layer)

(9) Polyvinyl alcohol having an average degree of polymerization of 1,700 was acetalized with n-butyraldehyde to give polyvinyl butyral (PVB1, acetyl group content: 1 mol %, butyral group content: 69 mol %, hydroxy group content: 30 mol %). To 100 parts by mass of the polyvinyl butyral was added 40 parts by mass of triethylene glycol-di-2-ethylhexanoate (3GO) as a plasticizer, and the mixture was kneaded well with a mixing roll to give a resin composition for an outer layer and a protective layer.

(10) (Preparation of a Resin Composition for a Colored Layer)

(11) Polyvinyl alcohol having an average degree of polymerization of 1,700 was acetalized with n-butyraldehyde to give polyvinyl butyral (PVB1, acetyl group content: 1 mol %, butyral group content: 69 mol %, hydroxy group content: 30 mol %). To 100 parts by mass of the polyvinyl butyral were added three or four parts by mass of SG-8E905 (Sumika Color Co., Ltd.) as a colorant and 36 or 37 parts by mass of triethylene glycol-di-2-ethylhexanoate (3GO) as a plasticizer, and the mixture was kneaded well with a mixing roll to give a resin composition for a colored layer.

(12) (Preparation of a Resin Composition for a Sound Insulation Layer)

(13) Polyvinyl alcohol having an average degree of polymerization of 2,400 was acetalized with n-butyraldehyde to give polyvinyl butyral (PVB2, acetyl group content: 12 mol %, butyral group content: 65 mol %, hydroxy group content: 23 mol %). To 100 parts by mass of the polyvinyl butyral was added 60 parts by mass of triethylene glycol-di-2-ethylhexanoate (3GO) as a plasticizer, and the mixture was kneaded well with a mixing roll to give a resin composition for a sound insulation layer.

Examples 1 to 6, Comparative Examples 1 and 2

(14) (1) Preparation of a Laminate

(15) The obtained resin composition for an outer layer and a protective layer, resin composition for a colored layer, and resin composition for a sound insulation layer were co-extruded in accordance with Tables 1 and 2 using a co-extruder to form a laminate having a triple to quintuple layer structure including an outer layer (protective layer) 1, a sound insulation layer, a protective layer 3, a colored layer, and an outer layer (protective layer) 2 stacked in the stated order (the order shown in the tables).

(16) In Examples 5 and 6, the colorants used were SG-5A1251 and SG-4A1053, respectively.

(17) (2) Impartment of Recesses

(18) Recesses were imparted to the surface of the obtained laminate by the following method to give an interlayer film for a laminated glass.

(19) In the first step, a random pattern of protrusions and recesses was transferred to both surfaces of the laminate by the following process. First, random protrusions and recesses were formed on iron roll surfaces with an abrasive material, and the iron rolls were subjected to vertical grinding. Finer protrusions and recesses were further formed on planar portions with a finer abrasive material after the grinding. In this manner, a pair of rolls in the same shape having a coarse main embossed pattern and a fine sub-embossed pattern were obtained. The pair of rolls was used as a device for transferring a pattern of protrusions and recesses to transfer a random pattern of protrusions and recesses to both surfaces of the obtained laminate. The transferring conditions employed here were a temperature of the laminate of 80 C., a temperature of the rolls of 145 C., a linear velocity of 10 m/min, and a linear pressure of 50 to 100 kN/m.

(20) In the second step, recesses having a groove shape with a continuous bottom (shape of an engraved line) were imparted to a surface of the laminate by the following process, so that an interlayer film for a laminated glass was obtained. A pair of rolls including a metal roll having a surface milled with a triangular oblique line-type mill and a rubber roll having a JIS hardness of 45 to 75 was used as a device for transferring a pattern of protrusions and recesses. The obtained laminate to which the random pattern of protrusions and recesses was transferred in the first step was passed through the device for transferring a pattern of protrusions and recesses, whereby protrusions and recesses in which recesses having a groove shape with a continuous bottom (shape of an engraved line) were arranged parallel to each other at equal intervals were imparted to one surface of the laminate. The transferring was performed under the conditions of a temperature of the interlayer film for laminated glass of ambient temperature, a roll temperature of 130 C., a linear velocity of 10 m/min, a film width of 1.5 m, and a pressure of 500 kPa.

(21) Subsequently, the similar treatment was performed to impart recesses having a groove shape with a continuous bottom (shape of an engraved line) to the other surface of the interlayer film for a laminated glass, except that the shape of the protrusions and recesses on a metal roll used was different.

(22) (3) Measurement of Rz and Sm on Outer Layer of Interlayer Film for Laminated Glass

(23) The ten-point average roughness Rz and average interval Sm of the recesses on the surface of the obtained interlayer film for a laminated glass were measured in conformity with JIS B 0601 (1994) with a high-precision profilometry system (Keyence Corporation, KS-1100 equipped with a tip head of LT-9510VM model). The measurement was performed under the conditions of a stage travel rate of 1000 m/s, a measurement pitch of the X-axis of 10 m, a measurement pitch of the Y-axis of 10 m, a horizontal visual field of 2.5 cm and a vertical visual field of 1 cm. The line roughness (1994 JIS) of the obtained data was analyzed with analysis software KS-Analyzer (Keyence Corporation) using a horizontal line and height smoothing correction (cut-off value: 2.50 mm, simple average: 12). Each of the Rz and Sm used was the average of arbitrarily selected three points that were spaced by at least 1 mm in the perpendicular direction of the image.

(24) (4) Measurement of the Minimum Distance Between the Outer Layer Side Surface of the Colored Layer and the Surface Having a Large Number of Recesses of the Outer Layer in the Interlayer Film for a Laminated Glass

(25) The obtained interlayer film for a laminated glass was stored in an atmosphere with a room temperature of 23 C. and a humidity of 40% for at least 24 hours. Under the same conditions, the interlayer film for a laminated glass including a colored portion was cut with a pair of scissors (Hayashi Cutlery Co., Ltd., model 15101) into a cuboid having a size of 2 mm (MD direction)20 mm (TD direction). The cutting position here was within 50 mm in the MD direction from an end of the sample used for production of the laminated glass and subjected to appearance checking. The cross section of the cut interlayer film for a laminated glass was observed with a digital microscope (Nakaden Corporation, model FS1400) with a magnification of 270 to measure the minimum distance between the surface having a large number of recesses of the outer layer and the outer layer side surface of the colored layer. The stage on which the sample was placed was a transmitted lighting for low magnification systems available from Nakaden Corporation.

(26) (5) Production of a Laminated Glass

(27) The obtained interlayer film for a laminated glass was sandwiched between two clear glass plates (30 cm in length30 cm in width2.5 mm in thickness) in conformity with JIS R 3202 (1996) and the portions of the film protruding from the glass plates were cut off, whereby a laminated glass structure was prepared. The resulting laminated glass structure was transferred into a rubber bag, which was then connected to a vacuum suction device. The rubber bag was heated so that the temperature of the laminated glass structure (preliminary pressure bonding temperature) reached 70 C., while being held under a reduced pressure of 60 kPa (absolute pressure of 16 kPa) for 10 minutes. Thereafter, the pressure was returned to atmospheric pressure so that the preliminary pressure bonding was completed.

(28) The preliminary bonded laminated glass structure was placed in an autoclave at a temperature of 140 C. and a pressure of 1300 kPa for 20 minutes. The temperature was dropped to 50 C. to return the pressure to atmospheric pressure so that the final pressure bonding was completed. Thereby, a laminated glass was obtained.

Examples 7 to 11, Comparative Example 3

(29) A laminate having a triple or quadruple layer structure was obtained by the same procedure as that in Example 1, except that the co-extrusion conditions of the obtained resin composition for an outer layer and a protective layer, resin composition for a colored layer, and resin composition for a sound insulation layer were changed and the laminate width was changed from 1.5 m to 1.0 m such that the cross-sectional shape, maximum thickness, minimum thickness, and length in the width direction of the outer layer (protective layer) 1, the sound insulation layer, the colored layer, the outer layer (protective layer) 2, and the whole interlayer film obtained after impartment of protrusions and recesses were as shown in Tables 3 and 4. The co-extrusion conditions were adjusted, so that a temperature gradient was provided to the die lip in the range from 100 C. to 280 C. such that the end of the whole interlayer film with a smaller thickness in the width direction would come to the low temperature side and the end of the whole interlayer film with a larger thickness would come to the high temperature side, and the lip interval was set in the range of 1.0 to 4.0 mm.

(30) Also, Rz, Sm, and the minimum distance between the outer layer side surface of the colored layer and the surface having a large number of recesses of the outer layer were measured by the same methods as those in Example 1. Since the thickness of each of the protective layer 1, the sound insulation layer, the colored layer, and the outer layer varies in the width direction in each of Examples 7 to 11 and Comparative Example 3, the thickness of each layer was measured at a colored side end (end on the side with a colored portion) and at a transparent side end (end without a colored portion). In Example 10, the colorant used was SG-5A1251.

(31) An interlayer film for a laminated glass was obtained by imparting protrusions and recesses to the obtained laminate by the same method as that in Example 1, except that the conditions for the impartment of protrusions and recesses were changed such that the surface roughness Rz and the interval Sm of the obtained interlayer for a laminated glass were the values as shown in Tables 3 and 4.

(32) The obtained interlayer film for a laminated glass was sandwiched between two clear glass plates (30 cm in length30 cm in width2.5 mm in thickness) in conformity with JIS R 3202 (1996) such that the region where the colored layer had the maximum thickness came between the plates, and the portions of the film protruding from the glass plates were cut off, whereby a laminate was prepared. The resulting laminated glass structure was transferred into a rubber bag, which was then connected to a vacuum suction device. The rubber bag was heated so that the temperature of the laminated glass structure (preliminary pressure bonding temperature) reached 70 C., while being held under a reduced pressure of 60 kPa (absolute pressure of 16 kPa) for 10 minutes. Thereafter, the pressure was returned to atmospheric pressure so that the preliminary pressure bonding was completed.

(33) The preliminary bonded laminated glass structure was placed in an autoclave at a temperature of 140 C. and a pressure of 1300 kPa for 20 minutes. The temperature was dropped to 50 C. to return the pressure to atmospheric pressure so that the final pressure bonding was completed. Thereby, a laminated glass was obtained.

(34) (Evaluation)

(35) The appearance of the colored layer portion in the laminated glass obtained in each of the examples and comparative examples was evaluated by the following method. Tables 1 to 4 show the results.

(36) (Evaluation on Appearance by Visual Observation)

(37) The obtained laminated glass was put on a light table (Ayase Kogyo K.K., model 122062), and whether or not the laminated glass had color unevenness was determined by visual observation. The laminated glass was evaluated as a poor appearance product and marked as x (poor) when at least four observers out of 10 observers perceived color unevenness. The laminated glass was evaluated as a good appearance product and marked as 0 (good) when three or less observers perceived color unevenness.

(38) (Measurement of Visible Light Transmittance)

(39) The visible light transmittance of the laminated glass was evaluated based on an index Tv (total visible light transmittance). The index Tv was calculated by determining the weighted average of the transmittances at a wavelength of 380 to 780 nm in conformity with JIS R 3212 (1998) and JIS Z 8722.

(40) TABLE-US-00001 TABLE 1 Example 1 Example 2 Example 3 Example 4 Outer layer Thermoplastic Type PVB1 PVB1 PVB1 PVB1 (protective resin Amount (parts by mass) 100 100 100 100 layer) 1 Plasticizer Type 3GO 3GO 3GO 3GO Amount (parts by mass) 40 40 40 40 Roughness Rz of surface having 43 35 61 26 recesses (m) Interval Sm of recesses (m) 233 205 212 482 Thickness (m) 267 214 296 341 Sound Thermoplastic Type PVB2 PVB2 insulation resin Amount (parts by mass) 100 100 layer Plasticizer Type 3GO 3GO Amount (parts by mass) 60 60 Thickness (m) 91 98 Protective Thermoplastic Type layer 3 resin Amount (parts by mass) Plasticizer Type Amount (parts by mass) Thickness (m) Colored Thermoplastic Type PVB1 PVB1 PVB1 PVB1 layer resin Amount (parts by mass) 100 100 100 100 Colorant Type SG-8E905 SG-8E905 SG-8E905 SG-8E905 Amount (parts by mass) 3 4 4 3 Plasticizer Type 3GO 3GO 3GO 3GO Amount (parts by mass) 37 36 36 37 Thickness (m) 270 144 178 270 Outer layer Thermoplastic Type PVB1 PVB1 PVB1 PVB1 (protective resin Amount (parts by mass) 100 100 100 100 layer) 2 Plasticizer Type 3GO 3GO 3GO 3GO Amount (parts by mass) 40 40 40 40 Roughness Rz of surface having 57 37 53 30 recesses (m) Interval Sm of recesses (m) 221 203 240 750 Thickness (m) 243 370 248 155 Whole Arrangement Protective layer Protective layer Protective layer Protective layer interlayer 1/colored 1/sound 1/sound 1/colored film layer/protective insulation insulation layer/protective layer 2 layer/colored layer/colored layer 2 layer/protective layer/protective layer 2 layer 2 Minimum distance between surface of colored layer 267 305 394 341 and surface of outer layer (protective layer) 1 having recesses (m) Minimum distance between surface of colored layer 243 370 248 155 and surface of outer layer (protective layer) 2 having recesses (m) Evaluation Evaluation on appearance by visual observation Visible light transmittance (%) 8.8 17.1 11.8 7.0

(41) TABLE-US-00002 TABLE 2 Comparative Comparative Example 5 Example 6 Example 1 Example 2 Outer layer Thermoplastic Type PVB1 PVB1 PVB1 PVB1 (protective resin Amount (parts by mass) 100 100 100 100 layer) 1 Plasticizer Type 3GO 3GO 3GO 3GO Amount (parts by mass) 40 40 40 40 Roughness Rz of surface having 28 29 45 49 recesses (m) Interval Sm of recesses (m) 477 485 215 220 Thickness (m) 308 252 338 268 Sound Thermoplastic Type PVB2 PVB2 insulation resin Amount (parts by mass) 100 100 layer Plasticizer Type 3GO 3GO Amount (parts by mass) 60 60 Thickness (m) 105 113 Protective Thermoplastic Type PVB1 layer 3 resin Amount (parts by mass) 100 Plasticizer Type 3GO Amount (parts by mass) 40 Thickness (m) 111 Colored Thermoplastic Type PVB1 PVB1 PVB1 PVB1 layer resin Amount (parts by mass) 100 100 100 100 Colorant Type SG-5A1251 SG-4A1053 SG-8E905 SG-8E905 Amount (parts by mass) 3 3 4 4 Plasticizer Type 3GO 3GO 3GO 3GO Amount (parts by mass) 37 37 36 36 Thickness (m) 278 256 229 244 Outer layer Thermoplastic Type PVB1 PVB1 PVB1 PVB1 (protective resin Amount (parts by mass) 100 100 100 100 layer) 2 Plasticizer Type 3GO 3GO 3GO 3GO Amount (parts by mass) 40 40 40 40 Roughness Rz of surface having 30 28 46 56 recesses (m) Interval Sm of recesses (m) 742 740 209 217 Thickness (m) 178 264 147 84 Whole Arrangement Protective layer Protective layer Protective layer Protective layer interlayer 1/colored 1/colored 1/sound 1/sound film layer/protective layer/protective insulation insulation layer 2 layer 2 layer/colored layer/protective layer/protective layer 3/colored layer 2 layer/protective layer 2 Minimum distance between surface of colored layer 308 252 443 492 and surface of outer layer (protective layer) 1 having recesses (m) Minimum distance between surface of colored layer 178 264 147 84 and surface of outer layer (protective layer) 2 having recesses (m) Evaluation Evaluation on appearance by visual observation x x Visible light transmittance (%) 8.0 10.5 5.5 3.9

(42) TABLE-US-00003 TABLE 3 Example 7 Example 8 Example 9 Outer layer Thermoplastic Type PVB1 PVB1 PVB1 (protective resin Amount (parts by 100 100 100 layer) 1 mass) Plasticizer Type 3GO 3GO 3GO Amount (parts by 40 40 40 mass) Roughness Rz of surface having 35 40 29 recesses (m) Interval Sm of recesses (m) 200 300 485 Cross-sectional shape Partial wedge Partial wedge Partial wedge shape shape shape Maximum thickness (m) 560 490 490 Minimum thickness (m) 400 325 350 Sound Thermoplastic Type PVB2 PVB2 insulation resin Amount (parts by 100 100 layer mass) Plasticizer Type 3GO 3GO Amount (parts by 60 60 mass) Cross-sectional shape Wedge shape Wedge shape Maximum thickness (m) 150 150 Minimum thickness (m) 100 100 Colored Thermoplastic Type PVB1 PVB1 PVB1 layer resin Amount (parts by 100 100 100 mass) Colorant Type SG-8E905 SG-8E905 SG-8E905 Amount (parts by 2 2 2 mass) Plasticizer Type 3GO 3GO 3GO Amount (parts by 37 36 36 mass) Cross-sectional shape Wedge shape Wedge shape Wedge shape Length of colored layer in width 20 20 20 direction (cm) Maximum thickness (m) 400 400 400 Minimum thickness (m) 0 0 0 Outer layer Thermoplastic Type PVB1 PVB1 PVB1 (protective resin Amount (parts by 100 100 100 layer) 2 mass) Plasticizer Type 3GO 3GO 3GO Amount (parts by 40 40 40 mass) Roughness Rz of surface having 36 42 31 recesses (m) Interval Sm of recesses (m) 202 390 749 Cross-sectional shape Partial wedge Partial wedge Partial wedge shape shape shape Maximum thickness (m) 560 490 490 Minimum thickness (m) 400 325 200 Film end Thickness of protective layer 1 400 350 350 portion [m] (transparent Thickness of sound insulation layer 100 100 side) [m] Thickness of colored layer [m] 0 0 0 Film end Thickness of protective layer 2 400 350 350 portion [m] (colored Thickness of protective layer 1 400 325 450 side) [m] Thickness of sound insulation layer 150 150 [m] Thickness of colored layer [m] 400 400 400 Thickness of protective layer 2 400 325 200 [m] Whole Arrangement Protective layer Protective layer Protective layer interlayer 1/colored 1/sound 1/sound film layer/protective insulation insulation layer 2 layer/colored layer/colored layer/protective layer/protective layer 2 layer 2 Cross-sectional shape Wedge shape Wedge shape Wedge shape Wedge angle [mrad] 0.4 0.4 0.4 Maximum thickness (m) 1200 1200 1200 Minimum thickness (m) 800 800 800 Minimum distance between surface of colored 400 475 600 layer and surface of outer layer (protective layer) 1 having recesses (m) Minimum distance between surface of colored 400 325 200 layer and surface of outer layer (protective layer) 2 having recesses (m) Evaluation Evaluation on appearance by visual observation Visible light transmittance (%) 8.5 9.2 9.0

(43) TABLE-US-00004 TABLE 4 Comparative Example 10 Example 11 Example 3 Outer layer Thermoplastic Type PVB1 PVB1 PVB1 (protective resin Amount (parts by 100 100 100 layer) 1 mass) Plasticizer Type 3GO 3GO 3GO Amount (parts by 40 40 40 mass) Roughness Rz of surface having recesses 30 38 45 (m) Interval Sm of recesses (m) 210 200 300 Cross-sectional shape Partial wedge Partial wedge Partial wedge shape shape shape Maximum thickness (m) 490 700 520 Minimum thickness (m) 320 350 350 Sound Thermoplastic Type PVB2 PVB2 PVB2 insulation resin Amount (parts by 100 100 100 layer mass) Plasticizer Type 3GO 3GO 3GO Amount (parts by 60 60 60 mass) Cross-sectional shape Wedge shape Wedge shape Wedge shape Maximum thickness (m) 150 225 150 Minimum thickness (m) 100 100 100 Colored Thermoplastic Type PVB1 PVB1 PVB1 layer resin Amount (parts by 100 100 100 mass) Colorant Type SG-5A1251 SG-8E905 SG-8E905 Amount (parts by 2 2 2 mass) Plasticizer Type 3GO 3GO 3GO Amount (parts by 36 36 36 mass) Cross-sectional shape Wedge shape Wedge shape Wedge shape Length of colored layer in width direction 20 20 20 (cm) Maximum thickness (m) 430 400 400 Minimum thickness (m) 0 0 0 Outer layer Thermoplastic Type PVB1 PVB1 PVB1 (protective resin Amount (parts by 100 100 100 layer) 2 mass) Plasticizer Type 3GO 3GO 3GO Amount (parts by 40 40 40 mass) Roughness Rz of surface having recesses 31 26 43 (m) Interval Sm of recesses (m) 210 205 400 Cross-sectional shape Partial wedge Partial wedge Partial wedge shape shape shape Maximum thickness (m) 490 700 490 Minimum thickness (m) 320 350 130 Film end Thickness of protective layer 1 (m) 350 350 350 portion Thickness of sound insulation layer (m) 100 100 100 (transparent Thickness of colored layer (m) 0 0 0 side) Thickness of protective layer 2 (m) 350 350 350 Film end Thickness of protective layer 1 (m) 320 590 520 portion Thickness of sound insulation layer (m) 150 225 150 (colored Thickness of colored layer (m) 430 400 400 side) Thickness of protective layer 2 (m) 320 585 130 Whole Arrangement Protective layer Protective layer Protective layer interlayer 1/sound 1/sound 1/sound film insulation insulation insulation layer/colored layer/colored layer/colored layer/protective layer/protective layer/protective layer 2 layer 2 layer 2 Cross-sectional shape Wedge shape Wedge shape Wedge shape Wedge angle [mrad] 0.4 1.0 0.4 Maximum thickness (m) 1200 1800 1200 Minimum thickness (m) 800 800 800 Minimum distance between surface of colored layer and 470 715 670 surface of outer layer (protective layer) 1 having recesses (m) Minimum distance between surface of colored layer and 320 585 130 surface of outer layer (protective layer) 2 having recesses (m) Evaluation Evaluation on appearance by visual X observation Visible light transmittance (%) 7.2 8.8 9.2

INDUSTRIAL APPLICABILITY

(44) The present invention can provide an interlayer film for a laminated glass which includes two or more stacked resin layers including a colored layer, exhibits excellent deaeration properties in a production process of a laminated glass, and is capable of preventing poor appearance of a colored portion, and a laminated glass including the interlayer film for a laminated glass.

REFERENCE SIGNS LIST

(45) 1 Arbitrarily selected one recess 2 Recess adjacent to arbitrarily selected one recess 3 Recess adjacent to arbitrarily selected one recess A Interval between recess 1 and recess 2 B Interval between recess 1 and recess 3 4 Laminated glass for vehicle 41 Colored layer disposed in belt-like shape along upper portion 51 Interlayer film for a laminated glass 511 Colored layer whose cross section is rectangular 512 Outer layer having large number of recesses on one surface a Minimum distance between outer layer side surface of colored layer and surface having large number of recesses of outer layer 52 Interlayer film for a laminated glass 521 Colored layer whose cross section is wedge shaped 522 Outer layer having large number of recesses on one surface b Minimum distance between outer layer side surface of colored layer and surface having large number of recesses of outer layer 6 Interlayer film for a laminated glass 61 Outer layer (first protective layer) having large number of recesses on one surface 62 Sound insulation layer 63 Colored layer 64 Second protective layer