JP2008114871A - Packaging paper container and container manufacturing apparatus - Google Patents

Packaging paper container and container manufacturing apparatus Download PDF

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JP2008114871A
JP2008114871A JP2006298321A JP2006298321A JP2008114871A JP 2008114871 A JP2008114871 A JP 2008114871A JP 2006298321 A JP2006298321 A JP 2006298321A JP 2006298321 A JP2006298321 A JP 2006298321A JP 2008114871 A JP2008114871 A JP 2008114871A
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tape
spout
container
layer
pull tab
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Takeshi Baba
Masamichi Kaneko
Daisuke Sagawa
Masayuki Taniguchi
大輔 佐川
将幸 谷口
正道 金子
毅 馬場
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Nihon Tetra Pak Kk
日本テトラパック株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging paper container and a container manufacturing apparatus which allow an inner tape to be cut according to the design of the tape at the time of drinking the contents of the container to eliminate such inconvenience as the tape's remaining on the edge of a spout and prevent damage to the gas barrier functionality of the inner tape. <P>SOLUTION: The container manufacturing apparatus manufactures the packaging paper container that is made of a paper laminated packaging material and includes the inner tape 6 covering the spout and a pull-tab 4 sealing the spout. The manufacturing apparatus has a laser beam emitting means 8 which emits a laser beam 9 onto the inner tape 6, which is composed of both outer layers made of a low-density polyethylene and an intermediate layer made of an ethylene-vinylalcohol copolymer. The manufacturing apparatus forms a mechanical weakened point or/and a line 10 selectively on the intermediate layer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、飲料などを充填する包装紙容器及び容器製造装置に関する。 The present invention relates to a wrapping paper container and a container manufacturing apparatus for filling beverages and the like.

牛乳、ジュース、ミネラルウォーターなどの飲料を収容する包装紙容器は、例えば、折目線が付けられ、外観デザインが印刷されたウェブ状包装積層材料から得られる。
積層包装材料は、内側から順に熱可塑性材料層(ポリエチレン樹脂層)、アルミ箔層、紙層(繊維質基材)、及びポリエチレン樹脂層を有する。

包装紙容器を製造するために、例えば、ウェブ状の包装積層材料を長手方向の縦シールによりチューブ状に先ず成形する。 In order to manufacture a wrapping paper container, for example, a web-shaped wrapping laminated material is first formed into a tube shape by a vertical seal in the longitudinal direction. チューブ状包装材料内に液体食品を充填する。 Fill the tubular packaging material with liquid food. チューブ状包装材料を横断方向に横シールして切断する。 The tubular packaging material is cross-sealed and cut in the transverse direction. 折目線に沿って折畳んで最終形状に成形する。 Fold it along the crease line to form the final shape. その最終形状には、ブリック状、8角柱状、正四面体形状などがある。 The final shape includes a brick shape, an octagonal columnar shape, and a regular tetrahedron shape. A wrapping paper container that contains beverages such as milk, juice, mineral water, and the like is obtained from, for example, a web-like packaging laminate material that is creased and printed with an external design. A wrapping paper container that contains beverages such as milk, juice, mineral water, and the like is obtained from, for example, a web-like packaging laminate material that is creased and printed with an external design.
The laminated packaging material has a thermoplastic material layer (polyethylene resin layer), an aluminum foil layer, a paper layer (fibrous substrate), and a polyethylene resin layer in order from the inside. The laminated packaging material has a thermoplastic material layer (polyethylene resin layer), an aluminum foil layer, a paper layer (fibrous substrate), and a polyethylene resin layer in order from the inside.
In order to manufacture a wrapping paper container, for example, a web-shaped packaging laminate material is first formed into a tube shape by longitudinal sealing in the longitudinal direction. Fill the tube-shaped packaging material with liquid food. Cut the tubular packaging material by transverse sealing in the transverse direction. Fold along the crease line to form the final shape. The final shape includes a brick shape, an octagonal prism shape, and a regular tetrahedron shape. In order to manufacture a wrapping paper container, for example, a web-shaped packaging laminate material is first formed into a tube shape by longitudinal sealing in the longitudinal direction. Fill the tube-shaped packaging material with liquid food. Cut the tubular packaging material By transverse sealing in the transverse direction. Fold along the crease line to form the final shape. The final shape includes a brick shape, an octagonal prism shape, and a regular tetrahedron shape.

通常、上記の容器製造工程では、その上壁面に注出口を形成し、注出口にプルタブを貼着する。飲用時には、プルタブを引き剥がして注出口を開封開口する。
図5に、紙容器例の上部部分図を示す。 FIG. 5 shows an upper partial view of an example of a paper container. 注出口2にプルタブ4が貼着された容器1は、容器内にジュースや牛乳などの液体食品を収容する。 The container 1 to which the pull tab 4 is attached to the spout 2 stores liquid foods such as juice and milk in the container. 容器の製造において、その上壁面3に、小型のパンチ孔から成る注出口2が形成される。 In the manufacture of a container, a spout 2 composed of a small punch hole is formed on the upper wall surface 3. 注出口を内側からインナーテープ(図示せず)が、外側からプルタブ4が、注出口2を密封する。 An inner tape (not shown) seals the spout from the inside, and a pull tab 4 seals the spout 2 from the outside. この時、インナーテープとプルタブとが融着する。 At this time, the inner tape and the pull tab are fused. インナーテープは、ポリエチレン、ポリ塩化ビニリデン及びポリエチレンなどを積層して形成される。 The inner tape is formed by laminating polyethylene, polyvinylidene chloride, polyethylene, or the like. プルタブは、アルミニウムフィルムで形成され、一方の面にポリエチレン樹脂層が被覆される。 The pull tab is made of an aluminum film and one side is coated with a polyethylene resin layer.
液体食品を飲用する場合に、プルタブのつまみ5を引き剥がすと、インナーテープがプルタブと融着された部分からプルタブ4、5によって破られ、注出口2を開放する。 When the knob 5 of the pull tab is peeled off when drinking liquid food, the inner tape is torn by the pull tabs 4 and 5 from the portion fused with the pull tab, and the spout 2 is opened. Usually, in said container manufacturing process, a spout is formed in the upper wall surface, and a pull tab is stuck to a spout. At the time of drinking, the pull tab is peeled off to open the spout. Usually, in said container manufacturing process, a spout is formed in the upper wall surface, and a pull tab is stuck to a spout. At the time of drinking, the pull tab is peeled off to open the spout.
FIG. 5 shows a partial top view of an example paper container. The container 1 having the pull tab 4 attached to the spout 2 accommodates liquid food such as juice or milk in the container. In the production of the container, a spout 2 composed of a small punch hole is formed on the upper wall surface 3 thereof. An inner tape (not shown) from the inside of the spout and a pull tab 4 from the outside seal the spout 2. At this time, the inner tape and the pull tab are fused. The inner tape is formed by laminating polyethylene, polyvinylidene chloride, polyethylene, and the like. The pull tab is formed of an aluminum film, and one surface is covered with a polyethylene resin layer. FIG. 5 shows a partial top view of an example paper container. The container 1 having the pull tab 4 attached to the spout 2 accommodates liquid food such as juice or milk in the container. In the production of the container, a spout 2 composed Of a small punch hole is formed on the upper wall surface 3 thereof. An inner tape (not shown) from the inside of the spout and a pull tab 4 from the outside seal the spout 2. At this time, the inner tape and the The pull tab is formed of an aluminum film, and one surface is covered with a polyethylene resin layer. The inner tape is formed by laminating polyethylene, conductedidene chloride, polyethylene, and the like.
When drinking the liquid food, if the tab 5 of the pull tab is peeled off, the inner tape is broken by the pull tabs 4 and 5 from the portion fused with the pull tab, and the spout 2 is opened. When drinking the liquid food, if the tab 5 of the pull tab is peeled off, the inner tape is broken by the pull tabs 4 and 5 from the portion fused with the pull tab, and the spout 2 is opened.

包装紙容器製造装置では、プルタブが貼着される前に、ウェブ状の包装積層材料に注出口が形成され、インナーテープが包装材料にヒートシールされる。
図3に示すプルタブ貼着装置43には、表面がフッ素樹脂で形成されたカウンタドーリー43aと、カウンタドーリーに対して上下動自在に配設されたプルタブシールヒータ43bが設けられている。プルタブシールヒータ43bを移動させ、カウンタドーリー43aとの間にインナーテープ6、積層包装材料7及びプルタブ4を挟持する。
In the wrapping paper container manufacturing apparatus, before the pull tab is attached, a spout is formed in the web-shaped packaging laminate material, and the inner tape is heat sealed to the packaging material.
The pull tab sticking device 43 shown in FIG. 3 is provided with a counter dolly 43a whose surface is made of a fluororesin, and a pull tab seal heater 43b that is arranged to be movable up and down with respect to the counter dolly. The pull tab seal heater 43b is moved, and the inner tape 6, the laminated packaging material 7, and the pull tab 4 are sandwiched between the counter dolly 43a. The pull tab sticking device 43 shown in FIG. 3 is provided with a counter dolly 43a whose surface is made of a fluororesin, and a pull tab seal heater 43b that is arranged to be movable up and down with respect to the counter dolly. The pull tab seal heater 43b is moved, and the inner tape 6, the laminated packaging material 7, and the pull tab 4 are sandwiched between the counter dolly 43a.

この構成の容器製造装置において、カウンタドーリー43aにプルタブシールヒータ43bが近接させられ、インナーテープ6、積層包装材料7及びプルタブ4を押圧し、プルタブシールヒータ43bで加熱することによって、インナーテープ6及び積層包装材料7間、積層包装材料7及びプルタブ7間をヒートシールして、包装紙容器を得る。
特開平02−152609号公報
この構成の容器製造装置において、カウンタドーリー43aにプルタブシールヒータ43bが近接させられ、インナーテープ6、積層包装材料7及びプルタブ4を押圧し、プルタブシールヒータ43bで加熱することによって、インナーテープ6及び積層包装材料7間、積層包装材料7及びプルタブ7間をヒートシールして、包装紙容器を得る。
特開平02−152609号公報
In the container manufacturing apparatus having this configuration, the pull tab seal heater 43b is brought close to the counter dolly 43a, and the inner tape 6, the laminated packaging material 7 and the pull tab 4 are pressed and heated by the pull tab seal heater 43b. Heat sealing is performed between the laminated packaging materials 7 and between the laminated packaging material 7 and the pull tab 7 to obtain a packaging paper container. In the container manufacturing apparatus having this configuration, the pull tab seal heater 43b is brought close to the counter dolly 43a, and the inner tape 6, the laminated packaging material 7 and the pull tab 4 are pressed and heated by the pull tab seal heater 43b. Heat sealing is performed between the laminated packaging materials 7 and between the laminated packaging materials 7 and the pull tab 7 to obtain a packaging paper container.
Japanese Patent Laid-Open No. 02-152609 Japanese Patent Laid-Open No. 02-152609

しかしながら、従来の包装容器製造装置で得られた包装容器では、飲用時にプルタブを引き上げ注出口を開封する際に、インナーテープが設計されたように切断されず、注出口の縁辺に残留するなどの不都合がある。
これに対して、インナーテープに半切れ線、ミシン目などの弱め線を設けることが提案されている。 On the other hand, it has been proposed to provide a weak line such as a half-cut line or a perforation on the inner tape. しかしながら、これらの弱め線の形成により、インナーテープのガスバリア性が損なわれる恐れがある。 However, the formation of these weakening lines may impair the gas barrier property of the inner tape. However, in a packaging container obtained by a conventional packaging container manufacturing apparatus, when pulling up a pull tab at the time of drinking and opening a spout, the inner tape is not cut as designed and remains on the edge of the spout, etc. There is an inconvenience. However, in a packaging container obtained by a conventional packaging container manufacturing apparatus, when pulling up a pull tab at the time of drinking and opening a spout, the inner tape is not cut as designed and remains on the edge of the spout, etc. There is an inconvenience.
On the other hand, it has been proposed to provide weak lines such as half-cut lines and perforations on the inner tape. However, the formation of these weak lines may impair the gas barrier properties of the inner tape. On the other hand, it has been proposed to provide weak lines such as half-cut lines and perforations on the inner tape. However, the formation of these weak lines may impair the gas barrier properties of the inner tape.

本発明の目的は、飲用時にインナーテープが設計通りに切断され、注出口の縁辺に残留するなどの不都合がなく、インナーテープのガスバリア性が損なわれない包装紙容器及び容器製造装置を提供することである。 An object of the present invention is to provide a wrapping paper container and a container manufacturing apparatus in which the inner tape is cut as designed at the time of drinking and there is no inconvenience such as remaining on the edge of the spout, and the gas barrier property of the inner tape is not impaired. It is.

本発明の包装紙容器は、内側樹脂層、紙層及び外側樹脂層を含む積層包装材料から成形され、注出口が形成され、注出口を覆い、内側樹脂層の内面にシールされたインナーテープと、外側樹脂層の外面及びインナーテープの外面にシールして注出口を密封するプルタブと、を有する包装紙容器であって、
インナーテープが低密度ポリエチレンの両外側層とエチレン−ビニルアルコール共重合体の中間層とからなり、注出口の少なくとも開封開始箇所及び/又はその近傍に、インナーテープ外部から照射されたレーザー光によって中間層に選択的に機械的脆弱点又は/及び線が形成されていることを特徴とする。 The inner tape consists of both outer layers of low-density polyethylene and an intermediate layer of ethylene-vinyl alcohol copolymer, and at least the opening start point and / or its vicinity of the spout is intermediate by laser light irradiated from the outside of the inner tape. It is characterized in that mechanical fragility points and / and lines are selectively formed in the layer. The wrapping paper container of the present invention is formed from a laminated packaging material including an inner resin layer, a paper layer, and an outer resin layer, and includes an inner tape formed with a spout, covering the spout, and sealed to the inner surface of the inner resin layer. A wrapping paper container having a pull tab that seals the outer surface of the outer resin layer and the outer surface of the inner tape to seal the spout, The wrapping paper container of the present invention is formed from a laminated packaging material including an inner resin layer, a paper layer, and an outer resin layer, and includes an inner tape formed with a spout, covering the spout, and sealed to the inner surface of the inner resin layer. A wrapping paper container having a pull tab that seals the outer surface of the outer resin layer and the outer surface of the inner tape to seal the spout,
The inner tape consists of both outer layers of low-density polyethylene and an intermediate layer of ethylene-vinyl alcohol copolymer, and is intermediated by laser light emitted from the outside of the inner tape at least at the opening start position and / or in the vicinity thereof. A mechanical weak point or / and a line are selectively formed in the layer. The inner tape consists of both outer layers of low-density polyethylene and an intermediate layer of ethylene-vinyl alcohol copolymer, and is intermediated by laser light emitted from the outside of the inner tape at least at the opening start position and / or in the nearly thereof. A mechanical weak point or / and a line are selectively formed in the layer.

この発明の容器製造装置は、内側樹脂層、紙層及び外側樹脂層を含む積層包装材料から成形され、注出口が形成され、注出口を覆い、内側樹脂層の内面にシールされたインナーテープと、外側樹脂層の外面及びインナーテープの外面にシールして注出口を密封するプルタブと、を有する包装紙容器の製造装置であって、
低密度ポリエチレンの両外側層とエチレン−ビニルアルコール共重合体の中間層とからなるインナーテープに、インナーテープ外部からレーザー光を照射するレーザー光照射手段を備え、中間層の注出口の少なくとも開封開始箇所及び/又はその近傍に、選択的に機械的脆弱点又は/及び線を形成することを特徴とする。 The inner tape composed of both outer layers of low-density polyethylene and the intermediate layer of ethylene-vinyl alcohol copolymer is provided with a laser light irradiation means for irradiating laser light from the outside of the inner tape, and at least the spout of the intermediate layer is opened. It is characterized by selectively forming mechanical fragility points and / or lines in and / or in the vicinity thereof. The container manufacturing apparatus according to the present invention includes an inner tape formed from a laminated packaging material including an inner resin layer, a paper layer, and an outer resin layer, a spout is formed, covers the spout, and is sealed to the inner surface of the inner resin layer. A wrapping paper container manufacturing apparatus having a pull tab that seals the outer surface of the outer resin layer and the outer surface of the inner tape to seal the spout, The container manufacturing apparatus according to the present invention includes an inner tape formed from a laminated packaging material including an inner resin layer, a paper layer, and an outer resin layer, a spout is formed, covers the spout, and is sealed to the inner surface of the inner resin layer. A wrapping paper container manufacturing apparatus having a pull tab that seals the outer surface of the outer resin layer and the outer surface of the inner tape to seal the spout,
The inner tape consisting of both outer layers of low-density polyethylene and the intermediate layer of ethylene-vinyl alcohol copolymer is equipped with laser light irradiation means for irradiating laser light from the outside of the inner tape, and at least opening the spout of the intermediate layer is started A mechanical weak point or / and a line are selectively formed in the location and / or the vicinity thereof. The inner tape consisting of both outer layers of low-density polyethylene and the intermediate layer of ethylene-vinyl alcohol copolymer is equipped with laser light irradiation means for irradiating laser light from the outside of the inner tape, and at least opening the spout of the intermediate layer is started A mechanical weak point or / and a line are selectively formed in the location and / or the vicinity thereof.

この発明による包装紙容器は、内側樹脂層、紙層及び外側樹脂層を含む積層包装材料から成形され、注出口が形成され、注出口を覆い、内側樹脂層の内面にシールされたインナーテープと、外側樹脂層の外面及びインナーテープの外面にシールして注出口を密封するプルタブと、を有する。
飲用時にプルタブを引き上げることにより、インナーテープが引きちぎられて注出口が開口され、内容物を飲むことができる。 By pulling up the pull tab when drinking, the inner tape is torn off and the spout is opened, allowing the contents to be drunk. A wrapping paper container according to the present invention is formed from a laminated packaging material including an inner resin layer, a paper layer, and an outer resin layer, and includes an inner tape formed with a spout, covering the spout, and sealed to the inner surface of the inner resin layer. And a pull tab for sealing the spout by sealing to the outer surface of the outer resin layer and the outer surface of the inner tape. A wrapping paper container according to the present invention is formed from a laminated packaging material including an inner resin layer, a paper layer, and an outer resin layer, and includes an inner tape formed with a spout, covering the spout, and sealed to the And a pull tab for sealing the spout by sealing to the outer surface of the outer resin layer and the outer surface of the inner tape.
By pulling up the pull tab at the time of drinking, the inner tape is torn off, the spout is opened, and the contents can be drunk. By pulling up the pull tab at the time of drinking, the inner tape is torn off, the spout is opened, and the contents can be drunk.

この発明による特徴において、インナーテープが低密度ポリエチレンの両外側層とエチレン−ビニルアルコール共重合体の中間層とからなる。
エチレン−ビニルアルコール共重合体は、エチレン−酢酸ビニル共重合体けん化物(EVOH)であり、ガスバリア性を有する。 The ethylene-vinyl alcohol copolymer is an ethylene-vinyl acetate copolymer saponified product (EVOH) and has a gas barrier property. このEVOH層は、層内で電子密度の高い部分と低い部分とがはっきり分かれて極性が強いために極性のない酸素ガスとは親和性がなく、ポリマー中で水酸基(OH)同士が強く引きあって層内にほとんど隙間がないなどのために、酸素ガスが容易にバリア層内を通過することができない。 In this EVOH layer, a portion having a high electron density and a portion having a low electron density are clearly separated in the layer and have strong polarity, so that they have no affinity for non-polar oxygen gas, and hydroxyl groups (OH) are strongly attracted to each other in the polymer. Oxygen gas cannot easily pass through the barrier layer because there are almost no gaps in the layer. 容器のバリア性の隙間である注出口の端面を、インナーテープでバリア性を補うことができる。 Inner tape can be used to supplement the barrier property of the end face of the spout, which is the barrier property gap of the container. In the feature of the present invention, the inner tape is composed of both outer layers of low density polyethylene and an intermediate layer of ethylene-vinyl alcohol copolymer. In the feature of the present invention, the inner tape is composed of both outer layers of low density polyethylene and an intermediate layer of ethylene-vinyl alcohol copolymer.
The ethylene-vinyl alcohol copolymer is a saponified ethylene-vinyl acetate copolymer (EVOH) and has gas barrier properties. This EVOH layer has a high polarity and a high polarity because the portion with high electron density is clearly separated in the layer, so it has no affinity with non-polar oxygen gas, and hydroxyl groups (OH) strongly attract each other in the polymer. For example, oxygen gas cannot easily pass through the barrier layer because there are almost no gaps in the layer. The end face of the spout, which is a gap between the barrier properties of the container, can be supplemented with the inner tape. This EVOH layer has a high polarity and a high polarity because the portion with high electron density is clearly separated in the layer, so it. The ethylene-vinyl alcohol copolymer is a saponified glycol (EVOH) and has gas barrier properties. Has no affinity with non-polar oxygen gas, and hydroxyl groups (OH) strongly attract each other in the polymer. For example, oxygen gas cannot easily pass through the barrier layer because there are almost no gaps in the layer. The end face of the spout, which is a gap between the barrier properties of the container, can be supplemented with the inner tape.

この発明による第2の特徴において、注出口の少なくとも開封開始箇所及び/又はその近傍に、インナーテープ外部から照射されたレーザー光によって中間層に選択的に機械的脆弱点又は/及び線が形成されている。
ある特定のレーザー光は、インナーテープの低密度ポリエチレンの両外側層を実質的に透過し、エチレン−ビニルアルコール共重合体の中間層に選択的に吸収される。吸収されたレーザー光は、照射された箇所を加熱しEVOHの一部を分解しガスを膨張させて、照射箇所を機械的に弱める。すなわち、脆弱点又は/及び線を形成する。
形成された脆弱点又は/及び線は、注出口の少なくとも開封開始箇所及び/又はその近傍であるので、飲用時にプルタブを引き上げることにより、インナーテープが設計通りに引きちぎられて注出口が開口され、内容物を飲むことができる。 Since the formed fragility points and / and lines are at least at the opening start point and / or in the vicinity of the spout, by pulling up the pull tab during drinking, the inner tape is torn off as designed and the spout is opened. You can drink the contents. In the second aspect of the present invention, mechanical weak points or / and lines are selectively formed in the intermediate layer by laser light irradiated from the outside of the inner tape at least at the opening start position of the spout and / or in the vicinity thereof. ing. In the second aspect of the present invention, mechanical weak points or / and lines are selectively formed in the intermediate layer by laser light irradiation from the outside of the inner tape at least at the opening start position of the spout and / or in the vicinity thereof. Ing.
Certain laser light passes substantially through both outer layers of the low density polyethylene of the inner tape and is selectively absorbed by the intermediate layer of the ethylene-vinyl alcohol copolymer. The absorbed laser light heats the irradiated part, decomposes a part of EVOH, expands the gas, and mechanically weakens the irradiated part. That is, a weak point or / and a line are formed. Certain laser light passes substantially through both outer layers of the low density polyethylene of the inner tape and is selectively absorbed by the intermediate layer of the ethylene-vinyl alcohol copolymer. The absorbed laser light heats the similarly part, decomposes a part of EVOH, expands The gas, and mechanically weakens the copolymer part. That is, a weak point or / and a line are formed.
Since the formed weak point or / and line is at least the opening start position of the spout and / or the vicinity thereof, by pulling up the pull tab at the time of drinking, the inner tape is torn off as designed to open the spout, You can drink the contents. Since the formed weak point or / and line is at least the opening start position of the spout and / or the vicinity thereof, by pulling up the pull tab at the time of drinking, the inner tape is torn off as designed to open the spout , You can drink the contents.

また、インナーテープの低密度ポリエチレンの両外側層を実質的に透過するので、外側層に損傷を与えていない。エチレン−ビニルアルコール共重合体の中間層においては、その一部のみ分解するだけであるので、残ったEVOHはそのバリア性を維持し、容器全体のバリア性を損なうことがない。 Further, since the outer layers of the low density polyethylene of the inner tape are substantially permeated, the outer layers are not damaged. In the intermediate layer of the ethylene-vinyl alcohol copolymer, only a part thereof is decomposed, so that the remaining EVOH maintains its barrier property and does not impair the barrier property of the entire container.

この発明の容器製造装置では、内側樹脂層、紙層及び外側樹脂層を含む積層包装材料から成形され、注出口が形成され、注出口を覆い、内側樹脂層の内面にシールされたインナーテープと、外側樹脂層の外面及びインナーテープの外面にシールして注出口を密封するプルタブと、を有する包装紙容器を製造する。 In the container manufacturing apparatus of the present invention, an inner tape molded from a laminated packaging material including an inner resin layer, a paper layer, and an outer resin layer, a spout is formed, covers the spout, and is sealed to the inner surface of the inner resin layer; And a wrapping paper container having a pull tab that seals the outer surface of the outer resin layer and the outer surface of the inner tape to seal the spout.

低密度ポリエチレンの両外側層とエチレン−ビニルアルコール共重合体の中間層とからなるインナーテープに、インナーテープ外部からレーザー光を照射するレーザー光照射手段は、インナーテープが内側樹脂層の内面にシールされる直後若しくは直前にレーザー光を照射するように、安価に簡易に設置することができる。
レーザー光は、容易に照射位置を制御でき、中間層の注出口の少なくとも開封開始箇所及び/又はその近傍に、正確に照射されて、選択的に機械的脆弱点又は/及び線を形成することができる。 The laser beam can easily control the irradiation position and is accurately irradiated at least at the opening start point and / or in the vicinity of the spout of the intermediate layer to selectively form mechanical fragility points or / and lines. Can be done. Laser light irradiation means for irradiating laser light from the outside of the inner tape to the inner tape consisting of both outer layers of low density polyethylene and an intermediate layer of ethylene-vinyl alcohol copolymer, the inner tape is sealed to the inner surface of the inner resin layer It can be easily installed at a low cost so that the laser beam is irradiated immediately after or immediately before. Laser light irradiation means for irradiating laser light from the outside of the inner tape to the inner tape consisting of both outer layers of low density polyethylene and an intermediate layer of ethylene-vinyl alcohol copolymer, the inner tape is sealed to the inner surface of the inner resin layer It can be easily installed at a low cost so that the laser beam is polyethylene immediately after or immediately before.
The irradiation position of the laser beam can be easily controlled, and it is accurately irradiated at least at the opening start position and / or the vicinity thereof at the outlet of the intermediate layer to selectively form a mechanical weak point or / and a line. Can do. The irradiation position of the laser beam can be easily controlled, and it is accurately disposed at least at the opening start position and / or the vicinity thereof at the outlet of the intermediate layer to selectively form a mechanical weak point or / and a line. Can do.

以下、本発明の実施の形態について図面を参照しながら詳細に説明する。
図1は本発明の一実施例を示す積層包装材料の一部の断面図である。この包装材料には、注出口が形成され、この注出口を覆い、内側樹脂層の内面にシールされたインナーテープと、外側樹脂層の外面及びインナーテープの外面にシールして注出口を密封するプルタブと、を有する。この積層包装材料を用いて包装容器が成形される。なお、容器成形後には、図中の上側が容器内部側になる。
図2は本発明の実施例によるレーザー光照射手段の概略図を示す。 FIG. 2 shows a schematic view of the laser light irradiation means according to the embodiment of the present invention. インナーテープ外部からレーザー光を照射するレーザー光照射手段は、インナーテープが内側樹脂層の内面にシールされる直後にレーザー光を照射する。 The laser light irradiating means for irradiating the laser light from the outside of the inner tape irradiates the laser light immediately after the inner tape is sealed on the inner surface of the inner resin layer. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Embodied, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a partial cross-sectional view of a laminated packaging material showing an embodiment of the present invention. The packaging material is formed with a spout, covers the spout, and seals the spout by sealing the inner tape sealed to the inner surface of the inner resin layer and the outer surface of the outer resin layer and the outer surface of the inner tape. And a pull tab. A packaging container is formed using this laminated packaging material. In addition, after container forming, the upper side in the figure becomes the container inner side. FIG. 1 is a partial cross-sectional view of a laminated packaging material showing an embodiment of the present invention. The packaging material is formed with a spout, covers the spout, and seals the spout by sealing the inner tape sealed to the inner surface A packaging container is formed using this laminated packaging material. In addition, after container forming, the upper side in. Of the inner resin layer and the outer surface of the outer resin layer and the outer surface of the inner tape. And a pull tab. the figure becomes the container inner side.
FIG. 2 is a schematic view of laser light irradiation means according to an embodiment of the present invention. The laser beam irradiation means for irradiating the laser beam from the outside of the inner tape irradiates the laser beam immediately after the inner tape is sealed to the inner surface of the inner resin layer. FIG. 2 is a schematic view of laser light irradiation means according to an embodiment of the present invention. The laser beam irradiation means for irradiating the laser beam from the outside of the inner tape irradiates the laser beam immediately after the inner tape is sealed to the inner surface of the inner resin layer.

図5に示す例の容器1は、その頂部3に注出口2を有し、この注出口2を覆うプルタブ4を備える。容器は、図1に示す積層包装材料7からなる。積層包装材料7は、この態様において、内側から順にポリエチレン樹脂層(内側樹脂層)7b、アルミ箔層、紙層7c及びポリエチレン樹脂層(外側樹脂層)7aから形成される。なお、アルミ箔層の両側には図示しない接着性樹脂層を形成するとともに、外側表面には必要に応じて印刷が施される。 The container 1 in the example shown in FIG. 5 has a spout 2 at the top 3 thereof, and includes a pull tab 4 that covers the spout 2. A container consists of the laminated packaging material 7 shown in FIG. In this embodiment, the laminated packaging material 7 is formed from a polyethylene resin layer (inner resin layer) 7b, an aluminum foil layer, a paper layer 7c, and a polyethylene resin layer (outer resin layer) 7a in this order from the inside. An adhesive resin layer (not shown) is formed on both sides of the aluminum foil layer, and printing is performed on the outer surface as necessary.

図1において、注出口2は、包装材料7の所定箇所に形成されたパンチ孔から成る。インナーテープ6は、包装材料7の内側表面7bにヒートシールされ、注出口2を密封する。インナーテープ6は、ポリエチレン、エチレン−ビニルアルコール共重合体(EVOH)及びポリエステルなどを積層したフィルムである。必要に応じて、接着剤層が層間に形成される。プルタブ4はアルミニウムフィルムとポリエチレン層とからなる。プルタブ4はポリエチレン層を介して包装材料7の外側表面7aにヒートシールされる。 In FIG. 1, the spout 2 is composed of punch holes formed at predetermined locations on the packaging material 7. The inner tape 6 is heat sealed to the inner surface 7 b of the packaging material 7 and seals the spout 2. The inner tape 6 is a film in which polyethylene, ethylene-vinyl alcohol copolymer (EVOH), polyester, and the like are laminated. If necessary, an adhesive layer is formed between the layers. The pull tab 4 is made of an aluminum film and a polyethylene layer. The pull tab 4 is heat sealed to the outer surface 7a of the packaging material 7 via a polyethylene layer.

図2に示すレーザー光照射手段8は、インナーテープ6の外部からレーザー光9を照射する。レーザー光照射手段8は、インナーテープ6が内側樹脂層の内面にシールされる直後にレーザー光9を照射する。
このレーザー光照射手段8は、注出口の少なくとも開封開始箇所及び/又はその近傍に、レーザー光を照射し、インナーテープ6の中間層に選択的に機械的脆弱点又は/及び線10を形成する。
The laser beam irradiation means 8 shown in FIG. 2 irradiates the laser beam 9 from the outside of the inner tape 6. The laser beam irradiation means 8 irradiates the laser beam 9 immediately after the inner tape 6 is sealed to the inner surface of the inner resin layer.
This laser light irradiation means 8 irradiates laser light at least at the opening start position and / or the vicinity thereof at the spout, and selectively forms mechanical weak points or / and lines 10 in the intermediate layer of the inner tape 6. . This laser light irradiation means 8 irradiates laser light at least at the opening start position and / or the vicinity thereof at the spout, and selectively forms mechanical weak points or / and lines 10 in the intermediate layer of the inner tape 6.

この発明において用いられるレーザー光は、炭酸ガスレーザーである。炭酸ガスレーザーとはガスレーザーの一種であり、赤外線(IR)を発振しメジャーな波長としては10.6ミクロンを発振する。この炭酸ガスレーザーは、インナーテープの低密度ポリエチレンの両外側層を実質的に透過し、エチレン−ビニルアルコール共重合体の中間層に選択的に吸収される。具体的には、低密度ポリエチレンに対して20%の吸収率を、他方、エチレン−ビニルアルコール共重合体に対して75%の吸収率を示す。従って、EVOH中間層で大部分吸収されたレーザー光は、照射された箇所を加熱しEVOHの一部を分解しガスを膨張させて、照射箇所を機械的に弱め、脆弱点又は/及び線を形成する。
形成された脆弱点又は/及び線は、注出口の少なくとも開封開始箇所及び/又はその近傍であるので、飲用時にプルタブを引き上げることにより、インナーテープが設計通りに引きちぎられて注出口が開口され、内容物を飲むことができる。 Since the formed fragility points and / and lines are at least at the opening start point and / or in the vicinity of the spout, by pulling up the pull tab during drinking, the inner tape is torn off as designed and the spout is opened. You can drink the contents. The laser beam used in the present invention is a carbon dioxide laser. A carbon dioxide laser is a type of gas laser that oscillates infrared (IR) and oscillates 10.6 microns as a major wavelength. The carbon dioxide laser is substantially transmitted through both outer layers of the low-density polyethylene of the inner tape, and is selectively absorbed by the intermediate layer of the ethylene-vinyl alcohol copolymer. Specifically, it has an absorption rate of 20% for low-density polyethylene and an absorption rate of 75% for ethylene-vinyl alcohol copolymer. Therefore, the laser light mostly absorbed by the EVOH intermediate layer heats the irradiated part, decomposes a part of the EVOH, expands the gas, weakens the irradiated part mechanically, and weak points or / and lines are removed. Form. The carbon dioxide laser is substantially transmitted through both outer layers. The laser beam used in the present invention is a carbon dioxide laser. A carbon dioxide laser is a type of gas laser that oscillates infrared (IR) and oscillates 10.6 meters as a major wavelength. of the low-density polyethylene of the inner tape, and is selectively absorbed by the intermediate layer of the wavelength-vinyl alcohol copolymer. Specifically, it has an absorption rate of 20% for low-density polyethylene and an absorption rate of 75% for Therefore, the laser light mostly absorbed by the EVOH intermediate layer heats the utilizing part, decomposes a part of the EVOH, expands the gas, weakens the similarly part mechanically, and weak points or / and lines are removed. Form.
Since the formed weak point or / and line is at least the opening start position of the spout and / or the vicinity thereof, by pulling up the pull tab at the time of drinking, the inner tape is torn off as designed to open the spout, You can drink the contents. Since the formed weak point or / and line is at least the opening start position of the spout and / or the vicinity thereof, by pulling up the pull tab at the time of drinking, the inner tape is torn off as designed to open the spout , You can drink the contents.

[評価例]
下記積層構造のインナーテープを試作する。
低密度ポリエチレン(LDPE、16〜20ミクロン)/接着剤層(ad、5ミクロン)/エチレン−ビニルアルコール共重合体(5ミクロン)/ad(5ミクロン)/LDPE(16〜20ミクロン)

このインナーテープに、炭酸ガスレーザーを照射条件(出力25w、Power Duty;10%、アシスト・エアー;使用せず、マスク;使用せず、照射速度;160mm/秒、ビーム径;0.2mm)で照射する。 This inner tape is irradiated with a carbon dioxide laser under irradiation conditions (output 25w, Power Duty; 10%, assist air; not used, mask; not used, irradiation speed; 160 mm / sec, beam diameter; 0.2 mm). Irradiate. [Evaluation example] [Evaluation example]
Trial manufacture of inner tape with the following laminated structure. Trial manufacture of inner tape with the following laminated structure.
Low density polyethylene (LDPE, 16-20 microns) / adhesive layer (ad, 5 microns) / ethylene-vinyl alcohol copolymer (5 microns) / ad (5 microns) / LDPE (16-20 microns) Low density polyethylene (LDPE, 16-20 micron) / adhesive layer (ad, 5 micron) / ethylene-vinyl alcohol copolymer (5 epitaxial) / ad (5 epitaxial) / LDPE (16-20 micron)
Carbon dioxide laser is irradiated to this inner tape under the conditions of irradiation (output 25 w, Power Duty: 10%, assist air; not used, mask; not used, irradiation speed: 160 mm / second, beam diameter: 0.2 mm) Irradiate. Carbon dioxide laser is insulating to this inner tape under the conditions of irradiation (output 25 w, Power Duty: 10%, assist air; not used, mask; not used, irradiation speed: 160 mm / second, beam diameter: 0.2 mm) Irradiate.

図4に、レーザー光照射のインナーテープの拡大断面写真を示す。この写真に示されているように、照射によって、炭酸ガスレーザー光が、インナーテープの低密度ポリエチレンの外側層を実質的に透過し、エチレン−ビニルアルコール共重合体の中間層に選択的に吸収され、レーザー光は、照射された箇所を加熱しEVOHの一部を分解しガスを膨張させて、照射箇所を機械的に弱めることがわかる。また、残留したEVOHがテープのガスバリア性を維持している。 FIG. 4 shows an enlarged cross-sectional photograph of the inner tape irradiated with laser light. As shown in this photo, carbon dioxide laser light is substantially transmitted through the outer layer of the low-density polyethylene of the inner tape by irradiation, and is selectively absorbed by the intermediate layer of the ethylene-vinyl alcohol copolymer. Then, it can be seen that the laser beam heats the irradiated part, decomposes a part of EVOH, expands the gas, and mechanically weakens the irradiated part. Moreover, the remaining EVOH maintains the gas barrier property of the tape.

なお、本発明は前記実施の形態に限定されるものではなく、本発明の趣旨に基づいて種々変形させることが可能であり、それらを本発明の範囲から排除するものではない。 In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

この発明の包装容器及び容器製造装置によって、牛乳、ジュース、ミネラルウォーターなどの飲料、流動食品などの包装容器を製造することができる。 The packaging container and container manufacturing apparatus of the present invention can manufacture packaging containers for beverages such as milk, juice, mineral water, and liquid foods.

本発明の実施例に用いられる積層包装材料の概略図Schematic of laminated packaging material used in examples of the present invention 本発明の実施例のレーザー照射手段の動作を示す概略図Schematic showing the operation of the laser irradiation means of an embodiment of the present invention プルタブ貼着装置を示す概略図Schematic showing the pull-tab application device インナーテープの拡大断面写真Enlarged cross section of inner tape 包装紙容器の一部斜視図Partial perspective view of wrapping paper container

符号の説明Explanation of symbols

1 包装容器
2 注出口
4 プルタブ
6 インナーテープ
1 Packaging container 2 Outlet 4 Pull tab 6 Inner tape

Claims (2)

  1. 内側樹脂層、紙層及び外側樹脂層を含む積層包装材料から成形され、注出口が形成され、該注出口を覆い、該内側樹脂層の内面にシールされたインナーテープと、該外側樹脂層の外面及び該インナーテープの外面にシールして該注出口を密封するプルタブと、を有する包装紙容器であって、
    該インナーテープが低密度ポリエチレンの両外側層とエチレン−ビニルアルコール共重合体の中間層とからなり、注出口の少なくとも開封開始箇所及び/又はその近傍に、該インナーテープ外部から照射されたレーザー光によって該中間層に選択的に機械的脆弱点又は/及び線が形成されていることを特徴とする包装紙容器。 The inner tape is composed of both outer layers of low-density polyethylene and an intermediate layer of an ethylene-vinyl alcohol copolymer, and laser light emitted from the outside of the inner tape at least at the opening start point and / or in the vicinity of the spout. A wrapping paper container characterized in that mechanical fragility and / and lines are selectively formed in the intermediate layer. An inner tape molded from a laminated packaging material including an inner resin layer, a paper layer, and an outer resin layer, forming a spout, covering the spout, and sealed to the inner surface of the inner resin layer, and the outer resin layer A wrapping paper container having an outer surface and a pull tab for sealing the spout by sealing to the outer surface of the inner tape, An inner tape molded from a laminated packaging material including an inner resin layer, a paper layer, and an outer resin layer, forming a spout, covering the spout, and sealed to the inner surface of the inner resin layer, and the outer resin layer A wrapping paper container having an outer surface and a pull tab for sealing the spout by sealing to the outer surface of the inner tape,
    The inner tape comprises both outer layers of low-density polyethylene and an intermediate layer of ethylene-vinyl alcohol copolymer, and laser light irradiated from the outside of the inner tape at least at the opening start position and / or in the vicinity thereof. A wrapping paper container, wherein mechanical weak points or / and lines are selectively formed in the intermediate layer. The inner tape wrapping both outer layers of low-density polyethylene and an intermediate layer of ethylene-vinyl alcohol copolymer, and laser light copolymer from the outside of the inner tape at least at the opening start position and / or in the vicinity thereof. A wrapping paper container, wherein mechanical weak points or / and lines are selectively formed in the intermediate layer.
  2. 内側樹脂層、紙層及び外側樹脂層を含む積層包装材料から成形され、注出口が形成され、該注出口を覆い、該内側樹脂層の内面にシールされたインナーテープと、該外側樹脂層の外面及び該インナーテープの外面にシールして該注出口を密封するプルタブと、を有する包装紙容器の製造装置であって、
    低密度ポリエチレンの両外側層とエチレン−ビニルアルコール共重合体の中間層とからなる該インナーテープに、該インナーテープ外部からレーザー光を照射するレーザー光照射手段を備え、該中間層の該注出口の少なくとも開封開始箇所及び/又はその近傍に、選択的に機械的脆弱点又は/及び線を形成することを特徴とする容器製造装置。 The inner tape composed of both outer layers of low-density polyethylene and an intermediate layer of an ethylene-vinyl alcohol copolymer is provided with a laser beam irradiation means for irradiating laser light from the outside of the inner tape, and the spout of the intermediate layer. A container manufacturing apparatus characterized in that mechanical fragility points and / or lines are selectively formed at least at the opening starting point and / or in the vicinity thereof. An inner tape molded from a laminated packaging material including an inner resin layer, a paper layer, and an outer resin layer, forming a spout, covering the spout, and sealed to the inner surface of the inner resin layer, and the outer resin layer A wrapping paper container manufacturing device having an outer surface and a pull tab that seals the spout by sealing to the outer surface of the inner tape, An inner tape molded from a laminated packaging material including an inner resin layer, a paper layer, and an outer resin layer, forming a spout, covering the spout, and sealed to the inner surface of the inner resin layer, and the outer resin layer A wrapping paper container manufacturing device having an outer surface and a pull tab that seals the spout by sealing to the outer surface of the inner tape,
    The inner tape comprising both outer layers of low-density polyethylene and an intermediate layer of ethylene-vinyl alcohol copolymer is provided with laser light irradiation means for irradiating laser light from the outside of the inner tape, and the spout of the intermediate layer A mechanical weak point or / and a line are selectively formed at least at the opening start location and / or in the vicinity thereof. The inner tape comprising both outer layers of low-density polyethylene and an intermediate layer of ethylene-vinyl alcohol copolymer is provided with laser light irradiation means for irradiating laser light from the outside of the inner tape, and the spout of the intermediate layer A mechanical weak point or / and a line are selectively formed at least at the opening start location and / or in the vicinity thereof.
JP2006298321A 2006-11-01 2006-11-01 Packaging paper container and container manufacturing apparatus Pending JP2008114871A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01116134A (en) * 1987-10-27 1989-05-09 Takakura Interior Kogyo Kk Fireproofing protection construction method of steelwork
JPH0848326A (en) * 1994-06-10 1996-02-20 Tetra Laval Holdings & Finance Sa Container and its manufacture
JPH11292093A (en) * 1998-04-13 1999-10-26 Ueno Hiroshi Easily openable packaging bag and its manufacture
JPH11301656A (en) * 1998-04-16 1999-11-02 Nihon Tetrapak Kk Packaging container, and cover member used for the packaging container
JP2000190958A (en) * 1999-01-05 2000-07-11 Nihon Tetra Pak Kk Packaging container
JP2003040285A (en) * 2001-08-01 2003-02-13 Fujimori Kogyo Co Ltd Method for forming easy unsealing means, and pouch with easily unsealing means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01116134A (en) * 1987-10-27 1989-05-09 Takakura Interior Kogyo Kk Fireproofing protection construction method of steelwork
JPH0848326A (en) * 1994-06-10 1996-02-20 Tetra Laval Holdings & Finance Sa Container and its manufacture
JPH11292093A (en) * 1998-04-13 1999-10-26 Ueno Hiroshi Easily openable packaging bag and its manufacture
JPH11301656A (en) * 1998-04-16 1999-11-02 Nihon Tetrapak Kk Packaging container, and cover member used for the packaging container
JP2000190958A (en) * 1999-01-05 2000-07-11 Nihon Tetra Pak Kk Packaging container
JP2003040285A (en) * 2001-08-01 2003-02-13 Fujimori Kogyo Co Ltd Method for forming easy unsealing means, and pouch with easily unsealing means

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