JP4612337B2 - Method for manufacturing panel laminate - Google Patents

Method for manufacturing panel laminate Download PDF

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JP4612337B2
JP4612337B2 JP2004141402A JP2004141402A JP4612337B2 JP 4612337 B2 JP4612337 B2 JP 4612337B2 JP 2004141402 A JP2004141402 A JP 2004141402A JP 2004141402 A JP2004141402 A JP 2004141402A JP 4612337 B2 JP4612337 B2 JP 4612337B2
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adhesive sheet
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誠 稲永
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三菱樹脂株式会社
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本発明は、防犯性、安全性、防災の要求される住宅建材用窓、工作機械用窓、車両用窓、金融関係の窓、貴金属や美術品のショーケース、積層光学レンズ等の合わせガラスや耐衝撃性、軽量性、視認性の求められる液晶表示、プラズマディスプレイ(PDP)表示、EL表示等の平面型画像装置及び太陽電池パネル等の透明保護パネル積層体、装飾性、意匠性を有するパネル等を構成するパネル積層体の製造方法に関する。 The present invention relates to a window for a housing building material, a window for a machine tool, a window for a vehicle, a window for finance, a showcase for a precious metal or a work of art, a laminated optical lens such as a laminated optical lens, which is required for crime prevention, safety and disaster prevention. Flat type image devices such as liquid crystal display, plasma display (PDP) display, EL display and the like which require impact resistance, light weight and visibility, and transparent protective panel laminates such as solar cell panels, panels having decorativeness and design It is related with the manufacturing method of the panel laminated body which comprises.
従来、合わせガラスや保護パネルはガラス板が主に用いられていたが、近年これらの防犯性、安全性、防災性、軽量化、耐衝撃性向上の要求が高まり、ガラス板に代わる材料としてアクリル板やポリカーボネート(PC)板などの合成樹脂板を合わせた異種合わせガラスが広く用いられるようになった。
しかしながら、ガラス板と合成樹脂板の線膨張係数が異なることから、従来の熱可塑性樹脂を用いたオートクレーブ方式あるいは紫外線や熱硬化型液状接着剤を用いた方式では合わせガラス作製後に反り、剥離、割れなどを生じるという問題があった。
また、画像表示装置等に保護パネルを積層する場合では圧力や熱が加えにくく簡易に積層できなかった。
さらに、年々過激化する犯罪に対して従来の窓貼りフィルムでは防犯性や安全性能が充分でないため、車両、一般住宅、金融や高価な物品を扱う店舗関係の窓やショーケースにPC合わせガラス等を使用する要求が高まっているが、大面積になるほど反り、剥離、割れが大きくなること、また既存の窓を取り替えなければならないこと等の問題があった。
かかる問題点を解決すべく、本発明者は、「片面もしくは両面の粘着表面に、凹凸パターンを施した離型フィルムによって凹凸パターンが形成されていることを特徴とする両面粘着シート。」を提案した(特許文献1)。該特許文献1に記載の発明によれば、凹凸パターンが形成された粘着表面に均等な圧力を加えることで、凹部から空気を逃しながらパネル同士を圧着することができ、圧着装置を使用してパネルの製造が容易となる。
しかし、既存のパネルに現場で施工する方法としては十分なものとはいえない。すなわち、既存のパネルのサイズ、施工されている形状や場所は一定ではないため、かかる種々の条件に対応できる圧着装置を用意するというのは困難であるという問題がある。また、従来の飛散防止フィルムのような薄いフィルムであれば手貼りでヘラ等を用いて貼ることはできるものの、シート状や板状のパネルをきれいに積層することは容易ではないという問題がある。
Conventionally, glass plates were mainly used for laminated glass and protective panels, but in recent years there has been a growing demand for crime prevention, safety, disaster prevention, lighter weight, and improved impact resistance, and acrylic as a material to replace glass plates. Different types of laminated glass combined with synthetic resin plates such as plates and polycarbonate (PC) plates have been widely used.
However, since the linear expansion coefficient of the glass plate and the synthetic resin plate is different, the conventional autoclave method using a thermoplastic resin or the method using a UV or thermosetting liquid adhesive warps, peels, cracks after the laminated glass is produced. There was a problem that caused.
In addition, when a protective panel is laminated on an image display device or the like, it is difficult to apply pressure and heat, and it is not possible to easily laminate.
Furthermore, crime prevention and safety performance are not sufficient with conventional window-laminated films against crimes that are becoming more and more severe year by year, so PC laminated glass, etc. for stores, windows and showcases related to vehicles, general housing, finance and expensive goods. However, there is a problem that warping, peeling and cracking increase as the area increases, and that existing windows must be replaced.
In order to solve such problems, the present inventor has proposed a “double-sided pressure-sensitive adhesive sheet characterized in that a concavo-convex pattern is formed on a single-sided or double-sided adhesive surface by a release film having a concavo-convex pattern”. (Patent Document 1). According to the invention described in Patent Document 1, by applying uniform pressure to the pressure-sensitive adhesive surface on which the concavo-convex pattern is formed, the panels can be pressure-bonded while letting air escape from the concave portion, and a pressure bonding device is used. Panel manufacture is facilitated.
However, it cannot be said to be sufficient as a method for constructing existing panels on site. That is, since the size of the existing panel, the shape and location of construction are not constant, there is a problem that it is difficult to prepare a crimping device that can cope with such various conditions. In addition, a thin film such as a conventional anti-scattering film can be manually attached using a spatula or the like, but there is a problem that it is not easy to neatly laminate a sheet-like or plate-like panel.
特開2003−336020号公報JP 2003-336020 A
本発明は、上記従来技術の問題点を考慮してなされたもので、施工場所やパネルの大きさを問わず、比較的小型の吸引装置を用いて常温で簡便に積層することが可能なパネル積層体の製造方法を提供することを目的とするものである。 The present invention has been made in consideration of the above-mentioned problems of the prior art, and can be easily laminated at room temperature using a relatively small suction device regardless of the construction location or the size of the panel. It aims at providing the manufacturing method of a laminated body .
上記目的を達成するため、本発明の請求項1に係るパネル積層体の製造方法は、シート状あるいは板状のパネル同士を粘着シートを介して積層してパネル積層体を製造するにあたり、表面に凹凸加工を施した柔軟な粘着シートとして、ガラス転移点が−20℃以下、かつ保持力のズレ長さが1.0〜13mmである粘着シートを用い、積層されるパネルと粘着シートの凸部とを接触させ、粘着シートの凹部によって形成される内部空隙の空気を吸引してその内部空隙を減圧状態で密封した後、減圧密封状態のまま大気圧下に1〜7日間放置することで内部空隙を消失させてパネルと粘着シートとを密着させることにより、パネル積層体を得ることを特徴とする。
本発明において、減圧密封した直後のパネル積層体には、粘着シートの凹部によって形成される内部空隙が存在するが、大気圧によって徐々にこの内部空隙が消失し、粘着シートの凹凸が無くなった状態にパネルを密着させることができる。
ここで、保持力のズレ長さとは、凹凸加工を施した粘着シートを介して38μm厚のPET(ポリエチレンテレフタレート)フィルムをSUS板(大きさ20mm×20mm)にハンドロールを用いて凹凸形状が消失する状態に接触させた後、JIS Z 0237に準じて、40℃の環境下で4.9Nの荷重を2時間かけた後のズレ長さを計測した値をいう。
In order to achieve the above object, a method for producing a panel laminate according to claim 1 of the present invention is a method of laminating sheet-like or plate-like panels together via an adhesive sheet to produce a panel laminate. As a flexible pressure-sensitive adhesive sheet subjected to uneven processing, a pressure-sensitive adhesive sheet having a glass transition point of −20 ° C. or less and a holding power misalignment length of 1.0 to 13 mm is used. And sucking the air in the internal gap formed by the concave portion of the pressure-sensitive adhesive sheet to seal the internal gap in a reduced pressure state, and then leaving it in the reduced pressure sealed state for 1 to 7 days. A panel laminate is obtained by eliminating the gap and bringing the panel and the pressure-sensitive adhesive sheet into close contact with each other.
In the present invention, the panel laminate immediately after sealing under reduced pressure has an internal gap formed by the concave portion of the pressure-sensitive adhesive sheet, but the internal gap gradually disappears due to atmospheric pressure, and the unevenness of the pressure-sensitive adhesive sheet is eliminated. The panel can be closely attached to.
Here, the displacement length of the holding force means that a 38 μm thick PET (polyethylene terephthalate) film is placed on a SUS plate (size 20 mm × 20 mm) with a hand roll through a concavo-convex adhesive sheet, and the concavo-convex shape disappears. This is a value obtained by measuring the shift length after applying a load of 4.9 N for 2 hours in an environment of 40 ° C. in accordance with JIS Z 0237 after contacting the state.
また、請求項2に係る発明は、パネルの周囲をその一部を残してシールし、残した一部から吸引装置を用いて前記内部空隙の空気を吸引してその内部空隙を減圧状態で密封することを特徴とする請求項1に記載のパネル積層体の製造方法である。   Further, the invention according to claim 2 seals the periphery of the panel, leaving a part thereof, and sucking the air in the internal space from the remaining part using a suction device, and sealing the internal space in a reduced pressure state. The method for manufacturing a panel laminate according to claim 1.
請求項1に係る発明によれば、表面に凹凸加工を施した柔軟な粘着シートを用い、積層されるパネルと粘着シートの凸部とを接触させ、粘着シートの凹部によって形成される内部空隙の空気を吸引してその内部空隙を減圧状態で密封した後、大気圧下に放置することにより、減圧状態で密封された内部空隙が大気圧で加圧され、徐々に消失し、粘着シートの凹凸が無くなった状態にパネルを密着させることができる。そして、施工場所やパネルの大きさを問わず、比較的小型の吸引装置を用いて常温で簡便に積層することが可能となる。
請求項2に係る発明によれば、特に、既設パネルに別のパネルを積層する場合に簡便である。
請求項3に係る発明によれば、貼り合わせた外観の優れた品質の良好なパネル積層体を確実に得ることができる。
According to the first aspect of the present invention, a flexible adhesive sheet having a concavo-convex surface is used, the laminated panel and the convex part of the adhesive sheet are brought into contact with each other, and the internal void formed by the concave part of the adhesive sheet After sucking air and sealing the internal space in a reduced pressure state, the internal space sealed in the reduced pressure state is pressurized at atmospheric pressure and gradually disappears by leaving it under atmospheric pressure. The panel can be brought into close contact with the state where there is no more. And it becomes possible to laminate | stack simply at normal temperature using a comparatively small attraction | suction apparatus irrespective of the magnitude | size of a construction place or a panel.
The invention according to claim 2 is particularly convenient when another panel is laminated on the existing panel.
According to the invention which concerns on Claim 3, the favorable panel laminated body of the quality which was excellent in the bonded external appearance can be obtained reliably.
本発明の請求項1に係るパネルの積層方法は、シート状あるいは板状のパネル同士を粘着シートを介して積層するにあたり、表面に凹凸加工を施した柔軟な粘着シートを用い、積層されるパネルと粘着シートの凸部とを接触させ、粘着シートの凹部によって形成される内部空隙の空気を吸引してその内部空隙を減圧状態で密封した後、大気圧下で内部空隙を消失させてパネルと粘着シートとを密着させることを特徴とする。
空気を吸引する装置は、真空ポンプや掃除機等を用いることができるが、大気圧との差圧を大きく得ることのできる真空ポンプが特に好ましい。
減圧密封する方法は、パネルの周囲をその一部を残してシールし、残した一部から吸引装置を用いて前記内部空隙の空気を吸引してその内部空隙を減圧状態で密封することができる。例えば、図1に示すように、一方のパネルBに、粘着シート1が既に貼られたパネルAを、粘着シート1を介してその凸部とパネルBとを一次的に接触させた状態とし、矩形のパネルであれば、その三辺端部を空気を吸い込まないように圧着するか、テープ等の治具10でシールしておいて、残った端部から吸引装置20を用いて、粘着シートの凹部によって形成される内部空隙の空気を吸引して残った端部をシールして減圧密封状態とし、その後大気圧下におくことにより行われる。大気圧下におく時間は、通常、1〜7日、好ましくは2〜4日である。
The method for laminating panels according to claim 1 of the present invention is a panel that is laminated by using a flexible pressure-sensitive adhesive sheet having an uneven surface on the surface when laminating sheet-like or plate-like panels via pressure-sensitive adhesive sheets. And the convex part of the pressure-sensitive adhesive sheet are brought into contact, the air in the internal gap formed by the concave part of the pressure-sensitive adhesive sheet is sucked to seal the internal gap in a reduced pressure state, and then the internal gap disappears under atmospheric pressure, The adhesive sheet is closely attached.
As a device for sucking air, a vacuum pump, a vacuum cleaner, or the like can be used, but a vacuum pump capable of obtaining a large differential pressure from atmospheric pressure is particularly preferable.
The method of sealing under reduced pressure can seal the periphery of the panel, leaving a part thereof, and sucking the air in the internal gap from the remaining part using a suction device to seal the internal gap in a reduced pressure state. . For example, as shown in FIG. 1, the panel A on which the adhesive sheet 1 has already been attached to one panel B is in a state in which the convex portions and the panel B are brought into primary contact via the adhesive sheet 1, In the case of a rectangular panel, the three side end portions are pressure-bonded so as not to suck in air or sealed with a jig 10 such as a tape, and the pressure-sensitive adhesive sheet is used from the remaining end portion by using the suction device 20. This is carried out by sucking the air in the internal gap formed by the recesses of the inner space and sealing the remaining end portion to form a vacuum-sealed state, and then placing it under atmospheric pressure. The time of keeping under atmospheric pressure is usually 1 to 7 days, preferably 2 to 4 days.
また、例えばパネル全体を袋状治具で包み、吸引装置を用いて袋の口から吸引し、封止し放置することにより、内部空隙の空気が除去され、袋を介した大気圧でパネルが加圧され、内部空隙が消失する。
また、図2に示すように、袋状治具13の中に、パネルの端部周囲を密着させる治具15を入れておき、この状態で吸引装置を用いて袋の口から吸引して、内部空隙の空気が徐々に抜けた後、治具15によりパネルの端部周囲を圧着した状態で袋を開放すると、パネルの端部周囲から空気が侵入することなく、パネルの外側の大気圧により直接加圧され、内部空隙が消失する。
Also, for example, the entire panel is wrapped with a bag-shaped jig, sucked from the mouth of the bag using a suction device, sealed, and left to remove the air in the internal voids, and the panel is opened at atmospheric pressure through the bag. Pressurized, the internal void disappears.
In addition, as shown in FIG. 2, a jig 15 for closely adhering the periphery of the end of the panel is placed in the bag-shaped jig 13, and in this state, the suction is performed from the bag mouth, After the air in the internal space gradually escapes, if the bag is opened with the jig 15 crimped around the edge of the panel, the air does not enter from the edge of the panel and the atmospheric pressure outside the panel Direct pressure is applied and the internal void disappears.
表面に凹凸加工を施した柔軟な粘着シートは、片面もしくは両面の粘着表面に、凹凸パターンを施した離型フィルムが貼られることによって粘着シートに凹凸パターンが形成されているものが好ましい。粘着面の凹凸パターンをポジ型とした場合、予めネガ型の凹凸パターンを賦形した離型フィルムを粘着シート面に貼りつけることで粘着シートに凹凸パターンを転写させる方法で得ることができ、架橋体である透明粘着シートでは、はじめから粘着シートを凹凸パターンで架橋する(凹凸パターンを賦形した離型フィルムを貼ってから架橋する)方法と、粘着シートを平面状態で架橋した後に凹凸パターンを転写する(架橋した後に凹凸パターンを賦形した離型フィルムを貼る)方法のどちらでもよいが、望ましくは粘着シートを架橋した後に凹凸パターンを転写する後者の方法がよい。
予めネガ型の凹凸パターンを賦形した離型フィルムは、エンボスロール等を用いて、例えば、凹凸形状を施した2本のロールの間に適宜厚さの離型フィルムを挟んで送り出すことにより作製することができる。離型フィルムは、2軸延伸ポリエステル系フィルムや2軸延伸ポリプロピレン系フィルムあるいはシリコーン離型剤をコーティングした紙等が好ましく用いられる。
As for the flexible adhesive sheet which gave the uneven | corrugated process on the surface, the thing by which the uneven | corrugated pattern is formed in the adhesive sheet by sticking the release film which gave the uneven | corrugated pattern on the adhesive surface of one side or both surfaces is preferable. When the uneven pattern on the adhesive surface is a positive type, it can be obtained by a method of transferring the uneven pattern to the adhesive sheet by pasting a release film pre-formed with a negative uneven pattern on the adhesive sheet surface, and crosslinking In the transparent adhesive sheet that is a body, the adhesive sheet is crosslinked from the beginning with a concavo-convex pattern (cross-linking after applying a release film shaped with a concavo-convex pattern), and the concavo-convex pattern is formed after the adhesive sheet is crosslinked in a planar state. Either of the methods of transferring (attaching a release film having a concavo-convex pattern formed after cross-linking) is preferable, but the latter method of transferring the concavo-convex pattern after cross-linking the pressure-sensitive adhesive sheet is preferable.
A release film pre-shaped with a negative concavo-convex pattern is produced by using an embossing roll or the like, for example, by feeding a release film having an appropriate thickness between two concavo-convex rolls. can do. As the release film, a biaxially stretched polyester film, a biaxially stretched polypropylene film, or a paper coated with a silicone release agent is preferably used.
凹凸パターンは、用い方によって粘着シートの片面あるいは両面に形成してもよい。図3(a)は、粘着シート1の片面に凹凸パターンを形成した例を示し、粘着シート1の片面に凹凸パターンを賦形した離型フィルム3が積層され、他方の面には凹凸パターンのない平面状の離型フィルム2が積層されている。図3(b)は、粘着シート1の両面に凹凸パターンを形成した例を示し、粘着シート1の両面に、凹凸パターンを賦形した離型フィルム3が積層されている。
凹凸パターンは、規則性のあるものが好ましい。また、粘着シートの凹部は、粘着シートの周囲端部に至るように繋がった線状をもって形成されることで、凹部が空気の逃げ道となる。空気が残留しにくい粘着シートの凹凸パターンとしては、図4に示すような(a)菱形、(b)半球状、(c)ストライプ状のほか、梨地状等の連続模様が挙げられる。特に截頭角錐状の凸パターンを有する菱形やストライプ状のものが好ましく、凹凸の山谷の深さ、大きさ等は適宜選択可能である。
You may form an uneven | corrugated pattern in the single side | surface or both surfaces of an adhesive sheet depending on how to use. FIG. 3A shows an example in which a concavo-convex pattern is formed on one side of the pressure-sensitive adhesive sheet 1, and a release film 3 shaped with the concavo-convex pattern is laminated on one side of the pressure-sensitive adhesive sheet 1, and the concavo-convex pattern is formed on the other side. A flat release film 2 is laminated. FIG. 3B shows an example in which a concavo-convex pattern is formed on both surfaces of the pressure-sensitive adhesive sheet 1, and a release film 3 having a concavo-convex pattern formed thereon is laminated on both surfaces of the pressure-sensitive adhesive sheet 1.
The uneven pattern preferably has regularity. Moreover, the recessed part of an adhesive sheet is formed with the linear form connected so that the peripheral edge part of the adhesive sheet might be reached, and a recessed part becomes an escape route of air. As an uneven | corrugated pattern of the adhesive sheet in which air does not remain easily, continuous patterns, such as (a) rhombus, (b) hemisphere, (c) stripe shape as shown in FIG. In particular, a rhombus or stripe having a truncated pyramid-shaped convex pattern is preferable, and the depth, size, etc. of the uneven valley can be selected as appropriate.
請求項3に係る発明は、前記粘着シートとして、ガラス転移点が−20℃以下、かつ保持力のズレ長さが1.0〜13mmである粘着シートを用いることを特徴とする。
ここで、保持力のズレ長さとは、凹凸加工を施した粘着シートを介して38μm厚のPET(ポリエチレンテレフタレート)フィルムをSUS板(大きさ20mm×20mm)にハンドロールを用いて凹凸形状が消失する状態に接触させた後、JIS Z 0237に準じて、40℃の環境下で4.9Nの荷重を2時間かけた後のズレ長さを計測した値をいう。賦形された粘着シートの凹凸パターンが大気圧下で消失するような柔軟性のある粘着シートであるためには常温で変形し易い必要があり、そのためにはガラス転移点は−20℃以下がよい。しかしながら、保持力のズレ長さが1.0mm未満の場合は架橋しすぎて凹凸パターンが賦形しにくかったり、あるいは賦形した凹凸パターンが消失しなかったりする。保持力のズレ長さが13mmを超える場合は凹凸の形状が崩れやすくなり、凹部(内部空隙)の空気を吸引中に空気が閉じ込められて減圧状態が得られず、大気圧下で凹部が消失しないという問題が生じる。
ほぼ完全に空気を吸引できて、かつ大気圧下で凹凸パターン(内部空隙)が消失するような、保持力のズレ長さは、さらに好ましくは5〜10mmである。
The invention according to claim 3 is characterized in that as the pressure-sensitive adhesive sheet, a pressure-sensitive adhesive sheet having a glass transition point of −20 ° C. or lower and a holding power deviation length of 1.0 to 13 mm is used.
Here, the displacement length of the holding force means that a 38 μm thick PET (polyethylene terephthalate) film is placed on a SUS plate (size 20 mm × 20 mm) with a hand roll through a concavo-convex adhesive sheet, and the concavo-convex shape disappears. This is a value obtained by measuring the shift length after applying a load of 4.9 N for 2 hours in an environment of 40 ° C. in accordance with JIS Z 0237 after contacting the state. In order to be a flexible pressure-sensitive adhesive sheet in which the uneven pattern of the shaped pressure-sensitive adhesive sheet disappears at atmospheric pressure, it is necessary to be easily deformed at room temperature. For this purpose, the glass transition point is −20 ° C. or lower. Good. However, when the shift length of the holding force is less than 1.0 mm, the concavo-convex pattern is difficult to be formed due to excessive crosslinking, or the formed concavo-convex pattern does not disappear. When the holding force misalignment length exceeds 13 mm, the shape of the unevenness tends to collapse, the air is trapped while the air in the recess (internal void) is sucked, and a reduced pressure state cannot be obtained, and the recess disappears under atmospheric pressure. The problem of not doing arises.
The displacement length of the holding force that allows the air to be almost completely sucked and the uneven pattern (internal void) disappears under atmospheric pressure is more preferably 5 to 10 mm.
本発明方法においては、例えば、両面粘着シートの少なくとも凹凸パターンを有する面と反対側の粘着面の離型フィルムを剥がしてガラス板又は合成樹脂板等の透明板材に貼った粘着シート積層板材を予め作製しておき、これを、窓材、表示パネル等に、凹凸パターンを残した粘着シート表面側の離型フィルムを剥がして貼り合わせることで、手軽に積層体を得ることができる。   In the method of the present invention, for example, a pressure-sensitive adhesive sheet laminated plate material previously peeled off and peeled off from a pressure-sensitive adhesive surface opposite to the surface having a concavo-convex pattern and attached to a transparent plate material such as a glass plate or a synthetic resin plate is used in advance. The laminate can be easily obtained by making it and peeling it off from the release film on the surface of the pressure-sensitive adhesive sheet leaving the uneven pattern on a window material, a display panel or the like.
用途によってはパネルの片面のみならず両面に粘着シート介してパネルを貼ってもよい。得られる積層体の構成例を図4に示す。積層体の層構成は、図5(a)〜(e)に示すように、両面粘着シート1を介して、例えば(a)合成樹脂板4/ガラス板5、(b)合成樹脂板4/合成樹脂板4、(c)ガラス板5/ガラス板5、(d)合成樹脂板4/ガラス板5/合成樹脂板4、(e)ガラス板5/合成樹脂板4/ガラス板5等、種々考えられるが、用途に応じて合成樹脂板4とガラス板5を任意に合わせても問題はない。また、ガラス板、合成樹脂板に限らず、金属板、陶磁器質板、繊維質(紙、木)板等の中から同種あるいは異種の適宜材質を選択して、前記した表面に凹凸加工を施した粘着シートを用いて、本発明方法を適用し、各種積層パネルを得ることができる。   Depending on the application, the panel may be pasted not only on one side of the panel but also on both sides via an adhesive sheet. An example of the structure of the resulting laminate is shown in FIG. As shown in FIGS. 5A to 5E, the layer structure of the laminate is, for example, (a) synthetic resin plate 4 / glass plate 5, (b) synthetic resin plate 4 / Synthetic resin plate 4, (c) glass plate 5 / glass plate 5, (d) synthetic resin plate 4 / glass plate 5 / synthetic resin plate 4, (e) glass plate 5 / synthetic resin plate 4 / glass plate 5, etc. There are various possibilities, but there is no problem even if the synthetic resin plate 4 and the glass plate 5 are arbitrarily combined depending on the application. In addition, not only glass plates and synthetic resin plates, but also suitable materials of the same or different types are selected from metal plates, ceramic plates, fiber (paper, wood) plates, etc. By using the pressure-sensitive adhesive sheet, various laminated panels can be obtained by applying the method of the present invention.
以下、実施例について説明するが、本発明はこれに限定されるものではない。   Hereinafter, although an example is described, the present invention is not limited to this.
アクリル酸エステル共重合体100重量部に対して1,9ノナンジオールジアクリレート0.05重量部、ベンゾフェノン0.15重量部を加えて溶融攪拌して、厚さ75μmと38μmの平滑なシリコーン離型PET(ポリエチレンテレフタレート)フィルムの間に厚さ500μmのシート状に成形した後に、離型PETフィルム越しに高圧水銀ランプを用いて光量1000mJ/cmを表裏から(積算光量2000mJ/cm)照射して紫外線架橋した粘着シートを得た。
この粘着シートの38μm側の離型PETを剥がして、ダイニック社製の「ND加工エンボスシリコーン離型38μmPET」フィルム(截頭角錐を有する菱形の凹凸パターン加工品)をニップロールで貼り替えて片面凹凸粘着シートを得た。
積層する方法として、先ず厚さ5mm×巾500mm×長さ500mmのポリカーボネート(PC)板の片面に、前記片面凹凸粘着シートの平滑な75μm側離型PETフィルムを剥がしてニップロールで積層して凹凸粘着シート付きPC板を準備した。
次いで、上記凹凸粘着シート付きPC板の凹凸面の離型フィルムを全面剥がして、厚さ5mm×巾500mm×長さ500mmのガラス板に、凹凸粘着シート面を介して自重で接触させた。
接触させたガラス板とPC板の3辺端部(端面)を空気を吸い込まないようにテープでシールした後、残り1辺端部から真空ポンプを用いて凹部(凹部によって形成される内部空隙)の空気を真空マノメーターで5kPaを示すまで吸引した状態で吸引端部をシールし、減圧密封して常温で1週間放置してパネル積層体を得た。
なお、前記アクリル酸エステル共重合体の組成は、n−ブチルアクリレート:78.4重量%、2−エチルヘキシルアクリレート:19.6重量%、アクリル酸:2.0重量%を共重合させたもので、アクリル酸エステル共重合体のGPCで測定した分子量及び分子量分布は重量平均分子量(MW):2.27×10、重量平均分子量/数平均分子量(MW/MN):3.6であった。
また、前記凹凸パターン加工した38μm厚さの離型PETフィルムによって賦形した粘着面の凹凸形状は、網目状にパターンが配置されており、凸部の形状は底辺が2mm、頂角70°の平面視菱形状で、凹部の溝巾は0.2mm、凹凸の最大差(Rmax)は20μmであった(図6参照)。
Smooth silicone mold release with a thickness of 75 μm and 38 μm by adding 0.05 parts by weight of 1,9 nonanediol diacrylate and 0.15 parts by weight of benzophenone to 100 parts by weight of acrylic ester copolymer, followed by melting and stirring. After a PET (polyethylene terephthalate) film is formed into a sheet having a thickness of 500 μm, a light amount of 1000 mJ / cm 2 is irradiated from the front and back (integrated light amount 2000 mJ / cm 2 ) using a high-pressure mercury lamp through a release PET film. As a result, an ultraviolet-crosslinked adhesive sheet was obtained.
The release PET on the 38 μm side of this adhesive sheet is peeled off, and the “ND processed embossed silicone release 38 μm PET” film (diamond-shaped uneven pattern processed product with truncated pyramids) made by Dynic is pasted with a nip roll and single-sided uneven adhesive A sheet was obtained.
As a method of laminating, first, a smooth 75 μm side release PET film of the single-sided uneven pressure-sensitive adhesive sheet is peeled off on one side of a polycarbonate (PC) plate having a thickness of 5 mm × width of 500 mm × length of 500 mm, and laminated with a nip roll to form uneven adhesion. A PC board with a sheet was prepared.
Subsequently, the release film on the uneven surface of the PC plate with the uneven pressure-sensitive adhesive sheet was peeled off and brought into contact with a glass plate having a thickness of 5 mm, a width of 500 mm, and a length of 500 mm by its own weight through the uneven pressure-sensitive adhesive sheet surface.
After sealing the glass plate and the PC plate 3 side edges (end face) with tape so that air is not sucked in, the remaining one side edge is recessed with a vacuum pump (internal gap formed by the recess) Was sucked with a vacuum manometer until the pressure was 5 kPa, the suction end was sealed, sealed under reduced pressure, and allowed to stand at room temperature for 1 week to obtain a panel laminate.
The composition of the acrylic acid ester copolymer is obtained by copolymerizing n-butyl acrylate: 78.4% by weight, 2-ethylhexyl acrylate: 19.6% by weight, and acrylic acid: 2.0% by weight. The molecular weight and molecular weight distribution measured by GPC of the acrylate copolymer were weight average molecular weight (MW): 2.27 × 10 6 , weight average molecular weight / number average molecular weight (MW / MN): 3.6. .
Further, the uneven shape of the adhesive surface formed by the 38 μm-thick release PET film processed with the uneven pattern has a mesh pattern, and the convex portion has a base of 2 mm and an apex angle of 70 °. It was rhombus in plan view, the groove width of the recess was 0.2 mm, and the maximum difference (Rmax) of the unevenness was 20 μm (see FIG. 6).
実施例1で用いたものと同じ原材料を同様の配合で溶融攪拌して、実施例1で使用した厚さ75μmの平滑な離型PETフィルムとダイニック社製の「ND加工エンボスシリコーン離型38μmPET」フィルムの間に厚さ500μmのシート状に成形した後に、高圧水銀ランプを用いて光量2000mJ/cmを75μm離型PETフィルム越しに照射して紫外線架橋した片面凹凸粘着シートを得た。
以降、実施例1と同様の積層方法でパネル積層体を得た。
The same raw materials used in Example 1 were melted and stirred in the same composition, and a smooth release PET film having a thickness of 75 μm used in Example 1 and “ND processed embossed silicone release 38 μm PET” manufactured by Dynic Co., Ltd. After forming into a sheet having a thickness of 500 μm between the films, a single-sided concavo-convex pressure-sensitive adhesive sheet was obtained by irradiating a light amount of 2000 mJ / cm 2 through a 75 μm release PET film using a high-pressure mercury lamp.
Thereafter, a panel laminate was obtained by the same lamination method as in Example 1.
実施例1と同じ未架橋のアクリル酸エステル共重合体100重量部に対してアセチルアセトン亜鉛0.5重量部、アセチルアセトンアルミ0.7重量部を加えて溶融攪拌して、厚さ75μmの平滑な離型PETフィルムとダイニック社製の「ND加工エンボスシリコーン離型38μmPET」フィルムの間に厚さ500μmのシート状に成形して片面凹凸粘着シートを得た。その後、高圧水銀ランプを用いて光量2000mJ/cmを75μm離型PETフィルム越しに照射して紫外線架橋した片面凹凸粘着シートを得た。
その後、実施例1と同様の積層方法でパネル積層体を得た。
To 100 parts by weight of the same uncrosslinked acrylate copolymer as in Example 1, 0.5 parts by weight of acetylacetone zinc and 0.7 parts by weight of acetylacetone aluminum were added, melted and stirred, and a smooth separation having a thickness of 75 μm was performed. A single-sided uneven pressure-sensitive adhesive sheet was obtained by forming a sheet having a thickness of 500 μm between a mold PET film and a “ND processed embossed silicone release 38 μm PET” film manufactured by Dynic. Thereafter, a single-sided uneven pressure-sensitive adhesive sheet that was UV-crosslinked by irradiating light of 2000 mJ / cm 2 through a 75 μm release PET film using a high-pressure mercury lamp was obtained.
Thereafter, a panel laminate was obtained by the same lamination method as in Example 1.
〔比較例1〕
実施例1で作製した500μmの粘着シートを、凹凸パターンを賦形(転写)することなく平面状の両面粘着シートとなし、これを用いて実施例1と同様の方法でパネル積層体を得た。なお、保持力のズレ長さについては、この凹凸加工を施していない粘着シートにあっては、上記凹凸加工を施した粘着シートの場合と同じ圧力で接触させての測定とした。
[Comparative Example 1]
The 500 μm pressure-sensitive adhesive sheet produced in Example 1 was formed into a planar double-sided pressure-sensitive adhesive sheet without shaping (transferring) the uneven pattern, and a panel laminate was obtained in the same manner as in Example 1 using this. . In addition, about the shift | offset | difference length of holding force, in the adhesive sheet which has not performed this uneven | corrugated process, it was set as the measurement made to contact with the same pressure as the case of the adhesive sheet which gave the said uneven | corrugated process.
〔比較例2〕
実施例2と同様に、厚さ75μmの平滑な離型PETフィルムとダイニック社製の「ND加工エンボスシリコーン離型38μmPET」フィルムの間に厚さ500μmのシート状に成形した後に、高圧水銀ランプを用いて光量2000mJ/cmを75μm離型PETフィルム越しに照射し、これに加えてさらにダイニック社製の「ND加工エンボスシリコーン離型38μmPET」フィルム越しに高圧水銀ランプを用いて光量1000mJ/cmを照射して紫外線架橋した片面凹凸粘着シートを得た。その後、実施例1と同様の積層方法でパネル積層体を得た。
[Comparative Example 2]
In the same manner as in Example 2, after molding into a sheet having a thickness of 500 μm between a smooth release PET film having a thickness of 75 μm and a “ND processed embossed silicone release 38 μm PET” film made by Dynic, a high pressure mercury lamp was formed. using a light amount 2000 mJ / cm 2 was irradiated to 75μm release PET film over, the amount of light 1000 mJ / cm 2 using a high-pressure mercury lamp was further added Dynic Co. "ND machining embossed silicone release 38μmPET" a film over the thereto To obtain a single-sided uneven pressure-sensitive adhesive sheet which was UV-crosslinked. Thereafter, a panel laminate was obtained by the same lamination method as in Example 1.
〔比較例3〕
実施例1と同様にして得られた片面凹凸粘着シートを用い、積層する方法として、先ず厚さ5mm×巾500mm×長さ500mmのPC板の片面に該凹凸粘着シートの、厚さ75μmの平滑な離型PETフィルムを剥がしてニップロールで積層して凹凸粘着シート付きPC板を準備した。
次いで、上記凹凸粘着シート付きPC板の凹凸面の離型フィルムを全面剥がして、厚さ5mm×巾500mm×長さ500mmのガラス板に、凹凸粘着シート面を介して自重で接触させて常温で1週間放置してパネル積層体を得た。
[Comparative Example 3]
As a method of laminating using the single-sided uneven pressure-sensitive adhesive sheet obtained in the same manner as in Example 1, first, the uneven pressure-sensitive adhesive sheet was smoothed to a thickness of 75 μm on one side of a PC plate having a thickness of 5 mm × width of 500 mm × length of 500 mm. The release PET film was peeled off and laminated with a nip roll to prepare a PC board with an uneven pressure-sensitive adhesive sheet.
Next, the release film on the concavo-convex surface of the PC board with the concavo-convex adhesive sheet is peeled off entirely and brought into contact with a glass plate having a thickness of 5 mm × width 500 mm × length 500 mm by its own weight through the concavo-convex adhesive sheet surface at room temperature. A panel laminate was obtained by leaving for 1 week.
以上の実施例及び比較例で得られたPC板/ガラス板のパネル積層体について、使用した粘着シートの保持力のズレ長さを測定するとともに、貼り合わせた外観(合わせ外観)を目視で観察して評価した。その結果を表1に示す。
外観観察(合わせ外観):凹凸パターンの消失、気泡なし及び剥離なしを「○」とした。
表1の結果に示すように、本発明に係るパネルの積層方法によれば、貼り合わせた外観の優れたパネル積層体が得られる。
About the panel laminated body of PC board / glass board obtained by the above Example and comparative example, while measuring the shift | offset | difference length of the holding force of the adhesive sheet used, the bonded external appearance (matching external appearance) was observed visually. And evaluated. The results are shown in Table 1.
Appearance observation (combined appearance): “O” indicates the disappearance of the uneven pattern, no bubbles, and no peeling.
As shown in the results of Table 1, according to the method for laminating panels according to the present invention, a panel laminate having an excellent bonded appearance can be obtained.
本発明に係るパネルの積層方法を例示する説明図である。It is explanatory drawing which illustrates the lamination | stacking method of the panel which concerns on this invention. 本発明に係るパネルの積層方法を例示する説明図である。It is explanatory drawing which illustrates the lamination | stacking method of the panel which concerns on this invention. 粘着シートの構成を例示する断面図である。It is sectional drawing which illustrates the structure of an adhesive sheet. 粘着シートの凹凸パターンを例示する平面図である。It is a top view which illustrates the uneven | corrugated pattern of an adhesive sheet. パネル積層体の構成例を示す例示する断面図である。It is sectional drawing which illustrates the structural example of a panel laminated body. 粘着シートの凹凸パターンの構成を説明するもので、(a)は凹凸パターンの断面図、(b)は凹凸パターンの平面図である。The structure of the uneven | corrugated pattern of an adhesive sheet is demonstrated, (a) is sectional drawing of an uneven | corrugated pattern, (b) is a top view of an uneven | corrugated pattern.
符号の説明Explanation of symbols
A,B パネル
1 粘着シート
2 平滑な離型フィルム
3 凹凸パターンを賦形した離型フィルム
4 合成樹脂板
5 ガラス板
10 テープ等の治具
20 吸引装置
A, B Panel 1 Adhesive sheet 2 Smooth release film 3 Release film shaped uneven pattern 4 Synthetic resin plate 5 Glass plate 10 Jig such as tape 20 Suction device

Claims (2)

  1. シート状あるいは板状のパネル同士を粘着シートを介して積層してパネル積層体を製造するにあたり、
    表面に凹凸加工を施した柔軟な粘着シートとして、ガラス転移点が−20℃以下、かつ保持力のズレ長さが1.0〜13mmである粘着シートを用い、積層されるパネルと粘着シートの凸部とを接触させ、粘着シートの凹部によって形成される内部空隙の空気を吸引してその内部空隙を減圧状態で密封した後、減圧密封状態のまま大気圧下に1〜7日間放置することで内部空隙を消失させてパネルと粘着シートとを密着させることにより、パネル積層体を得ることを特徴とするパネル積層体の製造方法。
    In producing a panel laminate by laminating sheet-like or plate-like panels via an adhesive sheet,
    As a flexible pressure-sensitive adhesive sheet having an uneven surface, a pressure-sensitive adhesive sheet having a glass transition point of −20 ° C. or less and a holding power shift length of 1.0 to 13 mm is used. Contact the convex part, suck the air in the internal gap formed by the concave part of the pressure-sensitive adhesive sheet, seal the internal gap in a reduced pressure state, and leave it under reduced pressure in an atmospheric pressure for 1 to 7 days A method for producing a panel laminate, wherein a panel laminate is obtained by eliminating internal voids and bringing the panel and the adhesive sheet into close contact with each other.
  2. パネルの周囲をその一部を残してシールし、残した一部から吸引装置を用いて前記内部空隙の空気を吸引してその内部空隙を減圧状態で密封することを特徴とする請求項1に記載のパネル積層体の製造方法。   2. The panel is sealed by leaving a part of the periphery of the panel, and suctioning air from the remaining part using a suction device to seal the internal cavity in a reduced pressure state. The manufacturing method of the panel laminated body of description.
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