JP2009184690A - Self-standing bag - Google Patents

Self-standing bag Download PDF

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JP2009184690A
JP2009184690A JP2008024845A JP2008024845A JP2009184690A JP 2009184690 A JP2009184690 A JP 2009184690A JP 2008024845 A JP2008024845 A JP 2008024845A JP 2008024845 A JP2008024845 A JP 2008024845A JP 2009184690 A JP2009184690 A JP 2009184690A
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self
standing
bag
air
oxygen
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Shinya Ochiai
信哉 落合
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Toppan Inc
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Toppan Printing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-standing bag storing and packaging a liquid, solid, powder, or granular body, or the like, which does not receive such influences of air leakage when sealing is performed and decrease in pressure under a low temperature condition, in manufacturing the self-standing bag having a supporting structure for holding self-standing of a flexible packaging bag container. <P>SOLUTION: The self-standing bag in which a mixed gas consisting of nitrogen of more than 78.084% and oxygen of less than 20.946% in volume ratio is sealed in a gap part, can hold the self-standing properties by always keeping the gap part to have a positive pressure by a difference in partial pressure between the mixed gas filled in the gap part and atmospheric air, even if a decrease in pressure due to air leakage or change in the environment of use is caused. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

本発明は、液体、固体、粉体、粒状体等を収納包装する軟包装袋容器に関し、この袋容器に特定の機能を持たせることで、耐衝撃性や様々な使い勝手等を向上させる自立袋に関するものである。 The present invention relates to a flexible packaging bag container for storing and packaging liquids, solids, powders, granular materials, etc., and by providing the bag container with a specific function, a free-standing bag that improves impact resistance, various usability, etc. It is about.

従来より、三方シール、四方シール、ピロー、ガゼットピロー、ステンディングパウチ、口栓付きパウチ等の軟包装袋容器を用いた液体、粉体、固体や液体の混合体、粒状体等を収納する様々な軟包装袋容器が用いられている。これらの軟包装袋容器は、圧縮性やフレキシブル性に優れている反面、充填された内容物等が減少した際の容器としての保形性に乏しく、このために様々な弊害を有している。 Conventionally, liquids, powders, solids and liquid mixtures, granular materials, etc. using soft packaging bags such as three-side seals, four-side seals, pillows, gusset pillows, tending pouches, and pouches with plugs A flexible packaging bag container is used. These soft packaging bag containers are excellent in compressibility and flexibility, but have poor shape retention as containers when the filled contents are reduced, and thus have various harmful effects. .

これらに対して、近年、内容物が充填され店頭等に陳列した際、自立性を有する軟包装袋等の容器としてスタンディングパウチ等が広い分野で採用されており、使い切りユースの詰替用から再封性を有するものまで様々な用途に使用されている。   On the other hand, in recent years, standing pouches, etc. have been adopted in a wide range of fields as containers for flexible packaging bags and the like that are self-supporting when they are filled with contents and displayed at stores, etc. It is used for various purposes up to those with sealing properties.

しかしながら、これらのスタンディングパウチは陳列での経時や内容物を使用して充填した中身が少なくなった場合に、袋自体の腰砕けにより自立性が保てなくなることや、中身の開け替え時に両手で保持する必要がある等の問題を有している。   However, these standing pouches will not be able to maintain their independence due to the crunch of the bag itself, or if the contents filled with the contents of the standing pouch will decrease, or be held with both hands when opening the contents There is a problem that needs to be done.

これらの問題を解決するために、貼り合わせ部(シール部)内にエアバック部と呼称される空隙部を設けた構造とし、この空隙部に気体を封入してその内圧により、自立性を保持する自立袋が提案されている。
特開2005-343492号公報
In order to solve these problems, a structure called an air bag part is provided in the bonding part (seal part), and gas is sealed in this gap part to maintain its self-sustainability by its internal pressure. Self-supporting bags have been proposed.
JP 2005-343492 A

自立袋の製造においては、先ず、被包装内容物を充填する前に、空隙部に大気圧以上の空気を送り込み、空隙部を膨らませてエアバック部を形成する。次いで、エアバック部が十分に膨らんだ時点で、空気封入口部分をヒートシール乃至は超音波シール等の手段を用いて密封し、空気の通り路を遮断してエアバック部を密閉する。これによって、各々のエアバック部は、完全に独立した空気柱を形成し、軟包装袋容器の自立を保持する支持構造となるものである。   In manufacturing a self-supporting bag, first, before filling the contents to be packaged, air at atmospheric pressure or higher is fed into the gap, and the gap is inflated to form an airbag portion. Next, when the airbag portion is sufficiently inflated, the air filling port portion is sealed using means such as heat sealing or ultrasonic sealing, the air passage is blocked and the airbag portion is sealed. Accordingly, each airbag portion forms a completely independent air column and becomes a support structure for holding the self-supporting flexible packaging bag container.

しかしながら、空隙内部を陽圧のままシールしなければならないため、シール時のエア漏れによって内圧が低下するなどの不都合が生じていた。   However, since the inside of the air gap must be sealed with a positive pressure, inconveniences such as a decrease in internal pressure due to air leakage during sealing have occurred.

また、気温が下がったり、冷蔵品などの低温保存容器に使用する場合などは、内圧が低下して自立性が損なわれるなどの不都合が生じていた。   In addition, when the temperature is lowered or the container is used for a low-temperature storage container such as a refrigerated product, there are inconveniences such as a decrease in internal pressure and a loss of independence.

本発明の自立袋においては、以上のようなエア漏れや使用環境変化による圧力の低下を生じても、空隙部に充填した混合ガスと大気(空気)との分圧差により、常に空隙部が陽圧となり、自立性を保つことが可能となる。   In the self-supporting bag of the present invention, even if the above-described air leakage or a decrease in pressure due to changes in the usage environment occurs, the gap is always positive due to the partial pressure difference between the mixed gas filled in the gap and the atmosphere (air). It becomes possible to maintain independence.

請求項1に係る発明は、プラスチックフィルムまたはプラスチックフィルム積層体よりなる包装体容器を構成する貼り合わせ箇所の一部に空隙部を形成し、該空隙部に気体封入
を行い、自立性を持たせた容器において、体積比で78.084%を超える窒素と20.946%未満の酸素からなる気体が封入されていることを特徴とする自立袋である。
The invention according to claim 1 is to provide a self-supporting property by forming a void portion in a part of a bonding portion constituting a packaging container made of a plastic film or a plastic film laminate, and performing gas sealing in the void portion. The self-standing bag is characterized in that a gas comprising nitrogen exceeding 78.084% by volume and oxygen less than 20.946% is enclosed in a container.

請求項2に係る発明は、自立袋を構成するプラスチックフィルムまたはプラスチックフィルム積層体の25℃65%RHにおける酸素透過率が400(ml/m2/day/MPa)以上であることを特徴とする請求項1に記載の自立袋である。 The invention according to claim 2 is characterized in that the oxygen permeability at 25 ° C. and 65% RH of the plastic film or plastic film laminate constituting the self-supporting bag is 400 (ml / m 2 / day / MPa) or more. A self-supporting bag according to claim 1.

本発明により、自立袋の空隙部にガスを封入する際には特に圧力を高める必要がなく、気温が下がったり、冷蔵品などの低温環境での容器として使用する場合でも自立性を保持することができる。   According to the present invention, it is not necessary to increase the pressure particularly when enclosing gas in the void portion of the self-supporting bag, and the self-supporting property is maintained even when the temperature is lowered or the container is used in a low temperature environment such as a refrigerated product. Can do.

プラスチックフィルムの酸素透過率と窒素透過率を比較すると、酸素透過率が大きく、窒素透過率の約2.5倍から8倍の透過率を有している。   When the oxygen permeability and nitrogen permeability of the plastic film are compared, the oxygen permeability is large and the permeability is about 2.5 to 8 times the nitrogen permeability.

本発明は、プラスチックフィルムまたはプラスチックフィルム積層体よりなる自立袋の空隙部に、体積比として大気(空気)よりも窒素比率が多く、かつ酸素比率が小さい混合ガスを封入したので、エアバック内部と外部との間に分圧差が生じる。   In the present invention, since a mixed gas having a larger nitrogen ratio and a smaller oxygen ratio than the atmosphere (air) as a volume ratio is sealed in a gap of a self-supporting bag made of a plastic film or a plastic film laminate, There is a partial pressure difference with the outside.

封入する混合ガスの酸素と窒素の濃度は、体積比で、酸素が20.946%未満、窒素が78.084%を超える濃度となるようにする必要があり、好ましくは、酸素が10%以下、かつ窒素が90%以上となるように混合ガスを充填することが好ましい。   The concentration of oxygen and nitrogen in the mixed gas to be sealed must be such that oxygen is less than 20.946% and nitrogen is more than 78.084%, preferably oxygen is 10% or less and nitrogen is contained. It is preferable to fill the mixed gas so as to be 90% or more.

酸素の透過率と窒素の透過率とでは、酸素の透過率が大きいため、分圧差を解消するため、外部の大気(空気)よりエアバック内に酸素が透過し、エアバックは膨張し、結果として自立性が保持される。   The oxygen permeability and the nitrogen permeability are large, and the oxygen permeability is large, so that the partial pressure difference is eliminated, so that oxygen permeates into the airbag from the external atmosphere (air), and the airbag expands. Independence is maintained.

本発明に用いるプラスチックフィルムおよびプラスチックフィルム積層体の25℃65%RHにおける酸素透過率は400(ml/m2/day/MPa)以上であることが必要であり、好ましくは4,000(ml/m2/day/MPa)以上である。 The oxygen permeability of the plastic film and plastic film laminate used in the present invention at 25 ° C. and 65% RH needs to be 400 (ml / m 2 / day / MPa) or more, preferably 4,000 (ml / m 2). / day / MPa) or more.

これらを満足するプラスチックフィルムとしては、一般的な包装材料として使用される厚みにおいては、ポリエチレンテレフタレート(PET)フィルム、ポリアミド(Ny)フィルム、ポリプロピレン(PP)フィルム、ポリエチレン(PE)フィルム、およびこれらの積層体が使用可能である。   As plastic films that satisfy these requirements, polyethylene terephthalate (PET) films, polyamide (Ny) films, polypropylene (PP) films, polyethylene (PE) films, and A laminate can be used.

これらを積層する方法としては、ドライラミネート法、溶融押し出しラミネート法など公知の技術が使用可能である。   As a method for laminating them, known techniques such as a dry laminating method and a melt extrusion laminating method can be used.

本発明の実施例を図を参照しながら説明する。
(実施例1)
延伸ポリプロピレンフィルム(OPP、20μm)と直鎖状低密度ポリエチレンフィルム(LLDPE、50μm)とをドライラミネートにより積層し、ヒートシール法により図1にその断面を示す空パウチを作製した。
Embodiments of the present invention will be described with reference to the drawings.
(Example 1)
A stretched polypropylene film (OPP, 20 μm) and a linear low density polyethylene film (LLDPE, 50 μm) were laminated by dry lamination, and an empty pouch whose cross section was shown in FIG.

この積層体の酸素透過度は、25,000(ml/m2/day/MPa)であった(モコン法、30℃、70%RH)。 The oxygen permeability of this laminate was 25,000 (ml / m 2 / day / MPa) (Mocon method, 30 ° C., 70% RH).

左右の空隙部に、酸素・窒素混合ガス(酸素濃度10%、窒素濃度90%、体積比)をそれぞれ6mlずつ充填、シールし(作業環境の室温:30℃)、図2にその断面を示すエアバック(3)を有するパウチを作製した。   6ml each of oxygen and nitrogen mixed gas (oxygen concentration 10%, nitrogen concentration 90%, volume ratio) is filled and sealed in the left and right gaps (room temperature of the working environment: 30 ° C), and Fig. 2 shows the cross section A pouch having an airbag (3) was produced.

内容物として、水150ml(5)を充填、ヘッドスペースに空気が残らないようにシール(6)し、図3にその断面を示す包装体を作成した。図4はその外観を示す説明図である。
(実施例2)
実施例1の延伸ポリプロピレンフィルム(OPP、20μm)を延伸ポリアミドフィルム(ONy、15μm)に代えた他は、実施例1と同様に図3、図4に示す包装体を作製した。
The contents were filled with 150 ml (5) of water, sealed so that no air remained in the head space (6), and a package having a cross section shown in FIG. 3 was prepared. FIG. 4 is an explanatory view showing the appearance.
(Example 2)
A package shown in FIGS. 3 and 4 was produced in the same manner as in Example 1 except that the stretched polypropylene film (OPP, 20 μm) of Example 1 was replaced with a stretched polyamide film (ONy, 15 μm).

ただし、この積層体の酸素透過度は、1,000(ml/m2/day/MPa)であった(モコン法、30℃、70%RH)。
(比較例1)
実施例1の延伸ポリプロピレンフィルム(OPP、20μm)をシリカ蒸着OPPフィルム(20μm)に代えた他は、実施例1と同様に図3、図4に示す包装体を作製した。
However, the oxygen permeability of this laminate was 1,000 (ml / m 2 / day / MPa) (Mocon method, 30 ° C., 70% RH).
(Comparative Example 1)
The package shown in FIGS. 3 and 4 was produced in the same manner as in Example 1 except that the stretched polypropylene film (OPP, 20 μm) of Example 1 was replaced with a silica-deposited OPP film (20 μm).

ただし、この積層体の酸素透過度は、20(ml/m2/day/MPa)であった(モコン法、30℃、70%RH)。
(比較例2)
実施例1の空隙部に充填するガスを空気に代えた他は、実施例1と同様に図3、図4に示す包装体を作製した。
(比較例3)
実施例2の空隙部に充填するガスを空気に代えた他は、実施例2と同様に図3、図4に示す包装体を作製した。
(実験)
以上の包装体を5℃で1ヶ月間保存後、観察を行った。
(結果)
実施例1および2の包装体は、エアバック部の収縮は認められず、自立性を保っていた。
However, the oxygen permeability of this laminate was 20 (ml / m 2 / day / MPa) (Mocon method, 30 ° C., 70% RH).
(Comparative Example 2)
The package shown in FIGS. 3 and 4 was produced in the same manner as in Example 1 except that the gas filled in the gaps in Example 1 was replaced with air.
(Comparative Example 3)
A package shown in FIGS. 3 and 4 was produced in the same manner as in Example 2 except that the gas filled in the gaps in Example 2 was replaced with air.
(Experiment)
The above packaging was stored at 5 ° C. for 1 month and then observed.
(result)
In the packaging bodies of Examples 1 and 2, no contraction of the airbag portion was observed and the self-supporting property was maintained.

一方、比較例1、2、および3の包装体は、エアバック部が収縮し、自立性を失っていた。   On the other hand, in the packaging bodies of Comparative Examples 1, 2, and 3, the airbag portion contracted and lost its independence.

本発明による包装体は、温度の変化により一旦はエアバック部のガスが収縮しても、分圧差により、外部より積層体を通して酸素が進入し、自立性を保つことが示された。   It has been shown that the package according to the present invention maintains its independence by oxygen entering from the outside through the laminate due to the partial pressure difference even if the gas in the airbag portion contracts once due to temperature change.

一方、比較例2、および3のように、空隙部に空気を充填した包装体は、低温で保管すると、エアバック部の空気が収縮し、自立性を失うことが示された。   On the other hand, as shown in Comparative Examples 2 and 3, it was shown that when the packaging body in which the air gap was filled with air was stored at a low temperature, the air in the airbag portion contracted and lost its independence.

また、比較例1のように、酸素透過率が低いと、エアバック内に酸素が進入することができず、低温で保管すると、エアバック部の空気が収縮し、自立性を失うことが示された。   Further, as in Comparative Example 1, when the oxygen permeability is low, oxygen cannot enter the airbag, and when stored at a low temperature, the air in the airbag section contracts and loses its independence. It was done.

本発明の実施例を説明するための説明図。Explanatory drawing for demonstrating the Example of this invention. 本発明の実施例を説明するための説明図。Explanatory drawing for demonstrating the Example of this invention. 本発明の実施例を説明するための説明図。Explanatory drawing for demonstrating the Example of this invention. 本発明による包装体を示す説明図。Explanatory drawing which shows the package by this invention.

符号の説明Explanation of symbols

1…ヒートシール部
2…空隙部
3…エアバック部
4…ヒートシール部
5…水
6…シール
7…ヘッドスペース
DESCRIPTION OF SYMBOLS 1 ... Heat seal part 2 ... Air gap part 3 ... Air bag part 4 ... Heat seal part 5 ... Water 6 ... Seal 7 ... Head space

Claims (2)

プラスチックフィルムまたはプラスチックフィルム積層体よりなる包装体容器を構成する貼り合わせ箇所の一部に空隙部を形成し、該空隙部に気体封入を行い、自立性を持たせた容器において、体積比で78.084%を超える窒素と20.946%未満の酸素からなる気体が封入されていることを特徴とする自立袋。   In a container having a self-supporting property, a void is formed in a part of a bonding portion constituting a packaging container made of a plastic film or a plastic film laminated body, and gas is sealed in the void, so that the volume ratio is 78.084. A self-supporting bag, characterized in that it is filled with a gas comprising more than% nitrogen and less than 20.946% oxygen. 自立袋を構成するプラスチックフィルムまたはプラスチックフィルム積層体の25℃65%RHにおける酸素透過率が400(ml/m2/day/MPa)以上であることを特徴とする請求項1に記載の自立袋。 The self-supporting bag according to claim 1, wherein the plastic film or the plastic film laminate constituting the self-supporting bag has an oxygen permeability of 400 (ml / m 2 / day / MPa) or more at 25 ° C and 65% RH. .
JP2008024845A 2008-02-05 2008-02-05 Self-standing bag Pending JP2009184690A (en)

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