TW201718429A - Interlayer film for laminated glass, and laminated glass - Google Patents

Interlayer film for laminated glass, and laminated glass Download PDF

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Publication number
TW201718429A
TW201718429A TW105128665A TW105128665A TW201718429A TW 201718429 A TW201718429 A TW 201718429A TW 105128665 A TW105128665 A TW 105128665A TW 105128665 A TW105128665 A TW 105128665A TW 201718429 A TW201718429 A TW 201718429A
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Taiwan
Prior art keywords
laminated glass
display
region
intermediate film
display corresponding
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TW105128665A
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Chinese (zh)
Inventor
Etsurou Hirota
Hiromitsu Nishino
Koji Kumakura
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Sekisui Chemical Co Ltd
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Publication of TW201718429A publication Critical patent/TW201718429A/en

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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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10018—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising only one glass sheet
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10559—Shape of the cross-section
    • B32B17/10568—Shape of the cross-section varying in thickness
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10651—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising colorants, e.g. dyes or pigments
    • 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
    • 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
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Laminated Bodies (AREA)
  • Instrument Panels (AREA)

Abstract

Provided is an interlayer film for laminated glass with which it is possible to easily recognize the display correspondence region of the interlayer film corresponding to the display region of a head-up display when obtaining laminated glass, more accurately position the display correspondence region of the interlayer film on the display region of a head-up display in laminated glass, and display information well in a head-up display. The interlayer film for laminated glass according to the present invention includes a thermoplastic resin, has one end and another end thicker than the one end on the side opposite the one end, has a display correspondence region corresponding to the display region of a head-up display, and makes it possible to visually distinguish the display correspondence region from the surrounding region adjacent to the display correspondence region, or the color or glossiness of the display correspondence region differs from the color or glossiness of the surrounding region adjacent to the display correspondence region.

Description

層合玻璃用中間膜及層合玻璃Intermediate film and laminated glass for laminated glass

本發明係關於一種用以獲得層合玻璃之層合玻璃用中間膜。又，本發明係關於一種使用上述層合玻璃用中間膜之層合玻璃。The present invention relates to an intermediate film for laminated glass for obtaining laminated glass. Further, the present invention relates to a laminated glass using the above interlayer film for laminated glass.

層合玻璃即便受到外部衝擊而破損，玻璃之破片之飛散量亦較少，安全性優異。因此，上述層合玻璃廣泛地用於汽車、軌道車輛、飛機、船舶及建築物等中。上述層合玻璃係藉由於一對玻璃板之間夾入層合玻璃用中間膜而製造。 作為汽車中所使用之上述層合玻璃，已知有抬頭顯示器(HUD)。關於HUD，可使汽車之擋風玻璃顯示汽車之行駛資料即速度等計測資訊等。 關於上述HUD，有於擋風玻璃中所顯示之計測資訊可見雙重影之問題。 為了抑制雙重影像，於下述專利文獻1中，揭示有於一對玻璃板之間夾入有具有特定之楔角之楔狀中間膜的層合玻璃。於此種層合玻璃中，藉由調整中間膜之楔角，可將經一個玻璃板所反射之計測資訊之顯示、與經另一個玻璃板所反射之計測資訊之顯示於駕駛者之視野中連結為1點。因此，不易使計測資訊之顯示看見雙重影，而不易妨礙駕駛者之視野。 [先前技術文獻] [專利文獻] [專利文獻1]日本專利特表平4-502525號公報Even if the laminated glass is damaged by an external impact, the amount of scattering of the glass is small, and the safety is excellent. Therefore, the above laminated glass is widely used in automobiles, rail vehicles, airplanes, ships, buildings, and the like. The laminated glass is produced by sandwiching an interlayer film for laminated glass between a pair of glass sheets. A head-up display (HUD) is known as the above-mentioned laminated glass used in automobiles. Regarding the HUD, the windshield of the car can be used to display the driving information of the car, that is, the measurement information such as the speed. Regarding the above HUD, there is a problem that the measurement information displayed in the windshield can be seen as a double shadow. In order to suppress a double image, Patent Document 1 listed below discloses a laminated glass in which a wedge-shaped intermediate film having a specific wedge angle is interposed between a pair of glass sheets. In the laminated glass, by adjusting the wedge angle of the intermediate film, the display of the measurement information reflected by one glass plate and the measurement information reflected by the other glass plate can be displayed in the driver's field of vision. The link is 1 point. Therefore, it is difficult to make the display of the measurement information see a double shadow, and it is not easy to hinder the driver's vision. [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent Laid-Open No. 4-502525

[發明所欲解決之問題] 於楔狀之中間膜中，有藉由楔角等而使中間膜本身存在於HUD中可良好地顯示計測資訊之區域、與於HUD中無法良好地顯示計測資訊之其他區域之情況。中間膜之可顯示計測資訊之區域為與HUD之顯示區域對應之顯示對應區域。 例如，於擋風玻璃等之HUD中，於下部顯示資訊之情況較多。又，根據車型及安裝場所等而決定HUD之顯示區域之情況較多。 又，夾入中間膜之前之玻璃板係根據車型及安裝場所等而具有特定之大小。因此，玻璃板係於特定之區域具有HUD之顯示對應區域。於夾入中間膜之前之玻璃板中，位於HUD之顯示區域之部分已決定、且玻璃板之顯示對應區域已決定之情況較多。 於先前之楔狀之中間膜中，有於製作層合玻璃時難以使中間膜之顯示對應區域與玻璃板之顯示對應區域一致之情況，有產生該等顯示對應區域間之位置偏移之情況。又，有中間膜之顯示對應區域不位於作為所獲得之層合玻璃之HUD之顯示區域，而無法於HUD中良好地顯示計測資訊之中間膜之其他區域位於HUD之顯示區域的情況。 結果為，於作為所獲得之層合玻璃的HUD之顯示區域中，計測資訊可看見雙重影，或計測資訊本身無法可讀取地顯示。 另一方面，例如可一面測定楔角而確認等，一面掌握中間膜之顯示對應區域之位置，而製作層合玻璃。然而，層合玻璃之製造效率大幅降低。 本發明之目的在於提供一種可於獲得層合玻璃時，容易地識別與抬頭顯示器之顯示區域對應的中間膜之顯示對應區域，使中間膜之顯示對應區域更進一步確實地位於層合玻璃之抬頭顯示器之顯示區域，並於抬頭顯示器中良好地顯示資訊的層合玻璃用中間膜。又，本發明之目的亦在於提供一種使用上述之層合玻璃用中間膜之層合玻璃。 [解決問題之技術手段] 根據本發明之廣泛態樣，提供一種層合玻璃用中間膜，其係用於作為抬頭顯示器之層合玻璃者，且包含熱塑性樹脂，具有一端、及於與上述一端相反側具有比上述一端更大之厚度之另一端，具有與抬頭顯示器之顯示區域對應之顯示對應區域，且上述顯示對應區域、與鄰接於上述顯示對應區域之周圍區域可藉由目視而識別，或上述顯示對應區域之色或光澤度與鄰接於上述顯示對應區域之周圍區域之色或光澤度不同。 於本發明之層合玻璃用中間膜之某特定態樣中，上述顯示對應區域之色或光澤度與鄰接於上述顯示對應區域之周圍區域之色或光澤度不同，於另一特定態樣中，上述顯示對應區域之色與鄰接於該顯示對應區域之區域之色不同。 於本發明之層合玻璃用中間膜之某特定態樣中，於上述顯示對應區域中，厚度自上述一端朝向上述另一端發生變化。 於本發明之層合玻璃用中間膜之某特定態樣中，上述層合玻璃用中間膜具有厚度方向之截面形狀為楔狀之部分。 於本發明之層合玻璃用中間膜之某特定態樣中，上述顯示對應區域具有長度方向與寬度方向，且上述顯示對應區域之寬度方向係將上述一端與上述另一端連結之方向。 於本發明之層合玻璃用中間膜之某特定態樣中，上述顯示對應區域之可見光透過率為80%以上。 於本發明之層合玻璃用中間膜之某特定態樣中，上述層合玻璃用中間膜遠離上述顯示對應區域而具有遮蔽區域。 於本發明之層合玻璃用中間膜之某特定態樣中，上述熱塑性樹脂為聚乙烯醇縮醛樹脂。 於本發明之層合玻璃用中間膜之某特定態樣中，上述層合玻璃用中間膜包含塑化劑。 根據本發明之廣泛態樣，提供一種層合玻璃，其具備第1層合玻璃構件、第2層合玻璃構件、及上述層合玻璃用中間膜，且上述層合玻璃用中間膜配置於上述第1層合玻璃構件與上述第2層合玻璃構件之間。 [發明之效果] 本發明之層合玻璃用中間膜由於包含熱塑性樹脂，具有一端、及於與上述一端相反側具有比上述一端更大之厚度之另一端，具有與抬頭顯示器之顯示區域對應之顯示對應區域，且上述顯示對應區域、與鄰接於上述顯示對應區域之周圍區域可藉由目視而識別，或上述顯示對應區域之色或光澤度與鄰接於上述顯示對應區域之周圍區域之色或光澤度不同，故而於獲得層合玻璃時，可容易地識別與抬頭顯示器之顯示區域對應之中間膜之顯示對應區域。進而，於所獲得之層合玻璃中，可使中間膜之顯示對應區域更進一步確實地位於抬頭顯示器之顯示區域。因此，可於抬頭顯示器中良好地顯示資訊。[Problem to be Solved by the Invention] In the wedge-shaped intermediate film, the intermediate film itself exists in the HUD by the wedge angle or the like, and the measurement information can be satisfactorily displayed, and the measurement information cannot be displayed well in the HUD. The situation in other areas. The area of the intermediate film that can display the measurement information is the display corresponding area corresponding to the display area of the HUD. For example, in a HUD such as a windshield, information is often displayed in the lower portion. Moreover, the display area of the HUD is often determined depending on the vehicle type, the installation location, and the like. Further, the glass plate before being sandwiched between the intermediate films has a specific size depending on the vehicle type, the installation location, and the like. Therefore, the glass plate has a display corresponding area of the HUD in a specific area. In the glass plate before the interlayer film is sandwiched, the portion of the display area of the HUD has been determined, and the corresponding area of the display of the glass plate has been determined. In the case of the conventional wedge-shaped intermediate film, it is difficult to make the display corresponding region of the intermediate film coincide with the display corresponding region of the glass plate when the laminated glass is produced, and there is a case where the positional shift between the display corresponding regions occurs. . Further, the display corresponding region of the intermediate film is not located in the display region of the HUD of the obtained laminated glass, and the other region of the intermediate film in which the measurement information cannot be satisfactorily displayed in the HUD is located in the display region of the HUD. As a result, in the display area of the HUD as the obtained laminated glass, the measurement information can be seen as a double shadow, or the measurement information itself cannot be readablely displayed. On the other hand, for example, the wedge angle can be measured and confirmed, and the position of the display corresponding region of the intermediate film can be grasped to produce a laminated glass. However, the manufacturing efficiency of laminated glass is greatly reduced. An object of the present invention is to provide a display corresponding region of an intermediate film which can easily recognize a display region corresponding to a display area of a head-up display when a laminated glass is obtained, and to make the display corresponding region of the intermediate film more reliably located on the riser of the laminated glass. An interlayer film for laminated glass that displays the information in the display area and displays the information well in the head-up display. Moreover, an object of the present invention is to provide a laminated glass using the above-mentioned interlayer film for laminated glass. [Technical means for solving the problem] According to a broad aspect of the present invention, an interlayer film for laminated glass is provided for use as a laminated glass for a head-up display, and comprises a thermoplastic resin having one end and one end The opposite side has a thickness larger than the one end, and has a display corresponding area corresponding to the display area of the head-up display, and the display corresponding area and the surrounding area adjacent to the display corresponding area can be visually recognized. Or the color or gloss of the corresponding display area is different from the color or gloss of the surrounding area adjacent to the display corresponding area. In a specific aspect of the interlayer film for laminated glass according to the present invention, the color or gloss of the display corresponding region is different from the color or gloss of the peripheral region adjacent to the display corresponding region, and in another specific aspect. The color of the corresponding display area is different from the color of the area adjacent to the display corresponding area. In a specific aspect of the interlayer film for laminated glass according to the present invention, in the display corresponding region, the thickness changes from the one end toward the other end. In a specific aspect of the interlayer film for laminated glass according to the present invention, the interlayer film for laminated glass has a wedge-shaped cross-sectional shape in the thickness direction. In a specific aspect of the interlayer film for laminated glass according to the present invention, the display corresponding region has a longitudinal direction and a width direction, and a width direction of the display corresponding region is a direction in which the one end is coupled to the other end. In a specific aspect of the interlayer film for laminated glass according to the present invention, the visible light transmittance of the display corresponding region is 80% or more. In a specific aspect of the interlayer film for laminated glass according to the present invention, the interlayer film for laminated glass has a shielding region away from the display corresponding region. In a specific aspect of the interlayer film for laminated glass according to the present invention, the thermoplastic resin is a polyvinyl acetal resin. In a specific aspect of the interlayer film for laminated glass of the present invention, the interlayer film for laminated glass contains a plasticizer. According to a broad aspect of the present invention, there is provided a laminated glass comprising: a first laminated glass member, a second laminated glass member, and the intermediate film for laminated glass, wherein the laminated glass intermediate film is disposed on the laminated film The first laminated glass member is interposed between the first laminated glass member and the second laminated glass member. [Effects of the Invention] The intermediate film for laminated glass according to the present invention comprises a thermoplastic resin, and has one end and the other end having a thickness larger than the one end on the side opposite to the one end, and has a display area corresponding to the display area of the head-up display. Displaying a corresponding area, wherein the display corresponding area and the surrounding area adjacent to the display corresponding area are visually recognized, or the color or gloss of the display corresponding area and the color of the surrounding area adjacent to the display corresponding area or Since the gloss is different, when the laminated glass is obtained, the display corresponding region of the intermediate film corresponding to the display region of the head-up display can be easily recognized. Further, in the obtained laminated glass, the display corresponding region of the intermediate film can be more reliably positioned in the display region of the head-up display. Therefore, the information can be displayed well in the head-up display.

以下，說明本發明之詳細內容。 本發明之層合玻璃用中間膜(於本說明書中，有時簡記為「中間膜」)係用於作為抬頭顯示器(HUD)之層合玻璃。本發明之中間膜係HUD用中間膜。 本發明之中間膜具有一層之構造或兩層以上之構造。本發明之中間膜可具有一層之構造，亦可具有兩層以上之構造。本發明之中間膜可具有兩層之構造，亦可具有三層以上之構造。本發明之中間膜可為單層之中間膜，亦可為多層之中間膜。 本發明之中間膜包含熱塑性樹脂。 本發明之中間膜具有一端、及於與上述一端相反側具有比上述一端更大之厚度之另一端。於本發明之中間膜中，與一端相比，另一端較厚。上述一端與上述另一端係於中間膜中相對向之兩側之端部。 本發明之中間膜具有與HUD之顯示區域對應之顯示對應區域。上述顯示對應區域係可良好地顯示資訊之區域。 於本發明之中間膜中，上述顯示對應區域、與鄰接於上述顯示對應區域之周圍區域可藉由目視而識別，或上述顯示對應區域之色或光澤度與鄰接於上述顯示對應區域之周圍區域之色或光澤度不同。 由於本發明之中間膜具備上述之構成，故而於獲得層合玻璃時，可容易地識別與HUD之顯示區域對應之中間膜之顯示對應區域。因此，可使特定大小之層合玻璃構件之顯示對應區域(與所獲得之層合玻璃之顯示對應區域對應之區域)、與中間膜之顯示對應區域容易地對位，可防止該等區域間之位置偏移。因此，可使中間膜之顯示對應區域更進一步確實地位於所獲得之層合玻璃之HUD之顯示區域。結果為，可使HUD難以令資訊可見雙重影而良好地顯示資訊。 與具有固定厚度之中間膜相比，於具有一端、及於與上述一端相反側具有比上述一端更大之厚度之另一端之中間膜(楔狀之中間膜等)中，中間膜之顯示對應區域之對位較為重要，相對於此，於本案發明中，可更進一步確實地進行對位。 又，由於可容易地識別中間膜之顯示對應區域，故而於製作層合玻璃時，無需對HUD之顯示對應區域藉由測定等而預先進行特定之作業。因此，可顯著提高層合玻璃之製造效率。 又，根據車型及安裝場所等而玻璃板之顯示對應區域之位置不同之情況較多，相對於此，即便於獲得複數種層合玻璃之情形時，亦可容易地識別出中間膜之顯示對應區域，故而可有效率地使中間膜之顯示對應區域位於玻璃板之顯示對應區域，而顯著提高層合玻璃之製造效率。 於本發明之中間膜中，上述顯示對應區域、與鄰接於上述顯示對應區域之周圍區域亦可藉由目視而識別。於本發明之中間膜中，上述顯示對應區域之色或光澤度亦可與鄰接於上述顯示對應區域之周圍區域之色或光澤度不同。藉由上述顯示對應區域之色或光澤度與鄰接於上述顯示對應區域之周圍區域之色或光澤度不同，而鄰接於上述顯示對應區域之周圍區域亦可藉由目視而識別。由於顯示對應區域之識別性更進一步優異，故而可無損中間膜本來之功能而容易地製作中間膜，因此較佳為上述顯示對應區域之色與鄰接於上述顯示對應區域之周圍區域之色不同。由於顯示對應區域之識別性更進一步優異，故而亦較佳為上述顯示對應區域之光澤度與鄰接於上述顯示對應區域之周圍區域之光澤度不同。 上述顯示對應區域、與鄰接於上述顯示對應區域之周圍區域是否可藉由目視而識別係如下般進行判斷。 以具有普通視力(例如視力1.0)者對中間膜之主面於垂直方向上自距離70 cm之位置進行目視時是否可識別來進行判斷。 就使顯示更進一步良好之觀點而言，較佳為於上述顯示對應區域中厚度自上述一端朝向上述另一端發生變化。就使顯示更進一步良好之觀點而言，較佳為於上述顯示對應區域中自上述一端朝向上述另一端厚度增加。 本發明之中間膜亦可具有遮蔽區域。上述遮蔽區域亦可與上述顯示對應區域分離。上述遮蔽區域係以防止例如因太陽光線或屋外照明等而運轉中之驅動器令人感到晃眼等為目的而設計。上述遮蔽區域亦有為了賦予隔熱性而設置之情況。上述遮蔽區域較佳為位於中間膜之緣部。上述遮蔽區域較佳為帶狀。 就使顯示更進一步良好、使視野更進一步開闊之觀點而言，上述顯示對應區域之可見光透過率較佳為80%以上，更佳為88%以上，進而較佳為90%以上。 上述顯示對應區域之可見光透過率較佳為高於上述遮蔽區域之可見光透過率。上述顯示對應區域之可見光透過率亦可低於上述遮蔽區域之可見光透過率。上述顯示對應區域之可見光透過率與上述遮蔽區域之可見光透過率相比，較佳為高50%以上，更佳為高60%以上。上述顯示對應區域之可見光透過率較佳為低於上述周圍區域之可見光透過率。上述顯示對應區域之可見光透過率與上述周圍區域之可見光透過率相比，較佳為較低，較佳為低1%以上，更佳為低5%以上，進而較佳為低10%以上。 再者，例如於在顯示對應區域及遮蔽區域之中間膜可見光透過率發生變化之情形時，於顯示對應區域之中心位置及遮蔽區域之中心位置測定可見光透過率。 可使用分光光度計(日立高新技術公司製造之「U-4100」)，依據JIS R3211(1998)，測定所獲得之層合玻璃於波長380～780 nm下之上述可見光透過率。再者，作為玻璃板，較佳為使用厚度2 mm之透明玻璃。 於遮蔽區域及顯示對應區域，為了使色及可見光透過率發生變化，亦可使用著色劑或填充劑。著色劑或填充劑可僅包含於中間膜之厚度方向之一部分區域中，亦可包含於中間膜之厚度方向之整個區域中。 上述顯示對應區域較佳為具有長度方向與寬度方向。由於中間膜之通用性優異，故而較佳為上述顯示對應區域之寬度方向為將上述一端與上述另一端連結之方向。上述顯示對應區域較佳為帶狀。 上述中間膜較佳為具有MD(Machine direction，加工方向)方向與TD(Transverse Direction，橫向方向)方向。中間膜例如可藉由熔融擠出成形而獲得。MD方向係中間膜製造時之中間膜之行進方向。TD方向係中間膜製造時與中間膜之行進方向正交之方向，且該方向與中間膜之厚度方向正交。較佳為上述一端與上述另一端位於TD方向之兩側。 就使顯示更進一步良好之觀點而言，中間膜較佳為具有厚度方向之截面形狀為楔狀之部分。較佳為顯示對應區域之厚度方向之截面形狀為楔狀。 由於能夠控制光澤度等，故而較佳為於顯示對應區域，中間膜於兩側之表面內之至少一個表面具有凹凸形狀。更佳為於顯示對應區域，中間膜於兩側之表面具有凹凸形狀。較佳為上述顯示對應區域之凹凸形狀與上述周圍區域之凹凸形狀不同。 作為形成上述之凹凸形狀之方法，並無特別限定，例如可列舉：模唇壓紋法、壓紋輥法、砑光輥法、及異形擠出法等。由於能夠定量地形成作為固定凹凸花樣之大量凹凸形狀之壓紋，故而較佳為壓紋輥法。上述中間膜較佳為藉由壓紋輥法而對表面進行壓紋加工。 以下，一面參照圖式，一面對本發明之具體實施形態進行說明。 於圖1(a)及(b)中，以剖視圖及前視圖模式性地表示本發明之第1實施形態之層合玻璃用中間膜。圖1(a)係沿著圖1(b)中之I-I線之剖視圖。再者，圖1及下述圖中之中間膜之大小及尺寸係為了圖示之方便而自實際之大小及形狀適宜變更。 於圖1(a)中，表示中間膜11之厚度方向之剖面。再者，於圖1(a)及下述之圖中，為了圖示之方便，中間膜及構成中間膜之各層之厚度、及楔角θ係以與實際之厚度及楔角不同之方式表示。 中間膜11具備：第1層1(中間層)、第2層2(表面層)、及第3層3(表面層)。於第1層1之第1表面側，配置第2層2，並積層。於第1層1之與第1表面相反之第2表面側，配置第3層3，並積層。第1層1係配置於第2層2與第3層3之間，並夾入。中間膜11係用以獲得層合玻璃。中間膜11係層合玻璃用中間膜。中間膜11係多層中間膜。 中間膜11具有一端11a、及於一端11a之相反側具有另一端11b。一端11a與另一端11b係相對向之兩側之端部。第2層2及第3層3之厚度方向之截面形狀為楔狀。第1層1之厚度方向之截面形狀為矩形。第2層2及第3層3之厚度係另一端11b側大於一端11a側。因此，中間膜11之另一端11b之厚度大於一端11a之厚度。因此，中間膜11具有厚度較薄之區域、與厚度較厚之區域。 中間膜11具有與抬頭顯示器之顯示區域對應之顯示對應區域R1。顯示對應區域R1、與鄰接於顯示對應區域R1之周圍區域R2可藉由目視而識別，或顯示對應區域R1之色或光澤度與鄰接於顯示對應區域R1之周圍區域R2之色或光澤度不同。 中間膜11係遠離顯示對應區域R1而具有遮蔽區域R3。遮蔽區域R3係位於中間膜11之緣部。 於圖2(a)及(b)中，以剖視圖及前視圖模式性地表示本發明之第2實施形態之層合玻璃用中間膜。圖2(a)係沿著圖2(b)中之I-I線之剖視圖。於圖2(a)中，表示中間膜11A之厚度方向之剖面。 圖2中所示之中間膜11A具備第1層1A。中間膜11A具有僅第1層1A之一層構造，為單層之中間膜。中間膜11A係第1層1A。中間膜11A係用以獲得層合玻璃。中間膜11A係層合玻璃用中間膜。 中間膜11A具有一端11a、及於與一端11a相反側具有另一端11b。一端11a與另一端11b係相對向之兩側之端部。中間膜11A之另一端11b之厚度大於一端11a之厚度。因此，中間膜11A及第1層1A具有厚度較薄之區域、與厚度較厚之區域。 中間膜11A及第1層1A具有厚度方向之截面形狀為矩形之部分11Aa、1Aa與厚度方向之截面形狀為楔狀之部分11Ab、1Ab。 中間膜11A具有與抬頭顯示器之顯示區域對應之顯示對應區域R1。顯示對應區域R1、與鄰接於顯示對應區域R1之周圍區域R2可藉由目視而識別，或顯示對應區域R1之色或光澤度與鄰接於顯示對應區域R1之周圍區域R2之色或光澤度不同。 中間膜11A遠離顯示對應區域R1而具有遮蔽區域R3。遮蔽區域R3係位於中間膜11A之緣部。 上述中間膜較佳為具有厚度方向之截面形狀為楔狀之部分。上述中間膜較佳為具有自一端朝向另一端厚度逐漸增大之部分。中間膜之厚度方向之截面形狀較佳為楔狀。作為中間膜之厚度方向之截面形狀，可列舉：梯形、三角形及五角形等。 為了抑制雙重影像，可根據層合玻璃之安裝角度而適宜設定中間膜之楔角θ。就更進一步抑制雙重影像之觀點而言，中間膜之楔角θ較佳為0.01 mrad(0.0006度)以上，更佳為0.2 mrad(0.0115度)以上，較佳為2 mrad(0.1146度)以下，更佳為0.7 mrad(0.0401度)以下。上述楔角θ係將最大厚度部分與最小厚度部分之中間膜之第1表面部分連結之直線、與將最大厚度部分與最小厚度部分之中間膜之第2表面部分連結之直線之交點上之內角。 上述中間膜之厚度並無特別限定。上述中間膜之厚度係表示構成中間膜之各層之合計之厚度。因此，於多層之中間膜11之情形時，該中間膜之厚度係表示第1層1與第2層2與第3層3之合計之厚度。 中間膜之最大厚度較佳為0.1 mm以上，更佳為0.25 mm以上，進而較佳為0.5 mm以上，尤佳為0.8 mm以上，較佳為3 mm以下，更佳為2 mm以下，進而較佳為1.5 mm以下。 於將一端與另一端之間之距離設為X時，中間膜較佳為自一端朝向內側於0X～0.2X之距離之區域具有最小厚度，自另一端朝向內側於0X～0.2X之距離之區域具有最大厚度，中間膜更佳為自一端朝向內側於0X～0.1X之距離之區域具有最小厚度，自另一端朝向內側於0X～0.1X之距離之區域具有最大厚度。較佳為中間膜於一端具有最小厚度，中間膜於另一端具有最大厚度。中間膜11、11A於另一端11b具有最大厚度，於一端11a具有最小厚度。 就實用方面之觀點、及充分提高接著力及耐貫通性之觀點而言，表面層之最大厚度較佳為0.001 mm以上，更佳為0.2 mm以上，進而較佳為0.3 mm以上，較佳為1 mm以下，更佳為0.8 mm以下。 就實用方面之觀點、及充分提高耐貫通性之觀點而言，配置於兩個表面層之間之層(中間層)之厚度之最大厚度為0.001 mm以上，更佳為0.1 mm以上，進而較佳為0.2 mm以上，較佳為0.8 mm以下，更佳為0.6 mm以下，進而較佳為0.3 mm以下。 以下，對構成多層之中間膜之各層、及單層之中間膜之材料之詳細內容進行說明。 (熱塑性樹脂) 本發明之中間膜(各層)所含之熱塑性樹脂並無特別限定。作為上述熱塑性樹脂，可使用先前公知之熱塑性樹脂。上述熱塑性樹脂可僅使用一種，亦可並用兩種以上。 作為上述熱塑性樹脂，可列舉：聚乙烯醇縮醛樹脂、乙烯-乙酸乙烯酯共聚物樹脂、乙烯-丙烯酸系共聚物樹脂、聚胺基甲酸酯樹脂及聚乙烯醇樹脂等。亦可使用該等以外之熱塑性樹脂。 上述熱塑性樹脂較佳為聚乙烯醇縮醛樹脂。藉由並用聚乙烯醇縮醛樹脂與塑化劑，可使本發明之中間膜對層合玻璃構件或其他中間膜之接著力更進一步提高。 上述聚乙烯醇縮醛樹脂例如可藉由將聚乙烯醇(PVA)藉由醛進行縮醛化而製造。上述聚乙烯醇縮醛樹脂較佳為聚乙烯醇之縮醛化物。上述聚乙烯醇例如可藉由使聚乙酸乙烯酯進行皂化而製造。上述聚乙烯醇之皂化度通常為70～99.9莫耳%之範圍內。 上述聚乙烯醇之平均聚合度較佳為200以上，更佳為500以上，更進一步較佳為1500以上，進而較佳為1600以上，尤佳為2600以上，最佳為2700以上，較佳為5000以下，更佳為4000以下，進而較佳為3500以下。若上述平均聚合度為上述下限以上，則層合玻璃之耐貫通性更進一步提高。若上述平均聚合度為上述上限以下，則中間膜之成形變得容易。 上述聚乙烯醇之平均聚合度可藉由依據JIS K6726「聚乙烯醇試驗方法」之方法而求出。 上述聚乙烯醇縮醛樹脂中所含之縮醛基之碳數並無特別限定。製造上述聚乙烯醇縮醛樹脂時所使用之醛並無特別限定。上述聚乙烯醇縮醛樹脂中之縮醛基之碳數較佳為3或4。若上述聚乙烯醇縮醛樹脂中之縮醛基之碳數為3以上，則中間膜之玻璃轉移溫度充分降低。 上述醛並無特別限定。通常較佳地使用碳數為1～10之醛。作為上述碳數為1～10之醛，例如可列舉：丙醛、正丁醛、異丁醛、正戊醛、2-乙基丁醛、正己醛、正辛醛、正壬醛、正癸醛、甲醛、乙醛及苯甲醛等。較佳為丙醛、正丁醛、異丁醛、正己醛或正戊醛，更佳為丙醛、正丁醛或異丁醛，進而較佳為正丁醛。上述醛可使用僅一種，亦可並用兩種以上。 上述聚乙烯醇縮醛樹脂之羥基之含有率(羥基量)較佳為15莫耳%以上，更佳為18莫耳%以上，較佳為40莫耳%以下，更佳為35莫耳%以下。若上述羥基之含有率為上述下限以上，則中間膜之接著力更進一步提高。又，若上述羥基之含有率為上述上限以下，則中間膜之柔軟性提高，中間膜之操作變得容易。 上述聚乙烯醇縮醛樹脂之羥基之含有率係將鍵結有羥基之伸乙基量除以主鏈之總伸乙基量所求出之莫耳分率以百分率表示之值。上述鍵結有羥基之伸乙基量例如可藉由依據JIS K6728「聚乙烯醇縮丁醛試驗方法」或依據ASTM D1396-92進行測定而求出。 上述聚乙烯醇縮醛樹脂之乙醯化度(乙醯基量)較佳為0.1莫耳%以上，更佳為0.3莫耳%以上，進而較佳為0.5莫耳%以上，較佳為30莫耳%以下，更佳為25莫耳%以下，進而較佳為20莫耳%以下。若上述乙醯化度為上述下限以上，則聚乙烯醇縮醛樹脂與塑化劑之相溶性提高。若上述乙醯化度為上述上限以下，則中間膜及層合玻璃之耐濕性提高。 上述乙醯化度係將自主鏈之總伸乙基量減去鍵結有縮醛基之伸乙基量與鍵結有羥基之伸乙基量所得之值除以主鏈之總伸乙基量所求出之莫耳分率以百分率表示之值。上述鍵結有縮醛基之伸乙基量例如可依據JIS K6728「聚乙烯醇縮丁醛試驗方法」或依據ASTM D1396-92進行測定。 上述聚乙烯醇縮醛樹脂之縮醛化度(於聚乙烯醇縮丁醛樹脂之情形時為丁醛化度)較佳為60莫耳%以上，更佳為63莫耳%以上，較佳為85莫耳%以下，更佳為75莫耳%以下，進而較佳為70莫耳%以下。若上述縮醛化度為上述下限以上，則聚乙烯醇縮醛樹脂與塑化劑之相溶性提高。若上述縮醛化度為上述上限以下，則為了製造聚乙烯醇縮醛樹脂所需之反應時間縮短。 上述縮醛化度係將鍵結有縮醛基之伸乙基量除以主鏈之總伸乙基量所求出之莫耳分率以百分率所表示之值。 上述縮醛化度可藉由依據JIS K6728「聚乙烯醇縮丁醛試驗方法」之方法或依據ASTM D1396-92之方法而算出。 再者，上述羥基之含有率(羥基量)、縮醛化度(丁醛化度)及乙醯化度較佳為由藉由依據JIS K6728「聚乙烯醇縮丁醛試驗方法」之方法所測得之結果而算出。於聚乙烯醇縮醛樹脂為聚乙烯醇縮丁醛樹脂之情形時，上述羥基之含有率(羥基量)、縮醛化度(丁醛化度)及乙醯化度較佳為由藉由依據JIS K6728「聚乙烯醇縮丁醛試驗方法」之方法所測得之結果而算出。 (塑化劑) 就更進一步提高中間膜之接著力之觀點而言，本發明之中間膜(各層)較佳為包含塑化劑。於中間膜中所含之熱塑性樹脂為聚乙烯醇縮醛樹脂之情形時，中間膜(各層)尤佳為包含塑化劑。包含聚乙烯醇縮醛樹脂之層較佳為包含塑化劑。 上述塑化劑並無特別限定。作為上述塑化劑，可使用先前公知之塑化劑。上述塑化劑可使用僅一種，亦可並用兩種以上。 作為上述塑化劑，例如可列舉：一元性有機酸酯及多元性有機酸酯等有機酯塑化劑、及有機磷酸塑化劑及有機亞磷酸塑化劑等有機磷酸塑化劑等。較佳為有機酯塑化劑。上述塑化劑較佳為液狀塑化劑。 作為上述一元性有機酸酯，並無特別限定，例如可列舉：藉由二醇與一元性有機酸之反應所獲得之二醇酯、及三乙二醇或三丙二醇與一元性有機酸之酯等。作為上述二醇，可列舉：三乙二醇、四乙二醇及三丙二醇等。作為上述一元性有機酸，可列舉：丁酸、異丁酸、己酸、2-乙基丁酸、庚酸、正辛酸、2-乙基己酸、正壬酸及癸酸等。 作為上述多元性有機酸酯，並無特別限定，例如可列舉：多元性有機酸與具有碳數4～8之直鏈或支鏈結構之醇之酯化合物。作為上述多元性有機酸，可列舉：己二酸、癸二酸及壬二酸等。 作為上述有機酯塑化劑，並無特別限定，可列舉：三乙二醇二-2-乙基丁酸酯、三乙二醇二-2-乙基己酸酯、三乙二醇二辛酸酯、三乙二醇二正辛酸酯、三乙二醇二正戊酸酯、四乙二醇二正戊酸酯、癸二酸二丁酯、壬二酸二辛酯、二丁基卡必醇己二酸酯、乙二醇二-2-乙基丁酸酯、1,3-丙二醇二-2-乙基丁酸酯、1,4-丁二醇二-2-乙基丁酸酯、二乙二醇二-2-乙基丁酸酯、二乙二醇二-2-乙基己酸酯、二丙二醇二-2-乙基丁酸酯、三乙二醇二-2-乙基戊酸酯、四乙二醇二-2-乙基丁酸酯、二乙二醇二辛酸酯、己二酸二己酯、己二酸二辛酯、己二酸己基環己酯、己二酸庚酯與己二酸壬酯之混合物、己二酸二異壬酯、己二酸二異癸酯、己二酸庚基壬酯、癸二酸二丁酯、油改性癸二酸醇酸、及磷酸酯與己二酸酯之混合物等。亦可使用該等以外之有機酯塑化劑。 作為上述有機磷酸塑化劑，並無特別限定，例如可列舉：磷酸三丁氧基乙酯、磷酸異癸基苯酯及磷酸三異丙酯等。 上述塑化劑較佳為下述式(1)所表示之雙酯塑化劑。 [化1]上述式(1)中，R1及R2分別表示碳數5～10之有機基，R3表示伸乙基、伸異丙基或伸正丙基，p表示3～10之整數。上述式(1)中之R1及R2分別較佳為碳數6～10之有機基。 上述塑化劑較佳為包含三乙二醇二-2-乙基己酸酯(3GO)或三乙二醇二-2-乙基丁酸酯(3GH)，更佳為包含三乙二醇二-2-乙基己酸酯。 上述塑化劑之含量並無特別限定。於各層中，相對於上述熱塑性樹脂100重量份，上述塑化劑之含量較佳為25重量份以上，更佳為30重量份以上，較佳為100重量份以下，更佳為60重量份以下，進而較佳為50重量份以下。若上述塑化劑之含量為上述下限以上，則層合玻璃之耐貫通性更進一步提高。若上述塑化劑之含量為上述上限以下，則中間膜之透明性更進一步提高。 (隔熱性化合物) 上述中間膜較佳為包含隔熱性化合物。上述第1層較佳為包含隔熱性化合物。上述第2層較佳為包含隔熱性化合物。上述第3層較佳為包含隔熱性化合物。上述隔熱性化合物可使用僅一種，亦可並用兩種以上。 成分X： 上述中間膜較佳為包含酞菁化合物、萘酚菁化合物及蒽酞菁(anthracyanine)化合物內之至少一種之成分X。上述第1層較佳為包含上述成分X。上述第2層較佳為包含上述成分X。上述第3層較佳為包含上述成分X。上述成分X係隔熱性化合物。上述成分X可使用僅一種，亦可並用兩種以上。 上述成分X並無特別限定。作為成分X，可使用先前公知之酞菁化合物、萘酚菁化合物及蒽酞菁化合物。 作為上述成分X，可列舉：酞菁、酞菁之衍生物、萘酚菁、萘酚菁之衍生物、蒽酞菁及蒽酞菁之衍生物等。上述酞菁化合物及上述酞菁之衍生物分別較佳為具有酞菁骨架。上述萘酚菁化合物及上述萘酚菁之衍生物分別較佳為具有萘酚菁骨架。上述蒽酞菁化合物及上述蒽酞菁之衍生物分別較佳為具有蒽酞菁骨架。 就更進一步提高中間膜及層合玻璃之隔熱性之觀點而言，上述成分X較佳為選自由酞菁、酞菁之衍生物、萘酚菁及萘酚菁之衍生物所組成之群中之至少一種，更佳為酞菁及酞菁之衍生物內之至少一種。 就有效地提高隔熱性、且持續長時間以更高之等級維持可見光透過率之觀點而言，上述成分X較佳為含有釩原子或銅原子。上述成分X較佳為含有釩原子，亦較佳為含有銅原子。上述成分X更佳為含有釩原子或銅原子之酞菁及含有釩原子或銅原子之酞菁之衍生物內之至少一種。就更進一步提高中間膜及層合玻璃之隔熱性之觀點而言，上述成分X較佳為具有於釩原子鍵結有氧原子之結構單元。 包含上述成分X之層(第1層、第2層或第3層)100重量%中，上述成分X之含量較佳為0.001重量%以上，更佳為0.005重量%以上，進而較佳為0.01重量%以上，尤佳為0.02重量%以上，較佳為0.2重量%以下，更佳為0.1重量%以下，進而較佳為0.05重量%以下，尤佳為0.04重量%以下。若上述成分X之含量為上述下限以上及上述上限以下，則隔熱性充分提高，且可見光透過率充分提高。例如，可將可見光透過率設為70%以上。 隔熱粒子： 上述中間膜較佳為包含隔熱粒子。上述第1層較佳為包含上述隔熱粒子。上述第2層較佳為包含上述隔熱粒子。上述第3層較佳為包含上述隔熱粒子。上述隔熱粒子係隔熱性化合物。藉由使用隔熱粒子，可有效地遮斷紅外線(熱射線)。上述隔熱粒子可使用僅一種，亦可並用兩種以上。 就更進一步提高層合玻璃之隔熱性之觀點而言，上述隔熱粒子更佳為金屬氧化物粒子。上述隔熱粒子較佳為由金屬之氧化物所形成之粒子(金屬氧化物粒子)。 比可見光長之波長780 nm以上之紅外線與紫外線相比，能量之量較小。然而，紅外線之熱作用較大，若紅外線被物質吸收，則以熱之形式釋放。因此，紅外線通常被稱為熱射線。藉由使用上述隔熱粒子，可有效地遮斷紅外線(熱射線)。再者，所謂隔熱粒子，意指可吸收紅外線之粒子。 作為上述隔熱粒子之具體例，可列舉：摻雜有鋁之氧化錫粒子、摻雜有銦之氧化錫粒子、摻雜有銻之氧化錫粒子(ATO粒子)、摻雜有鎵之氧化鋅粒子(GZO粒子)、摻雜有銦之氧化鋅粒子(IZO粒子)、摻雜有鋁之氧化鋅粒子(AZO粒子)、摻雜有鈮之氧化鈦粒子、摻雜有鈉之氧化鎢粒子、摻雜有銫之氧化鎢粒子、摻雜有鉈之氧化鎢粒子、摻雜有銣之氧化鎢粒子、摻雜有錫之氧化銦粒子(ITO粒子)、摻雜有錫之氧化鋅粒子、摻雜有矽之氧化鋅粒子等金屬氧化物粒子、或六硼化鑭(LaB6 )粒子等。亦可使用該等以外之隔熱粒子。由於熱射線之遮蔽功能較高，故而較佳為金屬氧化物粒子，更佳為ATO粒子、GZO粒子、IZO粒子、ITO粒子或氧化鎢粒子，尤佳為ITO粒子或氧化鎢粒子。尤其由於熱射線之遮蔽功能較高、且獲取較為容易，故而較佳為摻雜有錫之氧化銦粒子(ITO粒子)，亦較佳為氧化鎢粒子。 就更進一步提高中間膜及層合玻璃之隔熱性之觀點而言，氧化鎢粒子較佳為摻雜有金屬之氧化鎢粒子。於上述「氧化鎢粒子」中，包括摻雜有金屬之氧化鎢粒子。作為上述摻雜有金屬之氧化鎢粒子，具體而言，可列舉：摻雜有鈉之氧化鎢粒子、摻雜有銫之氧化鎢粒子、摻雜有鉈之氧化鎢粒子及摻雜有銣之氧化鎢粒子等。 就更進一步提高中間膜及層合玻璃之隔熱性之觀點而言，尤佳為摻雜有銫之氧化鎢粒子。就更進一步提高中間膜及層合玻璃之隔熱性之觀點而言，該摻雜有銫之氧化鎢粒子較佳為式：Cs0.33 WO3 所表示之氧化鎢粒子。 上述隔熱粒子之平均粒徑較佳為0.01 μm以上，更佳為0.02 μm以上，較佳為0.1 μm以下，更佳為0.05 μm以下。若平均粒徑為上述下限以上，則熱射線之遮蔽性充分提高。若平均粒徑為上述上限以下，則隔熱粒子之分散性提高。 上述「平均粒徑」表示體積平均粒徑。平均粒徑可使用粒度分佈測定裝置(日機裝公司製造之「UPA-EX150」)等進行測定。 包含上述隔熱粒子之層(第1層、第2層或第3層)100重量%中，上述隔熱粒子之各含量(尤其氧化鎢粒子之含量)較佳為0.01重量%以上，更佳為0.1重量%以上，進而較佳為1重量%以上，尤佳為1.5重量%以上，較佳為6重量%以下，更佳為5.5重量%以下，進而較佳為4重量%以下，尤佳為3.5重量%以下，最佳為3重量%以下。若上述隔熱粒子之含量為上述下限以上及上述上限以下，則隔熱性充分提高，且可見光透過率充分提高。 (金屬鹽) 上述中間膜較佳為包含鹼金屬鹽及鹼土金屬鹽內之至少1種之金屬鹽(以下，有時記載為金屬鹽M)。上述第1層較佳為包含上述金屬鹽M。上述第2層較佳為包含上述金屬鹽M。上述第3層較佳為包含上述金屬鹽M。藉由使用上述金屬鹽M，而控制中間膜與玻璃板之接著性或中間膜中之各層間之接著性變得容易。上述金屬鹽M可使用僅一種，亦可並用兩種以上。 上述金屬鹽M較佳為包含選自由Li、Na、K、Rb、Cs、Mg、Ca、Sr及Ba所組成之群中之至少1種之金屬。中間膜中所含之金屬鹽較佳為包含K及Mg內之至少1種之金屬。 又，上述金屬鹽M較佳為碳數2～16之有機酸之鹼金屬鹽或碳數2～16之有機酸之鹼土金屬鹽，進而較佳為碳數2～16之羧酸鎂鹽或碳數2～16之羧酸鉀鹽。 作為上述碳數2～16之羧酸鎂鹽及上述碳數2～16之羧酸鉀鹽，並無特別限定，例如可列舉：乙酸鎂、乙酸鉀、丙酸鎂、丙酸鉀、2-乙基丁酸鎂、2-乙基丁酸鉀、2-乙基己酸鎂及2-乙基己酸鉀等。 包含上述金屬鹽M之層(第1層、第2層或第3層)中之Mg及K之含量之合計較佳為5 ppm以上，更佳為10 ppm以上，進而較佳為20 ppm以上，較佳為300 ppm以下，更佳為250 ppm以下，進而較佳為200 ppm以下。若Mg及K之含量之合計為上述下限以上及上述上限以下，則可更進一步良好地控制中間膜與玻璃板之接著性或中間膜中之各層間之接著性。 (紫外線遮蔽劑) 上述中間膜較佳為包含紫外線遮蔽劑。上述第1層較佳為包含紫外線遮蔽劑。上述第2層較佳為包含紫外線遮蔽劑。上述第3層較佳為包含紫外線遮蔽劑。藉由使用紫外線遮蔽劑，而即便長時間使用中間膜及層合玻璃，可見光透過率亦難以更進一步降低。上述紫外線遮蔽劑可使用僅一種，亦可並用兩種以上。 於上述紫外線遮蔽劑中，包含紫外線吸收劑。上述紫外線遮蔽劑較佳為紫外線吸收劑。 作為上述紫外線遮蔽劑，例如可列舉：金屬系紫外線遮蔽劑、金屬氧化物系紫外線遮蔽劑、苯并三唑系紫外線遮蔽劑(苯并三唑化合物)、二苯甲酮系紫外線遮蔽劑(二苯甲酮化合物)、三系紫外線遮蔽劑(三化合物)、丙二酸酯系紫外線遮蔽劑(丙二酸酯化合物)、草醯苯胺系紫外線遮蔽劑(草醯苯胺化合物)及苯甲酸酯系紫外線遮蔽劑(苯甲酸酯化合物)等。 作為上述金屬系紫外線吸收劑，例如可列舉：鉑粒子、鉑粒子之表面被氧化矽被覆之粒子、鈀粒子及鈀粒子之表面被氧化矽被覆之粒子等。紫外線遮蔽劑較佳為並非隔熱粒子。 上述紫外線遮蔽劑較佳為苯并三唑系紫外線遮蔽劑、二苯甲酮系紫外線遮蔽劑、三系紫外線遮蔽劑或苯甲酸酯系紫外線遮蔽劑，更佳為苯并三唑系紫外線遮蔽劑或二苯甲酮系紫外線遮蔽劑，進而較佳為苯并三唑系紫外線吸收劑。 作為上述金屬氧化物系紫外線吸收劑，例如可列舉：氧化鋅、氧化鈦及氧化鈰等。進而，關於上述金屬氧化物系紫外線吸收劑，表面亦可經被覆。作為上述金屬氧化物系紫外線吸收劑之表面之被覆材料，可列舉：絕緣性金屬氧化物、水解性有機矽化合物及聚矽氧化合物等。 作為上述絕緣性金屬氧化物，可列舉：氧化矽、氧化鋁及氧化鋯等。上述絕緣性金屬氧化物例如具有5.0 eV以上之帶隙能量。 作為上述苯并三唑系紫外線吸收劑，例如可列舉：2-(2'-羥基-5'-甲基苯基)苯并三唑(BASF公司製造之「TinuvinP」)、2-(2'-羥基-3',5'-二-第三丁基苯基)苯并三唑(BASF公司製造之「Tinuvin320」)、2-(2'-羥基-3'-第三丁基-5-甲基苯基)-5-氯苯并三唑(BASF公司製造之「Tinuvin326」)、及2-(2'-羥基-3',5'-二-戊基苯基)苯并三唑(BASF公司製造之「Tinuvin328」)等苯并三唑系紫外線吸收劑。就吸收紫外線之性能優異而言，上述紫外線遮蔽劑較佳為包含鹵素原子之苯并三唑系紫外線吸收劑，更佳為包含氯原子之苯并三唑系紫外線吸收劑。 作為上述二苯甲酮系紫外線吸收劑，例如可列舉：辛苯酮(BASF公司製造之「Chimassorb81」)等。 作為上述三系紫外線吸收劑，例如可列舉：ADEKA公司製造之「LA-F70」及2-(4,6-二苯基-1,3,5-三-2-基)-5-[(己基)氧基]-苯酚(BASF公司製造之「Tinuvin1577FF」)等。 作為上述丙二酸酯系紫外線遮蔽劑，可列舉：2-(對甲氧基苯亞甲基)丙二酸二甲酯、2,2-(1,4-苯二亞甲基)雙丙二酸四乙酯、2-(對甲氧基苯亞甲基)-雙(1,2,2,6,6-五甲基4-哌啶基)丙二酸酯等。 作為上述丙二酸酯系紫外線遮蔽劑之市售品，可列舉：Hostavin B-CAP、Hostavin PR-25、Hostavin PR-31(均為Clariant公司製造)。 作為上述草醯苯胺系紫外線遮蔽劑，可列舉：N-(2-乙基苯基)-N'-(2-乙氧基-5-第三丁基苯基)草酸二醯胺、N-(2-乙基苯基)-N'-(2-乙氧基-苯基)草酸二醯胺、2-乙基-2'-乙氧基-氧基醯苯胺(Clariant公司製造之「SanduvorVSU」)等具有取代在氮原子上之芳基等之草酸二醯胺類。 作為上述苯甲酸酯系紫外線吸收劑，例如可列舉：2,4-二-第三丁基苯基-3,5-二-第三丁基-4-羥基苯甲酸酯(BASF公司製造之「Tinuvin120」)等。 就更進一步抑制時間經過後之可見光透過率之降低之觀點而言，包含上述紫外線遮蔽劑之層(第1層、第2層或第3層)100重量%中，上述紫外線遮蔽劑之含量及苯并三唑化合物之含量較佳為0.1重量%以上，更佳為0.2重量%以上，進而較佳為0.3重量%以上，尤佳為0.5重量%以上，較佳為2.5重量%以下，更佳為2重量%以下，進而較佳為1重量%以下，尤佳為0.8重量%以下。尤其包含上述紫外線遮蔽劑之層100重量%中，藉由上述紫外線遮蔽劑之含量為0.2重量%以上，可顯著抑制中間膜及層合玻璃於時間經過後之可見光透過率之降低。 (抗氧化劑) 上述中間膜較佳為包含抗氧化劑。上述第1層較佳為包含抗氧化劑。上述第2層較佳為包含抗氧化劑。上述第3層較佳為包含抗氧化劑。上述抗氧化劑可使用僅一種，亦可並用兩種以上。 作為上述抗氧化劑，可列舉：酚系抗氧化劑、硫系抗氧化劑及磷系抗氧化劑等。上述酚系抗氧化劑係具有酚骨架之抗氧化劑。上述硫系抗氧化劑係含有硫原子之抗氧化劑。上述磷系抗氧化劑係含有磷原子之抗氧化劑。 上述抗氧化劑較佳為酚系抗氧化劑或磷系抗氧化劑。 作為上述酚系抗氧化劑，可列舉：2,6-二-第三丁基-對甲酚(BHT)、丁基化羥基苯甲醚(BHA)、2,6-二-第三丁基-4-乙基苯酚、β-(3,5-二-第三丁基-4-羥基苯基)丙酸硬脂酯、2,2'-亞甲基雙-(4-甲基-6-丁基苯酚)、2,2'-亞甲基雙-(4-乙基-6-第三丁基苯酚)、4,4'-亞丁基-雙-(3-甲基-6-第三丁基苯酚)、1,1,3-三-(2-甲基-羥基-5-第三丁基苯基)丁烷、四[亞甲基-3-(3',5'-丁基-4-羥基苯基)丙酸酯]甲烷、1,3,3-三-(2-甲基-4-羥基-5-第三丁基苯酚)丁烷、1,3,5-三甲基-2,4,6-三(3,5-二-第三丁基-4-羥基苄基)苯、雙(3,3'-第三丁基苯酚)丁酸二醇酯及雙(3-第三丁基-4-羥基-5-甲基苯丙酸)伸乙基雙(氧乙烯)等。可較佳地使用該等抗氧化劑內之一種或兩種以上。 作為上述磷系抗氧化劑，可列舉：亞磷酸十三烷基酯、亞磷酸三(十三烷基)酯、亞磷酸三苯酯、亞磷酸三壬基苯酯、雙(十三烷基)季戊四醇二亞磷酸酯、雙(癸基)季戊四醇二亞磷酸酯、亞磷酸三(2,4-二-第三丁基苯基)酯、亞磷酸雙(2,4-二-第三丁基-6-甲基苯基)乙酯、亞磷酸三(2,4-二-第三丁基苯基)酯、及2,2'-亞甲基雙(4,6-二-第三丁基-1-苯基氧基)(2-乙基己基氧基)磷等。可較佳地使用該等抗氧化劑內之一種或兩種以上。 作為上述抗氧化劑之市售品，例如可列舉：BASF公司製造之「IRGANOX 245」、BASF公司製造之「IRGAFOS 168」、BASF公司製造之「IRGAFOS 38」、住友化學工業公司製造之「Sumilizer BHT」、及BASF公司製造之「IRGANOX 1010」等。 為了持續長時間維持中間膜及層合玻璃之較高之可見光透過率，上述中間膜100重量%中或包含抗氧化劑之層(第1層、第2層或第3層)100重量%中，上述抗氧化劑之含量較佳為0.1重量%以上。又，由於抗氧化劑之添加效果飽和，故而上述中間膜100重量%中或包含上述抗氧化劑之層100重量%中，上述抗氧化劑之含量較佳為2重量%以下。 (其他成分) 上述第1層、上述第2層及上述第3層分別亦可視需要而含有阻燃劑、抗靜電劑、顏料、染料、耐濕劑、螢光增白劑及紅外線吸收劑等添加劑。該等添加劑可使用僅一種，亦可並用兩種以上。 (層合玻璃) 於圖3中，以剖視圖表示使用圖1所示之層合玻璃用中間膜之層合玻璃之一例。 圖3所示之層合玻璃21具備：中間膜11、第1層合玻璃構件22、及第2層合玻璃構件23。中間膜11係配置於第1層合玻璃構件22與第2層合玻璃構件23之間，並夾入。於中間膜11之第1表面，配置第1層合玻璃構件22。於中間膜11之與第1表面相反之第2表面，配置第2層合玻璃構件23。 作為上述層合玻璃構件，可列舉：玻璃板及PET(聚對苯二甲酸乙二酯)膜等。上述層合玻璃中，不僅包括於兩片玻璃板之間夾入有中間膜之層合玻璃，亦包括於玻璃板與PET膜等之間夾入有中間膜之層合玻璃。層合玻璃係具備玻璃板之積層體，較佳為使用至少1片玻璃板。較佳為，上述第1層合玻璃構件及上述第2層合玻璃構件分別為玻璃板或PET(聚對苯二甲酸乙二酯)膜，且上述中間膜包含至少1片玻璃板作為上述第1層合玻璃構件及上述第2層合玻璃構件。尤佳為上述第1層合玻璃構件及第2層合玻璃構件之兩者為玻璃板。 作為上述玻璃板，可列舉無機玻璃及有機玻璃。作為上述無機玻璃，可列舉：浮法平板玻璃、熱射線吸收板玻璃、熱射線反射板玻璃、研磨板玻璃、壓花板玻璃、烙網板玻璃及綠玻璃等。上述有機玻璃係代用為無機玻璃之合成樹脂玻璃。作為上述有機玻璃，可列舉：聚碳酸酯板及聚(甲基)丙烯酸系樹脂板等。作為上述聚(甲基)丙烯酸系樹脂板，可列舉聚(甲基)丙烯酸甲酯板等。 上述第1層合玻璃構件及上述第2層合玻璃構件之各厚度並無特別限定，較佳為1 mm以上，較佳為5 mm以下。於上述層合玻璃構件為玻璃板之情形時，該玻璃板之厚度較佳為1 mm以上，較佳為5 mm以下。於上述層合玻璃構件為PET膜之情形時，該PET膜之厚度較佳為0.03 mm以上，較佳為0.5 mm以下。 上述層合玻璃之製造方法並無特別限定。例如，於上述第1、第2層合玻璃構件之間夾持上述中間膜，使其通過擠壓輥，或裝入橡膠袋而進行減壓吸引。藉此，使殘留於第1層合玻璃構件與中間膜及第2層合玻璃構件與中間膜之間之空氣脫氣。其後，於約70～110℃下進行預接著而獲得積層體。繼而，使積層體進入高壓釜，或進行加壓，以約120～150℃及1～1.5 MPa之壓力進行壓接。可以如此之方式而獲得層合玻璃。 上述層合玻璃可用於汽車、軌道車輛、飛機、船舶及建築物等。上述層合玻璃較佳為建築用或車輛用之層合玻璃，更佳為車輛用之層合玻璃。上述層合玻璃亦可用於該等用途以外。上述層合玻璃可用於汽車之擋風玻璃、側門玻璃、後窗玻璃或頂窗玻璃等。由於隔熱性較高且可見光透過率較高，故而上述層合玻璃可較佳地用於汽車。 上述層合玻璃係作為抬頭顯示器(HUD)之層合玻璃。於上述層合玻璃中，可使控制單元發送之速度等計測資訊等自儀器、面板之顯示單元放映出至擋風玻璃。因此，汽車之駕駛者可不降低視野而同時視認前方之視野與計測資訊。 以下，列舉實施例對本發明更詳細地說明。本發明並不僅限於該等實施例。 於所使用之聚乙烯醇縮醛樹脂中，縮醛化係使用碳數4之正丁醛。關於聚乙烯醇縮醛樹脂，縮醛化度(丁醛化度)、乙醯化度及羥基之含有率係藉由依據JIS K6728「聚乙烯醇縮丁醛試驗方法」之方法而測定。再者，於藉由ASTM D1396-92進行測定之情形時，亦顯出與依據JIS K6728「聚乙烯醇縮丁醛試驗方法」之方法相同之數值。 用以形成中間膜之組合物(1)之製作： 相對於聚乙烯醇縮丁醛樹脂(聚乙烯醇之平均聚合度1700，羥基之含有率30.7莫耳%，縮醛化度68.5莫耳%，乙醯化度0.8莫耳%)100重量份，添加三乙二醇二-2-乙基己酸酯(3GO)40重量份、2-(2'-羥基-3'-第三丁基-5-甲基苯基)-5-氯苯并三唑(BASF公司製造之「Tinuvin326」)0.2重量份、及BHT(2,6-二-第三丁基對甲酚)0.2重量份，利用混合輥充分混練，獲得用以形成中間膜之組合物(1)。 用以形成中間膜之組合物(1A)之製作： 於上述組合物(1)中，添加作為著色劑之SG-1505(蒽醌化合物，SUMIKA COLOR公司製造之「BLUE SG-1505」)，準備著色劑之含量為0.025重量%之組合物(1A)。 用以形成中間膜之組合物(1B)之製作： 於上述組合物(1)中，添加作為著色劑之SG-1505(蒽醌化合物，SUMIKA COLOR公司製造之「BLUE SG-1505」)，準備著色劑之含量為0.0005重量%之組合物(1B)。 (實施例1) 於與HUD之顯示區域對應之位置，形成中間膜之顯示對應區域。 於顯示對應區域之周圍之區域，使用上述組合物(1)。於遮蔽區域，使用上述組合物(1)及上述組合物(1A)。上述組合物(1A)係配置於中間膜之厚度方向之一部分區域。於顯示對應區域，使用上述組合物(1)及上述組合物(1B)。上述組合物(1B)係配置於中間膜之厚度方向之一部分區域。 於模具內具有複數條樹脂流路，使用於模具出口使複數條樹脂流路合流之擠出機，以使上述組合物(1)及上述組合物(1A)/上述組合物(1)/上述組合物(1)及上述組合物(1B)/上述組合物(1)依序位於所獲得之中間膜之寬度方向上之方式將該等擠出，藉此獲得厚度方向之截面形狀為楔狀之中間膜。所獲得之中間膜係捲取為捲狀。 於所獲得之中間膜，於另一端具有最小厚度800 μm，於一端具有最大厚度1400 μm，具有0.6 mrad之楔角。 將於兩片透明玻璃(2 mm)之間積層有所獲得之中間膜之積層體放入至橡膠袋而進行減壓吸引，於100℃下進行預接著。將經預接著之積層體放入至高壓釜中，以150℃及1.5 MPa之壓力進行壓接，獲得層合玻璃。 於所獲得之中間膜之寬度方向上，使帶狀之遮蔽區域(可見光透過率為10%以下)、顯示對應區域之周圍區域(可見光透過率為80%以上)、與HUD之顯示區域對應之帶狀之顯示對應區域(顯示對應區域之可見光透過率低於周圍區域之可見光透過率)、及顯示對應區域之周圍區域(可見光透過率為80%以上)依序位於厚度較大之一端側之緣部。再者，使用分光光度計(日立高新技術公司製造之「U-4100」)，依據JIS R3211(1998)，測定所獲得之層合玻璃於波長380～780 nm下之可見光透過率。 於所獲得之中間膜中，顯示對應區域、與鄰接於顯示對應區域之周圍區域可藉由目視而識別，且顯示對應區域之色與鄰接於顯示對應區域之周圍區域之色不同。 (實施例2) 於與HUD之顯示區域對應之位置，形成中間膜之顯示對應區域。 於顯示對應區域之周圍之區域，使用上述組合物(1)。於遮蔽區域，使用上述組合物(1)及上述組合物(1A)。上述組合物(1A)係配置於中間膜之厚度方向之一部分區域。於顯示對應區域，使用上述組合物(1)。 於模具內具有複數條樹脂流路，使用於模具出口使複數條樹脂流路合流之擠出機，以使上述組合物(1)及上述組合物(1A)/上述組合物(1)依序位於所獲得之中間膜之寬度方向上之方式將該等擠出，藉此獲得厚度方向之截面形狀為楔狀之膜。於所獲得之中間膜之兩側之表面，於顯示對應區域實施壓紋加工，於顯示對應區域形成凹凸形狀，而獲得中間膜。所獲得之中間膜係捲取為捲狀。 於所獲得之中間膜，於另一端具有最小厚度800 μm，於一端具有最大厚度1200 μm，具有0.4 mrad之楔角。 於所獲得之中間膜之寬度方向上，使帶狀之遮蔽區域(可見光透過率為10%以下)、顯示對應區域之周圍區域(可見光透過率為80%以上)、與HUD之顯示區域對應之帶狀之顯示對應區域(可見光透過率為80%以上)、及顯示對應區域之周圍區域(可見光透過率為80%以上)依序位於厚度較大之一端側之緣部。 將於兩片透明玻璃(2 mm)之間積層有所獲得之中間膜之積層體放入至橡膠袋而進行減壓吸引，於100℃下進行預接著。將經預接著之積層體放入至高壓釜中，以150℃及1.5 MPa之壓力進行壓接，獲得層合玻璃。 於所獲得之中間膜中，顯示對應區域、與鄰接於顯示對應區域之周圍區域可藉由目視而識別，且顯示對應區域之光澤度與鄰接於顯示對應區域之周圍區域之光澤度不同。 (比較例1) 不實施壓紋加工，除此以外，以與實施例2相同之方式，獲得中間膜。所獲得之中間膜係捲取為捲狀。 於所獲得之中間膜之寬度方向上，使帶狀之遮蔽區域(可見光透過率為10%以下)、與其他區域(可見光透過率為80%以上)依序位於厚度較大之另一端側之緣部。於該中間膜中，雖然於其他區域之一部分區域包含較佳為顯示資訊之區域(顯示對應區域)，但上述其他區域整體係同樣地形成。 (評價) (1)層合玻璃 準備一對玻璃板。該玻璃板具有特定之大小。於夾入中間膜之前之玻璃板，決定位於HUD之顯示區域之部分，決定玻璃板之顯示對應區域。 於實施例1、2中，藉由使捲狀之中間膜展開，使中間膜之顯示對應區域對位一對玻璃板之顯示對應區域，並將玻璃板/中間膜/玻璃板進行熱層壓，而獲得10片層合玻璃。於實施例1、2中，玻璃板與中間膜之顯示對應區域彼此之對位較為容易。再者，與實施例2相比，實施例1之情況之對位亦較為容易。又，使用實施例1、2中所獲得之10片層合玻璃作為擋風玻璃之HUD，自設置於下部之顯示單元使顯示資訊反射於層合玻璃。其結果為，未觀察到雙重影像，計測資訊良好地顯示。 於比較例1中，藉由使捲狀之中間膜展開，將玻璃板/中間膜/玻璃板進行熱層壓，而獲得10片層合玻璃。於比較例1中，雖然於上述其他區域之一部分區域包含較佳為顯示資訊之區域(顯示對應區域)，但上述其他區域整體係同樣地形成。於比較例1中，於一對玻璃板之顯示對應區域，雖然可使中間膜之顯示對應區域某種程度對位，但使其充分地對位較為困難。使用比較例1中所獲得之10片層合玻璃作為擋風玻璃之HUD，自設置於下部之顯示單元使顯示資訊反射於層合玻璃。其結果為，有觀察到雙重影像之情況，而有計測資訊無法良好顯示之情況。Hereinafter, the details of the present invention will be described. The interlayer film for laminated glass of the present invention (hereinafter sometimes referred to simply as "intermediate film") is used as a laminated glass for a head-up display (HUD). The intermediate film of the present invention is an interlayer film for HUD. The interlayer film of the present invention has a one-layer structure or a structure of two or more layers. The intermediate film of the present invention may have a one-layer structure or may have a structure of two or more layers. The intermediate film of the present invention may have a two-layer structure or may have a structure of three or more layers. The intermediate film of the present invention may be a single layer intermediate film or a multilayer intermediate film. The intermediate film of the present invention contains a thermoplastic resin. The intermediate film of the present invention has one end and the other end having a thickness larger than the one end on the side opposite to the one end. In the intermediate film of the present invention, the other end is thicker than one end. The one end and the other end are attached to the opposite ends of the intermediate film. The intermediate film of the present invention has a display corresponding region corresponding to the display area of the HUD. The above-mentioned display corresponding area is an area in which information can be displayed well. In the intermediate film of the present invention, the display corresponding region and the peripheral region adjacent to the display corresponding region may be visually recognized, or the color or gloss of the display corresponding region and the surrounding region adjacent to the display corresponding region. The color or gloss is different. Since the intermediate film of the present invention has the above-described configuration, when the laminated glass is obtained, the display corresponding region of the intermediate film corresponding to the display region of the HUD can be easily recognized. Therefore, the display corresponding region of the laminated glass member of a specific size (the region corresponding to the display corresponding region of the obtained laminated glass) can be easily aligned with the display corresponding region of the intermediate film, and the regions can be prevented from being interposed. The position is offset. Therefore, the display corresponding region of the intermediate film can be further surely located in the display region of the HUD of the obtained laminated glass. As a result, it is difficult for the HUD to make the information visible and double-shadow and display the information well. In the intermediate film (wedge intermediate film or the like) having one end and the other end having a thickness larger than the one end on the side opposite to the one end, the display of the intermediate film is corresponding to the intermediate film having a fixed thickness. The alignment of the regions is important, and in contrast, in the invention of the present invention, the alignment can be performed more surely. Further, since the display corresponding region of the intermediate film can be easily recognized, when the laminated glass is produced, it is not necessary to perform a specific operation in advance by measurement or the like for the display corresponding region of the HUD. Therefore, the manufacturing efficiency of the laminated glass can be remarkably improved. Further, depending on the vehicle type, the installation location, and the like, the position of the glass plate corresponding to the display region is often different. In contrast, even when a plurality of laminated glasses are obtained, the display of the intermediate film can be easily recognized. Because of the area, the display corresponding area of the interlayer film can be efficiently located in the display corresponding area of the glass plate, and the manufacturing efficiency of the laminated glass is remarkably improved. In the intermediate film of the present invention, the display corresponding region and the peripheral region adjacent to the display corresponding region can also be visually recognized. In the intermediate film of the present invention, the color or gloss of the display corresponding region may be different from the color or gloss of the peripheral region adjacent to the display corresponding region. The color or gloss of the display corresponding region is different from the color or gloss of the peripheral region adjacent to the display corresponding region, and the surrounding region adjacent to the display corresponding region can also be visually recognized. Since the visibility of the display corresponding region is further excellent, the intermediate film can be easily produced without degrading the original function of the intermediate film. Therefore, it is preferable that the color of the display corresponding region is different from the color of the peripheral region adjacent to the display corresponding region. Since the visibility of the display corresponding region is further excellent, it is preferable that the glossiness of the display corresponding region is different from the gloss of the peripheral region adjacent to the display corresponding region. Whether the display corresponding region and the surrounding region adjacent to the display corresponding region can be visually recognized are determined as follows. The judgment is made by whether or not the main surface of the intermediate film is visually recognized from a position of 70 cm in the vertical direction with ordinary visual acuity (for example, visual acuity 1.0). In view of further improving the display, it is preferable that the thickness changes from the one end toward the other end in the display corresponding region. In view of further improving the display, it is preferable that the thickness of the display corresponding region increases from the one end toward the other end. The interlayer film of the present invention may also have a masking region. The shielding area may be separated from the display corresponding area. The above-described shielding area is designed to prevent, for example, glare of the driver during operation due to sunlight or outdoor lighting. The above-mentioned shielding area is also provided in order to provide heat insulation. Preferably, the shielding area is located at an edge of the intermediate film. The masking area is preferably in the form of a strip. 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 from the viewpoint of further improving the display and further broadening the field of view. Preferably, the visible light transmittance of the corresponding display region is higher than the visible light transmittance of the shielding region. The visible light transmittance of the corresponding display region may be lower than the visible light transmittance of the shielding region. The visible light transmittance of the display corresponding region is preferably 50% or more higher than the visible light transmittance of the shielding region, and more preferably 60% or higher. Preferably, the visible light transmittance of the corresponding area is lower than the visible light transmittance of the surrounding area. The visible light transmittance of the display corresponding region is preferably lower than the visible light transmittance of the peripheral region, and is preferably 1% or more, more preferably 5% or less, and further preferably 10% or less lower. Further, for example, when the visible light transmittance of the intermediate film in the corresponding region and the shielding region is changed, the visible light transmittance is measured at the center position of the display corresponding region and the center position of the shielding region. The visible light transmittance of the obtained laminated glass at a wavelength of 380 to 780 nm can be measured using a spectrophotometer ("U-4100" manufactured by Hitachi High-Technologies Corporation) in accordance with JIS R3211 (1998). Further, as the glass plate, a transparent glass having a thickness of 2 mm is preferably used. A coloring agent or a filler may be used in order to change the color and visible light transmittance in the shielding area and the display corresponding area. The colorant or the filler may be contained only in a partial region of the thickness direction of the intermediate film, or may be included in the entire region in the thickness direction of the intermediate film. Preferably, the display corresponding region has a length direction and a width direction. Since the interlayer film is excellent in versatility, it is preferable that the width direction of the display corresponding region is a direction in which the one end is connected to the other end. The display corresponding region is preferably in the form of a strip. Preferably, the intermediate film has an MD (Machine direction) direction and a TD (Transverse Direction) direction. The intermediate film can be obtained, for example, by melt extrusion molding. The MD direction is the traveling direction of the intermediate film at the time of manufacture of the interlayer film. The TD direction is a direction in which the intermediate film is formed in a direction orthogonal to the traveling direction of the intermediate film, and the direction is orthogonal to the thickness direction of the intermediate film. Preferably, the one end and the other end are located on both sides of the TD direction. From the viewpoint of making the display further better, the intermediate film is preferably a portion having a wedge-shaped cross-sectional shape in the thickness direction. Preferably, the cross-sectional shape in the thickness direction of the corresponding region is wedge-shaped. Since the glossiness and the like can be controlled, it is preferable to display the corresponding region, and at least one surface of the intermediate film on both sides has an uneven shape. More preferably, the corresponding region is displayed, and the intermediate film has a concave-convex shape on both sides. Preferably, the uneven shape of the display corresponding region is different from the uneven shape of the surrounding region. The method for forming the above-described uneven shape is not particularly limited, and examples thereof include a lip embossing method, an embossing roll method, a calender roll method, and a profile extrusion method. Since the embossing which is a large number of uneven shapes of the fixed uneven pattern can be quantitatively formed, the embossing roll method is preferable. Preferably, the intermediate film is embossed on the surface by an embossing roll method. Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. In the cross-sectional view and the front view, the interlayer film for laminated glass according to the first embodiment of the present invention is schematically shown in Fig. 1 (a) and (b). Fig. 1(a) is a cross-sectional view taken along line II of Fig. 1(b). Further, the size and size of the intermediate film in Fig. 1 and the following drawings are appropriately changed from actual size and shape for convenience of illustration. In Fig. 1(a), a cross section of the intermediate film 11 in the thickness direction is shown. Further, in Fig. 1(a) and the following drawings, the thickness of the intermediate film and the layers constituting the intermediate film, and the wedge angle θ are expressed in a manner different from the actual thickness and the wedge angle for convenience of illustration. . 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 placed and laminated. The third layer 3 is placed on the second surface side of the first layer 1 opposite to the first surface, and laminated. The first layer 1 is disposed between the second layer 2 and the third layer 3 and sandwiched therebetween. The interlayer film 11 is used to obtain a laminated glass. The intermediate film 11 is an interlayer film for laminating 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. One end 11a and the other end 11b are opposite ends on both sides. The cross-sectional shape of the second layer 2 and the third layer 3 in the thickness direction is a wedge shape. The cross-sectional shape of the first layer 1 in the thickness direction is a rectangle. The thickness of the second layer 2 and the third layer 3 is greater on the side of the other end 11b than on the side of the one end 11a. 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 thinner region and a thicker region. The intermediate film 11 has a display corresponding region R1 corresponding to the display region of the head-up display. The display corresponding region R1 and the surrounding region R2 adjacent to the display corresponding region R1 can be visually recognized, or the color or gloss of the corresponding region R1 is different from the color or gloss of the peripheral region R2 adjacent to the display corresponding region R1. . The intermediate film 11 has a shielding region R3 away from the display corresponding region R1. The shielding region R3 is located at the edge of the intermediate film 11. 2(a) and 2(b), the intermediate film for laminated glass according to the second embodiment of the present invention is schematically shown in a cross-sectional view and a front view. Fig. 2(a) is a cross-sectional view taken along line II of Fig. 2(b). In Fig. 2(a), a cross section of the intermediate film 11A in the thickness direction is shown. The intermediate film 11A shown in Fig. 2 is provided with a first layer 1A. The intermediate film 11A has a layer structure of only the first layer 1A and is a single layer intermediate film. The intermediate film 11A is the first layer 1A. The interlayer film 11A is used to obtain a laminated glass. The intermediate film 11A is an interlayer film for laminating glass. The intermediate film 11A has one end 11a and has the other end 11b on the side opposite to the one end 11a. One end 11a and the other end 11b are opposite ends on both sides. The thickness of the other end 11b of the intermediate film 11A is larger than the thickness of the one end 11a. Therefore, the intermediate film 11A and the first layer 1A have a region having a small thickness and a region having a thick thickness. The intermediate film 11A and the first layer 1A have portions 11Aa and 1Aa having a rectangular cross-sectional shape in the thickness direction and portions 11Ab and 1Ab having a wedge-shaped cross-sectional shape in the thickness direction. The intermediate film 11A has a display corresponding region R1 corresponding to the display region of the head-up display. The display corresponding region R1 and the surrounding region R2 adjacent to the display corresponding region R1 can be visually recognized, or the color or gloss of the corresponding region R1 is different from the color or gloss of the peripheral region R2 adjacent to the display corresponding region R1. . The intermediate film 11A has a shielding region R3 away from the display corresponding region R1. The shielding region R3 is located at the edge of the intermediate film 11A. The intermediate film is preferably a portion having a wedge-shaped cross-sectional shape in the thickness direction. The intermediate film preferably has a portion that gradually increases in thickness from one end toward the other end. The cross-sectional shape of the intermediate film in the thickness direction is preferably a wedge shape. Examples of the cross-sectional shape in the thickness direction of the intermediate film include a trapezoid, a triangle, a pentagon, and the like. In order to suppress the double image, the wedge angle θ of the intermediate film can be appropriately set according to the mounting angle of the laminated glass. The wedge angle θ of the intermediate film is preferably 0.01 mrad (0.0006 degrees) or more, more preferably 0.2 mrad (0.0115 degrees) or more, and preferably 2 mrad (0.1146 degrees) or less, from the viewpoint of further suppressing the double image. More preferably, it is 0.7 mrad (0.0401 degrees) or less. The wedge angle θ is a point at which the line connecting the maximum thickness portion and the first surface portion of the intermediate film of the minimum thickness portion and the line connecting the maximum thickness portion and the second surface portion of the intermediate film of the minimum thickness portion angle. The thickness of the above intermediate film is not particularly limited. The thickness of the above intermediate film means 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 and 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, and further Good for less than 1.5 mm. When the distance between one end and the other end is X, the intermediate film preferably has a minimum thickness from the one end toward the inner side at a distance of 0X to 0.2X, and the distance from the other end toward the inner side at a distance of 0X to 0.2X. The region has a maximum thickness, and the intermediate film preferably has a minimum thickness in a region from the one end toward the inner side at a distance of 0X to 0.1X, and a region having a maximum thickness from the other end toward the inner side at a distance of 0X to 0.1X. Preferably, the intermediate film has a minimum thickness at one end and the intermediate film has a maximum thickness at the other end. The intermediate film 11, 11A has a maximum thickness at the other end 11b and has a minimum thickness at 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, from the viewpoint of practical use and the viewpoint of sufficiently improving the adhesion and the penetration resistance. 1 mm or less, more preferably 0.8 mm or less. The thickness of the layer (intermediate layer) disposed between the two surface layers has a maximum thickness of 0.001 mm or more, more preferably 0.1 mm or more, from the viewpoint of practical use and the viewpoint of sufficiently improving the penetration resistance. It is preferably 0.2 mm or more, preferably 0.8 mm or less, more preferably 0.6 mm or less, and further preferably 0.3 mm or less. Hereinafter, the details of the materials constituting each layer of the multilayer intermediate film and the intermediate film of the single layer will be described. (Thermoplastic Resin) The thermoplastic resin contained in the interlayer film (each layer) of the present invention is not particularly limited. As the above thermoplastic resin, a previously known thermoplastic resin can be used. The above thermoplastic resins may be used alone or in combination of two or more. Examples of the thermoplastic resin include a polyvinyl acetal resin, an ethylene-vinyl acetate copolymer resin, an ethylene-acrylic copolymer resin, a polyurethane resin, and a polyvinyl alcohol resin. Thermoplastic resins other than these may also be used. The above thermoplastic resin is preferably a polyvinyl acetal resin. By using a polyvinyl acetal resin in combination with a plasticizer, the adhesion of the interlayer film of the present invention to the laminated glass member or other interlayer film can be further improved. The polyvinyl acetal resin can be produced, for example, by acetalizing polyvinyl alcohol (PVA) with an aldehyde. The polyvinyl acetal resin is preferably an acetal of polyvinyl alcohol. The polyvinyl alcohol can be produced, for example, by saponifying polyvinyl acetate. The degree of saponification of the above polyvinyl alcohol is usually in the range of 70 to 99.9 mol%. The average degree of polymerization of the polyvinyl alcohol is preferably 200 or more, more preferably 500 or more, still more preferably 1,500 or more, still more preferably 1600 or more, still more preferably 2,600 or more, and most preferably 2,700 or more, and more preferably 5,000 or less, more preferably 4,000 or less, further preferably 3,500 or less. When the average degree of polymerization is at least the above lower limit, the penetration resistance of the laminated glass is further improved. When the average degree of polymerization is not more than the above upper limit, the formation of the interlayer film is facilitated. The average degree of polymerization of the above polyvinyl alcohol can be determined by a method in accordance with JIS K6726 "Testing methods for polyvinyl alcohol". The carbon number of the acetal group contained in the polyvinyl acetal resin is not particularly limited. The aldehyde used in the production of the above polyvinyl acetal resin is not particularly limited. The acetal group in the polyvinyl acetal resin preferably has a carbon number of 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 interlayer film is sufficiently lowered. The aldehyde is not particularly limited. It is generally preferred to use an aldehyde having a carbon number of 1 to 10. Examples of the aldehyde having 1 to 10 carbon atoms include propionaldehyde, n-butyraldehyde, isobutyraldehyde, n-pentanal, 2-ethylbutyraldehyde, n-hexanal, n-octanal, n-nonanal, and anthracene. Aldehyde, formaldehyde, acetaldehyde and benzaldehyde. Preferred is propionaldehyde, n-butyraldehyde, isobutyraldehyde, n-hexanal or n-pentanal, more preferably propionaldehyde, n-butyraldehyde or isobutyraldehyde, and further preferably n-butyraldehyde. These aldehydes may be used alone or in combination of two or more. The content of the hydroxyl group (hydroxy group) of the polyvinyl acetal resin is preferably 15 mol% or more, more preferably 18 mol% or more, more preferably 40 mol% or less, still more preferably 35 mol%. the following. When the content of the hydroxyl group is at least the above lower limit, the adhesion of the interlayer film is further improved. In addition, when the content of the hydroxyl group is at most the above upper limit, the flexibility of the interlayer film is improved, and the operation of the interlayer film is facilitated. The content of the hydroxyl group of the polyvinyl acetal resin is a value expressed by a percentage of the molar fraction obtained by dividing the amount of the ethyl group bonded to the hydroxyl group by the total ethyl group of the main chain. The amount of the ethyl group having a hydroxyl group bonded thereto can be determined, for example, by measurement according to JIS K6728 "Polyvinyl butyral test method" or according to ASTM D1396-92. The degree of acetylation (the amount of acetamidine) of the polyvinyl acetal resin is preferably 0.1 mol% or more, more preferably 0.3 mol% or more, still more preferably 0.5 mol% or more, and more preferably 30. The molar percentage is 5% or less, more preferably 25 mol% or less, further preferably 20 mol% or less. When the degree of acetylation is at least the above lower limit, the compatibility between the polyvinyl acetal resin and the plasticizer is improved. When the degree of acetylation is less than or equal to the above upper limit, the moisture resistance of the interlayer film and the laminated glass is improved. The above-mentioned degree of acetylation is obtained by subtracting the amount of the ethyl group bonded to the acetal group and the amount of the ethyl group bonded to the hydroxy group by the total ethyl group of the autonomous chain divided by the total ethyl group of the main chain. The molar fraction obtained by the amount is expressed as a percentage. The amount of the ethyl group bonded to the acetal group may be measured, for example, according to JIS K6728 "Testing methods for polyvinyl butyral" or according to ASTM D1396-92. The degree of acetalization of the polyvinyl acetal resin (the degree of butyralization in the case of a polyvinyl butyral resin) is preferably 60 mol% or more, more preferably 63 mol% or more, more preferably It is 85 mol% or less, more preferably 75 mol% or less, further preferably 70 mol% or less. When the degree of acetalization is at least the above lower limit, the compatibility between the polyvinyl acetal resin and the plasticizer is improved. When the degree of acetalization is at most the above upper limit, the reaction time required for producing a polyvinyl acetal resin is shortened. The degree of acetalization is a value expressed by a percentage of the molar fraction obtained by dividing the amount of the ethyl group bonded to the acetal group by the total ethyl group of the main chain. The degree of acetalization can be calculated by a method according to JIS K6728 "Testing method for polyvinyl butyral" or a method according to ASTM D1396-92. Further, the content of the hydroxyl group (amount of hydroxyl group), the degree of acetalization (degree of butyralization), and the degree of acetylation are preferably determined by the method according to JIS K6728 "Testing method for polyvinyl butyral". Calculated based on the measured results. When the polyvinyl acetal resin is a polyvinyl butyral resin, the content of the hydroxyl group (amount of hydroxyl group), the degree of acetalization (degree of butyralization), and the degree of acetylation are preferably It is calculated based on the result measured by the method of JIS K6728 "Testing method of polyvinyl butyral". (Plasticizer) The intermediate film (each layer) of the present invention preferably contains a plasticizer from the viewpoint of further increasing the adhesion of the interlayer film. When the thermoplastic resin contained in the intermediate film is a polyvinyl acetal resin, the intermediate film (each layer) preferably contains a plasticizer. The layer comprising the polyvinyl acetal resin preferably contains a plasticizer. The plasticizer is not particularly limited. As the above plasticizer, a previously known plasticizer can be used. The plasticizer may be used alone or in combination of two or more. Examples of the plasticizer include an organic ester plasticizer such as a monobasic organic acid ester or a polybasic organic acid ester, and an organic phosphoric acid plasticizer such as an organic phosphoric acid plasticizer or an organic phosphorous acid plasticizer. An organic ester plasticizer is preferred. The above plasticizer is preferably a liquid plasticizer. The monobasic organic acid ester is not particularly limited, and examples thereof include a glycol ester obtained by a reaction of a diol with a monobasic organic acid, and an ester of triethylene glycol or tripropylene glycol and a monobasic organic acid. Wait. Examples of the diol include triethylene glycol, tetraethylene glycol, and tripropylene glycol. Examples of the monobasic organic acid include butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptanoic acid, n-octanoic acid, 2-ethylhexanoic acid, n-decanoic acid, and citric acid. The polybasic organic acid ester is not particularly limited, and examples thereof include an ester compound of a polybasic organic acid and an alcohol having a linear or branched structure having 4 to 8 carbon atoms. Examples of the polybasic organic acid include adipic acid, sebacic acid, and sebacic acid. The organic ester plasticizer is not particularly limited, and examples thereof include triethylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylhexanoate, and triethylene glycol dioctane. Acid ester, triethylene glycol di-n-octanoate, triethylene glycol di-n-valerate, tetraethylene glycol di-n-valerate, dibutyl sebacate, dioctyl sebacate, dibutyl Carbitol adipate, ethylene glycol di-2-ethylbutyrate, 1,3-propanediol di-2-ethylbutyrate, 1,4-butanediol di-2-ethylbutyl Acid ester, diethylene glycol di-2-ethyl butyrate, diethylene glycol di-2-ethylhexanoate, dipropylene glycol di-2-ethyl butyrate, triethylene glycol di-2 -ethylvalerate, tetraethylene glycol di-2-ethylbutyrate, diethylene glycol dioctanoate, dihexyl adipate, dioctyl adipate, hexylcyclohexane adipate Ester, a mixture of heptyl adipate and decyl adipate, diisononyl adipate, diisononyl adipate, heptyl adipate, dibutyl sebacate, oil modification Azelaic acid, a mixture of a phosphate and an adipate, and the like. Organic ester plasticizers other than these may also be used. The organic phosphoric acid plasticizer is not particularly limited, and examples thereof include tributoxyethyl phosphate, isodecylphenyl phosphate, and triisopropyl phosphate. The plasticizer is preferably a diester plasticizer represented by the following formula (1). [Chemical 1] In the above formula (1), R1 and R2 each represent an organic group having 5 to 10 carbon atoms, R3 represents an ethyl group, an extended isopropyl group or an extended propyl group, and 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 above plasticizer preferably comprises triethylene glycol di-2-ethylhexanoate (3GO) or triethylene glycol di-2-ethylbutyrate (3GH), more preferably triethylene glycol. Di-2-ethylhexanoate. The content of the above plasticizer is not particularly limited. The content of the plasticizer in the respective layers is preferably 25 parts by weight or more, more preferably 30 parts by weight or more, more preferably 100 parts by weight or less, still more preferably 60 parts by weight or less based on 100 parts by weight of the thermoplastic resin. Further, it is preferably 50 parts by weight or less. When the content of the plasticizer is at least the above lower limit, the penetration resistance of the laminated glass is further improved. When the content of the plasticizer is not more than the above upper limit, the transparency of the interlayer film is further improved. (Heat-insulating compound) The intermediate film preferably contains a heat-insulating compound. The first layer preferably contains a heat insulating compound. The second layer preferably contains a heat insulating compound. The third layer preferably contains a heat insulating compound. The heat insulating compound may be used alone or in combination of two or more. Component X: The intermediate film is preferably a component X containing at least one of a phthalocyanine compound, a naphtholphthalate compound, and an anthracyanine compound. The first layer preferably contains the above component X. The second layer preferably contains the above component X. The above third layer preferably contains the above component X. The above component X is a heat insulating compound. The above-mentioned component X may be used alone or in combination of two or more. The above component X is not particularly limited. As the component X, a previously known phthalocyanine compound, a naphtholphthalate compound, and a phthalocyanine compound can be used. Examples of the component X include phthalocyanine, a derivative of phthalocyanine, a naphtholphthalein, a derivative of naphtholphthalein, a derivative of phthalocyanine and phthalocyanine, and the like. The phthalocyanine compound and the phthalocyanine derivative preferably each have a phthalocyanine skeleton. The naphtholphthale compound and the above naphtholphthalein derivative each preferably have a naphtholphthale skeleton. The phthalocyanine compound and the phthalocyanine derivative preferably each have a phthalocyanine skeleton. In view of further improving the heat insulating properties of the interlayer film and the laminated glass, the component X is preferably a group selected from the group consisting of phthalocyanine, a derivative of phthalocyanine, a derivative of naphtholphthalephthalate and naphtholphthalephthalate. At least one of them is more preferably at least one of a derivative of phthalocyanine and phthalocyanine. The component X preferably contains a vanadium atom or a copper atom from the viewpoint of effectively improving the heat insulating property and maintaining the visible light transmittance at a higher level for a long period of time. The above component X preferably contains a vanadium atom, and preferably contains a copper atom. The component X is more preferably at least one of a phthalocyanine containing a vanadium atom or a copper atom and a derivative of a phthalocyanine containing a vanadium atom or a copper atom. In view of further improving the heat insulating properties of the interlayer film and the laminated glass, the component X is preferably a structural unit having an oxygen atom bonded to a vanadium atom. In 100% by weight of the layer (the first layer, the second layer or the third layer) containing the component X, 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. The weight% or more is more preferably 0.02% by weight or more, more preferably 0.2% by weight or less, still more preferably 0.1% by weight or less, still more preferably 0.05% by weight or less, and still more preferably 0.04% by weight or less. When the content of the component X is not less than the above lower limit and not more than the above upper limit, the heat insulating property is sufficiently improved, and the visible light transmittance is sufficiently improved. For example, the visible light transmittance can be set to 70% or more. Heat-insulating particles: The intermediate film preferably contains heat-insulating particles. The first layer preferably contains the above-mentioned heat insulating particles. The second layer preferably contains the above heat insulating particles. The third layer preferably contains the above-mentioned heat insulating particles. The heat insulating particles are heat insulating compounds. By using the heat insulating particles, infrared rays (heat rays) can be effectively blocked. The heat insulating particles may be used alone or in combination of two or more. The heat insulating particles are more preferably metal oxide particles from the viewpoint of further improving the heat insulating properties of the laminated glass. The heat insulating particles are preferably particles (metal oxide particles) formed of an oxide of a metal. Infrared rays having a wavelength longer than 780 nm than visible light have a smaller amount of energy than ultraviolet rays. However, the infrared heat has a large effect, and if the infrared rays are absorbed by the substance, they are released in the form of heat. Therefore, infrared rays are often referred to as heat rays. By using the above-mentioned heat insulating particles, infrared rays (heat rays) can be effectively blocked. In addition, the term "insulation particle" means a particle which can absorb infrared rays. Specific examples of the heat insulating particles include tin oxide doped with aluminum, tin oxide doped with indium, tin oxide doped with antimony (ATO particles), and zinc oxide doped with gallium. Particles (GZO particles), zinc oxide particles (IZO particles) doped with indium, zinc oxide particles (AZO particles) doped with aluminum, titanium oxide particles doped with antimony, tungsten oxide particles doped with sodium, Tungsten-doped tungsten oxide particles, antimony-doped tungsten oxide particles, antimony-doped tungsten oxide particles, tin-doped indium oxide particles (ITO particles), tin-doped zinc oxide particles, doped Metal oxide particles such as zinc oxide particles doped with antimony or lanthanum hexaboride (LaB) 6 ) Particles, etc. Insulation particles other than these may also be used. Since the heat ray shielding function is high, metal oxide particles are preferable, and ATO particles, GZO particles, IZO particles, ITO particles or tungsten oxide particles are more preferable, and ITO particles or tungsten oxide particles are particularly preferable. In particular, since the heat ray shielding function is high and the acquisition is easy, tin oxide-doped indium oxide particles (ITO particles) are preferable, and tungsten oxide particles are also preferable. From the viewpoint of further improving the heat insulating properties of the interlayer film and the laminated glass, the tungsten oxide particles are preferably metal-doped tungsten oxide particles. The "tungsten oxide particles" described above include metal-doped tungsten oxide particles. Specific examples of the metal-doped tungsten oxide particles include sodium-doped tungsten oxide particles, antimony-doped tungsten oxide particles, antimony-doped tungsten oxide particles, and doped antimony. Tungsten oxide particles and the like. From the viewpoint of further improving the heat insulating properties of the interlayer film and the laminated glass, it is particularly preferable to dope the tungsten oxide particles doped with antimony. In view of further improving the heat insulating properties of the interlayer film and the laminated glass, the doped tungsten oxide particles are preferably of the formula: Cs 0.33 WO 3 The tungsten oxide particles are represented. The average particle diameter of the heat insulating particles is preferably 0.01 μm or more, more preferably 0.02 μm or more, more preferably 0.1 μm or less, still more preferably 0.05 μm or less. When the average particle diameter is at least the above lower limit, the shielding property of the heat ray is sufficiently improved. When the average particle diameter is at most the above upper limit, the dispersibility of the heat insulating particles is improved. The above "average particle diameter" means a volume average particle diameter. The average particle diameter can be measured using a particle size distribution measuring apparatus ("UPA-EX150" manufactured by Nikkiso Co., Ltd.) or the like. In 100% by weight of the layer (the first layer, the second layer or the third layer) containing the heat-insulating particles, the content of the heat-insulating particles (particularly the content of the tungsten oxide particles) is preferably 0.01% by weight or more, more preferably It is 0.1% by weight or more, more preferably 1% by weight or more, particularly preferably 1.5% by weight or more, preferably 6% by weight or less, more preferably 5.5% by weight or less, still more preferably 4% by weight or less, and particularly preferably It is 3.5% by weight or less, preferably 3% by weight or less. When the content of the heat insulating particles is not less than the above lower limit and not more than the above upper limit, the heat insulating property is sufficiently improved, and the visible light transmittance is sufficiently improved. (Metal Salt) The intermediate film preferably contains at least one metal salt (hereinafter sometimes referred to as a metal salt M) of an alkali metal salt or an alkaline earth metal salt. The above first layer preferably contains the above metal salt M. The above second layer preferably contains the above metal salt M. The above third layer preferably contains the above metal salt M. By using the above-described metal salt M, it is easy to control the adhesion between the interlayer film and the glass sheet or the adhesion between the layers in the interlayer film. The metal salt M may be used alone or in combination of two or more. The metal salt M preferably contains at least one metal selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, and Ba. The metal salt contained in the intermediate film is preferably a metal containing at least one of K and Mg. Further, the metal salt M is preferably an alkali metal salt of an organic acid having 2 to 16 carbon atoms or an alkaline earth metal salt of an organic acid having 2 to 16 carbon atoms, more preferably a magnesium carboxylate having 2 to 16 carbon atoms or A potassium carboxylate having a carbon number of 2 to 16. The magnesium carboxylate having 2 to 16 carbon atoms and the potassium carboxylate having 2 to 16 carbon atoms are not particularly limited, and examples thereof include magnesium acetate, potassium acetate, magnesium propionate, potassium propionate, and 2- Magnesium ethyl butyrate, potassium 2-ethylbutyrate, magnesium 2-ethylhexanoate, potassium 2-ethylhexanoate and the like. The total content of Mg and K in the layer (the first layer, the second layer or the third layer) containing the metal salt M is preferably 5 ppm or more, more preferably 10 ppm or more, still more preferably 20 ppm or more. It is preferably 300 ppm or less, more preferably 250 ppm or less, and still more preferably 200 ppm or less. When the total content of Mg and K is not less than the above lower limit and not more than the above upper limit, the adhesion between the interlayer film and the glass sheet or the adhesion between the layers in the interlayer film can be further favorably controlled. (Ultraviolet Screening Agent) The above 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. By using an ultraviolet shielding agent, it is difficult to further reduce the visible light transmittance even when the intermediate film and the laminated glass are used for a long period of time. The ultraviolet shielding agent may be used alone or in combination of two or more. The ultraviolet shielding agent contains an ultraviolet absorber. The above ultraviolet shielding agent is preferably an ultraviolet absorber. Examples of the ultraviolet shielding agent include a metal ultraviolet shielding agent, a metal oxide ultraviolet shielding agent, a benzotriazole ultraviolet shielding agent (benzotriazole compound), and a benzophenone ultraviolet shielding agent (two). Benzophenone compound), three UV shielding agent (three A compound), a malonate-based ultraviolet shielding agent (malonate compound), a oxalic acid-based ultraviolet shielding agent (oxalin aniline compound), and a benzoate-based ultraviolet shielding agent (benzoate compound). Examples of the metal-based ultraviolet absorber include platinum particles, particles coated with ruthenium oxide on the surface of the platinum particles, particles coated with ruthenium oxide on the surface of the palladium particles, and the like. The ultraviolet shielding agent is preferably not an insulating particle. The ultraviolet shielding agent is preferably a benzotriazole ultraviolet shielding agent, a benzophenone ultraviolet shielding agent, or the like. The ultraviolet shielding agent or the benzoate ultraviolet shielding agent is more preferably a benzotriazole ultraviolet shielding agent or a benzophenone ultraviolet shielding agent, and further preferably a benzotriazole ultraviolet absorbent. Examples of the metal oxide-based ultraviolet absorber include zinc oxide, titanium oxide, and cerium oxide. Further, the metal oxide-based ultraviolet absorber may be coated on the surface. Examples of the coating material for the surface of the metal oxide-based ultraviolet absorber include an insulating metal oxide, a hydrolyzable organic ruthenium compound, and a polyfluorene oxide compound. Examples of the insulating metal oxide include cerium oxide, aluminum oxide, and zirconium oxide. The above insulating metal oxide has, for example, a band gap energy of 5.0 eV or more. Examples of the benzotriazole-based ultraviolet absorber include 2-(2'-hydroxy-5'-methylphenyl)benzotriazole ("Tinuvin P" manufactured by BASF Corporation) and 2-(2'. -Hydroxy-3',5'-di-t-butylphenyl)benzotriazole ("Tinuvin320" manufactured by BASF Corporation), 2-(2'-hydroxy-3'-tert-butyl-5- Methylphenyl)-5-chlorobenzotriazole ("Tinuvin326" manufactured by BASF Corporation), and 2-(2'-hydroxy-3',5'-di-pentylphenyl)benzotriazole ( A benzotriazole-based ultraviolet absorber such as "Tinuvin 328" manufactured by BASF Corporation. The ultraviolet shielding agent is preferably a benzotriazole-based ultraviolet absorber containing a halogen atom, and more preferably a benzotriazole-based ultraviolet absorber containing a chlorine atom. Examples of the benzophenone-based ultraviolet absorber include octyl benzophenone ("Chimassorb 81" manufactured by BASF Corporation). As the above three The ultraviolet absorber is exemplified by "LA-F70" manufactured by ADEKA Corporation and 2-(4,6-diphenyl-1,3,5-three -2-yl)-5-[(hexyl)oxy]-phenol ("Tinuvin 1577FF" manufactured by BASF Corporation). Examples of the malonic ester-based ultraviolet shielding agent include dimethyl 2-(p-methoxybenzylidene)malonate and 2,2-(1,4-benzenedimethylene)bispropane. Tetraethyl dicarboxylate, 2-(p-methoxybenzylidene)-bis(1,2,2,6,6-pentamethyl 4-piperidyl)malonate, and the like. Commercial products of the above-mentioned malonic ester-based ultraviolet shielding agent include Hostavin B-CAP, Hostavin PR-25, and Hostavin PR-31 (both manufactured by Clariant Co., Ltd.). Examples of the herbicidal aniline-based ultraviolet shielding agent include N-(2-ethylphenyl)-N'-(2-ethoxy-5-t-butylphenyl) oxalic acid diamine, N- (2-Ethylphenyl)-N'-(2-ethoxy-phenyl)oxalyl diamine, 2-ethyl-2'-ethoxy-oxyaniline ("Sanduvor VSU" manufactured by Clariant And oxalic acid diamines having an aryl group or the like substituted on a nitrogen atom. Examples of the benzoate-based ultraviolet absorber include 2,4-di-tert-butylphenyl-3,5-di-t-butyl-4-hydroxybenzoate (manufactured by BASF Corporation). "Tinuvin120") and so on. Further, in order to further suppress a decrease in visible light transmittance after the passage of time, the content of the ultraviolet shielding agent is 100% by weight of the layer (the first layer, the second layer or the third layer) including the ultraviolet shielding agent. The content of the benzotriazole compound is preferably 0.1% by weight or more, more preferably 0.2% by weight or more, still more preferably 0.3% by weight or more, particularly preferably 0.5% by weight or more, preferably 2.5% by weight or less, more preferably It is 2% by weight or less, more preferably 1% by weight or less, and particularly preferably 0.8% by weight or less. In particular, when the content of the ultraviolet shielding agent is 0.2% by weight or more in 100% by weight of the layer of the ultraviolet shielding agent, the decrease in the visible light transmittance of the interlayer film and the laminated glass after the passage of time can be remarkably suppressed. (Antioxidant) The above intermediate film preferably contains an antioxidant. The first layer described above preferably contains an antioxidant. The above second layer preferably contains an antioxidant. The above third layer preferably contains an antioxidant. These antioxidants may be used alone or in combination of two or more. Examples of the antioxidant include a phenolic antioxidant, a sulfur-based antioxidant, and a phosphorus-based antioxidant. The phenolic antioxidant is an antioxidant having a phenol skeleton. The above sulfur-based antioxidant is an antioxidant containing a sulfur atom. The phosphorus-based antioxidant is an antioxidant containing a phosphorus atom. The above antioxidant is preferably a phenolic antioxidant or a phosphorus antioxidant. Examples of the phenolic antioxidant include 2,6-di-t-butyl-p-cresol (BHT), butylated hydroxyanisole (BHA), and 2,6-di-t-butyl- 4-ethylphenol, β-(3,5-di-t-butyl-4-hydroxyphenyl)propionic acid stearyl ester, 2,2'-methylenebis-(4-methyl-6- Butylphenol), 2,2'-methylenebis-(4-ethyl-6-tert-butylphenol), 4,4'-butylene-bis-(3-methyl-6-third 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-hydroxy-5-t-butylphenol)butane, 1,3,5-trimethyl Base-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene, bis(3,3'-tert-butylphenol) butyrate and bis ( 3-t-butyl-4-hydroxy-5-methylphenylpropionic acid) ethyl bis(oxyethylene) or the like. One or two or more of these antioxidants can be preferably used. Examples of the phosphorus-based antioxidant include tridecyl phosphite, tris(tridecyl)phosphite, triphenyl phosphite, tridecyl phenyl phosphite, and bis(tridecyl). Pentaerythritol diphosphite, bis(indenyl)pentaerythritol diphosphite, tris(2,4-di-t-butylphenyl) phosphite, bis(2,4-di-t-butyl) phosphite -6-methylphenyl)ethyl ester, tris(2,4-di-t-butylphenyl) phosphite, and 2,2'-methylenebis(4,6-di-third Alkyl-1-phenyloxy)(2-ethylhexyloxy)phosphine. One or two or more of these antioxidants can be preferably used. For example, "IRGANOX 245" manufactured by BASF Corporation, "IRGAFOS 168" manufactured by BASF Corporation, "IRGAFOS 38" manufactured by BASF Corporation, and "Sumilizer BHT" manufactured by Sumitomo Chemical Industries Co., Ltd. are mentioned as the commercial products of the above-mentioned antioxidants. And "IRGANOX 1010" manufactured by BASF Corporation. In order to maintain a high visible light transmittance of the interlayer film and the laminated glass for a long period of time, 100% by weight of the intermediate film or 100% by weight of the layer containing the antioxidant (the first layer, the second layer or the third layer) The content of the above antioxidant is preferably 0.1% by weight or more. Further, since the effect of adding the antioxidant is saturated, 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. (Other components) The first layer, the second layer, and the third layer may contain a flame retardant, an antistatic agent, a pigment, a dye, a moisture resistant agent, a fluorescent whitening agent, an infrared absorbing agent, etc., as needed. additive. These additives may be used alone or in combination of two or more. (Laminated Glass) An example of a laminated glass using the interlayer film for laminated glass shown in Fig. 1 is shown in a cross-sectional view in Fig. 3 . The laminated glass 21 shown in FIG. 3 includes the intermediate film 11, the first laminated glass member 22, and the 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 sandwiched therebetween. The first laminated glass member 22 is disposed on the first surface of the intermediate film 11. The second laminated glass member 23 is disposed on the second surface of the intermediate film 11 opposite to the first surface. Examples of the laminated glass member include a glass plate and a PET (polyethylene terephthalate) film. The laminated glass includes not only a laminated glass in which an intermediate film is sandwiched between two glass plates, but also a laminated glass in which an intermediate film is sandwiched between a glass plate and a PET film. The laminated glass system is provided with a laminate of glass plates, and it is preferred to use at least one glass plate. Preferably, each of the first laminated glass member and the second laminated glass member is a glass plate or a PET (polyethylene terephthalate) film, and the intermediate film includes at least one glass plate as the above-mentioned A laminated glass member and the above second laminated glass member. More preferably, both of the first laminated glass member and the second laminated glass member are glass plates. Examples of the glass plate include inorganic glass and organic glass. Examples of the inorganic glass include float plate glass, heat ray absorbing plate glass, heat ray reflecting plate glass, polishing plate glass, embossed plate glass, stencil glass, and green glass. The above organic glass is substituted with a synthetic resin glass of inorganic glass. Examples of the organic glass include a polycarbonate plate and a poly(meth)acrylic resin plate. As the poly(meth)acrylic resin sheet, a poly(methyl) acrylate plate or the like can be given. The thickness of each of the first laminated glass member and the second laminated glass member is not particularly limited, but is preferably 1 mm or more, and preferably 5 mm or less. In the case where the laminated glass member is a glass plate, the thickness of the glass plate is preferably 1 mm or more, preferably 5 mm or less. In the case where the laminated glass member is a PET film, the thickness of the PET film is preferably 0.03 mm or more, preferably 0.5 mm or less. The method for producing the laminated glass described above is not particularly limited. For example, the intermediate film is sandwiched between the first and second laminated glass members, and is passed through a squeeze roll or placed in a rubber bag to perform vacuum suction. Thereby, the air remaining between the first laminated glass member and the intermediate film and the second laminated glass member and the intermediate film is degassed. Thereafter, pre-gluing is carried out at about 70 to 110 ° C to obtain a laminate. Then, the laminated body is introduced into the autoclave or pressurized, and pressure-bonded at a pressure of about 120 to 150 ° C and a pressure of 1 to 1.5 MPa. Laminated glass can be obtained in this manner. The laminated glass described above can be used in automobiles, rail vehicles, airplanes, ships, buildings, and the like. The laminated glass is preferably a laminated glass for construction or a vehicle, and more preferably a laminated glass for a vehicle. The laminated glass described above can also be used in addition to such applications. The laminated glass described above can be used for a windshield, a side door glass, a rear window glass or a top window glass of an automobile. Since the heat insulating property is high and the visible light transmittance is high, the above laminated glass can be preferably used for automobiles. The laminated glass described above is used as a laminated glass for a head-up display (HUD). In the laminated glass, the measurement information such as the speed transmitted by the control unit can be projected from the display unit of the instrument or the panel to the windshield. Therefore, the driver of the car can visually recognize the front field of view and measurement information without lowering the field of view. Hereinafter, the present invention will be described in more detail by way of examples. The invention is not limited to the embodiments. Among the polyvinyl acetal resins used, acetalization uses a carbon number of n-butyraldehyde. With respect to the polyvinyl acetal resin, the degree of acetalization (degree of butyralization), the degree of acetylation, and the content of the hydroxyl group are measured by the method according to JIS K6728 "Testing method for polyvinyl butyral". Further, in the case of measurement by ASTM D1396-92, the same values as those in accordance with JIS K6728 "Testing methods for polyvinyl butyral" are also exhibited. Preparation of composition (1) for forming an intermediate film: relative to polyvinyl butyral resin (average degree of polymerization of polyvinyl alcohol of 1700, hydroxyl group content of 30.7 mol%, degree of acetalization of 68.5 mol% , acetylation degree: 0.8 mol%) 100 parts by weight, adding triethylene glycol di-2-ethylhexanoate (3GO) 40 parts by weight, 2-(2'-hydroxy-3'-t-butyl group -5-methylphenyl)-5-chlorobenzotriazole ("Tinuvin 326" manufactured by BASF Corporation) 0.2 parts by weight, and BHT (2,6-di-t-butyl-p-cresol) 0.2 parts by weight, The composition (1) for forming an intermediate film was obtained by thorough kneading using a mixing roll. Manufacture of the composition (1A) for forming an intermediate film: SG-1505 (a bismuth compound, "BLUE SG-1505" manufactured by SUMIKA COLOR Co., Ltd.) as a coloring agent is added to the composition (1), and prepared The content of the colorant was 0.025% by weight of the composition (1A). Preparation of the composition (1B) for forming an intermediate film: SG-1505 (a bismuth compound, "BLUE SG-1505" manufactured by SUMIKA COLOR Co., Ltd.) as a coloring agent is added to the above composition (1), and prepared The content of the colorant was 0.0005 wt% of the composition (1B). (Example 1) A display corresponding region of the intermediate film was formed at a position corresponding to the display region of the HUD. The above composition (1) was used in the area around the corresponding area. The above composition (1) and the above composition (1A) were used in the masking region. The above composition (1A) is disposed in a partial region of the intermediate film in the thickness direction. The above composition (1) and the above composition (1B) were used to display the corresponding regions. The above composition (1B) is disposed in a partial region of the intermediate film in the thickness direction. a plurality of resin flow paths in the mold, and an extruder for combining a plurality of resin flow paths at the die outlet to make the composition (1) and the composition (1A) / the composition (1) / The composition (1) and the above composition (1B) / the above composition (1) are sequentially extruded in such a manner as to be in the width direction of the obtained intermediate film, whereby the cross-sectional shape in the thickness direction is obtained as a wedge shape. The intermediate film. The obtained intermediate film was taken up in a roll shape. The obtained intermediate film had a minimum thickness of 800 μm at the other end and a maximum thickness of 1400 μm at one end with a wedge angle of 0.6 mrad. The laminated body obtained by laminating the obtained intermediate film between two sheets of transparent glass (2 mm) was placed in a rubber bag, and subjected to reduced pressure suction, and preliminarily carried out at 100 °C. The preliminarily laminated body was placed in an autoclave, and pressure-bonded at 150 ° C and a pressure of 1.5 MPa to obtain a laminated glass. In the width direction of the obtained intermediate film, a band-shaped shielding region (visible light transmittance of 10% or less) and a peripheral region (visible light transmittance of 80% or more) of the corresponding region are displayed, which corresponds to the display region of the HUD. The display area corresponding to the strip shape (the visible light transmittance of the corresponding area is lower than the visible light transmittance of the surrounding area), and the surrounding area of the corresponding area (the visible light transmittance is 80% or more) is sequentially located on one end side of the larger thickness. Edge. Further, the visible light transmittance of the obtained laminated glass at a wavelength of 380 to 780 nm was measured using a spectrophotometer ("U-4100" manufactured by Hitachi High-Technologies Corporation) in accordance with JIS R3211 (1998). In the obtained intermediate film, the display corresponding region and the peripheral region adjacent to the display corresponding region can be visually recognized, and the color of the display corresponding region is different from the color of the peripheral region adjacent to the display corresponding region. (Example 2) A display corresponding region of the intermediate film was formed at a position corresponding to the display region of the HUD. The above composition (1) was used in the area around the corresponding area. The above composition (1) and the above composition (1A) were used in the masking region. The above composition (1A) is disposed in a partial region of the intermediate film in the thickness direction. The above composition (1) was used to display the corresponding region. A plurality of resin flow paths are provided in the mold, and the extruder is used to join a plurality of resin flow paths to the extruder so that the composition (1) and the composition (1A)/the composition (1) are sequentially The film was extruded in such a manner as to be in the width direction of the obtained interlayer film, whereby a film having a wedge-shaped cross-sectional shape in the thickness direction was obtained. On the surfaces on both sides of the obtained intermediate film, embossing is performed on the display corresponding region, and a concave-convex shape is formed on the display corresponding region to obtain an intermediate film. The obtained intermediate film was taken up in a roll shape. The obtained intermediate film had a minimum thickness of 800 μm at the other end and a maximum thickness of 1200 μm at one end with a wedge angle of 0.4 mrad. In the width direction of the obtained intermediate film, a band-shaped shielding region (visible light transmittance of 10% or less) and a peripheral region (visible light transmittance of 80% or more) of the corresponding region are displayed, which corresponds to the display region of the HUD. The strip-shaped display corresponding region (visible light transmittance is 80% or more) and the peripheral region (visible light transmittance of 80% or more) indicating the corresponding region are sequentially located at the edge portion on the one end side of the larger thickness. The laminated body obtained by laminating the obtained intermediate film between two sheets of transparent glass (2 mm) was placed in a rubber bag, and subjected to reduced pressure suction, and preliminarily carried out at 100 °C. The preliminarily laminated body was placed in an autoclave, and pressure-bonded at 150 ° C and a pressure of 1.5 MPa to obtain a laminated glass. In the obtained intermediate film, the display corresponding region and the peripheral region adjacent to the display corresponding region can be visually recognized, and the gloss of the corresponding region is different from the gloss of the peripheral region adjacent to the display corresponding region. (Comparative Example 1) An intermediate film was obtained in the same manner as in Example 2 except that embossing was not carried out. The obtained intermediate film was taken up in a roll shape. In the width direction of the obtained intermediate film, a strip-shaped shielding region (visible light transmittance of 10% or less) and other regions (visible light transmittance of 80% or more) are sequentially placed on the other end side of the thicker thickness. Edge. In the intermediate film, although a portion of the other region includes a region (display corresponding region) in which information is preferably displayed, the other regions are formed in the same manner as a whole. (Evaluation) (1) Laminated glass A pair of glass plates were prepared. The glass sheet has a specific size. The glass plate before being sandwiched between the intermediate film is determined to be located in the display area of the HUD, and the display corresponding area of the glass plate is determined. In the first and second embodiments, the roll-shaped intermediate film is unfolded, and the display corresponding region of the intermediate film is aligned with the display corresponding region of the pair of glass plates, and the glass plate/intermediate film/glass plate is thermally laminated. And 10 sheets of laminated glass were obtained. In the first and second embodiments, it is easy to align the corresponding regions of the glass plate and the intermediate film. Further, compared with the second embodiment, the alignment of the case of the first embodiment is also relatively easy. Further, the ten sheets of laminated glass obtained in Examples 1 and 2 were used as the HUD of the windshield, and the display unit provided in the lower portion reflected the display information on the laminated glass. As a result, no double image was observed, and the measurement information was displayed satisfactorily. In Comparative Example 1, a glass plate/intermediate film/glass plate was thermally laminated by developing a roll-shaped interlayer film to obtain 10 sheets of laminated glass. In Comparative Example 1, although one of the other regions includes a region (display corresponding region) in which information is preferably displayed, the other regions are formed in the same manner. In Comparative Example 1, in the display corresponding region of a pair of glass plates, the display region of the intermediate film can be aligned to some extent, but it is difficult to sufficiently align the regions. Ten sheets of laminated glass obtained in Comparative Example 1 were used as the HUD of the windshield, and the display unit provided in the lower portion reflected the display information on the laminated glass. As a result, there is a case where a double image is observed, and there is a case where measurement information cannot be displayed well.

1‧‧‧第1層
1A‧‧‧第1層
1Aa‧‧‧厚度方向之截面形狀為矩形之部分
1Ab‧‧‧厚度方向之截面形狀為楔狀之部分
2‧‧‧第2層
3‧‧‧第3層
11‧‧‧中間膜
11A‧‧‧中間膜
11a‧‧‧一端
11b‧‧‧另一端
11Aa‧‧‧厚度方向之截面形狀為矩形之部分
11Ab‧‧‧厚度方向之截面形狀為楔狀之部分
21‧‧‧層合玻璃
22‧‧‧第1層合玻璃構件
23‧‧‧第2層合玻璃構件
R1‧‧‧顯示對應區域
R2‧‧‧周圍區域
R3‧‧‧遮蔽區域1‧‧‧1st floor
1A‧‧‧1st floor
1Aa‧‧‧The cross-sectional shape in the thickness direction is a part of a rectangle
1Ab‧‧‧The cross-sectional shape in the thickness direction is a wedge-shaped part
2‧‧‧2nd floor
3‧‧‧3rd floor
11‧‧‧Intermediate film
11A‧‧‧ interlayer film
11a‧‧‧End
11b‧‧‧The other end
11Aa‧‧‧The cross-sectional shape in the thickness direction is a part of a rectangle
11Ab‧‧‧The cross-sectional shape in the thickness direction is a wedge-shaped part
21‧‧‧Laminated glass
22‧‧‧1st laminated glass component
23‧‧‧2nd laminated glass component
R1‧‧‧ display corresponding area
R2‧‧‧ surrounding area
R3‧‧‧ shaded area

圖1(a)及(b)係模式性地表示本發明之第1實施形態之層合玻璃用中間膜之剖視圖及前視圖。 圖2(a)及(b)係模式性地表示本發明之第2實施形態之層合玻璃用中間膜之剖視圖及前視圖。 圖3係表示使用圖1所示之層合玻璃用中間膜之層合玻璃之一例之剖視圖。1(a) and 1(b) are a cross-sectional view and a front view schematically showing an interlayer film for laminated glass according to a first embodiment of the present invention. 2(a) and 2(b) are a cross-sectional view and a front view schematically showing an interlayer film for laminated glass according to a second embodiment of the present invention. Fig. 3 is a cross-sectional view showing an example of a laminated glass using the interlayer film for laminated glass shown in Fig. 1.

無no

Claims (11)

一種層合玻璃用中間膜，其係用於作為抬頭顯示器之層合玻璃者，且 其包含熱塑性樹脂， 具有一端、及於與上述一端相反側具有比上述一端更大之厚度之另一端， 具有與抬頭顯示器之顯示區域對應之顯示對應區域， 上述顯示對應區域、與鄰接於上述顯示對應區域之周圍區域可藉由目視而識別，或上述顯示對應區域之色或光澤度與鄰接於上述顯示對應區域之周圍區域之色或光澤度不同。An interlayer film for laminated glass for use as a laminated glass for a head-up display, comprising: a thermoplastic resin having one end and the other end having a thickness larger than the one end on the opposite side to the one end, a display corresponding area corresponding to the display area of the head-up display, wherein the display corresponding area and the surrounding area adjacent to the display corresponding area are visually recognized, or the color or gloss of the display corresponding area corresponds to the display The area around the area has a different color or gloss. 如請求項1之層合玻璃用中間膜，其中上述顯示對應區域之色或光澤度與鄰接於上述顯示對應區域之周圍區域之色或光澤度不同。The interlayer film for laminated glass according to claim 1, wherein the color or gloss of the display corresponding region is different from the color or gloss of the peripheral region adjacent to the display corresponding region. 如請求項2之層合玻璃用中間膜，其中上述顯示對應區域之色與鄰接於該顯示對應區域之區域之色不同。The interlayer film for laminated glass according to claim 2, wherein the color of the display corresponding region is different from the color of the region adjacent to the display corresponding region. 如請求項1至3中任一項之層合玻璃用中間膜，其中於上述顯示對應區域中，厚度自上述一端朝向上述另一端發生變化。The interlayer film for laminated glass according to any one of claims 1 to 3, wherein in the display corresponding region, the thickness changes from the one end toward the other end. 如請求項1至3中任一項之層合玻璃用中間膜，其具有厚度方向之截面形狀為楔狀之部分。The interlayer film for laminated glass according to any one of claims 1 to 3, which has a wedge-shaped cross section in the thickness direction. 如請求項1至3中任一項之層合玻璃用中間膜，其中上述顯示對應區域具有長度方向與寬度方向，且 上述顯示對應區域之寬度方向係將上述一端與上述另一端連結之方向。The interlayer film for laminated glass according to any one of claims 1 to 3, wherein the display corresponding region has a longitudinal direction and a width direction, and the width direction of the display corresponding region is a direction in which the one end is coupled to the other end. 如請求項1至3中任一項之層合玻璃用中間膜，其中上述顯示對應區域之可見光透過率為80%以上。The interlayer film for laminated glass according to any one of claims 1 to 3, wherein the visible light transmittance of the display corresponding region is 80% or more. 如請求項1至3中任一項之層合玻璃用中間膜，其遠離上述顯示對應區域而具有遮蔽區域。The interlayer film for laminated glass according to any one of claims 1 to 3, which has a shielding region away from the display corresponding region. 如請求項1至3中任一項之層合玻璃用中間膜，其中上述熱塑性樹脂為聚乙烯醇縮醛樹脂。The interlayer film for laminated glass according to any one of claims 1 to 3, wherein the thermoplastic resin is a polyvinyl acetal resin. 如請求項1至3中任一項之層合玻璃用中間膜，其包含塑化劑。The interlayer film for laminated glass according to any one of claims 1 to 3, which comprises a plasticizer. 一種層合玻璃，其具備：第1層合玻璃構件、 第2層合玻璃構件、及 如請求項1至10中任一項之層合玻璃用中間膜，且 上述層合玻璃用中間膜配置於上述第1層合玻璃構件與上述第2層合玻璃構件之間。A laminated glass comprising: a first laminated glass member, a second laminated glass member, and an intermediate film for laminated glass according to any one of claims 1 to 10, wherein the laminated glass is disposed in an intermediate film The first laminated glass member is between the first laminated glass member and the second laminated glass member.
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