JPS5956429A - Metallizing of plastic film - Google Patents

Abstract

PURPOSE:To prevent a film from being wrinkled during metalling, by laminating a thick film with a thin film to be metallized through a thermoplastic resin and, after dry plating, peeling the films from each other. CONSTITUTION:A composite film is prepared by laminating a plastic film, 50- 200mu thick, with a plastic film to be metallized, several -50mu thick (e.g., polyester film), through a thermoplastic resin (e.g., PE), several - several hundreds mu thick. This composite film is subjected to dry plating such as vacuum deposition, ion plating or sputtering, and then the plastic films are separated from each other. It is thus possible to bond the films without forming bubbles or wrinkles, to prevent the films from being deformed during metallizing and to peel only the metallized film easily after metallizing.

Description

【発明の詳細な説明】 真空蒸着、イオンブレーティング及びスパッタにより数
μから関μ程度までの薄いグラスチックフィルムに連続
的に金属、合金、金属化合物をコーティングした素材は
、コンデンサーフィルム、磁気テープ及び音響振動板等
の広い用途があり、実際に各種の方法により生産され、
使用されている。Detailed Description of the Invention Materials in which metals, alloys, and metal compounds are continuously coated on thin glass films of several microns to several microns by vacuum evaporation, ion blating, and sputtering can be used as capacitor films, magnetic tapes, and It has a wide range of uses such as acoustic diaphragms, and is actually produced using various methods.
It is used.

現在性なわれている方法は、真空室内に薄いフィルムを
走行させるだめのロール系を設け、この一部にて蒸着ま
たはスフ４’ツタ等のコーティングを行なっている。こ
の場合装置のロール系にはきびしい性能が要求される。In the current method, a roll system for running a thin film is provided in a vacuum chamber, and a part of the roll system is vapor-deposited or coated with 4' ivy or the like. In this case, strict performance is required of the roll system of the device.

すなわち、フィルムの走行に対してはテンションが出来
る限り小さく、均一で、しわの発生がなく、蛇行せず、
蒸着時の伸びを吸収できる様なロール系でなくてはなら
ない。In other words, the tension is as small as possible for the running of the film, it is uniform, there are no wrinkles, there is no meandering,
The roll system must be able to absorb the elongation during vapor deposition.

そのためには装置のロール系において、各ロール間の平
行度を厳密にし、ロール間隔を極力小さくし、蛇行を防
止するための制御装置を取りつけ、蒸着時に熱を受け、
伸びた分を吸収する機構を備えなくてはならない。また
しわの発生を防止する機構も必要である。To achieve this, in the roll system of the equipment, the parallelism between each roll should be made strict, the distance between the rolls should be made as small as possible, a control device should be installed to prevent meandering, and heat should be applied during vapor deposition.
A mechanism must be provided to absorb the elongation. A mechanism is also required to prevent wrinkles from forming.

この様な装置を作製することは可能であり、現実に存在
するが、価格が非常に高くなり、これが製品コストにの
せられるため、この点が種々の新しい機能を有した蒸着
フィルムの工業化の難点になっている。Although it is possible to create such a device, and it actually exists, the price is extremely high, and this is added to the product cost, which is a difficult point in the industrialization of vapor-deposited films with various new functions. It has become.

一般に連続蒸着製品の開発には設備費の要因が大きく影
響し、生産量が非常に多いもの又は価格が非常に高いも
の以外は採算の面で開発がむづかしい。更に薄いフィル
ムを蒸着する装置となると、設備費がさらに上昇し、開
発には大きなリスクを伴なうことになる。したがって何
らかの方法で設備費を安くすることが望まれる。本発明
者らは、これらの点を解決するために種々研究し、本発
明をなすに至った。In general, the development of continuous vapor deposition products is greatly influenced by equipment costs, and unless the production volume is extremely large or the price is extremely high, development is difficult from a profitability standpoint. Equipment for depositing even thinner films would further increase equipment costs and involve greater risks in development. Therefore, it is desirable to reduce equipment costs in some way. The present inventors conducted various studies to solve these problems, and came up with the present invention.

つまり装置を簡略化するためには、まずロール系及びそ
の制御系を簡略化しなくてはならない。In other words, in order to simplify the device, the roll system and its control system must first be simplified.

そのためには薄いフィルムを他のフィルムにより補強し
、簡単な装置でも走行可能とし、蒸着後に補強用フィル
ムを剥離するという方法が本発明の目的に合致すること
を見い出した。For this purpose, we have found that a method of reinforcing a thin film with another film to make it runnable even with a simple device, and peeling off the reinforcing film after vapor deposition, meets the purpose of the present invention.

そこで種々の接着剤を用い、薄いフィルムを比較的厚い
フィルムに接着する方法を試みたが、接着時にしわが発
生したり、蒸着後薄いフィルムを剥離する場合に変形及
びしわが発生し、良い結果は得られなかった。Therefore, attempts were made to bond thin films to relatively thick films using various adhesives, but wrinkles occurred during bonding, and deformation and wrinkles occurred when peeling off the thin film after vapor deposition, resulting in poor results. was not obtained.

そこで、熱可塑性樹脂を間にはさみ、ラミネートするこ
とにより、厚いフィルムと薄いフィルムを接着する方法
をとったところ良好な結果を得ることができた。Therefore, we adopted a method of adhering the thick and thin films by sandwiching a thermoplastic resin between them and laminating them, and we were able to obtain good results.

つまり、接着層となる熱可塑性樹脂を押出しながら両側
にフィルムをラミネートしていく方法である。In other words, the method involves laminating films on both sides while extruding the thermoplastic resin that will serve as the adhesive layer.

この場合、蒸着に用いられる蒸着用の薄いフィルムは、
厚さ関μ以下のものをいい、ポリエステル、ポリプロピ
レン、ポリサルフオン、ポリエーテルサルフオン、ポリ
イミド等の広範囲の樹脂からなるフィルムの使用が可能
であり、補強用に用いられるフィルムは安価なフィルム
が望ましい。In this case, the thin film used for vapor deposition is
It refers to a film having a thickness of less than 10 μm, and it is possible to use a film made of a wide range of resins such as polyester, polypropylene, polysulfone, polyethersulfone, polyimide, etc., and it is desirable that the film used for reinforcement be an inexpensive film.

補強用フィルムの厚さは、効果的な厚さとして関〜２０
０μが好ましい。The thickness of the reinforcing film is approximately 20% as an effective thickness.
0μ is preferred.

次に薄いフィルムと補強フィルムとを張り合せるだめの
中材用樹脂としては、押出しラミネートが可能で、薄い
蒸着用フィルムと補強フィルムとを接着することが可能
な樹脂がよく、ポリエチレン、酢酸ビニル、プリエチレ
ン酢酸ビニル共重合体、末端に官能基を有するポリオレ
フィン等が用いられる。Next, as the resin for the inner material of the container for laminating the thin film and the reinforcing film, resins that are capable of extrusion lamination and that can bond the thin vapor deposition film and the reinforcing film are preferred, such as polyethylene, vinyl acetate, Pre-ethylene vinyl acetate copolymer, polyolefin having a functional group at the end, etc. are used.

この場合、補強フィルム、中材及び蒸着フィルムの種々
の素材から生ずる組合せにおいては、接着性がそれぞれ
異なるため、実用上は中材−蒸着フィルム間よりも補強
フィルム−中材間の接着力が強くなる様な組合せを選ば
なくてはならない。In this case, since the adhesion properties of the reinforcing film, filling material, and vapor-deposited film are different in combinations made from various materials, in practice, the adhesive force between the reinforcing film and the filling material is stronger than that between the filling material and the vapor-deposited film. You have to choose a combination that will work.

つまり、補強フィルム−中材間の接着性が中材−蒸着フ
ィルム間の接着力より弱い場合は、剥離暗中材が蒸着フ
ィルム側に付着するため不都合である。これを素材の組
合せにより改良できない場合には、補強フィルム側に有
機チタンなどのアンカー剤をコーティングしておき接着
性を高めることも可能である。中材の厚さは数μから数
百ミクロンが適当であるが、目的とする性能が保証され
る限り薄い方がよく、数μから（９）μが好ましい。In other words, if the adhesive strength between the reinforcing film and the interlayer is weaker than the adhesive force between the interlayer and the vapor-deposited film, this is disadvantageous because the peelable interlayer will adhere to the vapor-deposited film side. If this cannot be improved by combining materials, it is also possible to coat the reinforcing film with an anchoring agent such as organic titanium to improve adhesion. The thickness of the inner material is suitably from several micrometers to several hundred micrometers, but as long as the desired performance is guaranteed, the thinner the material, the better, and the thickness from several micrometers to (9) micrometers is preferable.

ここで目的とする性能とは、蒸着フィルムと補強フィル
ムを、気泡やしわがなく接着することができ、蒸着時に
変形を生ずることなく、蒸着後は蒸着フィルムだけを容
易に剥離することができること等をさす。The desired performance here is that the vapor-deposited film and the reinforcing film can be bonded together without bubbles or wrinkles, and that only the vapor-deposited film can be easily peeled off after vapor deposition without deformation during vapor deposition. point to

以上説明したごとく、本願の方法によれば簡略された安
価な連続蒸着装置にて、薄いフィルムに蒸着することが
でき、その結果薄いプラスチックフィルムをペースにし
た新しい機能性蒸着膜の工業的な展開が容易になった。As explained above, according to the method of the present application, thin films can be deposited using a simple and inexpensive continuous deposition apparatus, and as a result, new functional deposited films based on thin plastic films can be industrially developed. has become easier.

以下実施例にて更に詳しく説明する。This will be explained in more detail in Examples below.

実施例１ 関μ厚のポリプロピレンフィルムを補強フィルムとし、
ｌＯμ厚のポリエステルフィルムを蒸着フィルムとし、
中層をポリエチレンとし、押出しラミネートすることに
より３層フィルムを作製した。Example 1 A polypropylene film with a thickness of 100 μm is used as a reinforcing film,
A polyester film with a thickness of lOμ is used as a vapor-deposited film,
A three-layer film was produced by extrusion lamination using polyethylene as the middle layer.

蒸着装置は最長ロール間隔が１ｍあり、ロールの平行度
もかなり悪く、１０μ厚のフィルムは全く通すことので
きない状態であったが、作製した３層フィルムは支障な
く通すことができ、Ｏｕを１００　ｍ連続蒸着した。そ
の結果３層フィルムはシワを発生することなく、約１ｏ
ｏｏ　１の厚さに均一に蒸着することができた。次に、
このフィルムを巻取り機にかけ１０μ厚のｆリエステル
フイルムと犯μ厚のＩリプロピレンフィルムを別々に巻
取りながら補強フィルムと中層を剥離したところ、剥離
時のビ−ル強度は約１００９７ｃｍであり、剥離時あま
り力を必要とせず、したがってフィルムをいためること
なく蒸着されたポリエステルフィルムのみをきれいに巻
取ることができた。The maximum distance between the rolls of the vapor deposition equipment was 1m, and the parallelism of the rolls was also quite poor, making it impossible to pass a 10μ thick film through it at all.However, the three-layer film that was produced could be passed through it without any problems, and the Ou 100 m continuous vapor deposition. As a result, the 3-layer film has no wrinkles and is approximately 10cm thick.
It was possible to uniformly deposit the film to a thickness of 1.0 mm. next,
When this film was put on a winder and the reinforcing film and the middle layer were peeled off while separately winding up the 10 μ thick F polyester film and the thick I polypropylene film, the beer strength at the time of peeling was approximately 10097 cm. Not much force was required during peeling, and therefore only the vapor-deposited polyester film could be wound up neatly without damaging the film.

実施例２ ５０μ厚のポリプロピレンフィルムを補強フィルムとし
、１２．５μ厚のポリイミドフィルムを蒸着フィルムト
シ、ポリエチレン酢酸ビニル共重合体を中層とし、押出
しラミネート法により３層フィルムを作製した。この場
合中層の厚さは約１０μであった。この様にして得られ
た複合フィルムのポリイミド側にアルミニウムを０．３
μ蒸着した。蒸着に用いた装置は実施例１の装置と同じ
であり、ロールの平行度も悪く、最長ロール間隔が１ｍ
もあり、１２．５μのポリイミドフィルムは走行不可能
であったが、ポリプロピレンフィルムで補強した複合フ
ィルムでは蛇行、しわ等を発生せず、正常に走行し、良
好なる蒸着複合フィルムを得ることができた。Example 2 A three-layer film was produced by extrusion lamination using a 50 μm thick polypropylene film as a reinforcing film, a 12.5 μm thick polyimide film as a vapor-deposited film top, and a polyethylene vinyl acetate copolymer as an intermediate layer. In this case the thickness of the middle layer was approximately 10 microns. 0.3% of aluminum was added to the polyimide side of the composite film obtained in this way.
μ evaporated. The equipment used for vapor deposition was the same as the equipment used in Example 1, and the parallelism of the rolls was poor, and the longest distance between the rolls was 1 m.
However, the composite film reinforced with polypropylene film ran normally without meandering or wrinkles, and a good vapor-deposited composite film could be obtained. Ta.

次に、実施例１と同様にして、蒸着されたポリイミドフ
ィルムと補強フィルムであるチリプロピレンフィルムを
剥離したところ、支障なく剥離でき、良好なるアルミ蒸
着ポリイミドフィルムを得ることができた。Next, in the same manner as in Example 1, the vapor-deposited polyimide film and the reinforcing film, ie, the chilipropylene film, were peeled off without any problem, and a good aluminum vapor-deposited polyimide film was obtained.

Claims (1)

【特許請求の範囲】[Claims] 数μから関μの厚さのプラスチックフィルムを他の厚い
プラスチックフィルムに熱可塑性樹脂を介してラミネー
トした複合フィルムとし、真空蒸着、イオンブレーティ
ング又はスノクツタ等の乾、　　式メッキを施した後、
両プラスチックフィルムを剥離することを特徴とする薄
いグラスチックフィルムの蒸着方法。A composite film is created by laminating a plastic film with a thickness of several μ to about 100 μm to another thick plastic film via a thermoplastic resin, and after dry plating such as vacuum deposition, ion blating, or snow plating,
A method for depositing a thin glass film, characterized by peeling off both plastic films.