JPH02122925A - Transparent moisture-proof package material - Google Patents

Transparent moisture-proof package material

Info

Publication number
JPH02122925A
JPH02122925A JP27835988A JP27835988A JPH02122925A JP H02122925 A JPH02122925 A JP H02122925A JP 27835988 A JP27835988 A JP 27835988A JP 27835988 A JP27835988 A JP 27835988A JP H02122925 A JPH02122925 A JP H02122925A
Authority
JP
Japan
Prior art keywords
layer
oxide
ultraviolet
moisture
transparent
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.)
Granted
Application number
JP27835988A
Other languages
Japanese (ja)
Other versions
JP2692187B2 (en
Inventor
Mamoru Sekiguchi
守 関口
Fumio Orimoto
織本 文雄
Nobuhiko Imai
伸彦 今井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Printing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP63278359A priority Critical patent/JP2692187B2/en
Publication of JPH02122925A publication Critical patent/JPH02122925A/en
Application granted granted Critical
Publication of JP2692187B2 publication Critical patent/JP2692187B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To impart a ultraviolet ray insulation effect while keeping transparency in a visible area, and improve damping property by forming a damping layer consisting of magnesium oxide and a ultraviolet ray insulation layer consisting of metal, or metallic compound on a polymeric film having transparency in turn or in the form of mixed condition. CONSTITUTION:At least one surface of polyester, biaxial orientated polypropylene, biaxially oriented nylon or the like to be the base material of a transparent package material, a magnesium oxide layer is formed as a transparent moisture-proof layer, and a metal and metallic compound layer is formed as a ultraviolet insulation layer subsequently, furthermore, transparent resin having heat sealing property is laminated thereon. The moisture-proof layer and ultraviolet insulation layer are formed by a PVD method such as ordinary evaporation, sputtering, ion-plating or the like. Zinc oxide, tin oxide, titanium oxide, and iron oxide are suitable for the ultraviolet insulation layer.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、食品、医薬品分野等に用いられる透明防湿包
装体に関し、特に可視波長領域において高透明、かつ4
00n−波長以下の紫外領域の波長をカットし、さらに
、極めて高い防湿性を有した透明防湿包装体に関する。
Detailed Description of the Invention <Industrial Application Field> The present invention relates to a transparent moisture-proof packaging used in the food, pharmaceutical, etc.
The present invention relates to a transparent moisture-proof package that cuts wavelengths in the ultraviolet region below 00n-wavelength and has extremely high moisture-proof properties.

〈従来技術及びその問題点〉 従来から食品、医薬品の包装分野において、包装体に要
求される機能として、その内容物酸化、変質、劣化、抑
制の点から防湿性は、必須機能である。
<Prior art and its problems> Moisture-proofing has traditionally been an essential function of packaging bodies in the field of food and pharmaceutical packaging, from the standpoint of preventing oxidation, alteration, deterioration, and suppression of the contents.

そのために、従来より、防湿性のより、二重延伸ポリプ
ロピレン以下(OPP)、そのにコートポリプロピレン
(KOP)、Kコートポリエチレンテレフタート(KP
ET)等とヒートシール性を有するポリエチレン(PE
)、ポリプロピレン(CPP)などと積層し、包装材を
得ていた。
To this end, we have traditionally used double-oriented polypropylene (OPP), coated polypropylene (KOP), and K-coated polyethylene tereftate (KP) to improve moisture resistance.
Polyethylene (PE) with heat-sealing properties such as
), polypropylene (CPP), etc. to obtain packaging materials.

更に、高ガスバリアー性を得るためには、エチレンビニ
ルアルコール共重合体1を下E v OH)、AIFl
!i、An!蒸着等を用い、積層することで優れたガス
バリアー機能性を備えた包装材が得られていた。
Furthermore, in order to obtain high gas barrier properties, ethylene vinyl alcohol copolymer 1 must be mixed with EvOH), AIFl
! i, An! Packaging materials with excellent gas barrier functionality have been obtained by laminating them using vapor deposition or the like.

一方、食品等の内容物(特に油脂類)の酸化を促進する
要因に酸素の他に300〜400nmの紫外線が挙げら
れる。
On the other hand, in addition to oxygen, ultraviolet rays of 300 to 400 nm are factors that promote the oxidation of the contents of foods and the like (particularly oils and fats).

この紫外線により、内容物が活性ラジカルにより、酸化
、重合、過酸化物化することで、酸化、変質が起こり、
内容物の安定保護をするために、包装材に紫外線吸収機
能を付与することが必要になって(る。
Due to this ultraviolet rays, the contents are oxidized, polymerized, and peroxided by active radicals, causing oxidation and deterioration.
In order to stably protect the contents, it has become necessary to provide packaging materials with an ultraviolet absorption function.

このために、現在では、ベンゾフェノン系他いろいろな
タイプの紫外線吸収剤等を包装材を構成する樹脂に練込
んだり、コーティング、更には、接着剤に添加して用い
て積層した包装材としているのが現状である。
To this end, various types of ultraviolet absorbers, including benzophenone, are now kneaded into the resins that make up packaging materials, coated with them, and even added to adhesives to create laminated packaging materials. is the current situation.

しかしながら、それらの紫外線遮断効果はAN箔やA!
蒸着フィルムを用いた包装材以外十分でなく、また、そ
れが内容物に移行したり、包材表面に浮き出ることは、
食品衛生上好ましくない。
However, their UV blocking effect is lower than that of AN foil and A!
Packaging materials using vapor-deposited films are not sufficient, and they do not transfer to the contents or stand out on the surface of the packaging material.
Unfavorable from a food hygiene perspective.

一方、紫外線遮断効果のある材料として、紙があるが、
当然の如く、この祇自身は可視領域においても光線遮断
効果があり、この材料も用いて包装材を得た場合には、
第一に内容物の確認ができないという問題点があった。
On the other hand, paper is a material that has an ultraviolet blocking effect.
Naturally, this material itself has a light blocking effect even in the visible region, and if this material is also used to obtain a packaging material,
First, there was the problem that the contents could not be confirmed.

以上のように、ガスバリヤ−性、防湿性、紫外線遮断性
の三つの機能を持つ包装材を得るには、防湿性のよいO
PP、KOP、KPET等と、EVOH,更にはA2蒸
着フィルム、紙等を積層し、これにオレフィン等のヒー
トシール性樹脂を設けることで、目的の包装材が得られ
た。
As described above, in order to obtain packaging materials with the three functions of gas barrier properties, moisture proof properties, and UV blocking properties, it is necessary to
The desired packaging material was obtained by laminating PP, KOP, KPET, etc., EVOH, A2 vapor-deposited film, paper, etc., and providing a heat-sealing resin such as olefin thereon.

しかし、上記のように紙、A2蒸着フィルムを包装体の
構成材料に使用すると、包装体として使用した時の内容
物の61!認ができないという透明性の点で問題があっ
た。
However, when paper and A2 vapor-deposited film are used as the constituent materials of the package as described above, the contents when used as a package are 61%! There was a problem in terms of transparency as it was impossible to confirm the details.

〈発明が解決しようとする課題〉 本発明は、上記従来の欠点を解決するものであり、その
目的とすることは、透明高分子フィルム上に酸化マグネ
シウムの透明防湿層と、紫外線遮断層を設け、更にヒー
トシール性を存するオレフィン樹脂を積層することで、
従来にない、紫外線を遮断し、かつ、高防湿性を有した
透明防湿包装材を提供するものである。
<Problems to be Solved by the Invention> The present invention solves the above-mentioned conventional drawbacks, and its purpose is to provide a transparent moisture-proof layer of magnesium oxide and an ultraviolet blocking layer on a transparent polymer film. , by further laminating olefin resin with heat-sealing properties,
The present invention provides an unprecedented transparent moisture-proof packaging material that blocks ultraviolet rays and has high moisture-proof properties.

く課題を解決するための手段〉 本発明は、透明な包装材料の基材となるポリエステル(
PET)、二軸延伸ポリプロピレン(OPP)、二軸延
伸ナイロン(ONy)等の少なくとも片面に透明防湿層
として酸化マグネシウムを、紫外線遮断層として、金属
、金属化合物層を順次、形成し必要に応じて保管層とし
て透明樹脂層を設け、更にヒートシール性を有する透明
樹脂を積層した透明防湿包装材である。
Means for Solving the Problems> The present invention provides polyester (
PET), biaxially oriented polypropylene (OPP), biaxially oriented nylon (ONy), etc., are sequentially formed with magnesium oxide as a transparent moisture-proof layer and a metal or metal compound layer as an ultraviolet blocking layer on at least one side of the material. This is a transparent moisture-proof packaging material in which a transparent resin layer is provided as a storage layer, and a transparent resin with heat-sealability is further laminated.

詳細に説明すると、本発明でいう透明性を有する高分子
フィルムとは通常の包装材料に用いられている。ポリエ
ステル(PET)、二軸延伸ナイロン(ONy)、二輪
延伸ポリプロピレン(OPP)等の機械的強度、寸法安
定伊勢のあるフィルムであって、平滑性の優れ、かつ、
添加剤の少ない蒸着フィルム用が好ましい、厚さは6μ
〜300μ程度で、包材としては12〜25μが好まし
い、必要に応じて、コロナ処理、低温プラズマ処理、イ
オンボンバード処理等の物理処理、更には薬品、溶剤処
理などの化学処理を行ったものでもかまわない。
To explain in detail, the transparent polymer film referred to in the present invention is used in ordinary packaging materials. Films with mechanical strength and dimensional stability such as polyester (PET), biaxially oriented nylon (ONy), and biaxially oriented polypropylene (OPP), with excellent smoothness and
Preferably for vapor deposited films with few additives, thickness is 6μ
~300μ, preferably 12~25μ as a packaging material.If necessary, physical treatment such as corona treatment, low-temperature plasma treatment, ion bombardment treatment, or chemical treatment such as chemical or solvent treatment may be applied. I don't mind.

また、防湿層、紫外線遮断層を設ける手段は、通常の蒸
着、スパッタリング、イオンブレーティング等のPVD
法で形成し、特に蒸着が生産性、ハンドリング性に優れ
ているので、この方法が効果的である。更に、防湿層は
、酸化マグネシウム薄膜からなり、その膜厚としては、
1000Å以上3000人であって1000Å以下であ
ると、その防湿性が不十分であり、3000Å以上にな
ると薄膜がフレキシビリティ−を損ない、膜にクランク
が生じ、防湿性か逆に低下してしまう。このようなこと
から酸化マグネシウム薄膜厚は1500人〜?000人
の範囲が最も好ましい。
In addition, the means for providing the moisture-proof layer and the ultraviolet blocking layer are PVD such as ordinary vapor deposition, sputtering, and ion blasting.
This method is effective because vapor deposition has excellent productivity and handling properties. Furthermore, the moisture barrier layer is made of a thin magnesium oxide film, and its thickness is as follows:
If it is between 1000 Å and 3000 Å but not more than 1000 Å, the moisture-proofing property will be insufficient, and if it is more than 3000 Å, the thin film will lose its flexibility and the film will become cranked, resulting in a decrease in its moisture-proofing property. Based on this, the thickness of the magnesium oxide thin film is 1500~? A range of 000 people is most preferred.

また、紫外線遮断層としては金属化合物、特にその酸化
物薄膜からなり、特に酸化亜鉛、酸化スズ、酸化チタン
、酸化鉄が好適である。
Further, the ultraviolet blocking layer is made of a thin film of a metal compound, especially its oxide, and zinc oxide, tin oxide, titanium oxide, and iron oxide are particularly suitable.

この金属酸化物薄膜からなる紫外線遮断層を形成するに
は、通常の渾着法であると膜組成に年金−性が生じるた
め、酸素ガスを一定量流しながら蒸着させる、いわゆる
反応性蒸着が好ましく、更にはスパッタリング、イオン
ブレーティングの方が適している。
In order to form this ultraviolet blocking layer made of a metal oxide thin film, it is preferable to use so-called reactive vapor deposition, in which vapor deposition is performed while flowing a constant amount of oxygen gas, since the normal deposition method produces a silvery-smelling effect on the film composition. Furthermore, sputtering and ion blating are more suitable.

この紫外線遮断層を形成する前、特に酸化亜鉛を蒸着す
る前には銅を50Å以下の極めて薄く目視では何の変化
もないぐらいの厚さに前処理した後、該当物質を蒸着す
るような、いわゆる蒸着成膜の容易でないものについて
は、銅などのような金属を核付けとして施してもよい。
Before forming this ultraviolet blocking layer, especially before depositing zinc oxide, the copper is pretreated to an extremely thin thickness of 50 Å or less, so that there is no visible change, and then the corresponding material is deposited. For films that are difficult to form by vapor deposition, a metal such as copper may be applied as a core.

これら紫外線遮断層としての金属酸化物等の有効薄膜厚
価々の材料により依存するが、−C的に1000〜50
00人程度が必要であり、1000Å以下であるとその
遮断効果が不十分であり、かつ、5000Å以上になる
と可視領域に該金属酸化物薄膜の反射光の補色、吸収が
表れ、なんらかの着色現象が起こってくるので好ましく
ない。
The effective thin film thickness of metal oxides, etc. as these ultraviolet blocking layers depends on the material, but in terms of -C, it is 1000 to 50.
If it is less than 1000 Å, the blocking effect will be insufficient, and if it is more than 5000 Å, complementary colors and absorption of the light reflected by the metal oxide thin film will appear in the visible region, and some coloring phenomenon will occur. I don't like it because it happens.

このように、透明な高分子フィルム上にPVD法により
防湿層と紫外線吸収層を形成したものは必要に応じて保
護層としてウレタン、塩ビ、塩酢ビ、ポリエステル系等
の透明レジューサ−から成る透明樹脂層を1〜2μ設け
てもかまわない。
In this way, a moisture-proof layer and an ultraviolet absorbing layer are formed on a transparent polymer film by the PVD method. The resin layer may have a thickness of 1 to 2 μm.

そして、上記フィルムとヒートシール性樹脂を積層する
ことにより目的の包装材が得られる。積層方法としては
、−a的なポリウレタン系等の二液硬化型、−i硬化型
の接着剤を用いたドライラミネート法、フィルム上にオ
レフィン樹脂、アイオノマー樹脂を押出し、ラミネート
するいわゆるエクストルージョンラミネート法のいずれ
であってもかまわない。
Then, the desired packaging material is obtained by laminating the film and the heat-sealable resin. Lamination methods include dry lamination using a two-component curing type adhesive such as -a polyurethane type, -i curing type adhesive, and the so-called extrusion lamination method in which olefin resin or ionomer resin is extruded onto a film and laminated. It doesn't matter if it's either.

このヒートシール性樹脂の厚さとしては、20μ〜10
0μ程度であれば十分である。
The thickness of this heat-sealable resin is 20μ to 10μ.
A value of about 0μ is sufficient.

く作用〉 以上のように、透明高分子フィルム上に防湿層、紫外線
遮断層を従来にない蒸着等のPVD法により形成し、こ
れとヒートシール性を有するオレフィン樹脂層を積層し
た包装材であり、従来のような紫外線吸収剤の内容物へ
の移行したり、包装材表面への浮き出しの危険の全くな
い。従来の紙を包材構成に用いないので、内容物の確認
可能な極めて透明性のある紫外線遮断性をもつ、防湿包
装材を得ることができる。
As described above, this is a packaging material in which a moisture-proof layer and a UV-blocking layer are formed on a transparent polymer film using an unconventional PVD method such as vapor deposition, and this is laminated with an olefin resin layer having heat-sealing properties. There is no risk of the ultraviolet absorber migrating to the contents or embossed on the surface of the packaging material, unlike conventional methods. Since conventional paper is not used in the packaging material structure, it is possible to obtain a moisture-proof packaging material that is extremely transparent and has ultraviolet blocking properties that allow the contents to be confirmed.

〈実施例−1〉 ポリエステルフィルム12μ(音大製NS) 片面に第
1図に示した蒸着機を用いて、連続的に以下の条件で連
続的に酸化マグネシウム、酸化スズをそれぞれ2000
人、1000人になるように蒸着した。
<Example-1> Polyester film 12μ (NS made by Ondai) One side was continuously coated with 2000 ml of each of magnesium oxide and tin oxide under the following conditions using the vapor deposition machine shown in Figure 1.
Vapor deposition was carried out so that there were 1,000 people.

(蒸着条件) 酸化マグネシウム蒸着 真空度 「W @i! K 2.4  X 10−’(Torr 53〜56人/5ee (Static Rate) になるように、 酸化スズ蒸着 電力を連続的に調整。(Vapor deposition conditions) Magnesium oxide vapor deposition vacuum degree “W @i! K 2.4 X 10-' (Torr 53-56 people/5ee (Static Rate) so that tin oxide deposition Continuously adjust power.

真空度 1.8〜2.2 Xl0 (Torr) ように電力を連続的に調整した。Vacuum degree 1.8~2.2Xl0 (Torr) The power was adjusted continuously.

得られた蒸着フィルムを未延伸ポレプロピレン(CPP
)60μ(昭和電工製ショーレックス アロマ−AT)
を下記組成からなる二液硬化型ウレタン系接着剤を用い
てドライラミネートにより積層し、積層包装材料を得た
The obtained vapor-deposited film was coated with unstretched polypropylene (CPP
)60μ (Showa Denko Shorex Aroma-AT)
were laminated by dry lamination using a two-component curing urethane adhesive having the following composition to obtain a laminated packaging material.

〔組成) この積層包材の光線透過率を測定したところ第2図のグ
ラフのようになり、近紫外領域に吸収があり、かつ可視
領域では極めて高透明性を有するものであった。また、
ラミネート強度、及びヒートシール強度を測定したとこ
ろ、十分強度があり実用性のある包装体が得られた。
[Composition] When the light transmittance of this laminated packaging material was measured, it was as shown in the graph of FIG. 2, and it was found to have absorption in the near ultraviolet region and extremely high transparency in the visible region. Also,
When the lamination strength and heat seal strength were measured, a package with sufficient strength and practicality was obtained.

〈実施例2〉 〈実施例1〉と同様に酸化マグネシウムを第1に蒸着し
、次いで銅をスパッタにより、超薄膜形成し、更に該銅
膜上に酸化亜鉛を蒸着し、目的の蒸着フィルムを得た。
<Example 2> As in <Example 1>, magnesium oxide was first vapor-deposited, then copper was formed into an ultra-thin film by sputtering, and zinc oxide was further vapor-deposited on the copper film to form the desired vapor-deposited film. Obtained.

得られた蒸着フィルムの膜組成を知るために、EPMA
で分析したところ、Mg、 Cu、 Znのピークが存
在し、かつ、基材のPETのC10も存在していた。
In order to know the film composition of the obtained vapor-deposited film, EPMA
When analyzed, peaks of Mg, Cu, and Zn were present, and C10 of the base material PET was also present.

更に、酸化マグ7シウム、銅、酸化亜鉛の平均膜厚を高
周波プラズマ発光分析(ICP)により測定したところ
、それぞれ2200 (入) 、21 (入)及び11
00 (人)となった。
Furthermore, when the average film thicknesses of mag7ium oxide, copper, and zinc oxide were measured by high-frequency plasma emission spectrometry (ICP), they were 2200 (in), 21 (in), and 11 (in), respectively.
00 (people).

〈実施例1〉と同様にCPPと積層し、積層包材を得た
。紫外線遮断効果は第2図のグラフに示されるように、
〈実施例−1〉の酸化スズのものより、シャープであり
、より理想的なものとなった、 以上実施例−1,2の包材の透湿度を測定したところ表
1のようになった。
It was laminated with CPP in the same manner as in <Example 1> to obtain a laminated packaging material. As shown in the graph in Figure 2, the UV blocking effect is as follows:
It was sharper and more ideal than the tin oxide material of <Example-1>. The moisture permeability of the packaging materials of Examples-1 and 2 was measured and the results were as shown in Table 1. .

(L−人y−>”i  づト、白) 表 ■ (1)permafran−W6で測定(Modern
 Controls、Inc)(2)インストロン型引
張試験機で測定 unit[g/15mm1    O
: P E T切れΔ:500〜 〈発明の効果〉 以上のように透明性を有する高分子フィルム上に酸化マ
グネシウムから成る防湿層、金属、金属化合物から成る
紫外線遮断層を順次あるいは混合状態として形成するこ
とで、従来の紙を包材構成に用いていることにより生じ
たいた内容物が確認できないという大きな問題点を解決
し、可視領域では透明性を維持したまま、祇、Aj2蒸
着のもつ紫外線遮断効果を付与し、かつ、OPP、KO
P以上の防)品性を有する透明防湿包材材が得られた。
(L-person y->”i zuto, white) Table ■ (1) Measured with permafran-W6 (Modern
Controls, Inc.) (2) Measured with an Instron type tensile tester unit [g/15mm1 O
: PET cutting Δ: 500 ~ <Effects of the invention> As described above, a moisture-proof layer made of magnesium oxide and an ultraviolet blocking layer made of a metal or a metal compound are formed sequentially or in a mixed state on a transparent polymer film. By doing so, we solved the major problem of not being able to see the contents caused by using conventional paper in the packaging material composition, and while maintaining transparency in the visible range, Provides blocking effect and OPP, KO
A transparent moisture-proof packaging material having anti-resistance properties of P or higher was obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の透明防湿包装材料を得るために使用し
た蒸着機の説明図、第2図は、実施例および比較例の紫
外線透過率を示すグラフである。 特  許  出  願  人 凸版印別株式会社 代表者 鈴木和夫 第1図
FIG. 1 is an explanatory diagram of a vapor deposition machine used to obtain the transparent moisture-proof packaging material of the present invention, and FIG. 2 is a graph showing the ultraviolet transmittance of Examples and Comparative Examples. Patent application Kazuo Suzuki Representative of Toppan Inbetsu Co., Ltd. Figure 1

Claims (1)

【特許請求の範囲】[Claims] (1)透明性を有する高分子フィルムの少なくとも片面
に酸化マグネシウム薄膜、及び酸化亜鉛、酸化錫、酸化
鉄、酸化チタンの少なくとも一種からなる金属化合物薄
膜を順次、積層し、更にヒートシール性を有した透明樹
脂層を設けたことを特徴とする透明防湿包装材。
(1) A magnesium oxide thin film and a metal compound thin film consisting of at least one of zinc oxide, tin oxide, iron oxide, and titanium oxide are sequentially laminated on at least one side of a transparent polymer film, and further has heat sealability. A transparent moisture-proof packaging material characterized by being provided with a transparent resin layer.
JP63278359A 1988-11-02 1988-11-02 Transparent moisture-proof packaging material Expired - Fee Related JP2692187B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63278359A JP2692187B2 (en) 1988-11-02 1988-11-02 Transparent moisture-proof packaging material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63278359A JP2692187B2 (en) 1988-11-02 1988-11-02 Transparent moisture-proof packaging material

Publications (2)

Publication Number Publication Date
JPH02122925A true JPH02122925A (en) 1990-05-10
JP2692187B2 JP2692187B2 (en) 1997-12-17

Family

ID=17596239

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63278359A Expired - Fee Related JP2692187B2 (en) 1988-11-02 1988-11-02 Transparent moisture-proof packaging material

Country Status (1)

Country Link
JP (1) JP2692187B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6103321A (en) * 1997-12-17 2000-08-15 Nissin Electric Co., Ltd. Method of manufacturing an ultraviolet resistant object
EP0689962B2 (en) 1994-06-29 2005-07-06 Murakami Kaimeido Co., Ltd Vehicle mirror
WO2018043469A1 (en) * 2016-09-05 2018-03-08 Dic株式会社 Method for producing film for soft packaging

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193841A (en) * 1985-02-22 1986-08-28 積水化学工業株式会社 Manufacture of damp-proof transparent synthetic resin body

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193841A (en) * 1985-02-22 1986-08-28 積水化学工業株式会社 Manufacture of damp-proof transparent synthetic resin body

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0689962B2 (en) 1994-06-29 2005-07-06 Murakami Kaimeido Co., Ltd Vehicle mirror
US6103321A (en) * 1997-12-17 2000-08-15 Nissin Electric Co., Ltd. Method of manufacturing an ultraviolet resistant object
WO2018043469A1 (en) * 2016-09-05 2018-03-08 Dic株式会社 Method for producing film for soft packaging

Also Published As

Publication number Publication date
JP2692187B2 (en) 1997-12-17

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