JP2004209933A - Manufacturing method for multi-layer film - Google Patents

Manufacturing method for multi-layer film Download PDF

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Publication number
JP2004209933A
JP2004209933A JP2003002636A JP2003002636A JP2004209933A JP 2004209933 A JP2004209933 A JP 2004209933A JP 2003002636 A JP2003002636 A JP 2003002636A JP 2003002636 A JP2003002636 A JP 2003002636A JP 2004209933 A JP2004209933 A JP 2004209933A
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film layer
layer
main
adhesive
multilayer film
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JP4076447B2 (en
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Takashi Yamada
孝 山田
Hirotoshi Tawara
宏俊 田原
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Kao Corp
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Kao Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

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  • Closures For Containers (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Packages (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an unexpected interlaminar separation of a separating film layer from a main film layer from occurring in a multi-layer film. <P>SOLUTION: This manufacturing method for the multi-layer film includes a process wherein a bonded body, for which the separating film layer 112 to be separated is bonded on the main film layer 111 made of polyethylene through a molten resin layer 113 made of polyethylene, is manufactured, and then, the bonded body is heated. The thickness of the main film layer 111 constituting the bonded body is set to be 25 to 100 μm, and the heating temperature for the bonded body is set to be 50 to 90°C. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は多層フィルムの製造方法に関する。
【０００２】
【従来の技術】
特許文献１に記載の如く、ガスバリア層を含む等の剥離フィルム層を主フィルム層に剥離可能な状態で接着してなる多層フィルムを構成するため、主フィルム層と剥離フィルム層とを溶融樹脂層を介して接着するものがある。
【０００３】
【特許文献１】
特開２０００−１０９１２８（段落番号［０００８］、［００１１］、［００１６］）
【０００４】
【発明が解決しようとする課題】
多層フィルムの製造過程では、溶融樹脂層が主フィルム層と剥離フィルム層に挟まれて押圧されながら急速冷却されるが、この多層フィルムが剥離フィルム層を外面側にした状態で容器に封着された使用段階では、剥離フィルム層が主フィルム層から不測の層間剥離を生じたり、容器の内容物が主フィルム層に含浸した後に剥離フィルム層を透過できずに溶融樹脂層に残留し、これが剥離フィルム層の不測の層間剥離部分で液たまり状になって溶融樹脂層の接着力を更に低下することがある。
【０００５】
本発明者の推測では、多層フィルムの製造段階で主フィルム層と剥離フィルム層の間で溶融樹脂層が急速冷却され固まりかけながら高粘度状態で押しつぶされるときに、溶融樹脂層に残留応力が残るものと考えられる。このため、この多層フィルムが剥離フィルム層を外面側にした状態で容器に封着された使用段階では、容器の内容物が主フィルム層に含浸して溶融樹脂層が膨潤するときに、溶融樹脂層の残留応力が解放されて該溶融樹脂層が変形する結果、主フィルム層と剥離フィルム層との間の各所で溶融樹脂層の接着力がばらつくものとなり、剥離フィルム層が主フィルム層から不測の層間剥離を生ずるものと考えられる。そして、剥離フィルム層にガスバリア層を含む場合には、容器の内容物が主フィルム層に含浸した後に剥離フィルム層を透過できずに溶融樹脂層に残留し、これが剥離フィルム層の不測の層間剥離部分で液たまり状になって溶融樹脂層の接着力を更に低下するものと考えられる。
【０００６】
本発明の課題は、多層フィルムにおいて、主フィルム層からの剥離フィルム層の不測の層間剥離を防止することにある。
【０００７】
【課題を解決するための手段】
請求項１の発明は、ポリエチレンからなる主フィルム層に、ポリエチレンの溶融樹脂層を介して、剥離されることとなる剥離フィルム層を接着した接着体を製造後、該接着体を加温する工程を含む多層フィルムの製造方法であって、接着体を構成する主フィルム層の厚みを２５〜１００μｍ、接着体の加温温度を５０〜９０℃とするようにしたものである。
【０００８】
【発明の実施の形態】
多層フィルム製造装置１０は、図１に示す如く、冷却ロール１１と密着ロール２１と充填ノズル３１とを有する。冷却ロール１１は、例えば５℃の冷却水の供給管１１Ａが接続される。密着ロール２１は、押圧シリンダ２１Ａにより、冷却ロール１１に押圧される。
【０００９】
多層フィルム製造装置１０は、主フィルム層１１１と、主フィルム層１１１から剥離されることとなる剥離フィルム層１１２とを冷却ロール１１と密着ロール２１の圧接部にて重ね合わせるように送給するとともに、この重ね合わせ点の上方の充填ノズル３１から吐出される例えば３２０℃程度の高温溶融ポリエチレン（ＰＥ）等の溶融樹脂層１１３を主フィルム層１１１と剥離フィルム層１１２の間に挟む。そして、押圧シリンダ２１Ａの押圧力で押圧される密着ロール２１と冷却ロール１１の間で、主フィルム層１１１に溶融樹脂層１１３を介して剥離フィルム層１１２を密着させるとともに、それらの密着体１１４を冷却ロール１１の周囲に巻き回して溶融樹脂層１１３を冷却固化することによリ、主フィルム層１１１と剥離フィルム層１１２とを接着した接着体１１５を得る。
【００１０】
多層フィルム製造装置１０はエージング処理室４１を付帯的に備える。多層フィルム製造装置１０によって上述の如くに製造された接着体１１５を、平面状のシート状態又は巻取状のロール状態でエージング処理室４１に納め、加温することによりエージング処理された多層フィルム１１０を得る。エージング処理の効果及び最適エージング条件については後述する。
【００１１】
ここで、多層フィルム１１０は、以下の如くに構成される（図３）。主フィルム層１１１はガス透過層であるＰＥにて構成される。溶融樹脂層１１３はＰＥにて構成される。剥離フィルム層１１２は剥離層であるポリプロピレン（ＰＰ）、ガスバリア層であるアルミニウム（ＡＬ）、保護層であるポリエチレンテレフタレート（ＰＥＴ）の積層接着体（ウレタン系接着剤等による接着）等にて構成できる。
【００１２】
多層フィルム１１０は、図２に示す如く、香料容器１００の容器本体１０１にヒートシールされ、香料含有物を収容した容器本体１０１の開口を封着することに用いられる。容器本体１０１は、例えばガスバリア層兼形状成形層としてのＰＥＴを外層とし、多層フィルム１１０の主フィルム層１１１とのシール層としてのＰＥを内層とする積層接着体にて構成される。そして、容器本体１０１を基台５１にて支持し、多層フィルム１１０をヒートシールバー５２で加圧することによリ、多層フィルム１１０の主フィルム層１１１（ＰＥ）を容器本体１０１（ＰＥ）にヒートシールする。このとき、多層フィルム１１０の主フィルム層１１１は容器本体１０１にヒートシールされる部分とヒートシールされない部分の境界に、ヒートシールバー５２のエッジが付与する剪断力により剪断された剪断部１１１Ａを付与される。多層フィルム１１０において、主フィルム層１１１が容器本体１０１にヒートシールされなかった部分は取手１１０Ａになる。
【００１３】
従って、香料容器１００にあっては、使用前段階では、剥離フィルム層１１２が剥離されていない多層フィルム１１０によリ容器本体１０１の内部の香料含有物を封止し、使用時には、取手１１０Ａを用いて剥離フィルム層１１２を剥離することによリ香料含有物の蒸気を主フィルム層１１１に透過させて外部空間へと放散可能とする。
【００１４】
しかるに、多層フィルム１１０に付与する前述のエージング処理の効果及び最適エージング条件は以下の通りである。
【００１５】
（Ａ）エージング処理の効果
（Ａ−１）多層フィルム１１０の製造段階で、主フィルム層１１１に溶融樹脂層１１３を介して剥離フィルム層１１２を接着したとき、溶融樹脂層１１３が冷却されて固まりかけながら押しつぶされたときに残留応力を生じても、その後、主フィルム層１１１と溶融樹脂層１１３と剥離フィルム層１１２からなる接着体１１５を加温してエージングすることによリ、溶融樹脂層１１３の残留応力を緩和できる。このため、多層フィルム１１０が剥離フィルム層１１２を外面側にした状態で容器本体１０１に封着された使用段階で、容器本体１０１の内容物が主フィルム層１１１に含浸して溶融樹脂層１１３が膨潤しても、溶融樹脂層１１３が残留応力の解放によって変形を生ずることがなく、主フィルム層１１１と剥離フィルム層１１２の間の各所で溶融樹脂層１１３の接着力がばらつくことがなく、剥離フィルム層１１２が主フィルム層１１１から不測の層間剥離を生ずることがない。
【００１６】
（Ａ−２）剥離フィルム層１１２にガスバリア層（ＡＬ）を含む場合に、容器本体１０１の内容物が主フィルム層１１１に含浸した後に剥離フィルム層１１２を透過できずに溶融樹脂層１１３に残留するとき、剥離フィルム層１１２には上述（Ａ−１）によって不測の層間剥離を生じていないから、残留内容物が剥離フィルム層１１２の層間剥離部分で図４にＬで示す如くの液たまり状になることがないし、液たまりが溶融樹脂層１１３の接着力を低下することがない。
【００１７】
（Ｂ）エージング条件（表１、表２）
香料容器１００に適用した多層フィルム１１０（主フィルム層１１１を７０μｍ厚のＰＥとし、剥離フィルム層１１２を７０μｍ厚のＰＰ剥離層／７μｍ厚のＡＬガスバリア層／１２μｍ厚のＰＥＴ保護層からなる積層接着体とし、溶融樹脂層１１３を２５μｍ厚のＰＥとするもの）の剥離促進試験により、最適エージング条件を求めた。剥離促進試験は、まず下記（Ｂ−１）〜（Ｂ−３）の各種エージング条件でエージング処理された多層フィルム１１０を用意した上で、この多層フィルム１１０を用いた香料容器１００を作成し、この香料容器１００を６０℃の温度下に保存して剥離の有無を評価し、少なくとも３日間に渡って剥離フィルム層１１２が主フィルム層１１１から不測の層間剥離しないものを、香料容器１００の物流保管段階で長期的に剥離フィルム層１１２が主フィルム層１１１から不測の層間剥離しないものとみなし、合格（○印）とした（剥離フィルム層１１２が主フィルム層１１１から層間剥離したものを不良（×印）とした）。
【００１８】
（Ｂ−１）主フィルム層１１１の厚み
ロール状（中芯直径６０ｍｍ、ロール外径１００ｍｍ、ロール巾５００ｍｍ、約１００巻）の接着体１１５について、主フィルム層１１１（ＰＥ）の厚みを表１の如くに複数種用意した。用意した各接着体１１５に対し、エージング処理室４１による加温温度を６０℃、加温日数を表１の如くにするエージング処理を施し、ロール状の各多層フィルム１１０を得た。各多層フィルム１１０を用いた香料容器１００について行なった剥離評価によれば、表１に示す如く、主フィルム層１１１の厚みを２５μｍ以上、１００μｍ以下の範囲内に定めるとき、剥離評価は合格となることを認めた。
【００１９】
尚、主フィルム層１１１の厚みを２０μｍとするものは薄過ぎて製造不可能であった。
【００２０】
【表１】

Figure 2004209933
【００２１】
（Ｂ−２）加温温度
前述（Ｂ−１）と同様のロール状の接着体１１５について、主フィルム層１１１（ＰＥ）の厚みを７０μｍと定めた上で、エージング処理室４１による加温温度を表２の如くに複数種変更するものとした。用意した各接着体１１５に対し、エージング処理室４１による加温温度、加温日数を表２の如くにするエージング処理を施し、各多層フィルム１１０を得た。各多層フィルム１１０を用いた香料容器１００について行なった剥離評価によれば、表２に示す如く、エージング処理室４１で接着体１１５に加える加温温度を５０℃以上、９０℃以下の範囲内に定めるとき、剥離評価は合格となることを認めた。
【００２２】
尚、接着体１１５の加温温度が１００℃のとき、接着体１１５が波状に歪む熱変形を生じて採用できなかった。
【００２３】
【表２】
Figure 2004209933
【００２４】
（Ｂ−３）加温日数
表１、表２の如くのエージング処理を施した各多層フィルム１１０を用いた香料容器１００について行なった剥離評価によれば、表１、表２に示す如く、エージング処理室４１における接着体１１５の加温日数を３日以上に定めるとき、剥離評価は合格となることを認めた。加温日数の上限値は、エージング処理室４１への接着体１１５の投入保管コスト等の生産性の点から、２０日以内とすることが好適である。
【００２５】
上述（Ｂ−１）〜（Ｂ−３）によれば、多層フィルム１１０のエージング条件は、接着体１１５を構成する主フィルム層１１１（ＰＥ）の厚みを２５〜１００μｍ、接着体１１５の加温温度を５０〜９０℃、加温日数を３日以上とすることが最適であるものと認められる。
【００２６】
本実施形態によれば以下の作用がある。
▲１▼ＰＥの主フィルム層と剥離フィルム層１１２とＰＥの溶融樹脂層１１３の接着体１１５からなる多層フィルム１１０の剥離促進試験において、主フィルム層１１１の厚みを２５〜１００μｍ、接着体１１５の加温温度を５０〜９０℃、加温日数を３日以上とするエージング条件の実施により、エージング処理による接着体１１５の熱変形を回避できるし、エージング処理された多層フィルム１１０を６０℃の環境下においたときに主フィルム層１１１からの剥離フィルム層１１２の不測の層間剥離が３日以内に生ずることがないことが確認された。これにより、多層フィルム１１０の物流保管段階等における、剥離フィルム層１１２の不測の剥離を確実に防止できる。
【００２７】
▲２▼香料容器１００に封着した多層フィルム１１０において、主フィルム層１１１からの剥離フィルム層１１２の不測の層間剥離を防止するとともに、主フィルム層１１１と剥離フィルム層１１２の間の溶融樹脂層１１３の液たまりを防止できる。
【００２８】
尚、多層フィルム１１０にあっては、剥離フィルム層１１２にガスバリア層を含むことを必ずしも要さず、剥離フィルム層１１２を例えばＰＥＴだけで構成しても良い。また、剥離フィルム層１１２は、一般に用いられる樹脂フィルムを広く採用できる。
【００２９】
【発明の効果】
本発明によれば、多層フィルムにおいて、主フィルム層からの剥離フィルム層の不測の層間剥離を防止できる。
【図面の簡単な説明】
【図１】図１は多層フィルム製造装置を示す模式図である。
【図２】図２は香料容器を示す模式図である。
【図３】図３は香料容器のケースと多層フィルムのヒートシール過程を示す模式図である。
【図４】図４は香料容器の液たまり状態を示す模式図である。
【符号の説明】
１０ 多層フィルム製造装置
１１ 冷却ロール
２１ 密着ロール
３１ 充填ノズル
１００ 香料容器
１０１ 容器本体
１１０ 多層フィルム
１１１ 主フィルム層
１１２ 剥離フィルム層
１１３ 溶融樹脂層[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing a multilayer film.
[0002]
[Prior art]
As described in Patent Document 1, in order to constitute a multilayer film in which a release film layer including a gas barrier layer or the like is detachably bonded to the main film layer, the main film layer and the release film layer are formed of a molten resin layer. There is something that adheres through.
[0003]
[Patent Document 1]
JP-A-2000-109128 (paragraph numbers [0008], [0011], [0016])
[0004]
[Problems to be solved by the invention]
In the process of manufacturing the multilayer film, the molten resin layer is rapidly cooled while being pressed between the main film layer and the release film layer, but the multilayer film is sealed in a container with the release film layer on the outer surface side. In the use stage, the release film layer causes unexpected delamination from the main film layer, or remains in the molten resin layer without being able to pass through the release film layer after the contents of the container are impregnated into the main film layer, and this is peeled off. In some cases, the adhesive layer of the molten resin layer is further reduced due to a pool formed at an unexpected delamination portion of the film layer.
[0005]
According to the inventor's estimation, when the molten resin layer is rapidly cooled and crushed in a high-viscosity state while being solidified between the main film layer and the release film layer at the stage of manufacturing the multilayer film, residual stress remains in the molten resin layer. It is considered. For this reason, at the stage of use in which the multilayer film is sealed in a container with the release film layer facing outward, when the contents of the container impregnate the main film layer and the molten resin layer swells, the molten resin As a result of releasing the residual stress of the layer and deforming the molten resin layer, the adhesive strength of the molten resin layer varies at various points between the main film layer and the release film layer, and the release film layer is unexpectedly separated from the main film layer. It is considered that delamination of the film occurs. When the release film layer includes a gas barrier layer, the contents of the container are impregnated into the main film layer and cannot pass through the release film layer, but remain in the molten resin layer, and this is an unexpected delamination of the release film layer. It is considered that the liquid resin layer is formed in a portion at a portion to further reduce the adhesive strength of the molten resin layer.
[0006]
An object of the present invention is to prevent accidental delamination of a release film layer from a main film layer in a multilayer film.
[0007]
[Means for Solving the Problems]
The invention of claim 1 is a step of manufacturing an adhesive in which a release film layer to be peeled is bonded to a main film layer made of polyethylene via a molten resin layer of polyethylene, and then heating the adhesive. Wherein the thickness of the main film layer constituting the adhesive is 25 to 100 μm and the heating temperature of the adhesive is 50 to 90 ° C.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIG. 1, the multilayer film manufacturing apparatus 10 includes a cooling roll 11, a close contact roll 21, and a filling nozzle 31. The cooling roll 11 is connected to a cooling water supply pipe 11A at 5 ° C., for example. The close contact roll 21 is pressed against the cooling roll 11 by a pressing cylinder 21A.
[0009]
The multilayer film manufacturing apparatus 10 feeds the main film layer 111 and the release film layer 112 to be separated from the main film layer 111 so as to overlap each other at the press-contact portion of the cooling roll 11 and the close contact roll 21. Then, a molten resin layer 113 such as high-temperature molten polyethylene (PE) of about 320 ° C. discharged from the filling nozzle 31 above the overlapping point is sandwiched between the main film layer 111 and the release film layer 112. Then, between the close contact roll 21 pressed by the pressing force of the pressing cylinder 21A and the cooling roll 11, the release film layer 112 is brought into close contact with the main film layer 111 via the molten resin layer 113, and the adhered body 114 is removed. By winding around the cooling roll 11 to cool and solidify the molten resin layer 113, an adhesive body 115 in which the main film layer 111 and the release film layer 112 are bonded is obtained.
[0010]
The multilayer film manufacturing apparatus 10 is provided with an aging treatment chamber 41 incidentally. The adhesive body 115 manufactured as described above by the multilayer film manufacturing apparatus 10 is placed in the aging chamber 41 in a flat sheet state or a roll state in a rolled state, and the multilayer film 110 subjected to the aging processing by heating is applied. Get. The effects of the aging process and the optimal aging conditions will be described later.
[0011]
Here, the multilayer film 110 is configured as follows (FIG. 3). The main film layer 111 is made of PE which is a gas permeable layer. The molten resin layer 113 is made of PE. The release film layer 112 can be composed of a laminate of polypropylene (PP) as a release layer, aluminum (AL) as a gas barrier layer, and polyethylene terephthalate (PET) as a protective layer (adhesion with a urethane adhesive or the like). .
[0012]
As shown in FIG. 2, the multilayer film 110 is heat-sealed to the container body 101 of the fragrance container 100, and is used for sealing the opening of the container body 101 containing the fragrance-containing substance. The container main body 101 is formed of, for example, a laminated adhesive having PET as a gas barrier layer and a shape forming layer as an outer layer, and PE as an sealing layer with the main film layer 111 of the multilayer film 110 as an inner layer. Then, the container main body 101 is supported by the base 51, and the main film layer 111 (PE) of the multilayer film 110 is heated to the container main body 101 (PE) by pressing the multilayer film 110 with the heat seal bar 52. Seal. At this time, the main film layer 111 of the multilayer film 110 is provided with a shear portion 111A sheared by a shear force applied by the edge of the heat seal bar 52 at a boundary between a portion heat-sealed to the container body 101 and a portion not heat-sealed. Is done. In the multilayer film 110, a portion where the main film layer 111 is not heat-sealed to the container body 101 becomes a handle 110A.
[0013]
Therefore, in the perfume container 100, in the pre-use stage, the perfume-containing substance inside the container main body 101 is sealed with the multilayer film 110 from which the release film layer 112 has not been peeled, and the handle 110A is used at the time of use. By peeling the release film layer 112 by using this, the vapor of the fragrance-containing substance is allowed to permeate the main film layer 111 and be radiated to the external space.
[0014]
However, the effects of the aging treatment given to the multilayer film 110 and the optimum aging conditions are as follows.
[0015]
(A) Effect of Aging Treatment (A-1) When the release film layer 112 is bonded to the main film layer 111 via the molten resin layer 113 at the stage of manufacturing the multilayer film 110, the molten resin layer 113 is cooled and solidified. Even if a residual stress is generated when being crushed while being applied, the adhesive 115 composed of the main film layer 111, the molten resin layer 113, and the release film layer 112 is heated and aged to obtain a molten resin layer. The residual stress of 113 can be reduced. For this reason, at the stage of use in which the multilayer film 110 is sealed to the container main body 101 with the release film layer 112 on the outer surface side, the contents of the container main body 101 are impregnated into the main film layer 111 and the molten resin layer 113 is formed. Even when swollen, the molten resin layer 113 does not deform due to release of residual stress, and the adhesive strength of the molten resin layer 113 does not vary at various points between the main film layer 111 and the release film layer 112, and The film layer 112 does not cause unexpected delamination from the main film layer 111.
[0016]
(A-2) When the release film layer 112 includes the gas barrier layer (AL), after the contents of the container body 101 are impregnated into the main film layer 111, they cannot pass through the release film layer 112 and remain in the molten resin layer 113. Since no unexpected delamination has occurred in the release film layer 112 due to the above-mentioned (A-1), the residual contents are in a liquid pool form as shown by L in FIG. 4 at the delamination portion of the release film layer 112. And the pool does not reduce the adhesive strength of the molten resin layer 113.
[0017]
(B) Aging conditions (Tables 1 and 2)
The multilayer film 110 applied to the fragrance container 100 (the main film layer 111 is made of PE having a thickness of 70 μm, and the release film layer 112 is formed of a 70 μm-thick PP release layer / 7 μm-thick AL gas barrier layer / 12-μm-thick PET protective layer. Aging conditions were determined by a peeling acceleration test of the molten resin layer 113 having a thickness of 25 μm. In the peeling acceleration test, first, after preparing a multilayer film 110 that has been subjected to aging treatment under the following various aging conditions (B-1) to (B-3), a perfume container 100 using the multilayer film 110 is prepared. The perfume container 100 was stored at a temperature of 60 ° C., and the presence or absence of peeling was evaluated. If the release film layer 112 did not undergo unexpected delamination from the main film layer 111 for at least three days, the perfume container 100 In the storage stage, it was considered that the release film layer 112 did not unexpectedly delaminate from the main film layer 111 for a long period of time, and was judged as acceptable (marked with “○”). X))).
[0018]
(B-1) Thickness of Main Film Layer 111 For the adhesive roll 115 (medium core diameter: 60 mm, roll outer diameter: 100 mm, roll width: 500 mm, about 100 rolls), the thickness of the main film layer 111 (PE) is shown in Table 1. Multiple types were prepared as shown. Each of the prepared adhesive bodies 115 was subjected to an aging treatment in a aging treatment chamber 41 at a heating temperature of 60 ° C. and the number of days for heating as shown in Table 1, thereby obtaining each roll-shaped multilayer film 110. According to the peeling evaluation performed on the fragrance container 100 using each multilayer film 110, as shown in Table 1, when the thickness of the main film layer 111 is set in the range of 25 μm or more and 100 μm or less, the peeling evaluation passes. Admitted that.
[0019]
The main film layer 111 having a thickness of 20 μm was too thin to be manufactured.
[0020]
[Table 1]
Figure 2004209933
[0021]
(B-2) Heating Temperature With respect to the roll-shaped adhesive body 115 similar to the above (B-1), the thickness of the main film layer 111 (PE) is set to 70 μm, and the heating temperature by the aging treatment chamber 41 is set. As shown in Table 2. Each of the prepared adhesive bodies 115 was subjected to an aging treatment in which the heating temperature and the number of days for heating in the aging treatment chamber 41 were as shown in Table 2, and each multilayer film 110 was obtained. According to the peeling evaluation performed on the fragrance container 100 using each multilayer film 110, as shown in Table 2, the heating temperature applied to the adhesive body 115 in the aging treatment chamber 41 was within a range of 50 ° C. or more and 90 ° C. or less. At the time of determination, it was recognized that the peeling evaluation passed.
[0022]
In addition, when the heating temperature of the adhesive body 115 was 100 ° C., the adhesive body 115 was deformed in a wavy manner and could not be adopted.
[0023]
[Table 2]
Figure 2004209933
[0024]
(B-3) Heating days According to the peeling evaluation performed on the perfume container 100 using each of the multilayer films 110 subjected to the aging treatment as shown in Tables 1 and 2, the aging was as shown in Tables 1 and 2. When the number of days for heating the adhesive body 115 in the processing chamber 41 was set to 3 days or more, it was recognized that the peeling evaluation was acceptable. The upper limit of the number of heating days is preferably within 20 days from the viewpoint of productivity such as the cost of charging and storing the adhesive 115 into the aging processing chamber 41.
[0025]
According to (B-1) to (B-3) described above, the aging condition of the multilayer film 110 is such that the thickness of the main film layer 111 (PE) constituting the adhesive 115 is 25 to 100 μm, and the heating of the adhesive 115 is performed. It is recognized that the optimal temperature is 50 to 90 ° C. and the number of heating days is 3 days or more.
[0026]
According to the present embodiment, the following operations are provided.
{Circle around (1)} In the peeling acceleration test of the multilayer film 110 composed of the adhesive 115 of the main film layer of PE, the release film layer 112 and the molten resin layer 113 of PE, the thickness of the main film layer 111 is 25 to 100 μm, By implementing aging conditions of a heating temperature of 50 to 90 ° C. and a heating time of 3 days or more, thermal deformation of the bonded body 115 due to the aging process can be avoided, and the aging-processed multilayer film 110 can be stored in an environment of 60 ° C. It was confirmed that unexpected delamination of the release film layer 112 from the main film layer 111 did not occur within three days when placed below. Thereby, unexpected peeling of the release film layer 112 at the physical distribution storage stage or the like of the multilayer film 110 can be reliably prevented.
[0027]
{Circle over (2)} In the multilayer film 110 sealed in the fragrance container 100, the unexpected delamination of the release film layer 112 from the main film layer 111 is prevented, and the molten resin layer between the main film layer 111 and the release film layer 112 is prevented. 113 can be prevented from pooling.
[0028]
In the multilayer film 110, the release film layer 112 does not necessarily need to include a gas barrier layer, and the release film layer 112 may be made of, for example, only PET. Further, as the release film layer 112, a commonly used resin film can be widely used.
[0029]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, in a multilayer film, unexpected delamination of the peeling film layer from a main film layer can be prevented.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a multilayer film manufacturing apparatus.
FIG. 2 is a schematic view showing a fragrance container.
FIG. 3 is a schematic view showing a heat sealing process of a case of a fragrance container and a multilayer film.
FIG. 4 is a schematic diagram showing a liquid pool state of a fragrance container.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Multi-layer film manufacturing apparatus 11 Cooling roll 21 Adhesive roll 31 Filling nozzle 100 Perfume container 101 Container main body 110 Multi-layer film 111 Main film layer 112 Release film layer 113 Molten resin layer

Claims (3)

ポリエチレンからなる主フィルム層に、ポリエチレンの溶融樹脂層を介して、剥離されることとなる剥離フィルム層を接着した接着体を製造後、該接着体を加温する工程を含む多層フィルムの製造方法であって、
接着体を構成する主フィルム層の厚みを２５〜１００μｍ、接着体の加温温度を５０〜９０℃とする多層フィルムの製造方法。A method for producing a multilayer film including a step of heating an adhesive body after manufacturing an adhesive body in which a release film layer to be peeled is bonded to a main film layer made of polyethylene via a molten resin layer of polyethylene. And
A method for producing a multilayer film, wherein the thickness of the main film layer constituting the adhesive is 25 to 100 μm and the heating temperature of the adhesive is 50 to 90 ° C. 前記接着体の加温日数を３日以上とする請求項１に記載の多層フィルムの製造方法。The method for producing a multilayer film according to claim 1, wherein the heating period of the adhesive is 3 days or more. 容器本体に香料含有物を収容し、該容器本体の開口に請求項１又は２に記載の多層フィルムの製造方法により製造された多層フィルムを封着した香料容器。A perfume container in which a perfume-containing substance is accommodated in a container body, and a multilayer film produced by the method for producing a multilayer film according to claim 1 or 2 is sealed in an opening of the container body.
JP2003002636A 2003-01-08 2003-01-08 Method for producing multilayer film Expired - Fee Related JP4076447B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007090804A (en) * 2005-09-30 2007-04-12 Japan Vilene Co Ltd Method of manufacturing laminated integrated sheet and apparatus for manufacturing laminated integrated sheet
JP2010126204A (en) * 2008-11-28 2010-06-10 St Corp Container
JP2019501840A (en) * 2015-12-31 2019-01-24 ゾベル ホールディング エッセ．ピー．アー． Diffusers for active agents such as insecticides, perfumes, detergents or fungicides, and their manufacturing processes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007090804A (en) * 2005-09-30 2007-04-12 Japan Vilene Co Ltd Method of manufacturing laminated integrated sheet and apparatus for manufacturing laminated integrated sheet
JP2010126204A (en) * 2008-11-28 2010-06-10 St Corp Container
JP2019501840A (en) * 2015-12-31 2019-01-24 ゾベル ホールディング エッセ．ピー．アー． Diffusers for active agents such as insecticides, perfumes, detergents or fungicides, and their manufacturing processes

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