JP2021187447A - Packaging container - Google Patents

Packaging container Download PDF

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Publication number
JP2021187447A
JP2021187447A JP2020091539A JP2020091539A JP2021187447A JP 2021187447 A JP2021187447 A JP 2021187447A JP 2020091539 A JP2020091539 A JP 2020091539A JP 2020091539 A JP2020091539 A JP 2020091539A JP 2021187447 A JP2021187447 A JP 2021187447A
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Japan
Prior art keywords
flange
sheet material
film
packaging container
adhesive strength
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JP2020091539A
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JP7508861B2 (en
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俊輔 矢島
Shunsuke Yajima
征記 三好
Masaki Miyoshi
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Toppan Inc
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Toppan Printing Co Ltd
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Abstract

To provide a packaging container formed by bending a sheet material and capable of easily retaining a shape.SOLUTION: The packaging container is formed by a sheet material and comprises a frame-shaped flange having the sheet material continuous on the entire circumference. A side surface and a bottom surface are formed by a part of the sheet material extending from the inner edge of the flange and a part extending from the outer edge. In particular, the flange is rectangular, the side surface includes two first side surfaces formed by parts respectively extending from the inner edges of the two opposing sides of the flange of the sheet material and two side surfaces formed by parts respectively extending from the outer edges of the other two opposing sides of the flange of the sheet material. The bottom surface includes four parts, i.e., the parts respectively extending from the first side surfaces of the sheet material and parts respectively extending from the second side surfaces.SELECTED DRAWING: Figure 2

Description

本発明は、包装容器に関する。 The present invention relates to a packaging container.

紙を主成分とするシート材を折り曲げてトレイ形状とし、フィルムを被覆し、シート材の周縁を折り寄せてつなぎ合わせたフランジ部分に蓋材をシールした包装容器が知られている(特許文献1参照)。 There is known a packaging container in which a sheet material containing paper as a main component is bent into a tray shape, a film is coated, and a lid material is sealed on a flange portion in which the peripheral edges of the sheet material are folded and joined together (Patent Document 1). reference).

国際公開第2019/177652号International Publication No. 2019/177652

折り曲げられたシート材は、もとの平坦な形状に戻ろうとする傾向があるため、折り曲げられたシート材で構成された包装容器は形状が崩れやすい。包装容器の形状を好適に保持するための検討は十分なされていなかった。 Since the folded sheet material tends to return to the original flat shape, the packaging container made of the bent sheet material tends to lose its shape. Sufficient studies have not been made to adequately maintain the shape of the packaging container.

本発明はこのような課題に鑑みてなされたものであり、シート材を折り曲げて形成され、形状を維持しやすい包装容器を提供することを目的とする。 The present invention has been made in view of such a problem, and an object of the present invention is to provide a packaging container which is formed by bending a sheet material and whose shape can be easily maintained.

上記課題を解決するための本発明の一局面は、シート材で形成された包装容器であって、シート材が全周において連続する枠形状のフランジを備え、シート材のフランジの内縁から延伸する部分と、外縁から延伸する部分とによって、側面および底面が構成される、包装容器である。 One aspect of the present invention for solving the above problems is a packaging container made of a sheet material, wherein the sheet material has a frame-shaped flange that is continuous all around the circumference and extends from the inner edge of the flange of the sheet material. A packaging container whose sides and bottom are composed of a portion and a portion extending from the outer edge.

本発明によれば、フランジの全周にわたってシート材が連続しているので、包装容器の強度が高く、包装容器の形状を維持しやすくすることができる。 According to the present invention, since the sheet material is continuous over the entire circumference of the flange, the strength of the packaging container is high, and it is possible to easily maintain the shape of the packaging container.

本発明の一実施形態に係るシート材ブランクの平面図Plan view of sheet material blank which concerns on one Embodiment of this invention 本発明の一実施形態に係る折り畳まれたシート材の平面図および底面図A plan view and a bottom view of a folded sheet material according to an embodiment of the present invention. 本発明の一実施形態に係る容器本体の平面図、側面図、正面図および底面図Plan view, side view, front view and bottom view of the container body according to the embodiment of the present invention. 本発明の一実施形態に係るフランジとその周辺の部分拡大断面図Partially enlarged cross-sectional view of the flange and its periphery according to the embodiment of the present invention.

(実施形態)
本発明の一実施形態に係る包装容器の容器本体は、1枚のシート材を折り曲げて形成される。シート材は例えば紙を主成分とする。図1に、板紙を打ち抜いた平坦なブランク状態のシート材10の平面図を示す。図1には、シート材10の輪郭とシート材10に設けられた切り込みとを実線で示し、折られる部分を点線で示す。
(Embodiment)
The container body of the packaging container according to the embodiment of the present invention is formed by bending one sheet material. The sheet material is mainly composed of, for example, paper. FIG. 1 shows a plan view of a flat blank sheet material 10 punched out from paperboard. In FIG. 1, the outline of the sheet material 10 and the notch provided in the sheet material 10 are shown by a solid line, and the folded portion is shown by a dotted line.

シート材10は、容器本体のフランジ11、第1側面13、第2側面12、底面14、15となる部分を有する。フランジ11は、全周において連続する矩形の枠形状を有する。すなわちフランジ11は、全周にわたって分離することなく、ひとつながりのシート材によって構成されている。フランジ11の対向する2辺の内縁から2つの第1側面13がそれぞれ延伸し、各第1側面13には底面15が接続する。フランジ11の対向する他の2辺の外縁から2つの接着代11’がそれぞれ延伸し、各接着代11’には、第2側面12および底面14が接続する。 The sheet material 10 has a portion serving as a flange 11, a first side surface 13, a second side surface 12, and bottom surfaces 14 and 15 of the container body. The flange 11 has a rectangular frame shape that is continuous all around. That is, the flange 11 is made of a continuous sheet material without being separated over the entire circumference. Two first side surfaces 13 extend from the inner edges of the two opposing sides of the flange 11, and a bottom surface 15 is connected to each first side surface 13. Two adhesive margins 11'stretch from the outer edges of the other two opposite sides of the flange 11, respectively, and the second side surface 12 and the bottom surface 14 are connected to each adhesive margin 11'.

底面15の外縁には、突出する形状のツメ17と、切り込み19とが形成されている。第2側面12と底面14との接続箇所には切り込み16が形成されている。また、底面14の外縁には、突出する形状のツメ18が形成されている。 A claw 17 having a protruding shape and a notch 19 are formed on the outer edge of the bottom surface 15. A notch 16 is formed at the connection point between the second side surface 12 and the bottom surface 14. Further, a claw 18 having a protruding shape is formed on the outer edge of the bottom surface 14.

図2の(a)、(b)に、折り畳まれた状態のシート材20の平面図および底面図をそれぞれ示す。シート材20は、シート材10を、フランジ11と接着代11’との境界で折り返し、フランジ11と接着代11’とを接着することによって形成される。図2の(b)に接着する領域を斜線で示す。製函工程の実行までは、嵩張らない形状に形成されたシート材20が保管、輸送される。 (A) and (b) of FIG. 2 show a plan view and a bottom view of the sheet material 20 in a folded state, respectively. The sheet material 20 is formed by folding back the sheet material 10 at the boundary between the flange 11 and the adhesive margin 11'and adhering the flange 11 and the adhesive margin 11'. The area to be adhered to (b) in FIG. 2 is shown by diagonal lines. Until the execution of the box-making process, the sheet material 20 formed in a non-bulky shape is stored and transported.

製函工程において、図2の(a)に示すシート材20の中央部分を、紙面奥に押しこむように、シート材20を折り曲げて、第1側面13、第2側面12を傾斜させ側面とし、底面14と底面15とを部分的に重ね合わせて底面とする。図3の(a)、(b)、(c)、(d)に製函された容器本体30の平面図、側面図、正面図および底面図をそれぞれ示す。容器本体30においては、切り込み16にツメ17が係合し、切り込み19にツメ18が係合し、製函された形状が一定程度安定的に維持される。 In the box-making process, the sheet material 20 is bent so that the central portion of the sheet material 20 shown in FIG. 2A is pushed into the back of the paper surface, and the first side surface 13 and the second side surface 12 are inclined to form side surfaces. The bottom surface 14 and the bottom surface 15 are partially overlapped to form a bottom surface. A plan view, a side view, a front view, and a bottom view of the container main body 30 manufactured in the boxes (a), (b), (c), and (d) of FIG. 3 are shown, respectively. In the container body 30, the claw 17 engages with the notch 16, and the claw 18 engages with the notch 19, so that the boxed shape is maintained to a certain degree of stability.

第1側面13、第2側面12、底面14、15によって構成される容器本体30の内面の少なくとも一部と、フランジ11の上面とには、真空成型等によって、フィルムが積層され、これにより、容器本体30の側面や底面の隙間が塞がれ、耐水性、耐油性あるいは形状保持性が向上する。なお、フィルムを剥離可能とすれば、包装容器の使用後に、フィルムと、フィルムを除去した容器本体30とを分別して処分することができ、環境負荷を低減できる。フィルムは単層でもよく多層の積層体でもよい。 A film is laminated on at least a part of the inner surface of the container body 30 composed of the first side surface 13, the second side surface 12, the bottom surface 14, and 15 and the upper surface of the flange 11 by vacuum forming or the like. The gaps on the side surfaces and the bottom surface of the container body 30 are closed, and water resistance, oil resistance, and shape retention are improved. If the film can be peeled off, the film and the container body 30 from which the film has been removed can be separated and disposed of after the packaging container is used, and the environmental load can be reduced. The film may be a single layer or a multi-layered laminate.

内容物を充填後、フランジ11上面のフィルムに蓋材をシールすることにより、容器本体30が封止される。 After filling the contents, the container body 30 is sealed by sealing the lid material on the film on the upper surface of the flange 11.

このように、本実施形態においては、フランジ11上面の全周にわたってシート材が連続しているので、フランジ11上面を平坦な状態に維持しやすく、フィルムや蓋材を積層しやすい。また、フランジ11は、複数の部分を寄せ集めて形成したフランジに比べて変形、分離しにくく、輸送時の振動等によってフィルムや蓋材が意図せず剥離するおそれを低減できる。また、このようにフランジ11の変形、分離がしにくいことにより、容器本体30全体の強度も高く、形状保持性に優れる。 As described above, in the present embodiment, since the sheet material is continuous over the entire circumference of the upper surface of the flange 11, the upper surface of the flange 11 can be easily maintained in a flat state, and the film and the lid material can be easily laminated. Further, the flange 11 is less likely to be deformed and separated as compared with a flange formed by gathering a plurality of portions, and the possibility that the film or the lid material is unintentionally peeled off due to vibration during transportation or the like can be reduced. Further, since the flange 11 is difficult to be deformed and separated in this way, the strength of the entire container body 30 is high and the shape retention is excellent.

上述したツメ17、18、切り込み16、19のような係合機構を設けることによっても、形状保持性を向上することができる。係合機構の態様は、上述のものに限定されない。また、係合機構はなくてもよい。 The shape retention can also be improved by providing an engaging mechanism such as the claws 17, 18 and the cuts 16 and 19 described above. The mode of the engagement mechanism is not limited to the above. Further, the engagement mechanism may not be provided.

シート材には、例えば坪量40g/m以上500g/m以下の板紙を使用することができるが、加工の適正およびコストの観点で、坪量190g/m以上400g/m以下、とくに坪量190g/m以上350.1g/m以下の板紙を使用することが好ましい。また、シート材は紙以外の層を含む積層体でもよいが、紙を重量比で最大の成分とすることが好ましい。 The sheet material, for example a basis weight 40 g / m 2 or more 500 g / m 2 or less of paperboard may be used, in terms of the proper and cost of processing, basis weight 190 g / m 2 or more 400 g / m 2 or less, it is particularly preferable to use a basis weight 190 g / m 2 or more 350.1g / m 2 or less of paperboard. Further, the sheet material may be a laminate containing a layer other than paper, but it is preferable that paper is the largest component in terms of weight ratio.

図1に示すシート材10のブランクのように、窓抜き部分を設けないようにすると、窓抜き作業が不要となりサックマシン等による作業の高速化ができる。また、シート材10の切り込みに適宜つなぎを設けてもよい。つなぎを設けると、高速でフィーダー切り出しやベルト搬送を行ってもシート材の切り込みからのめくれによる歪みを抑制することができる。 If the window punching portion is not provided as in the blank of the sheet material 10 shown in FIG. 1, the window punching work becomes unnecessary and the work speed can be increased by a sack machine or the like. Further, a joint may be appropriately provided in the notch of the sheet material 10. By providing a joint, it is possible to suppress distortion due to turning over from the notch of the sheet material even when the feeder is cut out or the belt is conveyed at high speed.

シート材10における、側面や底面となる部分の配置および構成は、図1に示すものに限定されず、フランジ11が全周にわたって連続するように形成できれば、適宜変形してよい。 The arrangement and configuration of the side surface and bottom surface portions of the sheet material 10 are not limited to those shown in FIG. 1, and may be appropriately deformed as long as the flange 11 can be formed so as to be continuous over the entire circumference.

図4に、フィルム40および蓋材50を設けたフランジ11とその周辺の部分拡大断面図を模式的に示す。フランジ11とフランジ11に積層されたフィルム40との接着強度aは、例えばフランジ11に積層されたフィルム40と蓋材50との接着強度cより高いことが好ましい。すなわちa>cであることによって、開封時に、蓋材50とフィルム40との間の剥離を、フランジ11とフィルム40との間の剥離を抑制しつつ行うことができ、好適な開封が可能となる。 FIG. 4 schematically shows a partially enlarged cross-sectional view of the flange 11 provided with the film 40 and the lid material 50 and the periphery thereof. The adhesive strength a between the flange 11 and the film 40 laminated on the flange 11 is preferably higher than, for example, the adhesive strength c between the film 40 laminated on the flange 11 and the lid material 50. That is, when a> c, the peeling between the lid material 50 and the film 40 can be performed while suppressing the peeling between the flange 11 and the film 40 at the time of opening, and suitable opening is possible. Become.

また、容器本体30の内面と、内面に積層されたフィルム40との接着強度bは、例えばフランジ11とフランジ11に積層されたフィルム40との接着強度aより低いことが好ましい。すなわちa>bであることによって、端縁保護のため比較的高い接着強度が要求されるフランジ11部分以外は、フィルム40を容易に剥離でき、好適な分別作業が可能となる。 Further, it is preferable that the adhesive strength b between the inner surface of the container body 30 and the film 40 laminated on the inner surface is lower than, for example, the adhesive strength a between the flange 11 and the film 40 laminated on the flange 11. That is, when a> b, the film 40 can be easily peeled off except for the flange 11 portion where relatively high adhesive strength is required for edge protection, and suitable sorting work becomes possible.

接着強度aは、例えば1N/15mm以上10N/15mm以下が好ましく、とくに3N/15mm以上7N/15mm以下が好ましい。接着強度が小さすぎると輸送時等にフィルム40の剥離が発生するおそれがあり、大きすぎると分別のための剥離がしにくくなる。 The adhesive strength a is preferably 1N / 15 mm or more and 10N / 15 mm or less, and particularly preferably 3N / 15 mm or more and 7N / 15 mm or less. If the adhesive strength is too small, the film 40 may be peeled off during transportation or the like, and if it is too large, it becomes difficult to peel off for sorting.

接着強度bは、例えば、上述のようにa>bを満たしつつ、0.5N/15mm以上6N/15mm以下が好ましく、とくに2N/15mm以上5N/15mm以下が好ましい。接着強度が小さすぎると輸送時等にフィルム40の剥離が発生するおそれがあり、大きすぎると分別のための剥離がしにくくなる。 The adhesive strength b is, for example, preferably 0.5 N / 15 mm or more and 6 N / 15 mm or less, and particularly preferably 2 N / 15 mm or more and 5 N / 15 mm or less while satisfying a> b as described above. If the adhesive strength is too small, the film 40 may be peeled off during transportation or the like, and if it is too large, it becomes difficult to peel off for sorting.

接着強度の差異を設ける方法は限定されないが、例えば、シーラント、剥離ニス、ヒートシール材を使い分けたり、量や加工温度を変更したりする方法が挙げられる。 The method of providing the difference in the adhesive strength is not limited, and examples thereof include a method of using a sealant, a peeling varnish, and a heat sealing material properly, and a method of changing the amount and the processing temperature.

本実施形態に係る容器本体30にフィルム40を積層し、フランジ11に蓋材50をシールして、包装容器を作成し評価を行った。 The film 40 was laminated on the container body 30 according to the present embodiment, the lid material 50 was sealed on the flange 11, and a packaging container was prepared and evaluated.

(実施例1)
蓋材50の層構成は包装容器の外側から順に以下のとおりであり、容器本体30にフィルム40を積層した積層体の層構成は包装容器の内側から順に以下のとおりである。また、上述の接着強度a、b、cは以下のとおりである。
蓋材:PET(ポリエチレンテレフタレート)12μm/EP(イージーピール)シーラントA30μm
積層体(フランジ):PE(ポリエチレン)30μm/sPE(サンドラミポリエチレン)15μm/紙310g
積層体(内面):PE30μm/sPE15μm/剥離ニス/紙310g
接着強度a、b、c:5、3、3(N/15mm)
(Example 1)
The layer structure of the lid material 50 is as follows in order from the outside of the packaging container, and the layer structure of the laminated body in which the film 40 is laminated on the container body 30 is as follows in order from the inside of the packaging container. Further, the above-mentioned adhesive strengths a, b, and c are as follows.
Cover material: PET (polyethylene terephthalate) 12 μm / EP (easy peel) sealant A 30 μm
Laminated body (flange): PE (polyethylene) 30 μm / sPE (sandrami polyethylene) 15 μm / paper 310 g
Laminated body (inner surface): PE 30 μm / sPE 15 μm / peeling varnish / paper 310 g
Adhesive strength a, b, c: 5, 3, 3 (N / 15 mm)

(実施例2)
蓋材:透明蒸着PET12μm/EPシーラントA30μm
積層体(フランジ):PE系バリア多層50μm/sPE18μm/紙310g
積層体(内面):PE系バリア多層50μm/sPE18μm/剥離ニス/紙310g
接着強度a、b、c:5、2、1(N/15mm)
(Example 2)
Closure: Transparent-film PET 12 μm / EP sealant A 30 μm
Laminated body (flange): PE-based barrier multilayer 50 μm / sPE 18 μm / paper 310 g
Laminated body (inner surface): PE-based barrier multilayer 50 μm / sPE 18 μm / peeling varnish / paper 310 g
Adhesive strength a, b, c: 5, 2, 1 (N / 15 mm)

(実施例3)
蓋材:透明蒸着PET12μm/EPシーラントA30μm
積層体(フランジ):PE系バリア多層50μm/sPE18μm/紙310g
積層体(内面):PE系バリア多層50μm/sPE18μm/剥離ニス/紙310g
接着強度a、b、c:1、0.5、0.7(N/15mm)
(Example 3)
Closure: Transparent-film PET 12 μm / EP sealant A 30 μm
Laminated body (flange): PE-based barrier multilayer 50 μm / sPE 18 μm / paper 310 g
Laminated body (inner surface): PE-based barrier multilayer 50 μm / sPE 18 μm / peeling varnish / paper 310 g
Adhesive strength a, b, c: 1, 0.5, 0.7 (N / 15mm)

(実施例4)
蓋材:PET12μm/EPシーラントA30μm
積層体(フランジ):PE30μm/粘着剤/紙310g
積層体(内面):PE30μm/粘着剤/剥離ニス/紙310g
接着強度a、b、c:2、1、1(N/15mm)
(Example 4)
Cover material: PET 12 μm / EP sealant A 30 μm
Laminated body (flange): PE 30 μm / adhesive / paper 310 g
Laminated body (inner surface): PE 30 μm / adhesive / peeling varnish / paper 310 g
Adhesive strength a, b, c: 2, 1, 1 (N / 15 mm)

(実施例5)
蓋材:PET12μm/EPシーラントC30μm
積層体(フランジ):HS(ヒートシーラブル)−PET30μm/紙221g
積層体(内面):HS−PET30μm/剥離ニス/紙221g
接着強度a、b、c:7、5、3(N/15mm)
(Example 5)
Cover material: PET 12 μm / EP sealant C 30 μm
Laminated body (flange): HS (heat sealable) -PET 30 μm / paper 221 g
Laminated body (inner surface): HS-PET 30 μm / peeling varnish / paper 221 g
Adhesive strength a, b, c: 7, 5, 3 (N / 15 mm)

(実施例6)
蓋材:透明蒸着PET12μm/NY(ナイロン)15μm/EPシーラントB30μm
積層体(フランジ):PP(ポリプロピレン)系バリア多層50μm/sCPP(サンドラミ無延伸ポリプロピレン)18μm/紙310g
積層体(内面):PP系バリア多層50μm/sCPP18μm/剥離ニス/紙310g
接着強度a、b、c:3、1、1(N/15mm)
(Example 6)
Cover material: Transparent-film PET 12 μm / NY (nylon) 15 μm / EP sealant B 30 μm
Laminated body (flange): PP (polypropylene) barrier multilayer 50 μm / s CPP (sandrami unstretched polypropylene) 18 μm / paper 310 g
Laminated body (inner surface): PP barrier multilayer 50 μm / sCPP 18 μm / peeling varnish / paper 310 g
Adhesive strength a, b, c: 3, 1, 1 (N / 15 mm)

(実施例7)
蓋材:PET12μm/EPシーラントA30μm
積層体(フランジ):PE30μm/ヒートシールニス/紙310g
積層体(内面):PE30μm/ヒートシールニス(着肉30%)/紙310g
接着強度a、b、c:5、2、3(N/15mm)
(Example 7)
Cover material: PET 12 μm / EP sealant A 30 μm
Laminated body (flange): PE 30 μm / heat seal varnish / paper 310 g
Laminated body (inner surface): PE 30 μm / heat seal varnish (thickness 30%) / paper 310 g
Adhesive strength a, b, c: 5, 2, 3 (N / 15 mm)

(実施例8)
蓋材:PET12μm/EPシーラントA30μm
積層体(フランジ):PE30μm/粘着剤/紙350.1g
積層体(内面):PE30μm/粘着剤(着肉40%)/紙350.1g
接着強度a、b、c:9、6、7(N/15mm)
(Example 8)
Cover material: PET 12 μm / EP sealant A 30 μm
Laminated body (flange): PE 30 μm / adhesive / paper 350.1 g
Laminated body (inner surface): PE 30 μm / adhesive (filling 40%) / paper 350.1 g
Adhesive strength a, b, c: 9, 6, 7 (N / 15 mm)

(実施例9)
蓋材:PET12μm/EPシーラントA30μm
積層体(フランジ):PE30μm/粘着剤/紙260g
積層体(内面):PE30μm/粘着剤(着肉30%)/紙260g
接着強度a、b、c:10、4、7(N/15mm)
(Example 9)
Cover material: PET 12 μm / EP sealant A 30 μm
Laminated body (flange): PE 30 μm / adhesive / paper 260 g
Laminated body (inner surface): PE 30 μm / adhesive (filling 30%) / paper 260 g
Adhesive strength a, b, c: 10, 4, 7 (N / 15 mm)

(実施例10)
蓋材:透明蒸着PET12μm/EPシーラントA30μm
積層体(フランジ):PE系バリア多層50μm/sPE18μm/紙40g
積層体(内面):PE系バリア多層50μm/sPE18μm/剥離ニス/紙40g
接着強度a、b、c:5、2、1(N/15mm)
(Example 10)
Closure: Transparent-film PET 12 μm / EP sealant A 30 μm
Laminated body (flange): PE-based barrier multilayer 50 μm / sPE 18 μm / paper 40 g
Laminated body (inner surface): PE-based barrier multilayer 50 μm / sPE 18 μm / peeling varnish / paper 40 g
Adhesive strength a, b, c: 5, 2, 1 (N / 15 mm)

(実施例11)
蓋材:透明蒸着PET12μm/EPシーラントA30μm
積層体(フランジ):PE系バリア多層50μm/sPE18μm/紙400g
積層体(内面):PE系バリア多層50μm/sPE18μm/剥離ニス/紙400g
接着強度a、b、c:5、2、1(N/15mm)
(Example 11)
Closure: Transparent-film PET 12 μm / EP sealant A 30 μm
Laminated body (flange): PE-based barrier multilayer 50 μm / sPE 18 μm / paper 400 g
Laminated body (inner surface): PE-based barrier multilayer 50 μm / sPE 18 μm / peeling varnish / paper 400 g
Adhesive strength a, b, c: 5, 2, 1 (N / 15 mm)

(実施例12)
蓋材:PET12μm/EPシーラントA30μm
積層体(フランジ):PE30μm/sPE15μm/紙310g
積層体(内面):PE30μm/sPE15μm/紙310g
接着強度a、b、c:7、7、3(N/15mm)
(Example 12)
Cover material: PET 12 μm / EP sealant A 30 μm
Laminated body (flange): PE 30 μm / sPE 15 μm / paper 310 g
Laminated body (inner surface): PE 30 μm / sPE 15 μm / paper 310 g
Adhesive strength a, b, c: 7, 7, 3 (N / 15 mm)

(実施例13)
蓋材:透明蒸着PET12μm/PE30μm
積層体(フランジ):PE系バリア多層50μm/sPE18μm/紙310g
積層体(内面):PE系バリア多層50μm/sPE18μm/紙310g
接着強度a、b、c:5、5、15(N/15mm)
(Example 13)
Cover material: Transparent-film PET 12 μm / PE 30 μm
Laminated body (flange): PE-based barrier multilayer 50 μm / sPE 18 μm / paper 310 g
Laminated body (inner surface): PE-based barrier multilayer 50 μm / sPE 18 μm / paper 310 g
Adhesive strength a, b, c: 5, 5, 15 (N / 15 mm)

(実施例14)
蓋材:透明蒸着PET12μm/EPシーラントA30μm
積層体(フランジ):PE系バリア多層50μm/sPE18μm/紙310g
積層体(内面):PE系バリア多層50μm/sPE18μm/剥離ニス/紙310g
接着強度a、b、c:0.9、0.5、0.6(N/15mm)
(Example 14)
Closure: Transparent-film PET 12 μm / EP sealant A 30 μm
Laminated body (flange): PE-based barrier multilayer 50 μm / sPE 18 μm / paper 310 g
Laminated body (inner surface): PE-based barrier multilayer 50 μm / sPE 18 μm / peeling varnish / paper 310 g
Adhesive strength a, b, c: 0.9, 0.5, 0.6 (N / 15mm)

(実施例15)
蓋材:透明蒸着PET12μm/EPシーラントA30μm
積層体(フランジ):PE系バリア多層50μm/sPE18μm/紙310g
積層体(内面):PE系バリア多層50μm/sPE18μm/剥離ニス/紙310g
接着強度a、b、c:11、5、8(N/15mm)
(Example 15)
Closure: Transparent-film PET 12 μm / EP sealant A 30 μm
Laminated body (flange): PE-based barrier multilayer 50 μm / sPE 18 μm / paper 310 g
Laminated body (inner surface): PE-based barrier multilayer 50 μm / sPE 18 μm / peeling varnish / paper 310 g
Adhesive strength a, b, c: 11, 5, 8 (N / 15 mm)

以上の実施例において、シーラントAは、ポリエチレンと接着可能なシーラントとして、東レ製7601Aを用いた。シーラントBは、ポリプロピレンと接着可能なシーラントとして、東レフィルム加工製9601Aを用いた。シーラントCは、ポリエチレンテレフタレートと接着可能なシーラントとして東セロ製ABF64Cを用いた。 In the above examples, as the sealant A, 7601A manufactured by Toray Industries, Inc. was used as a sealant that can be adhered to polyethylene. As the sealant B, 9601A manufactured by Toray Film Processing Co., Ltd. was used as a sealant that can be adhered to polypropylene. As the sealant C, ABF64C manufactured by Tohcello was used as a sealant that can be adhered to polyethylene terephthalate.

また、PE系バリア多層フィルムは、三菱ケミカル製のPE20μm/ad(接着剤)/EVOH(エチレン−ビニルアルコール共重合体)10μm/ad/PE20μmの層構成のフィルムである。PP系バリア多層フィルムは、三菱ケミカル製のCPP20μm/ad/EVOH10μm/ad/CPP20μmの層構成のフィルムである。 The PE-based barrier multilayer film is a film having a layer structure of PE 20 μm / ad (adhesive) / EVOH (ethylene-vinyl alcohol copolymer) 10 μm / ad / PE 20 μm manufactured by Mitsubishi Chemical Corporation. The PP-based barrier multilayer film is a film having a layer structure of CPP 20 μm / ad / EVOH 10 μm / ad / CPP 20 μm manufactured by Mitsubishi Chemical Corporation.

(比較例1〜15)
上述の実施例1〜15のそれぞれにおいて、紙層にフランジ11を幅方向に切断する切り込みを設け、フランジ11の連続性を損なったものを比較例1〜15とした。
(Comparative Examples 1 to 15)
In each of the above-mentioned Examples 1 to 15, the paper layer is provided with a notch for cutting the flange 11 in the width direction, and the one in which the continuity of the flange 11 is impaired is referred to as Comparative Examples 1 to 15.

(評価1:液漏れ)
実施例1〜15、比較例1〜15に係る包装容器に浸透液を入れて40℃、75%RHで1か月保存し、液漏れ有無を評価した。実施例1〜15は、いずれも、浸透液の漏れがなかった。比較例1〜15はいずれも、フランジ11が切り込み部分において変形して段差が発生し、段差から浸透液の漏れが発生した。
(Evaluation 1: Leakage)
The penetrant was placed in the packaging container according to Examples 1 to 15 and Comparative Examples 1 to 15 and stored at 40 ° C. and 75% RH for 1 month, and the presence or absence of liquid leakage was evaluated. In Examples 1 to 15, there was no leakage of the penetrant. In Comparative Examples 1 to 15, the flange 11 was deformed at the cut portion to generate a step, and the permeate leaked from the step.

(評価2:衝撃)
実施例1〜15、比較例1〜15に係る包装容器に、200gの内容物を入れて、JIS Z0200に準拠して、落下、振動に対する耐性を評価した。実施例1〜15は、いずれも、フィルムや蓋材の剥離がなかった。比較例1〜15はいずれも、フランジ11が切り込み部分において変形して段差が発生し、フィルムおよび蓋材の一方または両方に剥離が発生した。
(Evaluation 2: Impact)
200 g of the contents were placed in the packaging containers according to Examples 1 to 15 and Comparative Examples 1 to 15, and the resistance to dropping and vibration was evaluated according to JIS Z0200. In Examples 1 to 15, there was no peeling of the film or the lid material. In Comparative Examples 1 to 15, the flange 11 was deformed at the cut portion to generate a step, and peeling occurred on one or both of the film and the lid material.

(評価3:開封性)
実施例1〜15に係る包装容器について、人手によって蓋材をフランジ上のフィルムから剥離して開封する作業のしやすさを評価した。いずれも好適に開封することが可能であった。そのうち、接着強度a>cである実施例1〜12、14、15は、フィルムが蓋材に随伴してフランジから剥離することが全くなく、とくに好適に開封することが可能であった。
(Evaluation 3: Openability)
Regarding the packaging containers according to Examples 1 to 15, the ease of opening the packaging by manually peeling the lid material from the film on the flange was evaluated. Both were able to be opened suitably. Among them, in Examples 1 to 12, 14, and 15 in which the adhesive strength a> c, the film did not peel off from the flange accompanying the lid material, and the film could be opened particularly preferably.

(評価4:分別性)
実施例1〜15に係る包装容器について、人手によってフランジおよび容器本体内面を被覆するフィルムを剥離する作業のしやすさを評価した。いずれも好適に剥離することが可能であった。そのうち、接着強度a>bである実施例1〜11、14、15は、容器本体内面部分の剥離に要する力がフランジ部分の剥離に要する力より小さくてすみ、剥離がとくにしやすかった。また、接着強度aが10N/15mm以下、とくに7N/15mm以下、あるいは、接着強度bが6N/15mm以下、とくに5N/15mmであると、剥離に要する力が小さくてすみ、とくに好適に剥離を行うことができた。
(Evaluation 4: Discrimination)
Regarding the packaging containers according to Examples 1 to 15, the ease of work of manually peeling off the flange and the film covering the inner surface of the container body was evaluated. Both were able to be suitably peeled off. Among them, in Examples 1 to 11, 14, and 15 in which the adhesive strength a> b, the force required for peeling the inner surface portion of the container body was smaller than the force required for peeling the flange portion, and the peeling was particularly easy. Further, when the adhesive strength a is 10 N / 15 mm or less, particularly 7 N / 15 mm or less, or the adhesive strength b is 6 N / 15 mm or less, particularly 5 N / 15 mm, the force required for peeling is small, and peeling is particularly preferable. I was able to do it.

以上のように、本発明に係る、シート材を折り曲げて形成される包装容器は、フランジの全周にわたってシート材が連続しているので、包装容器の強度が高く、包装容器の形状を維持しやすい。 As described above, in the packaging container formed by bending the sheet material according to the present invention, since the sheet material is continuous over the entire circumference of the flange, the strength of the packaging container is high and the shape of the packaging container is maintained. Cheap.

本発明は、シート材を折り曲げて構成された包装容器に有用である。 The present invention is useful for a packaging container configured by bending a sheet material.

10 シート材
11 フランジ
11’ 接着代
12 第2側面
13 第1側面
14、15 底面
16、19 切り込み
17、18 ツメ
20 シート材
30 容器本体
40 フィルム
50 蓋材
10 Sheet material 11 Flange 11'Adhesion allowance 12 Second side surface 13 First side surface 14, 15 Bottom surface 16, 19 Notches 17, 18 Claws 20 Sheet material 30 Container body 40 Film 50 Closure material

Claims (5)

シート材で形成された容器本体を含む包装容器であって、
前記シート材が全周において連続する枠形状のフランジを備え、
前記シート材の前記フランジの内縁から延伸する部分と、外縁から延伸する部分とによって、前記容器本体の側面および底面が構成される、包装容器。
A packaging container including a container body made of a sheet material.
The sheet material has a frame-shaped flange that is continuous all around.
A packaging container in which the side surfaces and the bottom surface of the container body are formed by a portion of the sheet material extending from the inner edge of the flange and a portion extending from the outer edge.
前記フランジは矩形状であり、
前記側面は、前記シート材の前記フランジの対向する2辺の内縁からそれぞれ延伸する部分によって構成される2つの第1側面と、前記シート材の前記フランジの対向する他の2辺の外縁からそれぞれ延伸する部分によって構成される2つの第2側面とを含み、
前記底面は、前記シート材の各前記第1側面からそれぞれ延伸する部分と各前記第2側面からそれぞれ延伸する部分との4つの部分によって構成される、請求項1に記載の包装容器。
The flange is rectangular and has a rectangular shape.
The side surfaces are two first side surfaces formed by portions extending from the inner edges of the two opposing sides of the flange of the sheet material, and the outer edges of the other two opposite sides of the flange of the sheet material, respectively. Includes two second sides composed of stretched portions
The packaging container according to claim 1, wherein the bottom surface is composed of four parts, a portion extending from each of the first side surfaces of the sheet material and a portion extending from each of the second side surfaces.
前記容器本体の内面の少なくとも一部および前記フランジにはフィルムが積層され、前記フランジに積層された前記フィルムとシールされ、前記容器本体を封止する蓋材をさらに備える、請求項1または2に記載の包装容器。 Claim 1 or 2, wherein a film is laminated on at least a part of the inner surface of the container body and the flange is sealed with the film laminated on the flange, and further includes a lid material for sealing the container body. The described packaging container. 前記フランジと前記フランジに積層された前記フィルムとの接着強度は、前記フランジに積層された前記フィルムと前記蓋材との接着強度より高い、請求項3に記載の包装容器。 The packaging container according to claim 3, wherein the adhesive strength between the flange and the film laminated on the flange is higher than the adhesive strength between the film laminated on the flange and the lid material. 前記容器本体の内面と前記内面に積層された前記フィルムとの接着強度は、前記フランジと前記フランジに積層された前記フィルムとの接着強度より低い、請求項3または4に記載の包装容器。 The packaging container according to claim 3 or 4, wherein the adhesive strength between the inner surface of the container body and the film laminated on the inner surface is lower than the adhesive strength between the flange and the film laminated on the flange.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023177647A1 (en) * 2022-03-15 2023-09-21 Graphic Packaging International, Llc Trays for food products and related systems and methods
WO2023212265A1 (en) * 2022-04-29 2023-11-02 Graphic Packaging International, Llc Container with liner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023177647A1 (en) * 2022-03-15 2023-09-21 Graphic Packaging International, Llc Trays for food products and related systems and methods
WO2023212265A1 (en) * 2022-04-29 2023-11-02 Graphic Packaging International, Llc Container with liner

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