JPH0577369A - Production of laminated resin film - Google Patents
Production of laminated resin filmInfo
- Publication number
- JPH0577369A JPH0577369A JP3240798A JP24079891A JPH0577369A JP H0577369 A JPH0577369 A JP H0577369A JP 3240798 A JP3240798 A JP 3240798A JP 24079891 A JP24079891 A JP 24079891A JP H0577369 A JPH0577369 A JP H0577369A
- Authority
- JP
- Japan
- Prior art keywords
- vinyl acetate
- ethylene
- film
- acetate copolymer
- base material
- 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
Links
Landscapes
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、マヨネーズ、液体スー
プ、つゆ、シャンプー、生味噌等の包装用資材としてダ
イロース方式の自動充填機での充填適正が良好で、耐圧
強度の優れた積層樹脂フィルムを提供するものである。FIELD OF THE INVENTION The present invention relates to a laminated resin film which is excellent in filling suitability in an automatic filling machine of the die-loose type as a packaging material for mayonnaise, liquid soup, soup, shampoo, and miso and has excellent pressure resistance. Is provided.
【０００２】[0002]
【従来の技術】従来より、液体食品包装に使用される積
層樹脂フィルムは、ラミネート接着性及び充填包装時に
要求されるシール性等から、ナイロン６、ナイロン６，
６等のポリアミドフィルム基材に、低密度ポリエチレン
フィルム層、次いで酢酸ビニル含量が５〜１０重量％の
エチレン−酢酸ビニル共重合体樹脂を溶融押出ラミネー
トした三層積層樹脂フィルムが使用されている〔「プラ
スチックフィルム・レジン材料総覧 '９１（上巻）、」
１０９頁；加工技術研究会刊〕。内容量が１００ｃｃ以
下の包装はダイロール方式の自動充填包装機にてこの三
層積層樹脂フィルムは内面のエチレン−酢酸ビニル共重
合体フィルムがヒートシールされる。2. Description of the Related Art Conventionally, a laminated resin film used for liquid food packaging has nylon 6, nylon 6, nylon 6 and nylon 6, because of its laminating adhesiveness and sealing properties required for filling and packaging.
A low density polyethylene film layer and then a three-layer laminated resin film obtained by melt extrusion laminating an ethylene-vinyl acetate copolymer resin having a vinyl acetate content of 5 to 10% by weight on a polyamide film substrate such as No. 6 are used [ "Plastic Film and Resin Materials Guide '91 (First Volume),"
109 pages; published by Processing Technology Research Group]. For packaging with a content of 100 cc or less, an ethylene-vinyl acetate copolymer film on the inner surface of this three-layer laminated resin film is heat-sealed by a die roll type automatic filling and packaging machine.
【０００３】しかしながら、ポリアミド基材とポリエチ
レン、ポリエチレンとエチレン−酢酸ビニル共重合体樹
脂との接着性及び袋としての耐圧強度が不十分である
為、充填シール後、時間が経つにつれシール強度が低下
し、液漏れが２〜３カ月で発生する。同問題を解決する
方法として、ポリアミド基材に直接エチレン−酢酸ビニ
ル共重合体樹脂フィルムをドライラミネートする方法が
考えられるが、酢酸ビニル含量が６〜１０重量％のエチ
レン−酢酸ビニル共重合体樹脂フィルムを一旦、常温で
保管するため、ブロッキング防止、滑り性付与剤等の添
加剤が該共重合体に含有されている為、ポリアミド基材
との接着性が充分でなくダイロール方式充填機によるヒ
ートシールではシールされた部分の厚みが薄くなりすぎ
耐圧強度が出にくいという欠点がある。However, since the adhesiveness between the polyamide base material and polyethylene and the polyethylene and the ethylene-vinyl acetate copolymer resin and the pressure resistance strength as a bag are insufficient, the sealing strength decreases with time after filling and sealing. However, liquid leakage occurs in 2 to 3 months. As a method for solving the same problem, a method of directly laminating an ethylene-vinyl acetate copolymer resin film on a polyamide substrate can be considered, but an ethylene-vinyl acetate copolymer resin having a vinyl acetate content of 6 to 10% by weight is considered. Since the film is stored at room temperature once, because the copolymer contains additives such as an anti-blocking agent and a slipperiness imparting agent, the adhesiveness with the polyamide substrate is not sufficient and the film is heated by a die roll type filling machine. The seal has a drawback in that the thickness of the sealed portion becomes too thin and it is difficult to obtain pressure resistance.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、エチレン−
酢酸ビニル共重合体樹脂フィルムを接着剤層とし、ポリ
アミド基材及び内層間の接着性に優れかつダイロール方
式の自動充填包装機による充填適正が極めて良好で結果
として耐圧強度の強い積層樹脂フィルムの製造方法を提
供するものである。The present invention is based on ethylene-
Manufacture of a laminated resin film with a vinyl acetate copolymer resin film as an adhesive layer, excellent adhesion between the polyamide substrate and the inner layer, and extremely good filling suitability with a die roll type automatic filling and packaging machine, resulting in high pressure strength. It provides a method.
【０００５】[0005]
【課題を解決するための手段】本発明は、アンカーコー
ト剤を表面に塗布したポリアミド基材（Ａ）に、オゾン
処理を施した酢酸ビニル含量が３〜８重量％のエチレン
−酢酸ビニル共重合体樹脂の溶融フィルム（Ｂ）が、そ
のオゾン処理面が基材のアンカーコート剤処理面側とな
るように圧着ラミネートし、次いで、このエチレン−酢
酸ビニル共重合体（Ｂ）よりも酢酸ビニル含量が２重量
％以上多く、かつ、酢酸ビニル含量が５〜１２重量％の
エチレン−酢酸ビニル共重合体樹脂フィルム（Ｃ）を押
出ラミネートすることを特徴とする積層樹脂フィルムの
製造方法を提供するものである。According to the present invention, a polyamide base material (A) coated with an anchor coating agent on its surface is subjected to ozone treatment, and an ethylene-vinyl acetate copolymer having a vinyl acetate content of 3 to 8% by weight is used. The molten film (B) of the united resin is pressure-laminated so that its ozone-treated surface is the anchor-coating agent-treated surface side of the substrate, and then the vinyl acetate content is higher than that of the ethylene-vinyl acetate copolymer (B). 2% by weight or more and an ethylene-vinyl acetate copolymer resin film (C) having a vinyl acetate content of 5 to 12% by weight is extrusion-laminated, and a method for producing a laminated resin film is provided. Is.
【０００６】[0006]
【作用】基材のポリアミド層（Ａ）をアンカーコート剤
処理し、かつ、これと溶融ラミネートするエチレン−酢
酸ビニル共重合体フィルム接着層（Ｂ）の内面もオゾン
処理されているので、両者の接着が強固となる。更に、
ヒートシール層（Ｃ）には、接着層（Ｂ）のエチレン−
酢酸ビニル共重合体と同種の樹脂を用い、かつ、この共
重合体（Ｃ）の酢酸ビニル含量を（Ｂ）の共重合体のそ
れよりも多くすることにより共重合体（Ｃ）の融点を
（Ｂ）のそれよりより低くすることができ、従来よりよ
り袋のヒートシール強度を向上させることができる。The polyamide layer (A) of the substrate is treated with the anchor coating agent, and the inner surface of the adhesive layer (B) of the ethylene-vinyl acetate copolymer film to be melt-laminated with this is also treated with ozone. Adhesion becomes strong. Furthermore,
The heat-sealing layer (C) contains ethylene-based adhesive layer (B).
By using the same resin as the vinyl acetate copolymer and increasing the vinyl acetate content of the copolymer (C) to be larger than that of the copolymer of (B), the melting point of the copolymer (C) is increased. It can be made lower than that of (B), and the heat-sealing strength of the bag can be improved more than ever before.
【０００７】[0007]
【発明の具体的な説明】本発明において、基材（Ａ）の
ポリアミドとしては、ナイロン６、ナイロン６，６、ナ
イロン６，１０、ナイロン６，１２、ナイロン６，１
４、ナイロン２０等が使用される。基材層の肉厚は８〜
１００μｍ、好ましくは１０〜５０μｍである。DETAILED DESCRIPTION OF THE INVENTION In the present invention, as the polyamide of the substrate (A), nylon 6, nylon 6,6, nylon 6,10, nylon 6,12, nylon 6,1 is used.
4, nylon 20, etc. are used. The thickness of the base material layer is 8 to
It is 100 μm, preferably 10 to 50 μm.
【０００８】基材層（Ａ）は、接着層（Ｂ）のエチレン
−酢酸ビニル共重合体との接着力を向上させるためにポ
リイソシアネート系、チタネート系、ポリエチレンイミ
ン、エチレン・尿素等のアンカーコート剤が固型分量で
０．０５〜８ｇ／ｍ2 の割合で塗布、乾燥される。本発
明において接着層（Ｂ）は、酢酸ビニル含量が３〜８重
量％、好ましくは３〜６重量％でメルトフローレートが
５〜１０ｇ／１０分（ＪＩＳ Ｋ６７６０）でこの接着
層の厚みは１０〜４０μｍである。The base material layer (A) is an anchor coat of polyisocyanate-based, titanate-based, polyethyleneimine, ethylene-urea or the like in order to improve the adhesive strength of the adhesive layer (B) with the ethylene-vinyl acetate copolymer. The agent is applied and dried at a solid content of 0.05 to 8 g / m 2 . In the present invention, the adhesive layer (B) has a vinyl acetate content of 3 to 8% by weight, preferably 3 to 6% by weight, a melt flow rate of 5 to 10 g / 10 minutes (JIS K6760) and a thickness of 10%. Is about 40 μm.
【０００９】酢酸ビニル含量が３重量％未満の場合は、
次いでこの接着層（Ｂ）にラミネートするヒートシール
層（Ｃ）のエチレン−酢酸ビニル共重合体樹脂フィルム
との接着性が不良となり、結果として積層樹脂フィルム
製の袋の耐圧強度が低いものとなる。又、酢酸ビニル含
量が８重量％を越える共重合体はダイロール方式自動充
填機でヒートシールした部分の積層フィルムが薄くな
り、上記同様満足したシール強度が得られず、袋の耐圧
強度が低いものとなる。If the vinyl acetate content is less than 3% by weight,
Then, the heat-sealing layer (C) to be laminated on the adhesive layer (B) has poor adhesion to the ethylene-vinyl acetate copolymer resin film, and as a result, the bag made of the laminated resin film has low pressure resistance. .. For a copolymer having a vinyl acetate content of more than 8% by weight, the laminated film at the portion heat-sealed by a die roll type automatic filling machine becomes thin, and the same satisfactory sealing strength as described above cannot be obtained, and the bag has low pressure resistance. Becomes
【００１０】内層のヒートシール層（Ｃ）は、酢酸ビニ
ル含量が５〜１２重量％、好ましくは６〜１０重量％
で、メルトフローレート（ＭＦＲ）が５〜１０ｇ／１０
分で、前記接着層（Ｂ）のエチレン−酢酸ビニル共重合
体よりも酢酸ビニル含量が２重量％以上多いエチレン−
酢酸ビニル共重合体である。酢酸ビニル含量を接着層
（Ｂ）の共重合体のそれより多くすることにより内層の
ヒートシール層（Ｃ）の共重合体の融点を下げることが
でき、袋のヒートシール強度が向上する。このヒートシ
ール内層（Ｃ）の厚みは３０〜５０μｍである。共重合
体の酢酸ビニル含量が１０重量％を越えると、エチレン
−酢酸ビニル共重合体（Ｃ）の樹脂臭が内容物である液
体へ移行し、及び液体からフィルムへの吸着問題が起き
たり内容物の入った袋をボイル殺菌をする場合袋内面が
融着し、耐圧強度が低下する場合がある。The heat seal layer (C) as the inner layer has a vinyl acetate content of 5 to 12% by weight, preferably 6 to 10% by weight.
And the melt flow rate (MFR) is 5-10g / 10
Of the ethylene-vinyl acetate copolymer having a vinyl acetate content of 2% by weight or more than the ethylene-vinyl acetate copolymer of the adhesive layer (B).
It is a vinyl acetate copolymer. By making the vinyl acetate content higher than that of the copolymer of the adhesive layer (B), the melting point of the copolymer of the inner heat-sealing layer (C) can be lowered, and the heat-sealing strength of the bag is improved. The thickness of the heat seal inner layer (C) is 30 to 50 μm. When the vinyl acetate content of the copolymer exceeds 10% by weight, the resin odor of the ethylene-vinyl acetate copolymer (C) is transferred to the liquid, which is the content, and the adsorption problem from the liquid to the film may occur. When sterilizing a bag containing an object by boiling, the inner surface of the bag may be fused and the pressure resistance may decrease.
【００１１】共重合体（Ｃ）の酢酸ビニル含量が５重量
％未満の場合は、満足したシール強度が得られず、袋の
耐圧強度が低いものとなる。エチレン−酢酸ビニル共重
合体（Ｃ）の５〜２０重量％をエチレン−α−オレフィ
ン共重合体に代えて袋のヒートシール強度、耐圧強度を
高めてもよい。かかるエチレン−α−オレフィン共重合
体樹脂としては、密度０．８５〜０．９０ｇ／ｃｍ3 の
低結晶性乃至非結晶性エチレン−α−オレフィン（炭素
数３〜８）共重合体樹脂が使用できる。When the vinyl acetate content of the copolymer (C) is less than 5% by weight, satisfactory sealing strength cannot be obtained and the bag has low pressure resistance. 5 to 20% by weight of the ethylene-vinyl acetate copolymer (C) may be replaced with an ethylene-α-olefin copolymer to enhance the heat-sealing strength and pressure resistance of the bag. As the ethylene-α-olefin copolymer resin, a low-crystalline or non-crystalline ethylene-α-olefin (C3-8) copolymer resin having a density of 0.85 to 0.90 g / cm 3 is used. it can.
【００１２】α−オレフィンとしてはプロピレン、ブテ
ン−１、ヘキセン−１、ペンテン−１等が利用できる。
ヒートシール層（Ｃ）に、核剤を０．０１〜１重量％、
帯電防止剤、防曇剤を０．０５〜２重量％配合しても良
い。積層樹脂フィルムは、アンカーコート剤が表面に塗
布されたポリアミド基材（Ａ）に、内面をオゾン処理を
施した酢酸ビニル含量が３〜８重量％のエチレン−酢酸
ビニル共重合体樹脂フィルム（Ｂ）を、基材（Ａ）のア
ンカーコート処理面に、接着層（Ｃ）のオゾン処理面が
接するように溶融圧着ラミネートし、ついで、接着層
（Ｃ）の表面に、ヒートシール内層（Ｃ）となる酢酸ビ
ニル含量が５重量％のエチレン−酢酸ビニル共重合体樹
脂フィルムを溶融押出ラミネートすることにより製造さ
れる。As the α-olefin, propylene, butene-1, hexene-1, pentene-1 and the like can be used.
0.01 to 1% by weight of a nucleating agent is added to the heat seal layer (C),
An antistatic agent and an antifogging agent may be blended in an amount of 0.05 to 2% by weight. The laminated resin film is an ethylene-vinyl acetate copolymer resin film (B) having a vinyl acetate content of 3 to 8% by weight, which is obtained by subjecting an inner surface to ozone treatment to a polyamide substrate (A) coated with an anchor coating agent on the surface. ) Is melt-pressed and laminated so that the ozone-treated surface of the adhesive layer (C) is in contact with the anchor-coated surface of the base material (A), and then the heat-seal inner layer (C) is formed on the surface of the adhesive layer (C). It is produced by melt extrusion laminating an ethylene-vinyl acetate copolymer resin film having a vinyl acetate content of 5% by weight.
【００１３】また、接着層（Ｂ）とヒートシール内層
（Ｃ）の共重合体をそれぞれ別々の押出機で溶融混練
し、一台のダイに供給し、これをフィルム状に共押出し
たラミネートの接着層（Ｂ）側をオゾン処理し、つい
で、このラミネートのオゾン処理面を基材（Ａ）のアン
カーコート処理面に溶融圧着することにより製造しても
よい。気体中のオゾン濃度は、３ｇ／ｍ3 以上、好まし
くは５〜３０ｇ／ｍ3 である。Further, the copolymers of the adhesive layer (B) and the heat-seal inner layer (C) are melt-kneaded by separate extruders, respectively, supplied to one die, and co-extruded into a film to obtain a laminate. It may be produced by subjecting the adhesive layer (B) side to ozone treatment and then melt-pressing the ozone treated surface of this laminate to the anchor coat treated surface of the base material (A). Ozone concentration in the gas, 3 g / m 3 or more, preferably from 5 to 30 g / m 3.
【００１４】積層樹脂フィルム（Ａ／Ｂ／Ｃ）の肉厚
は、４８〜１８０μｍ、好ましくは６０〜１２０μｍで
ある。この積層樹脂フィルムより三方シール袋を形成す
るには、例えば図１に示す公知のダイロール方式の自動
充填包装機を用い、積層樹脂フィルム１のヒートシール
内層（Ｃ）側を上側に、基材（Ａ）が下側となるように
積層樹脂フィルム１をガイドロール２に供給し、リード
３により積層樹脂フィルム１を二つ折りし、この二つ折
りした積層樹脂フィルム間に図示していない充填機で内
容物を充填し、縦シールロール４で二つ折りした積層樹
脂フィルムの左端の縦方向をヒートシールする。The laminated resin film (A / B / C) has a wall thickness of 48 to 180 μm, preferably 60 to 120 μm. In order to form a three-way seal bag from this laminated resin film, for example, using a known die roll type automatic filling and packaging machine shown in FIG. 1, the heat-seal inner layer (C) side of the laminated resin film 1 is the upper side, and the base material ( The laminated resin film 1 is supplied to the guide roll 2 so that A) is on the lower side, the laminated resin film 1 is folded in two by the leads 3, and the content is filled between the two folded laminated resin films by a filling machine (not shown). The laminated resin film is filled with the product and folded in half with the vertical seal roll 4, and the left end is heat-sealed in the vertical direction.
【００１５】ついで、横シール６した後、内容物を一定
量充填されたら横シールロール５で横方向にヒートシー
ルし、前記横方向のヒートシール部６をナイフ７でカッ
ティングし、内容物が充填された三方シール袋８を製造
する。Next, after the horizontal sealing 6, after filling a certain amount of the content, heat is laterally sealed by the horizontal sealing roll 5, and the heat sealing portion 6 in the horizontal direction is cut by the knife 7 to fill the content. The three-sided sealed bag 8 is manufactured.
【００１６】[0016]
〔実施例１〕ポリイソシアネート系アンカーコート剤を
固型分量で０．８ｇ／ｍ2 塗布したナイロン−６の二軸
延伸フィルム（Ａ）（肉厚１５μｍ）の前記アンカーコ
ート処理面に、酢酸ビニル含量が５重量％のエチレン−
酢酸ビニル共重合体樹脂（Ｂ）（ＭＦＲが７ｇ／１０
分）を口径が９０ｍｍの押出機に装着したＴダイから、
樹脂温度２４０℃、幅５００ｍｍでフィルム状に押出し
て肉厚３０μｍの溶融薄膜となし、次いで該溶融薄膜の
一方の面に向けて、ダイ下３０ｍｍの位置に設置した幅
５００ｍｍのノズルからオゾン濃度２０ｇ／ｍ3 の空気
を５００リットル／時の量で吹付けることにより、該溶
融薄膜の片面をオゾン処理し、オゾン処理面を接着面と
して圧着ロールで前記ナイロン−６の二軸延伸フィルム
上に圧着ラミネートした。[Example 1] Vinyl acetate was applied to the anchor-coated surface of a nylon-6 biaxially stretched film (A) (wall thickness 15 µm) coated with a polyisocyanate-based anchor coating agent in a solid amount of 0.8 g / m 2. Ethylene content of 5% by weight
Vinyl acetate copolymer resin (B) (MFR is 7 g / 10
Min) from a T-die mounted on an extruder with a diameter of 90 mm,
Extruded into a film at a resin temperature of 240 ° C. and a width of 500 mm to form a molten thin film having a thickness of 30 μm, and then directed toward one surface of the molten thin film from a nozzle having a width of 500 mm installed at a position of 30 mm below the die and having an ozone concentration of 20 g. / M 3 of air is blown at a rate of 500 liters / hour to treat one surface of the molten thin film with ozone, and the ozone-treated surface is used as an adhesive surface for pressure bonding onto the nylon-6 biaxially stretched film with a pressure bonding roll. Laminated.
【００１７】次いで、このラミネート物のエチレン−酢
酸ビニル共重合体樹脂（８）の表面に、酢酸ビニル含量
が８重量％のエチレン−酢酸ビニル共重合体樹脂（Ｃ）
（ＭＦＲが７ｇ／１０分）を２４０℃で３０μｍの膜厚
のフィルム上に押し出し、これを圧着ラミネートをして
三層のラミネート物を得た。得られた三層樹脂フィルム
を小松製作所製自動充填包装機「ＳＫＬ−１０００」
（商品名）にて以下の条件で充填、三方シール袋を作成
した。Then, on the surface of the ethylene-vinyl acetate copolymer resin (8) of this laminate, the ethylene-vinyl acetate copolymer resin (C) having a vinyl acetate content of 8% by weight.
(MFR is 7 g / 10 min) was extruded at 240 ° C. onto a film having a thickness of 30 μm, and this was pressure-bonded to obtain a three-layer laminate. The obtained three-layer resin film is an automatic filling and packaging machine "SKL-1000" manufactured by Komatsu Ltd.
(Product name) was filled under the following conditions to create a three-sided seal bag.
【００１８】内容物：水、内容量：２０ｃｃ 袋寸法：８０×７０ｍｍ 縦シール温度：１７０℃ 横シール温度：１４０℃ 包装スピード：２００個／分Contents: water, content volume: 20 cc Bag size: 80 × 70 mm Vertical sealing temperature: 170 ° C. Horizontal sealing temperature: 140 ° C. Packaging speed: 200 pieces / min
【００１９】得られた三方シール袋のヒートシール部
（イ、ロ、ハ）のシール強度を袋作製後２日後に測定
し、又、袋１０個の耐圧試験を行ない以下の基準で評価
した。（１２０ｋｇ−３分） ◎：１０個全て良好。 ○：８〜９個良好。 △：５〜７個良好。 ×：３〜４個良好。 ××：１０個全て不可。 結果を表１に示す。The sealing strength of the heat-sealed parts (a, b, c) of the obtained three-sided sealed bag was measured 2 days after the bag was manufactured, and a pressure resistance test was performed on 10 bags and evaluated according to the following criteria. (120 kg-3 minutes) A: All 10 pieces are good. Good: 8 to 9 are good. Δ: 5 to 7 are good. X: 3 to 4 are good. XX: Not all 10 pieces. The results are shown in Table 1.
【００２０】〔実施例２〕実施例１で（Ｃ）層共重合体
樹脂８０重量％に密度が０．８９ｇ／ｃｍ3 の低結晶性
エチレン−ブテン−１共重合体樹脂を２０重量％添加し
た他は同一に行って三方ヒートシール袋を得た。Example 2 In Example 1, 20% by weight of a low-crystalline ethylene-butene-1 copolymer resin having a density of 0.89 g / cm 3 was added to 80% by weight of the (C) layer copolymer resin. Otherwise, the same procedure was carried out to obtain a three-way heat-sealed bag.
【００２１】〔実施例３〕実施例１で（Ｂ）層共重合体
樹脂を酢酸ビニル含量が７重量％、（Ｃ）層共重合体樹
脂を酢酸ビニル含量が１０重量％のエチレン−酢酸ビニ
ル共重合体樹脂に変更した他は同一として三方ヒートシ
ール袋を得た。Example 3 In Example 1, the layer (B) layer copolymer resin was a vinyl acetate content of 7% by weight, and the (C) layer copolymer resin was a vinyl acetate content of 10% by weight ethylene-vinyl acetate. A three-way heat-sealed bag was obtained in the same manner except that the copolymer resin was used.
【００２２】〔比較例１〕実施例１で（Ｂ）層共重合体
樹脂を、密度が０．９１８ｇ／ｃｍ3 、ＭＦＲが７ｇ／
１０分の低密度ポリエチレンに変更した他は同一として
三方ヒートシール袋を得た。[Comparative Example 1] The layer (B) layer copolymer resin obtained in Example 1 had a density of 0.918 g / cm 3 and an MFR of 7 g /
A three-way heat-sealed bag was obtained in the same manner except that the low-density polyethylene was changed to 10 minutes.
【００２３】〔比較例２〕実施例１でオゾン処理を行わ
ない他は同一に行って三方ヒートシール袋を得た。Comparative Example 2 A three-way heat-sealed bag was obtained in the same manner as in Example 1 except that the ozone treatment was not performed.
【００２４】〔比較例３〕実施例１で（Ｂ）層共重合体
樹脂を酢酸ビニル含量が１０重量％のエチレン−酢酸ビ
ニル共重合体樹脂に変更した他は同一に行って三方ヒー
トシール袋を得た。Comparative Example 3 A three-way heat-sealing bag was prepared in the same manner as in Example 1 except that the layer (B) layer copolymer resin was changed to an ethylene-vinyl acetate copolymer resin having a vinyl acetate content of 10% by weight. Got
【００２５】〔比較例４〕実施例１で（Ｃ）層共重合体
樹脂を酢酸ビニル含量が３重量％のエチレン−酢酸ビニ
ル共重合体樹脂に変更した他は同一に行って三方ヒート
シール袋を得た。これら三方ヒートシール袋の評価を表
１に示す。[Comparative Example 4] A three-way heat-sealing bag was prepared in the same manner as in Example 1 except that the (C) layer copolymer resin was changed to an ethylene-vinyl acetate copolymer resin having a vinyl acetate content of 3% by weight. Got Table 1 shows the evaluation of these three-way heat-sealed bags.
【００２６】[0026]
【表１】 [Table 1]
【００２７】[0027]
【効果】基材のポリアミド層（Ａ）をアンカーコート剤
処理し、かつ、これと溶融ラミネートするエチレン−酢
酸ビニル共重合体フィルム接着層（Ｂ）の内面もオゾン
処理されているので、両者の接着が強固となる。更に、
ヒートシール層（Ｃ）には、接着層（Ｂ）のエチレン−
酢酸ビニル共重合体と同種の樹脂を用い、かつ、この共
重合体（Ｃ）の酢酸ビニル含量を（Ｂ）の共重合体のそ
れよりも多くすることにより共重合体（Ｃ）の融点を
（Ｂ）のそれよりより低くすることができ、従来よりよ
り袋のヒートシール強度を向上させることができる。[Effect] Since the polyamide layer (A) of the base material is treated with an anchor coating agent, and the inner surface of the ethylene-vinyl acetate copolymer film adhesive layer (B) to be melt-laminated with the same is also ozone-treated, both Adhesion becomes strong. Furthermore,
The heat-sealing layer (C) contains ethylene-based adhesive layer (B).
By using the same type of resin as the vinyl acetate copolymer and increasing the vinyl acetate content of the copolymer (C) to be larger than that of the copolymer of (B), the melting point of the copolymer (C) is increased. It can be made lower than that of (B), and the heat-sealing strength of the bag can be improved more than ever before.
【図１】ダイロール方式の自動充填包装機を用いて三方
ヒートシール袋を製造する工程を示すフローシート図で
ある。FIG. 1 is a flow sheet diagram showing a process of producing a three-way heat-sealing bag using a die roll type automatic filling and packaging machine.
１ 積層樹脂フィルム ２ ロール ３ リード ４ 縦シールロール ５ 横シールロール ６ シール部 ７ ナイフ ８ 三方シール袋 1 Laminated resin film 2 Roll 3 Lead 4 Vertical seal roll 5 Horizontal seal roll 6 Seal part 7 Knife 8 Three-sided seal bag
Claims (1)
アミド基材（Ａ）に、オゾン処理を施した酢酸ビニル含
量が３〜８重量％のエチレン−酢酸ビニル共重合体樹脂
の溶融フィルム（Ｂ）が、そのオゾン処理面が基材のア
ンカーコート剤処理面側となるように圧着ラミネート
し、次いで、このエチレン−酢酸ビニル共重合体（Ｂ）
よりも酢酸ビニル含量が２重量％以上多く、かつ、酢酸
ビニル含量が５〜１２重量％のエチレン−酢酸ビニル共
重合体樹脂フィルム（Ｃ）を押出ラミネートすることを
特徴とする積層樹脂フィルムの製造方法。1. A molten film (B) of an ethylene-vinyl acetate copolymer resin having a vinyl acetate content of 3 to 8% by weight, which is obtained by subjecting a polyamide base material (A) coated with an anchor coating agent to the surface thereof and subjecting it to ozone treatment. Of the ethylene-vinyl acetate copolymer (B) by pressure-bonding so that the ozone-treated surface of the substrate is the anchor-coating agent-treated surface side of the substrate.
Of an ethylene-vinyl acetate copolymer resin film (C) having a vinyl acetate content of 2% by weight or more and a vinyl acetate content of 5 to 12% by weight, which is produced by extrusion laminating. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3240798A JPH0577369A (en) | 1991-09-20 | 1991-09-20 | Production of laminated resin film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3240798A JPH0577369A (en) | 1991-09-20 | 1991-09-20 | Production of laminated resin film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0577369A true JPH0577369A (en) | 1993-03-30 |
Family
ID=17064848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3240798A Pending JPH0577369A (en) | 1991-09-20 | 1991-09-20 | Production of laminated resin film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0577369A (en) |
-
1991
- 1991-09-20 JP JP3240798A patent/JPH0577369A/en active Pending
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