JPH0688367B2 - Film for packaging - Google Patents
Film for packagingInfo
- Publication number
- JPH0688367B2 JPH0688367B2 JP22558386A JP22558386A JPH0688367B2 JP H0688367 B2 JPH0688367 B2 JP H0688367B2 JP 22558386 A JP22558386 A JP 22558386A JP 22558386 A JP22558386 A JP 22558386A JP H0688367 B2 JPH0688367 B2 JP H0688367B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- layer
- zinc sulfide
- thin film
- thickness
- 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.)
- Expired - Lifetime
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- Laminated Bodies (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は,食品あるいは薬品等の包装用フイルムに関す
るものであり,さらに詳しくは,高度の水蒸気バリヤー
性を有し,かつ透明性にも優れた包装用フイルムに関す
るものである。TECHNICAL FIELD The present invention relates to a film for packaging foods, medicines, etc. More specifically, it has a high degree of water vapor barrier property and excellent transparency. It relates to a packaging film.
(従来の技術) 従来から,食品あるいは薬品等の包装材料として,柔軟
性,透明性,加工性,耐久性に優れ,低コストであるプ
ラスチツクフイルムが広く用いられている。これら食品
包装,薬品包装の分野においては,内容物を腐敗や変質
から守り,長期保存を可能にするために,包装に用いる
材料が優れた水蒸気バリヤー性を持つことが不可欠であ
る。(Prior Art) Conventionally, a plastic film, which is excellent in flexibility, transparency, processability, durability and low in cost, has been widely used as a packaging material for food or medicine. In the fields of food packaging and chemical packaging, it is essential that the materials used for packaging have excellent water vapor barrier properties in order to protect the contents from decay and deterioration and to enable long-term storage.
しかしながら,プラスチツクフイルムの水蒸気バリヤー
性は,上記の目的のためには十分とは言えないのが現状
であり,プラスチツクフイルムに水蒸気バリヤー性を付
与するために様々な方法が行われている。この方法に
は,水蒸気バリヤー性の高い樹脂,たとえばポリ塩化ビ
ニリデン,ポリビニルアルコール等のコーテイング,ア
ルミ箔等の金属のラミネート,あるいはアルミ等の金属
の蒸着などの方法がある。However, the water vapor barrier property of the plastic film is not sufficient for the above purpose at present, and various methods have been used to impart the water vapor barrier property to the plastic film. This method includes a method of coating a resin having a high water vapor barrier property such as polyvinylidene chloride, polyvinyl alcohol, etc., laminating a metal such as aluminum foil, or vapor deposition of a metal such as aluminum.
樹脂のコーテイングは,水蒸気バリヤー性を付与するに
はかなりの厚さが必要であるが,厚さの割には期待する
ほどの水蒸気バリヤー性が得られない。また,アルミ箔
のラミネートや金属の蒸着は,水蒸気バリヤー性には比
較的優れるが,金属層が光線を遮断するために包装内在
物の状態を外側から知ることが出来ないという,包装材
料としては致命的とも思われる欠点がある。The resin coating requires a considerable thickness to provide a water vapor barrier property, but the expected water vapor barrier property cannot be obtained for the thickness. Also, aluminum foil lamination and metal vapor deposition are relatively excellent in water vapor barrier properties, but the state of the contents inside the package cannot be known from the outside because the metal layer blocks light rays, so it is a packaging material. It has the drawback of being considered fatal.
本発明者らは,以前,上記のような問題を解決し,高度
の水蒸気バリヤー性を有し,かつ透明性に優れた包装用
フイルムを得るために,フイルム上に硫化亜鉛薄膜層を
形成した包装用フイルムを提案した(特願昭61−62045
号)。The present inventors have previously formed a zinc sulfide thin film layer on a film in order to solve the above problems and obtain a packaging film having a high degree of water vapor barrier property and excellent transparency. Proposed packaging film (Japanese Patent Application No. 61-62045)
issue).
(発明が解決しようとする問題点) 上記のような本発明者らが以前に提案した方法は,高度
の水蒸気バリヤー性を有し,かつ透明性にも優れたもの
であるが,硫化亜鉛薄膜層が単層膜であるための問題点
があることが判明した。一度成膜中にピンホールが発生
すると,発生したピンホールはそのまま薄膜層の欠陥と
なり,最終的に残るので,高度のバリヤー性を達成出来
ない。また,膜厚を増やしても,達成出来るバリヤー性
には限界があり,むしろクラツクが発生しやすくなる等
の膜厚を増加したことによる弊害の方が大きくなる。ま
た,単層膜を二回以上に分けて成膜する場合も,最初に
形成した膜に存在するピンホールと同じ所に次に形成す
る膜もピンホールが発生し易い。(Problems to be Solved by the Invention) The method previously proposed by the inventors of the present invention as described above has a high degree of water vapor barrier property and is excellent in transparency. It was found that there is a problem because the layer is a single layer film. Once a pinhole is generated during film formation, the generated pinhole directly becomes a defect in the thin film layer and finally remains, so that a high barrier property cannot be achieved. Further, even if the film thickness is increased, there is a limit to the barrier property that can be achieved, and rather, the adverse effects of increasing the film thickness, such as easy occurrence of cracks, become greater. Further, even when the single-layer film is formed twice or more, pinholes are likely to occur in the film formed next at the same place as the pinhole existing in the film formed first.
本発明は,このような従来技術の欠点を解消し,透明で
あり,かつ従来よりさらに高度の水蒸気バリヤー性を有
する包装用フイルムを提供することを目的とするもので
ある。It is an object of the present invention to solve the above-mentioned drawbacks of the prior art and to provide a packaging film which is transparent and has a higher water vapor barrier property than ever before.
(問題点を解決するための手段) 本発明者らは,このような問題点を解決するために鋭意
研究の結果,プラスチツクフイルム上に硫化亜鉛薄膜層
を形成したあと,さらに透明樹脂層を形成し,その上に
もう一度硫化亜鉛薄膜層を形成することにより,透明性
を損なうことなく,従来以上の優れた水蒸気バリヤー性
を得ることが出来ることを見出し,本発明に到達した。(Means for Solving Problems) As a result of earnest research to solve such problems, the present inventors formed a zinc sulfide thin film layer on a plastic film and then formed a transparent resin layer. Then, the inventors have found that by forming a zinc sulfide thin film layer on it again, it is possible to obtain a more excellent water vapor barrier property than before without impairing transparency, and arrived at the present invention.
すなわち,本発明は,透明なプラスチツクフイルムの少
なくとも片面に,硫化亜鉛薄膜層,透明樹脂層,硫化亜
鉛薄膜層を順次積層したバリヤー層を設け,このバリヤ
ー層の硫化亜鉛薄膜層の一層の膜厚が0.02〜1.0μmで
あり,透明樹脂層の膜厚が0.5μm以上であることを特
徴とする包装用フイルムを提供するものである。That is, the present invention provides a barrier layer in which a zinc sulfide thin film layer, a transparent resin layer, and a zinc sulfide thin film layer are sequentially laminated on at least one surface of a transparent plastic film, and the film thickness of one layer of the zinc sulfide thin film layer of this barrier layer is provided. Is 0.02 to 1.0 μm, and the film thickness of the transparent resin layer is 0.5 μm or more, and a packaging film is provided.
本発明に用いるプラスチツクフイルムは,透明であり,
通常包装用として用いられるものであれば良い。例とし
ては,ナイロン,ポリエステル,ポリプロピレン,ポリ
ビニルアルコール,ポリ塩化ビニル,ポリエチレン,ポ
リスチレン,ポリイミド,ポリカーボネート,ポリアリ
レート,ポリエチンレンビニルアルコール共重合体等の
フイルムがあるが,これらに限定されるものではない。
これらのフイルムは,単体でも良いし、ラミネートした
ものでも良い。また,これらのフイルムは,必要ならば
コロナ放電処理,プラズマ処理などの表面処理を行った
ものでも良いし,フイルム上にアルキルチタネート,ポ
リエチレンイミン,イソシアネート等のアンカー処理剤
をコートしたもの,ポリ塩化ビニリデン等のバリヤー性
の樹脂をコートしたものでも良い。しかし,余りにも表
面粗さが大きいもの,皺のあるものは,フイルム上に均
一連続した硫化亜鉛薄膜層を形成することが難しいので
好ましくない。The plastic film used in the present invention is transparent,
What is normally used for packaging may be used. Examples include, but are not limited to, films of nylon, polyester, polypropylene, polyvinyl alcohol, polyvinyl chloride, polyethylene, polystyrene, polyimide, polycarbonate, polyarylate, polyethylene vinyl alcohol copolymer, and the like. Absent.
These films may be used alone or laminated. If necessary, these films may be subjected to surface treatment such as corona discharge treatment or plasma treatment, or may be coated with an anchoring agent such as alkyl titanate, polyethyleneimine or isocyanate on the film, or polychlorinated. It may be coated with a resin having a barrier property such as vinylidene. However, if the surface roughness is too large or if wrinkles are present, it is difficult to form a uniform and continuous zinc sulfide thin film layer on the film, which is not preferable.
硫化亜鉛薄膜層は,通常,物理的気相成長法と呼ばれる
真空薄膜形成法,すなわち,真空蒸着法,イオンプレー
テイング法,スパツタリング法等により形成することが
出来る。薄膜の付着強度,成膜速度の点からイオンプレ
ーテイング法が好ましいが,特に限定されるものではな
い。The zinc sulfide thin film layer can be formed by a vacuum thin film forming method generally called physical vapor deposition method, that is, a vacuum vapor deposition method, an ion plating method, a sputtering method or the like. The ion plating method is preferable in terms of the adhesion strength of the thin film and the film formation rate, but is not particularly limited.
硫化亜鉛薄膜層の膜厚は,単一層が0.02〜1.0μmであ
る。膜厚が0.02μm以下の場合には,薄膜が均一な連続
膜とはならず,本発明で期待する効果が得られない。膜
厚が0.02μm以上あれば,本発明の効果が現れるが,さ
らに好ましくは,0.04μm以上の膜厚が良い。また,膜
厚が1.0μmを越えると,膜厚の増加の割にはバリヤー
性が向上せず,場合によってはクラツクが生じやすくな
るなどの弊害が生ずる。The thickness of the zinc sulfide thin film layer is 0.02 to 1.0 μm for the single layer. When the film thickness is 0.02 μm or less, the thin film does not become a uniform continuous film, and the effect expected by the present invention cannot be obtained. If the film thickness is 0.02 μm or more, the effect of the present invention appears, but more preferably, the film thickness is 0.04 μm or more. On the other hand, if the film thickness exceeds 1.0 μm, the barrier property is not improved in spite of the increase in the film thickness, and in some cases, cracking is likely to occur.
透明樹脂層に用いられる樹脂としては,ポリエステル,
ポリカーボネート,ポリメチルメタクリレート,ポリウ
レタン,ポリ塩化ビニリデン,ポリビニルアルコール,
ポリアミド,ポリイミド,エポキシ樹脂等が挙げられる
が,透明なものであればこの例に限定されない。透明樹
脂層の形成法としては,グラビアロールコーター,ドク
ターナイフ,バーコーター,カーテンコーター,ナイフ
コーター等の公知の塗工機を用いる塗工法,スプレー
法,浸漬法等が用いられる。As the resin used for the transparent resin layer, polyester,
Polycarbonate, polymethylmethacrylate, polyurethane, polyvinylidene chloride, polyvinyl alcohol,
Examples thereof include polyamide, polyimide, and epoxy resin, but the transparent material is not limited to this example. As a method for forming the transparent resin layer, a coating method using a known coating machine such as a gravure roll coater, a doctor knife, a bar coater, a curtain coater, a knife coater, a spray method, and a dipping method are used.
透明樹脂層の膜厚は,0.5μm以上が好ましい。0.5μm
以下の場合には,均一で連続した膜をつくりにくく,樹
脂層を設ける効果が十分に発揮されない。通常の包装用
フイルムは12μm,25μm厚であるので,この基体フイル
ムの厚さとバランスのとれた実用的な透明樹脂層の膜厚
は5μm以下が好ましい。The thickness of the transparent resin layer is preferably 0.5 μm or more. 0.5 μm
In the following cases, it is difficult to form a uniform and continuous film, and the effect of providing the resin layer is not sufficiently exerted. Since the usual packaging film has a thickness of 12 μm and 25 μm, the thickness of the practical transparent resin layer, which is well balanced with the thickness of the base film, is preferably 5 μm or less.
透明樹脂層を挟んで硫化亜鉛薄膜層を設けることにより
高度の水蒸気バリヤー性が得られる理由は明らかではな
いが,第1層目の硫化亜鉛薄膜にピンホール等の欠陥が
生じたとしても,透明樹脂層がその欠陥をかくし,第2
層目の硫化亜鉛薄膜層が成長する時に同じ所で欠陥が生
ずるのを防ぐためと考えられる。したがって,透明樹脂
層を形成することにより,二つの硫化亜鉛薄膜層のピン
ホールが直接重なるのを防ぐことが出来,結果として高
度の水蒸気バリヤー性を達成出来る。It is not clear why a high degree of water vapor barrier property can be obtained by providing a zinc sulfide thin film layer with a transparent resin layer sandwiched between them, but even if defects such as pinholes occur in the first layer of zinc sulfide thin film, it is transparent. The resin layer hides the defect,
This is considered to prevent defects from occurring at the same place when the zinc sulfide thin film layer of the layer grows. Therefore, by forming the transparent resin layer, it is possible to prevent the pinholes of the two zinc sulfide thin film layers from directly overlapping, and as a result, a high degree of water vapor barrier property can be achieved.
透明樹脂層を挟んで硫化亜鉛薄膜層を形成した場合,そ
の硫化亜鉛薄膜層の合計の膜厚と同じ膜厚の硫化亜鉛薄
膜の単層膜よりも優れた効果が得られる。When a zinc sulfide thin film layer is formed with a transparent resin layer sandwiched between the transparent resin layer and the zinc sulfide thin film layer, the effect is superior to that of a single layer of zinc sulfide thin film having the same thickness as the total thickness of the zinc sulfide thin film layers.
通常は,外側の硫化亜鉛薄膜層上に,薄膜層を保護する
ため,透明樹脂の保護コーテイングを施すのが望まし
い。透明樹脂には,ポリメチルメタクリレート等のアク
リル酸エステル系樹脂,ポリアクリルニトリルあるいは
ポリメタアクリルニトリル等のアクリル系樹脂,ポリエ
チレンあるいはポリプロピレン等のポリオレフイン系樹
脂,エチルシリケートより得られる重合体等の珪素樹
脂,ポリエステル系樹脂,メラミン樹脂,フツ素系樹脂
等を用い,従来公知の方法でコーテイングすれば良い。Normally, it is desirable to apply a transparent resin protective coating on the outer zinc sulfide thin film layer in order to protect the thin film layer. Examples of the transparent resin include acrylic ester resins such as polymethylmethacrylate, acrylic resins such as polyacrylonitrile and polymethacrylonitrile, polyolefin resins such as polyethylene and polypropylene, and silicon resins such as polymers obtained from ethyl silicate. A polyester resin, a melamine resin, a fluorine resin, or the like may be used for coating by a conventionally known method.
必要な場合は,硫化亜鉛と透明樹脂との積層をさらに繰
り返しても良い。If necessary, lamination of zinc sulfide and transparent resin may be repeated.
(実施例) 以下,本発明を実施例により具体的に説明する。(Examples) Hereinafter, the present invention will be specifically described with reference to Examples.
以下の実施例において,各測定は次の測定法により行っ
た。In the following examples, each measurement was performed by the following measuring method.
透湿度測定は,JIS Z 0208により,40℃,90%RHの条件
で行った。The moisture permeability was measured according to JIS Z 0208 under the conditions of 40 ° C and 90% RH.
光線透過率は,分光光度計U−3400(日立製作所製)を
用い,550nmの波長における基体を含めたい光線透過率
を,空気をレフアレンスとして測定した。The light transmittance was measured by using a spectrophotometer U-3400 (manufactured by Hitachi, Ltd.), and the light transmittance desired to include the substrate at a wavelength of 550 nm was measured using air as a reference.
硫化亜鉛薄膜層の膜厚は,水晶振動子式膜厚計CRM−1D
(日本真空製)を用いて測定した。ただし,水晶振動子
膜厚計は,あらかじめ多重反射干渉法による膜厚計911
−9150ナノスコープ(日電アネルバ製)を用いて校正し
た。The film thickness of the zinc sulfide thin film layer is CRM-1D
(Manufactured by Nippon Vacuum Co., Ltd.). However, the crystal oscillator film thickness meter is based on the multiple reflection interferometry method in advance.
It was calibrated using a -9150 Nanoscope (Nichiden Anelva).
実施例1 厚さ12μmのポリエチレンテレフタレート(PET)フイ
ルムを基体として厚さ0.06μmの硫化亜鉛薄膜を形成
し,次に,厚さ2μmのポリエステル樹脂(UE−3050,
ユニチカ)層をバーコード法により形成した。さらに,
樹脂層の上に種々の膜厚の硫化亜鉛薄膜層を形成した。
硫化亜鉛薄膜は,RFイオンプレーテイング法により形成
した。真空装置内を1×10-5Torrまで排気したのち,ア
ルゴンガスを2×10-4Torr導入し,電圧2kV,周波数13.5
6MHzの高周波電界を50W印加し,プラズマを発生させな
がら,電子銃により硫化亜鉛焼結体を加熱蒸発させ,10
Å/sの成膜速度で形成した。Example 1 A 0.06 μm thick zinc sulfide thin film was formed on a 12 μm thick polyethylene terephthalate (PET) film as a substrate, and then a 2 μm thick polyester resin (UE-3050,
The unitika) layer was formed by the barcode method. further,
Zinc sulfide thin film layers having various thicknesses were formed on the resin layer.
Zinc sulfide thin films were formed by RF ion plating method. After evacuating the vacuum system to 1 × 10 -5 Torr, introducing argon gas at 2 × 10 -4 Torr, voltage 2 kV, frequency 13.5.
Applying a high frequency electric field of 6 MHz at 50 W, the zinc sulfide sinter was heated and evaporated by an electron gun while generating plasma.
It was formed at a deposition rate of Å / s.
これらの試料について,透湿度,光線透過率を測定し
た。結果は第1表に示す。硫化亜鉛合計膜厚は,第1層
目の硫化亜鉛薄膜層の膜厚0.06μmと,樹脂層上に形成
した硫化亜鉛薄膜層の膜厚を合計したものである。The water vapor transmission rate and light transmittance of these samples were measured. The results are shown in Table 1. The total zinc sulfide film thickness is the sum of the film thickness of the first zinc sulfide thin film layer of 0.06 μm and the film thickness of the zinc sulfide thin film layer formed on the resin layer.
これより,硫化亜鉛薄膜層の膜厚が0.02μm以上で透湿
度が小さくなることが分かる。また,硫化亜鉛薄膜層の
膜厚が1.0μmを越すと,膜厚増加の割には透湿度は小
さくならないので,膜厚は1.0μm以下が好ましい。From this, it is understood that the water vapor transmission rate becomes small when the film thickness of the zinc sulfide thin film layer is 0.02 μm or more. Further, when the film thickness of the zinc sulfide thin film layer exceeds 1.0 μm, the water vapor transmission rate does not decrease in spite of the increase in film thickness, so the film thickness is preferably 1.0 μm or less.
また,PETフイルム上に種々の膜厚の硫化亜鉛薄膜を形成
し,次に,厚さ2μmのポリエステル樹脂(UE−3050,
ユニチカ)層を形成し,最後に,厚さ0.06μmの硫化亜
鉛薄膜層を形成した場合も同様の結果であった。また,
硫化亜鉛薄膜層をどちらも0.02μm形成した場合も良好
な結果が得られたが,どちらか一方の膜の厚さが0.02μ
m以下になると,透湿度は1g/m2・24h以上となり,本発
明の目的とする高度の水蒸気バリヤー性を達成出来な
い。これらのことから,硫化亜鉛薄膜層は単一層が0.02
μm以上である必要がある。In addition, zinc sulfide thin films of various thicknesses were formed on PET film, and then 2 μm thick polyester resin (UE-3050,
The same result was obtained when the unitika) layer was formed and finally a 0.06 μm thick zinc sulfide thin film layer was formed. Also,
Good results were obtained when both zinc sulfide thin film layers were formed to 0.02 μm, but the thickness of one of them was 0.02 μm.
When it is less than m, the water vapor transmission rate becomes 1 g / m 2 · 24 h or more, and the high-level water vapor barrier property aimed at by the present invention cannot be achieved. From these results, a single layer of zinc sulfide thin film is 0.02
It must be at least μm.
比較例 厚さ12μmのPETフイルムの片面に,厚さ0.12μmの硫
化亜鉛の単層膜を形成し,次に,ポリエステル樹脂(UE
−3050,ユニチカ)を厚さ2μmに塗布した(比較例
1)。 Comparative Example A 0.12 μm-thick zinc sulfide single-layer film was formed on one side of a 12 μm-thick PET film, and then a polyester resin (UE
-3050, Unitika) was applied to a thickness of 2 μm (Comparative Example 1).
また,厚さ12μmのPETフイルムの片面に,厚さ0.06μ
mの硫化亜鉛薄膜を,樹脂層を形成せずに2回に分けて
形成し,厚さ0.12μmの硫化亜鉛薄膜層を得た。この上
に,ポリエステル樹脂(UE−3050,ユニチカ)を厚さ2
μmに塗布した(比較例2)。In addition, the thickness of 0.06μ on one side of the PET film of thickness 12μm
A zinc sulfide thin film having a thickness of 0.12 μm was obtained by forming a zinc sulfide thin film having a thickness of 0.12 μm without forming a resin layer. Polyester resin (UE-3050, Unitika) with a thickness of 2
It was applied to a thickness of μm (Comparative Example 2).
また,厚さ12μmのPETフイルムの両面に,厚さ0.06μ
mの硫化亜鉛の単層膜を形成し,片方の硫化亜鉛薄膜上
に,ポリエステル樹脂(UE−3050,ユニチカ)を厚さ2
μmに塗布した(比較例3)。In addition, 0.06μ thick on both sides of 12μm thick PET film
m zinc sulfide single layer film is formed, and polyester resin (UE-3050, Unitika) is formed on one zinc sulfide thin film to a thickness of 2
It was applied to a thickness of μm (Comparative Example 3).
硫化亜鉛薄膜層の形成は,実施例1と同様のRFイオンプ
レーテイング法で行い,樹脂の塗布はバーコート法で行
った。これらの比較例はすべて,硫化亜鉛薄膜の合計膜
厚が0.12μmである。The zinc sulfide thin film layer was formed by the same RF ion plating method as in Example 1, and the resin was applied by the bar coat method. In all of these comparative examples, the total thickness of the zinc sulfide thin film is 0.12 μm.
これらの試料について透湿度,光線透過率を測定した。
結果は第2表に示す。この結果と実施例1の合計の硫化
亜鉛薄膜合計膜厚が0.12μmの場合と比較してみると,
硫化亜鉛薄膜層の膜厚は同じでも,比較例の方は透湿度
が大きく,水蒸気バリヤー性に劣ることがわかる。The water vapor transmission rate and light transmittance of these samples were measured.
The results are shown in Table 2. Comparing this result with the case where the total zinc sulfide thin film total film thickness of Example 1 is 0.12 μm,
It can be seen that although the zinc sulfide thin film layer has the same film thickness, the comparative example has a higher water vapor transmission rate and a poorer water vapor barrier property.
実施例2 厚さ12μmのPETフイルム上に厚さ0.06μmの硫化亜鉛
薄膜を形成し,ポリエステル樹脂(UE−3050,ユニチ
カ)を種々の膜厚にコーテイングし,さらに,樹脂の上
に厚さ0.06μmの硫化亜鉛薄膜層を形成した。それぞれ
の膜の成膜方法は実施例1と同様である。 Example 2 A 0.06 μm-thick zinc sulfide thin film was formed on a 12 μm-thick PET film, a polyester resin (UE-3050, Unitika) was coated to various film thicknesses, and further a 0.06 μm-thickness was applied onto the resin. A zinc sulfide thin film layer of μm was formed. The method of forming each film is the same as that in the first embodiment.
これらの試料について透湿度,光線透過率を測定した。
結果は第3表に示す。この結果より,樹脂層の厚さが0.
5μm以上の時に透湿度が特に小さいことが分かる。The water vapor transmission rate and light transmittance of these samples were measured.
The results are shown in Table 3. From this result, the thickness of the resin layer is 0.
It can be seen that the water vapor permeability is particularly small when the thickness is 5 μm or more.
実施例3 厚さ12μmのPETフイルム上に厚さ0.06μmの硫化亜鉛
薄膜層を形成し,次に,厚さ2μm透明樹脂層を形成し
た。樹脂としては,ポリメチルメタクリレート(P 13
30,大日本インキ),ポリカーボネート(S 200F,三菱
瓦斯化学),ポリウレタン(クリスボン NT−150,大日
本インキ),ポリアリレート(Uポリマー,ユニチカ)
を用いた。さらに,樹脂層の上に厚さ0.06μmの硫化亜
鉛薄膜層を形成した。これらの試料について透湿度,光
線透過率を測定した。結果は第4表に示す。 Example 3 A 0.06 μm thick zinc sulfide thin film layer was formed on a 12 μm thick PET film, and then a 2 μm thick transparent resin layer was formed. As the resin, polymethylmethacrylate (P 13
30, Dainippon Ink), Polycarbonate (S 200F, Mitsubishi Gas Chemical), Polyurethane (Crisbon NT-150, Dainippon Ink), Polyarylate (U Polymer, Unitika)
Was used. Furthermore, a 0.06 μm thick zinc sulfide thin film layer was formed on the resin layer. The water vapor transmission rate and light transmittance of these samples were measured. The results are shown in Table 4.
(発明の効果) 本発明によれば,硫化亜鉛薄膜層,透明樹脂層,硫化亜
鉛薄膜層を順次積層したバリヤー層を設けることによ
り,透明性を損なわずに,硫化亜鉛薄膜の単層膜では達
成出来ない高度の水蒸気バリヤー性を達成することが出
来る。したがって,本発明の包装用フイルムは,透明性
と水蒸気バリヤー性が要求される食品,薬品,工業製品
の包装分野に広く用いることが出来る。 (Effect of the Invention) According to the present invention, by providing a barrier layer in which a zinc sulfide thin film layer, a transparent resin layer, and a zinc sulfide thin film layer are sequentially laminated, a single layer film of a zinc sulfide thin film can be obtained without impairing transparency. A high degree of water vapor barrier property that cannot be achieved can be achieved. Therefore, the packaging film of the present invention can be widely used in the packaging fields of foods, chemicals, and industrial products that require transparency and water vapor barrier properties.
第1図は,本発明の包装用フイルムの断面図である。第
2図は,従来の包装用フイルムの断面図である。 1……基体フイルム 2,4……硫化亜鉛薄膜層 3……透明樹脂層FIG. 1 is a cross-sectional view of the packaging film of the present invention. FIG. 2 is a sectional view of a conventional packaging film. 1 ... Substrate film 2,4 ... Zinc sulfide thin film layer 3 ... Transparent resin layer
Claims (1)
片面に,硫化亜鉛薄膜層,透明樹脂層,硫化亜鉛薄膜層
を順次積層したバリヤー層を設け,このバリヤー層の硫
化亜鉛薄膜層の単一層の膜厚が0.02〜1.0μmであり,
透明樹脂層の膜厚が0.5μm以上であることを特徴とす
る包装用フイルム。1. A transparent plastic film is provided with a barrier layer in which a zinc sulfide thin film layer, a transparent resin layer, and a zinc sulfide thin film layer are sequentially laminated on at least one surface, and the thickness of a single layer of the zinc sulfide thin film layer of the barrier layer. Is 0.02 to 1.0 μm,
A film for packaging, wherein the film thickness of the transparent resin layer is 0.5 μm or more.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22558386A JPH0688367B2 (en) | 1986-09-24 | 1986-09-24 | Film for packaging |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22558386A JPH0688367B2 (en) | 1986-09-24 | 1986-09-24 | Film for packaging |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6381039A JPS6381039A (en) | 1988-04-11 |
JPH0688367B2 true JPH0688367B2 (en) | 1994-11-09 |
Family
ID=16831584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22558386A Expired - Lifetime JPH0688367B2 (en) | 1986-09-24 | 1986-09-24 | Film for packaging |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0688367B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5412888B2 (en) * | 2009-03-09 | 2014-02-12 | 東レ株式会社 | Gas barrier film |
-
1986
- 1986-09-24 JP JP22558386A patent/JPH0688367B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS6381039A (en) | 1988-04-11 |
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