JPS6183038A - Coextruded multilayer film for packaging - Google Patents
Coextruded multilayer film for packagingInfo
- Publication number
- JPS6183038A JPS6183038A JP18518285A JP18518285A JPS6183038A JP S6183038 A JPS6183038 A JP S6183038A JP 18518285 A JP18518285 A JP 18518285A JP 18518285 A JP18518285 A JP 18518285A JP S6183038 A JPS6183038 A JP S6183038A
- Authority
- JP
- Japan
- Prior art keywords
- bag
- packaging
- multilayer film
- coextruded multilayer
- surfactant
- 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.)
- Pending
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Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は防曇効果を奏すると共に製袋機械適性、包装機
械適性、印刷適性を備えた包装用共押出多層フィルムに
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coextruded multilayer film for packaging that exhibits an antifogging effect and is suitable for bag making machines, packaging machines, and printing.
一般に含水性食品を包装する包装袋においては１食品中
に含有される水分あるいは食品表面に付着した水分によ
りて袋内面が水ｍＫよる曇ルを生じ外観等に悪影響が生
ずる。この現象は一般に含水性食品包装用に用いられる
袋内面がポリオレフィンからなっており、ポリオレフィ
ンが疎水性であることに起因している。すなわちこれら
包装材料によって包装された含水性食品包装袋において
は、温度、湿度等の変化に応じて水分が袋内面に水滴と
して凝結し、しかも表面を均一に／１らすことなく細か
な水滴として凝結するため袋全面にわたりて曇りを生ず
る。Generally, in packaging bags for packaging water-containing foods, the inner surface of the bag becomes cloudy due to water mK due to moisture contained in the food or moisture adhering to the surface of the food, which adversely affects the appearance. This phenomenon is caused by the fact that the inner surface of bags generally used for packaging water-containing foods is made of polyolefin, and polyolefin is hydrophobic. In other words, in water-containing food packaging bags packaged with these packaging materials, moisture condenses as water droplets on the inner surface of the bag in response to changes in temperature, humidity, etc., and does not form evenly on the surface as fine water droplets. Due to condensation, the entire bag becomes cloudy.
このような袋を用いて含水性食品を包装したばあいには
水滴によるａｂが生じ外観上不透明となり、それ故内容
物が見にくくなり、商品価値を低下させ【しまう。これ
らの不透明になる現象すなわち曇化性を改善するためＫ
はポリオレフィン樹脂にポリオレフィン樹脂との相溶性
の比較的よい界面活性剤を混練したものをフィルム成形
するかあるいは前記界面活性剤を袋内面となる面にコー
ディングすることが一般的である。When such a bag is used to package a water-containing food, water droplets cause ab and the bag becomes opaque in appearance, making it difficult to see the contents and lowering the product value. In order to improve these opaque phenomena, that is, cloudiness, K
Generally, a polyolefin resin is kneaded with a surfactant having relatively good compatibility with the polyolefin resin and then formed into a film, or the surfactant is coated on the inner surface of the bag.
しかし５以上のような処置をしたフィルムを用いて含水
性食品等を包装しようとすると界面活性剤のために柔軟
性、粘着性があシ製袋時には機械適性、シール適性が劣
り製袋後も袋同志が粘着し、包装機Ｋかかシにくいとい
う欠点があった。However, if you try to package water-containing foods using a film that has been treated as above 5, it will be soft and sticky due to the surfactant, and the mechanical suitability and sealability will be poor during bag making, and even after bag making. There was a drawback that the bags were sticky and difficult to push through the packaging machine.
さらに、ポリオレフィン樹脂にポリオレフィン樹脂との
相溶性の比較的良い界面活性剤を混練したものをフィル
ム成形したものよシなる袋では界面活性剤が袋内面より
も袋外面にグリ−ドアウドあるいはブルームアウトしや
すいため袋内面の防曇性が低下する欠点があった。特に
袋外面を印刷するために印刷インキとの密着性を増すた
めの表面処理を行なうと上記の現象が顕著にあられれ、
袋内面のＶ５ＩＩｈ性が更に低下するのみならず、印刷
インキと袋外面との密着性を阻害し、印刷インキの剥離
あるいはプロ、キングが発生しやすくなる欠点があった
。Furthermore, in bags made by kneading polyolefin resin with a surfactant that has relatively good compatibility with the polyolefin resin and forming a film, the surfactant tends to grease or bloom out on the outside of the bag rather than on the inside of the bag. This has the disadvantage that the anti-fogging properties of the inner surface of the bag deteriorate. In particular, when surface treatment is performed to increase adhesion with printing ink for printing on the outer surface of the bag, the above phenomenon becomes noticeable.
This not only further deteriorates the V5IIh property of the inner surface of the bag, but also impairs the adhesion between the printing ink and the outer surface of the bag, resulting in the disadvantage that peeling of the printing ink or bulging and kinging are more likely to occur.
そこで本発明が解決しようとする問題点は防曇効果を奏
すると共に製袋機械適性、包装機械適性、印刷適性を備
えた 、包装用共押・出多層フィルムを提
供することにある。Therefore, the problem to be solved by the present invention is to provide a coextrusion/extrusion multilayer film for packaging that exhibits an antifogging effect and is suitable for bag making machines, packaging machines, and printing.
本発明者らは上記の問題点を解決すべく研究の結果、ポ
リオレフィン系樹脂よυなる多層を共押出し、且つ袋内
側層をポリオレフィン系樹脂と防曇効果を奏する界面活
性剤の混線物によ多形成することにより、従来の防曇フ
ィルムの機械適性、シール適性が劣る欠点を解決するこ
とができ、又、袋外面への界面活性剤のブリードアウト
、ブルームアウトを防止し、袋内面のみが防曇性を有し
、かつ種々の機械適性、印刷適性を持った包装用共押出
多層フィルムを得ることができることを見いだし、かか
る知見にもとづいて本発明を完成したものである。As a result of research to solve the above problems, the present inventors coextruded multiple layers of polyolefin resin, and the inner layer of the bag was made of a mixture of polyolefin resin and a surfactant that has an antifogging effect. By forming multiple layers, it is possible to solve the drawbacks of conventional anti-fogging films, such as poor mechanical suitability and sealing suitability.It also prevents bleed-out and bloom-out of the surfactant on the outside of the bag, and allows only the inside of the bag to be coated. We have discovered that it is possible to obtain a coextruded multilayer film for packaging that has antifogging properties and has various machine and print aptitudes, and based on this knowledge, we have completed the present invention.
本発明の包装用共押出多層フィルムは共押出多層フィル
ムにおいて１袋内側層がポリオレフィン系樹脂と防曇効
果を奏する界面活性剤の混線物よシなるものである。The coextruded multilayer film for packaging of the present invention is a coextruded multilayer film in which the inner layer of one bag is a mixture of a polyolefin resin and a surfactant exhibiting an antifogging effect.
以下、上記の本発明について詳ｍＫ説明する。Hereinafter, the above-mentioned present invention will be explained in detail.
まず、本発明に係る包装用共押出多層フィルムについて
図面を用いて説明する。第１図は本発明のポリオレフィ
ン系包装用共押出多層フィルムの１例を示す断面図であ
る。この包装用共押出多層フィルム（３）は防曇効果を
有する界面活性剤を混練したポリエチレン、ポリプロピ
レン等のポリオレフィン系樹脂よりなる袋内側層（１）
と防曇効果を有する界面活性剤を混練してない前記袋内
側層の樹脂とは密度が異なるポリエチレン、ポリプロピ
レン等のポリオレフィン系樹脂よシなる袋外側層（２）
を共押出し成膜装置によシ共押出してなるものであるう
而して本発明において袋内側層が防曇効果のある界面活
性剤を混練した密度０．９１７〜０．９３２ｙＡのポリ
エチレンよシなシ袋外側層に使用したポリエチレンより
高密度のポリエチレンよシなる場合、特に良好な防曇性
、機械適性、印刷適性の長期安定化の効果が奏せられる
ものである。袋内側層に使用するポリエチレンは、密度
０、９１７ ＰＡｒ、未満であると袋にしたさいの十分
なシール強度が得られず、また０、 ９３２ Ｐ／ｍ以
上であると結晶性が高過ぎ所望の防曇性を発現させるた
めの界面活性剤が混線できず、また融点が高く、成膜時
に界面活性剤が熱劣化分解を起こし所望の防曇性が得ら
れない。First, the coextruded multilayer film for packaging according to the present invention will be explained using the drawings. FIG. 1 is a sectional view showing an example of the polyolefin-based coextruded multilayer film for packaging of the present invention. This coextruded multilayer film for packaging (3) has an inner bag layer (1) made of a polyolefin resin such as polyethylene or polypropylene mixed with a surfactant that has an antifogging effect.
and a bag outer layer (2) made of a polyolefin resin such as polyethylene or polypropylene, which has a density different from that of the resin of the bag inner layer, which is not kneaded with a surfactant having an antifogging effect.
Therefore, in the present invention, the inner layer of the bag is made of polyethylene having a density of 0.917 to 0.932 yA mixed with a surfactant having an antifogging effect. When the polyethylene used for the outer layer of the bag is made of polyethylene having a higher density, particularly good antifogging properties, long-term stabilization of machine suitability and printability can be achieved. If the density of the polyethylene used for the inner layer of the bag is less than 0.917 PAr, sufficient sealing strength will not be obtained when the bag is made, and if the density is 0.932 P/m or more, the crystallinity will be too high as desired. The surfactant for developing antifogging properties cannot be cross-contaminated and has a high melting point, so the surfactant undergoes thermal decomposition during film formation, making it impossible to obtain the desired antifogging properties.
また１袋内側層が防曇効果のある界面活性剤を混練した
エチレン−酢酸ビニル共重合体、エチレン−アクリル酸
共重合体またはアイオノマー樹脂よシなり、袋外側層が
ポリエチレンよプなる共押出多層フィルムを用いた場合
も、また。In addition, the inner layer of each bag is made of ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, or ionomer resin kneaded with a surfactant that has an antifogging effect, and the outer layer of the bag is made of polyethylene. Also when using film.
袋内側層が防曇効果のある界面活性剤を混練したオレフ
ィン重合体を不飽和ジカルボン酸またはその無水物を付
加重合あるいは共重合させたポリオレフィンよ）なプ、
袋外側層がポリエチレン、ポリプロピレン等のポリオレ
フィンよシなる共押出多層フィルムを用いた場合も良好
な効果を示した。The inner layer of the bag is a polyolefin made by addition polymerizing or copolymerizing an olefin polymer kneaded with a surfactant that has an antifogging effect and an unsaturated dicarboxylic acid or its anhydride.
Good effects were also shown when the outer layer of the bag was a coextruded multilayer film made of polyolefin such as polyethylene or polypropylene.
上記において袋内側層に用いられる界面活性剤としては
各糧のものが考えられるが１本発明陽射りて適用できる
ものとしては非イオン系界面活性剤である。ンルビタン
脂肪酸エステル、ポリオキシエチレンソルビクン脂肪ｆ
ｉエステル・、ポリオキンエチレン脂肪酸エステル、グ
リセリン脂肪酸エステル、オキシエチレン・オキνプロ
ピレンブロックボリマー、ポリオキシエチレンアルキル
エーテル、ポリオキンエチレンアルキルフェノールエー
テル等が考えられる。このうち脂肪酸エステルの酸基に
ついてはラウリン酸、パルミチン酸、ステアリン酸、オ
レイン酸等が一般的であるが、防曇効果の発現効果によ
って、上記各酸基のついた脂肪酸エステルが用いられる
。また、エーテルについては一般ニエチレンオキサイド
の付加モル数によって防曇効果が調節できるが、通常は
４〜１０の付加モル数のものが用いられる。In the above, various kinds of surfactants can be considered as the surfactant used in the bag inner layer, but one that can be particularly applied in the present invention is a nonionic surfactant. polyoxyethylene sorbicun fatty acid ester, polyoxyethylene sorbicun fatty acid f
Possible examples include i ester, polyoxine ethylene fatty acid ester, glycerin fatty acid ester, oxyethylene/oxyv propylene block polymer, polyoxyethylene alkyl ether, polyoxine ethylene alkyl phenol ether, and the like. Among these, the acid groups of fatty acid esters are generally lauric acid, palmitic acid, stearic acid, oleic acid, etc., but fatty acid esters with each of the above acid groups are used depending on the effect of developing an antifogging effect. The antifogging effect of ether can be adjusted by changing the number of moles of niethylene oxide added, but ethers with a number of moles of 4 to 10 are usually used.
また、各脂肪酸エステル同志の混合あるいヲキエーテル
同志の混合、さらには脂肪酸エステルとエーテル同志の
混合も本発明において適用できる。Further, mixtures of fatty acid esters, mixtures of ethers, and mixtures of fatty acid esters and ethers can also be applied in the present invention.
一方、上記非イオン性界面活性剤を混練すべきポリオレ
フィン樹脂としては、ポリエチレン。On the other hand, the polyolefin resin to be kneaded with the nonionic surfactant is polyethylene.
ボリプＳピレン、エチレン酢酸ビニル共重合体、エチレ
ン−アクリル酸共重体、エチレンα−オレフィン共重合
体、ポリ１．２−ブタジェンあるいは上記各樹脂に不飽
和ジカルボン酸またはその無水物を付加あるいは共重合
させた樹脂又はアイオノマー樹脂等の各樹脂が用いられ
る。Addition or copolymerization of unsaturated dicarboxylic acid or its anhydride to Polyp S pyrene, ethylene vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene α-olefin copolymer, poly 1,2-butadiene, or each of the above resins. Various resins such as ionomer resins or ionomer resins are used.
上記非イオン性界面活性剤の全体に対する混合割合は、
０．１〜５重量％、好ましくは０．５〜２重量−である
。非イオン界面活性剤が５重量％よ〕多いと防曇性は良
好であるがフィルムにべと付きが生じ、成膜後の製袋時
におけるヒートンール性等に悪影響を及ぼす。また、０
．１重量−より少ないと所望の防曇性を発現させること
ができない。また１両者の混合方法は、あらかじめバン
バリーミキサ−等で両者をメルトブレンドし、マスター
バッチ化した本のを所定の混合比にする方法、あるいは
樹脂ベレットとの直接混合方式のどちらでもかまわない
。このような非イオン性界面活性剤を混練した袋内側層
のポリオレフィンが所□定の防曇性を発現させるために
は袋内側層の厚みがフィルム全体の厚みのＩＡ以上であ
ることが必要とされ、また２ハより厚くなると不必要な
量の界面活性剤のブリードアウト・ブルームアウトが起
きシール性に悪影響を与える等の現象が出るため好まし
くない。The mixing ratio of the above nonionic surfactant to the whole is:
0.1 to 5% by weight, preferably 0.5 to 2% by weight. If the amount of nonionic surfactant is more than 5% by weight, the antifogging properties are good, but the film becomes sticky, which adversely affects the heat roll properties during bag making after film formation. Also, 0
．． If it is less than 1 weight, the desired antifogging property cannot be achieved. The method for mixing the two may be either a method of melt-blending the two in advance using a Banbury mixer or the like and adjusting a masterbatch to a predetermined mixing ratio, or a method of directly mixing with a resin pellet. In order for the polyolefin of the bag inner layer kneaded with such a nonionic surfactant to exhibit the desired antifogging properties, the thickness of the bag inner layer must be greater than or equal to the IA of the entire film thickness. Moreover, if it is thicker than 2mm, an unnecessary amount of surfactant will bleed out or bloom out, which will adversely affect the sealing performance, which is not preferable.
第１図示の実施態様はポリオレフィン系樹脂と防曇効果
を奏する界面活性剤の混練物よシなる袋内側層に対して
前記袋内側層の樹脂と密度が異なるポリオレフィン系樹
脂よシなる袋外側層を直接設けた例であるが、前記内層
に対して中間層を介して前記袋内側層の樹脂と密度が異
なるポリオレフィン系樹脂よりなる外層を共押′″ 比
形成しても良い。或いは中間の一層を前記袋内側層の樹
脂と密度が異なるポリオレフィン系樹脂で構成しても良
い。In the embodiment shown in the first diagram, the bag inner layer is made of a kneaded mixture of a polyolefin resin and a surfactant that exhibits an antifogging effect, and the bag outer layer is made of a polyolefin resin having a density different from that of the resin of the bag inner layer. In this example, an outer layer made of a polyolefin resin having a density different from that of the resin of the bag inner layer may be formed by co-extrusion with the inner layer via an intermediate layer. One layer may be composed of a polyolefin resin having a density different from that of the resin of the bag inner layer.
包装用フィルムを共押出多層フィルムとし、袋内側層の
みに防う剤を入れることにより機械適性の低下、シール
適性の低下といった欠点が解消されるつ又、袋外面と印
刷インキ層との密着性が悪く、印刷インキの剥離あるい
はプロ。By using a coextruded multilayer film as the packaging film and adding a protective agent only to the inner layer of the bag, disadvantages such as reduced mechanical suitability and sealing suitability are eliminated, and the adhesion between the outer surface of the bag and the printing ink layer is improved. Bad printing ink peeling or professional.
キングが発生しやすいという欠点も解消される。The drawback that kings are likely to occur is also eliminated.
実施例１
密度０．９２１ Ｐ／ｃｄのポリエチレン１００部にオ
レイン酸モノグリセライド１．２部、ポリオキンエチレ
ンノニルエーテルフェニル０．１ｍ、及びポリエチレン
グリコール０，３部を混練した混線物と密度０．９３０
Ｐ／ｃｄのポリエチレンを共押出して、前記混練物よ
りなる袋内側層（２０μ）／密度０．９３０９／＋Ｊの
ポリエチレンよルなる袋外側層（３０μ）の層構成の包
装用共押出多層フィルムを得た。Example 1 A mixed wire product obtained by kneading 100 parts of polyethylene with a density of 0.921 P/cd, 1.2 parts of oleic acid monoglyceride, 0.1 m of polyoxene ethylene nonyl ether phenyl, and 0.3 parts of polyethylene glycol, and a density of 0.930
P/cd polyethylene is coextruded to produce a coextruded multilayer film for packaging having a layer structure of a bag inner layer (20μ) made of the kneaded product and a bag outer layer (30μ) made of polyethylene with a density of 0.9309/+J. Obtained.
実施例２
エチレン−酢酸ビニル共重合体（酢ビ含量５重量％）１
００部にオレイン酸モノグリセライ）’１．２Ｎ、ポリ
オキンエチレンノニルエーテルフェニル０．１物、及び
ポリエチレングリコール０．３部を混練した混練物と密
度０．９ ｚ ２ ｙ／ｃＩｌのポリエチレンを共押出
して、前記混線物よりなる袋内側層（２０μ）／密度０
．９２２ ＶａＡのポリエチレン（３０μ）の層構成の
包装用共押出多層フィルムを得た。Example 2 Ethylene-vinyl acetate copolymer (vinyl acetate content 5% by weight) 1
A kneaded product obtained by kneading 0.00 parts of oleic acid monoglyceride)' 1.2N, 0.1 part of polyoxine ethylene nonyl ether phenyl, and 0.3 parts of polyethylene glycol was coextruded with polyethylene having a density of 0.9 z 2 y/cIl. Then, the bag inner layer (20μ)/density 0 made of the above-mentioned cross-conductor
．． A coextruded multilayer film for packaging with a layer structure of polyethylene (30μ) of 922 VaA was obtained.
実施例３
実施例１で得たフィルムの袋外側面にコロナ処理を施こ
した。Example 3 The outer surface of the bag of the film obtained in Example 1 was subjected to corona treatment.
実施例４
密度０．９２２ Ｐ／ａＪのポリエチレン１００部ｇオ
レイン酸モノグリセライド１．２部、ポリオキンエチレ
ンノニルエーテルフェニル０．１１ｉ１５．及びポリエ
チレングリコール０．３部を混練した混：′：出して、
前記混線物よりなる袋内側層（２０μ）／密度０．９２
２ Ｆ／ｃｄのポリエチレンよりなる袋外側層（３０μ
）の層構成の包装用共押出多層フィルムを得た。Example 4 100 parts of polyethylene with a density of 0.922 P/aJ, 1.2 parts of oleic acid monoglyceride, 0.11i15. A mixture of 0.3 parts of polyethylene glycol and 0.3 parts of polyethylene glycol was taken out.
Bag inner layer (20μ)/density 0.92 made of the above-mentioned mixed material
Bag outer layer (30μ
) A coextruded multilayer film for packaging was obtained.
実施例１．２．３及び４のフィルムにっき防曇性の試験
を行なった。The films of Examples 1, 2, 3 and 4 were tested for antifogging properties.
防曇性の試験結果（１″）
（注ｌ）防曇性は２００＋ｗ７ビ一カー１ｃ３５℃の水
１００ＴＩＬｔを入れ、そのビーカーを検ｉｔべきフィ
ルムで覆い、５℃テ１０
分間冷却後のビーカーに対面するフィ
ルム面の結露状態を調べて評価したつ
優・・・・・・全面一様ＩＣ濡れている。Anti-fog test results (1") (Note 1) Anti-fog properties are 200 + W7. Pour 1 c. The condition of condensation on the facing film surface was examined and evaluated.The entire surface of the IC was uniformly wet.
良・・・・・・８割以上濡れている。Good: More than 80% wet.
可・・・・・・６割以上濡れている。Acceptable: More than 60% wet.
不可・・・細かい水滴が付着し曇っている。Impossible: Cloudy with small water droplets attached.
以上、詳記した通り、本発明に係る包装用共押出多層フ
ィルムは２層以上の共押出多層フィなるので、袋内側層
が防曇性を有するのみならず１袋内側層のみに界面活性
剤を入れたので製袋機械適性、包装機械適性が良好に保
持され、又、袋内側層よシも外側の層によシ袋外面へ界
面活性剤が移行することが抑制されるという利点を有す
るものである。As detailed above, since the coextruded multilayer film for packaging according to the present invention is a coextruded multilayer film with two or more layers, not only the inner bag layer has antifogging properties, but also the inner layer of each bag contains surfactant. The bag-making machine suitability and packaging machine suitability are maintained well, and the bag has the advantage that migration of the surfactant from the inner layer to the outer layer to the outer surface of the bag is suppressed. It is something.
第１図は本発明の包装用共押出多層フィルムの断面図で
ある。FIG. 1 is a cross-sectional view of a coextruded multilayer film for packaging according to the present invention.
Claims (3)
層がポリオレフィン系樹脂と防曇効果を奏する界面活性
剤の混練物よりなることを特徴とする包装用共押出多層
フィルム。(1) A coextruded multilayer film for packaging having two or more layers, wherein the bag inner layer is made of a kneaded mixture of a polyolefin resin and a surfactant exhibiting an antifogging effect.
ィン系樹脂よりなることを特徴とする特許請求の範囲第
１項記載の包装用共押出多層フィルム。(2) The coextruded multilayer film for packaging according to claim 1, wherein each layer constituting the coextruded multilayer film is made of a polyolefin resin.
１／６〜２／３である特許請求の範囲第１項又は第２項
記載の包装用共押出多層フィルム。(3) The coextruded multilayer film for packaging according to claim 1 or 2, wherein the thickness of the bag inner layer is 1/6 to 2/3 of the total thickness of the coextruded multilayer film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18518285A JPS6183038A (en) | 1985-08-23 | 1985-08-23 | Coextruded multilayer film for packaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18518285A JPS6183038A (en) | 1985-08-23 | 1985-08-23 | Coextruded multilayer film for packaging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6183038A true JPS6183038A (en) | 1986-04-26 |
Family
ID=16166275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18518285A Pending JPS6183038A (en) | 1985-08-23 | 1985-08-23 | Coextruded multilayer film for packaging |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6183038A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6372545A (en) * | 1986-09-16 | 1988-04-02 | 東レ株式会社 | Packaging bag |
| US5302327A (en) * | 1991-12-24 | 1994-04-12 | Mobil Oil Corporation | Process for making coated polypropylene film |
| JP2018052533A (en) * | 2016-09-27 | 2018-04-05 | 大日本印刷株式会社 | Packaging material for hydrous content and manufacturing method of the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51116883A (en) * | 1975-04-07 | 1976-10-14 | Nippon Petrochem Co Ltd | A process for manufacturing a multi-layer thermoplastic film |
| JPS5619754A (en) * | 1979-07-27 | 1981-02-24 | Dainippon Printing Co Ltd | Cooextrusion multilayer film for packing |
-
1985
- 1985-08-23 JP JP18518285A patent/JPS6183038A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51116883A (en) * | 1975-04-07 | 1976-10-14 | Nippon Petrochem Co Ltd | A process for manufacturing a multi-layer thermoplastic film |
| JPS5619754A (en) * | 1979-07-27 | 1981-02-24 | Dainippon Printing Co Ltd | Cooextrusion multilayer film for packing |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6372545A (en) * | 1986-09-16 | 1988-04-02 | 東レ株式会社 | Packaging bag |
| JPH0358597B2 (en) * | 1986-09-16 | 1991-09-05 | Toray Industries | |
| US5302327A (en) * | 1991-12-24 | 1994-04-12 | Mobil Oil Corporation | Process for making coated polypropylene film |
| EP0549234B1 (en) * | 1991-12-24 | 2000-06-07 | Mobil Oil Corporation | Polypropylene film and process for making same |
| JP2018052533A (en) * | 2016-09-27 | 2018-04-05 | 大日本印刷株式会社 | Packaging material for hydrous content and manufacturing method of the same |
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