JP6834157B2

JP6834157B2 - Liquid paper container

Info

Publication number: JP6834157B2
Application number: JP2016054103A
Authority: JP
Inventors: 久貴山本
Original assignee: Dai Nippon Printing Co Ltd
Current assignee: Dai Nippon Printing Co Ltd
Priority date: 2016-03-17
Filing date: 2016-03-17
Publication date: 2021-02-24
Anticipated expiration: 2036-03-17
Also published as: JP2017165465A

Description

本発明は、日本酒、ワイン、焼酎等の酒類、コーヒー、乳飲料、ジュース、お茶等の液体飲料類等の包装に使用されるゲーベルトップ型の液体用紙容器に関し、特に使用済みとなった液体用紙容器を廃棄する際、容易に解体できるゲーベルトップ型の液体用紙容器に関する。 The present invention relates to a Goebel-top type liquid paper container used for packaging alcoholic beverages such as Japanese sake, wine and shochu, and liquid beverages such as coffee, dairy beverages, juice and tea. It relates to a Goebel top type liquid paper container that can be easily disassembled when the container is discarded.

従来、日本酒、ワイン、焼酎等の酒類、コーヒー、乳飲料、ジュース、お茶等の液体飲料類等の包装にゲーベルトップ型の液体用紙容器が広く使用されている。このような液体用紙容器は、積層体からなり、内容物の酸化劣化、味覚の低下を防止するため、アルミニウム箔層、アルミニウム蒸着層、無機酸化物蒸着層等のバリア層を設けた構成が知られている（例えば、特許文献１参照）。 Conventionally, a Goebel top type liquid paper container has been widely used for packaging sake, wine, liquor such as shochu, and liquid beverages such as coffee, milk beverage, juice, and tea. Such a liquid paper container is made of a laminated body, and it is known that the liquid paper container is provided with a barrier layer such as an aluminum foil layer, an aluminum vapor deposition layer, and an inorganic oxide vapor deposition layer in order to prevent oxidative deterioration and deterioration of taste of the contents. (See, for example, Patent Document 1).

近年、環境問題の高まりから使用後の空容器の廃棄に際し、容器の種類ごとの分別や、容器の減容化が行われるようになり、空容器は解体されるようになった。特にゲーベルトップ型の液体用紙容器は、通常、頂部の頂部形成板に液体内容物を注出するための注出用口栓が固着されており、注出用口栓は容易に分離することができなかった。注出用口栓を分離するために先ず頂部の頂部接着部を開口し、次に注出用口栓の固着された側の頂部形成板を鋏等で切って注出用口栓の周囲を切り注出口栓を頂部形成板から切り取るという分離操作が行われていた。 In recent years, due to growing environmental problems, when disposing of empty containers after use, sorting by type of container and volume reduction of containers have been carried out, and empty containers have been dismantled. In particular, in a Goebel top type liquid paper container, a pouring spout for pouring liquid contents is usually fixed to a top forming plate at the top, and the pouring spout can be easily separated. could not. In order to separate the pouring spout, first open the top adhesive part of the top, then cut the top forming plate on the side where the pouring spout is fixed with scissors or the like, and cut around the pouring spout. A separation operation was performed in which the incision outlet plug was cut off from the top forming plate.

しかしながら、その分離操作は手間がかかり面倒なものであり、さらにゲーベルトップ型の液体用紙容器の頂部接着部は液体内容物の漏れを防止するために高温高圧により強固に熱接着されており、頂部接着部を手で開口することが困難なことがあった。 However, the separation operation is troublesome and troublesome, and the top adhesive part of the Goebel top type liquid paper container is strongly heat-bonded by high temperature and high pressure to prevent leakage of the liquid contents, and the top part. It was sometimes difficult to open the adhesive part by hand.

そこで、胴部のサイドシール部の重ね合わせた外面側の容器本体形成用シートの端部に易剥離性のテープ状フィルムで形成されたプルタブにより胴部の側面板を切り破ってきっかけを設け、当該きっかけより解体できるようにした液体用紙容器が開示されている（例えば、特許文献２参照）。しかし、特許文献２に開示された液体用紙容器では、易剥離性のテープ状フィルムが余分に必要となり、また、胴部のサイドシール部が、易剥離性のテープ状フィルムが介在するために安定したシールができないことがある。 Therefore, a pull tab formed of an easily peelable tape-like film is used to cut through the side plate of the body at the end of the container body forming sheet on the outer surface side where the side seals of the body are overlapped. A liquid paper container that can be disassembled from the trigger is disclosed (see, for example, Patent Document 2). However, in the liquid paper container disclosed in Patent Document 2, an extra easily peelable tape-like film is required, and the side seal portion of the body portion is stable because the easily peelable tape-like film intervenes. Sometimes the seal cannot be made.

特開２００６−３２１４９５号公報Japanese Unexamined Patent Publication No. 2006-32149 特許第３８４３５１０号公報Japanese Patent No. 3843510

そこで本発明の目的は、上記問題点を解決するためになされたものであり、液体用紙容器としての性能を備え、使用後の液体用紙容器を簡単に解体でき、廃棄しやすくした液体用紙容器を提供することである。 Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a liquid paper container which has the performance as a liquid paper container, can easily disassemble the used liquid paper container, and is easy to dispose of. Is to provide.

本発明は、上記課題を達成するために、請求項１に記載の本発明は、厚さ方向にポリオレフィン系樹脂層、紙層、中間層、接着性樹脂層を備えた積層体で構成され、前面板と後面板と両側面板が連接状態の筒状の胴部と、前記前面板と前記後面板と前記両側面板に連接状態の頂部形成板で前記胴部の上端を閉塞する頂部と、前記前面板と前記後面板と前記両側面板に連接状態の底部形成板で前記胴部の下端を閉塞する底部からなるゲーベルトップ型の液体用紙容器であって、前記ポリオレフィン系樹脂層から前記紙層に渡る第一の傷を有し、前記第一の傷の深さは、前記紙層の厚さ方向に前記ポリオレフィン系樹脂層の側から前記紙層の厚さの１／２以上であり、前記第一の傷の形成位置は、前記頂部と前記胴部を連接する稜線より下方に１５ｍｍ乃至５０ｍｍの範囲内であり、前記中間層は蒸着層からなるバリア層と基材層を備え、前記蒸着層は前記紙層の側に位置しており、前記基材層は傷痕群からなる第二の傷を有し、前記傷痕群は、微細な切目からなり３列以上の複数列からなる領域を有しており、前記第一の傷と前記第二の傷が厚さ方向において略同位置に配されていることを特徴とする液体用紙容器である。 In order to achieve the above object, the present invention according to claim 1 is composed of a laminate provided with a polyolefin resin layer, a paper layer, an intermediate layer, and an adhesive resin layer in the thickness direction. A tubular body in which the front plate, the rear plate, and both side plates are connected to each other, a top in which the upper end of the body is closed by a top forming plate in which the front plate, the rear surface plate, and both side plates are connected to each other, and the above. A Goebel-top type liquid paper container including a bottom portion that closes the lower end of the body portion with a bottom forming plate that is connected to the front plate, the rear surface plate, and both side surface plates, from the polyolefin resin layer to the paper layer. It has a first scratch that crosses, and the depth of the first scratch is ½ or more of the thickness of the paper layer from the side of the polyolefin resin layer in the thickness direction of the paper layer. The formation position of the first scratch is within a range of 15 mm to 50 mm below the ridge line connecting the top and the body, and the intermediate layer includes a barrier layer and a base material layer made of a vapor deposition layer, and the vapor deposition The layer is located on the side of the paper layer, the base material layer has a second scratch consisting of a group of scars, and the group of scars consists of fine cuts and comprises a region consisting of three or more rows. It is a liquid paper container which has, and is characterized in that the first scratch and the second scratch are arranged at substantially the same position in the thickness direction.

また、請求項２に記載の本発明は、請求項１に記載の液体用紙容器において、前記第一の傷及び前記第二の傷が前記前面板、前記後面板、及び前記両側面板を跨ぎ、前記胴部の全周に延びる線状に設けられていることを特徴とするものである。 Further, according to the second aspect of the present invention, in the liquid paper container according to the first aspect, the first scratch and the second scratch straddle the front plate, the rear surface plate, and both side plates. It is characterized in that it is provided in a linear shape extending over the entire circumference of the body portion.

また、請求項３に記載の本発明は、請求項１または請求項２に記載の液体用紙容器において、前記胴部の両側面板及び前記両側面板に連接する前記頂部の頂部形成板の中央部にそれぞれ、前記胴部を折り畳むための胴部折線及び前記頂部を折り畳むための頂部折線が設けられていることを特徴とするものである。 Further, according to the third aspect of the present invention, in the liquid paper container according to the first or second aspect, the central portion of the top plate of the top portion connected to both side face plates of the body portion and the both side surface plates of the body portion. Each of them is characterized in that a body folding line for folding the body and a top folding line for folding the top are provided.

以上のように本発明によれば、液体用紙容器としての性能を備え、使用後の液体用紙容器を簡単に解体でき、廃棄しやすくした液体用紙容器とすることができる。 As described above, according to the present invention, it is possible to obtain a liquid paper container which has the performance as a liquid paper container, can be easily disassembled after use, and can be easily disposed of.

本発明に係る液体用紙容器の一実施形態を示す斜視図である。It is a perspective view which shows one Embodiment of the liquid paper container which concerns on this invention. 本発明に係る液体用紙容器の一実施形態の積層体例を示す断面図である。It is sectional drawing which shows the example of the laminated body of one Embodiment of the liquid paper container which concerns on this invention. 本発明に係る液体用紙容器の一実施形態に設ける第二の傷の傷痕群の２〜３の形状例を拡大して示す説明図である。It is explanatory drawing which enlarges and shows the shape example of 2-3 of the scar group of the 2nd scratch provided in one Embodiment of the liquid paper container which concerns on this invention. 本発明に係る液体用紙容器の一実施形態のブランクを示す平面図である。It is a top view which shows the blank of one Embodiment of the liquid paper container which concerns on this invention. 本発明に係る液体用紙容器の一実施形態の作用を示す説明図である。It is explanatory drawing which shows the operation of one Embodiment of the liquid paper container which concerns on this invention. 本発明に係る液体用紙容器の一実施形態の作用を示す説明図である。It is explanatory drawing which shows the operation of one Embodiment of the liquid paper container which concerns on this invention.

上記の本発明について、図面等を用いて以下に詳述する。
図１は本発明に係る液体用紙容器の一実施形態を示す斜視図、図２は本発明に係る液体用紙容器の一実施形態の積層体例を示す断面図、図３は本発明に係る液体用紙容器の一実施形態に設ける第二の傷の傷痕群の２〜３の形状例を拡大して示す説明図、図４は本発明に係る液体用紙容器の一実施形態のブランクを示す平面図、図５、図６は本発明に係る液体用紙容器の一実施形態の作用を示す説明図であり、図中のＡは液体用紙容器、Ａ’は空の液体用紙容器、Ｂはブランク、Ｃ、Ｃ’は積層体、Ｄは第一の傷、Ｅ、Ｅ’、Ｅ’’は第二の傷、ｅ１、ｅ２、ｅ３は傷痕群、ｅ１’、ｅ２’、ｅ３’は傷痕、１はポリオレフィン系樹脂層、２は紙層、３、５は接着層、４は中間層、４ａは基材層、４ｂ、４ｃはバリア層、６は接着性樹脂層、１０、１０’は胴部、１０ａは胴部折線、１１は後面板、１２、１４は側面板、１３は前面板、１５は接着板、２０、２０’は頂部、２０ａは頂部折線、２１、２２、２３、２４は頂部形成板、２５は注出口栓取付孔、２６は注出口栓、２７、２７’は頂部接着部、３０は底部、３１、３２、３３、３４は底部形成板をそれぞれ示す。 The above invention will be described in detail below with reference to drawings and the like.
FIG. 1 is a perspective view showing an embodiment of the liquid paper container according to the present invention, FIG. 2 is a cross-sectional view showing an example of a laminated body of the liquid paper container according to the present invention, and FIG. 3 is a liquid paper according to the present invention. An enlarged explanatory view showing a few shape examples of the scar group of the second scratch provided in one embodiment of the container, FIG. 4 is a plan view showing a blank of one embodiment of the liquid paper container according to the present invention. 5 and 6 are explanatory views showing the operation of one embodiment of the liquid paper container according to the present invention, in which A is a liquid paper container, A'is an empty liquid paper container, and B is a blank, C. C'is a laminate, D is a first scratch, E, E', E'' is a second scratch, e1, e2, e3 are scar groups, e1', e2', e3'are scars, and 1 is polyolefin. The resin layer, 2 is the paper layer, 3 and 5 are the adhesive layer, 4 is the intermediate layer, 4a is the base material layer, 4b and 4c are the barrier layer, 6 is the adhesive resin layer, 10 and 10'are the body, and 10a. Is the body folding line, 11 is the rear surface plate, 12 and 14 are the side plates, 13 is the front plate, 15 is the adhesive plate, 20 and 20'are the top, 20a is the top folding line, and 21, 22, 23 and 24 are the top forming plates. , 25 are spout plug mounting holes, 26 are spout plugs, 27 and 27'are top adhesive parts, 30 are bottoms, and 31, 32, 33 and 34 are bottom forming plates.

図１は本発明に係る液体用紙容器の一実施形態を示す斜視図である。本発明の液体用紙容器Ａは、図１に示すように四側面からなる筒状の胴部１０と、胴部１０の上端を閉塞する切妻型屋根の頂部２０と、胴部１０の下端を閉塞する底部３０と、からなるゲーベルトップ型の液体用紙容器である。図１では胴部１０を形成する前面板１３と側面板１２、及び頂部２０を形成する前面板１３に連接状態の頂部形成板２３と側面板１２に連接状態の頂部形成板２２が見えている。頂部形成板２３の傾斜面には注出口本体とキャップを備えた注出口栓２６が取り付けられている。頂部形成板２２は折り込まれて三角状の傾斜面となっている。なお、通常、注出口栓２６は設けられるものである。 FIG. 1 is a perspective view showing an embodiment of a liquid paper container according to the present invention. As shown in FIG. 1, the liquid paper container A of the present invention closes a tubular body portion 10 composed of four side surfaces, a top 20 of a gable roof that closes the upper end of the body portion 10, and a lower end of the body portion 10. It is a Goebel top type liquid paper container composed of a bottom portion 30 and a bottom portion 30. In FIG. 1, the front plate 13 and the side plate 12 forming the body portion 10 and the top forming plate 23 in the connected state to the front plate 13 forming the top 20 and the top forming plate 22 in the connected state to the side plate 12 are visible. .. A spout plug 26 having a spout body and a cap is attached to the inclined surface of the top forming plate 23. The top forming plate 22 is folded into a triangular inclined surface. Normally, the spout plug 26 is provided.

図２は本発明に係る液体用紙容器Ａを構成する積層体例を示す断面図であり、図２（イ）に示すように積層体Ｃは、厚さ方向にポリオレフィン系樹脂層１、紙層２、中間層４、接着性樹脂層６を備えており、中間層４は基材層４ａとバリア層４ｂから構成されている。そして、紙層２と中間層４の間、及び中間層４と接着性樹脂層６の間に必要により接着層３、接着層５を設け積層される。バリア層４ｂとしては防湿性、ガスバリア性を備え、液体用紙容器Ａに充填される内容物の酸化劣化、味覚低下等を防止し化学的に保護する性質を備える層であり、バリア層４ｂは、基材層４ａの上に設けられるアルミニウム等の金属蒸着層や、酸化アルミニウム、酸化珪素等の無機物を蒸着した蒸着層である。図２（ロ）に示す積層体Ｃ’はバリア層４ｃとしてアルミニウム等の金属箔を用いた例を示し、バリア層４ｂと同様の性質を備える。バリア層４ｃは基材層４ａとドライラミネーション法や押出しラミネーション法で積層されるものである。積層体Ｃの中間層４のバリア層４ｂは、紙層２、接着層３側に積層しているが、バリア層４ｂを接着性樹脂層６、接着層５側に積層することもできる。積層体Ｃ’の中間層４のバリア層４ｃは、紙層２、接着層３側に積層する方が好ましい。また、図示しないがポリオレフィン系樹脂層１の紙層２側と反対側の表出面に印刷層を設けることもできる。 FIG. 2 is a cross-sectional view showing an example of a laminated body constituting the liquid paper container A according to the present invention. As shown in FIG. 2 (a), the laminated body C has a polyolefin resin layer 1 and a paper layer 2 in the thickness direction. The intermediate layer 4 and the adhesive resin layer 6 are provided, and the intermediate layer 4 is composed of a base material layer 4a and a barrier layer 4b. Then, if necessary, an adhesive layer 3 and an adhesive layer 5 are provided between the paper layer 2 and the intermediate layer 4 and between the intermediate layer 4 and the adhesive resin layer 6 and laminated. The barrier layer 4b is a layer having moisture-proof property and gas barrier property, and has a property of preventing oxidative deterioration, deterioration of taste, etc. of the contents filled in the liquid paper container A and chemically protecting the barrier layer 4b. It is a metal vapor deposition layer such as aluminum provided on the base material layer 4a, or a vapor deposition layer on which an inorganic substance such as aluminum oxide or silicon oxide is deposited. The laminated body C'shown in FIG. 2B shows an example in which a metal foil such as aluminum is used as the barrier layer 4c, and has the same properties as the barrier layer 4b. The barrier layer 4c is laminated with the base material layer 4a by a dry lamination method or an extrusion lamination method. The barrier layer 4b of the intermediate layer 4 of the laminated body C is laminated on the paper layer 2 and the adhesive layer 3, but the barrier layer 4b can also be laminated on the adhesive resin layer 6 and the adhesive layer 5. It is preferable that the barrier layer 4c of the intermediate layer 4 of the laminated body C'is laminated on the paper layer 2 and the adhesive layer 3 side. Further, although not shown, a printing layer may be provided on the exposed surface of the polyolefin resin layer 1 on the side opposite to the paper layer 2 side.

図２に示すようにポリオレフィン系樹脂層１及び紙層２には第一の傷Ｄが設けられている。第一の傷Ｄはポリオレフィン系樹脂層１から紙層２に渡り、ポリオレフィン系樹脂層１を貫通し紙層２に達して設けられ、その厚み方向の傷の深さはポリオレフィン系樹脂層１から紙層２の厚さの略１／２以上に至るように設けるのが好ましい。また、紙層２を貫通してもよいが、この場合には第一の傷Ｄの形状はミシン目とすること好ましい。 As shown in FIG. 2, the polyolefin-based resin layer 1 and the paper layer 2 are provided with the first scratch D. The first scratch D extends from the polyolefin-based resin layer 1 to the paper layer 2, penetrates the polyolefin-based resin layer 1 and reaches the paper layer 2, and the depth of the scratch in the thickness direction is from the polyolefin-based resin layer 1. It is preferable to provide the paper layer 2 so as to have a thickness of about 1/2 or more. Further, the paper layer 2 may be penetrated, but in this case, the shape of the first scratch D is preferably perforated.

図２に示すように中間層４の基材層４ａには第二の傷Ｅが設けられている。図３は本発明に係る液体用紙容器の一実施形態に設ける第二の傷の傷痕群の２〜３の形状例を拡大して示す説明図である。図３（イ）には、第二の傷Ｅが傷痕ｅ１’からなる傷痕群ｅ１の例を示し、傷痕群ｅ１を形成する傷痕ｅ１’ は微細な切目が縦列して配された破線とされ、隣接する破線は並列して配され傷痕ｅ１’の位置が千鳥状になるように配列されている。また、破線は複数列からなり傷痕ｅ１’が千鳥状になるように配列されている。図３（ロ）は第二の傷Ｅ’が傷痕ｅ２’からなる傷痕群ｅ２の例を示し、傷痕群ｅ２を形成する傷痕ｅ２’が微細な点で形成されている。それ以外は図３（イ）と同じである。図３（ハ）は第二の傷Ｅ’’が傷痕ｅ３’からなる傷痕群ｅ３の例を示し、傷痕群ｅ３を形成する傷痕ｅ３’は一定の角度をなす微細な斜め切目からなり破線状に整列して配列されている。それ以外は図３（イ）と同じである。傷痕群ｅ１、ｅ２、ｅ３は所定の領域を有して設けられている。
傷痕ｅ１’’、ｅ２’’、ｅ３’’は中間層４の基材層４ａを貫通してもよいし、未貫通でもよく、あるいは貫通部分と未貫通部分の両方が混在していてもよい。 As shown in FIG. 2, a second scratch E is provided on the base material layer 4a of the intermediate layer 4. FIG. 3 is an enlarged explanatory view showing a few shape examples of the scar group of the second scratch provided in one embodiment of the liquid paper container according to the present invention. FIG. 3A shows an example of the scar group e1 in which the second scar E is composed of the scar e1', and the scar e1'forming the scar group e1 is a broken line in which fine cuts are arranged in a row. , The adjacent broken lines are arranged in parallel so that the positions of the scars e1'are staggered. The broken lines are composed of a plurality of rows, and the scars e1'are arranged in a staggered pattern. FIG. 3B shows an example of a scar group e2 in which the second scar E'is composed of scars e2', and the scars e2'forming the scar group e2 are formed at fine points. Other than that, it is the same as FIG. 3 (a). FIG. 3 (c) shows an example of a scar group e3 in which the second scar E'' is composed of scars e3', and the scars e3'forming the scar group e3 is formed of fine diagonal cuts forming a constant angle and has a broken line shape. It is arranged and arranged in. Other than that, it is the same as FIG. 3 (a). The scar groups e1, e2, and e3 are provided with a predetermined area.
The scars e1 ″, e2 ″, and e3 ″ may penetrate the base material layer 4a of the intermediate layer 4, may not penetrate, or both the penetrated portion and the non-penetrated portion may be mixed. ..

紙層２に形成された第一の傷Ｄと、中間層４の基材層４ａに形成された第二の傷Ｅ、Ｅ’、Ｅ’’と、が積層体Ｃ、Ｃ’の厚さ方向において略同位置に配されている。そうすることにより後述するが空の液体用紙容器Ａ’（図５参照）の頂部２０’ （図６参照）と胴部１０’ （図６参照）の分離が容易となる。 The first scratch D formed on the paper layer 2 and the second scratches E, E', E'' formed on the base material layer 4a of the intermediate layer 4 are the thicknesses of the laminated bodies C and C'. They are arranged at approximately the same position in the direction. By doing so, as will be described later, the top 20'(see FIG. 6) and the body 10'(see FIG. 6) of the empty liquid paper container A'(see FIG. 5) can be easily separated.

さらに厚さ方向に略同位置に形成された第一の傷Ｄと第二の傷Ｅは図１において胴部１０と頂部２０が連接される稜線またはその近傍に第一の傷Ｄは線状に第二の傷Ｅは帯状に第一の傷Ｄが第二の傷Ｅの領域内に位置するように設けられており、そうすることにより、より空の液体用紙容器Ａ’（図５参照）の頂部２０’と胴部１０’の分離が容易となり好ましい。 Further, in FIG. 1, the first scratch D and the second scratch E formed at substantially the same position in the thickness direction are linear in the ridge line where the body portion 10 and the top 20 are connected or in the vicinity thereof. The second scratch E is provided in a strip shape so that the first scratch D is located within the region of the second scratch E, whereby an empty liquid paper container A'(see FIG. 5). ) Can be easily separated from the top portion 20'and the body portion 10', which is preferable.

つぎに本発明の液体用紙容器Ａを作製するための積層体Ｃ、Ｃ’について説明する。表出面のポリオレフィン系樹脂層１としては低密度ポリエチレンや直鎖状低密度ポリエチレン等の熱接着可能な樹脂が使用される。これらの樹脂を用いて押出しラミネーション法により紙層２の紙基材の上に積層される。 Next, the laminates C and C'for producing the liquid paper container A of the present invention will be described. As the polyolefin-based resin layer 1 on the exposed surface, a heat-bondable resin such as low-density polyethylene or linear low-density polyethylene is used. These resins are used and laminated on the paper base material of the paper layer 2 by the extrusion lamination method.

紙層２の紙基材としては２５０〜４５０ｇ／ｍ²の坪量の板紙が使用される。 As the paper base material of the paper layer 2, a paperboard having a basis weight of 250 to ^{450 g / m 2 is used.}

接着層３は、紙層２と中間層４を接着させる層であり、低密度ポリエチレン、直鎖状低密度ポリエチレン、エチレン−αオレフイン共重合体、アイオノマー、エチレン−アクリル酸共重合体、エチレン−メタクリル酸共重合体、エチレン−アクリル酸エステル共重合体、エチレン−メタクリル酸エステル共重合体等のポリオレフィン系樹脂が用いられ、押出しラミネーション法により紙層２と中間層４を積層する。厚さは、通常、１０〜５０μｍである。 The adhesive layer 3 is a layer for adhering the paper layer 2 and the intermediate layer 4, and is a low-density polyethylene, a linear low-density polyethylene, an ethylene-α olephine copolymer, an ionomer, an ethylene-acrylic acid copolymer, and an ethylene-. A polyolefin resin such as a methacrylate copolymer, an ethylene-acrylic acid ester copolymer, or an ethylene-methacrylate copolymer is used, and the paper layer 2 and the intermediate layer 4 are laminated by an extrusion lamination method. The thickness is usually 10 to 50 μm.

中間層４は、基材層４ａとバリア層４ｂまたはバリア層４ｃとからなり、基材層４ａには蒸着加工適性やラミネーション加工適性の観点から加工適性の優れた二軸延伸されたポリエステルフィルム、ナイロンフィルム、ポリプロピレンフィルム等が用いられる。厚さは通常、４〜４０μｍであり、好ましくは９〜２５μｍである。バリア層４ｂとしては基材層４ａの上に設けられる蒸着層であり、蒸着層は基材層４ａを担体としてその上にアルミニウム等の金属や、酸化アルミニウム、酸化珪素等の無機物を蒸着することにより設けられる。また、バリア層４ｃとしては基材層４ａの上に設けられるアルミニウム等の金属箔であり、その金属箔の厚さは６μｍ〜１２μｍである。基材層４ａと金属箔のバリア層４ｃはドライラミネーション法や押出しラミネーション法で積層される。 The intermediate layer 4 is composed of a base material layer 4a and a barrier layer 4b or a barrier layer 4c, and the base material layer 4a is a biaxially stretched polyester film having excellent processing suitability from the viewpoint of vapor deposition processing suitability and lamination processing suitability. Nylon film, polypropylene film, etc. are used. The thickness is usually 4-40 μm, preferably 9-25 μm. The barrier layer 4b is a thin-film deposition layer provided on the base material layer 4a, and the vapor deposition layer uses the base material layer 4a as a carrier to deposit a metal such as aluminum or an inorganic substance such as aluminum oxide or silicon oxide on the base material layer 4a. Provided by. The barrier layer 4c is a metal leaf such as aluminum provided on the base material layer 4a, and the thickness of the metal leaf is 6 μm to 12 μm. The base material layer 4a and the barrier layer 4c of the metal foil are laminated by a dry lamination method or an extrusion lamination method.

接着層５は、接着層３と同じ樹脂を用いて押出しラミネーション法により中間層４と接着性樹脂層６を積層するためのものであり、その厚さは、通常、１０〜５０μｍである。また、接着層５として接着剤にポリエステルポリオール−イソシアネート系、ポリエーテルポリオール−イソシアネート系、ウレタン−イソシアネート系等の主剤と硬化剤とからなる２液タイプのドライラミネート用接着剤を用いてドライラミネーション法により積層することもできる。ドライラミネーション法の場合、接着層５の塗布量は、通常、固形分重量１〜５ｇ／ｍ² である。 The adhesive layer 5 is for laminating the intermediate layer 4 and the adhesive resin layer 6 by an extrusion lamination method using the same resin as the adhesive layer 3, and the thickness thereof is usually 10 to 50 μm. Further, as the adhesive layer 5, a two-component type dry laminating adhesive composed of a main agent such as polyester polyol-isocyanate type, polyether polyol-isocyanate type, urethane-isocyanate type and a curing agent is used as the adhesive, and a dry lamination method is used. Can also be laminated by. In the case of the dry lamination method, the coating amount of the adhesive layer 5 is usually 1 to 5 g / m ² in solid content weight.

接着性樹脂層６は、熱接着性樹脂が使用され、低密度ポリエチレン、中密度ポリエチレン、高密度ポリエチレン、直鎖状低密度ポリエチレン等の樹脂を用いたフィルムが使用される。特に環状ポリオレフィン樹脂等を用いた易引裂き性もしくは直線カット性を付与したフィルムを用いることが好ましい。接着性樹脂層６の厚さは通常２０〜１００μｍであり、接着層５の積層方法や内容物等の条件を加味して適宜決定される。 A heat-adhesive resin is used for the adhesive resin layer 6, and a film using a resin such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, or linear low-density polyethylene is used. In particular, it is preferable to use a film using a cyclic polyolefin resin or the like and having an easily tearable property or a linear cut property. The thickness of the adhesive resin layer 6 is usually 20 to 100 μm, and is appropriately determined in consideration of conditions such as the method of laminating the adhesive layer 5 and the contents.

図４は本発明に係る液体用紙容器Ａの一実施形態のブランクＢを示す外側から見た平面図である。図４に示すようにブランクＢは、筒状の胴部１０を形成するための後面板１１、側面板１２、前面板１３、側面板１４及び接着板１５が縦折罫（図４において上下方向）を介してそれぞれ連接され、それぞれの上端縁には頂部形成板２１、２２、２３、２４が横折罫（図４において左右方向）を介して連接され、それぞれの下端縁には底部３０を形成するための底部形成板３１、３２、３３、３４が横折罫を介して連接され、側面板１２及び側面板１４の中央部には胴部折線１０ａがそれぞれ形成され、胴部折線１０ａは上から下に向かい縦方向に延びる直線と、下部では当該直線が斜め下に向かって二方向に分離した斜線とからなる。具体的には側面板１２に形成された胴部折線１０ａの一方の斜線は底部形成板３２の上端の底部形成板３１側の角に向かい、他方の斜線は底部形成板３２の上端の底部形成板３３側の角に向かい延びている。側面板１４に形成された胴部折線１０ａの一方の斜線は底部形成板３４の上端の底部形成板３３側の角に向かい、他方の斜線は底部形成板３４の上端の接着板１５側の角に向かい延びている。頂部形成板２２、２４の中央部には縦方向に延びる頂部折線２０ａがそれぞれ形成されている。なお、頂部折線２０ａ及び胴部折線１０ａは、側面板１２と頂部形成板２２及び側面板１４と頂部形成板２４を連接する折罫に接せずに少し間隔をあけた状態で形成されている。そうすることにより液体用紙容器Ａの変形が防止できるので好ましい。
同様の理由で胴部折線１０ａの下方の斜線も折罫に接することなく少し間隔をあけた状態で形成されている。胴部折線１０ａ及び頂部折線２０ａは設ける方が好ましく、使用後の空の液体用紙容器Ａ’の折り畳み操作が容易となる。 FIG. 4 is a plan view of the blank B of the embodiment of the liquid paper container A according to the present invention as viewed from the outside. As shown in FIG. 4, in the blank B, the rear surface plate 11, the side plate 12, the front plate 13, the side plate 14 and the adhesive plate 15 for forming the tubular body portion 10 are vertically folded (vertically in FIG. 4). ), The top forming plates 21, 22, 23, 24 are connected to each upper end edge via a horizontal polygonal rule (left-right direction in FIG. 4), and the bottom 30 is connected to each lower end edge. The bottom forming plates 31, 32, 33, and 34 for forming are connected via the horizontal folding rule, and the body folding line 10a is formed at the center of the side plate 12 and the side plate 14, respectively, and the body folding line 10a is formed. It consists of a straight line extending in the vertical direction from top to bottom and a diagonal line in the lower part where the straight line is separated in two directions diagonally downward. Specifically, one diagonal line of the body folding line 10a formed on the side plate 12 faces the corner of the upper end of the bottom forming plate 32 toward the bottom forming plate 31, and the other diagonal line forms the bottom of the upper end of the bottom forming plate 32. It extends toward the corner on the plate 33 side. One diagonal line of the body folding line 10a formed on the side plate 14 faces the corner of the upper end of the bottom forming plate 34 on the bottom forming plate 33 side, and the other diagonal line is the corner of the upper end of the bottom forming plate 34 on the adhesive plate 15 side. It extends toward. A top folding line 20a extending in the vertical direction is formed at the center of the top forming plates 22 and 24, respectively. The top folding line 20a and the body folding line 10a are formed in a state of being slightly spaced apart from each other without being in contact with the folding rule connecting the side plate 12, the top forming plate 22, and the side plate 14 and the top forming plate 24. .. By doing so, deformation of the liquid paper container A can be prevented, which is preferable.
For the same reason, the diagonal line below the body folding line 10a is also formed at a slight interval without touching the folding rule. It is preferable to provide the body folding line 10a and the top folding line 20a, which facilitates the folding operation of the empty liquid paper container A'after use.

また、図４に示すように頂部形成板２３に注出口栓取付孔２５が設けられている。注出口栓取付孔２５は、ゲーベルトップ型の液体用紙容器が作製される際に例えばプラスチックを射出成形した注出口栓２６（図１参照）を取り付けるためのものである。注出口栓２６は必要により取り付けられるものである。 Further, as shown in FIG. 4, the top forming plate 23 is provided with a spout plug mounting hole 25. The spout plug mounting hole 25 is for mounting a spout plug 26 (see FIG. 1) obtained by injection molding plastic, for example, when a Goebel top type liquid paper container is manufactured. The spout plug 26 is attached if necessary.

本発明の液体用紙容器Ａは積層体Ｃ、Ｃ’等を用いて押罫と切刃を備えた抜き型で打ち抜き図４に示すブランクＢが作製される。また、第一の傷Ｄも打ち抜きのとき、所定のハーフカット刃を備えた型でハーフカットにより形成される。ハーフカット刃は抜き型に備えることにより打ち抜きと同時に形成することもできる。抜き型とハーフカット型を別型で行う場合、インラインンの工程で行うことが抜き位置とハーフカットの位置の見当精度が向上するので好ましい。折罫や胴部折線１０ａや頂部折線２０ａは打ち抜く際、押罫により同時に形成される。なお、図４において、折罫は一点鎖線、胴部折線１０ａや頂部折線２０ａは破線、第一の傷Ｄは点線、第二の傷Ｅは網目でそれぞれ示している。 In the liquid paper container A of the present invention, a blank B shown in FIG. 4 is produced by punching using laminated bodies C, C'and the like with a punching die provided with a ruled line and a cutting edge. Further, when the first scratch D is also punched, it is formed by half-cutting with a mold provided with a predetermined half-cut blade. The half-cut blade can be formed at the same time as punching by preparing the punching die. When the punching die and the half-cutting die are performed separately, it is preferable to perform the punching die and the half-cutting die in the inline process because the registration accuracy of the punching position and the half-cutting position is improved. The fold line, the body fold line 10a, and the top fold line 20a are simultaneously formed by the fold line when punching. In FIG. 4, the fold line is indicated by a chain line, the body fold line 10a and the top fold line 20a are indicated by a broken line, the first scratch D is indicated by a dotted line, and the second scratch E is indicated by a mesh.

本発明の液体用紙容器Ａを構成するブランクＢの積層体Ｃ、Ｃ’には第一の傷Ｄが横折罫（図４では左右方向）に平行して直線状に設けられている。第一の傷Ｄは後面板１１、側面板１２、前面板１３、側面板１４、接着板１５を跨ぎ、ブランクＢを横断して形成されているので組み立てると図１に示すように液体用紙容器Ａの胴部１０の全周に渡り一周するように設けられることになる。第一の傷Ｄを形成する位置は胴部１０と頂部２０が連接される位置、すなわち、後面板１１と頂部形成板２１、側面板１２と頂部形成板２２、前面板１３と頂部形成板２３、側面板１４と頂部形成板２４を連接する横折罫（以下、頂部形成用横折罫という。）及びそれに連結する接着板１５に形成された頂部形成用横折罫の位置、乃至は当該頂部形成用横折罫の位置から下方に５０ｍｍ以内の範囲に設けることができる。より好ましい位置は頂部形成用横折罫から１５ｍｍ以上離れた位置から３５ｍｍ下方の範囲内である。また、第一の傷Ｄは傷が連続するハの字状ミシン目形状にするのが好ましい。ハの字状ミシン目は頂部形成用横折罫に沿って並んで形成され数列設けることができる。第一の傷Ｄは紙層２に積層されたポリオレフィン系樹脂層１から紙層２に渡るようにハーフカット加工を施すことにより設けることができる。 The first scratch D is provided linearly in parallel with the horizontal folding rule (in the left-right direction in FIG. 4) in the laminated bodies C and C'of the blanks B constituting the liquid paper container A of the present invention. The first scratch D straddles the rear surface plate 11, the side plate 12, the front plate 13, the side plate 14, and the adhesive plate 15 and is formed across the blank B. Therefore, when assembled, the liquid paper container is assembled as shown in FIG. It will be provided so as to go around the entire circumference of the body portion 10 of A. The position where the first scratch D is formed is the position where the body 10 and the top 20 are connected, that is, the rear surface plate 11 and the top forming plate 21, the side plate 12 and the top forming plate 22, the front plate 13 and the top forming plate 23. , The position of the horizontal fold rule for connecting the side plate 14 and the top forming plate 24 (hereinafter referred to as the horizontal fold rule for forming the top) and the horizontal fold rule for forming the top formed on the adhesive plate 15 connected thereto, or the said It can be provided within a range of 50 mm below the position of the horizontal folding rule for forming the top. A more preferable position is within a range of 35 mm below a position 15 mm or more away from the top forming horizontal folding rule. Further, it is preferable that the first scratch D has a C-shaped perforation shape in which the scratches are continuous. The C-shaped perforations are formed side by side along the horizontal folding rule for forming the top, and can be provided in several rows. The first scratch D can be provided by performing a half-cut process so as to extend from the polyolefin-based resin layer 1 laminated on the paper layer 2 to the paper layer 2.

本発明の液体用紙容器Ａを構成するブランクＢの積層体Ｃ、Ｃ’には第二の傷Ｅが横折罫（図４では左右方向）に平行して帯状に所定の幅を有し設けられている。第一の傷Ｄは、所定の幅で帯状に形成された第二の傷Ｅの領域内で厚み方向において重なる位置に配されている。また、第一の傷Ｄと同様に第二の傷Ｅは、後面板１１、側面板１２、前面板１３、側面板１４、接着板１５を跨ぎ、ブランクＢを横断して形成されており、組み立てると図１に示すように液体用紙容器Ａの胴部１０の全周に渡り一周するように設けられることになる。第二の傷Ｅの領域内に第一の傷Ｄが重なる位置であれば特に形成位置は限定されない。第二の傷Ｅが帯状とされることで所定の領域を備えるので第一の傷Ｄと第二の傷Ｅの位置合わせが容易となるものである。帯状に形成された第二の傷Ｅの幅（上下方向の長さ）は５〜２０ｍｍ程度である。第二の傷Ｅは所定の傷痕群の切刃を備えた傷痕群形成ロールを用いて基材層４ａに傷加工を施すことにより設けることができ、中間層４が積層される前に施すのがよい。 The second scratch E is provided on the laminated bodies C and C'of the blanks B constituting the liquid paper container A of the present invention in a strip shape parallel to the horizontal folding rule (horizontal direction in FIG. 4). Has been done. The first scratch D is arranged at an overlapping position in the thickness direction within the region of the second scratch E formed in a band shape with a predetermined width. Further, similarly to the first scratch D, the second scratch E is formed across the blank B across the rear face plate 11, the side plate 12, the front plate 13, the side plate 14, and the adhesive plate 15. When assembled, as shown in FIG. 1, the liquid paper container A is provided so as to go around the entire circumference of the body portion 10. The formation position is not particularly limited as long as the position where the first wound D overlaps within the region of the second wound E. Since the second scratch E has a band shape and has a predetermined area, the alignment of the first scratch D and the second scratch E becomes easy. The width (length in the vertical direction) of the second scratch E formed in a band shape is about 5 to 20 mm. The second scratch E can be provided by scratching the base material layer 4a using a scar group forming roll provided with a cutting edge of a predetermined scar group, and is provided before the intermediate layer 4 is laminated. Is good.

図４に示すブランクＢを、後面板１１と接着板１５とを熱接着して筒状に形成し、その後、後面板１１、側面板１２、前面板１３、側面板１４を縦折罫で折り曲げて四角筒状の胴部１０を形成し、底部形成板３１、３２、３３、３４を折罫で折り曲げ熱接着することにより底部３０を形成し、四角筒状の胴部１０の一方の開口された下端を閉塞する。上端より内容物を充填した後に、頂部形成板２１、２２、２３、２４を折罫で折り曲げて頂部２０を形成するとともに頂部形成板２１、２２、２３、２４及び接着板１５の上端に延設された頂部接着部２７’を熱接着することにより頂部接着部２７（図１参照）を形成し、胴部１０の上端を閉塞しゲーベルトップ型の液体用紙容器Ａが製造される。頂部形成板２２、２４には折罫が斜めに形成されているが、これは頂部形成板２２が折罫で折り込まれて頂部形成板２１に隣接する三角部分が頂部形成板２１に、頂部形成板２３に隣接する三角部分が頂部形成板２３にそれぞれ内面同志が重合され三角状の傾斜屋根を形成するものである。頂部形成板２４も同様に三角状の傾斜屋根が形成される。 The blank B shown in FIG. 4 is formed into a tubular shape by heat-bonding the rear surface plate 11 and the adhesive plate 15, and then the rear surface plate 11, the side plate 12, the front plate 13, and the side plate 14 are bent by vertical fold rules. The square tubular body 10 is formed, and the bottom forming plates 31, 32, 33, and 34 are bent by folding lines and heat-bonded to form the bottom 30, and one of the square tubular body 10 is opened. Close the lower end. After filling the contents from the upper end, the top forming plates 21, 22, 23, 24 are bent by a folding rule to form the top 20, and the top forming plates 21, 22, 23, 24 and the adhesive plate 15 are extended to the upper ends. The top adhesive portion 27'is heat-bonded to form the top adhesive portion 27 (see FIG. 1), and the upper end of the body portion 10 is closed to manufacture a Goebel top type liquid paper container A. Folded rules are formed diagonally on the top forming plates 22 and 24. This is because the top forming plate 22 is folded by the folding rule and the triangular portion adjacent to the top forming plate 21 is formed on the top forming plate 21. The triangular portion adjacent to the plate 23 forms a triangular inclined roof by superimposing the inner surfaces of the top forming plate 23 on each other. Similarly, a triangular inclined roof is formed on the top forming plate 24.

頂部接着部２７において、内面は接着性樹脂層６同志が相互に対向して熱接着され強接着とされているので手で開封することが困難な状態とされている。また、頂部形成板２１、２３に延設された頂部接着部２７’が頂部形成板２２、２４に延設された頂部接着部２７’より外方に延びて長くなるように設けられており頂部接着部２７の上端は頂部形成板２１、２３に延設された頂部接着部２７’の内面同志が直接熱接着される構成となっている。なお、注出口栓２６は内容物が充填される前の段階で注出口栓取付孔２５に例えば超音波シール法等により熱接着し取り付けられる。 In the top adhesive portion 27, the inner surface of the adhesive resin layers 6 is heat-bonded to each other so as to be strongly adhered to each other, so that it is difficult to open the seal by hand. Further, the top adhesive portion 27'extended to the top forming plates 21 and 23 is provided so as to extend outwardly and become longer than the top adhesive portion 27' extended to the top forming plates 22 and 24. The upper end of the bonding portion 27 has a configuration in which the inner surfaces of the top bonding portions 27'extended on the top forming plates 21 and 23 are directly heat-bonded to each other. The spout plug 26 is heat-bonded to the spout plug mounting hole 25 by, for example, an ultrasonic sealing method, before the contents are filled.

図５、図６は本発明に係る液体用紙容器の一実施形態の作用を示す説明図である。図５、図６を参照しながら本発明の液体用紙容器Ａの解体手順について説明する。液体用紙容器Ａ（図１参照）は、先ず、図５（イ）に示す頂部形成板２２の頂部折線２０ａ及び胴部折線１０ａを内側に折り畳み、頂部形成板２４についても同様に頂部折線２０ａ及び胴部折線１０ａを内側に折り畳む。 5 and 6 are explanatory views showing the operation of one embodiment of the liquid paper container according to the present invention. The procedure for disassembling the liquid paper container A of the present invention will be described with reference to FIGS. 5 and 6. The liquid paper container A (see FIG. 1) first folds the top folding line 20a and the body folding line 10a of the top forming plate 22 shown in FIG. 5 (a) inward, and similarly, the top forming plate 24 also has the top folding line 20a and the top folding line 20a. Fold the body folding line 10a inward.

次いで、図６（ロ）に示すように折り畳んだ状態とする。底部は図示しないが同様に胴部折線１０ａの下方の斜線近傍に親指を押し当てて、内方に押し込むことにより折り畳むことができる。 Next, it is in a folded state as shown in FIG. 6 (b). Although the bottom portion is not shown, the thumb can be similarly folded by pressing the thumb in the vicinity of the diagonal line below the body folding line 10a and pushing it inward.

一方の手で折り畳まれた胴部１０’、他方の手で折り畳まれた頂部２０’を掴み、胴部１０の全周に渡り形成された直線状の第一の傷Ｄを回動軸として図６（ロ）に示すように正転、逆転の動作を交互に繰り返すことにより、図６（ハ）に示すように直線状の第一の傷Ｄ及び第二の傷Ｅの部分で頂部２０’と胴部１０’に分離することができる。その後、頂部２０’の注出口栓２６の周囲を切り、取り注出口栓２６を分離する。今まで解体が困難であった液体用紙容器も本発明により、第一の傷Ｄ及び第二の傷Ｅを厚さ方向において同位置となるように設けたので頂部２０’が簡単に手で切り取ることができるようになり、使用後の空の液体用紙容器Ａ’の解体及び注出口栓２６の分別収集が容易となった。 The figure shows the linear first scratch D formed over the entire circumference of the body 10 by grasping the body 10'folded by one hand and the top 20' folded by the other hand as the rotation axis. By alternately repeating the forward and reverse operations as shown in 6 (b), the top 20'at the linear first scratch D and second scratch E as shown in FIG. 6 (c). And the body 10'can be separated. After that, the circumference of the spout plug 26 at the top 20'is cut to separate the take-out spout plug 26. According to the present invention, the liquid paper container, which has been difficult to disassemble until now, is provided so that the first scratch D and the second scratch E are at the same position in the thickness direction, so that the top 20'can be easily cut by hand. This has made it easier to disassemble the empty liquid paper container A'after use and to separate and collect the spout plug 26.

次に、本発明について、実施例を挙げてさらに詳しく説明する。
〔実施例１〕 Next, the present invention will be described in more detail with reference to examples.
[Example 1]

中間層４として片面にアルミニウム蒸着された厚さ１２μｍの二軸延伸ポリエチレンテレフタレートフィルムを用い、所定の傷痕群の刃型を備えた傷痕群形成ロールでアルミ蒸着された面の反対側の面の所定位置に傷加工を行い、第二の傷Ｅを設けた。傷加工はアルミニウム蒸着されたポリエチレンテレフタレートフィルムの巻取を繰り出しながら傷加工を行い流れ方向に帯状の第二の傷Ｅを設け巻き取った。第二の傷Ｅの流れ方向と直交する方向の幅は１０ｍｍ幅とした。 As the intermediate layer 4, a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm and aluminum-deposited on one side is used, and a predetermined surface opposite to the aluminum-deposited surface is formed by a scar group forming roll having a blade shape of a predetermined scar group. A scratch was processed at the position to provide a second scratch E. For the scratch processing, the scratch processing was performed while winding out the polyethylene terephthalate film vapor-deposited with aluminum, and a band-shaped second scratch E was provided in the flow direction and wound. The width in the direction orthogonal to the flow direction of the second scratch E was set to 10 mm.

紙層２に板紙３８２ｇ／ｍ² を用い、紙層２の一方の面と第二の傷Ｅを施した中間層４のアルミニウム蒸着面とを接着層３としてエチレン−メタクリル酸共重合体樹脂を用いＴダイ押出機により溶融押出しし厚さ２０μｍで設け、サンドラミネーションし、接着性樹脂層６として厚さ４０μｍの直鎖状低密度ポリエチレン樹脂の無延伸フィルムを用い、接着層５としてエチレン−メタクリル酸共重合体樹脂を用いＴダイ押出機により溶融押出しし厚さ２０μｍで設け、中間層４のアルミニウム蒸着面の反対側の面と接着性樹脂層６とを接着層５でサンドラミネーションした。 Methacrylic acid copolymer resin - paperboard 382 g / m ² using the paper layer 2, ethylene and aluminum deposited surface of the intermediate layer 4 which has been subjected to one side and a second wound E of the paper layer 2 as an adhesive layer 3 It was melt-extruded by the T-die extruder used and provided with a thickness of 20 μm, sand-laminated, and a non-stretched film of a linear low-density polyethylene resin with a thickness of 40 μm was used as the adhesive resin layer 6, and ethylene-methacryl was used as the adhesive layer 5. An acid copolymer resin was melt-extruded by a T-die extruder to a thickness of 20 μm, and the surface of the intermediate layer 4 opposite to the aluminum vapor deposition surface and the adhesive resin layer 6 were sand-laminated by the adhesive layer 5.

つぎに紙層２の他方の面に低密度ポリエチレン樹脂をＴダイ押出機により溶融押出しし、厚さ２５μｍのポリオレフィン系樹脂層１を積層した。なお、紙層２のポリオレフィン系樹脂層１側の面にはアンカーコートを積層時に施し、ポリオレフィン系樹脂層１の表出面には印刷適性を向上させるためコロナ処理を積層時にそれぞれ施し積層体Ｃを作製した。 Next, a low-density polyethylene resin was melt-extruded on the other surface of the paper layer 2 by a T-die extruder, and a polyolefin-based resin layer 1 having a thickness of 25 μm was laminated. An anchor coat is applied to the surface of the paper layer 2 on the side of the polyolefin resin layer 1 at the time of lamination, and a corona treatment is applied to the exposed surface of the polyolefin resin layer 1 at the time of lamination to obtain the laminate C. Made.

その後、積層体Ｃのポリオレフィン系樹脂層１のコロナ処理面に印刷機で第二の傷Ｅが所定位置になるように見当合わせして絵柄、文字等の印刷を施し、所定の切刃、押罫、胴部折線１０ａ、頂部折線２０ａを備えた打ち抜き型で打ち抜き、図４に示すブランクを作製した。第一の傷Ｄは打ち抜きと同時にハーフカット刃でポリオレフィン系樹脂層１から紙層２に渡るハーフカットを第二の傷Ｅに見当を合わせて直線状に施した。なお、直線状に設けた第一の傷Ｄの位置は、後面板１１と頂部形成板２１、側面板１２と頂部形成板２２、前面板１３と頂部形成板２３、側面板１４と頂部形成板２４を連接する頂部形成用横折罫より２０ｍｍ下方の胴部１０側とし、後面板１１、側面板１２、前面板１３、側面板１４、接着板１５に設けた。 After that, a pattern, characters, etc. are printed on the corona-treated surface of the polyolefin-based resin layer 1 of the laminate C by registering the second scratch E at a predetermined position with a printing machine, and then printing a predetermined cutting edge and pressing. A blank shown in FIG. 4 was produced by punching with a punching die provided with a ruled line, a body folding line 10a, and a top folding line 20a. At the same time as punching the first scratch D, a half cut extending from the polyolefin resin layer 1 to the paper layer 2 was linearly applied to the second scratch E with a half-cut blade. The positions of the first scratches D provided in a straight line are the rear face plate 11 and the top forming plate 21, the side plate 12 and the top forming plate 22, the front plate 13 and the top forming plate 23, and the side plate 14 and the top forming plate. The 24 was provided on the rear surface plate 11, the side plate 12, the front plate 13, the side plate 14, and the adhesive plate 15 so as to be on the body 10 side 20 mm below the top forming horizontal folding rule to be connected.

その後、製函機を用いて側面板１２と前面板１３の間に施されたブランクＢの上端から下端に至る縦折罫（図４の上下方向）及び側面板１４と接着板１５の間に施されたブランクＢの上端から下端に至る縦折罫で折り曲げて接着板１５の外面と後面板１１の内面とをフレームで炙り熱接着し、側面板１２と前面板１３の間及び側面板１４と接着板１５の間で折り畳まれたスリーブ状に製函した。また、接着板１５にはスカイブ・ヘミング加工を施しブランクＢの端面が内容物と接することがないように端面処理を施した。 After that, a vertical folding rule (vertical direction in FIG. 4) from the upper end to the lower end of the blank B provided between the side plate 12 and the front plate 13 using a box making machine and between the side plate 14 and the adhesive plate 15. The outer surface of the adhesive plate 15 and the inner surface of the rear surface plate 11 are heat-bonded by bending with a vertical folding rule from the upper end to the lower end of the blank B, and the space between the side plate 12 and the front plate 13 and the side plate 14 are bonded. The box was made into a sleeve shape folded between the adhesive plate 15 and the adhesive plate 15. Further, the adhesive plate 15 was subjected to skive hemming processing so that the end surface of the blank B would not come into contact with the contents.

そして、製函されたスリーブ状の液体用紙容器を起函させ、注出口栓２６を注出口栓取付孔２５に取り付け組み立てて図１に示す液体用紙容器Ａを作製した。 Then, the box-made sleeve-shaped liquid paper container was opened, and the spout plug 26 was attached to the spout plug mounting hole 25 and assembled to prepare the liquid paper container A shown in FIG.

〔実施例２〕
中間層４として厚さ１２μｍの二軸延伸ポリエチレンテレフタレートフィルムの片面に酸化珪素を蒸着したフィルムを用いた以外は実施例１と同様とした。 [Example 2]
The same as in Example 1 was carried out except that a film in which silicon oxide was vapor-deposited on one side of a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm was used as the intermediate layer 4.

〔実施例３〕
中間層４として基材層４ａに厚さ１２μｍの二軸延伸ポリエチレンテレフタレートフィルムを用い、バリア層４ｃに厚さ７μｍのアルミニウム箔を用い、ウレタン系２液硬化型ドライラミネート接着剤を用いてドライラミネーション法で積層したものを使用した以外は実施例１と同様とした。なお、バリア層４ｃのアルミニウム箔は接着層３側とした。 [Example 3]
As the intermediate layer 4, a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm is used for the base material layer 4a, an aluminum foil having a thickness of 7 μm is used for the barrier layer 4c, and dry lamination is performed using a urethane-based two-component curable dry laminate adhesive. It was the same as in Example 1 except that the one laminated by the method was used. The aluminum foil of the barrier layer 4c was on the adhesive layer 3 side.

〔実施例４〕
中間層４に実施例１の第二の傷Ｅが施された片面にアルミニウム蒸着された厚さ１２μｍの二軸延伸ポリエチレンテレフタレートフィルムを用い、接着性樹脂層６に厚さ６０μｍの低密度ポリエチレン樹脂の無延伸フィルムを用い、先に中間層４のアルミニウム蒸着面と接着性樹脂層６をウレタン系２液硬化型ドライラミネート接着剤を用いてドライラミネーション法で積層した以外は実施例１と同様にした。 [Example 4]
A low-density polyethylene resin having a thickness of 60 μm was used on the adhesive resin layer 6 using a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm and aluminum vapor-deposited on one side of the intermediate layer 4 having the second scratch E of Example 1. The same as in Example 1 except that the aluminum-deposited surface of the intermediate layer 4 and the adhesive resin layer 6 were first laminated by the dry lamination method using a urethane-based two-component curable dry-laminate adhesive. did.

〔実施例５〕
中間層４に実施例２の第二の傷Ｅが施された片面に酸化珪素を蒸着した厚さ１２μｍの二軸延伸ポリエチレンテレフタレートフィルムを用い、接着性樹脂層６に厚さ６０μｍの低密度ポリエチレン樹脂の無延伸フィルムを用い、先に中間層４の酸化珪素蒸着面と接着性樹脂層６をウレタン系２液硬化型ドライラミネート接着剤を用いてドライラミネーション法で積層した以外は実施例１と同様にした。 [Example 5]
A 12 μm-thick biaxially stretched polyethylene terephthalate film in which silicon oxide is vapor-deposited on one side of the intermediate layer 4 in which the second scratch E of Example 2 is provided is used, and a low-density polyethylene having a thickness of 60 μm is used on the adhesive resin layer 6. Example 1 except that the silicon oxide vapor-deposited surface of the intermediate layer 4 and the adhesive resin layer 6 were first laminated by the dry lamination method using a urethane-based two-component curable dry-laminated adhesive using a resin non-stretched film. I did the same.

〔実施例６〕
中間層４に実施例３の第二の傷Ｅが施された厚さ１２μｍの二軸延伸ポリエチレンテレフタレートフィルムと厚さ７μｍのアルミニウム箔の積層体を用い、接着性樹脂層６に厚さ６０μｍの低密度ポリエチレン樹脂の無延伸フィルムを用い、先に中間層４の二軸延伸ポリエチレンテレフタレートフィルム面と接着性樹脂層６をウレタン系２液硬化型ドライラミネート接着剤を用いてドライラミネーション法で積層した以外は実施例１と同様にした。 [Example 6]
Using a laminated body of a 12 μm-thick biaxially stretched polyethylene terephthalate film in which the second scratch E of Example 3 was applied to the intermediate layer 4 and a 7 μm-thick aluminum foil, the adhesive resin layer 6 was 60 μm thick. Using a low-density polyethylene resin non-stretched film, the biaxially stretched polyethylene terephthalate film surface of the intermediate layer 4 and the adhesive resin layer 6 were first laminated by a dry lamination method using a urethane-based two-component curable dry laminate adhesive. Other than that, it was the same as in Example 1.

〔比較例１〕
中間層４に第二の傷Ｅを設けなかった以外は実施例１と同様にした。 [Comparative Example 1]
The same procedure as in Example 1 was carried out except that the second scratch E was not provided on the intermediate layer 4.

〔比較例２〕
ポリオレフィン系樹脂層１及び紙層２に第一の傷Ｄを設けなかった以外は実施例１と同様にした。 [Comparative Example 2]
The same procedure as in Example 1 was carried out except that the first scratch D was not provided on the polyolefin resin layer 1 and the paper layer 2.

上記で作製した実施例１〜６、及び比較例１、２の液体用紙容器について前記解体方法で解体性を評価したところ、実施例１〜６の液体用紙容器については往復折り曲げ操作を数回繰り返すと頂部と胴部に分離することができた。比較例１、２の液体用紙容器では折り曲げ操作を往復２０回繰り返しても分離不可能であった。 When the dismantling property of the liquid paper containers of Examples 1 to 6 and Comparative Examples 1 and 2 produced above was evaluated by the disassembling method, the reciprocating bending operation was repeated several times for the liquid paper containers of Examples 1 to 6. And could be separated into the top and the torso. In the liquid paper containers of Comparative Examples 1 and 2, separation was not possible even if the bending operation was repeated 20 times back and forth.

Ａ、Ａ’ 液体用紙容器
Ｂブランク
Ｃ、Ｃ’ 積層体
Ｄ第一の傷
Ｅ、Ｅ’、Ｅ’’ 第二の傷
ｅ１、ｅ２、ｅ３傷痕群
ｅ１’、ｅ２’ 、ｅ３’ 傷痕
１ポリオレフィン系樹脂層
２紙層
３、５接着層
４中間層
４ａ基材層
４ｂ、４ｃバリア層
６接着性樹脂層
１０、１０’ 胴部
１０ａ胴部折線
１１後面板
１２、１４側面板
１３前面板
１５接着板
２０、２０’ 頂部
２０ａ頂部折線
２１、２２、２３、２４頂部形成板
２５注出口栓取付孔
２６注出口栓
２７、２７’ 頂部接着部
３０底部
３１、３２、３３、３４底部形成板 A, A'Liquid paper container B Blank C, C'Laminated body D First scratch E, E', E'' Second scratch e1, e2, e3 Scar group e1', e2', e3'Scar 1 Polyethylene Resin layer 2 Paper layer 3, 5 Adhesive layer 4 Intermediate layer 4a Base material layer 4b, 4c Barrier layer 6 Adhesive resin layer 10, 10'Body part 10a Body part folding line 11 Rear face plate 12, 14 Side plate 13 Front plate 15 Adhesive plate 20, 20'Top 20a Top folding line 21, 22, 23, 24 Top forming plate 25 Injection / exit plug mounting hole 26 Injection / exit plug 27, 27'Top adhesive 30 Bottom 31, 32, 33, 34 Bottom forming plate

Claims

厚さ方向にポリオレフィン系樹脂層、紙層、中間層、接着性樹脂層を備えた積層体で構成され、前面板と後面板と両側面板が連接状態の筒状の胴部と、前記前面板と前記後面板と前記両側面板に連接状態の頂部形成板で前記胴部の上端を閉塞する頂部と、前記前面板と前記後面板と前記両側面板に連接状態の底部形成板で前記胴部の下端を閉塞する底部からなるゲーベルトップ型の液体用紙容器であって、
前記ポリオレフィン系樹脂層から前記紙層に渡る第一の傷を有し、
前記第一の傷の深さは、前記紙層の厚さ方向に前記ポリオレフィン系樹脂層の側から前記紙層の厚さの１／２以上であり、
前記第一の傷の形成位置は、前記頂部と前記胴部を連接する稜線より下方に１５ｍｍ乃至５０ｍｍの範囲内であり、
前記中間層は蒸着層からなるバリア層と基材層を備え、前記蒸着層は前記紙層の側に位置しており、前記基材層は傷痕群からなる第二の傷を有し、
前記傷痕群は、微細な切目からなり３列以上の複数列からなる領域を有しており、
前記第一の傷と前記第二の傷が厚さ方向において略同位置に配されていることを特徴とする液体用紙容器。 It is composed of a laminate having a polyolefin resin layer, a paper layer, an intermediate layer, and an adhesive resin layer in the thickness direction, and has a tubular body in which a front plate, a rear surface plate, and both side plates are connected to each other, and the front plate. And the top plate that closes the upper end of the body with the top forming plate that is connected to the rear surface plate and both side plates, and the bottom forming plate that is connected to the front plate, the rear surface plate, and both side plates of the body. A gobel-top type liquid paper container consisting of a bottom that closes the lower end.
It has a first scratch extending from the polyolefin-based resin layer to the paper layer,
The depth of the first scratch is ½ or more of the thickness of the paper layer from the side of the polyolefin resin layer in the thickness direction of the paper layer.
The position of forming the first scratch is within a range of 15 mm to 50 mm below the ridgeline connecting the top and the body.
The intermediate layer includes a barrier layer composed of a vapor-deposited layer and a base material layer, the vapor-deposited layer is located on the side of the paper layer, and the base material layer has a second scratch composed of a scar group.
The scar group is composed of fine cuts and has a region consisting of a plurality of rows of three or more rows.
A liquid paper container characterized in that the first scratch and the second scratch are arranged at substantially the same position in the thickness direction.

前記第一の傷及び前記第二の傷が前記前面板、前記後面板、及び前記両側面板を跨ぎ、前記胴部の全周に延びる線状に設けられていることを特徴とする請求項１に記載の液体用紙容器。 Claim 1 is characterized in that the first scratch and the second scratch are provided in a linear shape extending over the entire circumference of the body portion across the front plate, the rear surface plate, and both side surface plates. Liquid paper container described in.

前記胴部の両側面板及び前記両側面板に連接する前記頂部の頂部形成板の中央部にそれぞれ、前記胴部を折り畳むための胴部折線及び前記頂部を折り畳むための頂部折線が設けられていることを特徴とする請求項１または請求項２に記載の液体用紙容器。 A body folding line for folding the body and a top folding line for folding the top are provided at the center of both side plates of the body and the top forming plate of the top connected to the both side plates, respectively. The liquid paper container according to claim 1 or 2.