JP2006341170A - Method for applying coating liquid to plastic film comprising vapor-deposited inorganic compound - Google Patents

Method for applying coating liquid to plastic film comprising vapor-deposited inorganic compound Download PDF

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JP2006341170A
JP2006341170A JP2005167935A JP2005167935A JP2006341170A JP 2006341170 A JP2006341170 A JP 2006341170A JP 2005167935 A JP2005167935 A JP 2005167935A JP 2005167935 A JP2005167935 A JP 2005167935A JP 2006341170 A JP2006341170 A JP 2006341170A
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vapor
inorganic compound
plastic film
thin film
deposited
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JP4956920B2 (en
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Fumitake Koizumi
文剛 小泉
Tomokimi Nakanishi
智公 中西
Hiroshi Suzuki
浩 鈴木
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Toppan Inc
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Toppan Printing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for applying a coating liquid for forming an overcoat layer to a plastic film comprising a vapor-deposited inorganic compound without causing a crack on a vapor-deposited thin film layer. <P>SOLUTION: A web of the plastic film (20) having the vapor-deposited thin film layer (21) formed by vapor-depositing the inorganic compound is unwound from an unwinding part (11) and the unwound web is sent to a coating part (13) by a suction roll (12) to apply the coating liquid (22) continuously onto the vapor-deposited thin film layer-formed surface of the plastic film. Alternatively, the web of the plastic film (20) having the vapor-deposited thin film layer (21) formed by vapor-depositing the inorganic compound is unwound from the unwinding part (11), the unwound web is sent to a coating part (13) to apply the coating liquid (22) continuously onto the vapor-deposited thin film layer-formed surface and the coating liquid-applied web is sent to a drying part (15) by the suction roll (12). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、無機化合物蒸着プラスチックフィルムへの塗布液の塗布方法に関するものであり、特には、蒸着薄膜層にクラックを発生させる可能性の少ない塗布液の塗布方法に関する。   The present invention relates to a method for applying a coating solution to an inorganic compound vapor-deposited plastic film, and more particularly to a method for applying a coating solution that is less likely to cause cracks in a deposited thin film layer.

近年、食品や医薬品等の包装に用いられる包装材料は、内容物の変質、特に食品においてはたんぱく質や油脂等の酸化、変質を抑制し、さらに味、鮮度を保持するために、また、無菌状態の取扱いが必要とされる医薬品においては、有効成分の変質を抑制し効能を維持するために、包装材料を透過する酸素、水蒸気、その他内容物を変質させる気体による影響を防止する必要があり、これら気体を遮断するガスバリア性を備えることが求められている。   In recent years, packaging materials used for the packaging of foods and pharmaceuticals, etc. have been improved in order to suppress the alteration of the contents, especially the oxidation and alteration of proteins and fats and oils in food, and to maintain the taste and freshness, as well as in a sterile state. In order to suppress the alteration of the active ingredient and maintain its efficacy, it is necessary to prevent the influence of oxygen, water vapor, and other gases that alter the contents of the packaging material. It is required to have a gas barrier property that blocks these gases.

そのため、従来からポリビニルアルコール、エチレンビニルアルコール共重合体、あるいはポリ塩化ビニリデン樹脂など一般にガスバリア性が比較的高いといわれる高分子樹脂組成物をラミネートまたはコーティングによりガスバリア性積層体として包装材料に用いた包装フィルムが一般に用いられてきた。   Therefore, packaging using a polymer resin composition that is generally said to have a relatively high gas barrier property such as polyvinyl alcohol, ethylene vinyl alcohol copolymer, or polyvinylidene chloride resin as a gas barrier laminate as a packaging material by laminating or coating. Film has been commonly used.

また、最近では、一軸ないし二軸延伸されたポリエステルフィルム、ポリアミドフィルム、ポリオレフィンフィルムなどの延伸フィルム上に、酸化アルミニウムや酸化ケイ素などの無機化合物の薄膜を物理蒸着あるいは化学蒸着などの蒸着法により20〜100nm程度の厚さに設けた無機化合物蒸着プラスチックフィルムも一般的に使用されている。   Recently, a thin film of an inorganic compound such as aluminum oxide or silicon oxide is deposited on a stretched film such as a uniaxially or biaxially stretched polyester film, polyamide film or polyolefin film by a vapor deposition method such as physical vapor deposition or chemical vapor deposition. An inorganic compound vapor-deposited plastic film having a thickness of about ˜100 nm is also generally used.

ところで、この無機化合物蒸着プラスチックフィルムは、ガスバリア層に用いられる無機化合物の蒸着薄膜層が可撓性に欠けるため、揉みや折り曲げ等の物理的な衝撃に弱く、取扱いに注意を要し、特に印刷、ラミネートなど包装材料の後加工の際に、蒸着薄膜層にクラックが発生し易くガスバリア性を低下させるという問題を有している。   By the way, this inorganic compound vapor-deposited plastic film is weak in physical impact such as stagnation and bending because the inorganic compound vapor-deposited thin film layer used for the gas barrier layer lacks flexibility. In the post-processing of a packaging material such as a laminate, there is a problem that cracks are likely to occur in the deposited thin film layer and the gas barrier property is lowered.

この問題を解決する一つの方法として蒸着薄膜層の上にグラビア塗工機等でオーバーコート層を塗布する方法がある。この場合にも蒸着薄膜層に如何にクラック等の傷を付けずにオーバーコート層を塗布することができるかが、バリア性を保持できるかのポイントとなる。   One method for solving this problem is to apply an overcoat layer on the deposited thin film layer with a gravure coater or the like. In this case as well, the key point is whether or not the overcoat layer can be applied to the vapor-deposited thin film layer without causing scratches such as cracks.

通常の塗工機では、特に高速塗工する機械で、塗工部にいたる前に基材フィルムの張力を制御するためインフィードロールと呼ばれるロールが設置されている。このインフィードロールは、基材フィルムをニップしてその前後の部分で張力をカットすることで、その前後部分のフィルム張力を個別に制御するものである。また、インフィードロールとサクションロールの両方が設置されている(例えば、特許文献1参照)。   In an ordinary coating machine, a roll called an infeed roll is installed in order to control the tension of the base film before reaching the coating section, particularly in a machine that performs high-speed coating. This infeed roll controls the film tension of the front and back portions individually by niping the base film and cutting the tension at the front and back portions. Moreover, both the infeed roll and the suction roll are installed (for example, refer patent document 1).

上記先行技術文献を示す。
特開平2003−191215号公報。
The said prior art document is shown.
JP-A-2003-191215.

しかし、インフィードロールを用いることにより、基材フィルムを挟み込む状態になるため、基材フィルムの表面速度とロール回転速度は極力同速度に制御されているものの、可撓性に弱い蒸着薄膜層にダメージを与えてしまう可能性が高い。   However, since the base film is sandwiched by using the infeed roll, the surface speed of the base film and the rotation speed of the roll are controlled to the same speed as much as possible. There is a high possibility of damaging.

本発明は、無機化合物蒸着プラスチックフィルムの蒸着薄膜層の上にオーバーコート層を形成させるための塗布液を塗布する方法に関する以上のような問題に鑑みてなされたもので、蒸着薄膜層にクラックを発生させずに無機化合物蒸着プラスチックフィルムへオーバーコート層を形成させるための塗布液を塗布する方法を提供することを課題とする。   The present invention has been made in view of the above problems related to the method of applying a coating solution for forming an overcoat layer on a vapor-deposited thin film layer of an inorganic compound vapor-deposited plastic film. It is an object of the present invention to provide a method for applying a coating solution for forming an overcoat layer on an inorganic compound vapor-deposited plastic film without generating the same.

本発明の請求項1の発明は、蒸着薄膜層を有する無機化合物蒸着プラスチックフィルムのウェブを巻き出し部より巻き出し、巻き出されたウェブをサクションロールにより塗工部に送り、蒸着薄膜層面に塗布液を連続して塗布することを特徴とする、無機化合物蒸着プラスチックフィルムへの塗布液の塗布方法である。   According to the first aspect of the present invention, the web of an inorganic compound vapor-deposited plastic film having a vapor-deposited thin film layer is unwound from the unwinding portion, and the unwound web is fed to the coating portion by a suction roll and applied to the surface of the vapor-deposited thin film layer. A method for applying a coating liquid onto an inorganic compound vapor-deposited plastic film, wherein the liquid is continuously applied.

なお、サクションロールとは、ロールの内部を排気ブロワーに接続し、排気するとロールの表面に配されたメッシュのような小孔より吸引される。このロールに接した無機化合物蒸着プラスチックフィルムはこの吸引力によりロールに吸着して、あたかもニップロールで行うようなフィルム速度制御ができる。これによりサクションロール前後のフィルム張力を個別に制御する。   The suction roll is sucked through a small hole such as a mesh arranged on the surface of the roll when the inside of the roll is connected to an exhaust blower and exhausted. The inorganic compound vapor-deposited plastic film in contact with the roll is adsorbed to the roll by this suction force, and the film speed can be controlled as if it were performed by a nip roll. Thereby, the film tension before and after the suction roll is individually controlled.

このように請求項1記載の発明によれば、蒸着薄膜層を有する無機化合物蒸着プラスチックフィルムのウェブを巻き出し部より巻き出し、巻き出されたウェブをサクションロールにより塗工部に送り、蒸着薄膜層面に塗布液を連続して塗布するので、蒸着薄膜層はウェブを巻き出し部から塗工部まで無機化合物蒸着プラスチックフィルムを一度も挟み込むことをせずに塗布液を塗布することができ、蒸着薄膜層がダメージを受けることがない。   Thus, according to the first aspect of the present invention, the web of the inorganic compound vapor-deposited plastic film having the vapor deposition thin film layer is unwound from the unwinding portion, and the unwound web is sent to the coating portion by the suction roll. Since the coating liquid is continuously applied to the layer surface, the vapor deposition thin film layer can be applied without the need to sandwich the inorganic compound vapor-deposited plastic film from the unwinding part to the coating part. The thin film layer is not damaged.

また、請求項2の発明は、蒸着薄膜層を有する無機化合物蒸着プラスチックフィルムのウェブを巻き出し部より巻き出し、巻き出されたウェブを塗工部に送り、蒸着薄膜層面に塗布液を連続して塗布し、塗布液が塗布されたウェブをサクションロールにより乾燥部に送ることを特徴とする、無機化合物蒸着プラスチックフィルムへの塗布液の塗布方法である。   Further, the invention of claim 2 unwinds the web of the inorganic compound vapor-deposited plastic film having the vapor-deposited thin film layer from the unwinding part, sends the unwound web to the coating part, and continuously applies the coating liquid to the vapor-deposited thin film layer surface. The coating liquid is applied to the inorganic compound vapor-deposited plastic film, wherein the web coated with the coating liquid is sent to the drying section by a suction roll.

このように請求項2記載の発明によれば、蒸着薄膜層を有する無機化合物蒸着プラスチックフィルムのウェブを巻き出し部より巻き出し、巻き出されたウェブを塗工部に送り、蒸着薄膜層面に塗布液を連続して塗布し、塗布液が塗布されたウェブをサクションロールにより乾燥部に送るので、無機化合物蒸着プラスチックフィルムを一度も挟み込むことなく無機化合物蒸着プラスチックフィルムのウェブを塗工部から乾燥部に送ることができ、蒸着薄膜層がダメージを受けることがない。   Thus, according to invention of Claim 2, the web of the inorganic compound vapor deposition plastic film which has a vapor deposition thin film layer is unwound from an unwinding part, the unwound web is sent to a coating part, and it applies to a vapor deposition thin film layer surface Since the liquid is continuously applied and the web coated with the coating liquid is sent to the drying section by a suction roll, the inorganic compound vapor-deposited plastic film web is transferred from the coating section to the drying section without any sandwich of the inorganic compound vapor-deposited plastic film. The deposited thin film layer is not damaged.

このように本発明の無機化合物蒸着プラスチックフィルムへの塗布液の塗布方法によれば、巻き出しから塗工部までニップロールを全く通さずに送ることにより、フィルムの表面層に積層した蒸着薄膜層に全幅にわたって一切ダメージを与えず、バリア性を保持できる。   Thus, according to the coating method of the coating liquid to the inorganic compound vapor-deposited plastic film of the present invention, the vapor deposition thin film layer laminated on the surface layer of the film is sent from the unwinding to the coating part without passing through the nip roll at all. Barrier properties can be maintained without causing any damage over the entire width.

本発明を一実施形態に基づいて以下に詳細に説明する。
本発明の無機化合物蒸着プラスチックフィルムへの塗布液の塗布方法は、例えば、図1に示すように、蒸着薄膜層(21)を有する無機化合物蒸着プラスチックフィルム(20)のウェブを巻き出し部(11)より巻き出し、巻き出されたウェブをサクションロール(12)により塗工部(13)に送り、蒸着薄膜層面に塗布液(22)を連続して塗布する
ことを特徴とする、無機化合物蒸着プラスチックフィルムへの塗布液の塗布方法である。
The present invention will be described in detail below based on one embodiment.
The coating method of the coating liquid onto the inorganic compound vapor-deposited plastic film of the present invention includes, for example, as shown in FIG. 1, a web of an inorganic compound vapor-deposited plastic film (20) having a vapor-deposited thin film layer (21). ), The web unwound is fed to the coating part (13) by the suction roll (12), and the coating liquid (22) is continuously applied to the surface of the deposited thin film layer. This is a method of applying a coating solution to a plastic film.

また、例えば、図2に示すように、蒸着薄膜層(21)を有する無機化合物蒸着プラスチックフィルム(20)のウェブを巻き出し部(11)より巻き出し、巻き出されたウェブを塗工部(13)に送り、蒸着薄膜層面に塗布液(22)を連続して塗布し、塗布液が塗布されたウェブをサクションロール(14)により乾燥部(15)に送ることを特徴とする、無機化合物蒸着プラスチックフィルムへの塗布液の塗布方法である。   For example, as shown in FIG. 2, the web of the inorganic compound vapor deposition plastic film (20) which has a vapor deposition thin film layer (21) is unwound from an unwinding part (11), and the unwound web is applied to the coating part ( 13), the coating liquid (22) is continuously applied to the surface of the deposited thin film layer, and the web coated with the coating liquid is sent to the drying section (15) by the suction roll (14). It is a coating method of the coating liquid to a vapor deposition plastic film.

無機化合物蒸着プラスチックフィルム(20)は、例えば、基材フィルム(25)となる一軸ないし二軸延伸されたポリエチレンテレフタレートフィルム、ポリアミドフィルム、ポリオレフィンフィルムなどの延伸フィルム上に、酸化アルミニウムや酸化ケイ素などの無機化合物の薄膜(21)を物理蒸着あるいは化学蒸着などの蒸着法により20〜100nm程度の厚さに設けたものを使用する。   The inorganic compound vapor-deposited plastic film (20) is formed of, for example, aluminum oxide or silicon oxide on a stretched film such as a uniaxially or biaxially stretched polyethylene terephthalate film, a polyamide film, or a polyolefin film to be the base film (25). A thin film (21) of an inorganic compound provided with a thickness of about 20 to 100 nm by a vapor deposition method such as physical vapor deposition or chemical vapor deposition is used.

また、塗工部(13)での塗布液の塗布方法は、オフセット印刷法、グラビア印刷法、シルクスクリーン印刷法等の周知の印刷方式や、ロールコート法、ナイフエッジコート法、グラビアコート法等の周知の塗布方式を用いることができる。   Moreover, the coating method of the coating liquid in the coating part (13) is known printing methods such as offset printing method, gravure printing method, silk screen printing method, roll coating method, knife edge coating method, gravure coating method, etc. The well-known coating method can be used.

以下実施例により本発明を詳細に説明する。   Hereinafter, the present invention will be described in detail by way of examples.

基材フィルム(25)として厚さ12μmの二軸延伸されたポリエチレンテレフタレートフィルムを準備した。
この基材フィルム(25)の片面に電子線加熱方式による真空蒸着装置により、金属アルミニウムを蒸発させそこに酸素ガスを導入し、厚さ30nmの酸化アルミニウムを蒸着して蒸着薄膜層(21)を形成させ、無機化合物蒸着プラスチックフィルム(20)とした。
A biaxially stretched polyethylene terephthalate film having a thickness of 12 μm was prepared as a base film (25).
On one side of this base film (25), a vacuum deposition apparatus using an electron beam heating method is used to evaporate metal aluminum, introduce oxygen gas therein, deposit aluminum oxide having a thickness of 30 nm, and form a deposited thin film layer (21). An inorganic compound vapor-deposited plastic film (20) was formed.

こうして作製した無機化合物蒸着プラスチックフィルム(20)のウェブをグラビア塗工機の巻き出し部(11)にセットした。   The web of the inorganic compound vapor-deposited plastic film (20) thus produced was set on the unwinding part (11) of the gravure coating machine.

巻き出されたウェブはサクションロール(12)により塗工部(13)に送られ、蒸着薄膜層(21)の上にオーバーコート層(22)となる塗布液を連続して塗布して乾燥部(図示せず)を経て巻き取り部(16)に巻き取って、無機化合物蒸着プラスチックフィルム(20)の蒸着薄膜層面にオーバーコート層(22)を形成させた。   The unwound web is sent to the coating part (13) by a suction roll (12), and a coating solution to be an overcoat layer (22) is continuously applied onto the deposited thin film layer (21) to dry the part. The film was wound around a winding part (16) through (not shown), and an overcoat layer (22) was formed on the vapor-deposited thin film layer surface of the inorganic compound vapor-deposited plastic film (20).

実施例1で使用したグラビア塗工機のサクションロールをニップロールに代えた以外は、実施例1と同じ材料、条件で無機化合物蒸着プラスチックフィルム(20)の蒸着薄膜層面にオーバーコート層(22)を形成させた。   An overcoat layer (22) is formed on the surface of the vapor-deposited thin film layer of the inorganic compound vapor-deposited plastic film (20) under the same materials and conditions as in Example 1 except that the suction roll of the gravure coating machine used in Example 1 is replaced with a nip roll. Formed.

このようにして作製した本発明の実施例である実施例1と本発明の比較例である実施例2の、2例の蒸着薄膜層面にオーバーコート層を形成させた無機化合物蒸着プラスチックフィルムの流れ方向に対してその中央近傍(センター)、左端縁(操作側)近傍、右端縁(マシン側)の3か所について、酸素透過度をMOCON法により測定した(n=5)。その結果を表1に示す。   The flow of the inorganic compound vapor-deposited plastic film in which the overcoat layer was formed on the surface of the two vapor-deposited thin film layers of Example 1 as an example of the present invention and Example 2 as a comparative example of the present invention thus produced. Oxygen permeability was measured by MOCON method at three locations near the center (center), near the left edge (operation side), and right edge (machine side) with respect to the direction (n = 5). The results are shown in Table 1.

Figure 2006341170
表1に示されているように、実施例1では左端縁(操作側)、中央近傍(センター)、右端縁(マシン側)ともに数値にバラツキがなく、ほぼ均一の数値が得られた。このこと
からサクションロールの使用により蒸着薄膜に全くダメージを与えず、バリア性を保持できることが分かる。一方、実施例2では、中央近傍は比較的数値にバラツキはないものの、左端縁(操作側)と右端縁(マシン側)は中央近傍より数値が上がるとともに数値自体にバラツキがでている。このことにより、ニップロールの使用は、蒸着薄膜層にダメージを与えていることが分かる。
Figure 2006341170
As shown in Table 1, in Example 1, the left end edge (operation side), the vicinity of the center (center), and the right end edge (machine side) did not vary in value, and almost uniform values were obtained. From this, it can be seen that the barrier property can be maintained without any damage to the deposited thin film by using the suction roll. On the other hand, in Example 2, although the numerical value in the vicinity of the center has relatively no variation, the numerical value of the left end edge (operation side) and the right end edge (machine side) increases from the vicinity of the center and the numerical value itself varies. This shows that the use of the nip roll is damaging the deposited thin film layer.

本発明の無機化合物蒸着プラスチックフィルムへの塗布液の塗布方法の一実施例を示す、模式説明図である。It is a schematic explanatory drawing which shows one Example of the coating method of the coating liquid to the inorganic compound vapor deposition plastic film of this invention. 本発明の無機化合物蒸着プラスチックフィルムへの塗布液の塗布方法の別の実施例を示す、模式説明図である。It is a schematic explanatory drawing which shows another Example of the coating method of the coating liquid to the inorganic compound vapor deposition plastic film of this invention.

符号の説明Explanation of symbols

11‥‥巻き出し部
12‥‥サクションロール
13‥‥塗工部
14‥‥サクションロール
15‥‥乾燥部
16‥‥巻き取り部
20‥‥無機化合物蒸着プラスチックフィルム
21‥‥蒸着薄膜層
22‥‥塗布液、オーバーコート層
25‥‥基材フィルム
11 ... Unwinding part 12 ... Suction roll 13 ... Coating part 14 ... Suction roll
DESCRIPTION OF SYMBOLS 15 ... Drying part 16 ... Winding part 20 ... Inorganic compound vapor deposition plastic film 21 ... Deposition thin film layer 22 ... Coating liquid, overcoat layer 25 ... Base film

Claims (2)

蒸着薄膜層を有する無機化合物蒸着プラスチックフィルムのウェブを巻き出し部より巻き出し、巻き出されたウェブをサクションロールにより塗工部に送り、蒸着薄膜層面に塗布液を連続して塗布することを特徴とする、無機化合物蒸着プラスチックフィルムへの塗布液の塗布方法。   A web of an inorganic compound vapor-deposited plastic film having a vapor-deposited thin film layer is unwound from the unwinding part, the unwound web is sent to the coating part by a suction roll, and the coating liquid is continuously applied to the vapor-deposited thin film layer surface. The coating method of the coating liquid to an inorganic compound vapor deposition plastic film. 蒸着薄膜層を有する無機化合物蒸着プラスチックフィルムのウェブを巻き出し部より巻き出し、巻き出されたウェブを塗工部に送り、蒸着薄膜層面に塗布液を連続して塗布し、塗布液が塗布されたウェブをサクションロールにより、乾燥部に送ることを特徴とする、無機化合物蒸着プラスチックフィルムへの塗布液の塗布方法。   The web of the inorganic compound vapor-deposited plastic film having the vapor-deposited thin film layer is unwound from the unwinding section, the unwound web is sent to the coating section, and the coating liquid is continuously applied to the surface of the vapor-deposited thin film layer. A method for applying a coating liquid onto an inorganic compound vapor-deposited plastic film, wherein the web is fed to a drying section by a suction roll.
JP2005167935A 2005-06-08 2005-06-08 Application method of coating liquid to inorganic compound vapor-deposited plastic film Expired - Fee Related JP4956920B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021079580A1 (en) * 2019-10-23 2021-04-29 株式会社日本製鋼所 Coating film production method and coating film production device

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JP2001087695A (en) * 1999-09-21 2001-04-03 Toppan Printing Co Ltd Coating apparatus
JP2002160857A (en) * 2000-11-27 2002-06-04 Hirano Tecseed Co Ltd Suction roll
JP2002326049A (en) * 2001-05-07 2002-11-12 Konica Corp Coating and drying method and coating and drying apparatus
JP2003320509A (en) * 2002-04-30 2003-11-11 Toppan Printing Co Ltd Door component

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001087695A (en) * 1999-09-21 2001-04-03 Toppan Printing Co Ltd Coating apparatus
JP2002160857A (en) * 2000-11-27 2002-06-04 Hirano Tecseed Co Ltd Suction roll
JP2002326049A (en) * 2001-05-07 2002-11-12 Konica Corp Coating and drying method and coating and drying apparatus
JP2003320509A (en) * 2002-04-30 2003-11-11 Toppan Printing Co Ltd Door component

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021079580A1 (en) * 2019-10-23 2021-04-29 株式会社日本製鋼所 Coating film production method and coating film production device
JP2021068564A (en) * 2019-10-23 2021-04-30 株式会社日本製鋼所 Method of manufacturing coating film and apparatus for manufacturing coating film
JP7348023B2 (en) 2019-10-23 2023-09-20 株式会社日本製鋼所 Coated film manufacturing method and coated film manufacturing device

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