JP2000290046A - Intermediate film for sandwich glass and its production - Google Patents
Intermediate film for sandwich glass and its productionInfo
- Publication number
- JP2000290046A JP2000290046A JP11102796A JP10279699A JP2000290046A JP 2000290046 A JP2000290046 A JP 2000290046A JP 11102796 A JP11102796 A JP 11102796A JP 10279699 A JP10279699 A JP 10279699A JP 2000290046 A JP2000290046 A JP 2000290046A
- Authority
- JP
- Japan
- Prior art keywords
- laminated glass
- glass
- interlayer film
- thermoplastic resin
- resin sheet
- 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
Links
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
- B32B17/1055—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
- B32B17/10577—Surface roughness
- B32B17/10587—Surface roughness created by embossing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/406—Bright, glossy, shiny surface
Landscapes
- Laminated Bodies (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、合わせガラス用中
間膜及びその製造方法に関する。[0001] The present invention relates to an interlayer film for laminated glass and a method for producing the same.
【０００２】[0002]
【従来の技術】２枚のガラス板の間に可塑化ポリビニル
ブチラール等の熱可塑性樹脂シートからなる合わせガラ
ス用中間膜を挟着して得られる合わせガラスは、強度が
大きく破損し難いという優れた特徴を有し、破損した場
合でも破片が飛散しない安全ガラス材である。このた
め、自動車等の車両、航空機、建築物の窓ガラス等に広
く使用されている。2. Description of the Related Art A laminated glass obtained by sandwiching an interlayer film for a laminated glass made of a thermoplastic resin sheet such as plasticized polyvinyl butyral between two glass plates has an excellent feature that it has high strength and is hardly damaged. It is a safety glass material that does not scatter fragments even if broken. For this reason, it is widely used for vehicles such as automobiles, aircraft, window glasses of buildings, and the like.
【０００３】この合わせガラスは、２枚のガラス板の間
に上記熱可塑性樹脂シートからなる合わせガラス用中間
膜を挟着して積層し、予備圧着工程において各層間に残
存する空気を排除した後、熱圧着して製造される。[0003] This laminated glass is laminated by sandwiching an interlayer for laminated glass made of the above-mentioned thermoplastic resin sheet between two glass plates, and excluding air remaining between the layers in a pre-compression bonding step. It is manufactured by crimping.
【０００４】上記合わせガラスに用いられる中間膜は、
保管時に中間膜同士のブロッキングが生じないこと、ガ
ラスと中間膜とを重ね合わせる際の作業性が良好である
ことに加えて、製造工程の一つとして特に設けられてい
る予備圧着工程における脱気性が良好であること等が要
求される。特に予備圧着時における脱気性は合わせガラ
スの品質を左右し、脱気が不十分であると得られた合わ
せガラスの透明性が悪くなったり、加熱によって後から
気泡が生じたりするだけでなく、合わせガラスの接着力
を低下させることがある。[0004] The interlayer used for the above laminated glass is
In addition to the fact that the interlayers do not block each other during storage, the workability when laminating the glass and the interlayer is good, and the deaeration in the pre-compression bonding step that is particularly provided as one of the manufacturing steps Is required to be good. In particular, the deaeration at the time of pre-pressing affects the quality of the laminated glass, and if the deaeration is insufficient, the transparency of the obtained laminated glass deteriorates, or bubbles are generated later by heating, The adhesive strength of the laminated glass may be reduced.
【０００５】上記脱気性を含む中間膜の総合性能は、素
材である熱可塑性樹脂の種類や粘弾性等の物性によって
多くが定まるが、上記脱気性は、中間膜の表面形状によ
って大きくその品質を左右されるものである。従来より
ランダムな大きさや形状の多数の微細な凹凸や格子状の
微細な条溝を中間膜の表面に付与したり、特に粗さの異
なるエンボスを混在させて付与したりすることにより、
保管時における中間膜同士のブロッキングを防止し、予
備圧着工程における脱気性を良好にするという点で或る
程度の効果を挙げてきた（例えば、特公平１−３２７７
６号公報、特開平７−１８７７２８号公報等）。[0005] The overall performance of the interlayer including degassing properties is largely determined by the properties of the thermoplastic resin as the material and the viscoelasticity, etc. The degassing properties are greatly affected by the surface shape of the interlayer. It depends. By applying a large number of fine irregularities or lattice-shaped fine grooves with a random size or shape to the surface of the intermediate film, or by embossing with different roughness especially by mixing them,
A certain effect has been obtained in that blocking between interlayer films during storage is prevented and degassing in the pre-compression bonding step is improved (for example, Japanese Patent Publication No. 1-3277).
No. 6, JP-A-7-187728, etc.).
【０００６】しかし、近年においては、例えば、乗用車
のフロントグラスやリヤウインドウのように縁端部に大
きな曲率半径を持つ３次元曲面が加わった難形成性の合
わせガラスや建築用ガラスのように積層面積が広大であ
る合わせガラス等の需要が増大しており、ガラスペア差
の大きいガラスペアを用いたり、生産性向上に伴う工程
の線速アップ等によって、従来の中間膜では、ガラスと
中間膜の界面に気泡が残ったり、不透明になったりする
等、脱気性が必ずしも満足できるものではなくなってき
た。However, in recent years, for example, laminated glass such as hard-to-form laminated glass or architectural glass having a three-dimensional curved surface having a large radius of curvature added to the edge, such as a windshield or a rear window of a passenger car. Demand for laminated glass with a large area is increasing, and the glass and interlayer film in the conventional interlayer film have been increased due to the use of glass pairs with a large difference in glass pair and the increase in the linear speed of the process accompanying the improvement in productivity. The deaeration is not always satisfactory, for example, bubbles remain at the interface of the particles or become opaque.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、上述の問題
点を解決するためになされたものであって、その目的
は、保管中の中間膜同士のブロッキング防止性及びガラ
ス板と中間膜とを重ね合わせる際の作業性が良好であ
り、更には、ガラスと中間膜との各層間に残存する空気
を排除する予備圧着工程を設けることなく、２枚のガラ
ス板間に挟着した中間膜を直接圧着して優れた合わせガ
ラスとなし得る合わせガラス用中間膜を提供することに
ある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to prevent blocking between interlayer films during storage and to prevent a glass plate and an interlayer film from interposing. The workability at the time of laminating is good, and furthermore, the intermediate film sandwiched between two glass plates without providing a preliminary pressure bonding step for eliminating air remaining between each layer of the glass and the intermediate film Is to provide an interlayer film for laminated glass that can be directly pressed into an excellent laminated glass.
【０００８】本発明者は、大きな曲率半径を持つ３次元
曲面が加わった難形成性の合わせガラスや建築用ガラス
のように積層面積が広大である合わせガラスに用いられ
る中間膜の積層時における脱気性について鋭意研究し、
従来用いられてきたエンボスでは、どうしても脱気性を
計量化し、制御することができないものであり、表面粗
さ計等の機械的測定法では検出精度に限界（２μｍ程
度）があって、エンボスの凹部に残留した空気が脱気性
を悪くしていること、ＪＩＳ Ｚ ８７４１に準拠して
測定されるエンボス面の光沢度が、上記保管時の中間膜
同士のブロッキング性及び積層時の脱気性に強い相関を
有し、且つ、高い検出精度を有することを見いだし本発
明を完成したのである。The inventor of the present invention has proposed a method for removing an interlayer film used for laminating glass having a large laminating area such as hard-to-form laminated glass or architectural glass having a three-dimensional curved surface having a large radius of curvature. I study diligently about temper,
In conventional embossing, degassing cannot be quantified and cannot be controlled by any means. In a mechanical measurement method such as a surface roughness meter, the detection accuracy has a limit (about 2 μm), and the embossed concave portion is not used. The air remaining on the surface deteriorates the degassing property, and the glossiness of the embossed surface measured according to JIS Z 8741 has a strong correlation with the blocking property between interlayer films during storage and the degassing property during lamination. Have been found to have high detection accuracy and have completed the present invention.
【０００９】[0009]
【課題を解決するための手段】請求項１記載の発明の合
わせガラス用中間膜は、熱可塑性樹脂シートの両面に微
細な凹凸が付与されてなる合わせガラス用中間膜であっ
て、ＪＩＳ Ｚ ８７４１に準拠して測定されるエンボ
ス面の光沢度が、５〜１２％の範囲にあることを特徴と
する。The interlayer film for laminated glass according to the first aspect of the present invention is an interlayer film for laminated glass in which fine irregularities are provided on both surfaces of a thermoplastic resin sheet, and is JIS Z8741. Is characterized in that the glossiness of the embossed surface measured in accordance with the standard is in the range of 5 to 12%.
【００１０】請求項２記載の発明の合わせガラス用中間
膜は、熱可塑性樹脂シートの両面に微細な凹凸が付与さ
れてなる合わせガラス用中間膜であって、ＪＩＳ Ｋ
７１０５に準拠して測定される全光線透過率が、２５〜
４０％の範囲にあることを特徴とする。The interlayer film for laminated glass according to the invention of claim 2 is an interlayer film for laminated glass in which fine irregularities are provided on both surfaces of a thermoplastic resin sheet.
The total light transmittance measured according to 7105 is 25 to
It is characterized by being in the range of 40%.
【００１１】請求項３記載の発明の合わせガラス用中間
膜は、熱可塑性樹脂シートの両面に微細な凹凸が付与さ
れてなる合わせガラス用中間膜であって、ＪＩＳ Ｚ
８７４１に準拠して測定されるエンボス面の光沢度が、
５〜１２％の範囲にあり、且つ、ＪＩＳ Ｋ ７１０５
に準拠して測定される全可視光線透過率が、２５〜４０
％の範囲にあることを特徴とする。The interlayer film for laminated glass according to the third aspect of the present invention is an interlayer film for laminated glass in which fine irregularities are provided on both surfaces of a thermoplastic resin sheet.
The glossiness of the embossed surface measured according to 8741 is
In the range of 5 to 12% and JIS K 7105
Total visible light transmittance measured in accordance with
%.
【００１２】本発明の合わせガラス用中間膜を用いて得
られる「合わせガラス」とは、代表的には２枚のガラス
板の間に可塑化ポリビニルブチラール樹脂等の熱可塑性
樹脂シートからなる合わせガラス用中間膜を挟着してな
るものであるが、ガラス板の一方が、透明なポリカーボ
ネート樹脂板やアクリル系樹脂板等からなるものをも含
むものである。The term “laminated glass” obtained by using the interlayer film for a laminated glass of the present invention typically means an interlayer for a laminated glass comprising a thermoplastic resin sheet such as a plasticized polyvinyl butyral resin between two glass plates. Although the film is sandwiched, one of the glass plates includes a transparent polycarbonate resin plate or an acrylic resin plate.
【００１３】上記２枚のガラス板の間に中間膜として挟
着される熱可塑性樹脂シートとしては、ガラス板の透明
性を実質的に阻害せず、且つ、２枚のガラス板を強固に
接着し得るものであれば特に限定されるものではない
が、例えば、可塑化ポリビニルブチラール樹脂等のポリ
ビニルアセタール系樹脂シート、ポリウレタン系樹脂シ
ート、エチレン−酢酸ビニル共重合樹脂、エチレン−エ
チルアクリレート共重合樹脂等のポリオレフィン系樹脂
シート、可塑化塩化ビニル系樹脂シート等が挙げられ
る。これらの熱可塑性樹脂シートの上記透明性及び接着
性等の中間膜としての特性を細分化して示せば、これら
の特性が長期に保持されるための耐候性や接着性の度合
いを示す衝突物の耐貫通性等が付加される。The thermoplastic resin sheet sandwiched between the two glass plates as an interlayer film does not substantially impair the transparency of the glass plates and can firmly adhere the two glass plates. It is not particularly limited as long as it is, for example, polyvinyl acetal resin sheet such as plasticized polyvinyl butyral resin, polyurethane resin sheet, ethylene-vinyl acetate copolymer resin, ethylene-ethyl acrylate copolymer resin and the like. Polyolefin-based resin sheets, plasticized vinyl chloride-based resin sheets, and the like can be given. If the properties of the thermoplastic resin sheet as an intermediate film such as the transparency and adhesiveness are subdivided and shown, a collision object showing the degree of weather resistance and adhesiveness for maintaining these properties for a long time can be obtained. Penetration resistance and the like are added.
【００１４】上記熱可塑性樹脂シートのうち、特に可塑
化ポリビニルブチラール樹脂が好適に用いられる。上記
熱可塑性樹脂の可塑化に用いられる可塑剤としては、特
に限定されるものではないが、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
ヘキシル酸、アジピン酸等の一塩基性脂肪酸との反応に
よって得られるグリコールエステル系可塑剤、トリブト
キシエチルホスフェート、イソデシルフェニルホスフェ
ート等のリン酸エステル系可塑剤等が挙げられる。Among the above thermoplastic resin sheets, plasticized polyvinyl butyral resin is particularly preferably used. Examples of the plasticizer used for plasticizing the thermoplastic resin include, but are not particularly limited to, triethylene glycol and one base such as butyric acid, isobutyric acid, caproic acid, 2-ethylhexylic acid, and adipic acid. And glycolic acid-based plasticizers obtained by reaction with a fatty acid, and phosphate-based plasticizers such as tributoxyethyl phosphate and isodecylphenyl phosphate.
【００１５】これらの熱可塑性樹脂シートの厚さは、合
わせガラスの用途に応じて、合わせガラスとしての必要
強度、例えば、耐貫通性等を考慮して決められるもので
あるが、好ましくは０．２〜２ｍｍ程度である。The thickness of these thermoplastic resin sheets is determined in consideration of the required strength of the laminated glass, for example, penetration resistance, etc., depending on the use of the laminated glass. It is about 2 to 2 mm.
【００１６】上記熱可塑性樹脂シートの両面に微細な凹
凸を付与する方法としては、特に限定されるものではな
いが、長尺の熱可塑性樹脂シートの両面にガラス板を積
層する際に、気泡の取り込みが少なく、取扱性が良好
で、生産性の高いエンボスを付与するためには、例え
ば、エンボスロール法が挙げられる。The method for providing fine irregularities on both surfaces of the thermoplastic resin sheet is not particularly limited, but when laminating glass plates on both surfaces of a long thermoplastic resin sheet, bubbles may be generated. In order to impart embossing with little incorporation, good handling properties, and high productivity, for example, an embossing roll method can be used.
【００１７】上記エンボスロール法としては、請求項４
記載の発明の合わせガラス用中間膜の製造方法が好まし
い。即ち、請求項１〜３記載の合わせガラス用中間膜を
製造する方法であって、 一対のエンボスロール間に熱可塑性樹脂シートを通過
させて該熱可塑性樹脂シートの表面にエンボスロールの
表面形状を転写する合わせガラス用中間膜の製造方法で
あり、 上記熱可塑性樹脂シートの表面にエンボスロールの表
面形状を転写する際の中間膜基材とエンボスロール表面
との接着力が１５０ｇ／ｃｍ以下であることを特徴とす
る。 この時、接着力の測定温度は２０℃とする。この時、
接着力が１５０ｇ／ｃｍを超えると光沢度及び透過率が
低下することがあるため、接着力を１５０ｇ／ｃｍ以下
とすることで、より好適な光沢度及び透過率を得ること
が可能となる。The embossing roll method is described in claim 4.
The method for producing an interlayer film for laminated glass according to the invention described above is preferred. That is, a method for producing an interlayer film for laminated glass according to claims 1 to 3, wherein a thermoplastic resin sheet is passed between a pair of embossing rolls to form a surface shape of the embossing roll on the surface of the thermoplastic resin sheet. A method for producing an interlayer film for laminated glass to be transferred, wherein the adhesive force between the intermediate film substrate and the embossing roll surface when transferring the surface shape of the embossing roll to the surface of the thermoplastic resin sheet is 150 g / cm or less. It is characterized by the following. At this time, the measurement temperature of the adhesive force is 20 ° C. At this time,
If the adhesive strength exceeds 150 g / cm, the gloss and the transmittance may decrease. Therefore, by setting the adhesive strength to 150 g / cm or less, it is possible to obtain more suitable gloss and the transmittance.
【００１８】又、上記合わせガラス用中間膜は、一対の
エンボスロールを用いる成形法のうち、エンボスロール
の表面形状を中間膜基材に転写する際の中間膜基材とエ
ンボスロール表面との接着力が１５０ｇ／ｃｍ以下に保
つことで容易に成形することができる。この時の接着力
の測定は、実際の成形状態では基材破壊があり測定でき
ないため２０℃に放冷後測定した。上記接着力が１５０
ｇ／ｃｍを超えると、中間膜基材からエンボスロールが
離型する際にエンボスロール表面に中間膜基材が接着し
テーリング状態となり、微細なエンボスが発生するた
め、所望の光沢度及び全光線透過率が得られなくなる。The interlayer film for laminated glass may be formed by bonding the surface of the embossing roll to the surface of the embossing roll when the surface shape of the embossing roll is transferred to the intermediate film substrate among molding methods using a pair of embossing rolls. By maintaining the force at 150 g / cm or less, molding can be easily performed. At this time, the adhesive strength was measured after cooling to 20 ° C. because the substrate was broken in an actual molding state and could not be measured. The adhesive strength is 150
If it exceeds g / cm, when the embossing roll is released from the intermediate film substrate, the intermediate film substrate adheres to the surface of the embossing roll to be in a tailing state, and fine embossing is generated. The transmittance cannot be obtained.
【００１９】請求項１記載の発明の合わせガラス用中間
膜の上記微細な凹凸が付与された熱可塑性樹脂シートの
エンボス面は、ＪＩＳ Ｚ ８７４１に準拠して測定さ
れる光沢度が、５〜１２％の範囲、好ましくは６〜１０
％の範囲にあるものである。上記エンボス面の光沢度が
５％未満であると、微細な凹部等に空気が残留してガラ
ス板と中間膜との接着力が低下し、１２％を超えると、
中間膜同士のブロッキング性が増大し、保管時のブロッ
キングが生じると共に、ガラス板間に積層する作業性を
低下させるものとなる。上記光沢度は、日本電色社製、
光沢計「ＶＧＳ−３００Ａ」を用いて、上記ＪＩＳ法の
測定方法２に従って測定された。The embossed surface of the thermoplastic resin sheet provided with the fine irregularities of the interlayer film for laminated glass according to the first aspect of the present invention has a glossiness of 5 to 12 measured in accordance with JIS Z8741. %, Preferably 6 to 10%.
%. When the glossiness of the embossed surface is less than 5%, air remains in fine recesses and the like, and the adhesive strength between the glass plate and the interlayer is reduced.
The blocking property between interlayer films increases, blocking occurs during storage, and the workability of laminating between glass plates is reduced. The glossiness is Nippon Denshoku Co., Ltd.
The gloss was measured using a gloss meter “VGS-300A” in accordance with the measurement method 2 of the above JIS method.
【００２０】請求項２記載の発明の合わせガラス用中間
膜の上記微細な凹凸が付与された熱可塑性樹脂シートの
ＪＩＳ Ｋ ７１０５に準拠して測定される全光線透過
率は、２５〜４０％、好ましくは３０〜３６％である。
上記光線透過率が２５％未満であると、微細な凹部等に
空気が残留してガラス板と中間膜の接着力が低下するこ
とがあり、４０％を超えると、中間膜同士のブロッキン
グ性が増大したり、ガラス板間に積層する作業性が低下
したりすることがある。上記全光線透過率の測定は、例
えば、東京電色社製、「アドヒィージョンフォトメータ
ーＴＡ−７０７」（光源：１２Ｖ５０Ｗハロゲンラン
プ、受光素子：シリコンフォトセル）を用いて、１５ｃ
ｍ×１５ｃｍの試料を光学系にセットし、デジタル表示
を１００に合わせて行われる。The total light transmittance of the thermoplastic resin sheet provided with the fine unevenness of the interlayer film for laminated glass according to the invention of claim 2 measured in accordance with JIS K 7105 is 25 to 40%, Preferably it is 30 to 36%.
If the light transmittance is less than 25%, air may remain in fine recesses and the like, and the adhesive strength between the glass plate and the interlayer may decrease. In some cases, the workability of laminating between glass plates may decrease. The measurement of the total light transmittance is performed by using, for example, "Adhesion Photometer TA-707" (light source: 12V50W halogen lamp, light receiving element: silicon photocell) manufactured by Tokyo Denshoku Co., Ltd., at 15c.
An mx 15 cm sample is set in the optical system, and the digital display is adjusted to 100.
【００２１】上記全光線透過率は、上記保管時の中間膜
同士のブロッキング性及び積層時の脱気性に強い相関を
有し、且つ、高い検出精度を有するものであるので、上
記微細な凹凸が付与された熱可塑性樹脂シートの光線透
過率が２５〜４０％である合わせガラス用中間膜とする
ことによって、保管時の中間膜同士のブロッキングを少
なくし、合わせガラス製造における積層時の脱気が十分
になされるものである。The total light transmittance has a strong correlation with the blocking property between the interlayer films during storage and the degassing property during lamination and has high detection accuracy. By providing an interlayer film for laminated glass in which the applied thermoplastic resin sheet has a light transmittance of 25 to 40%, blocking between the interlayer films during storage is reduced, and degassing during lamination in laminated glass production is reduced. It is well done.
【００２２】請求項３記載の発明の合わせガラス用中間
膜は、ＪＩＳ Ｚ ８７４１に準拠して測定されるエン
ボス面の光沢度が、５〜１２％の範囲、好ましくは６〜
１０％の範囲にあり、且つ、ＪＩＳ Ｋ ７１０５に準
拠して測定される全可視光線透過率が、２５〜４０％の
範囲、好ましくは３０〜３６％の範囲にあるものであ
る。このように前記する光沢度と全光線透過率との双方
を至適範囲にした合わせガラス用中間膜とすることでよ
り効果を確実になし得るものである。In the interlayer film for laminated glass according to the third aspect of the present invention, the glossiness of the embossed surface measured according to JIS Z8741 is in the range of 5 to 12%, preferably 6 to 12.
It is in the range of 10% and the total visible light transmittance measured in accordance with JIS K 7105 is in the range of 25 to 40%, preferably in the range of 30 to 36%. As described above, the effect can be more reliably achieved by forming the interlayer film for laminated glass in which both the glossiness and the total light transmittance are set in the optimum ranges.
【００２３】上記微細な凹凸からなるエンボスの形態
は、上記光沢度及び／又は全光線透過率の条件を満たす
ものであれば特に限定されるものではないが、その形状
は、例えば、三角錐、四角錐、円錐等の錐体、截頭三角
錐、截頭四角錐、截頭円錐等の截頭錐体、頭部が山型や
半球状となった擬錐体等の微細な凸部とこれに対応する
微細な凹部の多数のものからなる凹凸模様が挙げられ
る。The form of the embossing composed of the fine irregularities is not particularly limited as long as it satisfies the conditions of the glossiness and / or the total light transmittance, but the shape is, for example, triangular pyramid, With pyramids such as quadrangular pyramids and cones, truncated triangular pyramids, truncated quadrangular pyramids, truncated cones such as truncated cones, and fine projections such as pseudo pyramids with a mountain-shaped or hemispherical head Corresponding to this is a concavo-convex pattern composed of many fine concave portions.
【００２４】上記凹部及び凸部の寸法は、上記条件を満
たすものであれば特に限定されるものではなく、又、同
一寸法の凹部及び凸部のみからなる凹凸模様であっても
よく、異なる寸法及び／又は異なる形状の凹部及び凸部
が混ざり合った凹凸模様であってもよい。又、上記凹凸
模様は、凹部及び凸部が規則的に配列されたものであっ
てもよく、ランダムに配列されたものであってもよい。The dimensions of the concave portions and the convex portions are not particularly limited as long as the above conditions are satisfied. Further, the concave and convex portions may be composed of only concave and convex portions having the same dimensions. And / or an uneven pattern in which concave and convex portions of different shapes are mixed. In addition, the concave and convex pattern may be a pattern in which concave portions and convex portions are regularly arranged, or a pattern in which the concave portions and convex portions are randomly arranged.
【００２５】上記凹部及び凸部の深さないしは高さは、
好ましくは５〜５００μｍ、特に好ましくは２０〜５０
μｍであり、凹部及び凸部の基部の大きさは、好ましく
は３０〜１０００μｍφ程度である。上記凹凸模様にお
ける凸部間の間隔は、好ましくは１００〜２０００μ
ｍ、より好ましくは１５０〜１０００μｍである。The depth or height of the concave and convex portions is
Preferably 5-500 μm, particularly preferably 20-50
μm, and the size of the base of the concave and convex portions is preferably about 30 to 1000 μmφ. The interval between the projections in the above-mentioned uneven pattern is preferably 100 to 2000 μm.
m, more preferably 150 to 1000 μm.
【００２６】請求項１記載の発明の合わせガラス用中間
膜は、熱可塑性樹脂シートの両面に微細な凹凸が付与さ
れてなる合わせガラス用中間膜であって、ＪＩＳ Ｚ
８７４１に準拠して測定されるエンボス面の光沢度が、
５〜１２％の範囲にあるものであり、上記エンボス面の
光沢度は、保管時の中間膜同士のブロッキング防止性及
び積層時の脱気性に強い相関を有し、且つ、表面粗さ計
等の機械的接触法によるエンボス形状の測定法からは到
底検出し得ない高い検出精度で上記品質の良否を峻別で
きるので、保管中の中間膜同士のブロッキング防止性及
びガラス板と中間膜とを重ね合わせる際の作業性が良好
であり、更には、ガラスと中間膜との各層間に残存する
空気を排除する予備圧着工程を設けなくとも、２枚のガ
ラス板間に挟着した中間膜を直接圧着して優れた合わせ
ガラスとなし得るものである。The interlayer film for laminated glass according to the first aspect of the present invention is an interlayer film for laminated glass in which fine irregularities are provided on both surfaces of a thermoplastic resin sheet.
The glossiness of the embossed surface measured according to 8741 is
5 to 12%, and the glossiness of the embossed surface has a strong correlation with the anti-blocking property between interlayer films during storage and the degassing property during lamination, and a surface roughness meter or the like. The quality of the above quality can be distinguished with high detection accuracy that can not be detected at all from the method of measuring the embossed shape by the mechanical contact method of, so that the interlayer film during storage is prevented from blocking and the glass plate and interlayer film are stacked. The workability at the time of joining is good, and the intermediate film sandwiched between the two glass plates can be directly applied without a preliminary press-bonding step for eliminating air remaining between the layers of the glass and the intermediate film. It can be made into an excellent laminated glass by pressing.
【００２７】請求項２記載の発明の合わせガラス用中間
膜は、熱可塑性樹脂シートの両面に微細な凹凸がエンボ
スされてなる合わせガラス用中間膜であって、ＪＩＳ
Ｋ７１０５に準拠して測定されるエンボスが施された合
わせガラス用中間膜の全光線透過率が、２５〜４０％の
範囲にあるものであり、上記エンボスが施された合わせ
ガラス用中間膜の全光線透過率が、保管時の中間膜同士
のブロッキング防止性及び積層時の脱気性に強い相関を
有し、且つ、表面粗さ計等の機械的接触法によるエンボ
ス形状の測定法からは到底検出し得ない高い検出精度で
上記品質の良否を峻別できるので、保管中の中間膜同士
のブロッキング防止性及びガラス板と中間膜とを重ね合
わせる際の作業性が良好であり、更には、ガラスと中間
膜との各層間に残存する空気を排除する予備圧着工程を
設けなくとも、２枚のガラス板間に挟着した中間膜を直
接圧着して優れた合わせガラスとなし得るものである。The interlayer film for laminated glass according to the second aspect of the present invention is an interlayer film for laminated glass in which fine irregularities are embossed on both surfaces of a thermoplastic resin sheet.
The total light transmittance of the embossed interlayer film for laminated glass measured according to K7105 is in the range of 25 to 40%, and the total of the embossed interlayer film for laminated glass is The light transmittance has a strong correlation with the anti-blocking property of interlayers during storage and the degassing property during lamination, and is completely detected from the method of measuring the emboss shape by a mechanical contact method such as a surface roughness meter. Since the quality can be distinguished with high detection accuracy that cannot be performed, the anti-blocking property of the interlayer films during storage and the workability when overlapping the glass plate and the interlayer film are good, and furthermore, with the glass. An excellent laminated glass can be obtained by directly press-bonding the intermediate film sandwiched between two glass plates without providing a preliminary press-bonding step of removing air remaining between the interlayers and each layer.
【００２８】請求項３記載の発明の合わせガラス用中間
膜は、ＪＩＳ Ｚ ８７４１に準拠して測定されるエン
ボス面の光沢度を上記範囲にすると共に、ＪＩＳ Ｋ
７１０５に準拠して測定されるエンボスが施された合わ
せガラス用中間膜の全光線透過率を上記範囲にすること
によって、更に上記効果を顕著に現出するものである。The interlayer film for a laminated glass according to the third aspect of the present invention has the embossed surface glossiness measured in accordance with JIS Z8741 within the above-mentioned range and JIS K.
By setting the total light transmittance of the embossed interlayer film for a laminated glass measured in accordance with 7105 in the above-mentioned range, the above-mentioned effect is more remarkably exhibited.
【００２９】請求項４記載の発明の合わせガラス用中間
膜の製造方法は、請求項１〜３記載の合わせガラス用中
間膜の製造方法であって、一対のエンボスロール間に熱
可塑性樹脂シートを通過させて該熱可塑性樹脂シートの
表面にエンボスロールの表面形状を転写するに際して、
温度２０℃におけるエンボスロールと熱可塑性樹脂シー
トとの接着力が１５０ｇ／ｃｍ以下であるので、所望の
優れた光沢度と全光線透過率を得ることができる。According to a fourth aspect of the present invention, there is provided a method of manufacturing an interlayer film for laminated glass, comprising the steps of: forming a thermoplastic resin sheet between a pair of embossing rolls; When transferring the surface shape of the emboss roll to the surface of the thermoplastic resin sheet by passing
Since the adhesive strength between the embossing roll and the thermoplastic resin sheet at a temperature of 20 ° C. is 150 g / cm or less, desired excellent gloss and total light transmittance can be obtained.
【００３０】[0030]
【発明の実施の形態】以下に、本発明の実施例及び比較
例を示す。 （実施例１〜３、比較例１〜３） 〔エンボスロールの作製〕凹部と凸部が規則的に配列さ
れた凹凸模様を有する複数種のエンボス形成用彫刻ミル
（マザーミル）を準備し、金属ロール表面に、上記彫刻
ミルを押し付けた状態で金属ロールと彫刻ミルを互いに
逆方向に回転させることにより、彫刻ミルの凹凸模様を
金属ロールに転写した。その際、彫刻ミルの凹凸模様を
単純に転写したもの、必要に応じて該彫刻ミルの転写の
途中で、彫刻ミルの凹凸模様を金属ロールの軸線に沿っ
てずらすことによって彫刻ミルの凹凸模様を金属ロール
表面に不規則に転写したもの等、表１に示す各種サイズ
の凹凸模様が形成されたエンボスロールを作製した。DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples and comparative examples of the present invention are shown below. (Examples 1 to 3 and Comparative Examples 1 to 3) [Preparation of embossing roll] A plurality of types of embossing engraving mills (mother mills) having a concave and convex pattern in which concave portions and convex portions are regularly arranged were prepared, and metal was prepared. By rotating the metal roll and the engraving mill in opposite directions with the engraving mill pressed against the roll surface, the concavo-convex pattern of the engraving mill was transferred to the metal roll. At that time, the irregular pattern of the engraving mill is simply transferred, and if necessary, during the transfer of the engraving mill, the irregular pattern of the engraving mill is shifted along the axis of the metal roll. Embossed rolls having irregularly-shaped patterns of various sizes shown in Table 1, such as those irregularly transferred to the surface of a metal roll, were produced.
【００３１】このようにして作製された互いに逆方向に
回転する１対のエンボスロールを用い、その間に厚さ
０．７６ｍｍの可塑化ポリビニルブチラール樹脂シート
を通過させて移送し、該エンボスロール表面の凹凸模様
を転写して表１に各々示す表面光沢度と光線透過率を有
する合わせガラス用中間膜を作製した。Using a pair of embossing rolls rotating in opposite directions produced as described above, a plasticized polyvinyl butyral resin sheet having a thickness of 0.76 mm is transported between the embossing rolls, and the surface of the embossing roll is transferred. The uneven pattern was transferred to produce an interlayer film for laminated glass having the surface glossiness and the light transmittance shown in Table 1.
【００３２】尚、本発明の合わせガラス用中間膜のエン
ボス面の光学的性質と対比させて従来より機械的方法で
測定されているエンボス形状を、ＪＩＳ Ｂ ０６０１
に準拠して、算術平均粗さ（Ｒａ）及び十点平均粗さ
（Ｒｚ）を、ドイツ国FernpufPerthen GmbH社製の表面
粗さ計（商品名「Perthometer S3P 」）及び明神工機社
製の上記「Perthometer S3P 」仕様の表面形状解析装置
（商品名「SAS-2010」）を用いて測定し、表１に併せて
表示した。The embossed shape conventionally measured by a mechanical method in comparison with the optical properties of the embossed surface of the interlayer film for laminated glass of the present invention is described in JIS B0601.
The arithmetic average roughness (Ra) and the ten-point average roughness (Rz) were measured in accordance with the surface roughness tester (trade name "Perthometer S3P", manufactured by Fernpuf Perthen GmbH, Germany) and the above-described model manufactured by Myojin Koki Co., Ltd. The measurement was performed using a surface shape analyzer (trade name “SAS-2010”) of “Perthometer S3P” specification, and the results are also shown in Table 1.
【００３３】実施例１〜３及び比較例１〜３で得られた
合わせガラス用中間膜の性能を評価するため、以下に示
す方法で自着性（中間膜同士のブロッキング性）及びベ
ークテストによる予備圧着工程における脱気性を評価
し、これらの結果をとりまとめて総合評価に示した。評
価結果は表１に示した。In order to evaluate the performance of the interlayer films for laminated glass obtained in Examples 1 to 3 and Comparative Examples 1 to 3, self-adhesion (blocking between interlayer films) and baking tests were carried out by the following methods. The deaeration in the pre-compression bonding step was evaluated, and these results were compiled and shown in the comprehensive evaluation. The evaluation results are shown in Table 1.
【００３４】１．自着性：中間膜を１５ｃｍ×１５ｃｍ
に裁断して２枚積み重ね、その上に１３ｋｇの荷重を加
え、室温にて２４時間放置した後、引張試験機を用い、
引張速度５００ｍｍ／分にて１８０°剥離試験を行い、
そのときに得られた剥離力の平均値（繰返し数５）を求
め、この値からこの中間膜の自着性を評価した。1. Self-adhesiveness: 15 cm x 15 cm interlayer
After stacking two sheets, applying a load of 13 kg on it and leaving it at room temperature for 24 hours, using a tensile tester,
Perform a 180 ° peel test at a tensile speed of 500 mm / min.
The average value (the number of repetitions: 5) of the peeling force obtained at that time was determined, and the self-adhesiveness of this intermediate film was evaluated from this value.
【００３５】２．脱気性：中間膜を２枚の透明なフロー
トガラス板（縦３０ｃｍ×横３０ｃｍ×厚さ３ｍｍ）の
間に挟み、はみ出した部分を切り取って得られた積層体
を加熱オーブン内で、積層体の温度（予備圧着温度）が
それぞれ６０℃、７０℃、８０℃になるように加熱し、
ニップロール（エアシリンダーによるニップ圧５ｋｇ／
ｃｍ2 、線速度１０ｍ／分）間を移送して予備圧着を行
った。2. Deaeration: The interlayer is sandwiched between two transparent float glass plates (length 30 cm × width 30 cm × thickness 3 mm), the protruding portion is cut out, and the obtained laminate is heated in an oven to form a laminate. Heat so that the temperature (preliminary compression temperature) becomes 60 ° C, 70 ° C, and 80 ° C, respectively.
Nip roll (nip pressure 5 kg /
cm 2 at a linear velocity of 10 m / min) for pre-compression bonding.
【００３６】予備圧着された積層体を、オートクレーブ
内で、温度１３５℃、圧力１２ｋｇ／ｃｍ2 の条件下に
２０分間保持した後、５０℃まで温度を下げ大気圧に戻
すことにより本圧着を終了して合わせガラスを作製し
た。The pre-pressed laminate is held in an autoclave at a temperature of 135 ° C. and a pressure of 12 kg / cm 2 for 20 minutes, and then the temperature is lowered to 50 ° C. and returned to the atmospheric pressure, thereby completing the final press-bonding. To produce a laminated glass.
【００３７】得られた合わせガラスを、過酷な条件を想
定して、１４５℃のオーブンで２時間加熱し、オーブン
から取り出して３時間冷却し、合わせガラスに発泡（気
泡）が生じた枚数（発泡枚数／試験枚数１００枚中）を
調べて脱気性を評価した。The obtained laminated glass was heated in an oven at 145 ° C. for 2 hours under severe conditions, taken out of the oven and cooled for 3 hours, and the number of foams (bubbles) generated in the laminated glass (foaming) The number of sheets / out of 100 sheets) was examined to evaluate the deaeration.
【００３８】３．総合評価：自着性及び脱気性の評価カ
ラムにおいて、改善なしとしてロットアウトされる数値
にアンダーラインを施し、○：本発明の目的を達してい
るもの、×：改善なしと評価されるもの、の２段階で総
合評価した。3. Comprehensive evaluation: In the self-adhesiveness and degassing evaluation columns, underlined numerical values lotted out as no improvement, ○: those that achieved the object of the present invention, ×: those that were evaluated as no improvement, The overall evaluation was made in two stages.
【００３９】[0039]
【表１】 [Table 1]
【００４０】表１に示すように、実施例１〜４の合わせ
ガラス用中間膜は、いずれも保管時に中間膜同士がブロ
ッキングしたりすることがなく、合わせガラス製造時の
中間膜の位置決めが容易である等の優れた性能を、自着
性データより読み取ることができ、２枚のガラス板間
に、予備圧着工程を設けることなく直接本圧着して気泡
を含まない合わせガラスを製造し得る程度に脱気が十分
行われていることが脱気性のデータに示されている。As shown in Table 1, any of the interlayer films for laminated glass of Examples 1 to 4 did not cause blocking between the interlayer films during storage, and facilitated positioning of the interlayer film during the production of laminated glass. It can be read from the self-adhesion data, and it is possible to produce a laminated glass free of bubbles by performing direct pressure bonding between two glass plates without providing a preliminary pressure bonding step. The degassing data shows that degassing is sufficiently performed.
【００４１】これに対して、比較例１の合わせガラス用
中間膜は、保管時における中間膜同士のブロッキングは
少ないが、脱気性のデータが示すように低温度における
圧着では脱気が十分に行われず、比較例２及び３の合わ
せガラス用中間膜は、保管時における中間膜同士のブロ
ッキングが著しく、いずれも安定して合わせガラスを製
造するための中間膜としては、十分なものではなく、総
合評価として改善なしと評価された。On the other hand, the interlayer film for laminated glass of Comparative Example 1 has little blocking between interlayer films during storage, but as shown in the degassing data, degassing is sufficiently performed by pressure bonding at a low temperature. However, the interlayer films for laminated glass of Comparative Examples 2 and 3 were remarkably blocked between the interlayer films during storage, and both were not sufficient as interlayer films for stably producing laminated glass. No improvement was evaluated.
【００４２】[0042]
【発明の効果】本発明の合わせガラス用中間膜は、上述
のように構成されているので、保管中の中間膜同士のブ
ロッキング防止性及びガラス板と中間膜とを重ね合わせ
る際の作業性が良好であり、更には、ガラスと中間膜と
の各層間に残存する空気を排除する予備圧着工程を設け
なくとも、２枚のガラス板間に挟着した中間膜を直接圧
着して優れた合わせガラスとなし得るものである。又、
本発明の合わせガラス用中間膜の製造方法は、上述のよ
うに構成されているので、所望の優れた光沢度及び全光
線透過率を付与し得るものである。Since the interlayer film for laminated glass of the present invention is constituted as described above, the anti-blocking property between the interlayer films during storage and the workability when laminating the glass plate and the interlayer film are improved. It is good, and furthermore, the intermediate film sandwiched between the two glass plates is directly compressed to provide excellent alignment without the need for a preliminary pressure bonding step for eliminating air remaining between the layers of the glass and the intermediate film. It can be made of glass. or,
Since the method for producing an interlayer film for laminated glass of the present invention is configured as described above, it is possible to impart desired excellent glossiness and total light transmittance.
Claims (4)
が付与されてなる合わせガラス用中間膜であって、ＪＩ
Ｓ Ｚ ８７４１に準拠して測定されるエンボス面の光
沢度が、５〜１２％の範囲にあることを特徴とする合わ
せガラス用中間膜。1. An interlayer film for laminated glass having fine irregularities provided on both surfaces of a thermoplastic resin sheet, comprising JI
An interlayer film for laminated glass, wherein the glossiness of the embossed surface measured according to SZ8741 is in the range of 5 to 12%.
が付与されてなる合わせガラス用中間膜であって、ＪＩ
Ｓ Ｋ ７１０５に準拠して測定される全光線透過率
が、２５〜４０％の範囲にあることを特徴とする合わせ
ガラス用中間膜。2. An interlayer film for laminated glass having fine irregularities provided on both surfaces of a thermoplastic resin sheet, comprising JI
An interlayer film for laminated glass, wherein the total light transmittance measured according to SK 7105 is in the range of 25 to 40%.
が付与されてなる合わせガラス用中間膜であって、ＪＩ
Ｓ Ｚ ８７４１に準拠して測定されるエンボス面の光
沢度が、５〜１２％の範囲にあり、且つ、ＪＩＳ Ｋ
７１０５に準拠して測定される全可視光線透過率が、２
５〜４０％の範囲にあることを特徴とする合わせガラス
用中間膜。3. An interlayer film for laminated glass having fine irregularities provided on both surfaces of a thermoplastic resin sheet, comprising JI
The glossiness of the embossed surface measured according to SZ8741 is in the range of 5 to 12%, and JIS K
The total visible light transmittance measured according to 7105 is 2
An interlayer for laminated glass, which is in the range of 5 to 40%.
膜の製造方法であって、一対のエンボスロール間に熱可
塑性樹脂シートを通過させて該熱可塑性樹脂シートの表
面にエンボスロールの表面形状を転写するに際して、温
度２０℃におけるエンボスロールと熱可塑性樹脂シート
との接着力が１５０ｇ／ｃｍ以下であることを特徴とす
る合わせガラス用中間膜の製造方法。4. The method for producing an interlayer film for laminated glass according to claim 1, wherein a thermoplastic resin sheet is passed between a pair of embossing rolls so that a surface of the embossing roll is formed on the surface of the thermoplastic resin sheet. A method for producing an interlayer film for laminated glass, wherein the adhesive force between the embossing roll and the thermoplastic resin sheet at a temperature of 20 ° C. at the time of transferring the shape is 150 g / cm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11102796A JP2000290046A (en) | 1999-04-09 | 1999-04-09 | Intermediate film for sandwich glass and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11102796A JP2000290046A (en) | 1999-04-09 | 1999-04-09 | Intermediate film for sandwich glass and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000290046A true JP2000290046A (en) | 2000-10-17 |
Family
ID=14337059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11102796A Pending JP2000290046A (en) | 1999-04-09 | 1999-04-09 | Intermediate film for sandwich glass and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000290046A (en) |
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