JPH08301296A - Inner bag for bag-in box - Google Patents
Inner bag for bag-in boxInfo
- Publication number
- JPH08301296A JPH08301296A JP7110457A JP11045795A JPH08301296A JP H08301296 A JPH08301296 A JP H08301296A JP 7110457 A JP7110457 A JP 7110457A JP 11045795 A JP11045795 A JP 11045795A JP H08301296 A JPH08301296 A JP H08301296A
- Authority
- JP
- Japan
- Prior art keywords
- bag
- film
- inner bag
- layer
- box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 229920001684 low density polyethylene Polymers 0.000 claims description 30
- 239000004702 low-density polyethylene Substances 0.000 claims description 30
- 229920001903 high density polyethylene Polymers 0.000 claims description 15
- 239000004700 high-density polyethylene Substances 0.000 claims description 15
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 25
- 239000011347 resin Substances 0.000 description 11
- 229920005989 resin Polymers 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 238000004804 winding Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 235000013365 dairy product Nutrition 0.000 description 4
- 239000006071 cream Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000008267 milk Substances 0.000 description 3
- 235000013336 milk Nutrition 0.000 description 3
- 210000004080 milk Anatomy 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Bag Frames (AREA)
- Packages (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、バッグインボックス用
内袋に関し、特には、牛乳、クリーム等の乳製品のよう
に、容器包装から溶出してくる物質が非常に少ないレベ
ルであることが要求される内容物を収納するバッグイン
ボックス用の内袋に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner bag for a bag-in-box, and in particular, it has a very low level of substances eluted from containers and packaging such as milk and dairy products such as cream. The present invention relates to an inner bag for a bag-in-box that stores required contents.
【０００２】[0002]
【従来の技術】従来、収納物が乳製品、特に牛乳やクリ
ームの場合、前述の通り収納物への影響を考慮して、無
添加ポリエチレンを材料とする包装材料が使用されてい
る。2. Description of the Related Art Conventionally, when the contents are dairy products, particularly milk and cream, a packaging material made of additive-free polyethylene is used in consideration of the influence on the contents as described above.
【０００３】業務用の大型液体容器として用いられるバ
ッグインボックス用の内袋フィルムについても、例え
ば、無添加低密度ポリエチレン（以下ＬＤＰＥと省略す
る）を最内層とし、その外側に無添加高密度ポリエチレ
ン（以下ＨＤＰＥと省略する）を中間層とし、この両側
にＬＤＰＥを配した３層共押し出しフィルムを２枚重ね
たタイプ等が検討されている。具体的には、容量２０リ
ットル用の内袋フィルムとして、例えば、（接液側）Ｌ
ＤＰＥ（６０μ厚）＋ＬＤＰＥ（４０μ厚）／ＨＤＰＥ
（４０μ厚）／ＬＤＰＥ（４０μ厚）＋ＬＤＰＥ（４０
μ厚）／ＨＤＰＥ（４０μ厚）／ＬＤＰＥ（４０μ厚）
（紙箱側）が挙げられる。しかし、この層構成にあって
は、特にトップシールまたはボトムシールが最初に落下
面に接地するボトム落下と呼ばれる落とし方をした場合
には、内袋のフィルムの流れ方向と平行に設けられたサ
イドシール部が破れて、そこから液漏れ等の事故が発生
していた。As for the inner bag film for a bag-in-box used as a large-sized liquid container for business use, for example, an additive-free low-density polyethylene (hereinafter abbreviated as LDPE) is used as the innermost layer, and an additive-free high-density polyethylene is provided outside thereof. A type in which two layers of a three-layer coextrusion film having LDPE (hereinafter abbreviated as HDPE) as an intermediate layer and LDPE arranged on both sides thereof are being studied is being studied. Specifically, as an inner bag film for a capacity of 20 liters, for example, (wetted side) L
DPE (60μ thickness) + LDPE (40μ thickness) / HDPE
(40μ thickness) / LDPE (40μ thickness) + LDPE (40
μ thickness) / HDPE (40 μ thickness) / LDPE (40 μ thickness)
(Paper box side). However, in this layer structure, especially when the top seal or the bottom seal is first dropped on the falling surface, which is called the bottom drop, the side provided in parallel with the flow direction of the film in the inner bag The seal part broke, causing an accident such as liquid leakage.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、牛乳やクリ
ームのような乳製品を収納する無添加ポリエチレンを使
用したバッグインボックス用内袋に関する上記のような
問題点を除去するためになされたもので、特に落下衝撃
性にすぐれたバッグインボックス用内袋を提供すること
を目的とする。SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned problems associated with an inner bag for a bag-in-box that uses additive-free polyethylene for storing dairy products such as milk and cream. An object of the present invention is to provide an inner bag for a bag-in-box, which is particularly excellent in drop impact resistance.
【０００５】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するために、まず第１の発明では、内層、中間層、外層
より成るバッグインボックス用の内袋において、内層に
横方向の端面にフィルム断面の表れないチューブ状フィ
ルムを、中間層及び外層にシート状フィルムをそれぞれ
用いたことを特徴とするバッグインボックス用内袋を提
供するものである。In order to achieve the above object, the present invention firstly provides, in the first invention, an inner bag for a bag-in-box, which comprises an inner layer, an intermediate layer and an outer layer. The present invention provides an inner bag for a bag-in-box, characterized in that a tubular film having no film cross section is used, and a sheet-like film is used as an intermediate layer and an outer layer.
【０００６】また、第２の発明では、第１の発明におい
て、前記チューブ状フィルムを内層とし、その両側に前
記シート状フィルムである３層共押し出しフィルムを中
間層及び外層として配して、四方をシールして内袋とす
るバッグインボックス用内袋において、前記チューブ状
フィルムにあっては、左右両サイドのシールは行わず、
上部と下部のシールのみを行い、前記シート状フィルム
にあっては、左右両サイドのシールと共に、上部と下部
のシールを行うことを特徴とするバッグインボックス用
内袋を提供するものである。According to a second aspect of the present invention, in the first aspect of the present invention, the tubular film is used as an inner layer, and the three-layer coextrusion film, which is the sheet film, is arranged on both sides thereof as an intermediate layer and an outer layer. In the inner bag for bag-in-box to seal the inner bag, in the tubular film, the left and right sides are not sealed,
The present invention provides an inner bag for a bag-in-box, which is characterized in that only the upper and lower parts are sealed and, in the case of the sheet-shaped film, the upper and lower parts are sealed together with the left and right side seals.
【０００７】さらにまた、第３の発明では、第１および
第２の発明において、前記チューブ状フィルムとして無
添加低密度ポリエチレンを、前記シート状フィルムとし
て無添加高密度ポリエチレンを中間層としてこの両側に
無添加低密度ポリエチレンを配した３層共押し出しフィ
ルムを、それぞれ用いたことを特徴とするバッグインボ
ックス用内袋を提供するものである。Furthermore, in the third invention, in the first and second inventions, undoped low-density polyethylene is used as the tubular film, and undoped high-density polyethylene is used as the sheet film as an intermediate layer on both sides. It is intended to provide an inner bag for a bag-in-box, which is characterized by using a three-layer coextruded film in which additive-free low-density polyethylene is arranged.
【０００８】[0008]
【作用】上記のように本発明によれば、バッグインボッ
クス用の内袋として内層にチューブ状のフィルムを用い
たので内層のサイドシールは不要になり、かつ、ボトム
落下強度が向上する。また、内層の横幅は中間層、外層
の横幅よりも狭くて良いので、樹脂の使用量が少なくて
済む。さらに、内層、中間層、外層とも無添加ポリエチ
レン樹脂を使用しているので内容物が乳製品の場合にも
適応できる。As described above, according to the present invention, since the tubular film is used for the inner layer as the inner bag for the bag-in-box, the side layer of the inner layer is not necessary and the bottom drop strength is improved. Further, the width of the inner layer may be narrower than the widths of the middle layer and the outer layer, so that the amount of resin used can be small. Furthermore, since the additive-free polyethylene resin is used for the inner layer, the intermediate layer, and the outer layer, it can be applied even when the content is a dairy product.
【０００９】[0009]
【実施例】以下実施例により本発明を詳細に説明する。
先ず、密度 ０．９２１ｇ／ｃｍ3 、ＭＦＲ ０．３の
無添加ＬＤＰＥ樹脂と、密度 ０．９５８ｇ／ｃｍ3 、
ＭＦＲ ０．７の無添加ＨＤＰＥ樹脂を用意する。The present invention will be described in detail with reference to the following examples.
First, an additive-free LDPE resin having a density of 0.921 g / cm 3 and an MFR of 0.3 and a density of 0.958 g / cm 3 ,
An additive-free HDPE resin having MFR 0.7 is prepared.
【００１０】三層構成の内袋に用いるフィルムとして
は、以下の構成のものとした。すなわち、図１に示すよ
うに、内層（１１）は、前記無添加ＬＤＰＥ樹脂をイン
フレーション法により押し出したチューブを押しつぶし
た状態で巻き取り作製する。中間層（１２）及び外層
（１３）は、前記無添加ＨＤＰＥ樹脂を中間層とし、こ
の両側に前記無添加ＬＤＰＥ樹脂を配した３層共押し出
しフィルムをシート状で巻き取り作製する。なお、図１
（ａ）において矢印の方向は、フィルムの流れ方向を示
す。The film used for the inner bag having the three-layer structure has the following structure. That is, as shown in FIG. 1, the inner layer (11) is manufactured by winding a tube obtained by extruding the undoped LDPE resin by an inflation method in a crushed state. The intermediate layer (12) and the outer layer (13) are prepared by winding the above additive-free HDPE resin as an intermediate layer, and winding a three-layer coextrusion film having the above-mentioned additive-free LDPE resin on both sides in a sheet form. FIG.
The direction of the arrow in (a) shows the flow direction of the film.
【００１１】この内袋フィルムの製袋は次のようにして
行う。すなわち、規定幅のチューブ状フィルムの巻き取
りを内層（１１）とし、この両側にチューブ状フィルム
の幅より若干広幅にした同じく規定幅の中間層（１
２）、外層（１３）のシート状フィルムを重ねて配して
片側三層構成の連続した積層体とし、この積層体の流れ
方向と平行なサイド方向のシールは、チューブ状フィル
ムの折り曲げ線（２１、２２）の近傍で、この折り曲げ
線（２１、２２）の外側にシール（２３、２４）を行い
内袋のサイドシールが完了する。つまり、内層であるチ
ューブ状フィルムはサイドシールが行われず、中間層、
外層であるシート状フィルムにのみサイドシールが行わ
れた積層体の巻き取りができる。ついで、この積層体の
巻き取りを、積層体の流れとは垂直方向のシール例えば
ボトムシール（２６）を行うと殆ど同時にボトムシール
と平行な横方向の断裁を行い、三方がシールされた内袋
が作製される。つぎに、三方がシールされたこの内袋の
片面に、口栓（３１）を装着するための開口孔（２７）
をパンチ等で開口し、口栓のフランジ部（３２）を開口
孔（２７）からこの内袋の内部に入れ、内袋の内面とフ
ランジ部を超音波シール等の方法で熱融着させて、口栓
（３１）を開口孔（２７）に突設させ、口栓付きの内袋
ができる。最後にトップシール（２５）を行い、図１
（ａ）、（ｂ）、（ｃ）に示すようなバッグインボック
ス用の内袋が完成する。Bag-making of this inner bag film is performed as follows. That is, the inner layer (11) is formed by winding the tubular film having the specified width, and the intermediate layer (1) having the specified width slightly wider than the width of the tubular film is formed on both sides of the inner layer (11).
2), the sheet-like films of the outer layer (13) are stacked and arranged to form a continuous laminated body having a three-layer structure on one side, and the seal in the side direction parallel to the flow direction of the laminated body is formed by bending the bending line of the tubular film ( In the vicinity of (21, 22), a seal (23, 24) is provided on the outside of the folding line (21, 22) to complete the side sealing of the inner bag. That is, the tubular film which is the inner layer is not side-sealed, and the intermediate layer,
It is possible to wind up the laminate in which the side seal is applied only to the sheet-like film which is the outer layer. Then, when the laminated body is wound up, a seal perpendicular to the flow of the laminated body, for example, a bottom seal (26) is performed, and at the same time, a transverse cutting parallel to the bottom seal is performed, and three sides are sealed. Is created. Next, an opening hole (27) for mounting a mouth plug (31) on one side of this inner bag with three sides sealed.
By punching, the flange portion (32) of the stopper is put into the inner bag through the opening hole (27), and the inner surface of the inner bag and the flange portion are heat-sealed by a method such as ultrasonic sealing. By making the mouth plug (31) project from the opening hole (27), an inner bag with a mouth plug is formed. Finally, apply the top seal (25) and
The inner bag for the bag-in-box as shown in (a), (b) and (c) is completed.
【００１２】〈実施例１〉容量２０リットルのバッグイ
ンボックス用内袋をつぎの方法により作製する。 １）内袋用フィルムの作製。 先ず、密度 ０．９２１ｇ／ｃｍ3 、ＭＦＲ ０．３の
無添加ＬＤＰＥ樹脂をインフレーション法により環状口
金より押し出したチューブを押しつぶし厚み６０ｍμ、
直径５００ｍｍのチューブ状フィルムを作製し、内層
（１１）とする。ついで、密度 ０．９５８ｇ／ｃ
ｍ3 、ＭＦＲ ０．７の無添加ＨＤＰＥ樹脂を中間層と
し、この両側に内層（１１）に用いたものと同じ無添加
ＬＤＰＥ樹脂を配した、厚み各層とも４０ｍμ、幅５５
６ｍｍの３層共押し出しフィルムを作製し、中間層（１
２）と外層（１３）とする。すなわち、ＬＤＰＥ（４０
ｍμ）／ＨＤＰＥ（４０ｍμ）／ＬＤＰＥ（４０ｍμ）
である。<Example 1> An inner bag for a bag-in-box having a capacity of 20 liters is manufactured by the following method. 1) Production of film for inner bag. First, a tube in which an additive-free LDPE resin having a density of 0.921 g / cm 3 and MFR 0.3 was extruded from an annular die by an inflation method was crushed to have a thickness of 60 mμ.
A tubular film having a diameter of 500 mm is produced and used as the inner layer (11). Then, the density is 0.958g / c
m 3, the additive-free HDPE resin MFR 0.7 as an intermediate layer, arranged the same additive-free LDPE resin as used in the inner layer (11) on both sides thereof, each layer thickness 40Emumyu, width 55
A 3-mm coextrusion film of 6 mm was prepared, and the intermediate layer (1
2) and the outer layer (13). That is, LDPE (40
mμ) / HDPE (40 mμ) / LDPE (40 mμ)
Is.
【００１３】２）内袋の作製。 厚み６０ｍμ、直径５００ｍｍのチューブ状フィルムの
巻き取りを内層（１１）とし、この両側に中間層（１
２）、外層（１３）となる幅５５６ｍｍの３層共押し出
しフィルムの巻き取りを重ねて配して繰り出し、片側三
層構成の積層体を作製する。従って、この積層体の材質
構成はつぎのようになる。 （接液側）ＬＤＰＥ（６０ｍμ）＋ＬＤＰＥ（４０ｍ
μ）／ＨＤＰＥ（４０ｍμ）／ＬＤＰＥ（４０ｍμ）＋
ＬＤＰＥ（４０ｍμ）／ＨＤＰＥ（４０ｍμ）／ＬＤＰ
Ｅ（４０ｍμ）（紙箱側）。 積層体の流れ方向と平行なサイド面のシールは、内層
（１１）であるチューブ状フィルムの折り曲げ線（２
１、２２）の外側に行い、サイドシール（２３、２４）
が行われた積層体の巻き取りができる。ついでこの積層
体の巻き取りに、積層体の流れ方向と垂直にボトムシー
ル（２６）を行うと同時に長さ６２０ｍｍに断裁し、外
径 ５５６ｍｍ（横方向）×６２０ｍｍ（フィルムの流
れ方向）の三方がシールされた内袋が作製される。つぎ
に、三方がシールされたこの内袋の片面に、口栓（３
１）を装着するための開口孔（２７）をパンチ等で開口
し、口栓のフランジ部（３２）を開口孔（２７）からこ
の内袋の内部に入れ、内袋の内面とフランジ部を超音波
シール等の方法で熱融着させて、口栓（３１）を開口孔
（２７）に突設させ、口栓付きの内袋ができる。最後に
トップシールを行い、外径 ５５６ｍｍ×（横方向）×
６２０ｍｍ（フィルムの流れ方向）、内径 ５００ｍｍ
（横方向）×５５０ｍｍ（フィルムの流れ方向）のバッ
グインボックス用の内袋が作製される。2) Preparation of inner bag. The inner layer (11) was formed by winding a tubular film having a thickness of 60 mμ and a diameter of 500 mm, and an intermediate layer (1
2), a three-layer coextrusion film having a width of 556 mm, which is the outer layer (13), is wound up and arranged to be fed out to produce a laminate having a three-layer structure on one side. Therefore, the material composition of this laminated body is as follows. (Wetted side) LDPE (60 mμ) + LDPE (40 m
μ) / HDPE (40 mμ) / LDPE (40 mμ) +
LDPE (40mμ) / HDPE (40mμ) / LDP
E (40 mμ) (paper box side). The seal on the side surface parallel to the flow direction of the laminated body is formed by bending lines (2) of the tubular film which is the inner layer (11).
Outside of 1, 22) and side seals (23, 24)
The laminated body can be wound up. Then, for the winding of this laminated body, a bottom seal (26) is formed perpendicularly to the flow direction of the laminated body, and at the same time, it is cut into a length of 620 mm and has an outer diameter of 556 mm (lateral direction) x 620 mm (film flowing direction). An inner bag in which is sealed is produced. Next, on one side of this inner bag with three sides sealed,
The opening hole (27) for mounting 1) is opened with a punch or the like, and the flange portion (32) of the spout is put into the inside of the inner bag through the opening hole (27) so that the inner surface of the inner bag and the flange portion are It is heat-sealed by a method such as ultrasonic sealing and the mouth plug (31) is projected into the opening hole (27) to form an inner bag with a mouth plug. Finally, a top seal is applied and the outer diameter is 556 mm × (lateral direction) ×
620 mm (flow direction of film), inner diameter 500 mm
An inner bag for a bag-in-box of (horizontal direction) × 550 mm (flow direction of film) is produced.
【００１４】こうして作製した内袋の落下衝撃強度を、
以下に述べる試験方法に基づいて行い、その結果を表１
に示した。 試験方法：２０リットルの水（水温５°Ｃ）を充填した
内袋を、平滑なコンクリート床面に、ボトム落下（上下
方向）、サイド落下（左右方向）、水平落下（水平方
向）の３条件毎に、ボトム落下とサイド落下は２５ｃｍ
の高さから、水平落下は５０ｃｍの高さから、それぞれ
繰り返し落として内袋が破袋するまでの回数を求め、 ○：３回以上破袋しない。 △：２回の落下で破袋する。 ×：１回の落下で破袋する。 とした。The drop impact strength of the inner bag thus produced is
Based on the test method described below, the results are shown in Table 1.
It was shown to. Test method: Three conditions: an inner bag filled with 20 liters of water (water temperature 5 ° C), bottom drop (vertical direction), side drop (horizontal direction), horizontal drop (horizontal direction) on a smooth concrete floor surface. 25 cm for bottom and side drops
The number of horizontal drops from the height of 50 cm until the inner bag broke repeatedly was found from the height of 50 cm, and the bag was not broke three times or more. Δ: The bag is broken by dropping twice. ×: The bag is broken by one drop. And
【００１５】〈比較例１〉内層（１１）として、実施例
１と同じ樹脂を用いて、インフレーション法により作製
した厚み６０ｍμ、横幅５５６ｍｍのＬＤＰＥフィルム
を準備する。中間層（１２）と外層（１３）は、実施例
１と同じものを準備する。すなわち、横幅５５６ｍｍの
ＬＤＰＥ（４０ｍμ）／ＨＤＰＥ（４０ｍμ）／ＬＤＰ
Ｅ（４０ｍμ）からなる３層共押し出しフィルムであ
る。実施例１と同様の方法で、（接液側）ＬＤＰＥ（６
０ｍμ）＋ＬＤＰＥ（４０ｍμ）／ＨＤＰＥ（４０ｍ
μ）／ＬＤＰＥ（４０ｍμ）＋ＬＤＰＥ（４０ｍμ）／
ＨＤＰＥ（４０ｍμ）／ＬＤＰＥ（４０ｍμ）（紙箱
側）の片側三層構成の積層体を作製し、この積層体を用
いて図２（ａ）、（ｂ）、（ｃ）に示すような、四方を
ヒートシール等の方法により外径 ５５６ｍｍ（横方
向）×６２０ｍｍ（フィルムの流れ方向）、内径 ５０
０ｍｍ（横方向）×５５０ｍｍ（フィルムの流れ方向）
の内袋を作製する。内容物を出し入れするための口栓が
装着されていることは実施例１と同様である。なお、図
２（ａ）において矢印の方向は、フィルムの流れ方向を
示す。こうして作製した内袋の落下衝撃強度を、実施例
１と同じ試験方法で求めた。その結果を表１に示す。<Comparative Example 1> As the inner layer (11), using the same resin as in Example 1, an LDPE film having a thickness of 60 mμ and a width of 556 mm prepared by an inflation method is prepared. The same middle layer (12) and outer layer (13) as in Example 1 are prepared. That is, LDPE (40 mμ) / HDPE (40 mμ) / LDP with a width of 556 mm
It is a three-layer coextrusion film made of E (40 mμ). In the same manner as in Example 1, (the liquid contact side) LDPE (6
0mμ) + LDPE (40mμ) / HDPE (40m
μ) / LDPE (40mμ) + LDPE (40mμ) /
A HDPE (40 mμ) / LDPE (40 mμ) (paper box side) single-sided three-layer structure laminate was prepared, and this laminate was used to form a square as shown in FIGS. 2 (a), (b), and (c). The outer diameter is 556 mm (transverse direction) x 620 mm (film flow direction) and the inner diameter is 50 by a method such as heat sealing.
0 mm (transverse direction) x 550 mm (film flow direction)
Make an inner bag. As in the first embodiment, a spout for loading and unloading the contents is attached. In addition, the direction of the arrow in FIG. 2A indicates the flow direction of the film. The drop impact strength of the inner bag thus produced was determined by the same test method as in Example 1. Table 1 shows the results.
【００１６】[0016]
【表１】 [Table 1]
【００１７】表１から考察すると、比較例におけるボト
ム落下は、サイドシールがフィルムの流れ方向に平行な
ため引き裂き強度が弱くエッジが切れやすい。従ってボ
トム落下時、サイドシールのエッジ切れが発生し、落下
衝撃強度が弱い。実施例においては、エッジ切れのし易
い流れ方向のサイドシールが、内層に存在しないように
工夫したので、ボトム落下の落下衝撃強度は、サイド落
下、水平落下の落下衝撃強度と同じ程度まで向上した。Considering from Table 1, in the bottom drop in the comparative example, the side seal is parallel to the flow direction of the film, the tear strength is weak and the edge is easily cut. Therefore, when the bottom is dropped, the edge of the side seal is broken, and the drop impact strength is weak. In the examples, the side seals in the flow direction, which easily cause edge breakage, were devised so as not to exist in the inner layer, so the drop impact strength of the bottom drop was improved to the same extent as the drop impact strength of the side drop and the horizontal drop. .
【００１８】[0018]
【発明の効果】上記のように本発明によれば、内層にチ
ューブ状フィルムを用いるので、内層のサイドシールは
不要になり、落下衝撃強度が向上する。内層の横幅が、
中間層、外層の横幅より狭くてよいので、樹脂の節減効
果がある。As described above, according to the present invention, since the tubular film is used as the inner layer, the side seal of the inner layer is not necessary and the drop impact strength is improved. The width of the inner layer is
Since the width may be narrower than the width of the middle layer and the outer layer, there is a resin saving effect.
【図１】（ａ）本発明の一実施例を示す説明図である。 （ｂ）同実施例のＡーＡ断面図である。 （ｃ）同実施例のＢーＢ断面図である（口栓を装着した
状態）。FIG. 1A is an explanatory view showing an embodiment of the present invention. (B) It is an AA sectional view of the embodiment. (C) It is a BB cross-sectional view of the same example (a state in which a mouth plug is attached).
【図２】（ａ）従来例を示す説明図である。 （ｂ）同実施例のＡーＡ断面図である。 （ｃ）同実施例のＢーＢ断面図である（口栓を装着した
状態）。FIG. 2A is an explanatory diagram showing a conventional example. (B) It is an AA sectional view of the embodiment. (C) It is a BB cross-sectional view of the same example (a state in which a mouth plug is attached).
１１‥‥内層 １２‥‥中間層 １３‥‥外層 ２１‥‥折り曲げ線 ２２‥‥折り曲げ線 ２３‥‥シール（サイド） ２４‥‥シール（サイド） ２５‥‥シール（トップ） ２６‥‥シール（ボトム） ２７‥‥開口孔 ３１‥‥口栓 ３２‥‥フランジ部 11: Inner layer 12: Middle layer 13: Outer layer 21: Bending line 22: Bending line 23: Seal (side) 24 ... Seal (side) 25 ... Seal (top) 26 ... Seal (bottom) ) 27: Opening hole 31: Mouth plug 32: Flange part
Claims (3)
ックス用の内袋において、 内層に横方向の端面にフィルム断面の表れないチューブ
状フィルムを、中間層及び外層にシート状フィルムをそ
れぞれ用いたことを特徴とするバッグインボックス用内
袋。1. An inner bag for a bag-in-box comprising an inner layer, an intermediate layer and an outer layer, wherein the inner layer is a tubular film having no film cross-section on the lateral end face and the intermediate layer and the outer layer are sheet films. The inner bag for the bag-in-box which is characterized by
両側に前記シート状フィルムである３層共押し出しフィ
ルムを中間層及び外層として配して、四方をシールして
内袋とするバッグインボックス用内袋において、 前記チューブ状フィルムにあっては、左右両サイドのシ
ールは行わず、上部と下部のシールのみを行い、 前記シート状フィルムにあっては、左右両サイドのシー
ルと共に、上部と下部のシールを行うことを特徴とする
バッグインボックス用内袋。2. A bag-in-box in which the tubular film is used as an inner layer, and the three-layer coextrusion film, which is the sheet film, is arranged on both sides thereof as an intermediate layer and an outer layer, and the four sides are sealed to form an inner bag. In the inner bag, the tube-shaped film does not seal the left and right sides but only the upper and lower sides, and the sheet-shaped film has both the left and right sides and the upper and lower sides. An inner bag for bag-in-box, which is characterized by performing the sealing of.
度ポリエチレンを、前記シート状フィルムとして無添加
高密度ポリエチレンを中間層としてこの両側に無添加低
密度ポリエチレンを配した３層共押し出しフィルムを、
それぞれ用いたことを特徴とする請求項１に記載のバッ
グインボックス用内袋。3. A three-layer coextruded film in which additive-free low-density polyethylene is used as the tubular film, additive-free high-density polyethylene is used as the sheet-like film, and additive-free low-density polyethylene is disposed on both sides of the intermediate layer,
The inner bag for bag-in-box according to claim 1, which is used respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7110457A JPH08301296A (en) | 1995-05-09 | 1995-05-09 | Inner bag for bag-in box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7110457A JPH08301296A (en) | 1995-05-09 | 1995-05-09 | Inner bag for bag-in box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08301296A true JPH08301296A (en) | 1996-11-19 |
Family
ID=14536200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7110457A Pending JPH08301296A (en) | 1995-05-09 | 1995-05-09 | Inner bag for bag-in box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08301296A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003097472A1 (en) | 2002-05-15 | 2003-11-27 | Kyoraku Co., Ltd. | Multi-bag and method of producing the same, and multi-bag for bag making and filling |
| JP2008007154A (en) * | 2006-06-28 | 2008-01-17 | Tokyo Ohka Kogyo Co Ltd | Packaging bag with spout |
-
1995
- 1995-05-09 JP JP7110457A patent/JPH08301296A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003097472A1 (en) | 2002-05-15 | 2003-11-27 | Kyoraku Co., Ltd. | Multi-bag and method of producing the same, and multi-bag for bag making and filling |
| JP2008007154A (en) * | 2006-06-28 | 2008-01-17 | Tokyo Ohka Kogyo Co Ltd | Packaging bag with spout |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4041851A (en) | Method for making plastic bags | |
| US10597195B2 (en) | Methods of making gusseted flexible package with shaped sides | |
| US2998340A (en) | Bags | |
| CN100572207C (en) | Form pillow packs bag, pillow type packaging body, the heat seal bar that is used for pillow type packing machine and pillow type packing machine | |
| EP0528721A2 (en) | Reclosable plastic bags and method of making same utilizing discontinuous zipper strip | |
| MXPA04009147A (en) | Standup bag and method of manufacturing same. | |
| US20100172600A1 (en) | Flexible container and method of making the same | |
| JP2004516143A (en) | Manufacturing method and manufacturing apparatus for packaging material | |
| US6884206B2 (en) | Method of producing a packaging material | |
| JPS6215412B2 (en) | ||
| WO2003097472A1 (en) | Multi-bag and method of producing the same, and multi-bag for bag making and filling | |
| US3054551A (en) | Fluid impervious containers | |
| JP5983917B2 (en) | Packaging bag with spout | |
| JPH08301296A (en) | Inner bag for bag-in box | |
| US10661961B2 (en) | Vacuum package with reclosable pour spout and handle, and methods of making the same | |
| JP3660006B2 (en) | Packaging container | |
| JP2000142720A (en) | Soft packaging container with ribs | |
| JP3124658B2 (en) | Connected body of bag for milk bag-in-box | |
| JP3256600B2 (en) | Packaging container opening device | |
| GB2116950A (en) | Liquid packaging containers | |
| JP3209473B2 (en) | Aseptic bag for beverages Bag for in-box | |
| JP3199958B2 (en) | Milk bag | |
| JPWO2013141355A1 (en) | Composite container, package and composite container manufacturing method | |
| JP3199943B2 (en) | Beverage bag-in-box bag | |
| JPH1191044A (en) | Easily tearable packaging bag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20040329 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040413 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040810 |