JPH05310449A - Intermediate film for safety glass and safety glass using the same - Google Patents

Intermediate film for safety glass and safety glass using the same

Info

Publication number
JPH05310449A
JPH05310449A JP4120482A JP12048292A JPH05310449A JP H05310449 A JPH05310449 A JP H05310449A JP 4120482 A JP4120482 A JP 4120482A JP 12048292 A JP12048292 A JP 12048292A JP H05310449 A JPH05310449 A JP H05310449A
Authority
JP
Japan
Prior art keywords
film
resin film
resin
plasticizer
laminated glass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4120482A
Other languages
Japanese (ja)
Inventor
Tsuyoshi Hattori
強司 服部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP4120482A priority Critical patent/JPH05310449A/en
Publication of JPH05310449A publication Critical patent/JPH05310449A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • B32B17/10761—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 containing vinyl acetal
    • 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
    • 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

Landscapes

  • Joining Of Glass To Other Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To obtain an intermediate film and safety glass not scattering glass pieces, having excellent transparency, preventing reduction in sound insulating properties caused by coincidence effects without damaging basic characteristics required for safety glass such as absence of optical strain, capable of exhibiting sound insulating properties for a long period of time. CONSTITUTION:A resin film comprising (a) A polyvinyl acetal resin obtained by acetalization with 6-10C aldehyde and a plasticizer is laminated to a resin film B comprising (b) a polyvinyl acetal resin obtained by acetalization with 1-4C aldehyde to give an intermediate film. The amount of the plasticizer of the resin film A is larger than that if the resin film B or the resin film A is bonded through a transparent film not to permeate the plasticizer to the resin film B. The intermediate film is used to give the objective safety glass.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は、遮音性の優れた合わ
せガラス用中間膜及びそれを用いた合わせガラスに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlayer film for laminated glass having excellent sound insulation and a laminated glass using the same.

【０００２】[0002]

【従来の技術】二枚の透明なガラス板の間に、可塑化ポ
リビニルブチラール樹脂からなる中間膜を接着させた合
わせガラスは、例えば、自動車や建築物の窓ガラスに広
く使用されている。2. Description of the Related Art Laminated glass in which an interlayer film made of a plasticized polyvinyl butyral resin is adhered between two transparent glass plates is widely used, for example, as window glass for automobiles and buildings.

【０００３】この種の合わせガラスは、ガラス破片が飛
散しない、透明性がよい、光学歪みが生じない等の面で
は優れているが、遮音性が劣る。特に、２０００Ｈｚ付
近の中高音域においてコインシデンス効果によって遮音
性が低下する。This type of laminated glass is excellent in that glass fragments do not scatter, has good transparency, and does not cause optical distortion, but has poor sound insulation. In particular, in the mid-high range around 2000 Hz, the sound insulation property is lowered due to the coincidence effect.

【０００４】コインシデンス効果とは、ガラスに音波が
入射したとき、ガラスの剛性と慣性によってガラス面上
を横波が伝導し、この横波と入射音とが共鳴し、音の透
過が起こる現象である。The coincidence effect is a phenomenon in which when a sound wave is incident on glass, a transverse wave is conducted on the glass surface due to the rigidity and inertia of the glass, the transverse wave and the incident sound resonate with each other, and the sound is transmitted.

【０００５】遮音性に対する要求は最近ますます高ま
り、例えば、建築用窓ガラスとしては、季節ごとの外気
温度の変化に影響されないで、常時優れた遮音性能を発
揮するものが要求されている。The demand for sound insulation has increased more and more recently, and for example, as a window glass for construction, one that is always not affected by the change in the outside air temperature every season and exhibits excellent sound insulation performance is demanded.

【０００６】[0006]

【発明が解決しようとする課題】この発明の出願人は、
先に、二種の可塑化ポリビニルアセタール樹脂膜（Ａ）
及び（Ｂ）用い、これを積層して構成した少なくとも二
層の遮音性合わせガラス用中間膜を提案した（特願平３
−８５３０４号）。The applicant of the present invention is
First, two types of plasticized polyvinyl acetal resin film (A)
Using (B) and (B), at least two layers of the interlayer film for sound-insulating laminated glass were proposed (Japanese Patent Application No.
-85304).

【０００７】ここで、樹脂膜（Ａ）は、ポリビニルアル
コールを炭素数６〜１０のアルデヒドでアセタール化し
て得られるポリビニルアセタール樹脂と可塑剤とからな
るものである。Here, the resin film (A) is composed of a polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol with an aldehyde having 6 to 10 carbon atoms and a plasticizer.

【０００８】また、樹脂膜（Ｂ）は、ポリビニルアルコ
ールを炭素数１〜４のアルデヒドでアセタール化して得
られるポリビニルアセタール樹脂と可塑剤とからなるも
のである。The resin film (B) is composed of a polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol with an aldehyde having 1 to 4 carbon atoms and a plasticizer.

【０００９】このような遮音性合わせガラス用中間膜
は、破片の飛散防止や透明性に優れ、、しかもコインシ
デンス効果による遮音性の低下が防止され、遮音性能が
改善される。Such a sound insulating interlayer film for laminated glass is excellent in scattering prevention of fragments and transparency, and further, the sound insulating performance is prevented from lowering due to the coincidence effect, and the sound insulating performance is improved.

【００１０】しかし、ポリビニルアセタール樹脂に対す
る可塑剤の相溶性の違いにより、樹脂膜（Ｂ）から樹脂
膜（Ａ）へ可塑剤が経時的に移行し、また可塑剤が樹脂
膜の表面や界面にブリードし、その結果、合わせガラス
に光学歪みが生じたり、樹脂膜の接着性が低下したりす
ることがある。この点でまだ充分に満足のいくものでは
なく、改善すべき問題がある。However, due to the difference in compatibility of the plasticizer with the polyvinyl acetal resin, the plasticizer migrates from the resin film (B) to the resin film (A) with time, and the plasticizer is transferred to the surface or interface of the resin film. Bleeding may occur, and as a result, optical distortion may occur in the laminated glass or the adhesiveness of the resin film may deteriorate. In this respect, it is still not sufficiently satisfactory, and there are problems to be improved.

【００１１】この発明は、上記の問題を解決するもの
で、その目的とするところは、ガラス破片が飛散しな
い、透明性がよい、光学歪みが生じない等の合わせガラ
スに必要な基本特性を損なうことなく、コインシデンス
効果による遮音性の低下を防止し、遮音性能を長期にわ
たって安定的に発揮することができる合わせガラス用中
間膜及び合わせガラスを提供することにある。The present invention solves the above problems, and aims to impair the basic properties required for laminated glass, such as glass fragments not scattering, good transparency, and no optical distortion. It is an object of the present invention to provide an interlayer film for laminated glass and a laminated glass that can prevent deterioration of sound insulation due to the coincidence effect and can stably exhibit sound insulation performance for a long period of time.

【００１２】[0012]

【課題を解決するための手段】上記の目的は、次ぎのよ
うな合わせガラス用中間膜を用いることにより、達成す
ることができる。すなわち、二種の可塑化ポリビニルア
セタール樹脂膜Ａ及びＢからなる少なくとも二層の積層
樹脂膜であって、樹脂膜Ａは、ポリビニルアルコールを
炭素数６〜１０のアルデヒドでアセタール化して得られ
るポリビニルアセタール樹脂(a)と可塑剤とからなり、
樹脂膜Ｂは、ポリビニルアルコールを炭素数１〜４のア
ルデヒドでアセタール化して得られるポリビニルアセタ
ール樹脂(b) と可塑剤とからなる。The above objects can be achieved by using the following interlayer film for laminated glass. That is, a laminated resin film of at least two layers consisting of two types of plasticized polyvinyl acetal resin films A and B, wherein the resin film A is a polyvinyl acetal obtained by acetalizing polyvinyl alcohol with an aldehyde having 6 to 10 carbon atoms. Consisting of resin (a) and plasticizer,
The resin film B comprises a polyvinyl acetal resin (b) obtained by acetalizing polyvinyl alcohol with an aldehyde having 1 to 4 carbon atoms and a plasticizer.

【００１３】しかも、この場合、樹脂膜Ａの可塑剤量
は、樹脂膜Ｂの可塑剤量よりも多く含有されているか、
或いは樹脂膜Ａと樹脂膜Ｂとは、可塑剤を浸透しない透
明フィルムを介して接着されている中間膜を用いる。Moreover, in this case, is the amount of plasticizer in the resin film A greater than that in the resin film B?
Alternatively, as the resin film A and the resin film B, an intermediate film bonded via a transparent film that does not penetrate the plasticizer is used.

【００１４】ポリビニルアセタール樹脂(a) 及び(b) の
調製において、ポリビニルアルコールとしては、平均重
合度１０００〜３０００のものが好ましい。平均重合度
が１０００未満であると合わせガラスの耐貫通性が低下
する。逆に、平均重合度が３０００を越えると膜の成形
が難しくなる。ポリビニルアルコールのケン化度は、９
５モル％以上が好ましい。ケン化度が９５モル％未満で
は中間膜の耐熱性が低下する。In the preparation of the polyvinyl acetal resins (a) and (b), the polyvinyl alcohol preferably has an average degree of polymerization of 1000 to 3000. If the average degree of polymerization is less than 1000, the penetration resistance of the laminated glass is reduced. On the contrary, if the average degree of polymerization exceeds 3000, it becomes difficult to form the film. The saponification degree of polyvinyl alcohol is 9
It is preferably 5 mol% or more. When the saponification degree is less than 95 mol%, the heat resistance of the interlayer film is lowered.

【００１５】ポリビニルアセタール樹脂(a) の調製にお
いて、炭素数６〜１０のアルデヒドとしては、ｎ−ヘキ
シルアルデヒド、２−エチルブチルアルデヒド、ｎ−ヘ
プチルアルデヒド、ｎ−オクチルアルデヒド、ベンズア
ルデヒド、シンナムアルデヒド等が単独或いは二種以上
組み合わせて用いられる。In the preparation of the polyvinyl acetal resin (a), n-hexylaldehyde, 2-ethylbutyraldehyde, n-heptylaldehyde, n-octylaldehyde, benzaldehyde, cinnamaldehyde and the like are used as the aldehyde having 6 to 10 carbon atoms. They may be used alone or in combination of two or more.

【００１６】また、ポリビニルアセタール樹脂(b) の調
製において、炭素数１〜４のアルデヒドとしては、ホル
ムアルデヒド、アセトアルデヒド、プロピオンアルデヒ
ド、ｎ−ブチルアルデヒド、イソブチルアルデヒド等が
単独或いは二種以上組み合わせて用いられる。In the preparation of the polyvinyl acetal resin (b), formaldehyde, acetaldehyde, propionaldehyde, n-butyraldehyde, isobutyraldehyde, etc. may be used alone or in combination of two or more as the aldehyde having 1 to 4 carbon atoms. ..

【００１７】特に、樹脂(a) が炭素数６〜８のアルデヒ
ドでアセタール化して得られたものであり、樹脂(b) が
炭素数４のｎ−ブチルアルデヒドでアセタール化して得
られたものが好適である。なお、上記樹脂(a) 又は樹脂
(b) の調整において、上述した特定の炭素数以外のアル
デヒドを３０重量％以下の範囲で混合して使用しても差
支えない。Particularly, the resin (a) is obtained by acetalizing with an aldehyde having 6 to 8 carbon atoms, and the resin (b) is obtained by acetalizing with n-butyraldehyde having 4 carbon atoms. It is suitable. The above resin (a) or resin
In the adjustment of (b), aldehydes other than the above-mentioned specific carbon number may be mixed and used in the range of 30% by weight or less.

【００１８】ポリビニルアセタール樹脂(a) 及び(b) の
調製方法としては、公知のいかなる方法でもよい。例え
ば、ポリビニルアルコールを温水に溶解し、得られた水
溶液を所定の温度、例えば０〜９５℃に保持しておい
て、所要の酸触媒及びアルデヒドを加え、攪拌しながら
アセタール化反応を進行させ、次いで反応温度を上げて
熟成し反応を完結させ、その後、中和、水洗及び乾燥を
行って樹脂(a) 及び樹脂(b) の粉末を得る。The polyvinyl acetal resins (a) and (b) may be prepared by any known method. For example, polyvinyl alcohol is dissolved in warm water, the obtained aqueous solution is kept at a predetermined temperature, for example, 0 to 95 ° C., the required acid catalyst and aldehyde are added, and the acetalization reaction proceeds while stirring, Then, the reaction temperature is raised to complete the reaction by aging, followed by neutralization, washing with water and drying to obtain powders of resin (a) and resin (b).

【００１９】ここで、アセタール化度は６０〜７５モル
％が好ましい。アセタール化度が６０モル％未満では、
可塑剤との相溶性が悪くなる。逆に、７５モル％を越え
るアセタール化度の樹脂を得るには長時間の反応時間を
要し、プロセス上好ましくない。The degree of acetalization is preferably 60 to 75 mol%. When the degree of acetalization is less than 60 mol%,
The compatibility with the plasticizer becomes poor. On the contrary, it takes a long reaction time to obtain a resin having an acetalization degree exceeding 75 mol%, which is not preferable in the process.

【００２０】このようにして調製されたポリビニルアセ
タール樹脂(a) とポリビニルアセタール樹脂(b) に、そ
れぞれ所定量の可塑剤を混合し、これを押出法、カレン
ダー法、プレス法等によりシート状に製膜して樹脂膜Ａ
及び樹脂膜Ｂを製造する。The polyvinyl acetal resin (a) and the polyvinyl acetal resin (b) thus prepared are each mixed with a predetermined amount of a plasticizer, and the mixture is formed into a sheet by an extrusion method, a calendar method, a pressing method or the like. Resin film A formed
And the resin film B is manufactured.

【００２１】樹脂膜Ａ及び樹脂膜Ｂの膜厚は、いずれも
０．０５mm以上が好ましい。この膜厚が０．０５mm未満
では、良好な遮音性能や耐候性を発揮するのに充分でな
い。また、全体の膜厚は、厚いほうが遮音性はよいが、
実用的には通常の合わせガラス用中間膜における膜厚と
同様であり、一般に０．３〜１．６mmの範囲とされる。The thickness of each of the resin film A and the resin film B is preferably 0.05 mm or more. If this film thickness is less than 0.05 mm, it is not sufficient to exert good sound insulation performance and weather resistance. Also, the thicker the overall film thickness, the better the sound insulation,
Practically, it is the same as the thickness of a normal interlayer film for laminated glass, and is generally in the range of 0.3 to 1.6 mm.

【００２２】可塑剤としては、この種の中間膜に用いら
れている公知の可塑剤、例えば、トリエチレングリコー
ルジ−２−エチルブチレート、トリエチレングリコール
ジ−２−エチルヘキソエート、トリエチレングリコール
ジカプリレート、トリエチレングリコールジ−ｎ−ヘプ
トエート、テトラエチレングリコールジ−ｎ−ヘプトエ
ート等が好適に用いられる。As the plasticizer, known plasticizers used for this type of interlayer film, for example, triethylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylhexoate, triethylene are used. Glycol dicaprylate, triethylene glycol di-n-heptate, tetraethylene glycol di-n-heptate and the like are preferably used.

【００２３】このような可塑剤は、一般に樹脂(a) 又は
樹脂(b) １００重量部に対して、いずれも３０〜６０重
量部の範囲で所定量が混合される。可塑剤の含有量が３
０重量部未満であると、合わせガラスの耐貫通性が低下
する。逆に、可塑剤の含有量が６０重量部を越えると、
可塑剤が滲み出し、合わせガラスの接着性などに悪影響
がある。Such a plasticizer is generally mixed in a predetermined amount within the range of 30 to 60 parts by weight with respect to 100 parts by weight of the resin (a) or the resin (b). Content of plasticizer is 3
If it is less than 0 parts by weight, the penetration resistance of the laminated glass is lowered. On the contrary, if the content of the plasticizer exceeds 60 parts by weight,
The plasticizer oozes out, which adversely affects the adhesiveness of the laminated glass.

【００２４】この発明において、樹脂膜Ａの可塑剤量
を、樹脂膜Ｂの可塑剤量よりも多く含有させる場合は、
樹脂膜Ａの可塑剤量は４５〜５０重量部の範囲が好まし
く、樹脂膜Ｂの可塑剤量は３５〜４０重量部の範囲が好
ましい。また、樹脂膜Ａと樹脂膜Ｂとを、可塑剤を浸透
しない透明フィルムを介して接着させる場合は、樹脂膜
Ａ及び樹脂膜Ｂの可塑剤量はいずれも、３５〜５０重量
部の範囲が好ましい。この場合、樹脂膜Ａ及び樹脂膜Ｂ
の可塑剤は一般に同量とされるが、互いに異なる可塑剤
量であってもよい。In the present invention, when the resin film A contains a larger amount of plasticizer than the resin film B,
The plasticizer amount of the resin film A is preferably in the range of 45 to 50 parts by weight, and the plasticizer amount of the resin film B is preferably in the range of 35 to 40 parts by weight. When the resin film A and the resin film B are adhered to each other via a transparent film that does not penetrate the plasticizer, the amount of the plasticizer in the resin film A and the resin film B is in the range of 35 to 50 parts by weight. preferable. In this case, the resin film A and the resin film B
The plasticizers are generally in the same amount, but different plasticizer amounts may be used.

【００２５】また、このこの発明において、可塑剤を浸
透しない透明フィルムを用いる場合、この透明フィルム
としては、例えば、ポリエチレンテレフタレート（ＰＥ
Ｔ）やポリブチレンテレフタレート（ＰＢＴ）が好適で
ある。これ等の透明フィルムの厚みは、一般に５０〜１
５０μm のものが使用され、シランカップリング剤、金
属アルコラート等の表面処理剤で表面処理されたものが
好ましい。In the present invention, when a transparent film that does not penetrate the plasticizer is used, the transparent film may be, for example, polyethylene terephthalate (PE).
T) and polybutylene terephthalate (PBT) are suitable. The thickness of these transparent films is generally 50 to 1
Those having a thickness of 50 μm are used, and those having a surface treatment with a surface treatment agent such as a silane coupling agent or a metal alcoholate are preferable.

【００２６】なお、樹脂(a) 又は樹脂(b) には、紫外線
吸収剤、光安定剤、酸化防止剤、接着性調整剤、界面活
性剤、着色剤など合わせガラス用中間膜に使用されてい
る公知の添加剤を配合することができる。特に、耐候性
向上のために、少なくともガラス板と接する樹脂膜の方
に紫外線吸収剤や光安定剤を含有させるのが好ましい。The resin (a) or the resin (b) is used as an interlayer film for laminated glass such as an ultraviolet absorber, a light stabilizer, an antioxidant, an adhesiveness adjusting agent, a surfactant and a coloring agent. Known additives may be added. In particular, in order to improve weather resistance, it is preferable that at least the resin film in contact with the glass plate contains an ultraviolet absorber or a light stabilizer.

【００２７】紫外線吸収剤としては、ベンゾトリアゾー
ル系のもの、例えば、チバガイギー社製のチヌビンＰ
（商品名）、チヌビン３２０（商品名）、チヌビン３２
６（商品名）、チヌビン３２８（商品名）等、もしくは
これらを混合したものが挙げられる。光安定剤として
は、ヒンダードアミン系のもの、例えば、旭電化社製の
アデカスタブＬＡ−５７（商品名）等が挙げられる。The ultraviolet absorber is a benzotriazole type, for example, Tinuvin P manufactured by Ciba-Geigy.
(Product name), Tinubin 320 (Product name), Tinubin 32
6 (trade name), TINUVIN 328 (trade name), or a mixture thereof. Examples of the light stabilizer include hindered amine-based light stabilizers such as ADEKA STAB LA-57 (trade name) manufactured by Asahi Denka Co., Ltd.

【００２８】酸化防止剤としては、フェノール系のも
の、例えば、住友化学社製のスミライザーＢＨＴ（商品
名）、チバガイギー社製のイルガノックス１０１０（商
品名）等が挙げられる。Examples of the antioxidant include phenol-based ones such as Sumilizer BHT (trade name) manufactured by Sumitomo Chemical Co., Ltd. and Irganox 1010 (trade name) manufactured by Ciba-Geigy.

【００２９】接着性調整剤としては、カルボン酸の金属
塩、例えば、オクチル酸、ヘキシル酸、酪酸、酢酸、蟻
酸等のカリウム塩やナトリウム塩が挙げられる。また、
界面活性剤としては、ラウリル硫酸ナトリウム、アルキ
ルベンゼンスルホン酸等が挙げられる。Examples of the adhesion modifier include metal salts of carboxylic acids, for example, potassium salts and sodium salts of octylic acid, hexylic acid, butyric acid, acetic acid, formic acid and the like. Also,
Examples of the surfactant include sodium lauryl sulfate and alkylbenzene sulfonic acid.

【００３０】この発明の合わせガラス用中間膜を製造す
るには、例えば、膜Ａ／膜Ｂ、膜Ａ／膜Ｂ／膜Ａ、膜Ｂ
／膜Ａ／膜Ｂのように重ねてプレスにより積層成形する
方法、或いは、それぞれの樹脂膜を多層押出しにより積
層成形する方法が採用される。To produce the interlayer film for laminated glass of the present invention, for example, film A / film B, film A / film B / film A, film B
/ Membrane A / Membrane B and a method of laminating and molding by pressing or a method of laminating and molding each resin film by multilayer extrusion.

【００３１】また、例えば、膜Ａ／透明フィルム／膜
Ｂ、膜Ａ／透明フィルム／膜Ｂ／透明フィルム／膜Ａ、
膜Ｂ／透明フィルム／膜Ａ／透明フィルム／膜Ｂのよう
に重ねてプレスにより積層成形する方法、或いは、それ
ぞれの樹脂膜を多層押出しにより積層成形する方法が採
用される。Further, for example, membrane A / transparent film / membrane B, membrane A / transparent film / membrane B / transparent film / membrane A,
A method of laminating and molding in the manner of membrane B / transparent film / membrane A / transparent film / membrane B by pressing, or a method of laminating and molding each resin film by multilayer extrusion is adopted.

【００３２】この発明の合わせガラス用中間膜において
は、特に、膜Ｂ／膜Ａ／膜Ｂ、又は膜Ｂ／透明フィルム
／膜Ａ／透明フィルム／膜Ｂのように、樹脂膜Ｂを最外
層に配置するのが、ガラスとの接着性及び耐候性の点で
好ましい。In the interlayer film for laminated glass of the present invention, in particular, the resin film B is the outermost layer such as film B / membrane A / membrane B or membrane B / transparent film / membrane A / transparent film / membrane B. It is preferable to dispose it in terms of adhesion to glass and weather resistance.

【００３３】こうして得られる少なくとも二層の積層樹
脂膜からなる中間膜を用いて合わせガラスを製造するに
は、一般に、二枚の透明なガラス板の間に上記中間膜を
挟み、これを例えばゴムバックに入れ減圧吸引しながら
約７０〜１１０℃で予備接着し、次いで、オートクレー
ブ内で約１２０〜１５０℃で、約１０〜１５ kｇ/cm2の
圧力で本接着を行う。このようにして遮音性の合わせガ
ラスが製造される。In order to produce a laminated glass by using an intermediate film composed of at least two laminated resin films thus obtained, generally, the intermediate film is sandwiched between two transparent glass plates, and this is used as a rubber bag, for example. Pre-bonding is performed at about 70 to 110 ° C. while suctioning under reduced pressure, and then main bonding is performed in an autoclave at about 120 to 150 ° C. at a pressure of about 10 to 15 kg / cm 2 . In this way, a sound-insulating laminated glass is manufactured.

【００３４】また、樹脂膜Ａと樹脂膜Ｂ、或いは樹脂膜
Ａと樹脂膜Ｂと透明フィルムを所定の配置で重ね、これ
を二枚の透明なガラス板の間に挟んで加熱加圧すること
により、中間膜の形成と合わせガラスの製造とを同時に
行う方法も採用される。Further, the resin film A and the resin film B, or the resin film A and the resin film B and the transparent film are superposed in a predetermined arrangement, and they are sandwiched between two transparent glass plates and heated and pressed to form an intermediate layer. A method of simultaneously forming a film and producing a laminated glass is also adopted.

【作用】二種の可塑化ポリビニルアセタール樹脂膜Ａ及
びＢからなる少なくとも二層の積層樹脂膜であって、樹
脂膜Ａが、ポリビニルアルコールを炭素数６〜１０のア
ルデヒドでアセタール化して得られるポリビニルアセタ
ール樹脂(a) と可塑剤とから構成され、樹脂膜Ｂが、ポ
リビニルアルコールを炭素数１〜４のアルデヒドでアセ
タール化して得られるポリビニルアセタール樹脂(b) と
可塑剤とから構成されると、拘束層的効果により音エネ
ルギーが吸収され、特に、２０００Ｈｚ付近の中高音域
おいてコインシデンス効果による遮音性の低下が防止さ
れる。A laminated resin film of at least two layers comprising two kinds of plasticized polyvinyl acetal resin films A and B, wherein the resin film A is obtained by acetalizing polyvinyl alcohol with an aldehyde having 6 to 10 carbon atoms. When it is composed of an acetal resin (a) and a plasticizer, and the resin film B is composed of a polyvinyl acetal resin (b) obtained by acetalizing polyvinyl alcohol with an aldehyde having 1 to 4 carbon atoms and a plasticizer, Sound energy is absorbed by the constraining layer effect, and in particular, a decrease in sound insulation due to the coincidence effect is prevented in the mid-high range around 2000 Hz.

【００３５】しかし、この場合、樹脂膜ＡとＢの可塑剤
含有量が同じであると、樹脂膜Ａの樹脂(a) は樹脂膜Ｂ
の樹脂(b) に比べて可塑剤との相溶性が良いので、樹脂
膜Ｂから樹脂膜Ａへ可塑剤が経時的に移行し、また可塑
剤が樹脂膜の表面や界面にブリードし、その結果、合わ
せガラスに光学歪みが生じたり、樹脂膜の接着性が低下
したりすることがある。However, in this case, when the plasticizer contents of the resin films A and B are the same, the resin (a) of the resin film A becomes the resin film B.
Since the compatibility with the plasticizer is better than that of the resin (b), the plasticizer migrates from the resin film B to the resin film A over time, and the plasticizer bleeds to the surface or interface of the resin film. As a result, optical distortion may occur in the laminated glass, or the adhesiveness of the resin film may deteriorate.

【００３６】そこで、樹脂膜Ａの可塑剤量を、樹脂膜Ｂ
の可塑剤量よりも多く含有させておくと、樹脂膜Ａ、Ｂ
間での可塑剤の移行が抑えられる。また、樹脂膜ＡとＢ
の可塑剤含有量が同じであっても、樹脂膜ＡとＢとを、
可塑剤を浸透しない透明フィルムを介して接着させてお
くと、樹脂膜Ａ、Ｂ間での可塑剤の移行が防止される。Therefore, the plasticizer amount of the resin film A is changed to the resin film B.
Resin film A, B
Transfer of plasticizer between the two is suppressed. In addition, the resin films A and B
Even if the plasticizer contents of are the same, the resin films A and B are
If the plasticizer is adhered through a transparent film that does not penetrate, migration of the plasticizer between the resin films A and B is prevented.

【００３７】[0037]

【実施例】以下、この発明の実施例及び比較例を示す。実施例１ 樹脂(a) 及び樹脂膜Ａの調製 平均重合度１７００、ケン化度９８．９モル％のポリビ
ニルアルコール１９３ｇを、純水２９００ｇに加えて加
温溶解した。この溶液の温度を２８℃に調節し、３５％
塩酸２０１ｇとｎ−ヘキシルアルデヒド１９２ｇを加え
て液温を２℃に下げてこの温度を保持して反応物を析出
させた。EXAMPLES Examples and comparative examples of the present invention will be shown below. Example 1 Preparation of Resin (a) and Resin Film A 193 g of polyvinyl alcohol having an average polymerization degree of 1700 and a saponification degree of 98.9 mol% was added to 2900 g of pure water and dissolved by heating. Adjust the temperature of this solution to 28 ° C
Hydrochloric acid (201 g) and n-hexylaldehyde (192 g) were added, the liquid temperature was lowered to 2 ° C., and this temperature was maintained to precipitate the reaction product.

【００３８】その後、液温を３０℃で５時間保持して反
応を完了させ、中和、水洗、乾燥を経て、白色粉末状の
ポリビニルヘキシラール樹脂(a) を調整した。この樹脂
(a)のアセタール化度は６７．５モル％であった。Then, the liquid temperature was maintained at 30 ° C. for 5 hours to complete the reaction, and the white powdery polyvinylhexyl resin (a) was prepared through neutralization, washing with water and drying. This resin
The degree of acetalization of (a) was 67.5 mol%.

【００３９】上記樹脂(a) １００重量部と可塑剤として
トリエチレングリコールジ−２−エチルブチレート５０
重量部とを混合し、これをミキシングロールで充分に溶
融混練した後、プレス成形機で１５０℃、３０分間プレ
ス成形して、厚さ０．２mmの樹脂膜Ａを得た。100 parts by weight of the above resin (a) and 50 parts of triethylene glycol di-2-ethylbutyrate as a plasticizer.
The mixture was mixed with 1 part by weight, sufficiently melted and kneaded with a mixing roll, and press-molded with a press molding machine at 150 ° C. for 30 minutes to obtain a resin film A having a thickness of 0.2 mm.

【００４０】樹脂(b) 及び樹脂膜Ｂの調製 平均重合度１７００、ケン化度９９．２モル％のポリビ
ニルアルコール１９０ｇを、純水２９００ｇに加えて加
温溶解した。この溶液の温度を２０℃に調節し、３５％
塩酸２０１ｇとｎ−ブチルアルデヒド１２４ｇを加えて
液温を８℃に下げてこの温度を保持して反応物を析出さ
せた。Preparation of Resin (b) and Resin Film B 190 g of polyvinyl alcohol having an average polymerization degree of 1700 and a saponification degree of 99.2 mol% was added to 2900 g of pure water and dissolved by heating. The temperature of this solution was adjusted to 20 ° C,
Hydrochloric acid (201 g) and n-butyraldehyde (124 g) were added, the liquid temperature was lowered to 8 ° C., and this temperature was maintained to precipitate the reaction product.

【００４１】その後、液温を５０℃で４時間保持して反
応を完了させ、中和、水洗、乾燥を経て、白色粉末状の
ポリビニルブチラール樹脂(b) を調製した。この樹脂
(b) のアセタール化度は６６．３モル％であった。Then, the liquid temperature was maintained at 50 ° C. for 4 hours to complete the reaction, and the mixture was neutralized, washed with water, and dried to prepare a white powdery polyvinyl butyral resin (b). This resin
The degree of acetalization of (b) was 66.3 mol%.

【００４２】上記樹脂(b) １００重量部と可塑剤として
トリエチレングリコールジ−２−エチルブチレート４０
重量部とを混合し、これをミキシングロールで充分に溶
融混練し、この混練物に、紫外線吸収剤（チヌビンＰ：
チバガイギー社製）０．１６重量部、酸化防止剤（スミ
ライザーＢＨＴ：住友化学社製）０．１６重量部、接着
性調整剤（酢酸カリウム）０．１重量部をそれぞれ添加
して混練した。100 parts by weight of the above resin (b) and 40 parts of triethylene glycol di-2-ethylbutyrate as a plasticizer.
1 part by weight, and this is sufficiently melted and kneaded with a mixing roll, and the kneaded product is mixed with an ultraviolet absorber (Tinuvin P:
0.16 parts by weight of an antioxidant (Sumilyzer BHT: manufactured by Sumitomo Chemical Co., Ltd.) and 0.1 part by weight of an adhesiveness adjusting agent (potassium acetate) were added and kneaded.

【００４３】その後、この混練物をプレス成形機で１５
０℃、３０分間プレス成形して、厚さ０．２mmの樹脂膜
Ｂを得た。Thereafter, this kneaded product was subjected to a press molding machine for 15
The resin film B having a thickness of 0.2 mm was obtained by press molding at 0 ° C. for 30 minutes.

【００４４】中間膜及び合わせガラスの製造 上記の樹脂膜ＡとＢを用い、これを膜Ｂ／膜Ａ／膜Ｂの
順に重ね合わせ、両側から透明なフロートガラス（縦３
０cm×横３０cm×厚さ３mm）で挟み、これをゴムバッグ
内に入れ２０mmHgの真空で２０分間脱気した後、脱気し
たまま９０℃のオーブンに移し、さらに９０℃で３０分
間保持しつつ真空プレスした。 Manufacture of Intermediate Film and Laminated Glass The resin films A and B described above were laminated in the order of film B / membrane A / membrane B, and transparent float glass (length 3
(0 cm × width 30 cm × thickness 3 mm), put it in a rubber bag and evacuate it for 20 minutes under a vacuum of 20 mmHg, then transfer it to an oven at 90 ° C while keeping it degassed and hold it at 90 ° C for 30 minutes. Vacuum pressed.

【００４５】このようにして予備接着された合わせガラ
スを、エアー式オートクレーブで温度１３５℃、圧力１
２ kｇ/cm2の条件で２０分間本接着を行い、中間膜の形
成と合わせガラスの製造とを同時に行った。The laminated glass pre-bonded in this manner was heated at a temperature of 135 ° C. and a pressure of 1 by an air type autoclave.
The main adhesion was performed for 20 minutes under the condition of 2 kg / cm 2 , and the formation of the intermediate film and the production of the laminated glass were performed simultaneously.

【００４６】この合わせガラスについて、ブリード、光
学歪み、遮音性を、次の方法で評価した。その結果をま
とめて表１に示す。With respect to this laminated glass, bleeding, optical distortion and sound insulation were evaluated by the following methods. The results are summarized in Table 1.

【００４７】(1) ブリード 予め、上記樹脂膜Ａの表面に黒色のフェルトペン（マジ
ックインキ）で幅約５mmの直線を描いておいて合わせガ
ラスを製造し、この合わせガラスを５０℃で１週間放置
した後、描かれた直線のぼけ具合を目視で評価し、全く
ぼけない場合を○とし、それ以外を程度により△、×と
した。(1) Bleed A laminated glass having a width of about 5 mm was previously drawn on the surface of the resin film A with a black felt pen (magic ink) to produce laminated glass, and the laminated glass was heated at 50 ° C. for 1 week. After standing, the degree of blurring of the drawn straight line was visually evaluated, and when no blur was observed, it was rated as ◯, and the other cases were rated as Δ and x depending on the degree.

【００４８】(2) 光学歪み ＪＩＳ Ｒ３２１２に準拠し、合わせガラスを介して前
方の物体を透視し、物体の歪み具合を目視で評価し、歪
みが全く生じない場合を○とし、それ以外を程度により
△、×とした。(2) Optical distortion: According to JIS R3212, the front object is seen through a laminated glass, and the degree of distortion of the object is visually evaluated. Therefore, it was evaluated as Δ or ×.

【００４９】(3) 遮音性能 合わせガラスについて、２０℃における音周波数（Ｈ
ｚ）と透過損失（ｄＢ）との関係を示すグラフを作成
し、音周波数２０００Ｈｚ近辺における極小の透過損失
（ＴＬ値）を求めた。(3) Sound insulation performance For laminated glass, the sound frequency (H
A graph showing the relationship between z) and the transmission loss (dB) was created, and the minimum transmission loss (TL value) near the sound frequency of 2000 Hz was obtained.

【００５０】実施例２ 実施例１において、樹脂(a) １００重量部に対する可塑
剤量を４８重量部に変更し、また樹脂(b) １００重量部
に対する可塑剤量を４２重量部に変更した。それ以外は
実施例１と同様に行った。その結果をまとめて表１に示
す。 Example 2 In Example 1, the amount of plasticizer per 100 parts by weight of the resin (a) was changed to 48 parts by weight, and the amount of plasticizer per 100 parts by weight of the resin (b) was changed to 42 parts by weight. Other than that was performed like Example 1. The results are summarized in Table 1.

【００５１】実施例３ 実施例１において、樹脂(a) １００重量部に対する可塑
剤量を５２重量部に変更し、また樹脂(b) １００重量部
に対する可塑剤量を３８重量部に変更した。それ以外は
実施例１と同様に行った。その結果をまとめて表１に示
す。 Example 3 In Example 1, the amount of plasticizer per 100 parts by weight of the resin (a) was changed to 52 parts by weight, and the amount of plasticizer per 100 parts by weight of the resin (b) was changed to 38 parts by weight. Other than that was performed like Example 1. The results are summarized in Table 1.

【００５２】実施例４ 実施例１で調製した樹脂膜Ａ及び樹脂膜Ｂを用意した。
また、厚さ１２０μm の透明なポリエチレンテレフタレ
ートフィルム（ＰＥＴ）の両面に、テトラブチルジルコ
ネートの３％リグロイン溶液を塗布し、約１０５℃で乾
燥させて、表面処理ＰＥＴを用意した。 Example 4 Resin films A and B prepared in Example 1 were prepared.
Further, a 3% ligroin solution of tetrabutyl zirconate was applied to both sides of a transparent polyethylene terephthalate film (PET) having a thickness of 120 μm and dried at about 105 ° C. to prepare a surface-treated PET.

【００５３】上記の樹脂膜Ａ、樹脂膜Ｂ及び表面処理Ｐ
ＥＴを用い、これを膜Ｂ／処理ＰＥＴ／膜Ａ／処理ＰＥ
Ｔ／膜Ｂの順に重ね合わせ、両側から透明なフロートガ
ラス（縦３０cm×横３０cm×厚さ３mm）で挟み、実施例
１と同様にして中間膜の形成と合わせガラスの製造とを
同時に行った。Resin film A, resin film B and surface treatment P described above
Using ET, this is membrane B / treated PET / membrane A / treated PE
T / membrane B were superposed in this order, sandwiched from both sides by transparent float glass (length 30 cm × width 30 cm × thickness 3 mm), and in the same manner as in Example 1, formation of an intermediate film and production of laminated glass were carried out simultaneously. ..

【００５４】この合わせガラスについて、実施例１と同
様にして、ブリード、光学歪み、遮音性を、次の方法で
評価した。その結果をまとめて表１に示す。For this laminated glass, bleeding, optical distortion and sound insulation were evaluated in the same manner as in Example 1 by the following methods. The results are summarized in Table 1.

【００５５】実施例５ 実施例４において、表面処理ＰＥＴに替えて、厚さ１２
０μm の透明なポリブチレンテレフタレートフィルム
（ＰＢＴ）の両面に、テトラブチルジルコネートの３％
リブロイン溶液を塗布して得られた、表面処理ＰＢＴを
用いた。また、樹脂(a) １００重量部に対する可塑剤量
を４５重量部に変更した。それ以外は実施例４と同様に
行った。その結果をまとめて表１に示す。 Example 5 In Example 4, instead of the surface-treated PET, a thickness of 12 was used.
3% of tetrabutyl zirconate on both sides of 0 μm transparent polybutylene terephthalate film (PBT)
The surface-treated PBT obtained by applying the rebroin solution was used. Further, the amount of the plasticizer was changed to 45 parts by weight with respect to 100 parts by weight of the resin (a). Other than that was performed like Example 4. The results are summarized in Table 1.

【００５６】実施例６ 実施例４において、表面処理ＰＥＴに替えて、表面処理
をしていない厚さ１２０μm の透明なポリエチレンテレ
フタレートフィルム（ＰＥＴ）を用いた。それ以外は実
施例４と同様に行った。その結果をまとめて表１に示
す。 Example 6 In Example 4, the surface-treated PET was replaced by a transparent polyethylene terephthalate film (PET) having a thickness of 120 μm which was not surface-treated. Other than that was performed like Example 4. The results are summarized in Table 1.

【００５７】比較例１ 実施例１において、樹脂膜Ｂの可塑剤量を４０重量部に
変更した。それ以外は実施例１と同様に行った。その結
果をまとめて表１に示す。 Comparative Example 1 In Example 1, the amount of plasticizer in the resin film B was changed to 40 parts by weight. Other than that was performed like Example 1. The results are summarized in Table 1.

【００５８】比較例２ 実施例１において、樹脂膜Ｂを用いずに、樹脂膜Ａのみ
を用いた。但し、樹脂膜Ａの厚みは０．７６mmとした。
それ以外は実施例１と同様に行った。その結果をまとめ
て表１に示す。 Comparative Example 2 In Example 1, only the resin film A was used without using the resin film B. However, the thickness of the resin film A was 0.76 mm.
Other than that was performed like Example 1. The results are summarized in Table 1.

【００５９】比較例３ 実施例１において、樹脂膜Ａを用いずに、樹脂膜Ｂのみ
を用いた。但し、樹脂膜Ｂの厚みは０．７６mmとした。
それ以外は実施例１と同様に行った。その結果をまとめ
て表１に示す。 Comparative Example 3 In Example 1, only the resin film B was used without using the resin film A. However, the thickness of the resin film B was 0.76 mm.
Other than that was performed like Example 1. The results are summarized in Table 1.

【００６０】[0060]

【表１】 [Table 1]

【００６１】[0061]

【発明の効果】上述の通り、この発明において、合わせ
ガラスの中間膜は、二種の可塑化ポリビニルアセタール
樹脂膜Ａ及びＢからなる少なくとも二層の積層樹脂膜で
あって、樹脂膜Ａは、ポリビニルアルコールを炭素数６
〜１０のアルデヒドでアセタール化して得られるポリビ
ニルアセタール樹脂(a) と可塑剤とからなり、樹脂膜Ｂ
は、ポリビニルアルコールを炭素数１〜４のアルデヒド
でアセタール化して得られるポリビニルアセタール樹脂
(b) と可塑剤とからなるので、その拘束層的効果により
音エネルギーが吸収され、コインシデンス効果による遮
音性の低下を防止することができる。As described above, in the present invention, the interlayer film of the laminated glass is a laminated resin film of at least two layers consisting of two kinds of plasticized polyvinyl acetal resin films A and B, and the resin film A is Polyvinyl alcohol has 6 carbon atoms
A resin film B comprising a polyvinyl acetal resin (a) obtained by acetalization with an aldehyde of 10 to 10 and a plasticizer.
Is a polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol with an aldehyde having 1 to 4 carbon atoms.
Since it is composed of (b) and a plasticizer, sound energy is absorbed by the effect of the constraining layer, and it is possible to prevent a decrease in sound insulation due to the coincidence effect.

【００６２】しかも、樹脂膜Ａの可塑剤量は樹脂膜Ｂの
可塑剤量よりも多く含有されているか、或いは樹脂膜Ａ
と樹脂膜Ｂとは可塑剤を浸透しない透明フィルムを介し
て接着されており、それにより樹脂膜Ａ、Ｂ間での可塑
剤の移行が抑えられ、遮音性能を長期にわたって安定的
に発揮することができる。また、可塑剤の移行による合
わせガラスの光学歪みの発生が防止でき、また樹脂膜の
接着性の低下が防止できるとういう利点がある。Moreover, the plasticizer amount of the resin film A is larger than that of the resin film B, or the resin film A
The resin film B and the resin film B are adhered to each other through a transparent film that does not penetrate the plasticizer, which suppresses the transfer of the plasticizer between the resin films A and B, and exhibits stable sound insulation performance over a long period of time. You can Further, there are advantages that optical distortion of the laminated glass due to migration of the plasticizer can be prevented, and deterioration of adhesiveness of the resin film can be prevented.

【００６３】また、この発明において、合わせガラスの
中間膜は、透明性のよい可塑化ポリビニルアセタール樹
脂膜、或いはこの樹脂膜と可塑剤を浸透しない透明フィ
ルムにより構成されているので、衝撃に対する耐貫通性
がよく、またガラスと中間膜との接着性もよく、破損時
にガラスの破片が飛散しなく、透明性で安全性に優れて
いる。Further, in the present invention, since the interlayer film of the laminated glass is composed of a plasticized polyvinyl acetal resin film having good transparency, or this resin film and a transparent film which does not penetrate the plasticizer, it is resistant to impact penetration. It also has good adhesiveness between the glass and the interlayer film, does not scatter glass fragments at the time of breakage, is transparent and has excellent safety.

【００６４】したがって、この発明の合わせガラスの中
間膜及び合わせガラスは、特に、高い遮音性能が要求さ
れる建築物の窓ガラス等に好適に使用される。Therefore, the interlayer film of laminated glass and the laminated glass of the present invention are particularly suitable for use as window glass for buildings and the like which require high sound insulation performance.

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 二種の可塑化ポリビニルアセタール樹脂
膜Ａ及びＢからなる少なくとも二層の積層樹脂膜であっ
て、樹脂膜Ａは、ポリビニルアルコールを炭素数６〜１
０のアルデヒドでアセタール化して得られるポリビニル
アセタール樹脂(a) と可塑剤とからなり、樹脂膜Ｂは、
ポリビニルアルコールを炭素数１〜４のアルデヒドでア
セタール化して得られるポリビニルアセタール樹脂(b)
と可塑剤とからなり、樹脂膜Ａの可塑剤量は、樹脂膜Ｂ
の可塑剤量よりも多く含有されていることを特徴とする
合わせガラス用中間膜。1. A laminated resin film of at least two layers comprising two kinds of plasticized polyvinyl acetal resin films A and B, wherein the resin film A contains polyvinyl alcohol having 6 to 1 carbon atoms.
The resin film B is composed of a polyvinyl acetal resin (a) obtained by acetalization with an aldehyde of 0 and a plasticizer.
Polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol with an aldehyde having 1 to 4 carbon atoms (b)
And a plasticizer, and the plasticizer amount of the resin film A is
The interlayer film for laminated glass is characterized in that it is contained in an amount larger than that of the plasticizer. 【請求項２】 二枚の透明なガラス板の間に、請求項１
記載の合わせガラス用中間膜が接着されていることを特
徴とする合わせガラス。2. The method according to claim 1, which is provided between two transparent glass plates.
A laminated glass, characterized in that the interlayer film for laminated glass described above is adhered. 【請求項３】 二種の可塑化ポリビニルアセタール樹脂
膜Ａ及びＢからなる少なくとも二層の積層樹脂膜であっ
て、樹脂膜Ａは、ポリビニルアルコールを炭素数６〜１
０のアルデヒドでアセタール化して得られるポリビニル
アセタール樹脂(a) と可塑剤とからなり、樹脂膜Ｂは、
ポリビニルアルコールを炭素数１〜４のアルデヒドでア
セタール化して得られるポリビニルアセタール樹脂(b)
と可塑剤とからなり、樹脂膜Ａと樹脂膜Ｂとは、可塑剤
を浸透しない透明フィルムを介して接着されていること
を特徴とする合わせガラス用中間膜。3. A laminated resin film of at least two layers comprising two kinds of plasticized polyvinyl acetal resin films A and B, wherein the resin film A contains polyvinyl alcohol having 6 to 1 carbon atoms.
The resin film B is composed of a polyvinyl acetal resin (a) obtained by acetalization with an aldehyde of 0 and a plasticizer.
Polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol with an aldehyde having 1 to 4 carbon atoms (b)
And a plasticizer, and the resin film A and the resin film B are adhered to each other via a transparent film that does not penetrate the plasticizer. 【請求項４】 二枚の透明なガラス板の間に、請求項３
記載の合わせガラス用中間膜が接着されていることを特
徴とする合わせガラス。4. The method according to claim 3, which is provided between two transparent glass plates.
A laminated glass, characterized in that the interlayer film for laminated glass described above is adhered.
JP4120482A 1992-05-13 1992-05-13 Intermediate film for safety glass and safety glass using the same Pending JPH05310449A (en)

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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
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ID=14787272

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