JPH0797240A - Interlayer for laminated glass - Google Patents

Interlayer for laminated glass

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Publication number
JPH0797240A
JPH0797240A JP24114393A JP24114393A JPH0797240A JP H0797240 A JPH0797240 A JP H0797240A JP 24114393 A JP24114393 A JP 24114393A JP 24114393 A JP24114393 A JP 24114393A JP H0797240 A JPH0797240 A JP H0797240A
Authority
JP
Japan
Prior art keywords
layer
resin
laminated glass
thickness
sound insulation
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.)
Granted
Application number
JP24114393A
Other languages
Japanese (ja)
Other versions
JP3335436B2 (en
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 JP24114393A priority Critical patent/JP3335436B2/en
Publication of JPH0797240A publication Critical patent/JPH0797240A/en
Application granted granted Critical
Publication of JP3335436B2 publication Critical patent/JP3335436B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Joining Of Glass To Other Materials (AREA)

Abstract

PURPOSE:To improve the sound insulation and optical strain of the laminated glass by using a laminated film composed of specific two kinds of polyvinyl acetal resin as an interlayer. CONSTITUTION:A polyvinyl alcohol having 500-3000 of average polymerization degree and 78-92% of saponification degree is reacted with a 4-6C aldehyde to obtain a polyvinyl acetal resin having 40mol% or higher of acetalization degree, and 100 pts.wt. of this resin is kneaded with 35-65 pts.wt. of a plasticizer to obtain a resin film (A) having thickness of >=0.05mm. Besides, a polyvinyl alcohol having average polymerization degree of 500-3000 and saponification degree of >=96% is reacted with a 3-4C aldehyde to obtain a polyvinyl acetal resin having >=50mol% of acetalization degree, and 100 pts.wt. of this resin is kneaded with 25-55 pts.wt. of a plasticizer to obtain a resin film (B). It is preferable that the objective interlayer be made up of a sum of two or more layers of the films A and B (esp. B/A/B construction); the interlayer is so constituted as to be 0.3-1.6mm in the overall thickness and also that the thicknesses of A and B are 9-25% and >=0.2mm of a total respectively.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は、遮音性に優れ、且つ、
光学歪みの少ない合わせガラス用中間膜に関するもので
ある。
BACKGROUND OF THE INVENTION The present invention is excellent in sound insulation and
The present invention relates to an interlayer film for laminated glass with little optical distortion.

【0002】[0002]

【従来の技術】一般に、一対のガラス板間に中間膜を介
在させた合わせガラスは、破損時に破片が飛散しなくて
安全性に優れているため、例えば、自動車等の交通車両
の窓ガラスや建築物の窓ガラス等に広く用いられてい
る。
2. Description of the Related Art Generally, a laminated glass having an interlayer film interposed between a pair of glass plates is excellent in safety because fragments are not scattered when it is broken. Widely used for window glass of buildings.

【0003】こうした合わせガラス用の中間膜のうち、
可塑剤の添加により可塑化されたポリビニルブチラール
樹脂膜は、ガラスとの優れた接着性、強靱な引っ張り強
度、高い透明性等を兼ね備えており、この膜を用いて構
成した合わせガラスは特に車両用の窓ガラスとして好適
である。
Of these interlayer films for laminated glass,
The polyvinyl butyral resin film plasticized by the addition of a plasticizer has excellent adhesiveness with glass, tough tensile strength, high transparency, etc., and laminated glass made using this film is especially suitable for vehicles. It is suitable as a window glass.

【0004】一般に、遮音性は、周波数の変化に応じて
透過損失量として示され、その透過損失量は、JIS
A4708では、図1中に実線で示すように、500H
z以上において遮音等級に応じてそれぞれ一定値で規定
されている。ところで、ガラス板の遮音性は、図1中に
破線で示すように2000Hzを中心とする周波数領域
ではコインシデンス効果により著しく低下する(図1中
の破線の谷部がコインシデンス効果による遮音性の低下
に相当し、所定の遮音性を保持しないことを示す)。
Generally, sound insulation is shown as a transmission loss amount according to a change in frequency, and the transmission loss amount is JIS.
In the A4708, as shown by the solid line in FIG.
Above z, it is regulated by a constant value according to the sound insulation grade. By the way, the sound insulation of the glass plate is remarkably deteriorated by the coincidence effect in the frequency region centered on 2000 Hz as shown by the broken line in FIG. 1 (the valley portion of the broken line in FIG. 1 causes deterioration of the sound insulation by the coincidence effect). Corresponding, indicating that it does not maintain the prescribed sound insulation).

【0005】ここで、コインシデンス効果とは、ガラス
板に音波が入射したとき、ガラス板の剛性と慣性によっ
て、ガラス面上を横波が伝導して横波と入射音とが共鳴
し、その結果音の透過が起こる現象をいう。
Here, the coincidence effect means that when a sound wave is incident on the glass plate, the transverse wave is conducted on the glass surface due to the rigidity and inertia of the glass plate and the transverse wave and the incident sound resonate with each other. A phenomenon in which transmission occurs.

【0006】従来の合わせガラスは、破片の飛散防止の
面では優れているものの、遮音性の面では2000Hz
を中心とする周波数領域において、やはりコインシデン
ス効果による遮音性の低下が避けられず、この点の改善
が求められている。
Conventional laminated glass is excellent in terms of preventing scattering of fragments, but is 2000 Hz in terms of sound insulation.
In the frequency region centered on, the decrease in sound insulation due to the coincidence effect is unavoidable, and improvement of this point is required.

【0007】一方、人間の聴覚は、等ラウドネス曲線か
ら1000〜6000Hzの範囲では他の周波数領域に
比べ非常に高い感度を示すことが知られており、コイン
シデンス効果による遮音性の落込みを解消することが防
音に極めて重要であることが判る。
On the other hand, it is known that human hearing has a very high sensitivity in the range of 1000 to 6000 Hz from the equal loudness curve as compared with other frequency regions, and eliminates the deterioration of sound insulation due to the coincidence effect. It turns out that it is extremely important for soundproofing.

【0008】合わせガラスの遮音性を向上するには、上
記の如きコインシデンス効果を緩和して、コインシデン
ス効果によって生ずる透過損失量の極小部(以下、この
極小部の透過損失量をTL値という、図1参照)の低下
を防ぐ必要がある。
In order to improve the sound insulation of the laminated glass, the coincidence effect as described above is relaxed, and the minimum portion of the transmission loss amount caused by the coincidence effect (hereinafter, the transmission loss amount of this minimum portion is referred to as TL value, It is necessary to prevent the decrease of (see 1).

【0009】従来、TL値の低下を防ぐ手段として、合
わせガラスの質量の増大、ガラスの複層化、ガラス面積
の細分化、ガラス板支持手段の改善等、種々の方策が提
案されている。しかし、これらはいずれも十分満足でき
る効果をもたらさない上に、コスト的にも実用的に採用
するに妥当な価格になっていない。
Conventionally, various measures have been proposed as means for preventing a decrease in the TL value, such as increasing the mass of laminated glass, making glass into multiple layers, subdividing the glass area, and improving the glass plate supporting means. However, none of them bring a sufficiently satisfactory effect, and the price is not reasonable enough for practical use.

【0010】遮音性に対する要求は最近増々高まり、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を発揮するもの
が要求されるようになってきている。
The demand for sound insulation has been increasing recently, and, for example, as window glass for construction, there has been a demand for one that always exhibits excellent sound insulation without being affected by the change in the outside air temperature every season. There is.

【0011】合わせガラスの遮音性の向上を企図した中
間膜の先行技術としては、例えば、特開平2─2297
42号公報に記載の如く、ガラス転移温度が15℃以下
である樹脂層と可塑化ポリビニルアセタール膜とを積層
してなり、コインシデンス効果に起因する遮音性の低下
を防止した中間膜が提案されている。
As a prior art of an interlayer film intended to improve the sound insulation of laminated glass, for example, Japanese Patent Laid-Open No. 2297/1990 is proposed.
As described in Japanese Patent Laid-Open No. 42-42, an interlayer film has been proposed which is formed by laminating a resin layer having a glass transition temperature of 15 ° C. or lower and a plasticized polyvinyl acetal film, and which prevents a decrease in sound insulation due to the coincidence effect. There is.

【0012】[0012]

【発明が解決しようとする課題】この中間膜は、確かに
遮音性の改善をもたらすことが認められる。しかし、異
種材料が積層されている場合、それぞれの屈折率が異な
るために光学的な歪みが生じたり、界面での物質移動が
生じて遮音性が低下する等の問題点があった。
It will be appreciated that this interlayer does indeed provide improved sound insulation. However, when different kinds of materials are laminated, there is a problem that optical distortion occurs due to the difference in refractive index between the different materials, and mass transfer occurs at the interface to reduce sound insulation.

【0013】本発明は、上記の如き従来の中間膜の問題
点を解消し、透明性、樹脂膜界面での接着性、衝撃エネ
ルギー吸収性、ガラスとの接着性等の合わせガラスに必
要な基本性能を損なうことなく、常温付近のコインシデ
ンス効果の緩和によってTL値を高め、これにより優れ
た遮音性を発揮し、加えて、光学歪みが改善され、且
つ、膜の合わせ加工工程における作業性がよい合わせガ
ラス用中間膜を提供することを目的としてなされたもの
である。
The present invention solves the above-mentioned problems of conventional interlayer films, and provides the basics necessary for laminated glass such as transparency, adhesiveness at the resin film interface, impact energy absorption, and adhesiveness with glass. The TL value is increased by mitigating the coincidence effect at around room temperature without impairing the performance, thereby exhibiting excellent sound insulation, optical distortion is improved, and workability in the film alignment process is good. The purpose of the invention is to provide an interlayer film for laminated glass.

【0014】[0014]

【課題を解決するための手段】本発明は、アセタール基
の炭素数が4〜6であり、且つ、酸素原子を介してアセ
チル基が結合しているエチレン基の、主鎖の全エチレン
基に対するモル分率が8〜22モル%であるポリビニル
アセタール樹脂(a)と可塑剤とからなる少なくとも一
つの層(A)と、アセタール基の炭素数が3又は4であ
り、且つ、酸素原子を介してアセチル基が結合している
エチレン基の主鎖の全エチレン基に対するモル分率が4
モル%以下であるポリビニルアセタール樹脂(b)と可
塑剤とからなる少なくとももう一つの層(B)との積層
膜であって、その積層膜を構成する層のうち、層(A)
の厚みが、中間膜全体の厚みの9〜25%で、且つ、
0.05mm以上である合わせガラス用中間膜である。
According to the present invention, an acetal group having 4 to 6 carbon atoms and an ethylene group to which an acetyl group is bonded via an oxygen atom, based on all ethylene groups in the main chain. At least one layer (A) composed of a polyvinyl acetal resin (a) having a mole fraction of 8 to 22 mol% and a plasticizer, an acetal group having 3 or 4 carbon atoms, and an oxygen atom. The molar ratio of the main chain of ethylene groups to which acetyl groups are bonded to all ethylene groups is 4
A layered film of a polyvinyl acetal resin (b) of not more than mol% and at least another layer (B) composed of a plasticizer, which is a layer (A) among layers constituting the layered film.
Is 9 to 25% of the total thickness of the interlayer film, and
It is an interlayer film for laminated glass having a thickness of 0.05 mm or more.

【0015】本発明において用いられる、ポリビニルア
セタール樹脂(a)及び(b)は、ポリビニルアルコー
ルをアルデヒドでアセタール化することにより得られ、
通常、主鎖のエチレン基にアセタール基とアセチル基と
水酸基を有する。
The polyvinyl acetal resins (a) and (b) used in the present invention are obtained by acetalizing polyvinyl alcohol with an aldehyde,
Usually, it has an acetal group, an acetyl group, and a hydroxyl group in the ethylene group of the main chain.

【0016】ポリビニルアセタール樹脂(a)及び
(b)の製造原料であるポリビニルアルコールの平均重
合度は、好ましくは500〜3000である。重合度が
500未満であると、合わせガラスの耐貫通性が劣り、
逆に、3000を超えると、強度が大き過ぎて安全ガラ
スとして通常は用いられないからである。より好ましい
重合度は1000〜2500である。
The average degree of polymerization of polyvinyl alcohol, which is a raw material for producing the polyvinyl acetal resins (a) and (b), is preferably 500 to 3000. If the degree of polymerization is less than 500, the penetration resistance of the laminated glass is poor,
On the contrary, if it exceeds 3000, the strength is too high to be normally used as a safety glass. A more preferable degree of polymerization is 1000 to 2500.

【0017】アセタール基の炭素数が4〜6であるポリ
ビニルアセタール樹脂(a)を得るためには、炭素数4
〜6のアルデヒド、例えば、n─ブチルアルデヒド、イ
ソブチルアルデヒド、n−ヘキシルアルデヒド、バレル
アルデヒド、2─エチルブチルアルデヒド等が単独ある
いは適宜組み合わせて用いられ、好ましくは、n─ブチ
ルアルデヒド、イソブチルアルデヒド、n─ヘキシルア
ルデヒドである。炭素数が4未満のアルデヒドを用いた
場合は、十分な遮音性を得ることができず、逆に、炭素
数が6を超えたアルデヒドはアセタール化の反応性に著
しく乏しく、得られる中間膜は室温付近で十分な遮音性
を発揮しない。
In order to obtain the polyvinyl acetal resin (a) in which the acetal group has 4 to 6 carbon atoms, the number of carbon atoms is 4
~ 6 aldehydes, for example, n-butyraldehyde, isobutyraldehyde, n-hexylaldehyde, valeraldehyde, 2-ethylbutyraldehyde and the like are used alone or in appropriate combination, and preferably n-butyraldehyde, isobutyraldehyde, n — Hexylaldehyde. When an aldehyde having a carbon number of less than 4 is used, sufficient sound insulation cannot be obtained, and conversely, an aldehyde having a carbon number of more than 6 is extremely poor in the reactivity of acetalization, and the obtained interlayer film is Does not exhibit sufficient sound insulation near room temperature.

【0018】アセタール基の炭素数が3又は4であるポ
リビニルアセタール樹脂(b)を得るためには、炭素数
3又は4のアルデヒド、例えば、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
単独あるいは2種以上組み合わせて用いられる。
In order to obtain a polyvinyl acetal resin (b) having an acetal group having 3 or 4 carbon atoms, an aldehyde having 3 or 4 carbon atoms such as propionaldehyde, n-butyraldehyde, isobutyraldehyde, etc. may be used alone or Used in combination of two or more.

【0019】ポリビニルアセタール樹脂(a)におい
て、酸素原子を介してアセチル基が結合しているエチレ
ン基の量は8〜22モル%に限定される。その理由は、
この量が8モル%未満であると、得られる中間膜の遮音
性が十分に発揮されず、逆に、22モル%を超える場合
には、アルデヒドの反応性が著しく低下するとともに、
得られる中間膜の透明性が低下するからであり、より好
ましくは10〜19モル%である。
In the polyvinyl acetal resin (a), the amount of ethylene groups having acetyl groups bonded via oxygen atoms is limited to 8 to 22 mol%. The reason is,
If this amount is less than 8 mol%, the sound insulation of the resulting interlayer film is not sufficiently exhibited, and conversely, if it exceeds 22 mol%, the reactivity of the aldehyde is significantly reduced, and
This is because the transparency of the obtained intermediate film is lowered, and more preferably 10 to 19 mol%.

【0020】ポリビニルアセタール樹脂(b)の酸素原
子を介してアセチル基が結合しているエチレン基の量は
4モル%以下に限定される。その理由は、この量が4モ
ル%を超える場合には、耐候性が十分に発揮されないか
らであり、より好ましくは0〜2モル%である。
The amount of ethylene groups to which an acetyl group is bonded via an oxygen atom of the polyvinyl acetal resin (b) is limited to 4 mol% or less. The reason is that if this amount exceeds 4 mol%, the weather resistance is not sufficiently exhibited, and it is more preferably 0 to 2 mol%.

【0021】ポリビニルアセタール樹脂(a)のアセタ
ール化度は、40モル%以上であることが好ましい。ア
セタール化度が40モル%未満であると、可塑剤との相
溶性がよくなく、遮音性を発揮するのに必要な量の可塑
剤の添加が難しいからである。より好ましいアセタール
化度は50モル%以上である。
The degree of acetalization of the polyvinyl acetal resin (a) is preferably 40 mol% or more. This is because if the degree of acetalization is less than 40 mol%, the compatibility with the plasticizer is poor and it is difficult to add the plasticizer in an amount necessary for exhibiting sound insulation. A more preferable degree of acetalization is 50 mol% or more.

【0022】ポリビニルアセタール樹脂(b)のアセタ
ール化度は、50モル%以上であることが好ましい。ア
セタール化度が50モル%未満であると、可塑剤との相
溶性がよくなく、耐貫通性確保に必要な量の可塑剤の添
加が難しいからである。
The degree of acetalization of the polyvinyl acetal resin (b) is preferably 50 mol% or more. If the degree of acetalization is less than 50 mol%, the compatibility with the plasticizer is poor and it is difficult to add the plasticizer in an amount necessary to secure penetration resistance.

【0023】本発明において、ポリビニルアセタール樹
脂(a)及び(b)を得る方法としては、例えば、ポリ
ビニルアルコールを熱水に溶解し、得られたポリビニル
アルコール水溶液を所定温度に保持した後、これに上記
アルデヒドと触媒を加え、アセタール化反応を進行さ
せ、その後に、反応液を所定温度で高温保持した後に、
中和、水洗、乾燥の諸工程を経て樹脂粉末を得る方法が
ある。
In the present invention, as a method for obtaining the polyvinyl acetal resins (a) and (b), for example, polyvinyl alcohol is dissolved in hot water, the obtained aqueous solution of polyvinyl alcohol is kept at a predetermined temperature, and then this is added. The above aldehyde and catalyst are added to proceed the acetalization reaction, and after that, the reaction solution is kept at a high temperature at a predetermined temperature,
There is a method of obtaining a resin powder through various steps of neutralization, washing with water and drying.

【0024】ポリビニルアセタール樹脂(a)及び
(b)に添加される可塑剤としては、一塩基酸エステ
ル、多塩基酸エステル等の有機系可塑剤や、有機リン酸
系、有機亜リン酸系等のリン酸系可塑剤等が用いられ
る。
Examples of the plasticizer added to the polyvinyl acetal resins (a) and (b) include organic plasticizers such as monobasic acid esters and polybasic acid esters, organic phosphoric acid resins and organic phosphorous acid resins. Phosphoric acid plasticizers and the like are used.

【0025】一塩基酸エステルの中では、例えば、トリ
エチレングリコールと、酪酸、イソ酪酸、カプロン酸、
2─エチル酪酸、ヘプタン酸、n─オクチル酸、2─エ
チルヘキシル酸、ペラルゴン酸(n─ノニル酸)、デシ
ル酸等の有機酸との反応によって得られたグリコール系
エステルが好ましい。その他、テトラエチレングリコー
ル、トリプロピレングリコールと上記の如き有機酸との
エステルも用いられる。
Among the monobasic acid esters, for example, triethylene glycol, butyric acid, isobutyric acid, caproic acid,
A glycol ester obtained by reaction with an organic acid such as 2-ethylbutyric acid, heptanoic acid, n-octylic acid, 2-ethylhexylic acid, pelargonic acid (n-nonyl acid), and decylic acid is preferable. In addition, esters of tetraethylene glycol and tripropylene glycol with the above organic acids are also used.

【0026】多塩基酸エステルとしては、例えば、アジ
ピン酸、セバチン酸、アゼライン酸等の有機酸と炭素数
4〜8の直鎖状又は分枝状アルコールとのエステルが好
ましい。
The polybasic acid ester is preferably, for example, an ester of an organic acid such as adipic acid, sebacic acid, azelaic acid and a linear or branched alcohol having 4 to 8 carbon atoms.

【0027】又、リン酸系可塑剤としては、トリブトキ
シエチルフォスフェート、イソデシルフェニルホスフェ
ート、トリイソプロピルホスファイト等が好ましい。
As the phosphoric acid type plasticizer, tributoxyethyl phosphate, isodecyl phenyl phosphate, triisopropyl phosphite and the like are preferable.

【0028】より好適な例としては、一塩基酸エステル
では、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─ジカプロネート、トリエ
チレングリコール─ジ─n−オクトエート等が挙げら
れ、二塩基酸エステルとしては、ジブチルセバケート、
ジオクチルアゼレート、ジブチルカルビトールアジペー
ト等が挙げられる。
More preferred examples of the monobasic acid ester include triethylene glycol di-2-ethyl butyrate, triethylene glycol di-2 ethylhexoate, triethylene glycol dicaproate and triethylene glycol diester. —N-octoate and the like, dibasic acid ester, dibutyl sebacate,
Examples thereof include dioctyl azelate and dibutyl carbitol adipate.

【0029】ポリビニルアセタール樹脂(a)に添加さ
れる可塑剤の添加量は、ポリビニルアセタール樹脂
(a)100重量部に対して35〜65重量部であるこ
とが好ましい。添加量が35重量部未満であると、遮音
性が十分に得られず、逆に、65重量部を超えても遮音
性が十分得られないことがあるからである。より好まし
い添加量は45〜55重量部である。
The amount of the plasticizer added to the polyvinyl acetal resin (a) is preferably 35 to 65 parts by weight with respect to 100 parts by weight of the polyvinyl acetal resin (a). This is because if the addition amount is less than 35 parts by weight, sufficient sound insulation cannot be obtained, and conversely, if it exceeds 65 parts by weight, sufficient sound insulation may not be obtained. The more preferable addition amount is 45 to 55 parts by weight.

【0030】ポリビニルアセタール樹脂(b)に添加さ
れる可塑剤の添加量は、ポリビニルアセタール樹脂
(b)100重量部に対して25〜55重量部であるこ
とが好ましい。添加量が25重量部未満であると、耐貫
通性が低下し、逆に、55重量部を超えると、可塑剤が
ブリードアウトして、合わせガラスの透明性やガラス板
との接着性を損なうことがある。より好ましい添加量は
30〜45重量部である。
The amount of the plasticizer added to the polyvinyl acetal resin (b) is preferably 25 to 55 parts by weight with respect to 100 parts by weight of the polyvinyl acetal resin (b). If the amount added is less than 25 parts by weight, the penetration resistance will decrease, and conversely, if it exceeds 55 parts by weight, the plasticizer will bleed out, impairing the transparency of the laminated glass and the adhesion to the glass plate. Sometimes. A more preferable addition amount is 30 to 45 parts by weight.

【0031】本発明の中間膜を構成する積層膜の層
(A)と層(B)の積層構成は、特に限定されないが、
下記のものが例示される。 層(A)/層(B)の2層積層構成。 層(B)/層(A)/層(B)又は層(A)/層
(B)/層(A)の3層積層構成。 層(A)/層(B)/層(A)/層(B)の4層積
層構成。 3層以上の積層膜では、積層構成は、層(A)/層
(B)/層(B)のような非対称の構成であってもよ
い。
The laminated structure of the layer (A) and the layer (B) of the laminated film constituting the intermediate film of the present invention is not particularly limited,
The following are exemplified. Two-layer laminated structure of layer (A) / layer (B). Three-layer laminated structure of layer (B) / layer (A) / layer (B) or layer (A) / layer (B) / layer (A). Four-layer laminated structure of layer (A) / layer (B) / layer (A) / layer (B). In a laminated film having three or more layers, the laminated structure may be an asymmetrical structure such as layer (A) / layer (B) / layer (B).

【0032】このうち、特に好ましい積層構成は層
(B)/層(A)/層(B)である。層(B)/層
(A)/層(B)の積層構成が好ましい理由は、層
(A)と層(B)との動的粘弾性の相対的な関係からく
る。又、もう1つの理由は、この積層構成の採用によ
り、膜の合わせ加工法においてポリビニルブチラール系
中間膜の場合に匹敵する良好な作業性が得られるからで
ある。
Of these, a particularly preferred laminated structure is layer (B) / layer (A) / layer (B). The reason why the laminated structure of layer (B) / layer (A) / layer (B) is preferable is due to the relative relationship of dynamic viscoelasticity between layer (A) and layer (B). Another reason is that by adopting this laminated structure, good workability comparable to that of the polyvinyl butyral type intermediate film can be obtained in the film processing method.

【0033】中間膜全体の厚さは、通常の合わせガラス
用中間膜としての厚みである0.3〜1.6mmが好ま
しい。この厚さは厚い方がより遮音性に優れることにな
るが、合わせガラスとして最小限必要な耐貫通性の点を
考慮すると、実用上は前記の範囲が好適である。
The total thickness of the interlayer film is preferably 0.3 to 1.6 mm, which is the thickness of a normal interlayer film for laminated glass. The thicker the thickness, the more excellent the sound insulating property is, but in consideration of the minimum penetration resistance required for the laminated glass, the above range is practically preferable.

【0034】上記層(A)の厚みは、中間膜全体の厚み
の9〜25%であり、且つ、0.05mm以上である必
要がある。層(A)の厚みが中間膜全体の厚みの9%未
満であると、遮音性の十分な効果が得られず、逆に、2
5%を超えると、光学歪みが大きくなるとともに、衝撃
エネルギー吸収性等の合わせガラスに必要な基本性能を
損なうからである。又、層(A)の厚みが0.05mm
未満では、遮音性の十分な効果が得られない。
The thickness of the layer (A) should be 9 to 25% of the total thickness of the intermediate film, and should be 0.05 mm or more. If the thickness of the layer (A) is less than 9% of the total thickness of the interlayer film, a sufficient effect of sound insulation cannot be obtained, and conversely 2
This is because if it exceeds 5%, the optical distortion becomes large and the basic performance required for the laminated glass such as impact energy absorption is impaired. Moreover, the thickness of the layer (A) is 0.05 mm.
If it is less than the above, a sufficient effect of sound insulation cannot be obtained.

【0035】層(B)が複数層である場合、その合計の
厚みは、0.2mm以上が好ましい。その理由は、0.
2mm未満であると、耐貫通性の低下が著しくなる傾向
があるからである。
When the layer (B) has a plurality of layers, the total thickness thereof is preferably 0.2 mm or more. The reason is 0.
If it is less than 2 mm, the penetration resistance tends to be significantly reduced.

【0036】中間膜の製膜方法としては、例えば、層
(A)及び層(B)を形成する膜をそれぞれ別々に製膜
する方法、層(A)及び層(B)を多層成形機を用いて
一体成形させる方法等種々の方法が採用される。
As the method of forming the intermediate film, for example, a method of separately forming the films forming the layer (A) and the layer (B), and a multilayer molding machine for forming the layer (A) and the layer (B) are used. Various methods such as a method of integrally molding by using are adopted.

【0037】本発明の中間膜をガラス板間に介在させる
ようにしてサンドイッチして合わせガラスを製造するに
は、通常の合わせガラスの製造に用いられる方法が採用
され、例えば、両側からガラス板で挟み込み、熱圧プレ
スにより合わせガラスを製造する方法等が採用される。
In order to produce a laminated glass by sandwiching the interlayer film of the present invention between the glass plates, a method generally used for producing a laminated glass is adopted. A method of producing laminated glass by sandwiching and hot pressing is adopted.

【0038】[0038]

【作用】本発明の合わせガラス用中間膜は、アセタール
基の炭素数が4〜6であり、且つ、酸素原子を介してア
セチル基が結合しているエチレン基の、主鎖の全エチレ
ン基に対するモル分率が8〜22モル%であるポリビニ
ルアセタール樹脂(a)と可塑剤とからなる少なくとも
一つの層(A)と、アセタール基の炭素数が3又は4で
あり、且つ、酸素原子を介してアセチル基が結合してい
るエチレン基の主鎖の全エチレン基に対するモル分率が
4モル%以下であるポリビニルアセタール樹脂(b)と
可塑剤とからなる少なくとももう一つの層(B)との積
層膜であって、その積層膜を構成する層のうち、層
(A)の厚みが、中間膜全体の厚みの9〜25%で、且
つ、0.05mm以上であることにより、層(A)によ
り音エネルギーが効果的に熱エネルギーに吸収され、特
に2000Hz付近の中高温域におけるコインシデンス
効果による遮音性の低下が効果的に防止されるととも
に、多層膜の問題点の1つである光学歪みが大幅に改善
され、且つ、層(B)により透明性、耐候性、衝撃エネ
ルギー吸収性、樹脂層界面での接着性、ガラス板との接
着性等の合わせガラスに必要な基本性能や、合わせ加工
性が保持される。
The interlayer film for laminated glass of the present invention has 4 to 6 carbon atoms in the acetal group, and the ethylene group to which the acetyl group is bonded via an oxygen atom is based on all ethylene groups in the main chain. At least one layer (A) composed of a polyvinyl acetal resin (a) having a mole fraction of 8 to 22 mol% and a plasticizer, an acetal group having 3 or 4 carbon atoms, and an oxygen atom. A polyvinyl acetal resin (b) having a mole fraction of 4 mol% or less of the main chain of ethylene groups having acetyl groups bonded to all ethylene groups, and at least another layer (B) comprising a plasticizer Of the layers constituting the laminated film, the thickness of the layer (A) is 9 to 25% of the total thickness of the intermediate film, and is 0.05 mm or more. ) Makes sound energy more effective Is absorbed by heat energy, and in particular, the decrease in sound insulation due to the coincidence effect in the middle and high temperature range around 2000 Hz is effectively prevented, and the optical distortion, which is one of the problems of the multilayer film, is significantly improved, and The layer (B) retains the basic performance required for laminated glass, such as transparency, weather resistance, impact energy absorption, adhesiveness at the resin layer interface, and adhesiveness with a glass plate, and laminating processability.

【0039】[0039]

【実施例】以下、本発明を実施例により説明する。実施例1 (1)ポリビニルブチラール樹脂(a)の調製及び製膜 純水2890gに、重合度1700、鹸化度88.1モ
ル%のポリビニルアルコール191gを加えて加熱溶解
した。反応系を12℃に温度調節し、35重量%塩酸2
01gとブチルアルデヒド130gを加えて、ポリビニ
ルブチラール樹脂を析出させた。その後、反応系を温度
50℃で5時間保持し、反応を終了させた。過剰の水で
の洗浄により、未反応アルデヒドを洗い流し、塩酸触媒
を中和し、塩を除去した後、乾燥を経て、ポリビニルブ
チラール樹脂(a)を得た。
EXAMPLES The present invention will be described below with reference to examples. Example 1 (1) Preparation of polyvinyl butyral resin (a) and film formation To 2890 g of pure water, 191 g of polyvinyl alcohol having a polymerization degree of 1700 and a saponification degree of 88.1 mol% was added and dissolved by heating. The temperature of the reaction system was adjusted to 12 ° C., and 35 wt% hydrochloric acid 2
The polyvinyl butyral resin was deposited by adding 01 g and 130 g of butyraldehyde. Then, the reaction system was kept at a temperature of 50 ° C. for 5 hours to complete the reaction. Unreacted aldehyde was washed away by washing with excess water, the hydrochloric acid catalyst was neutralized, salts were removed, and drying was performed to obtain polyvinyl butyral resin (a).

【0040】このポリビニルブチラール樹脂(a)のア
セタール化度(プロトンNMR法により測定)は、6
0.2モル%であった。又、このポリビニルブチラール
樹脂(a)のアセチル基量は11.9モル%であった。
The degree of acetalization of this polyvinyl butyral resin (a) (measured by the proton NMR method) is 6
It was 0.2 mol%. The amount of acetyl groups in this polyvinyl butyral resin (a) was 11.9 mol%.

【0041】得られたポリビニルブチラール樹脂(a)
を50g採取し、これに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25gと、酸化防止
剤としてテトラキス〔メチレン─3─(3′,5′─ブ
チル─4′─ヒドロキシフェニル)プロピオネート〕メ
タン0.15gを加え、この混合物をミキシングロール
で十分に混練し、混練物の所定量をプレス成形機で15
0℃で30分間保持した。こうして厚み0.08mmの
層(A)を製膜した。
The obtained polyvinyl butyral resin (a)
(50 g) was collected and 25 g of triethylene glycol di-2-ethylbutyrate as a plasticizer and tetrakis [methylene-3- (3 ', 5'-butyl-4'-hydroxyphenyl) propionate as an antioxidant were collected. ] 0.15 g of methane was added, and this mixture was sufficiently kneaded with a mixing roll, and a predetermined amount of the kneaded product was fed with a press molding machine to obtain 15
Hold at 0 ° C for 30 minutes. Thus, a layer (A) having a thickness of 0.08 mm was formed.

【0042】(2)ポリビニルアセタール樹脂(b)の
調製及び製膜 純水2910gに、重合度1700、鹸化度99.1モ
ル%のポリビニルアルコール190gを加えて加熱溶解
した。反応系を12℃に温度調節し、35重量%塩酸2
01gとブチルアルデヒド124gを加えて、ポリビニ
ルブチラール樹脂を析出させた。その後、反応系を温度
50℃で4時間保持し、反応を終了させた。過剰の水で
の洗浄により、未反応アルデヒドを洗い流し、塩酸触媒
を中和し、塩を除去した後、乾燥を経て、ポリビニルブ
チラール樹脂(b)を得た。
(2) Preparation of polyvinyl acetal resin (b) and film formation To 2910 g of pure water, 190 g of polyvinyl alcohol having a degree of polymerization of 1700 and a degree of saponification of 99.1 mol% was added and dissolved by heating. The temperature of the reaction system was adjusted to 12 ° C., and 35 wt% hydrochloric acid 2
The polyvinyl butyral resin was deposited by adding 01 g and 124 g of butyraldehyde. Then, the reaction system was maintained at a temperature of 50 ° C. for 4 hours to complete the reaction. Unreacted aldehyde was washed away by washing with excess water, the hydrochloric acid catalyst was neutralized, salts were removed, and drying was carried out to obtain polyvinyl butyral resin (b).

【0043】このポリビニルブチラール樹脂(b)のア
セタール化度(プロトンNMR法により測定)は、6
6.3モル%であった。又、このポリビニルブチラール
樹脂(b)のアセチル基量は0.9モル%であった。
The degree of acetalization of this polyvinyl butyral resin (b) (measured by the proton NMR method) is 6
It was 6.3 mol%. The amount of acetyl groups in this polyvinyl butyral resin (b) was 0.9 mol%.

【0044】得られたポリビニルブチラール樹脂(b)
を50g採取し、これに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20gと、紫外線吸
収剤として2─(2′─ヒドロキシ─5′─メチルフェ
ニル)ベンゾトリアゾール0.1gを加え、この混合物
をミキシングロールで十分に混練し、混練物の所定量を
プレス成形機で150℃で30分間保持した。こうして
厚み0.15mmの層(B)を製膜した。 (3)合わせガラスの作製 層(A)1枚と層(B)2枚とを、積層構成が層(B)
/層(A)/層(B)になるように重ね、これを一辺3
0cmの正方形の厚み3mmの2枚のフロートガラスで
両側からサンドイッチ状に挟み、これをゴムバッグに入
れ、20torrの真空度で20分間脱気した後、脱気
状態のまま90℃のオーブンに移し、この温度を30分
間保持した。ついで、オートクレーブ中で圧力12kg
/cm2、温度135℃で熱圧着処理し、中間膜が層
(B)/層(A)/層(B)(層厚比:0.15/0.
08/0.15)の構成の透明な合わせガラスを得た。
The obtained polyvinyl butyral resin (b)
(50 g) of triethylene glycol-di-2-ethylbutyrate as a plasticizer and 0.1 g of 2- (2'-hydroxy-5'-methylphenyl) benzotriazole as an ultraviolet absorber are added to This mixture was thoroughly kneaded with a mixing roll, and a predetermined amount of the kneaded product was held at 150 ° C. for 30 minutes with a press molding machine. Thus, a layer (B) having a thickness of 0.15 mm was formed. (3) Preparation of laminated glass One layer (A) and two layers (B) are laminated to form a layer (B)
/ Layer (A) / layer (B) so that it is 3
Sandwich it from both sides with two 0 cm square 3 mm thick float glass, put it in a rubber bag, degas for 20 minutes at a vacuum degree of 20 torr, and then transfer it to an oven at 90 ° C in a degassed state. This temperature was maintained for 30 minutes. Then, the pressure is 12kg in the autoclave.
/ Cm 2 at a temperature of 135 ° C., and the interlayer film is a layer (B) / layer (A) / layer (B) (layer thickness ratio: 0.15 / 0.
A transparent laminated glass having a constitution of 08 / 0.15) was obtained.

【0045】実施例2 層(A)の厚みを0.05mmとし、層(B)の厚みを
0.17mmとしたこと以外は実施例1と同様にして、
中間膜が層(B)/層(A)/層(B)(層厚比:0.
17/0.05/0.17)の構成の透明な合わせガラ
スを得た。
Example 2 The procedure of Example 1 was repeated except that the layer (A) had a thickness of 0.05 mm and the layer (B) had a thickness of 0.17 mm.
The interlayer film is a layer (B) / layer (A) / layer (B) (layer thickness ratio: 0.
A transparent laminated glass having a constitution of 17 / 0.05 / 0.17) was obtained.

【0046】実施例3 層(A)の厚みを0.04mmとし、層(B)の厚みを
0.1mmとし、5層構成としたこと以外は実施例1と
同様にして、中間膜が層(B)/層(A)/層(B)/
層(A)/層(B)(層厚比:0.1/0.04/0.
1/0.04/0.1)の構成の透明な合わせガラスを
得た。
Example 3 The interlayer film was formed in the same manner as in Example 1 except that the layer (A) had a thickness of 0.04 mm, the layer (B) had a thickness of 0.1 mm, and had a five-layer structure. (B) / layer (A) / layer (B) /
Layer (A) / Layer (B) (Layer thickness ratio: 0.1 / 0.04 / 0.
A transparent laminated glass having a constitution of 1 / 0.04 / 0.1) was obtained.

【0047】比較例1 層(A)の厚みを0.2mmとし、層(B)の厚みを
0.1mmとしたこと以外は実施例1と同様にして、中
間膜が層(B)/層(A)/層(B)(層厚比:0.1
/0.2/0.1)の構成の透明な合わせガラスを得
た。
Comparative Example 1 The interlayer film was the layer (B) / layer in the same manner as in Example 1 except that the thickness of the layer (A) was 0.2 mm and the thickness of the layer (B) was 0.1 mm. (A) / layer (B) (layer thickness ratio: 0.1
A transparent laminated glass having a structure of /0.2/0.1) was obtained.

【0048】比較例2 層(A)の厚みを0.13mmとし、層(B)の厚みを
0.13mmとしたこと以外は実施例1と同様にして、
中間膜が層(B)/層(A)/層(B)(層厚比:0.
13/0.13/0.13)の構成の透明な合わせガラ
スを得た。
Comparative Example 2 The procedure of Example 1 was repeated except that the layer (A) had a thickness of 0.13 mm and the layer (B) had a thickness of 0.13 mm.
The interlayer film is a layer (B) / layer (A) / layer (B) (layer thickness ratio: 0.
13 / 0.13 / 0.13) was obtained.

【0049】比較例3 層(A)の厚みを0.1mmとし、層(B)の厚みを
0.06mmとしたこと以外は実施例3と同様にして、
中間膜が層(B)/層(A)/層(B)/層(A)/層
(B)(層厚比:0.06/0.1/0.06/0.1
/0.06)の構成の透明な合わせガラスを得た。
Comparative Example 3 The procedure of Example 3 was repeated except that the layer (A) had a thickness of 0.1 mm and the layer (B) had a thickness of 0.06 mm.
The intermediate film is layer (B) / layer (A) / layer (B) / layer (A) / layer (B) (layer thickness ratio: 0.06 / 0.1 / 0.06 / 0.1).
A transparent laminated glass having a structure of /0.06) was obtained.

【0050】実施例1〜3及び比較例1〜3により得ら
れた合わせガラスの遮音性及び光学歪みを測定した。そ
の結果を表1に示す。尚、合わせガラスの遮音性及び光
学歪みの測定は次のようにして行った。遮音性の測定方法 試料の合わせガラスを、通常用いられているダンピング
試験装置にて加振し、そこから得られる損失係数と、試
料とガラスとの共振周波数の比から、透過損失を算出し
た。測定温度を20℃とした。光学歪み 試料の合わせガラスに、ハロゲンランプにてスリットを
透過させた光源を当て、スクリーンに写った投影歪みを
センサー(カメラ)にて受動し、パソコンにてデータ処
理を行い、光学歪み値とした。
The sound insulation and optical distortion of the laminated glass obtained in Examples 1 to 3 and Comparative Examples 1 to 3 were measured. The results are shown in Table 1. The sound insulation and optical distortion of the laminated glass were measured as follows. Sound insulation measurement method The laminated glass of the sample was vibrated by a commonly used damping test device, and the transmission loss was calculated from the loss coefficient obtained from it and the ratio of the resonance frequency of the sample and the glass. The measurement temperature was 20 ° C. Optical distortion A laminated glass of a sample was irradiated with a light source that passed through a slit with a halogen lamp, the projection distortion reflected on the screen was passively passed through a sensor (camera), and data processing was performed on a personal computer to obtain the optical distortion value. .

【0051】[0051]

【表1】 [Table 1]

【0052】表1からも明らかな如く、本発明の実施例
1〜3の場合には、いずれも、遮音性が優れ、且つ、光
学歪みが改善されているのに対して、比較例1〜3の場
合には、光学歪みが大きい。
As is clear from Table 1, in the cases of Examples 1 to 3 of the present invention, in all cases, the sound insulation was excellent and the optical distortion was improved, while Comparative Examples 1 to 1 In the case of 3, the optical distortion is large.

【0053】[0053]

【発明の効果】本発明の合わせガラス用中間膜は、上記
の如き構成とされているので、透明性、耐候性、衝撃エ
ネルギー吸収性、樹脂層界面での接着性、ガラス板との
接着性等の合わせガラスに必要な基本性能や、合わせ加
工性が保持され、遮音性に優れ、且つ、光学歪みが少な
い。
EFFECT OF THE INVENTION Since the interlayer film for laminated glass of the present invention has the above-mentioned constitution, it has transparency, weather resistance, impact energy absorption, adhesiveness at the resin layer interface, and adhesiveness with a glass plate. The basic performance required for laminated glass, such as for example, and the workability of laminating are maintained, the sound insulation is excellent, and the optical distortion is small.

【0054】[0054]

【図面の簡単な説明】[Brief description of drawings]

【図1】コインシデンス効果によって生ずる透過損失量
の極小値(TL値)を示す説明図である。
FIG. 1 is an explanatory diagram showing a minimum value (TL value) of a transmission loss amount caused by a coincidence effect.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 アセタール基の炭素数が4〜6であり、
且つ、酸素原子を介してアセチル基が結合しているエチ
レン基の、主鎖の全エチレン基に対するモル分率が8〜
22モル%であるポリビニルアセタール樹脂(a)と可
塑剤とからなる少なくとも一つの層(A)と、アセター
ル基の炭素数が3又は4であり、且つ、酸素原子を介し
てアセチル基が結合しているエチレン基の主鎖の全エチ
レン基に対するモル分率が4モル%以下であるポリビニ
ルアセタール樹脂(b)と可塑剤とからなる少なくとも
もう一つの層(B)との積層膜であって、その積層膜を
構成する層のうち、層(A)の厚みが、中間膜全体の厚
みの9〜25%で、且つ、0.05mm以上であること
を特徴とする合わせガラス用中間膜。
1. An acetal group having 4 to 6 carbon atoms,
Moreover, the mole fraction of the ethylene group in which the acetyl group is bonded through the oxygen atom to the total ethylene group of the main chain is 8 to
22 mol% of at least one layer (A) comprising a polyvinyl acetal resin (a) and a plasticizer, an acetal group having 3 or 4 carbon atoms, and an acetyl group bonded through an oxygen atom. A laminated film of a polyvinyl acetal resin (b) having a mole fraction of 4% by mole or less with respect to all ethylene groups in the main chain of ethylene groups, and at least another layer (B) comprising a plasticizer, Among the layers constituting the laminated film, the thickness of the layer (A) is 9 to 25% of the thickness of the entire intermediate film, and is 0.05 mm or more.
JP24114393A 1993-09-28 1993-09-28 Interlayer for laminated glass Expired - Lifetime JP3335436B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24114393A JP3335436B2 (en) 1993-09-28 1993-09-28 Interlayer for laminated glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24114393A JP3335436B2 (en) 1993-09-28 1993-09-28 Interlayer for laminated glass

Publications (2)

Publication Number Publication Date
JPH0797240A true JPH0797240A (en) 1995-04-11
JP3335436B2 JP3335436B2 (en) 2002-10-15

Family

ID=17069916

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3335436B2 (en)

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JP2002128545A (en) * 2000-10-18 2002-05-09 Sekisui Chem Co Ltd Intermediate film for laminated glass and laminated glass
US6887577B1 (en) 1999-08-16 2005-05-03 Ht Troplast Ag Compound safety glass and PVB foil for the production thereof
WO2006038332A1 (en) * 2004-10-01 2006-04-13 Sekisui Chemical Co., Ltd. Thermoplastic resin sheet and layered product
JP2006264289A (en) * 2004-10-01 2006-10-05 Sekisui Chem Co Ltd Thermoplastic resin sheet and laminate
US7510771B2 (en) 2005-03-17 2009-03-31 Solutia Incorporated Sound reducing polymer interlayers
JP2010525967A (en) * 2007-04-30 2010-07-29 ソリユテイア・インコーポレイテツド Impact resistant polymer interlayer
US7842395B2 (en) 2006-11-01 2010-11-30 Solutia Inc. Multiple layer interlayers having a gradient region
US7846532B2 (en) 2005-03-17 2010-12-07 Solutia Incorporated Sound reducing wedge shaped polymer interlayers
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CN107215052A (en) * 2016-03-22 2017-09-29 Skc株式会社 Multilaminar polyethylene acetal film and the laminated glass including it
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US6887577B1 (en) 1999-08-16 2005-05-03 Ht Troplast Ag Compound safety glass and PVB foil for the production thereof
JP2002128545A (en) * 2000-10-18 2002-05-09 Sekisui Chem Co Ltd Intermediate film for laminated glass and laminated glass
EP2574456A1 (en) * 2004-10-01 2013-04-03 Sekisui Chemical Co., Ltd. Termoplastic resin sheet and laminate
WO2006038332A1 (en) * 2004-10-01 2006-04-13 Sekisui Chemical Co., Ltd. Thermoplastic resin sheet and layered product
JP2006264289A (en) * 2004-10-01 2006-10-05 Sekisui Chem Co Ltd Thermoplastic resin sheet and laminate
US7563516B2 (en) * 2004-10-01 2009-07-21 Sekisui Chemical Co., Ltd. Thermoplastic resin sheet and laminate
JP2010201932A (en) * 2004-10-01 2010-09-16 Sekisui Chem Co Ltd Thermoplastic resin sheet and laminate
US7510771B2 (en) 2005-03-17 2009-03-31 Solutia Incorporated Sound reducing polymer interlayers
US7846532B2 (en) 2005-03-17 2010-12-07 Solutia Incorporated Sound reducing wedge shaped polymer interlayers
US8574706B2 (en) 2005-03-17 2013-11-05 Solutia Inc. Sound reducing wedge shaped polymer interlayers
US7842395B2 (en) 2006-11-01 2010-11-30 Solutia Inc. Multiple layer interlayers having a gradient region
JP2010525967A (en) * 2007-04-30 2010-07-29 ソリユテイア・インコーポレイテツド Impact resistant polymer interlayer
US20140199534A1 (en) * 2011-02-10 2014-07-17 Sekisui Chemical Co., Ltd. Laminated glass intermediate film and laminated glass
CN103459345A (en) * 2011-02-10 2013-12-18 积水化学工业株式会社 Laminated glass intermediate film and laminated glass
US10688758B2 (en) 2011-02-10 2020-06-23 Sekisui Chemical Co., Ltd. Laminated glass intermediate film and laminated glass
JP2013023434A (en) * 2011-07-22 2013-02-04 Kuraray Europe Gmbh Thin film laminate with damping characteristic containing sub-layer of polyvinyl(iso)acetal containing plasticizer
CN102886952A (en) * 2011-07-22 2013-01-23 可乐丽欧洲有限责任公司 Film laminates with damping properties containing a sub-layer of polyvinyl(iso)acetal containing plasticizers
CN102886952B (en) * 2011-07-22 2016-11-30 可乐丽欧洲有限责任公司 Comprise the film laminates with damping capacity of the sublayer being made up of polyvinyl alcohol contracting (different) aldehyde of plasticizer-containing
CN107215052A (en) * 2016-03-22 2017-09-29 Skc株式会社 Multilaminar polyethylene acetal film and the laminated glass including it
CN107215052B (en) * 2016-03-22 2020-08-18 Skc株式会社 Multilayer polyvinyl acetal film and laminated glass including the same
CN114072365A (en) * 2019-07-02 2022-02-18 积水化学工业株式会社 Interlayer film for laminated glass and laminated glass
CN114072365B (en) * 2019-07-02 2023-09-26 积水化学工业株式会社 Interlayer film for laminated glass and laminated glass
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