JP2013086851A - Laminated film adhesive structure and peeling method therefor - Google Patents

Laminated film adhesive structure and peeling method therefor Download PDF

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Publication number
JP2013086851A
JP2013086851A JP2011229717A JP2011229717A JP2013086851A JP 2013086851 A JP2013086851 A JP 2013086851A JP 2011229717 A JP2011229717 A JP 2011229717A JP 2011229717 A JP2011229717 A JP 2011229717A JP 2013086851 A JP2013086851 A JP 2013086851A
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film
laminated
lowermost
adhesive structure
laminated film
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Hirobumi Nakamura
博文 中村
Masatake Inoue
雅偉 井上
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Fujibo Holdins Inc
Sekisui Film Co Ltd
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Fujibo Holdins Inc
Sekisui Film Co Ltd
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Priority to JP2011229717A priority Critical patent/JP2013086851A/en
Priority to PCT/JP2012/076888 priority patent/WO2013058298A1/en
Publication of JP2013086851A publication Critical patent/JP2013086851A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/748—Releasability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/046—LDPE, i.e. low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2435/00—Closures, end caps, stoppers
    • B32B2435/02—Closures, end caps, stoppers for containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/80—Medical packaging

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive structure and a removal method therefor in which only the top layer of a laminated film can be reliably and easily peeled.SOLUTION: An adhesive structure is provided for a laminated film comprising at least two film layers glued onto a substrate and is characterized by the following: among the laminated film layers, at a minimum the bottommost film glued onto the substrate is formed by an elastic material; among the laminated film layers, at a minimum a topmost film laminated on top of the bottommost film is formed of a material that has almost no elasticity, or none at all; the bottommost film and the topmost film are laminated so that they can be detached from one another; and a concave part is formed in a part of the adhesion surface of the substrate, and a non-adhesive surface is formed by providing a space between the bottommost film and the substrate in the concave part.

Description

本発明は、上層フィルムのみ剥離可能な積層フィルムの接着構造と、かかる積層フィルムの接着構造を利用した剥離方法に関する。   The present invention relates to an adhesive structure of a laminated film in which only an upper layer film can be peeled, and a peeling method using the adhesive structure of the laminated film.

従来、収納部の開口をフィルムにより封印し、内容物を取り出すときにはかかるフィルムを開封して使用する容器が知られているが、内容物の性質や容器の用途に応じて、かかるフィルムを複数積層して封印する二重蓋構造の容器が知られている。   Conventionally, containers are known in which the opening of the storage unit is sealed with a film and the film is opened when the contents are taken out, but depending on the nature of the contents and the use of the container, a plurality of such films are laminated. A container having a double lid structure for sealing is known.

たとえば、特許文献１には二重蓋構造の食品用容器が開示されており、特許文献２には二重蓋構造の芳香剤容器が開示されている。これらの容器はいずれも、容器開口を積層フィルムにて封印し、使用時には、上層のフィルムのみ剥離して使用するというものである。   For example, Patent Document 1 discloses a food container with a double lid structure, and Patent Document 2 discloses a fragrance container with a double lid structure. In any of these containers, the container opening is sealed with a laminated film, and when used, only the upper film is peeled off and used.

ところで、こうした積層フィルムより上層の１枚のみは剥離することは容易ではないため、特許文献１や２の容器には、容器の縁部や下層のフィルムよりも外側に突出するように形成された把持部やつまみ片が上層フィルムに形成されており、これら把持部やつまみ片の部分をもって下層フィルムより引きはがすことにより、上層フィルムのみ剥離させることができる。   By the way, since it is not easy to peel only one upper layer from such a laminated film, the containers of Patent Documents 1 and 2 are formed so as to protrude outward from the edge of the container and the film of the lower layer. A gripping part and a knob piece are formed on the upper film, and only the upper layer film can be peeled off by peeling the grip part and the knob piece from the lower layer film.

また、特許文献３には、試薬用の容器であって、その開口部を弾性体からなるフィルムで封止したものが開示されている。かかる試薬容器は、内容物を外部に排出するときにも弾性体フィルムを剥離することはなく、フィルムを容器内に膨張させて内容物を排出させるが、保管時に酸素等の外部からの影響を防ぐため、弾性体フィルムの上からバリア機能を有するフィルムを積層させた二重蓋構造とすることが好ましい。   Patent Document 3 discloses a reagent container having an opening sealed with a film made of an elastic body. Such a reagent container does not peel off the elastic film even when the contents are discharged to the outside, and the contents are discharged by expanding the film into the container. In order to prevent this, a double lid structure in which films having a barrier function are laminated on the elastic film is preferable.

こうした試薬容器において、開口を封止するフィルムを積層させた場合、使用時に上層のフィルムを剥離しやすいように、特許文献１、２に見られるような剥がすきっかけとなる把持部やつまみ片を形成することが考えられる。しかしながら、かかる把持部等を形成できるのは、容器の端部に限られ、試薬容器の中で複数の収納部が１枚の基板に連続して設けられているタイプのもので、縦横に３列以上に並んで形成されるものは、その中央に配置する容器部分に把持部やつまみ片を設けることができないという問題を有している。 また、上層フィルムの上に、後付けで把持部等を形成することも可能ではあるものの、その工程が別途増えることになる。   In such a reagent container, when a film that seals the opening is laminated, a gripping part or a knob piece that becomes a trigger for peeling as seen in Patent Documents 1 and 2 is formed so that the upper film can be easily peeled off during use. It is possible to do. However, such a gripping part or the like can be formed only at the end of the container, and is a type in which a plurality of storage parts are continuously provided on one substrate in the reagent container. Those formed side by side in a row or more have a problem that a grip portion or a knob piece cannot be provided in a container portion arranged at the center thereof. In addition, although it is possible to form a gripping part or the like on the upper layer film by retrofitting, the number of processes will be increased separately.

特開平１１−７９２２８JP-A-11-79228 特開２００４−３０６９９５JP 2004-306995 A 再表２００９／０３５０６２Table 2009/035062

そこで本発明は、従来の積層フィルムの欠点を克服し、積層フィルムの最上層フィルムのみを確実かつ容易に剥離可能とする接着構造とその剥離方法の提供をその課題とするものである。   Therefore, the object of the present invention is to overcome the drawbacks of the conventional laminated film and to provide an adhesive structure and a peeling method thereof that can reliably and easily peel only the uppermost film of the laminated film.

本発明は、上記課題を解決するものであり、基材に接着された少なくとも２層からなる積層フィルムの接着構造であって、積層されたフィルムのうち少なくとも基材に接着される最下層フィルムは延伸性を有する素材で形成され、積層されたフィルムのうち少なくとも前記最下層フィルム上に積層される上層フィルムは延伸性をほとんどまたは全く有さない素材で形成され、前記最下層フィルムと前記上層フィルムとは互いに剥離可能に積層され、前記基材の接着面の一部には凹部を形成し、該凹部において前記最下層フィルムと接着用平板部の間に空間を設け非接着面を形成したことを特徴とする積層フィルムの接着構造である。   The present invention solves the above problems, and is an adhesive structure of a laminated film composed of at least two layers adhered to a base material, and the lowest film adhered to at least the base material among the laminated films is An upper film formed of a material having stretchability and laminated on at least the lowermost film among the laminated films is formed of a material having little or no stretchability, and the lowermost film and the upper film And a non-adhesive surface in which a space is formed between the lowermost film and the flat plate portion for bonding in the concave portion. It is the adhesion structure of the laminated film characterized by these.

また、本発明は、前記積層フィルムの剥離方法であって、前記凹部において前記基材を凹部形成面とは反対側に曲げることにより前記上層フィルムが前記最下層フィルムより剥離されることを特徴とする積層フィルムの剥離方法である。   Further, the present invention is a method for peeling the laminated film, wherein the upper film is peeled from the lowermost film by bending the base material in the concave portion to the side opposite to the concave portion forming surface. It is the peeling method of the laminated | multilayer film to perform.

本発明にかかる積層フィルムの接着構造は、積層するフィルムの延伸性の差異を利用し、フィルムが貼付された基材を折り曲げるだけで、最下層のフィルムを残して上層のフィルムを容易に剥離することが可能である。   The adhesive structure of the laminated film according to the present invention utilizes the difference in stretchability of the laminated films, and simply folds the base material to which the film is attached, leaving the lowermost film and easily peeling the upper film. It is possible.

本発明の積層フィルムの接着構造の部分断面図Partial sectional view of the adhesive structure of the laminated film of the present invention 本発明の積層フィルムの上層フィルムを剥離している状態を表す部分断面図The fragmentary sectional view showing the state which has peeled the upper layer film of the laminated | multilayer film of this invention 本発明の積層フィルムが適用される容器の斜視図The perspective view of the container to which the laminated film of this invention is applied

以下、本発明の試薬容器の実施態様を、図面に基づいて具体的に説明する。なお、本発明はこれら実施態様に何ら制約されるものではない。   Hereinafter, embodiments of the reagent container of the present invention will be specifically described with reference to the drawings. Note that the present invention is not limited to these embodiments.

図１は本発明の積層フィルムの接着構造の部分断面図、図２は本発明の積層フィルムの上層フィルムを剥離している状態を表す部分断面図である。図中、１は積層フィルム、２は基材、１１は最下層フィルム、１２は上層フィルム、１３は最上層フィルム、２１は接着面、２２は凹部、２３は非接着面をそれぞれ示す。   FIG. 1 is a partial cross-sectional view of the laminated film adhesive structure of the present invention, and FIG. 2 is a partial cross-sectional view showing a state where the upper film of the laminated film of the present invention is peeled off. In the figure, 1 is a laminated film, 2 is a substrate, 11 is a lowermost film, 12 is an upper film, 13 is an uppermost film, 21 is an adhesive surface, 22 is a recess, and 23 is a non-adhesive surface.

図１に示すように、本発明の積層フィルム１は３層構造となっており、基材２の接着面２１に接着されている。ここでいう基材とは、典型的には収納部を有する容器の開口部縁より外側に突出形成された板状部（フランジ片）などが例示されるが、これに限定されるものではない。   As shown in FIG. 1, the laminated film 1 of the present invention has a three-layer structure and is bonded to the bonding surface 21 of the substrate 2. Examples of the base material here include a plate-like portion (flange piece) that is typically formed to protrude outward from the opening edge of the container having a storage portion, but is not limited thereto. .

以下に、本発明の積層フィルム１の構造について説明する。最下層フィルム１１は適度な延伸性を有する直鎖状低密度ポリエチレン（ＬＬＤＰＥ）であり、この上に、バリア機能を有するアルミ箔等の金属箔、アルミ蒸着フィルム、ポリエチレンテレフタレートフィルム（ＰＥＴ）、または、ポリプロピレン（ＰＰ）からなる上層フィルム１２をドライラミネート方式により積層する。そして、さらにその上から、同じくドライラミネート方式によりＰＥＴからなる最上層フィルム１３を積層する。   Below, the structure of the laminated | multilayer film 1 of this invention is demonstrated. The lowermost layer film 11 is a linear low density polyethylene (LLDPE) having appropriate stretchability, and a metal foil such as an aluminum foil having a barrier function, an aluminum deposited film, a polyethylene terephthalate film (PET), or The upper film 12 made of polypropylene (PP) is laminated by a dry lamination method. Further, the uppermost layer film 13 made of PET is laminated from the top by the same dry laminating method.

本実施態様において、最下層フィルム１１はＬＬＤＰＥを選択しているが、適度な延伸性を得られるものであれば、この素材に限定されない。なお、ここで適度な延伸性とは、幅３ｃｍ×長さ１０ｃｍのフィルムに加重１．５ｋｇをかけた状態で伸度を測定して、１００％以上の伸度を有していればよい。また、最下層フィルム１１は基材２の接着面２１に対し熱融着により接着されているが、接着方法はこれに限定されず、上層フィルム１２は最下層フィルム１１から剥離される際に、最下層フィルム１１と基材２の間に剥離が生じない程度の強度を有するものであれば、公知の接着手段を採用することができる。   In this embodiment, LLDPE is selected as the lowermost layer film 11, but the lower layer film 11 is not limited to this material as long as appropriate stretchability can be obtained. In addition, moderate stretchability here should just have an elongation of 100% or more, when elongation is measured in the state which applied a 1.5 kg load to the film of width 3cm x length 10cm. In addition, the lowermost film 11 is bonded to the bonding surface 21 of the substrate 2 by heat fusion, but the bonding method is not limited to this, and when the upper film 12 is peeled from the lowermost film 11, Any known bonding means can be used as long as it has a strength that does not cause peeling between the lowermost layer film 11 and the substrate 2.

最下層フィルム１１上に積層される上層フィルム１２としては、アルミ箔等の金属箔、ＰＥＴ、ＰＰ等を適宜選択することができるが、延伸性をほとんど、または、全く有さない素材であれば、特にこれらに限定されるものではない。ただし、容器の内容物の保存性向上のため、ガスバリア機能を有するものであることが好ましい。また、上層フィルム１２は最下層フィルム１１に対し、ドライラミネート方式により接着されているが、両者が剥離可能な程度に接着されればその方法に限定されない。   As the upper layer film 12 laminated on the lowermost layer film 11, a metal foil such as an aluminum foil, PET, PP, etc. can be selected as appropriate. However, as long as the material has little or no stretchability. However, it is not particularly limited to these. However, in order to improve the storage stability of the contents of the container, it is preferable to have a gas barrier function. Moreover, although the upper layer film 12 is adhere | attached with the lowermost layer film 11 by the dry lamination system, if both are adhere | attached to such an extent that it can peel, it will not be limited to the method.

本実施態様において、最上層フィルム１３はＰＥＴを選択しているが、素材はこれに限らず、また、延伸性の有無についても問わない。また、本実施態様では、積層フィルム１は３層構造となっているが、これを最下層フィルム１１と上層フィルム１２の２層構造としてもよく、また、最上層フィルム１３の上に更にフィルムを積層して４層構造としてもよい。   In this embodiment, PET is selected as the uppermost layer film 13, but the material is not limited to this, and the presence or absence of stretchability is not questioned. In this embodiment, the laminated film 1 has a three-layer structure. However, the laminated film 1 may have a two-layer structure of a lowermost film 11 and an upper film 12, and a film is further formed on the uppermost film 13. A four-layer structure may be formed by stacking.

図３は、本発明の積層フィルムが好適に適用される容器の一態様を表す。図に示すように、本実施態様における基材２は、容器本体３の開口部３１の周縁より外側に突出形成されたフランジ片を構成している。基材２の接着面２１は、最下層フィルム１１が接着しやすいように平面に形成されているが、その一部に凹部２２を有している。かかる凹部２２は一定の長さ・幅・深さを持った溝状に形成されており、この部分において最下層フィルム１１と接着用平板部２との間に空間が形成されるため、これにより、最下層フィルム１１が接着されていない非接着面２３が形成される。本実施態様では、凹部２２の断面形状が矩形に形成されているが、断面形状はこれに限らず、正方形、半円形、半楕円形、三角形などとしてもよい。凹部２２の幅Ｗは、非接着面２３が確保できれば特に限定されず、０．５ｍｍ＜Ｗであれば好ましい。また、深さＤについては、接着用平板部２の厚さＴに対し、０．２Ｔ＜Ｄ＜０．７Ｔの範囲であれば好ましい。また、凹部２２を形成する位置に関しては、積層フィルム１の剥離に支障がなければ特に制限されないが、接着用平板部２の端部に近い部分で、後述の折り曲げ作業が行いやすい箇所が好ましい。例えば、本実施態様では、基材２の角付近を折り曲げ部２４とし、かかる折り曲げ部２４と開口部３１の間に凹部２２を形成している。また、容器本体３および基材２の素材は直鎖状低密度ポリエチレン（ＬＬＤＰＥ）が好ましいが、容器の成形性や接着性の条件を満たすものであれば、特にこれに限らない。   FIG. 3 shows an embodiment of a container to which the laminated film of the present invention is suitably applied. As shown in the figure, the base material 2 in the present embodiment constitutes a flange piece that is formed to protrude outward from the peripheral edge of the opening 31 of the container body 3. The adhesion surface 21 of the substrate 2 is formed in a flat surface so that the lowermost film 11 can be easily adhered, but has a recess 22 in a part thereof. The concave portion 22 is formed in a groove shape having a certain length, width and depth, and a space is formed between the lowermost layer film 11 and the flat plate portion 2 for bonding in this portion. A non-adhesive surface 23 to which the lowermost film 11 is not adhered is formed. In this embodiment, the cross-sectional shape of the recess 22 is formed in a rectangular shape, but the cross-sectional shape is not limited to this, and may be a square, a semicircular shape, a semi-elliptical shape, a triangular shape, or the like. The width W of the recess 22 is not particularly limited as long as the non-adhesive surface 23 can be secured, and is preferably 0.5 mm <W. The depth D is preferably in the range of 0.2T <D <0.7T with respect to the thickness T of the bonding flat plate portion 2. Further, the position at which the concave portion 22 is formed is not particularly limited as long as it does not interfere with the peeling of the laminated film 1, but a portion near the end of the bonding flat plate portion 2 that is easy to be bent later is preferable. For example, in the present embodiment, the bent portion 24 is formed near the corner of the substrate 2, and the concave portion 22 is formed between the bent portion 24 and the opening 31. The material of the container body 3 and the base material 2 is preferably linear low density polyethylene (LLDPE), but is not particularly limited as long as it satisfies the moldability and adhesive properties of the container.

次に、本発明の積層フィルム１の剥離の方法について図２により説明する。まず、積層フィルム１が接着された状態の接着用平板部２のうち、凹部２２の形成された部分より外側、すなわち、図３の態様では折り曲げ部２４を凹部２２の形成面とは反対側に押し下げる。このとき、凹部２２部分は他の部分に比べ厚みが薄いため、凹部２２部分を押し曲げ支点として容易に曲げることができる。このように、接着用平板部２が下方に湾曲するに従い、積層フィルム１には曲げ方向に引っ張られる力が働く。このとき、延伸性を有する最下層フィルム１１は接着用平板部２に追従して伸びるが、延伸性をほとんどまたは全く有さない上層フィルム１２は、最下層フィルム１１に追従することができず、上層フィルム１２と接着剤層との間でずれようとする応力がかかる。そして、接着剤層の接着力が耐えられなくなった時点で最下層フィルム１１から上層フィルム１２の一部が剥離する。こうして剥離した部分の上層フィルム１２を指で保持し、最下層フィルム１１から引きはがすことにより、残りの部分の剥離が完了する。   Next, a method for peeling the laminated film 1 of the present invention will be described with reference to FIG. First, in the flat plate portion 2 for bonding with the laminated film 1 adhered, the outer side of the portion where the concave portion 22 is formed, that is, the bent portion 24 is on the side opposite to the surface where the concave portion 22 is formed in the embodiment of FIG. Press down. At this time, since the concave portion 22 is thinner than the other portions, the concave portion 22 can be easily bent as a pressing and bending fulcrum. In this way, as the bonding flat plate portion 2 bends downward, a force that is pulled in the bending direction acts on the laminated film 1. At this time, the lowermost film 11 having stretchability extends following the adhesive flat plate portion 2, but the upper film 12 having little or no stretchability cannot follow the lowermost film 11, Stress that tends to shift between the upper film 12 and the adhesive layer is applied. And when the adhesive force of an adhesive bond layer becomes unbearable, a part of upper layer film 12 peels from the lowermost layer film 11. FIG. The upper layer film 12 thus peeled is held with a finger and peeled off from the lowermost film 11 to complete the peeling of the remaining part.

本発明の積層フィルムの接着構造とその剥離方法は、内容物の如何にかかわらず、二重蓋構造を有する容器に適用することが可能である。さらに、本発明は医薬品、化粧品、食品等の分野に幅広く応用することができる。   The adhesive structure of the laminated film of the present invention and the peeling method thereof can be applied to a container having a double lid structure regardless of the contents. Furthermore, the present invention can be widely applied to fields such as pharmaceuticals, cosmetics, and foods.

１ … … 積層フィルム
２ … … 接着用平板部
３ … … 容器本体
１１ … … 最下層フィルム
１２ … … 上層フィルム
１３ … … 最上層フィルム
２１ … … 接着面
２２ … … 凹部
２３ … … 非接着面
２４ … … 折り曲げ部
３１ … … 収容部
DESCRIPTION OF SYMBOLS 1 ...... Laminated film 2 ...... Flat part for adhesion 3 ...... Container body
11…… Bottom layer film 12…… Top layer film 13…… Top layer film
21…… Adhesive surface 22…… Recessed portion 23…… Non-adhesive surface 24…… Folded portion 31…… Accommodating portion

Claims (6)

基材に接着された少なくとも２層からなる積層フィルムの接着構造であって、積層されたフィルムのうち少なくとも前記基材に接着される最下層フィルムは延伸性を有する素材で形成され、積層されたフィルムのうち少なくとも前記最下層フィルム上に積層される上層フィルムは延伸性をほとんどまたは全く有さない素材で形成され、前記最下層フィルムと前記上層フィルムとは互いに剥離可能に積層され、前記基材の接着面の一部には凹部を形成し、該凹部において前記最下層フィルムと前記基材の間に空間を設け非接着面を形成したことを特徴とする積層フィルムの接着構造。   It is an adhesive structure of a laminated film consisting of at least two layers adhered to a base material, and at least the lowermost film adhered to the base material among the laminated films is formed of a stretchable material and laminated Of the films, the upper film laminated on at least the lowermost film is formed of a material having little or no stretchability, and the lowermost film and the upper film are laminated so as to be peelable from each other, A laminated film adhesive structure, wherein a concave portion is formed in a part of the adhesive surface, and a non-adhesive surface is formed by providing a space between the lowermost film and the base material in the concave portion. 前記上層フィルムの上に更に最上層フィルムを積層させ、積層フィルムを３層構造としたことを特徴とする請求項１に記載の積層フィルムの接着構造。   2. The laminated film adhesive structure according to claim 1, wherein an uppermost layer film is further laminated on the upper layer film, and the laminated film has a three-layer structure. 請求項１または２に記載の積層フィルムの接着構造であって、前記積層フィルムを構成する素材のうち、前記最下層フィルムが直鎖状低密度ポリエチレンにより構成されていることを特徴とする積層フィルムの接着構造。   3. The laminated film adhesive structure according to claim 1, wherein, among the materials constituting the laminated film, the lowermost film is made of linear low-density polyethylene. Adhesive structure. 請求項１または２に記載の積層フィルムの接着構造であって、前記上層フィルムがアルミ箔等の金属箔、アルミ蒸着フィルム、ポリエチレンテレフタレートフィルム、またはプリプロピレンの群からなるバリア性を有する素材の少なくとも１種類から構成されていることを特徴とする積層フィルムの接着構造。   3. The laminated film adhesive structure according to claim 1 or 2, wherein the upper film is at least a material having a barrier property consisting of a metal foil such as an aluminum foil, an aluminum vapor-deposited film, a polyethylene terephthalate film, or a propylene group. 1. A laminated film adhesive structure characterized by comprising one type. 前記最下層フィルムの延伸性が、幅３ｃｍ×長さ１０ｃｍのフィルムに加重１．５ｋｇをかけた状態で伸度を測定した場合、１００％以上であることを特徴とする請求項１ないし４のいずれかに記載の積層フィルムの接着構造。   The stretchability of the lowermost film is 100% or more when the elongation is measured with a weight of 1.5 kg applied to a film having a width of 3 cm and a length of 10 cm. The adhesive structure of the laminated film in any one. 請求項１ないし５のいずれかに記載の積層フィルムの剥離方法であって、前記凹部を折り曲げ支点として前記基材を凹部形成面とは反対側に折り曲げることにより前記上層フィルムが前記最下層フィルムより剥離されることを特徴とする積層フィルムの剥離方法。
It is the peeling method of the laminated | multilayer film in any one of Claim 1 thru | or 5, Comprising: The said upper layer film is more than the said lowermost layer film by bend | folding the said base material on the opposite side to a recessed part formation surface by using the said recessed part as a bending fulcrum. A method for peeling a laminated film, characterized by being peeled off.
JP2011229717A 2011-10-19 2011-10-19 Laminated film adhesive structure and peeling method therefor Pending JP2013086851A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11506716A (en) * 1995-06-06 1999-06-15 ダブリユ・アール・グレイス・アンド・カンパニー−コネテイカツト Modified atmosphere package with double cover
JP2004142802A (en) * 2002-10-25 2004-05-20 Toppan Printing Co Ltd Peelable lid material
JP2008044657A (en) * 2006-08-18 2008-02-28 Toyo Aluminium Kk Lid member, package, and manufacturing method of the package

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62168365U (en) * 1986-04-15 1987-10-26
JPH0387675U (en) * 1989-12-22 1991-09-06

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11506716A (en) * 1995-06-06 1999-06-15 ダブリユ・アール・グレイス・アンド・カンパニー−コネテイカツト Modified atmosphere package with double cover
JP2004142802A (en) * 2002-10-25 2004-05-20 Toppan Printing Co Ltd Peelable lid material
JP2008044657A (en) * 2006-08-18 2008-02-28 Toyo Aluminium Kk Lid member, package, and manufacturing method of the package

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