JPH0241239A - Packaging multilayer film and manufacture thereof - Google Patents
Packaging multilayer film and manufacture thereofInfo
- Publication number
- JPH0241239A JPH0241239A JP19225388A JP19225388A JPH0241239A JP H0241239 A JPH0241239 A JP H0241239A JP 19225388 A JP19225388 A JP 19225388A JP 19225388 A JP19225388 A JP 19225388A JP H0241239 A JPH0241239 A JP H0241239A
- Authority
- JP
- Japan
- Prior art keywords
- film
- carboxylic acid
- unsaturated carboxylic
- ethylene
- deposited
- 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
Links
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000004743 Polypropylene Substances 0.000 claims abstract description 37
- 229920001577 copolymer Polymers 0.000 claims abstract description 37
- 229920001155 polypropylene Polymers 0.000 claims abstract description 37
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000005977 Ethylene Substances 0.000 claims abstract description 29
- 238000001125 extrusion Methods 0.000 claims abstract description 25
- -1 polypropylene Polymers 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 24
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims abstract description 14
- 239000000155 melt Substances 0.000 claims abstract description 10
- 238000010030 laminating Methods 0.000 claims abstract description 4
- 238000003475 lamination Methods 0.000 claims description 29
- 229920006281 multilayer packaging film Polymers 0.000 claims description 8
- 150000001733 carboxylic acid esters Chemical class 0.000 claims description 4
- 239000010408 film Substances 0.000 description 82
- 229920005989 resin Polymers 0.000 description 27
- 239000011347 resin Substances 0.000 description 27
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 17
- 239000010410 layer Substances 0.000 description 17
- 229910052782 aluminium Inorganic materials 0.000 description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 7
- 230000008961 swelling Effects 0.000 description 7
- CFVWNXQPGQOHRJ-UHFFFAOYSA-N 2-methylpropyl prop-2-enoate Chemical compound CC(C)COC(=O)C=C CFVWNXQPGQOHRJ-UHFFFAOYSA-N 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000007765 extrusion coating Methods 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 229920006378 biaxially oriented polypropylene Polymers 0.000 description 3
- 239000011127 biaxially oriented polypropylene Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000011104 metalized film Substances 0.000 description 3
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 239000011342 resin composition Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000012793 heat-sealing layer Substances 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229920003145 methacrylic acid copolymer Polymers 0.000 description 2
- 229940117841 methacrylic acid copolymer Drugs 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- JHPBZFOKBAGZBL-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylprop-2-enoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)=C JHPBZFOKBAGZBL-UHFFFAOYSA-N 0.000 description 1
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
- 241000726096 Aratinga Species 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229920006222 acrylic ester polymer Polymers 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- QHZOMAXECYYXGP-UHFFFAOYSA-N ethene;prop-2-enoic acid Chemical compound C=C.OC(=O)C=C QHZOMAXECYYXGP-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229920003146 methacrylic ester copolymer Polymers 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005026 oriented polypropylene Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 235000011888 snacks Nutrition 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
発明の技術分野
本発明は、金属蒸着ポリプロピレン層を有する包装用多
層フィルムおよびその製法に関する。さららに詳しくは
、金属蒸着ポリプロピレンフィルムの金属蒸着面側に、
特定の樹脂を押出ラミネーｊ・、好ましくはサンドイッ
チラミネートしてなる包装用多層フィルムおよびその製
法に関する。TECHNICAL FIELD OF THE INVENTION The present invention relates to a multilayer packaging film having a metallized polypropylene layer and a method for making the same. More specifically, on the metal-deposited side of the metal-deposited polypropylene film,
The present invention relates to a multilayer packaging film formed by extrusion lamination, preferably sandwich lamination, of a specific resin, and a method for producing the same.
発明の技術的背景ならびにその問題点
現在、ポリプロピレン（ＰＰ） 、ポリエチレンテレフ
タレーｌ〜（ＰＥＴ）等のプラスチックフィルム上にア
ルミニウム等の金属を蒸着してなる金属蒸着フィルム上
に、オレフィン系樹脂等を押出ラミネートすることによ
り、多種の積層フィルムが製造されている。これらのフ
ィルムは、カスバリヤー性、遮光性に優れ、かつ金属光
沢があるところから、食品等の包装材料として広く用い
られている。このような積層フィルムとしては、具体的
には、アルミ蒸着ＰＰフィルム／ＰＰフィルムのような
２層フィルム、アルミ蒸着ＰＰフィルム／樹脂、／ Ｐ
Ｐフィルムのような３層フィルムなどのように単純な
構成の積層フィルムから、ＰＰフィルム／Ｖ１１脂／ア
ルミ蒸着ＰＥＴフィルム／樹脂／ＰＰフィルムのような
５層構成の積層フィルムのように複雑な構成の積層フィ
ルムまで種々あり、これらの積層フィルムの各層間には
必要に応じてアンカーコート剤がｆ吏われている。Technical background of the invention and its problems At present, olefin resins, etc., are deposited on metal-deposited films made by depositing metals such as aluminum on plastic films such as polypropylene (PP) and polyethylene terephthalate (PET). Various types of laminated films are manufactured by extrusion lamination. These films are widely used as packaging materials for foods and the like because they have excellent gas barrier properties and light-shielding properties, and have a metallic luster. Specifically, such laminated films include two-layer films such as aluminum vapor-deposited PP film/PP film, aluminum vapor-deposited PP film/resin, and /P.
From simple laminated films such as 3-layer films such as P film to complex laminated films such as 5-layer laminated films such as PP film/V11 resin/aluminized PET film/resin/PP film. There are various kinds of laminated films, and an anchor coating agent is applied between each layer of these laminated films as necessary.
アルミニウムなどの金属を基若させてなる金属蒸着フィ
ルム上に樹脂層などが設けられた積層フィルムを、押出
ラミネートにより製造するに際しては、押出加工性のす
ぐれた樹脂を選定することは勿論重要なことであるか、
同時に金属蒸着面側と良好な接着力を有する樹脂でなけ
ればならない。When manufacturing a laminated film using extrusion lamination, in which a resin layer is provided on a metal-deposited film made of a metal such as aluminum, it is of course important to select a resin with excellent extrudability. Is it?
At the same time, the resin must have good adhesion to the metal-deposited surface.
ところで金属蒸着フィルムに樹脂を押出ラミネートする
と、ラミイ・−ト加工時に金属蒸着フィルムか受ける熱
履歴や収縮などにより、加工直後に、あいは加工後経時
的に、金属蒸着フィルムを構成する金属蒸着層と被蒸着
フィルムとの接着強度が低下するという現象か生ずる傾
向が認められている。このような現象の発生度合は被蒸
着フィルムの種類によっても異なり、たとえばＰ Ｅ
’ｆ”やナイロン等のように耐熱性の良好なフィルムで
はこのような現象の発生度合は顕著ではないが、被蒸着
フィルムがＰＰフィルムの場合にはかなりの頻度でこの
ような現象が見られる。したがって、金属蒸着ＰＰフィ
ルムにおいては、その金属蒸着面側に樹脂を押出ラミネ
ートする場合、層間接着力の良好な積層フィルムを得る
には、単に金属と接着性の良い樹脂を押出ラミネートに
用いればよいというものではなく、熱履歴等によるＰＰ
フィルムと蒸着金属間の接着強度の低下を勘案する必要
があり、好適な樹脂の選択は決して容易ではなかった。By the way, when resin is extruded and laminated onto a metallized film, the metallized layer constituting the metallized film may deteriorate immediately after processing or over time due to the heat history and shrinkage that the metallized film receives during lamination processing. It has been observed that there is a tendency for the adhesive strength between the film and the film to be deposited to decrease. The degree of occurrence of this phenomenon varies depending on the type of film to be deposited; for example, P.E.
The degree of occurrence of this phenomenon is not remarkable in films with good heat resistance such as 'f' or nylon, but this phenomenon is observed quite often when the film to be deposited is PP film. Therefore, when extrusion laminating a resin on the metal-deposited side of a metal-deposited PP film, in order to obtain a laminated film with good interlayer adhesion, simply use a resin with good adhesion to the metal for extrusion lamination. PP is not good, but depends on heat history, etc.
Selection of a suitable resin has not been easy, as it is necessary to take into consideration the reduction in adhesive strength between the film and the deposited metal.
さらに具体例をあげれば、アルミ蒸着ＰＰフィルム／′
樹脂（Ａ）／アンカーコート剤塗布ＰＰフィルムから構
成される積層フィルムを、樹脂（Ａ）を用いてサンドイ
ッチ押出ラミネート法により製造する場合、樹脂（Ａ）
として、金属に対する接着性か良いとされるエチレン・
アクリル酸共重合体、エチレン・メタクリル酸共重合体
のようなエチレン・エチレン性不飽和カルボン酸共重合
体を選択すると、加工して積層フィルムに成形した直後
においてはアルミ蒸着ＰＰフィルムと樹脂（Ａ）間は適
度な剥離強度を有している。しかしながら加工後３〜１
０日程度経過すると、僅かな剥離力によって、蒸着アル
ミ層と被蒸着ＰＰフィルムとが剥寵してしまうといった
現象が認められるので、このような積層フィルムは用途
によっては必ずしも適度な剥離強度を有しているとはい
えない。To give a more specific example, aluminum vapor-deposited PP film/'
When manufacturing a laminated film composed of resin (A)/anchor coating agent-coated PP film using resin (A) by a sandwich extrusion lamination method, resin (A)
Ethylene, which is said to have good adhesion to metals,
When an ethylene/ethylenic unsaturated carboxylic acid copolymer such as an acrylic acid copolymer or an ethylene/methacrylic acid copolymer is selected, the aluminum-deposited PP film and the resin (A ) has appropriate peel strength. However, after processing 3-1
After about 0 days, there is a phenomenon in which the deposited aluminum layer and the deposited PP film come apart due to a slight peeling force, so such laminated films may not necessarily have adequate peel strength depending on the application. I cannot say that I am doing so.
本発明者らは、先に上記樹脂（Ａ ）として特定の樹脂
組成物を使用した場合に、剥離強度などの特性に優れた
積層フィルムが得られることを見出し、特願昭６２−３
１７３９４号として出願した。その後、さらに検討を進
めた結果、このような樹脂組成物を用いずとも、特定性
状の共重合体を使用すれば、先に本発明者らが提案した
積層フィルムに勝るとも劣らない性能良好な積層フィル
ム（多層フィルム）が得られることを見出し、本発明を
完成するに至った。The present inventors first discovered that a laminated film with excellent properties such as peel strength could be obtained when a specific resin composition was used as the resin (A), and patent application No. 62-3
The application was filed as No. 17394. Subsequently, as a result of further investigation, it was found that even without using such a resin composition, if a copolymer with specific properties was used, the performance would be as good as that of the laminated film proposed by the present inventors. It was discovered that a laminated film (multilayer film) can be obtained, and the present invention was completed.
発明の目的
本発明は、金属蒸着ＰＰフィルムに特定性状の重合体を
積層したフィルムであって、積層加工後に金属層と被蒸
着ＰＰフィルムとの接着強度の低下が少なく、金属蒸着
面に対しても良好な接着力を有する包装用多層フィルム
を提供することを目的としている。Purpose of the Invention The present invention is a film in which a polymer with specific properties is laminated on a metallized PP film, which exhibits less decrease in adhesive strength between the metal layer and the PP film after lamination processing, and which has a high adhesive strength against the metallized surface. Another object of the present invention is to provide a multilayer packaging film having good adhesive strength.
また、本発明はガスバリヤ−性、遮光性、層間接着力が
１憂れな金属光沢を有する新規な包装用多層フィルムを
提供することを目的としている。Another object of the present invention is to provide a novel multilayer film for packaging, which has gas barrier properties, light blocking properties, and interlayer adhesion, and has a metallic luster.
さらに、本発明はこのような多層フィルムを、簡易で経
済的に有利な押出ラミネート法によって製造する方法を
提供することを目的としている。A further object of the present invention is to provide a method for producing such a multilayer film by a simple and economically advantageous extrusion lamination method.
発明の概要
本発明の包装用多層フィルムは、金属７Ａ、着ポリプロ
ピレンフィルムの金属及着面側に、エチレン性不飽和カ
ルボン酸含有量が２〜８重量％、エチレン性不飽和カル
ボン酸エステル含有量が５〜２５重呈％、メルトフロー
レートか１５〜５０ｄｇ／’分のエチレン・エチレン性
不飽和カルボン酸・エチレン性不飽和カルボン酸エステ
ル共重合体層か形成されていることを特徴としている。Summary of the Invention The multilayer film for packaging of the present invention has a metal 7A-adhesive polypropylene film with an ethylenically unsaturated carboxylic acid content of 2 to 8% by weight and an ethylenically unsaturated carboxylic acid ester content on the metal and adhesion side of the polypropylene film. It is characterized by the formation of an ethylene/ethylenic unsaturated carboxylic acid/ethylenic unsaturated carboxylic acid ester copolymer layer having a weight ratio of 5 to 25% and a melt flow rate of 15 to 50 dg/min.
本発明に１系る包装用多層フィルムの製法は、上記立居
蒸着ポリプロピレンフィルムの金属及着面側に、１−記
共重合体を押出ラミネートすることを特徴としている。A method for producing a multilayer packaging film according to the present invention is characterized by extrusion laminating the copolymer described in 1- above on the metal and adhesion side of the standing vapor deposited polypropylene film.
発明の詳細な説明
以下本発明の包装用多層フィルムおよびその製法につい
て具１４り的に説明する。DETAILED DESCRIPTION OF THE INVENTION The multilayer packaging film of the present invention and its manufacturing method will be specifically described below.
本発明の包装用多層フィルムを構成する金属蒸着ポリプ
ロピレンフィルムとは二軸延伸ポリプロピレンフィルム
（○ｐｐ＋、＝延伸ポリグロビレンフィルム（ＣＰＰ）
の片面または両面にアルミニウム、別、銀、金等の金属
を公知の蒸着方法で蒸着膜の厚さか１００〜１００ＯＡ
程度に蒸着したものをいう。The metallized polypropylene film constituting the multilayer packaging film of the present invention is a biaxially oriented polypropylene film (○pp+, = oriented polyglopylene film (CPP)).
A metal such as aluminum, silver, gold, etc. is deposited on one or both sides of the film using a known vapor deposition method to a thickness of 100 to 100 OA.
Refers to materials that have been vapor-deposited to a certain extent.
本発明の包装用多層フィルムにおいては、金属灰石ポリ
プロピレンフィルムの金属蒸着面（両面に形成されてい
る場合には少なくともその一面）に接して、下記特定性
状のエチレン・エチレン性不飽和カルボン酸・エチレン
性不飽和カルボン酸エステル共重合体層が形成されてい
る。かかる構成をとるかぎり、両者の接触面と異なる側
の一面または両面にさらに他の層か設けられていてもよ
い
上記エチレン・エチレン性不飽和カルボン酸・エチレン
性不飽和カルボン酸エステル共重合体としては、たとえ
ばエチレン・アクリル酸またはメタクリル酸・アクリル
酸エステルまたはメタクリル酸エステル共重合体等を挙
げることができる。In the multilayer film for packaging of the present invention, in contact with the metal vapor-deposited surface (at least one surface if it is formed on both sides) of the metallurgical limestone polypropylene film, ethylene, ethylenically unsaturated carboxylic acid, etc. having the following specific properties, An ethylenically unsaturated carboxylic acid ester copolymer layer is formed. As long as such a configuration is adopted, as the above-mentioned ethylene/ethylenic unsaturated carboxylic acid/ethylenic unsaturated carboxylic acid ester copolymer, another layer may be further provided on one or both sides of the side different from the contact surface between the two. For example, ethylene/acrylic acid, methacrylic acid/acrylic ester, or methacrylic ester copolymer can be mentioned.
ここにアクリル酸エステルまたはメタクリル酸エステル
のエステル形成基としては、メチル基、エチル基、ｎ−
プロピル基、１−プロピル基、ｎ−ブチル基、１−ブチ
ル基、１−ブチル基、２−エチルヘキシル基等を挙げる
ことができる。これらのエステル形成基のうちで＃Ｕ炭
素数１〜８のアルキル基が好ましく、さらに好ましくは
炭素数３〜８のアルキル基が好ましい、
上記共重合体中におけるエチレン性不飽和カルボン酸倉
有址は２〜８重量％、好ましくは３〜７重１ ％であり
、エチレン性不飽和カルボン酸エステル含有量は５〜２
５重量％、好ましくは１２〜２０重量％でなければなら
ない。すなわちエチレン性不飽和カルボン酸含有量か前
記範囲より少ない共重合体は層着金属との接着性が劣り
、またその量か前記範囲より多い共重合体は、蒸着金属
と被蒸着ポリプロピレンとの間の接着に悪影響を及ぼす
ようになる。またエチレン性不飽和カルボン酸エステル
含有量か、前記範囲より少ない共重合１本を用いると、
蒸着金属と被蒸着ポリプロピレン間の接着に悪影響を及
ぼずようになり、一方、前記範囲より多い共重合体は、
一般にその製造過程での完全な脱臭が難しく、積層加工
時においてもその臭いを除去し難くなるので好ましくな
い。Here, examples of the ester-forming group of acrylic ester or methacrylic ester include methyl group, ethyl group, n-
Examples include propyl group, 1-propyl group, n-butyl group, 1-butyl group, 1-butyl group, and 2-ethylhexyl group. Among these ester-forming groups, #U is preferably an alkyl group having 1 to 8 carbon atoms, more preferably an alkyl group having 3 to 8 carbon atoms. is 2 to 8% by weight, preferably 3 to 7% by weight, and the ethylenically unsaturated carboxylic acid ester content is 5 to 2% by weight.
It should be 5% by weight, preferably 12-20% by weight. In other words, a copolymer with an ethylenically unsaturated carboxylic acid content less than the above range will have poor adhesion to the layered metal, and a copolymer with an ethylenically unsaturated carboxylic acid content greater than the above range will have poor adhesion between the deposited metal and the polypropylene to be deposited. Adhesion will be adversely affected. In addition, if one copolymer with an ethylenically unsaturated carboxylic acid ester content or less than the above range is used,
The adhesion between the deposited metal and the deposited polypropylene is not adversely affected, while the copolymer in an amount above the above range is
Generally, it is difficult to completely deodorize during the manufacturing process, and it is also difficult to remove the odor during lamination processing, which is not preferable.
共重合体中におけるエチレン含有量は、６７〜９３重量
％、好ましくは７３〜８５重量％の範囲である。The ethylene content in the copolymer ranges from 67 to 93% by weight, preferably from 73 to 85% by weight.
この共重合外のメルトフローレート（１９０℃、２１６
０ｇ荷重）はまた、１５〜５０ｄ＋ｒ／分、好ましくは
２５〜４０ｄｇ／分の範囲でなければならない。メルト
フローレートが前記範囲より小さい共重合体は溶融樹脂
膜の延展性が不足し、また前記範囲より大きいものは溶
融樹脂膜のネックイン（溶融樹脂膜両端のロス）が大き
くなるので、いずれもラミネー）・加工を行なうのに適
していない。Melt flow rate outside this copolymerization (190°C, 216
0g load) should also be in the range 15-50 d+r/min, preferably 25-40 dg/min. A copolymer with a melt flow rate smaller than the above range will result in insufficient spreadability of the molten resin film, and a copolymer with a melt flow rate larger than the above range will result in large neck-in of the molten resin film (loss at both ends of the molten resin film). Not suitable for lamination) and processing.
共重合体としては、また成形加工性の点から、膨比が７
０％、好ましくは・１０〜６５％、とくに好ましくは４
５〜６０％の範囲の共重合体を選択するのがよい。すな
わち膨比が上記範囲を超えるような共重合体は、成形時
におけるフィルム両端部での成膜安定性の点において、
高速で押出；１−ティングすることが難しいために好ま
しくない。As a copolymer, from the viewpoint of moldability, the swelling ratio is 7.
0%, preferably 10-65%, particularly preferably 4
A copolymer in the range of 5 to 60% is preferably selected. In other words, a copolymer with a swelling ratio exceeding the above range has poor film formation stability at both ends of the film during molding.
Extrusion at high speed; undesirable because it is difficult to extrude.
なお、膨比は、メルトフローの測定機器（ＪＩＳ Ｋ６
７６０に準拠、荷重２１６０ｇ、温度１２５℃の条件で
測定）において、得られるストランドの先端から５鴎の
部分の直径ｄ（測定方向を９０°の角度で変え、２ケ所
で測定した平均値）を測定し、次式により求める。The swelling ratio is measured using a melt flow measuring device (JIS K6
760, measured at a load of 2160g and a temperature of 125°C), the diameter d of the 5-point part from the tip of the resulting strand (the average value measured at two locations with the measurement direction changed at a 90° angle). Measure and calculate using the following formula.
本発明に係る包装用多層フィルムは、前記共重合体を、
金属蒸着ポリプロピレンフィルムの蒸着金属面上に押出
ラミネートすることによって製造することができる。こ
こに押出ラミネートとしては、シングルラミネー１〜の
外に、共押出ラミネートによる多層押出、タンデムラミ
ネートによる２度ラミネートなどがある。この際、共重
合体が金属蒸着ポリプロピレンフィルムと接触する面と
反対面に他の熱可塑性樹脂フィルム、たとえば二軸延伸
ポリプロピレンフィルム、無延伸ポリプロピレンフィル
ム、ポリエステル、ポリアミド、低密度ポリエチレン、
金属蒸着各種プラスチックフィルムなどのプラスチック
フィルム等を配することにより、サンドイッチ押出ラミ
ネートをすることが可能である。この際、他の熱可塑性
樹脂フィルムのラミネート面には、必要に応じてアンカ
ーコート剤を塗布したり、あるいはコロナ処理などを施
しておいてもよい。金属蒸着ポリプロピレンフィルムあ
るいは場合によって形成させる池の熱可塑性フィルムの
厚みは、それぞれ１０〜１００μｍ程度が好ましく、ま
た押出ラミネートする前記共重合体層の厚みは５〜２０
０μｍ、とくに１０〜５０μｍ程度とするのが好ましい
。The multilayer film for packaging according to the present invention comprises the copolymer,
It can be manufactured by extrusion lamination onto the metallized metal side of a metallized polypropylene film. In addition to single laminations 1 to 1, extrusion laminations include multilayer extrusion by coextrusion lamination, double lamination by tandem lamination, and the like. At this time, other thermoplastic resin films such as biaxially oriented polypropylene film, unoriented polypropylene film, polyester, polyamide, low density polyethylene,
Sandwich extrusion lamination is possible by disposing a plastic film such as various metal-deposited plastic films. At this time, the laminated surface of the other thermoplastic resin film may be coated with an anchor coating agent or subjected to corona treatment, if necessary. The thickness of the metal-deposited polypropylene film or the optionally formed thermoplastic film is preferably about 10 to 100 μm, and the thickness of the copolymer layer to be extrusion laminated is about 5 to 20 μm.
It is preferably about 0 μm, particularly about 10 to 50 μm.
押出ラミネートの温度は、１２０〜３００℃、とくに１
９０〜２３０℃程度が好ましい。The temperature of extrusion lamination is 120 to 300°C, especially 1
The temperature is preferably about 90 to 230°C.
なお、上記のような方法で製造された多層フィルムにヒ
ートシールを施す際に、シングルラミネートによる２層
フィルムの場合は、コート樹脂面、ＣＰＰフィルム面の
いずれをヒートシール層として用いてもよく、また共押
出し、タンデムラミネート、サンドイヅチラミネート等
による３層フィルムの場合にはＣＰＰフィルム面をヒー
トシール層として用いるのか一般的であるが、勿論、共
重合体の金属蒸着ポリプロピレンフィルムと接触する面
と反対面にヒートシール可能な素材をヒートシール層と
して用いることにより、こちらの面をヒートシール層と
して利用することらできる。In addition, when applying heat sealing to the multilayer film manufactured by the above method, in the case of a two-layer film by single lamination, either the coated resin surface or the CPP film surface may be used as the heat seal layer. In addition, in the case of three-layer films made by coextrusion, tandem lamination, sandwich lamination, etc., the surface of the CPP film is generally used as a heat seal layer, but of course, the surface of the copolymer in contact with the metallized polypropylene film is By using a heat-sealable material on the opposite side as the heat-sealing layer, this side can be used as the heat-sealing layer.
魚曹ヒと丸里
本発明によれば、簡易な押出ラミネート加工により、層
間接着性が優れ、しかも層間接着強度の経時低下の少な
い包装用多層フィルムを提供することができる。かかる
Ｓ Ｎフィルムは、防湿性、ガスバリヤ−性が要求され
るスナック食品等の包装に好適である。According to the present invention, it is possible to provide a multilayer packaging film that has excellent interlayer adhesion and less decreases in interlayer adhesive strength over time through simple extrusion lamination. Such an SN film is suitable for packaging snack foods and the like that require moisture-proofing and gas-barrier properties.
［実施例］
以下本発明を実施例により説明するが、本発明はこれら
実施例に限定されるものではない。[Examples] The present invention will be explained below using Examples, but the present invention is not limited to these Examples.
割腹■ユ
エチレン・メタクリル酸・アクリル酸イソブチル共重合
体（メタクリル酸含有量６重量％、アクリル酸イソブチ
ル含有量１５重量％、メルトフローレート３０ｄｇ／分
、膨比４８％）を口径６５市φの押出機を使用し′ｒダ
イスより樹脂温度２００°Ｃで押出して溶融薄膜とした
。次に公知の押出ラミホー＋−装置を用い、厚さ２５μ
ｍの二軸延伸ポリプロピレンフィルム（ＯＰＰ）のアン
カーコート塗布面（市販イミン系アンカーコート剤）と
厚さ２５μｍのアルミ蒸＠無延伸ポリプロピレンフィル
ム（ＣＰＰ）のアルミ蒸着面間に前述の溶融薄膜を押出
コーティングすることにより、三ＮＪ構成のアルミ蒸着
積層フィルム（包装用多層フィルム ０ＰＰ２５μｍ、
／ （ＡＣ剤）／コーティング樹脂１５μｍ／アルミ蒸
着ＣＰＰ２５μｍ）に加工しな。なお、ラミネート速度
は８０ｍ／分、押出コーティング厚みは１５μｍとした
（その他諸加工条件等については以下に記載）。Separately extruding a copolymer of ethylene, methacrylic acid, and isobutyl acrylate (methacrylic acid content: 6% by weight, isobutyl acrylate content: 15% by weight, melt flow rate: 30 dg/min, swelling ratio: 48%) into a diameter of 65 mm. The resin was extruded into a molten thin film using a machine at a resin temperature of 200°C through a 'r die. Next, using a known extrusion lamiho +- device, a thickness of 25μ was obtained.
The above-mentioned molten thin film was extruded between the anchor coat coated surface (commercially available imine-based anchor coating agent) of a biaxially oriented polypropylene film (OPP) with a thickness of 25 μm and the aluminum evaporated surface of a 25 μm thick aluminum evaporated @ unstretched polypropylene film (CPP). By coating, aluminum vapor-deposited laminated film with three NJ configuration (packaging multilayer film 0PP25μm,
/ (AC agent) / Coating resin 15 μm / Aluminum vapor deposited CPP 25 μm). The lamination speed was 80 m/min, and the extrusion coating thickness was 15 μm (other processing conditions are described below).
上述のようにして得られた三層構成のアルミ蒸着積層フ
ィルム（包装用多層フィルム）についてコーティング樹
脂−アルミ蒸着ＣＰＰ間で剥離させ、その層間接着力を
加工Ｉ Ｅｌ後および３０Ｅ１後において測定した。そ
の際、両剥離界面の観察を行ない、蒸着アルミのＣＰＰ
フィルムからの剥離の有無を確認した。なお、前述の樹
脂組成物についての押出ラミネート加工性（ドローダウ
ン性、ネックイン）の測定についても実施した。The three-layered aluminum vapor-deposited laminated film (packaging multilayer film) obtained as described above was peeled between the coating resin and the aluminum-deposited CPP, and the interlayer adhesion strength was measured after processing I El and 30E1. At that time, the interface between both peels was observed, and the CPP of the vapor-deposited aluminum was
The presence or absence of peeling from the film was confirmed. In addition, the extrusion lamination processability (drawdown property, neck-in) of the above-mentioned resin composition was also measured.
結果を表１に示す。The results are shown in Table 1.
−１−述の押出ラミネート加工条件、各測定条件等につ
いては以下の通りである。The extrusion lamination processing conditions, each measurement condition, etc. described in -1- are as follows.
・押出ラミネート加工条件
加 工機械：モダンマシナリー製６’Ｆｚｗｍφラミネ
ーター
′ｒダイス開ロ：０．６徂Ｘ ５００市エアーギヤツプ
＝１１０１ＴＩＩｎ
スクリユー：スリーステージロンクメタリングタイブ（
１，／Ｄ二２８）
押出樹脂ヱ：５６０ｇ／分
加−Ｌ速度：８０ｍ／’分
加工温度（ダイス下実温）：２００℃
コーティング厚み＝１５μｍ
・接着力測定条件
剥離サンプルｆｆｌ ： ｌ ５關
剥 離 速 度：３００關／分
剥 離 角 度：９０° （Ｔ型剥離）・ラミネート加
工性測定方法
ネックインコ前記加工条件で加工した場合のコート樹脂
＋ｉとＴダイス開口ｒｌ
（５００市）との差を測定。６
０市以下であれば問題なし。・Extrusion lamination processing conditions Processing machine: Modern Machinery 6'Fzwmφ laminator 'r Die opening: 0.6 degrees
1, /D228) Extruded resin: 560g/min Addition L speed: 80m/'min Processing temperature (actual temperature under the die): 200℃ Coating thickness = 15μm ・Adhesion force measurement conditions Peeled sample ffl: L 5 Peeling speed: 300 degrees/min Peeling angle: 90° (T-shaped peeling) Lamination workability measurement method Neck Parakeet Coat resin +i and T die opening RL (500 cities) when processed under the above processing conditions Measure the difference between. There is no problem if the city is 60 or less.
ドローダウン性：前記加工条件での樹脂押出量（５６０
ｇ／分）一定のまま、
加工速度を８０ｍ／分で次第に
上昇させていき、溶融膜切れが
発生し始める時の加工速度を測
定、１４０ｍ、／分以上であれは
良い。Drawdown property: resin extrusion amount under the above processing conditions (560
(g/min) While keeping the processing speed constant, gradually increase the processing speed to 80 m/min, and measure the processing speed at which melt film breakage begins to occur.It is good if the processing speed is 140 m/min or higher.
実施例２
実施例１のエチレン・メタクリル酸・アクリル酸イソブ
チル共重合体の代わりに、エチレン・メタクリル酸・ア
クリル酸イソブチル共重合体（メタクリル酸含有量４重
量％、アクリル酸イソブチル含有量１５重量％、メルト
フローレート２７ｄｇ、／分１．膨比５５％）を用いた
以外は、実施例１と同様め押出コーティング加工を行な
った。Example 2 Instead of the ethylene/methacrylic acid/isobutyl acrylate copolymer of Example 1, ethylene/methacrylic acid/isobutyl acrylate copolymer (methacrylic acid content: 4% by weight, isobutyl acrylate content: 15% by weight) The extrusion coating process was carried out in the same manner as in Example 1, except that a melt flow rate of 27 dg/min and a swelling ratio of 55% were used.
結果を表１に示す。The results are shown in Table 1.
実施例３
実施例】のエチレン・メタクリル酸・アクリル酸イソブ
チル共重合体の代わりに、エチレン・メタクリル酸・ア
クリル酸イソブチル共重合体（メタクリル酸含有量８重
量％、アクリル酸イソブチル含有址１５重量％、メルト
フローレート２５ｄｆ／’分、膨比５８％）を用いた以
外は、実施例１と同様の押出コーティング加工を行なっ
た。Example 3 Instead of the ethylene/methacrylic acid/isobutyl acrylate copolymer in Example, ethylene/methacrylic acid/isobutyl acrylate copolymer (methacrylic acid content: 8% by weight, isobutyl acrylate content: 15% by weight) The extrusion coating process was carried out in the same manner as in Example 1, except that a melt flow rate of 25 df/min and a swelling ratio of 58% were used.
結果を表１に示す。The results are shown in Table 1.
実施例４
実施例１のエチレン・メタクリル酸・アクリル酸イソブ
チル共重合体の代わりに、エチレン・メタクリル酸・ア
クリル酸イソブチル共重合体（メタクリル酸含有量８重
量％、アクリル酸イソブチル含有量２０重量％、メルト
フローレート２５４ ｇ ／’分、１形化７０％）を用
いた以外は、実施例１と同様の押出：２−ティング加工
を行なった。Example 4 Instead of the ethylene/methacrylic acid/isobutyl acrylate copolymer of Example 1, ethylene/methacrylic acid/isobutyl acrylate copolymer (methacrylic acid content: 8% by weight, isobutyl acrylate content: 20% by weight) The extrusion/2-ting process was carried out in the same manner as in Example 1, except that a melt flow rate of 254 g/min and a monomorphism of 70% were used.
結果を表１に示す。The results are shown in Table 1.
匿旦■ユ
実施例１のエチレン・メタクリル酸・アクリル酸イソブ
チル共重合体の代わりに、エチレン・メタクリル酸・ア
クリル酸イソブチル共重合体（メタクリル酸含有量１０
重量％、アクリル酸イソブチル含有量１０重量％、メル
トフローレート３５６ｇ／分１．膨比５４％）を用いた
以外は、実施例１と同様の押出コーティング加工を行な
った。Instead of the ethylene/methacrylic acid/isobutyl acrylate copolymer of Example 1, ethylene/methacrylic acid/isobutyl acrylate copolymer (methacrylic acid content: 10
Weight %, isobutyl acrylate content 10 weight %, melt flow rate 356 g/min 1. The extrusion coating process was carried out in the same manner as in Example 1, except that a swelling ratio of 54% was used.
結果を表１に示す。The results are shown in Table 1.
監蚊■ユ
実施例１のエチレン・メタクリル酸・アクリル酸イソブ
チル共重合体の代わりに、エチレン・メタクリル酸共重
合体（メタクリル酸含有量１０重量％、メルトフローソ
ー１〜２フｄ
４８％）を用いた以外は、実施例１と同様の押出コーテ
ィング加工を行なった。In place of the ethylene/methacrylic acid/isobutyl acrylate copolymer of Example 1, ethylene/methacrylic acid copolymer (methacrylic acid content 10% by weight, melt flow saw 1-2 fluid 48%) was used. The extrusion coating process was carried out in the same manner as in Example 1, except that .
結果を表１に示す。The results are shown in Table 1.
Claims (4)
に、エチレン性不飽和カルボン酸含有量が２〜８重量％
、エチレン性不飽和カルボン酸エステル含有量が５〜２
５重量％、メルトフローレートが１５〜５０ｄｇ／分の
エチレン・エチレン性不飽和カルボン酸・エチレン性不
飽和カルボン酸エステル共重合体層が形成されているこ
とを特徴とする包装用多層フィルム。(1) Ethylenically unsaturated carboxylic acid content of 2 to 8% by weight on the metal-deposited side of the metal-deposited polypropylene film
, the ethylenically unsaturated carboxylic acid ester content is 5 to 2
A multilayer film for packaging, comprising an ethylene/ethylenically unsaturated carboxylic acid/ethylenically unsaturated carboxylic acid ester copolymer layer having a melt flow rate of 5% by weight and a melt flow rate of 15 to 50 dg/min.
ンフィルムが積層されていることを特徴とする請求項第
１項に記載の包装用多層フィルム。(2) The multilayer packaging film according to claim 1, further comprising a stretched polypropylene film laminated in contact with the copolymer layer.
に、エチレン・エチレン性不飽和カルボン酸・エチレン
性不飽和カルボン酸エステル共重合体を押出ラミネート
することを特徴とする包装用多層フィルムの製法。(3) A method for producing a multilayer film for packaging, which comprises extrusion laminating an ethylene/ethylenic unsaturated carboxylic acid/ethylenic unsaturated carboxylic acid ester copolymer on the metal vapor deposited side of a metal vapor deposited polypropylene film.
延伸ポリプロピレンフィルムとの間にエチレン・エチレ
ン性不飽和カルボン酸・エチレン性不飽和カルボン酸エ
ステル共重合体をサンドイッチ押出ラミネートすること
を特徴とする包装用多層フィルムの製法。(4) For packaging characterized by sandwich extrusion lamination of ethylene/ethylenic unsaturated carboxylic acid/ethylenic unsaturated carboxylic acid ester copolymer between the metal vapor deposited surface of the metal vapor deposited polypropylene film and the stretched polypropylene film. Manufacturing method of multilayer film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63192253A JP2567920B2 (en) | 1988-08-01 | 1988-08-01 | Multilayer film for packaging and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63192253A JP2567920B2 (en) | 1988-08-01 | 1988-08-01 | Multilayer film for packaging and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0241239A true JPH0241239A (en) | 1990-02-09 |
| JP2567920B2 JP2567920B2 (en) | 1996-12-25 |
Family
ID=16288215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63192253A Expired - Lifetime JP2567920B2 (en) | 1988-08-01 | 1988-08-01 | Multilayer film for packaging and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2567920B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008058734A (en) * | 2006-08-31 | 2008-03-13 | Mitsumi Electric Co Ltd | Camera module |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5314275A (en) * | 1976-07-23 | 1978-02-08 | Nissan Motor Co Ltd | Cylinder apparatus |
| JPS61175440U (en) * | 1985-04-22 | 1986-11-01 |
-
1988
- 1988-08-01 JP JP63192253A patent/JP2567920B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5314275A (en) * | 1976-07-23 | 1978-02-08 | Nissan Motor Co Ltd | Cylinder apparatus |
| JPS61175440U (en) * | 1985-04-22 | 1986-11-01 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008058734A (en) * | 2006-08-31 | 2008-03-13 | Mitsumi Electric Co Ltd | Camera module |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2567920B2 (en) | 1996-12-25 |
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