WO2017170727A1 - 合わせガラス用中間膜及び合わせガラス - Google Patents
合わせガラス用中間膜及び合わせガラス Download PDFInfo
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- WO2017170727A1 WO2017170727A1 PCT/JP2017/012985 JP2017012985W WO2017170727A1 WO 2017170727 A1 WO2017170727 A1 WO 2017170727A1 JP 2017012985 W JP2017012985 W JP 2017012985W WO 2017170727 A1 WO2017170727 A1 WO 2017170727A1
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- laminated glass
- layer
- region
- intermediate film
- interlayer film
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Images
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- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/263—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer having non-uniform thickness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J1/00—Windows; Windscreens; Accessories therefor
- B60J1/02—Windows; Windscreens; Accessories therefor arranged at the vehicle front, e.g. structure of the glazing, mounting of the glazing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/05—5 or more layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/246—All polymers belonging to those covered by groups B32B27/32 and B32B27/30
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
- B32B2307/102—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/006—Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/08—Cars
Definitions
- the present invention relates to an interlayer film for laminated glass used for obtaining laminated glass. Moreover, this invention relates to the laminated glass using the said intermediate film for laminated glasses.
- Laminated glass is generally excellent in safety because it has less scattering of glass fragments even if it is damaged by external impact. For this reason, the said laminated glass is widely used for a motor vehicle, a rail vehicle, an aircraft, a ship, a building, etc.
- the laminated glass is manufactured by sandwiching an interlayer film for laminated glass between a pair of glass plates.
- HUD head-up display
- measurement information such as speed, which is driving data of a car, can be displayed on the windshield of the car.
- the above HUD has a problem that the measurement information displayed on the windshield looks double.
- Patent Document 1 discloses a laminated glass in which a wedge-shaped intermediate film having a predetermined wedge angle is sandwiched between a pair of glass plates.
- the display of measurement information reflected by one glass plate and the display of measurement information reflected by another glass plate can be performed in the driver's field of view. Can be tied to one point. For this reason, it is hard to see the display of measurement information double, and it is hard to disturb a driver
- the reflected double image is a phenomenon in which a double image is observed by information irradiation from an information display device, for example.
- a transmission double image is a phenomenon in which a double image is observed by irradiation of a headlamp of an oncoming vehicle, for example.
- an intermediate film for laminated glass used for laminated glass that is a head-up display, having a display corresponding region corresponding to a display region of the head-up display, one end, The one end having the other end on the opposite side, the thickness of the other end being larger than the thickness of the one end, and centering on the point corresponding to the 2 mm interval of the display corresponding region from the one end side to the other end side
- the absolute value of the difference between the maximum value of the measured value of thickness change and the minimum value of the measured value of thickness change is
- An interlayer film for laminated glass (abbreviated as “intermediate film” in the present specification) having a wedge angle of 32 ⁇ m or less and a wedge angle of the region on the other end side of the display corresponding region is smaller than a wedge angle of the display corresponding region.
- the wedge angle in the region on the other end side from the display corresponding region is 0.05 mrad or less smaller than the wedge angle in the display corresponding region.
- the display corresponding region is in a region from a position of 10 cm from the one end to the other end to a position of 59.8 cm from the one end to the other end.
- the wedge angle of the region on the other end side with respect to the display corresponding region is preferably 0.7 mrad or less, more preferably 0.5 mrad or less, still more preferably 0.3 mrad or less, and particularly preferably 0.1 mrad or less.
- the interlayer film preferably contains a thermoplastic resin.
- the interlayer film preferably contains a plasticizer.
- the intermediate film includes a first layer and a second layer disposed on the first surface side of the first layer.
- the first layer includes a polyvinyl acetal resin
- the second layer includes a polyvinyl acetal resin
- the polyvinyl acetal resin in the first layer The hydroxyl group content is lower than the hydroxyl group content of the polyvinyl acetal resin in the second layer.
- the first layer includes a polyvinyl acetal resin
- the second layer includes a polyvinyl acetal resin
- the first layer includes a plasticizer.
- the second layer contains a plasticizer, and the content of the plasticizer in the first layer relative to 100 parts by weight of the polyvinyl acetal resin in the first layer is The content of the plasticizer in the second layer is more than 100 parts by weight of the polyvinyl acetal resin.
- the first laminated glass member, the second laminated glass member, and the interlayer film for laminated glass described above are provided, and the first laminated glass member and the second laminated glass are provided.
- the interlayer film for laminated glass according to the present invention is an interlayer film for laminated glass used for laminated glass that is a head-up display, and has a display corresponding area corresponding to the display area of the head-up display, The other end is opposite to the one end, and the thickness of the other end is larger than the thickness of the one end, and the point corresponding to each 2 mm interval of the display corresponding region from the one end side to the other end side is the center.
- the value is 32 ⁇ m or less, and the wedge angle of the region on the other end side from the display corresponding region is smaller than the wedge angle of the display corresponding region. Therefore, the reflection double image and the transmission double image in the laminated glass Hold both sides It is possible.
- FIG. 1A and 1B are a cross-sectional view and a front view schematically showing the interlayer film for laminated glass according to the first embodiment of the present invention.
- 2A and 2B are a sectional view and a front view schematically showing an interlayer film for laminated glass according to the second embodiment of the present invention.
- FIG. 3 is a cross-sectional view showing an example of a laminated glass using the laminated glass interlayer film shown in FIG.
- FIG. 4 is a perspective view schematically showing a roll body on which the interlayer film for laminated glass shown in FIG. 1 is wound.
- FIG. 5 is a diagram for explaining a preliminary pressing method in the evaluation of double images.
- the interlayer film for laminated glass according to the present invention (sometimes abbreviated as “intermediate film” in the present specification) is used for laminated glass as a head-up display (HUD).
- the intermediate film according to the present invention is an HUD intermediate film.
- the intermediate film according to the present invention has a display corresponding area corresponding to the display area of the head-up display.
- the display corresponding area is an area where information can be displayed favorably.
- the intermediate film according to the present invention has a single-layer structure or a two-layer structure.
- the intermediate film according to the present invention may have a single-layer structure or a two-layer structure.
- the interlayer film according to the present invention may have a two-layer structure or may have a three-layer structure or more.
- the interlayer film according to the present invention may be a single-layer interlayer film or a multilayer interlayer film.
- the intermediate film according to the present invention has one end and the other end opposite to the one end.
- the one end and the other end are end portions on both sides facing each other in the intermediate film.
- the thickness of the other end is larger than the thickness of the one end.
- the amount of change in thickness at a distance of 80 mm in the direction connecting the one end and the other end centered on the point corresponding to each 2 mm interval of the display corresponding region from the one end side to the other end side Measure.
- the amount of change in thickness is measured in the display corresponding region.
- An interval of 2 mm from the end of the display corresponding region from the end on the one end side toward the other end is set as a starting point, and an end of the display corresponding region from the end on the other end side to the one end is set as an end point.
- a point is selected every time, and the amount of change in thickness at a distance of 80 mm in the direction connecting the one end and the other end with each point as the center is measured.
- the display corresponding area has a length of 500 mm from one end side to the other end side
- points are selected every 2 mm from the position of 4 mm to the position of 496 mm from one end side of the display corresponding area.
- the distance in the direction connecting the one end and the other end is centered on the point at every 2 mm interval at 247 points every 2 mm interval.
- the amount of change in thickness of 80 mm is measured, and 247 measurement values are obtained.
- the thickness change amount is measured in each region (distance 80 mm) every 2 mm. This amount of change in thickness is the absolute value of the difference between the maximum value and the minimum value of the thickness in each region (distance 80 mm) every 2 mm.
- the absolute value of the difference between the maximum value of the measured value of thickness change and the minimum value of the measured value of thickness change is 32 ⁇ m or less.
- the maximum value among the measured values of the thickness change 247 and the minimum value among the measured values of the thickness change 247 is 32 ⁇ m or less.
- the wedge angle in the region on the other end side from the display corresponding region is smaller than the wedge angle in the display corresponding region.
- the wedge angle of the display corresponding region includes a straight line connecting the first surface (one surface) portion of the display corresponding region of the maximum thickness portion and the minimum thickness portion in the display corresponding region, and the maximum thickness portion in the display corresponding region. This is the inner angle at the intersection with the straight line connecting the second surface (the other surface) portion of the display corresponding region with the minimum thickness portion.
- the wedge angle of the region on the other end side from the display corresponding region is the first wedge in the region on the other end side from the display corresponding region of the maximum thickness portion and the minimum thickness portion in the region on the other end side from the display corresponding region.
- the second surface (the other side) of the region on the other end side of the display corresponding region of the maximum thickness portion and the minimum thickness portion in the region on the other end side of the display corresponding region and the straight line connecting the surface (one surface) portion This is the inner angle at the intersection with the straight line connecting the surfaces.
- the wedge angle ⁇ of the intermediate film is shown, not the wedge angle of the display corresponding region and the wedge angle of the region on the other end side of the display corresponding region.
- the wedge angle of the display corresponding area can be obtained in the same manner as the wedge angle ⁇ in the display corresponding area R1 of FIGS.
- the wedge angle of the region on the other end side from the display corresponding region is the same as the wedge angle ⁇ in the region on the other end side (upper peripheral region R2 and shade region R3) of the display corresponding region in FIGS. Can be sought.
- the present invention since the above-described configuration is provided, it is possible to suppress both the reflection double image and the transmission double image in the laminated glass.
- the present invention when the display information is reflected from the display unit to the laminated glass, both the reflection double image and the transmission double image are suppressed.
- the wedge angle of the region on the other end side from the display corresponding region is preferably smaller than the wedge angle of the display corresponding region by 0.05 mrad or more, more preferably. Smaller than 0.1 mrad, more preferably smaller than 0.15 mrad, particularly preferably smaller than 0.2 mrad, most preferably smaller than 0.3 mrad.
- the wedge angle in the region on the other end side relative to the display corresponding region is preferably 0.7 mrad or less, more preferably 0.5 mrad or less, and further preferably 0.3 mrad or less. Especially preferably, it is 0.1 mrad or less.
- the wedge angle of the region on the other end side with respect to the display corresponding region may be 0 mrad or more, or 0.1 mrad or more.
- the thickness increases from the one end to the other end.
- the intermediate film according to the present invention has a display corresponding area corresponding to the display area of the HUD.
- the display corresponding area is an area where information can be displayed favorably.
- the intermediate film according to the present invention has a height of 59.8 cm from the one end to the other end, and from the one end to the other end. It is preferable to have the display corresponding region in the region up to the position.
- the intermediate film is It is preferable to have a portion in which the cross-sectional shape in the thickness direction is wedge-shaped.
- the interlayer film according to the present invention may have a shade region.
- the shade area may be separated from the display corresponding area.
- the shade region is provided for the purpose of preventing the driver during driving from feeling dazzled by, for example, sunlight or outdoor lighting.
- the shade region may be provided to provide heat shielding properties.
- the shade region is preferably located at the edge of the intermediate film.
- the shade region is preferably strip-shaped.
- a colorant or filler may be used to change the color and visible light transmittance.
- the colorant or filler may be included only in a partial region in the thickness direction of the intermediate film, or may be included in the entire region in the thickness direction of the intermediate film.
- the visible light transmittance of the display corresponding region is preferably 80% or more, more preferably 88% or more, and still more preferably 90% or more.
- the visible light transmittance of the display corresponding region is preferably higher than the visible light transmittance of the shade region.
- the visible light transmittance of the display corresponding region may be lower than the visible light transmittance of the shade region.
- the visible light transmittance of the display corresponding region is preferably 50% or more, more preferably 60% or more higher than the visible light transmittance of the shade region.
- the visible light transmittance when the visible light transmittance changes in the intermediate film of the display corresponding region and the shade region, the visible light transmittance is measured at the center position of the display corresponding region and the center position of the shade region.
- the visible light transmittance at a wavelength of 380 to 780 nm of the obtained laminated glass can be measured according to JIS R3211 (1998).
- the display corresponding area preferably has a length direction and a width direction. Since the intermediate film is excellent in versatility, it is preferable that the width direction of the display corresponding region is a direction connecting the one end and the other end.
- the display-corresponding region is preferably strip-shaped.
- the intermediate film preferably has an MD direction and a TD direction.
- the intermediate film is obtained by, for example, melt extrusion molding.
- the MD direction is the flow direction of the intermediate film during the production of the intermediate film.
- the TD direction is a direction orthogonal to the flow direction of the intermediate film at the time of manufacturing the intermediate film, and is a direction orthogonal to the thickness direction of the intermediate film. It is preferable that the one end and the other end are located on both sides in the TD direction.
- the MD direction and the TD direction can be confirmed by, for example, the winding direction of the intermediate film roll body. This is because, in the roll film of the intermediate film, the intermediate film is wound in the flow direction of the intermediate film at the time of manufacture, so the winding direction of the intermediate film in the roll film and the flow direction of the intermediate film in the production of the intermediate film And are the same.
- the intermediate film has a portion having a wedge-shaped cross-sectional shape in the thickness direction.
- the cross-sectional shape in the thickness direction of the display corresponding region is preferably a wedge shape.
- FIGS. 1A and 1B schematically show a cross-sectional view and a front view of an interlayer film for laminated glass according to a first embodiment of the present invention.
- FIG. 1A is a cross-sectional view taken along the line II in FIG. Note that the size and dimensions of the interlayer film in FIG. 1 and the drawings to be described later are appropriately changed from the actual size and shape for convenience of illustration.
- FIG. 1A shows a cross section in the thickness direction of the intermediate film 11.
- the thickness of each layer constituting the intermediate film and the intermediate film, and the wedge angle ⁇ are shown to be different from the actual thickness and wedge angle. .
- the intermediate film 11 includes a first layer 1 (intermediate layer), a second layer 2 (surface layer), and a third layer 3 (surface layer). On the first surface side of the first layer 1, the second layer 2 is disposed and laminated. On the second surface side opposite to the first surface of the first layer 1, the third layer 3 is disposed and laminated. The first layer 1 is arranged between the second layer 2 and the third layer 3 and is sandwiched between them.
- the intermediate film 11 is used to obtain a laminated glass.
- the intermediate film 11 is an intermediate film for laminated glass.
- the intermediate film 11 is a multilayer intermediate film.
- the intermediate film 11 has one end 11a and the other end 11b on the opposite side of the one end 11a.
- the one end 11a and the other end 11b are opposite ends on opposite sides.
- the cross-sectional shape in the thickness direction of the second layer 2 and the third layer 3 is a wedge shape.
- the cross-sectional shape in the thickness direction of the first layer 1 is a rectangle.
- the thicknesses of the second layer 2 and the third layer 3 are larger on the other end 11b side than on the one end 11a side. Therefore, the thickness of the other end 11b of the intermediate film 11 is larger than the thickness of the one end 11a. Therefore, the intermediate film 11 has a thin region and a thick region.
- the intermediate film 11 has a display corresponding region R1 corresponding to the display region of the head-up display.
- the intermediate film 11 has a peripheral region R2 next to the display corresponding region R1.
- the display corresponding region R1 is a region from a position of 10 cm from the one end 11a to the other end 11b to a position of 59.8 cm from the one end 11a to the other end 11b.
- the intermediate film 11 has a shade region R3 apart from the display corresponding region R1.
- the shade region R3 is located at the edge of the intermediate film 11.
- FIG. 4 is a perspective view schematically showing a roll body on which the interlayer film for laminated glass shown in FIG. 1 is wound.
- the intermediate film 11 may be wound to form a roll body 51 of the intermediate film 11.
- a roll body 51 shown in FIG. 4 includes a winding core 61 and an intermediate film 11.
- the intermediate film 11 is wound around the outer periphery of the winding core 61.
- FIGS. 2A and 2B schematically show a cross-sectional view and a front view of an interlayer film for laminated glass according to a second embodiment of the present invention.
- FIG. 2A is a cross-sectional view taken along the line II in FIG.
- FIG. 2A shows a cross section in the thickness direction of the intermediate film 11A.
- the intermediate film 11A shown in FIG. 2 includes the first layer 1A.
- the intermediate film 11A has a single-layer structure including only the first layer 1A, and is a single-layer intermediate film.
- the intermediate film 11A is the first layer 1A.
- the intermediate film 11A is used to obtain a laminated glass.
- the intermediate film 11A is an intermediate film for laminated glass.
- the intermediate film 11A has one end 11a and the other end 11b on the opposite side to the one end 11a.
- the one end 11a and the other end 11b are opposite ends on opposite sides.
- the thickness of the other end 11b of the intermediate film 11A is larger than the thickness of the one end 11a. Accordingly, the intermediate film 11A and the first layer 1A have a thin region and a thick region.
- the intermediate film 11A and the first layer 1A have portions 11Aa and 1Aa whose cross-sectional shape in the thickness direction is rectangular, and portions 11Ab and 1Ab whose cross-sectional shape in the thickness direction are wedge-shaped.
- the intermediate film 11A has a display corresponding region R1 corresponding to the display region of the head-up display.
- the intermediate film 11A has a peripheral region R2 next to the display corresponding region R1.
- the intermediate film 11A has a shade region R3 apart from the display corresponding region R1.
- the shade region R3 is located at the edge of the intermediate film 11A.
- the intermediate film preferably has a portion having a wedge-shaped cross-sectional shape in the thickness direction.
- the intermediate film preferably has a portion where the thickness gradually increases from one end to the other end.
- the cross-sectional shape in the thickness direction of the intermediate film is preferably a wedge shape. Examples of the cross-sectional shape in the thickness direction of the intermediate film include a trapezoid, a triangle, and a pentagon.
- the wedge angle ⁇ of the interlayer film can be appropriately set according to the attachment angle of the laminated glass.
- the wedge angle ⁇ of the interlayer film is preferably 0.2 mrad (0.0115 degrees) or more, preferably 2 mrad (0.1146 degrees) or less, more preferably 1 mrad (0 .05273 degrees) or less, more preferably 0.7 mrad (0.0401 degrees) or less.
- the wedge angle ⁇ of the intermediate film is a straight line connecting the first surface (one surface) portion of the intermediate film between the maximum thickness portion and the minimum thickness portion of the intermediate film, and the maximum thickness portion and the minimum thickness portion of the intermediate film. And the inner angle at the intersection with the straight line connecting the second surface (the other surface) portion of the intermediate film.
- the wedge angle of the display corresponding region of the intermediate film can be appropriately set according to the attachment angle of the laminated glass.
- the wedge angle of the display corresponding region of the intermediate film is preferably 0.2 mrad (0.0115 degrees) or more, preferably 2 mrad (0.1146 degrees) or less, more preferably It is 1 mrad (0.05273 degrees) or less.
- the thickness of the intermediate film is not particularly limited.
- the thickness of the intermediate film indicates the total thickness of each layer constituting the intermediate film. Therefore, in the case of the multilayer intermediate film 11, the thickness of the intermediate film indicates the total thickness of the first layer 1, the second layer 2, and the third layer 3.
- the maximum thickness of the interlayer film is preferably 0.1 mm or more, more preferably 0.25 mm or more, further preferably 0.5 mm or more, particularly preferably 0.8 mm or more, preferably 3 mm or less, more preferably 2 mm or less, still more preferably Is 1.5 mm or less.
- the intermediate film has a minimum thickness in a region of a distance of 0X to 0.2X from one end to the inside, and 0X from the other end to the inside.
- the intermediate film has a maximum thickness in a region having a distance of ⁇ 0.2X
- the intermediate film has a minimum thickness in a region having a distance of 0X to 0.1X from one end to the inside, and from the other end to the inside. It is more preferable to have the maximum thickness in a region with a distance of 0X to 0.1X.
- the intermediate film has a minimum thickness at one end and the intermediate film has a maximum thickness at the other end.
- the intermediate films 11 and 11A have a maximum thickness at the other end 11b and a minimum thickness at the one end 11a.
- the maximum thickness of the surface layer is preferably 0.001 mm or more, more preferably 0.2 mm or more, still more preferably 0.3 mm or more, preferably Is 1 mm or less, more preferably 0.8 mm or less.
- the maximum thickness of the layer (intermediate layer) disposed between the two surface layers is preferably 0.001 mm or more, more preferably 0.1 mm. More preferably, it is 0.2 mm or more, preferably 0.8 mm or less, more preferably 0.6 mm or less, and still more preferably 0.3 mm or less.
- the distance X between one end and the other end of the intermediate film is preferably 3 m or less, more preferably 2 m or less, particularly preferably 1.5 m or less, preferably 0.5 m or more, more preferably 0.8 m or more, Especially preferably, it is 1 m or more.
- the interlayer film (each layer) preferably contains a thermoplastic resin (hereinafter may be referred to as a thermoplastic resin (0)). 0)) may be included.
- the first layer preferably contains a thermoplastic resin (hereinafter may be referred to as a thermoplastic resin (1)), and as the thermoplastic resin (1), a polyvinyl acetal resin (hereinafter referred to as a polyvinyl acetal resin ( 1)) may be included.
- the second layer preferably contains a thermoplastic resin (hereinafter may be referred to as a thermoplastic resin (2)), and as the thermoplastic resin (2), a polyvinyl acetal resin (hereinafter, a polyvinyl acetal resin ( 2) may be included.
- the third layer preferably contains a thermoplastic resin (hereinafter sometimes referred to as a thermoplastic resin (3)), and as the thermoplastic resin (3), a polyvinyl acetal resin (hereinafter referred to as a polyvinyl acetal resin ( 3)) may be included.
- a thermoplastic resin hereinafter sometimes referred to as a thermoplastic resin (3)
- a polyvinyl acetal resin hereinafter referred to as a polyvinyl acetal resin ( 3)
- the thermoplastic resin (1), the thermoplastic resin (2) and the thermoplastic resin (3) may be the same or different, but the sound insulation is further enhanced.
- the polyvinyl acetal resin (1) is preferably different from the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3).
- Each of the thermoplastic resin (0), the thermoplastic resin (1), the thermoplastic resin (2), and the thermoplastic resin (3) may be used alone or in combination of two or more. May be.
- the said polyvinyl acetal resin (0), the said polyvinyl acetal resin (1), the said polyvinyl acetal resin (2), and the said polyvinyl acetal resin (3), respectively only 1 type may be used and 2 or more types are used together. May be.
- thermoplastic resin examples include polyvinyl acetal resin, ethylene-vinyl acetate copolymer resin, ethylene-acrylic acid copolymer resin, polyurethane resin, and polyvinyl alcohol resin. Thermoplastic resins other than these may be used.
- the thermoplastic resin is preferably a polyvinyl acetal resin.
- the polyvinyl acetal resin can be produced, for example, by acetalizing polyvinyl alcohol (PVA) with an aldehyde.
- PVA polyvinyl alcohol
- the polyvinyl acetal resin is preferably an acetalized product of polyvinyl alcohol.
- the polyvinyl alcohol can be obtained, for example, by saponifying polyvinyl acetate.
- the saponification degree of the polyvinyl alcohol is generally in the range of 70 to 99.9 mol%.
- the average degree of polymerization of the polyvinyl alcohol (PVA) is preferably 200 or more, more preferably 500 or more, still more preferably 1500 or more, still more preferably 1600 or more, particularly preferably 2600 or more, most preferably 2700 or more, preferably It is 5000 or less, more preferably 4000 or less, and still more preferably 3500 or less.
- the average degree of polymerization is not less than the above lower limit, the penetration resistance of the laminated glass is further enhanced.
- the average degree of polymerization is not more than the above upper limit, the intermediate film can be easily molded.
- the average degree of polymerization of the polyvinyl alcohol is determined by a method based on JIS K6726 “Testing method for polyvinyl alcohol”.
- the carbon number of the acetal group contained in the polyvinyl acetal resin is not particularly limited.
- the aldehyde used when manufacturing the said polyvinyl acetal resin is not specifically limited.
- the acetal group in the polyvinyl acetal resin preferably has 3 to 5 carbon atoms, more preferably 3 or 4. When the carbon number of the acetal group in the polyvinyl acetal resin is 3 or more, the glass transition temperature of the intermediate film is sufficiently low.
- the aldehyde is not particularly limited. In general, aldehydes having 1 to 10 carbon atoms are preferably used. Examples of the aldehyde having 1 to 10 carbon atoms include propionaldehyde, n-butyraldehyde, isobutyraldehyde, n-valeraldehyde, 2-ethylbutyraldehyde, n-hexylaldehyde, n-octylaldehyde, and n-nonylaldehyde. N-decylaldehyde, formaldehyde, acetaldehyde, benzaldehyde and the like.
- Propionaldehyde, n-butyraldehyde, isobutyraldehyde, n-hexylaldehyde or n-valeraldehyde is preferred, propionaldehyde, n-butyraldehyde or isobutyraldehyde is more preferred, and n-butyraldehyde is still more preferred.
- the said aldehyde only 1 type may be used and 2 or more types may be used together.
- the hydroxyl group content (hydroxyl group amount) of the polyvinyl acetal resin (0) is preferably 15 mol% or more, more preferably 18 mol% or more, preferably 40 mol% or less, more preferably 35 mol% or less.
- the hydroxyl group content is at least the above lower limit, the adhesive strength of the interlayer film is further increased. Further, when the hydroxyl group content is not more than the above upper limit, the flexibility of the interlayer film is increased, and the handling of the interlayer film is facilitated.
- the hydroxyl group content (hydroxyl content) of the polyvinyl acetal resin (1) is preferably 17 mol% or more, more preferably 20 mol% or more, still more preferably 22 mol% or more, preferably 28 mol% or less, more preferably. Is 27 mol% or less, more preferably 25 mol% or less, and particularly preferably 24 mol% or less.
- the hydroxyl group content is equal to or higher than the lower limit, the mechanical strength of the interlayer film is further increased.
- the hydroxyl group content of the polyvinyl acetal resin (1) is 20 mol% or more, the reaction efficiency is high and the productivity is excellent, and when it is 28 mol% or less, the sound insulation of the laminated glass is further enhanced.
- the hydroxyl group content is not more than the above upper limit, the flexibility of the interlayer film is increased, and the handling of the interlayer film is facilitated.
- the content of each hydroxyl group in the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) is preferably 25 mol% or more, more preferably 28 mol% or more, more preferably 30 mol% or more, and still more preferably. 31.5 mol% or more, more preferably 32 mol% or more, particularly preferably 33 mol% or more, preferably 38 mol% or less, more preferably 37 mol% or less, still more preferably 36.5 mol% or less, particularly preferably Is 36 mol% or less.
- the hydroxyl group content is at least the above lower limit, the adhesive strength of the interlayer film is further increased. Further, when the hydroxyl group content is not more than the above upper limit, the flexibility of the interlayer film is increased, and the handling of the interlayer film is facilitated.
- the hydroxyl group content of the polyvinyl acetal resin (1) is preferably lower than the hydroxyl group content of the polyvinyl acetal resin (2). From the viewpoint of further increasing the sound insulation, the hydroxyl group content of the polyvinyl acetal resin (1) is preferably lower than the hydroxyl group content of the polyvinyl acetal resin (3).
- the absolute value of the difference between the hydroxyl content of the polyvinyl acetal resin (3) is preferably 1 mol% or more, more preferably 5 mol% or more, still more preferably 9 mol% or more. Particularly preferred is 10 mol% or more, and most preferred is 12 mol% or more.
- the absolute value of the difference from the hydroxyl group content of the acetal resin (3) is preferably 20 mol% or less.
- the hydroxyl group content of the polyvinyl acetal resin is a value indicating the mole fraction obtained by dividing the amount of ethylene groups to which the hydroxyl group is bonded by the total amount of ethylene groups in the main chain, as a percentage.
- the amount of the ethylene group to which the hydroxyl group is bonded can be measured, for example, according to JIS K6728 “Testing method for polyvinyl butyral”.
- the degree of acetylation (acetyl group amount) of the polyvinyl acetal resin (0) is preferably 0.1 mol% or more, more preferably 0.3 mol% or more, still more preferably 0.5 mol% or more, preferably 30.
- the mol% or less more preferably 25 mol% or less, still more preferably 20 mol% or less.
- the acetylation degree is not less than the above lower limit, the compatibility between the polyvinyl acetal resin and the plasticizer is increased.
- the acetylation degree is not more than the above upper limit, the moisture resistance of the interlayer film and the laminated glass is increased.
- the degree of acetylation (acetyl group amount) of the polyvinyl acetal resin (1) is preferably 0.01 mol% or more, more preferably 0.1 mol% or more, still more preferably 7 mol% or more, still more preferably 9 It is at least mol%, preferably at most 30 mol%, more preferably at most 25 mol%, further preferably at most 24 mol%, particularly preferably at most 20 mol%.
- the acetylation degree is not less than the above lower limit, the compatibility between the polyvinyl acetal resin and the plasticizer is increased.
- the acetylation degree is not more than the above upper limit, the moisture resistance of the interlayer film and the laminated glass is increased.
- the degree of acetylation of the polyvinyl acetal resin (1) is 0.1 mol% or more and 25 mol% or less, the penetration resistance is excellent.
- Each degree of acetylation of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) is preferably 0.01 mol% or more, more preferably 0.5 mol% or more, preferably 10 mol% or less, more preferably. Is 2 mol% or less.
- the acetylation degree is not less than the above lower limit, the compatibility between the polyvinyl acetal resin and the plasticizer is increased.
- the acetylation degree is not more than the above upper limit, the moisture resistance of the interlayer film and the laminated glass is increased.
- the degree of acetylation is a value obtained by dividing the amount of ethylene groups to which the acetyl group is bonded by the total amount of ethylene groups in the main chain, as a percentage.
- the amount of ethylene group to which the acetyl group is bonded can be measured, for example, according to JIS K6728 “Testing method for polyvinyl butyral”.
- the degree of acetalization of the polyvinyl acetal resin (0) is preferably 60 mol% or more, more preferably 63 mol% or more, preferably 85 mol% or less, more preferably It is 75 mol% or less, more preferably 70 mol% or less.
- the degree of acetalization is not less than the above lower limit, the compatibility between the polyvinyl acetal resin and the plasticizer increases.
- the degree of acetalization is less than or equal to the above upper limit, the reaction time required for producing a polyvinyl acetal resin is shortened.
- the degree of acetalization of the polyvinyl acetal resin (1) is preferably 47 mol% or more, more preferably 60 mol% or more, preferably 85 mol% or less, more preferably It is 80 mol% or less, More preferably, it is 75 mol% or less.
- the degree of acetalization is not less than the above lower limit, the compatibility between the polyvinyl acetal resin and the plasticizer increases.
- the degree of acetalization is less than or equal to the above upper limit, the reaction time required for producing a polyvinyl acetal resin is shortened.
- the degree of acetalization (degree of butyralization in the case of polyvinyl butyral resin) of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) is preferably 55 mol% or more, more preferably 60 mol% or more, preferably Is 75 mol% or less, more preferably 71 mol% or less.
- degree of acetalization is not less than the above lower limit, the compatibility between the polyvinyl acetal resin and the plasticizer increases.
- the degree of acetalization is less than or equal to the above upper limit, the reaction time required for producing a polyvinyl acetal resin is shortened.
- the degree of acetalization is the value obtained by subtracting the amount of ethylene groups bonded with hydroxyl groups and the amount of ethylene groups bonded with acetyl groups from the total amount of ethylene groups of the main chain. It is a value indicating the mole fraction obtained by dividing by the percentage.
- the hydroxyl group content (hydroxyl content), acetalization degree (butyralization degree), and acetylation degree are preferably calculated from results measured by a method in accordance with JIS K6728 “Testing methods for polyvinyl butyral”. However, measurement by ASTM D1396-92 may be used.
- the polyvinyl acetal resin is a polyvinyl butyral resin
- the hydroxyl group content (hydroxyl amount), the acetalization degree (butyralization degree), and the acetylation degree are determined in accordance with JIS K6728 “Testing methods for polyvinyl butyral”. It can be calculated from the results measured by
- the interlayer film according to the present invention preferably includes a plasticizer (hereinafter, sometimes referred to as a plasticizer (0)).
- the first layer preferably contains a plasticizer (hereinafter sometimes referred to as a plasticizer (1)).
- the second layer preferably contains a plasticizer (hereinafter sometimes referred to as a plasticizer (2)).
- the third layer preferably contains a plasticizer (hereinafter may be referred to as a plasticizer (3)).
- the intermediate film particularly preferably contains a plasticizer.
- the layer containing the polyvinyl acetal resin preferably contains a plasticizer.
- the plasticizer is not particularly limited.
- a conventionally known plasticizer can be used as the plasticizer.
- As for the said plasticizer only 1 type may be used and 2 or more types may be used together.
- plasticizer examples include organic ester plasticizers such as monobasic organic acid esters and polybasic organic acid esters, and organic phosphate plasticizers such as organic phosphoric acid plasticizers and organic phosphorous acid plasticizers. .
- organic ester plasticizers are preferred.
- the plasticizer is preferably a liquid plasticizer.
- Examples of the monobasic organic acid ester include glycol esters obtained by a reaction between glycol and a monobasic organic acid.
- Examples of the glycol include triethylene glycol, tetraethylene glycol, and tripropylene glycol.
- Examples of the monobasic organic acid include butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptylic acid, n-octylic acid, 2-ethylhexylic acid, n-nonylic acid, and decylic acid.
- polybasic organic acid ester examples include ester compounds of a polybasic organic acid and an alcohol having a linear or branched structure having 4 to 8 carbon atoms.
- polybasic organic acid examples include adipic acid, sebacic acid, and azelaic acid.
- organic ester plasticizer examples include triethylene glycol di-2-ethylpropanoate, 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, dibutyl sebacate, dioctyl azelate, dibutyl carbitol adipate, ethylene glycol di-2-ethylbutyrate, 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-2-ethyl Hexanoate, dipropylene glycol di-2-ethylbutyrate, triethylene glycol di-2-eth
- organic phosphate plasticizer examples include tributoxyethyl phosphate, isodecylphenyl phosphate, triisopropyl phosphate, and the like.
- the plasticizer is preferably a diester plasticizer represented by the following formula (1).
- R1 and R2 each represents an organic group having 5 to 10 carbon atoms
- R3 represents an ethylene group, an isopropylene group or an n-propylene group
- p represents an integer of 3 to 10
- R1 and R2 in the above formula (1) are each preferably an organic group having 6 to 10 carbon atoms.
- the plasticizer preferably contains triethylene glycol di-2-ethylhexanoate (3GO) or triethylene glycol di-2-ethylbutyrate (3GH). Triethylene glycol di-2-ethylhexanoate It is more preferable to contain.
- the content of the plasticizer (0) with respect to 100 parts by weight of the thermoplastic resin (0) in the intermediate film is preferably 25 parts by weight or more, more preferably 30 parts by weight or more, preferably 100 parts by weight or less. Is 60 parts by weight or less, more preferably 50 parts by weight or less.
- the content of the plasticizer (0) is not less than the above lower limit, the penetration resistance of the laminated glass is further enhanced.
- the content of the plasticizer (0) is not more than the above upper limit, the transparency of the interlayer film is further increased.
- the content of the plasticizer (1) (hereinafter sometimes referred to as the content (1)) with respect to 100 parts by weight of the thermoplastic resin (1) is preferably 50 parts by weight or more, more preferably 55 parts by weight. More preferably, it is 60 parts by weight or more, preferably 100 parts by weight or less, more preferably 90 parts by weight or less, still more preferably 85 parts by weight or less, and particularly preferably 80 parts by weight or less.
- the content (1) is not less than the above lower limit, the flexibility of the intermediate film is increased, and the handling of the intermediate film is facilitated.
- the content (1) is not more than the above upper limit, the penetration resistance of the laminated glass is further enhanced.
- the content of the agent (3) (hereinafter sometimes referred to as “content (3)”) is preferably 10 parts by weight or more, more preferably 15 parts by weight or more, still more preferably 20 parts by weight or more, particularly preferably. Is 24 parts by weight or more, preferably 40 parts by weight or less, more preferably 35 parts by weight or less, still more preferably 32 parts by weight or less, and particularly preferably 30 parts by weight or less.
- content (2) and the content (3) are equal to or higher than the lower limit, the flexibility of the intermediate film is increased and the handling of the intermediate film is facilitated.
- the content (2) and the content (3) are not more than the upper limit, the penetration resistance of the laminated glass is further enhanced.
- the content (1) is preferably greater than the content (2), and the content (1) is preferably greater than the content (3).
- the absolute value of the difference between the content (2) and the content (1), and the difference between the content (3) and the content (1) is preferably 10 parts by weight or more, more preferably 15 parts by weight or more, and still more preferably 20 parts by weight or more.
- the absolute value of the difference between the content (2) and the content (1) and the absolute value of the difference between the content (3) and the content (1) are each preferably 80 parts by weight or less. More preferably, it is 75 weight part or less, More preferably, it is 70 weight part or less.
- the intermediate film preferably contains a heat shielding compound.
- the first layer preferably contains a heat shielding compound.
- the second layer preferably contains a heat shielding compound.
- the third layer preferably includes a heat shielding compound.
- the said heat-shielding compound only 1 type may be used and 2 or more types may be used together.
- the thermal barrier compound preferably contains at least one component X among phthalocyanine compounds, naphthalocyanine compounds and anthracocyanine compounds, or preferably contains thermal barrier particles. In this case, both the component X and the heat shielding particles may be included.
- the interlayer film preferably contains a phthalocyanine compound, a naphthalocyanine compound, or an anthracocyanine compound (hereinafter, the phthalocyanine compound, naphthalocyanine compound, and anthracocyanine compound may be referred to as component X).
- the first layer preferably contains the component X.
- the second layer preferably contains the component X.
- the third layer preferably contains the component X.
- the component X is a heat shielding compound. As for the said component X, only 1 type may be used and 2 or more types may be used together.
- the component X is not particularly limited.
- component X conventionally known phthalocyanine compounds, naphthalocyanine compounds and anthracocyanine compounds can be used.
- Examples of the component X include phthalocyanine, a derivative of phthalocyanine, naphthalocyanine, a derivative of naphthalocyanine, an anthocyanin, and an anthocyanin derivative.
- the phthalocyanine compound and the phthalocyanine derivative preferably each have a phthalocyanine skeleton.
- the naphthalocyanine compound and the naphthalocyanine derivative preferably each have a naphthalocyanine skeleton. It is preferable that each of the anthocyanin compound and the derivative of the anthracyanine has an anthracyanine skeleton.
- the component X is preferably phthalocyanine, a derivative of phthalocyanine, naphthalocyanine or a derivative of naphthalocyanine, and is preferably a phthalocyanine or a derivative of phthalocyanine. More preferred.
- the component X preferably contains a vanadium atom or a copper atom.
- the component X preferably contains a vanadium atom, and preferably contains a copper atom.
- the component X is more preferably a phthalocyanine containing a vanadium atom or a copper atom, or a phthalocyanine derivative containing a vanadium atom or a copper atom.
- the component X preferably has a structural unit in which an oxygen atom is bonded to a vanadium atom.
- the content of the component X is preferably 0.001% by weight. Or more, more preferably 0.005% by weight or more, still more preferably 0.01% by weight or more, particularly preferably 0.02% by weight or more, preferably 0.2% by weight or less, more preferably 0.1% by weight or less. Further, it is more preferably 0.05% by weight or less, particularly preferably 0.04% by weight or less.
- the content of the component X is not less than the above lower limit and not more than the above upper limit, the heat shielding property is sufficiently high and the visible light transmittance is sufficiently high.
- the visible light transmittance can be 70% or more.
- Thermal barrier particles The intermediate film preferably contains heat shielding particles.
- the first layer preferably contains the heat shielding particles.
- the second layer preferably includes the heat shielding particles.
- the third layer preferably contains the heat shielding particles.
- the heat shielding particles are heat shielding compounds. By using heat shielding particles, infrared rays (heat rays) can be effectively blocked. As for the said heat-shielding particle, only 1 type may be used and 2 or more types may be used together.
- the heat shielding particles are more preferably metal oxide particles.
- the heat shielding particles are preferably particles (metal oxide particles) formed of a metal oxide.
- Infrared rays having a wavelength longer than 780 nm longer than visible light have a smaller amount of energy than ultraviolet rays.
- infrared rays have a large thermal effect, and when infrared rays are absorbed by a substance, they are released as heat. For this reason, infrared rays are generally called heat rays.
- heat shielding particles By using the heat shielding particles, infrared rays (heat rays) can be effectively blocked.
- the heat shielding particles mean particles that can absorb infrared rays.
- heat shielding particles include aluminum-doped tin oxide particles, indium-doped tin oxide particles, antimony-doped tin oxide particles (ATO particles), gallium-doped zinc oxide particles (GZO particles), and indium-doped zinc oxide particles (IZO particles).
- Aluminum doped zinc oxide particles (AZO particles), niobium doped titanium oxide particles, sodium doped tungsten oxide particles, cesium doped tungsten oxide particles, thallium doped tungsten oxide particles, rubidium doped tungsten oxide particles, tin doped indium oxide particles (ITO particles) And metal oxide particles such as tin-doped zinc oxide particles and silicon-doped zinc oxide particles, and lanthanum hexaboride (LaB 6 ) particles. Heat shielding particles other than these may be used.
- Metal oxide particles are preferred because of their high heat ray shielding function, ATO particles, GZO particles, IZO particles, ITO particles or tungsten oxide particles are more preferred, and ITO particles or tungsten oxide particles are particularly preferred.
- tin-doped indium oxide particles (ITO particles) are preferable, and tungsten oxide particles are also preferable because they have a high heat ray shielding function and are easily available.
- the tungsten oxide particles are preferably metal-doped tungsten oxide particles.
- the “tungsten oxide particles” include metal-doped tungsten oxide particles. Specific examples of the metal-doped tungsten oxide particles include sodium-doped tungsten oxide particles, cesium-doped tungsten oxide particles, thallium-doped tungsten oxide particles, and rubidium-doped tungsten oxide particles.
- cesium-doped tungsten oxide particles are particularly preferable.
- the cesium-doped tungsten oxide particles are preferably tungsten oxide particles represented by the formula: Cs 0.33 WO 3 .
- the average particle diameter of the heat shielding particles is preferably 0.01 ⁇ m or more, more preferably 0.02 ⁇ m or more, preferably 0.1 ⁇ m or less, more preferably 0.05 ⁇ m or less.
- the average particle size is not less than the above lower limit, the heat ray shielding property is sufficiently increased.
- the average particle size is not more than the above upper limit, the dispersibility of the heat shielding particles is increased.
- the above “average particle diameter” indicates the volume average particle diameter.
- the average particle diameter can be measured using a particle size distribution measuring device (“UPA-EX150” manufactured by Nikkiso Co., Ltd.) or the like.
- Content is preferably 0.01% by weight or more, more preferably 0.1% by weight or more, still more preferably 1% by weight or more, particularly preferably 1.5% by weight or more, preferably 6% by weight or less, and more. It is preferably 5.5% by weight or less, more preferably 4% by weight or less, particularly preferably 3.5% by weight or less, and most preferably 3% by weight or less.
- the intermediate film preferably contains an alkali metal salt, an alkaline earth metal salt, or a magnesium salt (hereinafter sometimes referred to as a metal salt M). It is preferable that the intermediate film contains an alkali metal derived from the metal salt M. Derived from the metal salt M, the intermediate film preferably contains an alkaline earth metal. Derived from the metal salt M, the intermediate film preferably contains magnesium. The first layer preferably includes the metal salt M. The second layer preferably contains the metal salt M. The third layer preferably contains the metal salt M. Use of the metal salt M makes it easy to control the adhesion between the interlayer film and a laminated glass member such as a glass plate or the adhesion between the layers in the interlayer film. As for the said metal salt M, only 1 type may be used and 2 or more types may be used together.
- the metal salt M preferably contains Li, Na, K, Rb, Cs, Mg, Ca, Sr or Ba.
- the metal salt contained in the intermediate film preferably contains K or Mg.
- the metal salt M is an alkali metal salt of an organic acid having 2 to 16 carbon atoms, an alkaline earth metal salt of an organic acid having 2 to 16 carbon atoms, or a magnesium salt of an organic acid having 2 to 16 carbon atoms. Is more preferable, and it is more preferably a carboxylic acid magnesium salt having 2 to 16 carbon atoms or a carboxylic acid potassium salt having 2 to 16 carbon atoms.
- magnesium salt of carboxylic acid having 2 to 16 carbon atoms and the potassium salt of carboxylic acid having 2 to 16 carbon atoms include, but are not limited to, for example, magnesium acetate, potassium acetate, magnesium propionate, potassium propionate, 2-ethylbutyric acid
- magnesium, potassium 2-ethylbutanoate, magnesium 2-ethylhexanoate and potassium 2-ethylhexanoate examples include magnesium, potassium 2-ethylbutanoate, magnesium 2-ethylhexanoate and potassium 2-ethylhexanoate.
- the total content of Mg and K in the intermediate film containing the metal salt M or the layer containing the metal salt M (the first layer, the second layer, or the third layer) is preferably 5 ppm or more. Preferably it is 10 ppm or more, More preferably, it is 20 ppm or more, Preferably it is 300 ppm or less, More preferably, it is 250 ppm or less, More preferably, it is 200 ppm or less.
- the adhesion between the interlayer film and a laminated glass member such as a glass plate or the adhesion between each layer in the interlayer film can be controlled even better. .
- the intermediate film preferably contains an ultraviolet shielding agent.
- the first layer preferably contains an ultraviolet shielding agent.
- the second layer preferably contains an ultraviolet shielding agent.
- the third layer preferably contains an ultraviolet shielding agent.
- the ultraviolet shielding agent includes an ultraviolet absorber.
- the ultraviolet shielding agent is preferably an ultraviolet absorber.
- the ultraviolet shielding agent examples include an ultraviolet shielding agent containing a metal atom, an ultraviolet shielding agent containing a metal oxide, an ultraviolet shielding agent having a benzotriazole structure (benzotriazole compound), and an ultraviolet shielding agent having a benzophenone structure (benzophenone compound). ), UV screening agent having triazine structure (triazine compound), UV screening agent having malonate ester structure (malonic acid ester compound), UV screening agent having oxalic acid anilide structure (oxalic acid anilide compound) and benzoate structure Examples thereof include an ultraviolet shielding agent (benzoate compound).
- Examples of the ultraviolet shielding agent containing a metal atom include platinum particles, particles having platinum particles coated with silica, palladium particles, and particles having palladium particles coated with silica.
- the ultraviolet shielding agent is preferably not a heat shielding particle.
- the ultraviolet shielding agent is preferably an ultraviolet shielding agent having a benzotriazole structure, an ultraviolet shielding agent having a benzophenone structure, an ultraviolet shielding agent having a triazine structure or an ultraviolet shielding agent having a benzoate structure, more preferably a benzotriazole structure.
- an ultraviolet shielding agent having a benzotriazole structure more preferably an ultraviolet shielding agent having a benzotriazole structure.
- Examples of the ultraviolet shielding agent containing the metal oxide include zinc oxide, titanium oxide, and cerium oxide. Furthermore, the surface may be coat
- the insulating metal oxide examples include silica, alumina and zirconia.
- the insulating metal oxide has a band gap energy of 5.0 eV or more, for example.
- Examples of the ultraviolet screening agent having the benzotriazole structure include 2- (2′-hydroxy-5′-methylphenyl) benzotriazole (“TinvinP” manufactured by BASF), 2- (2′-hydroxy-3 ′, 5′-di-t-butylphenyl) benzotriazole (“Tinvin 320” manufactured by BASF), 2- (2′-hydroxy-3′-t-butyl-5-methylphenyl) -5-chlorobenzotriazole (BASF) And “Tinuvin 326” manufactured by BASF, etc.) and the like.
- the ultraviolet shielding agent is preferably an ultraviolet shielding agent having a benzotriazole structure containing a halogen atom, and is preferably an ultraviolet shielding agent having a benzotriazole structure containing a chlorine atom. More preferred.
- Examples of the ultraviolet shielding agent having the benzophenone structure include octabenzone (“Chimasorb 81” manufactured by BASF).
- UV shielding agent having the triazine structure examples include “LA-F70” manufactured by ADEKA and 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-[(hexyl). Oxy] -phenol (“Tinuvin 1577FF” manufactured by BASF) and the like.
- UV screening agent having a malonic ester structure examples include dimethyl 2- (p-methoxybenzylidene) malonate, tetraethyl-2,2- (1,4-phenylenedimethylidene) bismalonate, and 2- (p-methoxybenzylidene).
- 2- (p-methoxybenzylidene) malonate examples include dimethyl 2- (p-methoxybenzylidene) malonate, tetraethyl-2,2- (1,4-phenylenedimethylidene) bismalonate, and 2- (p-methoxybenzylidene).
- Examples of commercially available ultraviolet screening agents having a malonic ester structure include Hostavin B-CAP, Hostavin PR-25, and Hostavin PR-31 (all manufactured by Clariant).
- Examples of the ultraviolet shielding agent having the oxalic anilide structure include N- (2-ethylphenyl) -N ′-(2-ethoxy-5-tert-butylphenyl) oxalic acid diamide, N- (2-ethylphenyl)- Oxalic acid diamides having an aryl group substituted on the nitrogen atom such as N ′-(2-ethoxy-phenyl) oxalic acid diamide, 2-ethyl-2′-ethoxy-oxyanilide (“SlandorVSU” manufactured by Clariant)kind.
- ultraviolet shielding agent having the benzoate structure examples include 2,4-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate (“Tinuvin 120” manufactured by BASF). .
- the intermediate film 100% by weight or a layer containing the ultraviolet shielding agent (first layer, second layer or third layer)
- the content of the ultraviolet screening agent and the content of the benzotriazole compound are preferably 0.1% by weight or more, more preferably 0.2% by weight or more, and further preferably 0.3% by weight or more. It is particularly preferably 0.5% by weight or more, preferably 2.5% by weight or less, more preferably 2% by weight or less, still more preferably 1% by weight or less, and particularly preferably 0.8% by weight or less.
- the content of the ultraviolet shielding agent is 0.2% by weight or more, thereby reducing the visible light transmittance after the passage of the intermediate film and the laminated glass. Remarkably suppressed.
- the intermediate film preferably contains an antioxidant.
- the first layer preferably contains an antioxidant.
- the second layer preferably contains an antioxidant.
- the third layer preferably contains an antioxidant. As for the said antioxidant, only 1 type may be used and 2 or more types may be used together.
- antioxidants examples include phenol-based antioxidants, sulfur-based antioxidants, and phosphorus-based antioxidants.
- the phenolic antioxidant is an antioxidant having a phenol skeleton.
- the sulfur-based antioxidant is an antioxidant containing a sulfur atom.
- the phosphorus antioxidant is an antioxidant containing a phosphorus atom.
- the antioxidant is preferably a phenolic antioxidant or a phosphorus antioxidant.
- phenolic antioxidant examples include 2,6-di-t-butyl-p-cresol (BHT), butylhydroxyanisole (BHA), 2,6-di-t-butyl-4-ethylphenol, stearyl- ⁇ - (3,5-di-t-butyl-4-hydroxyphenyl) propionate, 2,2′-methylenebis- (4-methyl-6-butylphenol), 2,2′-methylenebis- (4-ethyl-6) -T-butylphenol), 4,4'-butylidene-bis- (3-methyl-6-t-butylphenol), 1,1,3-tris- (2-methyl-hydroxy-5-t-butylphenyl) butane Tetrakis [methylene-3- (3 ′, 5′-butyl-4-hydroxyphenyl) propionate] methane, 1,3,3-tris- (2-methyl-4-hydro) Loxy-5-t-butylphenol) butane, 1,3,5-trimethyl-2,4,6
- Examples of the phosphorus antioxidant include tridecyl phosphite, tris (tridecyl) phosphite, triphenyl phosphite, trinonylphenyl phosphite, bis (tridecyl) pentaerythritol diphosphite, bis (decyl) pentaerythritol diphos.
- antioxidants examples include “IRGANOX 245” manufactured by BASF, “IRGAFOS 168” manufactured by BASF, “IRGAFOS 38” manufactured by BASF, “Smilizer BHT” manufactured by Sumitomo Chemical Co., Ltd., and Sakai Chemical Industry Examples thereof include “H-BHT” and “IRGANOX 1010” manufactured by BASF.
- a layer in 100% by weight of the interlayer film or containing an antioxidant.
- the content of the antioxidant is preferably 0.1% by weight or more.
- the content of the antioxidant is preferably 2% by weight or less in 100% by weight of the intermediate film or 100% by weight of the layer containing the antioxidant.
- Each of the first layer, the second layer, and the third layer may be a coupling agent, a dispersant, a surfactant, a flame retardant, an antistatic agent, a pigment, a dye, a moisture resistant agent, Additives such as fluorescent brighteners and infrared absorbers may be included. As for these additives, only 1 type may be used and 2 or more types may be used together.
- FIG. 3 is a cross-sectional view showing an example of a laminated glass using the laminated glass interlayer film shown in FIG.
- the laminated glass 21 shown in FIG. 3 includes the intermediate film 11, a first laminated glass member 22, and a second laminated glass member 23.
- the intermediate film 11 is disposed between the first laminated glass member 22 and the second laminated glass member 23 and is sandwiched.
- a first laminated glass member 22 is disposed on the first surface of the intermediate film 11.
- a second laminated glass member 23 is disposed on the second surface opposite to the first surface of the intermediate film 11.
- the laminated glass member examples include a glass plate and a PET (polyethylene terephthalate) film.
- the laminated glass includes not only laminated glass in which an intermediate film is sandwiched between two glass plates, but also laminated glass in which an intermediate film is sandwiched between a glass plate and a PET film or the like.
- Laminated glass is a laminated body provided with a glass plate, and preferably at least one glass plate is used.
- the first laminated glass member and the second laminated glass member are respectively a glass plate or a PET (polyethylene terephthalate) film, and the intermediate film is the first laminated glass member and the second laminated glass member. It is preferable that at least one glass plate is included. It is particularly preferable that both the first laminated glass member and the second laminated glass member are glass plates.
- the glass plate examples include inorganic glass and organic glass.
- the inorganic glass examples include float plate glass, heat ray absorbing plate glass, heat ray reflecting plate glass, polished plate glass, mold plate glass, wire-containing plate glass, and green glass.
- the organic glass is a synthetic resin glass substituted for inorganic glass.
- the organic glass examples include polycarbonate plates and poly (meth) acrylic resin plates.
- the poly (meth) acrylic resin plate examples include a polymethyl (meth) acrylate plate.
- the thicknesses of the first laminated glass member and the second laminated glass member are not particularly limited, but are preferably 1 mm or more and preferably 5 mm or less.
- the thickness of the glass plate is preferably 1 mm or more, and preferably 5 mm or less.
- the thickness of the PET film is preferably 0.03 mm or more, and preferably 0.5 mm or less.
- the method for producing the laminated glass is not particularly limited.
- the intermediate film is sandwiched between the first and second laminated glass members, passed through a pressing roll, or put into a rubber bag and sucked under reduced pressure.
- the air which remains between the 1st laminated glass member and an intermediate film, and the 2nd laminated glass member and an intermediate film is deaerated.
- it is pre-bonded at about 70 to 110 ° C. to obtain a laminate.
- the laminate is put in an autoclave or pressed and pressed at about 120 to 150 ° C. and a pressure of 1 to 1.5 MPa. In this way, a laminated glass can be obtained.
- the laminated glass can be used for automobiles, railway vehicles, aircraft, ships, buildings, and the like.
- the laminated glass is preferably laminated glass for buildings or vehicles, and more preferably laminated glass for vehicles.
- the laminated glass can be used for other purposes.
- the laminated glass can be used for an automobile windshield, side glass, rear glass, roof glass, or the like. Since the heat shielding property is high and the visible light transmittance is high, the laminated glass is suitably used for automobiles.
- the laminated glass is a laminated glass that is a head-up display (HUD).
- measurement information such as speed transmitted from the control unit can be displayed on the windshield from the display unit of the instrument panel. For this reason, the driver
- n-butyraldehyde having 4 carbon atoms is used for acetalization.
- the degree of acetalization degree of butyralization
- the degree of acetylation degree of acetylation
- the hydroxyl group content were measured by a method based on JIS K6728 “Testing methods for polyvinyl butyral”.
- ASTM D1396-92 the same numerical value as the method based on JIS K6728 “Testing method for polyvinyl butyral” was shown.
- Example 1 Preparation of a composition for forming an interlayer film: Triethylene glycol di-2-ethyl with respect to 100 parts by weight of polyvinyl acetal resin (average polymerization degree 1700, hydroxyl group content 30.5 mol%, acetylation degree 1 mol%, acetalization degree 68.5 mol%) Hexanoate (3GO) 40 parts by weight and Tinuvin 326 (2- (2′-hydroxy-3′-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, “Tinvin 326” manufactured by BASF) 0.2 Parts by weight and 0.2 parts by weight of BHT (2,6-di-t-butyl-p-cresol) were added and kneaded sufficiently with a mixing roll to obtain a composition for forming an intermediate film. .
- polyvinyl acetal resin average polymerization degree 1700, hydroxyl group content 30.5 mol%, acetylation degree 1 mol%, acetalization
- Preparation of interlayer film The composition for forming the interlayer film was extruded using an extruder.
- the intermediate film was extruded to produce a wedge-shaped single-layer intermediate film.
- the resulting intermediate film has a minimum thickness at one end and a maximum thickness at the other end.
- the obtained intermediate film has the display corresponding region in a region from a position of 10 cm from one end to the other end to a position of 59.8 cm from one end to the other end.
- Example 2 and Comparative Examples 1 and 2 The intermediate film is extruded using a mold different from that of Example 1, and the wedge angle of the display corresponding area, the wedge angle of the other end side of the display corresponding area, and the amount of change in the thickness in the display corresponding area are as follows.
- An interlayer film for laminated glass was obtained in the same manner as in Example 1 except that the settings were made as shown in Table 1.
- Example 3 Preparation of a composition for forming the first layer: Triethylene glycol di-2-ethylhexanoate (100 parts by weight of polyvinyl acetal resin (average polymerization degree 3000, hydroxyl group content 22 mol%, acetylation degree 13 mol%, acetalization degree 65 mol%) ( 3 GO) 60 parts by weight, and Tinuvin 326 (2- (2′-hydroxy-3′-t-butyl-5-methylphenyl) -5-chlorobenzotriazole, “Tinuvin 326” manufactured by BASF) 0.2 parts by weight, 0.2 parts by weight of BHT (2,6-di-t-butyl-p-cresol) was added and kneaded sufficiently with a mixing roll to obtain a composition for forming the first layer.
- polyvinyl acetal resin average polymerization degree 3000, hydroxyl group content 22 mol%, acetylation degree 13 mol%, acetalization degree 65 mol%) (
- compositions for forming the second and third layers Triethylene glycol di-2-ethyl with respect to 100 parts by weight of polyvinyl acetal resin (average polymerization degree 1700, hydroxyl group content 30.5 mol%, acetylation degree 1 mol%, acetalization degree 68.5 mol%) 38 parts by weight of hexanoate (3GO) and Tinuvin 326 (2- (2′-hydroxy-3′-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, “Tinvin 326” manufactured by BASF) 0.2 Part by weight and 0.2 part by weight of BHT (2,6-di-t-butyl-p-cresol) are added and sufficiently kneaded with a mixing roll to form the second layer and the third layer. A composition for was obtained.
- polyvinyl acetal resin average polymerization degree 1700, hydroxyl group content 30.5 mol%, acetylation degree 1 mol%, acetalization degree 68.5
- Preparation of interlayer film The composition for forming the first layer and the composition for forming the second layer and the third layer were coextruded using a coextruder. A wedge-shaped intermediate film having a laminated structure of the second layer / first layer / third layer was produced. The resulting intermediate film has a minimum thickness at one end and a maximum thickness at the other end. The obtained intermediate film has the display corresponding region in a region from a position of 10 cm from one end to the other end to a position of 59.8 cm from one end to the other end.
- Examples 4 to 8 and Comparative Examples 3 to 6 The intermediate film is extruded using a mold different from that of Example 1, and the wedge angle of the display corresponding area, the wedge angle of the other end side of the display corresponding area, and the amount of change in the thickness in the display corresponding area are determined.
- An interlayer film for laminated glass was obtained in the same manner as in Example 3 except that the settings were made as shown in Tables 2 and 3 below.
- Double Image A pair of glass plates (clear glass, 510 mm ⁇ 910 mm size, thickness 2.0 mm) was prepared. An intermediate film having a size corresponding to the size of the glass plate was sandwiched between the pair of glass plates to obtain a laminate. The obtained laminate was fitted into an EPDM rubber tube (frame member) as shown in FIG. The width of the rubber tube is 15 mm. Next, the laminated body fitted in the EPDM rubber tube was pre-press-bonded by a vacuum bag method. Laminated glass was obtained by press-bonding the pre-bonded laminate using an autoclave at 150 ° C. and a pressure of 1.2 MPa.
- the obtained laminated glass was placed at the position of the windshield.
- Display information was reflected on the laminated glass from the display unit installed below the laminated glass, and the presence or absence of a reflected double image was visually confirmed at a predetermined position. Furthermore, the presence or absence of the transmission double image was visually confirmed by irradiating the light source from a position 7 m away from the other end side of the display area of the laminated glass. Reflected double image in the laminated glass display area (intermediate film display corresponding area) and transmission in the other end side area from the laminated glass display area (the other end side area from the intermediate film display corresponding area) A multiple image was determined according to the following criteria.
- the laminated glass using the interlayer films obtained in Examples 3 to 8 was confirmed to be excellent in sound insulation as a result of evaluating sound insulation by sound transmission loss.
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- Engineering & Computer Science (AREA)
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- Joining Of Glass To Other Materials (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
中間膜(各層)は、熱可塑性樹脂(以下、熱可塑性樹脂(0)と記載することがある)を含むことが好ましく、熱可塑性樹脂(0)として、ポリビニルアセタール樹脂(以下、ポリビニルアセタール樹脂(0)と記載することがある)を含むことが好ましい。上記第1の層は、熱可塑性樹脂(以下、熱可塑性樹脂(1)と記載することがある)を含むことが好ましく、熱可塑性樹脂(1)として、ポリビニルアセタール樹脂(以下、ポリビニルアセタール樹脂(1)と記載することがある)を含むことが好ましい。上記第2の層は、熱可塑性樹脂(以下、熱可塑性樹脂(2)と記載することがある)を含むことが好ましく、熱可塑性樹脂(2)として、ポリビニルアセタール樹脂(以下、ポリビニルアセタール樹脂(2)と記載することがある)を含むことが好ましい。上記第3の層は、熱可塑性樹脂(以下、熱可塑性樹脂(3)と記載することがある)を含むことが好ましく、熱可塑性樹脂(3)として、ポリビニルアセタール樹脂(以下、ポリビニルアセタール樹脂(3)と記載することがある)を含むことが好ましい。上記熱可塑性樹脂(1)と上記熱可塑性樹脂(2)と上記熱可塑性樹脂(3)とは、同一であってもよく、異なっていてもよいが、遮音性がより一層高くなることから、上記熱可塑性樹脂(1)は、上記熱可塑性樹脂(2)及び上記熱可塑性樹脂(3)と異なっていることが好ましい。上記ポリビニルアセタール樹脂(1)と上記ポリビニルアセタール樹脂(2)と上記ポリビニルアセタール樹脂(3)とは、同一であってもよく、異なっていてもよいが、遮音性がより一層高くなることから、上記ポリビニルアセタール樹脂(1)は、上記ポリビニルアセタール樹脂(2)及び上記ポリビニルアセタール樹脂(3)と異なっていることが好ましい。上記熱可塑性樹脂(0)、上記熱可塑性樹脂(1)、上記熱可塑性樹脂(2)及び上記熱可塑性樹脂(3)はそれぞれ、1種のみが用いられてもよく、2種以上が併用されてもよい。上記ポリビニルアセタール樹脂(0)、上記ポリビニルアセタール樹脂(1)、上記ポリビニルアセタール樹脂(2)及び上記ポリビニルアセタール樹脂(3)はそれぞれ、1種のみが用いられてもよく、2種以上が併用されてもよい。
中間膜の接着力をより一層高める観点からは、本発明に係る中間膜は、可塑剤(以下、可塑剤(0)と記載することがある)を含むことが好ましい。上記第1の層は、可塑剤(以下、可塑剤(1)と記載することがある)を含むことが好ましい。上記第2の層は、可塑剤(以下、可塑剤(2)と記載することがある)を含むことが好ましい。上記第3の層は、可塑剤(以下、可塑剤(3)と記載することがある)を含むことが好ましい。中間膜に含まれている熱可塑性樹脂が、ポリビニルアセタール樹脂である場合に、中間膜(各層)は、可塑剤を含むことが特に好ましい。ポリビニルアセタール樹脂を含む層は、可塑剤を含むことが好ましい。
上記中間膜は、遮熱性化合物を含むことが好ましい。上記第1の層は、遮熱性化合物を含むことが好ましい。上記第2の層は、遮熱性化合物を含むことが好ましい。上記第3の層は、遮熱性化合物を含むことが好ましい。上記遮熱性化合物は、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記中間膜は、フタロシアニン化合物、ナフタロシアニン化合物又はアントラシアニン化合物(以下、フタロシアニン化合物、ナフタロシアニン化合物及びアントラシアニン化合物を成分Xと呼ぶことがある)を含むことが好ましい。上記第1の層は、上記成分Xを含むことが好ましい。上記第2の層は、上記成分Xを含むことが好ましい。上記第3の層は、上記成分Xを含むことが好ましい。上記成分Xは遮熱性化合物である。上記成分Xは、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記中間膜は、遮熱粒子を含むことが好ましい。上記第1の層は、上記遮熱粒子を含むことが好ましい。上記第2の層は、上記遮熱粒子を含むことが好ましい。上記第3の層は、上記遮熱粒子を含むことが好ましい。上記遮熱粒子は遮熱性化合物である。遮熱粒子の使用により、赤外線(熱線)を効果的に遮断できる。上記遮熱粒子は、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記中間膜は、アルカリ金属塩、アルカリ土類金属塩、又はマグネシウム塩(以下、これらを金属塩Mと記載することがある)を含むことが好ましい。上記金属塩Mに由来して、上記中間膜は、アルカリ金属を含むことが好ましい。上記金属塩Mに由来して、上記中間膜は、アルカリ土類金属を含むことが好ましい。上記金属塩Mに由来して、上記中間膜は、マグネシウムを含むことが好ましい。上記第1の層は、上記金属塩Mを含むことが好ましい。上記第2の層は、上記金属塩Mを含むことが好ましい。上記第3の層は、上記金属塩Mを含むことが好ましい。上記金属塩Mの使用により、中間膜とガラス板などの合わせガラス部材との接着性又は中間膜における各層間の接着性を制御することが容易になる。上記金属塩Mは、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記中間膜は、紫外線遮蔽剤を含むことが好ましい。上記第1の層は、紫外線遮蔽剤を含むことが好ましい。上記第2の層は、紫外線遮蔽剤を含むことが好ましい。上記第3の層は、紫外線遮蔽剤を含むことが好ましい。紫外線遮蔽剤の使用により、中間膜及び合わせガラスが長期間使用されても、可視光線透過率がより一層低下し難くなる。上記紫外線遮蔽剤は、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記中間膜は、酸化防止剤を含むことが好ましい。上記第1の層は、酸化防止剤を含むことが好ましい。上記第2の層は、酸化防止剤を含むことが好ましい。上記第3の層は、酸化防止剤を含むことが好ましい。上記酸化防止剤は、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記第1の層、上記第2の層及び上記第3の層はそれぞれ、必要に応じて、カップリング剤、分散剤、界面活性剤、難燃剤、帯電防止剤、顔料、染料、耐湿剤、蛍光増白剤及び赤外線吸収剤等の添加剤を含んでいてもよい。これらの添加剤は、1種のみが用いられてもよく、2種以上が併用されてもよい。
図3は、図1に示す合わせガラス用中間膜を用いた合わせガラスの一例を示す断面図である。
中間膜を形成するための組成物の作製:
ポリビニルアセタール樹脂(平均重合度1700、水酸基の含有率30.5モル%、アセチル化度1モル%、アセタール化度68.5モル%)100重量部に対して、トリエチレングリコールジ-2-エチルヘキサノエート(3GO)40重量部と、Tinuvin326(2-(2’-ヒドロキシ-3’-t-ブチル-5-メチルフェニル)-5-クロロベンゾトリアゾール、BASF社製「Tinuvin326」)0.2重量部と、BHT(2,6-ジ-t-ブチル-p-クレゾール)0.2重量部とを添加し、ミキシングロールで充分に混練し、中間膜を形成するための組成物を得た。
中間膜を形成するための組成物を、押出機を用いて押出した。実施例1では、中間膜を押出成形して、楔状の単層の中間膜を作製した。得られた中間膜は、一端に最小厚みを有し、他端に最大厚みを有する。また、得られた中間膜は、一端から他端に向けて10cmの位置から、一端から他端に向けて59.8cmの位置までの領域に、上記表示対応領域を有する。
実施例1とは異なる金型を用い中間膜を押出成形し、表示対応領域の楔角、表示対応領域よりも他端側の領域の楔角、及び表示対応領域での厚みの変化量を下記の表1に示すように設定したこと以外は実施例1と同様にして、合わせガラス用中間膜を得た。
第1の層を形成するための組成物の作製:
ポリビニルアセタール樹脂(平均重合度3000、水酸基の含有率22モル%、アセチル化度13モル%、アセタール化度65モル%)100重量部に対して、トリエチレングリコールジ-2-エチルヘキサノエート(3GO)60重量部と、Tinuvin326(2-(2’-ヒドロキシ-3’-t-ブチル-5-メチルフェニル)-5-クロロベンゾトリアゾール、BASF社製「Tinuvin326」)0.2重量部と、BHT(2,6-ジ-t-ブチル-p-クレゾール)0.2重量部とを添加し、ミキシングロールで充分に混練し、第1の層を形成するための組成物を得た。
ポリビニルアセタール樹脂(平均重合度1700、水酸基の含有率30.5モル%、アセチル化度1モル%、アセタール化度68.5モル%)100重量部に対して、トリエチレングリコールジ-2-エチルヘキサノエート(3GO)38重量部と、Tinuvin326(2-(2’-ヒドロキシ-3’-t-ブチル-5-メチルフェニル)-5-クロロベンゾトリアゾール、BASF社製「Tinuvin326」)0.2重量部と、BHT(2,6-ジ-t-ブチル-p-クレゾール)0.2重量部とを添加し、ミキシングロールで充分に混練し、第2の層及び第3の層を形成するための組成物を得た。
第1の層を形成するための組成物と、第2の層及び第3の層を形成するための組成物とを、共押出機を用いて共押出した。第2の層/第1の層/第3の層の積層構造を有する楔状の中間膜を作製した。得られた中間膜は、一端に最小厚みを有し、他端に最大厚みを有する。また、得られた中間膜は、一端から他端に向けて10cmの位置から、一端から他端に向けて59.8cmの位置までの領域に、上記表示対応領域を有する。
実施例1とは異なる金型を用いて中間膜を押出成形し、表示対応領域の楔角、表示対応領域よりも他端側の領域の楔角、及び表示対応領域での厚みの変化量を下記の表2,3に示すように設定したこと以外は実施例3と同様にして、合わせガラス用中間膜を得た。
(0)厚み
得られた中間膜において、中間膜の一端から14cmの位置から55.8cmの位置までで、2mm間隔毎に地点を選択し、各地点を中心とする上記一端と上記他端とを結ぶ方向の距離80mmでの厚みの変化量を測定した。それぞれの厚み変化量の値のうちの最大値(厚み変化量の最大値)と最小値(厚み変化量の最小値)とを評価した。厚み変化量の最大値と厚み変化量の最小値との差の絶対値を求めた。
一対のガラス板(クリアガラス、510mm×910mmの大きさ、厚み2.0mm)を用意した。一対のガラス板の間に、ガラス板の大きさに対応する大きさの中間膜を挟み込んで、積層体を得た。得られた積層体を、図5に示すように、EPDM製ゴムチューブ(枠部材)にはめ込んだ。ゴムチューブの幅は15mmである。次に、EPDM製ゴムチューブにはめ込まれた積層体を真空バッグ法により、予備圧着した。予備圧着された積層体を、オートクレーブを用いて、150℃及び1.2MPaの圧力で圧着することにより、合わせガラスを得た。
○:反射二重像が確認されない
×:反射二重像が確認される
○:透過二重像が確認されない
×:透過二重像が確認される
1Aa…厚み方向の断面形状が矩形である部分
1Ab…厚み方向の断面形状が楔状である部分
2…第2の層
3…第3の層
11,11A…中間膜
11a…一端
11b…他端
11Aa…厚み方向の断面形状が矩形である部分
11Ab…厚み方向の断面形状が楔状である部分
21…合わせガラス
22…第1の合わせガラス部材
23…第2の合わせガラス部材
51…ロール体
61…巻き芯
R1…表示対応領域
R2…周辺領域
R3…シェード領域
Claims (13)
- ヘッドアップディスプレイである合わせガラスに用いられる合わせガラス用中間膜であって、
ヘッドアップディスプレイの表示領域に対応する表示対応領域を有し、
一端と、前記一端の反対側に他端とを有し、前記他端の厚みが、前記一端の厚みよりも大きく、
前記一端側から前記他端側にかけて前記表示対応領域の2mm間隔毎の地点を中心とする前記一端と前記他端とを結ぶ方向の距離80mmでの厚みの変化量を測定したときに、厚み変化量の測定値の最大値と、厚み変化量の測定値の最小値との差の絶対値が32μm以下であり、
前記表示対応領域よりも前記他端側の領域の楔角が、前記表示対応領域の楔角よりも小さい、合わせガラス用中間膜。 - 前記表示対応領域よりも前記他端側の領域の楔角が、前記表示対応領域の楔角よりも、0.05mrad以上小さい、請求項1に記載の合わせガラス用中間膜。
- 前記一端から前記他端に向けて10cmの位置から、前記一端から前記他端に向けて59.8cmの位置までの領域に、前記表示対応領域を有する、請求項1又は2に記載の合わせガラス用中間膜。
- 前記表示対応領域よりも前記他端側の領域の楔角が0.7mrad以下である、請求項1~3のいずれか1項に記載の合わせガラス用中間膜。
- 前記表示対応領域よりも前記他端側の領域の楔角が0.5mrad以下である、請求項4に記載の合わせガラス用中間膜。
- 前記表示対応領域よりも前記他端側の領域の楔角が0.3mrad以下である、請求項5に記載の合わせガラス用中間膜。
- 前記表示対応領域よりも前記他端側の領域の楔角が0.1mrad以下である、請求項6に記載の合わせガラス用中間膜。
- 熱可塑性樹脂を含む、請求項1~7のいずれか1項に記載の合わせガラス用中間膜。
- 可塑剤を含む、請求項1~8のいずれか1項に記載の合わせガラス用中間膜。
- 第1の層と、
前記第1の層の第1の表面側に配置された第2の層とを備える、請求項1~9のいずれか1項に記載の合わせガラス用中間膜。 - 前記第1の層が、ポリビニルアセタール樹脂を含み、
前記第2の層が、ポリビニルアセタール樹脂を含み、
前記第1の層中の前記ポリビニルアセタール樹脂の水酸基の含有率が、前記第2の層中の前記ポリビニルアセタール樹脂の水酸基の含有率よりも低い、請求項10に記載の合わせガラス用中間膜。 - 前記第1の層が、ポリビニルアセタール樹脂を含み、
前記第2の層が、ポリビニルアセタール樹脂を含み、
前記第1の層が、可塑剤を含み、
前記第2の層が、可塑剤を含み、
前記第1の層中の前記ポリビニルアセタール樹脂100重量部に対する前記第1の層中の前記可塑剤の含有量が、前記第2の層中の前記ポリビニルアセタール樹脂100重量部に対する前記第2の層中の前記可塑剤の含有量よりも多い、請求項10又は11に記載の合わせガラス用中間膜。 - 第1の合わせガラス部材と、
第2の合わせガラス部材と、
請求項1~12のいずれか1項に記載の合わせガラス用中間膜とを備え、
前記第1の合わせガラス部材と前記第2の合わせガラス部材との間に、前記合わせガラス用中間膜が配置されている、合わせガラス。
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MX2018011722A MX2018011722A (es) | 2016-03-30 | 2017-03-29 | Capa intermedia para vidrio laminado y vidrio laminado. |
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US16/086,587 US11298919B2 (en) | 2016-03-30 | 2017-03-29 | Interlayer for laminated glass, and laminated glass |
JP2017518580A JP6949710B2 (ja) | 2016-03-30 | 2017-03-29 | 合わせガラス用中間膜及び合わせガラス |
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