JP2007168833A - Paper container and paper material for container - Google Patents

Paper container and paper material for container Download PDF

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JP2007168833A
JP2007168833A JP2005367642A JP2005367642A JP2007168833A JP 2007168833 A JP2007168833 A JP 2007168833A JP 2005367642 A JP2005367642 A JP 2005367642A JP 2005367642 A JP2005367642 A JP 2005367642A JP 2007168833 A JP2007168833 A JP 2007168833A
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container
paper
line
paper material
ruled line
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Tatsuya Mochida
達也 持田
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Daishowa Paper Products Co Ltd
MA Aluminum Corp
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Mitsubishi Aluminum Co Ltd
Daishowa Paper Products Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bottomed cylindrical container integrally formed from a paper material, the container being designed such that processability is improved to allow the integral formation of the container from a paper material of low strength, wherein a water port and an air vent are made without degrading formability and strength, and fracturing and breaking are easy. <P>SOLUTION: Pleats 6 are formed in a circumferential side wall 2 along part of its circumference or the entire circumference such that an outward fold 4 and an inward fold 5 alternate in the direction of the circumference. A crease 7 formed in the paper material in advance is located along part of each fold or the entire fold. Thus, an easy-to-tear line 8 is formed along part of each crease 7 or the entire crease 7. In manufacturing such a paper container, creases are formed along the folds in the positions where the folds are to be formed, and the easy-to-tear process line is formed along part of each crease or the entire crease. Thus, such a paper material is used. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、食品類の収容や植物栽培用ポット等の広い分野で用いられている紙製容器およびその容器用紙材に関するものである。   The present invention relates to a paper container and its container paper material used in a wide range of fields such as food storage and plant cultivation pots.

従来、ケーキカップやパンカップなどの食品類の収容や植物栽培の育苗ポットに用いられる容器は、当初から使用の最後において破棄されることが前提とされており、廃棄等が容易という理由で有底筒状の紙製容器が広く利用されている。この紙製容器は、例えば側周壁面となる扇状の紙材と、底部となる円形の紙材を個々に成型し、該底部と該側周壁面との接触部を接着剤を用いて貼り合わせることにより製造されている。しかし、この製造方法では、前記貼り合わせ作業による製造工程が負担になり、また、貼り合わせ部に不良が生じる場合があるという問題がある。さらに食品関係や環境を考慮すべき使用用途では上記接着剤などの化学物質の使用をできるだけ避けたいという要望がある。   Conventionally, containers used for the storage of foods such as cake cups and bread cups and seedling pots for plant cultivation are assumed to be discarded at the end of use from the beginning, and this is because it is easy to dispose of them. Bottom cylindrical paper containers are widely used. In this paper container, for example, a fan-shaped paper material serving as a side wall surface and a circular paper material serving as a bottom portion are individually molded, and a contact portion between the bottom portion and the side wall surface is bonded using an adhesive. It is manufactured by. However, this manufacturing method has a problem that the manufacturing process by the bonding operation becomes a burden, and a defect may occur in the bonding portion. Furthermore, there is a demand for avoiding the use of chemical substances such as adhesives as much as possible in applications where food relations and the environment should be considered.

そこで、紙材を一体形成することによって上記容器を製造する方法が提案されている(例えば特許文献1参照)。この製造方法によれば、有害な成分の化学物質を含む接着剤を使用することなく、貼り合わせ工程を省略して低コストで紙製容器を得ることができる。
一方、一体形成の紙製容器は絞り加工により製造されるため、該加工に耐え得る紙材強度が必要であり、紙材として坪量で120g/m程度以上が必要とされたり、これよりも薄い紙材ではOPP(二軸延伸ポリプロピレン)やPET(ポリエチレンテレフタレート)フィルム等を紙材に貼り合わせて補強することが必要とされている。しかし、上記紙製容器は、破棄を前提としており、また大量消費されるものであることから、原材料コストおよび環境面から薄い(坪量の小さい)ものほど望ましく、また上記フィルムによる補強が不要なものが望ましいといえる。ところで、上記紙製容器を絞り加工によって一体成形により製造する場合、容器の側周壁面に外折り内折りの折り目が繰り返し形成されて筒部が形成される。この筒部の形成において紙材に部分的に大きな応力が加わるため紙材としての強度が要求されることになる。これに対し、予め折り目の予定位置に罫線を設けておくことで絞り加工に際し容易に折り目が形成され、紙材に加わる応力が軽減されることが予測され、より薄い紙材を用いた紙製容器の製造が可能になることが期待される。
特開平3−111246号公報
Therefore, a method for manufacturing the container by integrally forming paper materials has been proposed (see, for example, Patent Document 1). According to this manufacturing method, a paper container can be obtained at low cost by omitting the bonding step without using an adhesive containing a chemical substance that is a harmful component.
On the other hand, since the integrally formed paper container is manufactured by drawing, the paper material strength that can withstand the processing is necessary, and the paper material requires a basis weight of about 120 g / m 2 or more. However, for thin paper materials, it is necessary to reinforce by sticking OPP (biaxially oriented polypropylene) or PET (polyethylene terephthalate) film to the paper material. However, since the paper container is premised on disposal and is consumed in large quantities, it is desirable that the material is thin (low basis weight) from the viewpoint of raw material costs and the environment, and reinforcement with the film is unnecessary. Things are desirable. By the way, when manufacturing the said paper container by integral forming by drawing, the outer fold inner fold is repeatedly formed in the side wall surface of a container, and a cylinder part is formed. In forming the tube portion, a large stress is partially applied to the paper material, so that the strength as the paper material is required. On the other hand, it is predicted that a crease will be easily formed at the time of drawing by providing a ruled line at the planned position of the fold in advance, and the stress applied to the paper material is expected to be reduced. It is expected that the manufacture of the container will be possible.
JP-A-3-111246

ところで、上記紙製容器をパンやケーキの容器として使用する場合、該容器では、調理中に余分な水分や空気を容器外に排出できるように通水孔や通気孔を設けることが要望されている。また、育苗ポットとして使用される際には、窒素欠乏症を防ぐために外部との通気を確保できる通気孔を有していることが要望される。さらに、パンやケーキの材料を紙製容器に収容して調理する最中に、パンやケーキが膨張して容器自体が自然に破断することや、調理後に容器のみを破いて廃棄しやすいことが求められ、育苗ポットにおいても、苗を容器に入れたまま土に植えた場合に苗の根が張る障害にならないように容器が破れ易いことが求められている。   By the way, when the paper container is used as a bread or cake container, the container is required to be provided with a water passage hole or a vent hole so that excess moisture and air can be discharged outside the container during cooking. Yes. Moreover, when using as a seedling pot, in order to prevent nitrogen deficiency, it is requested | required to have a vent hole which can ensure ventilation | gas_flowing with the exterior. In addition, while the bread or cake material is housed in a paper container and cooked, the bread or cake may expand and the container itself may break naturally, or it may be easy to tear only the container after cooking and discard it. In the seedling pot, there is a demand for the container to be easily broken so as not to obstruct the seedling roots when the seedling is planted in the soil while being placed in the container.

上記要望に対しては、紙製容器を形成した後、側周壁に断続したスリットを加工することで対処する方法が考えられる。しかし、上記スリットの形成を容器形成後に行うのは、手間がかかり、製造コストを上昇させる要因になる。これに対し、容器形成前に予め紙材にスリットを形成しておくことも考えられるが、上記した絞り加工に際しては、該スリットによって紙材が破断したり、形成後の形が崩れてしまうなどの問題があり、実用的ではない。また、容器形成後にスリットを形成した場合でも、上記のように薄い紙材を用いた場合には、容器としての強度がスリットによって低下し、強度不足により十分な保型性が得られず、内容物の収容に支障が生じるという問題がある。   A method for dealing with the above-mentioned demand is considered by processing an intermittent slit in the side peripheral wall after forming a paper container. However, the formation of the slits after the formation of the container is time consuming and causes an increase in manufacturing cost. On the other hand, it is conceivable to form a slit in the paper material in advance before forming the container. However, in the above drawing process, the paper material is broken by the slit, or the shape after the formation is broken. Is not practical. In addition, even when slits are formed after the container is formed, when a thin paper material is used as described above, the strength as a container is reduced by the slits, and sufficient shape retention cannot be obtained due to insufficient strength. There is a problem in that the housing of objects is hindered.

本発明は、上記事情を背景としてなされたものであり、一体形成される容器用の材料として強度の低い紙材の使用を可能とし、また、成形性や保型性を損なうことなく、また形成後の加工を要することなく通水孔や通気孔を得ることができる紙製容器および容器用紙材を提供することを目的とする。   The present invention has been made against the background of the above circumstances, and allows the use of a low-strength paper material as a material for an integrally formed container, and can be formed without impairing moldability and shape retention. It is an object of the present invention to provide a paper container and a container paper material capable of obtaining a water passage hole and a vent hole without requiring subsequent processing.

すなわち本発明の紙製容器のうち請求項1記載の発明は、紙材から一体形成された有底筒状の容器であって、側周壁の一部または全周に渡り、外折りおよび内折りの折り目を周方向に繰り返し有するひだ部が形成されており、前記折り目の一部または全部には予め紙材に設けられた罫線が前記折り目に沿って位置し、該罫線の一部または全部に、該罫線に沿った易切裂き加工線が設けられていることを特徴とする。   That is, the invention according to claim 1 of the paper containers of the present invention is a bottomed cylindrical container integrally formed from paper material, and is folded outward and inward over a part or the entire circumference of the side peripheral wall. A crease portion that repeatedly has a fold in the circumferential direction is formed, and a ruled line previously provided on the paper material is located along the fold in a part or all of the fold, and a part or all of the ruled line Further, an easy tear line along the ruled line is provided.

請求項2記載の紙製容器の発明は、請求項1記載の発明において、前記易切裂き加工線は貫通孔または付加罫線からなることを特徴とする。   A paper container according to a second aspect of the present invention is characterized in that, in the first aspect of the invention, the easy-cleavage line comprises a through hole or an additional ruled line.

請求項3記載の紙製容器の発明は、請求項1か2に記載の発明において、前記易切裂き加工線は不連続の貫通孔または付加罫線からなることを特徴とする。   The invention of the paper container according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the easy-to-cut line is composed of discontinuous through holes or additional ruled lines.

請求項4記載の紙製容器の発明は、請求項3に記載の発明において、前記易切裂き加工線は波線状または点線状の貫通孔または付加罫線からなることを特徴とする。   According to a fourth aspect of the present invention, there is provided the paper container according to the third aspect, wherein the easy-cleavage line comprises a wavy line or a dotted line-shaped through hole or an additional ruled line.

請求項5記載の紙製容器の発明は、請求項1〜4のいずれかに記載の発明において、前記罫線以外の側周壁面に易切裂き加工線が設けられていることを特徴とする。   The invention of the paper container according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, an easy-cleavage processing line is provided on a side wall surface other than the ruled line.

請求項6記載の紙製容器の発明は、請求項1〜5のいずれかに記載の発明において、該罫線が、少なくとも外折りの折り目に沿って位置していることを特徴とする。   The invention of a paper container according to a sixth aspect is characterized in that, in the invention according to any one of the first to fifth aspects, the ruled line is located along at least an outer fold.

請求項7記載の紙製容器の発明は、請求項1〜6のいずれかに記載の発明において、前記紙材の坪量が、30〜100g/mであることを特徴とする。 A paper container according to a seventh aspect is characterized in that, in the invention according to any one of the first to sixth aspects, a basis weight of the paper material is 30 to 100 g / m 2 .

請求項8記載の紙製容器の発明は、請求項1〜7のいずれかに記載の発明において、前記紙材の片面または両面に、被覆層が形成されていることを特徴とする。   An invention of a paper container according to an eighth aspect is characterized in that, in the invention according to any one of the first to seventh aspects, a coating layer is formed on one side or both sides of the paper material.

請求項9記載の容器用紙材の発明は、外折りおよび内折りの折り目を周方向に繰り返し有するひだ部が形成された有底筒状の容器を一体形成により製造するための容器用紙材であって、前記折り目の予定位置の一部または全部に該折り目に沿った罫線が設けられており、該罫線の一部または全部に、該罫線に沿った易切裂き加工線が設けられていることを特徴とする。   The invention of the container paper material according to claim 9 is a container paper material for manufacturing a bottomed cylindrical container formed integrally by forming a pleated portion having repeated outer and inner folds in the circumferential direction. In addition, a ruled line along the crease is provided at a part or all of the planned position of the fold, and an easy-cleavage line along the ruled line is provided at a part or all of the ruled line. It is characterized by.

すなわち本発明の紙製容器によれば、罫線が位置する折り目では、罫線に従って正確な位置に折り目が形成されており、したがって該罫線に設けられた易切裂き加工線が折り目に正確に位置している。折り目を有するひだは紙材が重なり合っており、折り目に位置する易切裂き加工線による強度低下は僅かなものとなる。したがって、該紙製容器は、容器としての強度を十分に有し、保型性にも優れており、内容物を収容する際にも内容物の保持を安定して確実に行うことができる。そして、上記易切裂き加工線は、紙材を貫通するものでは、通気孔や通水孔として作用する。また、パンやケーキの容器、育苗ポットのように、当初は内容物の保持を確実に行い、使用の経過に伴って破断を必要とする場合にも内容物の経時的な形状変化などによって易切裂き加工線に基づいて容易に破断をすることができる。また、破棄に際しても易切裂き加工線によって容易に破断等を行うことができる。   That is, according to the paper container of the present invention, the crease where the ruled line is located, the crease is formed at an accurate position according to the ruled line, and therefore the easy tear line provided on the ruled line is accurately located on the crease. ing. The folds having the folds are overlapped with the paper material, and the strength reduction due to the easy tearing line located at the folds is slight. Therefore, the paper container has sufficient strength as a container, is excellent in shape retention, and can stably hold the contents stably when the contents are stored. And the said easy tearing process line | wire acts as a vent hole or a water flow hole in what penetrates paper material. In addition, when the contents are securely held at the beginning, such as a bread or cake container or a seedling pot, and the breakage is required as the use progresses, the contents change easily over time. It can be easily broken based on the cut line. Moreover, even when discarded, it can be easily broken by an easy tear line.

また、本発明の容器用紙材によれば、ひだの折り目が形成されるように、前記折り目の予定位置の一部または全部に罫線が設けられており、紙製容器として一体形成する際に、該罫線に従って折り目が容易に形成され、紙材に加わる応力を分散させて紙材の破損や形崩れを防止することができる。また、紙材の壁面に易切裂き加工線を設けておくと、比較的薄い紙材では、前述したように一体形成の際に紙材が破れる製造不良が起こる可能性があるが、易切裂き加工線を折り目の予定位置に設けておけば、形成時の応力が易切裂き加工線に大きく加わることがなく、形成を良好に行うことができる。一体形成前に折り目の位置を想定して紙材に易切裂き加工線を正確に形成することは事実上困難であるが、本願発明では、易切裂き加工線が罫線に設けられているため、一体形成に際し、易切裂き加工線が速やかに折り目に位置することになり、良好に形成を行うことができる。したがって、強度の低い紙材、例えば坪量が30〜100g/mの紙材を用いても絞り加工による一体形成が可能となる。すなわち、厚手の紙や、フィルムなどの貼合紙材でなくても、薄い紙の単体や、コート剤や押出樹脂を塗布した基材でも形成が可能(容易)になる。また、紙材に罫線を入れておくことで成形性が向上し、同じ強度の素材であればより深いカップの形成が可能になる。なお、本発明としては、上記のように坪量が30〜100g/mの薄い紙材を用いる場合により顕著な効果が得られるが、それよりも厚い紙材を用いても本発明の効果が得られることは当然である。 Further, according to the container paper material of the present invention, a ruled line is provided in part or all of the planned position of the fold so that a fold of the fold is formed, and when integrally forming as a paper container, A crease is easily formed according to the ruled lines, and the stress applied to the paper material can be dispersed to prevent the paper material from being damaged or deformed. In addition, if an easy tear line is provided on the wall surface of the paper material, a relatively thin paper material may cause a manufacturing failure that breaks the paper material when integrally formed as described above. If the tearing process line is provided at the planned position of the fold, the stress at the time of formation is not greatly applied to the easy tearing process line, and the formation can be performed satisfactorily. Although it is practically difficult to accurately form an easy tear line on the paper material assuming the position of the crease before the integral formation, in the present invention, the easy tear line is provided on the ruled line. In the case of the integral formation, the easy tear line is quickly located at the crease, and the formation can be performed satisfactorily. Therefore, even when a paper material having low strength, for example, a paper material having a basis weight of 30 to 100 g / m 2 , can be integrally formed by drawing. That is, even if it is not a thick paper or a bonding paper material such as a film, it can be formed (easy) even with a thin paper alone or a base material coated with a coating agent or an extruded resin. Further, by forming ruled lines in the paper material, the moldability is improved, and a deeper cup can be formed if the material has the same strength. In the present invention, a remarkable effect can be obtained when a thin paper material having a basis weight of 30 to 100 g / m 2 is used as described above, but the effect of the present invention can be obtained even when a thicker paper material is used. It is natural that is obtained.

なお、前記罫線は深くなるほど一体形成をし易くなるものの、過度に深く形成すると罫線の形成時に紙材自体が強く圧縮されて紙材にゆがみが発生しやすくなる。ゆがみが生じた紙材を形成時のプレス用金型に設置しようとすると、適正な位置に設置することが難しく製造不良を引き起こすことがある。また、前記ひずみにより一体形成時に紙材がランダムに破断することもある。逆に前記罫線が浅いと、紙材のスプリングバックが大きくなり、罫線を設けない場合よりも一体形成が難しくなる。これに対し、罫線に沿って易切裂き加工線を施すことで、比較的浅い罫線であってもスプリングバックを回避することができ、必要以上に罫線を深くしなくても一体形成を容易に行うことが可能になる。
上記紙材を用いて製造された紙製容器は、容器としての強度を十分に有し、保型性にも優れている。そして罫線に設けられた易切裂き加工線は、ひだ部の折り目に正確に位置して、通気性や通水性の機能をもたらし、また、容器を容易に破断することを可能にする。
In addition, although the ruled line becomes easier to be integrally formed as it becomes deeper, if it is formed too deep, the paper material itself is strongly compressed when the ruled line is formed, and the paper material is likely to be distorted. If an attempt is made to install a distorted paper material in a press mold at the time of formation, it may be difficult to install the paper material at an appropriate position, which may cause a manufacturing defect. Further, the paper material may be randomly broken during the integral formation due to the strain. On the contrary, if the ruled line is shallow, the spring back of the paper material becomes large, and it is difficult to integrally form it compared to the case where no ruled line is provided. On the other hand, by applying an easy tearing line along the ruled line, springback can be avoided even with a relatively shallow ruled line, and it is easy to form a single piece without making the ruled line deeper than necessary. It becomes possible to do.
A paper container manufactured using the paper material has sufficient strength as a container and is excellent in shape retention. And the easy tearing process line provided in the ruled line is accurately positioned at the fold of the fold portion, provides air permeability and water permeability, and allows the container to be easily broken.

なお、本発明による紙製容器の底面は多角形としてもよいし、底面を円形状にしてもよい。要は、有底の筒形状を有するものであればよい。また、外折りおよび内折りの折り目を周方向に繰り返し有するひだ部は、側周壁面の一部に有するものでもよく、また全周に亘って有するものであってもよい。   The bottom surface of the paper container according to the present invention may be polygonal, or the bottom surface may be circular. In short, it may be anything having a bottomed cylindrical shape. Further, the fold portion having the outer fold and the inner fold repeatedly in the circumferential direction may be provided on a part of the side wall surface or may be provided over the entire circumference.

前記罫線は、外折り、内折りの折り目のどちらを対象に設けられているものでもよいが、一体形成に際し優先的に折り目を形成する外折りの折り目予定部分に設けるのが望ましい。対象となる外折りまたは内折りの折り目予定部の一部に設けるものであってもよく、また、外折り、内折りの折り目予定部の両方に設けるものであってもよい。
また、易切裂き加工線は、罫線に重ね合わせた位置で形成されており、罫線の全長に亘る他、罫線の長さ方向の一部に設けられるものであってもよい。
The ruled line may be provided for either the outer fold or the inner fold, but it is desirable to provide the ruled line in a portion of the outer fold that preferentially forms the fold when integrally forming. It may be provided in a part of the planned outer fold or inner fold fold, or may be provided in both the outer fold and the inner fold planned fold.
Moreover, the easy tearing process line is formed at a position superimposed on the ruled line, and may be provided on a part of the length of the ruled line in addition to the entire length of the ruled line.

前記易切裂き加工線は、連続または不連続のものであり、不連続のものでは、通常は、点線または破線状の貫通孔または付加罫線として罫線に沿って形成される。前記罫線や易切裂き加工線の形成方法は、本発明としては特に限定されるものではなく、常法を採用することができる。また、点線、破線状の易切裂き加工線を形成する場合、そのピッチ等も切裂きの容易性や強度に与える影響などを勘案して適宜定めることができる。また、前記易切裂き加工線は、紙材または容器としての強度に問題がなければ、罫線上に加えて、他の部位に設けることも可能である。   The easy-cleavage processing line is continuous or discontinuous, and the discontinuous line is usually formed along the ruled line as a dotted or broken through hole or additional ruled line. The formation method of the ruled line or the easy tearing process line is not particularly limited as the present invention, and a conventional method can be adopted. Further, when forming an easily tearing line in the form of a dotted line or a broken line, the pitch or the like can be determined as appropriate in consideration of the effect on the ease of tearing and the strength. In addition to the ruled line, the easy tear line can be provided in other parts as long as there is no problem in strength as a paper material or a container.

前記易切裂き加工線が貫通孔の場合において、貫通孔の大きさおよび形状は、強度の低下がなく、さらにパンやケーキの生地等の充填物がこぼれることなく余分な水または必要な空気を通すものとして、丸孔よりも細く短い切り込みが望ましい。ただし、本発明としては、貫通孔の大きさや形状が特定のものに限定されるものではない。   In the case where the easy tear line is a through-hole, the size and shape of the through-hole are not reduced in strength, and extra water or necessary air is passed without spilling filling such as bread or cake dough. It is desirable that the cut is narrower and shorter than the round hole. However, as for this invention, the magnitude | size and shape of a through-hole are not limited to a specific thing.

なお、本発明の紙製容器では、紙製容器開口部縁に巻回部を設けることにより、より側周壁面のひだ部の収容状態が安定する。前記ひだ部が膨張する際にも、上記巻回部によって開口部での安定した収容状態を維持することができる。なお、本発明の紙製容器は、巻回部の有無や巻回部を有する場合の巻き回数が限定されるものではない。   In addition, in the paper container of this invention, the accommodation state of the pleat part of a side peripheral wall surface is stabilized more by providing a winding part in the paper container opening edge. Even when the pleat portion expands, a stable housing state at the opening can be maintained by the winding portion. In addition, the paper container of this invention does not limit the presence or absence of a winding part, and the frequency | count of winding in the case of having a winding part.

以上説明したように、本発明の有底筒状の紙製容器によれば、紙材から一体形成された有底筒状の容器であって、側周壁面の一部または全周に渡り、外折りおよび内折りの折り目を周方向に繰り返し有するひだ部が形成されており、前記折り目の一部または全部には予め紙材に設けられた罫線が前記折り目に沿って位置し、該罫線の一部または全部に、該罫線に沿った易切裂き加工線が施されているので、易切裂き加工線を有する容器であっても容器としての強度を十分に有し、保型性に優れており、内容物の収容において内容物の保持を安定して確実に行うことができる。そして、上記易切裂き加工線は、紙材を貫通するものでは、通気孔や通水孔として作用し、また、パンやケーキの容器、育苗ポットのように当初は内容物の保持を確実に行い、使用の経過に伴って破断を必要とする場合には内容物の経時的な形状変化や使用者による取り扱いによって易切裂き加工線に基づいて容易に破断させることができる。   As described above, according to the bottomed cylindrical paper container of the present invention, it is a bottomed cylindrical container integrally formed from paper material, over a part or the entire circumference of the side peripheral wall surface, A pleat portion having repeated outer folds and inner folds in the circumferential direction is formed, and a ruled line previously provided on the paper material is located along the fold in part or all of the fold, Since some or all of them are provided with an easy tear line along the ruled line, even a container having an easy tear line has sufficient strength as a container and has excellent shape retention. Therefore, it is possible to stably and reliably hold the contents when the contents are accommodated. The above easy-to-break line acts as a ventilation hole or a water passage hole when penetrating the paper material, and ensures the initial holding of the contents like a bread or cake container or a seedling pot. If it is necessary to break with the progress of use, it can be easily broken based on the easy tear line by changing the shape of the contents over time or handling by the user.

また、本発明の容器用紙材によれば、外折りおよび内折りの折り目を周方向に繰り返し有するひだ部が形成された有底筒状の容器を一体形成により製造するための容器用紙材であって、前記折り目の予定位置の一部または全部に該折り目に沿った罫線が設けられており、該罫線の一部または全部に、該罫線に沿った易切裂き加工線が施されているので、紙製容器として一体形成する際に、前記罫線に従って折り目が容易に形成される。また、形成時の応力が易切裂き加工線に大きく加わることがなく、速やかに折り目に位置することになり、良好に形成を行うことができる。   Further, the container paper material of the present invention is a container paper material for manufacturing a bottomed cylindrical container formed integrally with a pleated portion having repeated outer and inner folds in the circumferential direction. In addition, a ruled line along the crease is provided at a part or all of the planned position of the fold, and an easy tearing line along the ruled line is applied to a part or all of the ruled line. When the paper container is integrally formed, the crease is easily formed according to the ruled line. In addition, the stress at the time of formation is not greatly applied to the easy-to-break line, and it is positioned quickly at the crease, so that the formation can be performed satisfactorily.

以下に、本発明の一実施形態の紙製容器を図1〜図3に基づいて説明する。
紙製容器10は、図1に示すように底部2の周縁からは筒状の側周壁3が立ち上がった有底筒状形状を有しており、30〜100g/mの坪量からなる1枚の紙材によって一体に形成されている。前記側周壁3は、上方に向かうに従って径が大きくなるテーパ形状を有し、上端部は開口して外側に巻き回した巻回部9が形成されている。また該側周壁3には、図1、2に示すように縦方向に沿った外折りの折り目4と内折りの折り目5とを周方向に繰り返し有するひだ部6が形成されている。
Below, the paper container of one Embodiment of this invention is demonstrated based on FIGS. 1-3.
As shown in FIG. 1, the paper container 10 has a bottomed cylindrical shape in which a cylindrical side peripheral wall 3 rises from the periphery of the bottom portion 2, and has a basis weight of 30 to 100 g / m 2. It is integrally formed of a sheet of paper material. The side peripheral wall 3 has a tapered shape whose diameter increases toward the upper side, and an upper end portion is opened and a winding portion 9 wound outward is formed. Further, as shown in FIGS. 1 and 2, the side peripheral wall 3 is formed with a fold portion 6 that repeatedly has an outer fold crease 4 and an inner fold crease 5 along the longitudinal direction in the circumferential direction.

さらに前記外折りの折り目4には、図3の展開状態図に示すように、各折り目4に沿って罫線7が位置している。該罫線7は、予め紙材に形成されているものであり、紙製容器の形成に際し、該罫線7に沿って外折りの折り目4が形成される。したがって、該罫線7は、外折りの折り目が形成されやすいように、紙材への形成面の選択や罫線深さ、罫線太さを適宜定める。また、該罫線7には、易切裂き加工線として罫線7に沿った破線状の貫通孔8が形成されている。この紙製容器10では、罫線7に従って正確な位置に折り目4が形成されており、破線状の貫通孔8が折り目4に正確に位置している。
なお、該貫通孔8が罫線7に沿って形成されていることにより、上記罫線7の深さは、罫線7のみを形成する場合に比べて相対的に浅くすることができる。
なお、この実施形態では罫線7…7の全てに対し破線状の貫通孔8が形成されているが、罫線7…7のうち、一部の罫線7に破線状の貫通孔8が形成されているものでもよい。
また、紙製容器10の片面または両面には、必要に応じて押出樹脂ラミネートやコート材の塗布、フィルムの貼合などによって被覆層を形成してもよい。この実施形態では、紙製容器10の内面に、撥水作用のある被覆層が形成されている。よって食品類の充填や、育苗ポット等として利用可能となる。
Further, as shown in the development state diagram of FIG. 3, ruled lines 7 are positioned along the fold lines 4 in the outward fold lines 4. The ruled line 7 is formed in advance on a paper material, and an outer fold line 4 is formed along the ruled line 7 when the paper container is formed. Therefore, for the ruled line 7, selection of the formation surface on the paper material, ruled line depth, and ruled line thickness are appropriately determined so that an outward fold is easily formed. The ruled line 7 is formed with a broken through-hole 8 along the ruled line 7 as an easy tear line. In the paper container 10, the crease 4 is formed at an accurate position according to the ruled line 7, and the broken through-hole 8 is accurately positioned at the crease 4.
Since the through holes 8 are formed along the ruled lines 7, the depth of the ruled lines 7 can be made relatively shallow compared to the case where only the ruled lines 7 are formed.
In this embodiment, the broken-line through holes 8 are formed for all of the ruled lines 7... 7, but the broken line-shaped through holes 8 are formed in some of the ruled lines 7. It may be what you have.
Moreover, you may form a coating layer in the single side | surface or both surfaces of the paper container 10 by extrusion resin lamination, application | coating of a coating material, bonding of a film, etc. as needed. In this embodiment, a water-repellent coating layer is formed on the inner surface of the paper container 10. Therefore, it can be used for filling foods, raising seedling pots, and the like.

上記紙製容器10では、巻回部9で囲まれた開口部を通してパンやケーキの材料や苗を植えた土壌などが内容物として収容される。紙製容器10では、上記したように破線状の貫通孔8が折り目4に位置し、壁面には位置していないので、貫通孔8によって容器としての強度が損なわれることは殆どなく、十分な保型性が得られる。したがって、内容物を確実かつ安定して収容することがことができる。上記紙製容器10に内容物を収容した後、上記破線状の貫通孔8は、通気孔や通水孔として機能し、紙製容器10内部の水の排出や外部との通気性能を得ることができる。また、パンやケーキの調理によって内容物が膨張する際には、所望によって破線状の貫通孔8を介して紙製容器10が破断され、内容物からの分離や容器自身の破棄を容易にする。また、育苗ポットとして使用する際には、水の排出や外部との通気が可能になり、また、そのまま地中に埋設するような場合には、窒素を移動を可能にして育苗を良好にする。さらに、苗の生長に伴って根が伸長する際には、破線状の貫通孔8を通して外部への根の伸長を容易にする。   In the paper container 10, bread and cake materials, soil planted with seedlings, and the like are accommodated as contents through an opening surrounded by the winding part 9. In the paper container 10, since the broken through-hole 8 is located at the crease 4 and not on the wall surface as described above, the strength as a container is hardly impaired by the through-hole 8, which is sufficient. Shape retention is obtained. Therefore, the contents can be reliably and stably accommodated. After the contents are stored in the paper container 10, the broken through-hole 8 functions as a ventilation hole or a water passage hole to obtain the water discharge inside the paper container 10 and the ventilation performance to the outside. Can do. In addition, when the contents are expanded by cooking bread or cake, the paper container 10 is broken through the broken through-holes 8 as desired to facilitate separation from the contents and disposal of the containers themselves. . In addition, when used as a seedling pot, water can be discharged and externally vented, and when it is buried in the ground as it is, nitrogen can be moved to improve the seedling. . Further, when the roots extend with the growth of the seedlings, the roots are easily extended to the outside through the broken through-holes 8.

以下に本実施形態における前記紙製容器の製造方法を説明する。
図4(a)に示すように円形ブランクの容器用紙材1を用意し、該容器用紙材1の中央部円形状の底部予定部2aを除いた側周壁予定部3aに、前記底部予定部2aの周縁から紙材外周縁へ放射状に向けて所定の角度間隔で罫線7…7を形成する。罫線7の形成は、凹凸状に罫線の筋の入った金型を用いた常法により行うことができる。該罫線7が形成された位置は、紙製容器を一体形成する際に、ひだ部の外折りの折り目が形成される予定位置となる。
該罫線7は深い加工を施すと紙材のゆがみ等の損傷を与えることがあるので、浅い加工とする。すなわち、以降の工程で罫線7に形成する破線状の貫通孔8との組み合わせにより、折り目の形成が容易となるので、損傷を与えるほどに罫線を深く施す必要がなくなる。
A method for manufacturing the paper container in the present embodiment will be described below.
As shown in FIG. 4 (a), a container paper material 1 of a circular blank is prepared, and the bottom planned portion 2a is formed on the side peripheral wall planned portion 3a excluding the central bottom circular planned portion 2a of the container paper material 1. The ruled lines 7... 7 are formed at predetermined angular intervals radially from the periphery of the paper toward the outer periphery of the paper material. The ruled line 7 can be formed by a conventional method using a mold having a ruled line in an uneven shape. The position where the ruled line 7 is formed is a planned position where a fold of the outer fold of the fold portion is formed when the paper container is integrally formed.
If the ruled line 7 is deeply processed, it may cause damage such as distortion of the paper material. That is, the combination with the broken through-holes 8 formed on the ruled line 7 in the subsequent process facilitates the formation of the crease, so that it is not necessary to apply the ruled line deep enough to cause damage.

次に、図4(b)に示すように罫線7に、該罫線にそって破線状の貫通孔8を易切裂き加工線として形成する。該貫通孔8は、図5に示すようにごく細く短い多数の切れ目を所定の間隔で罫線7に沿って重なり合うようにして加工したものである。貫通孔8は、水程度の粘性の液体が充填されても余計な圧力が掛からない限り漏れがない程度に細く、さらに液体が充填されてない場合は空気を取り入れられる程度の太さとして施すことが望ましい。前記貫通孔8により、折り目での折り曲げが速やかになされ、絞り加工がさらに容易になり、30〜100g/m程度の強度の低い紙材でも良好な一体形成が可能になる。また、同程度の強度の紙材であれば従来より深い容器の絞り加工が可能である。図4(b)に示される容器用紙材1は、本発明の紙材の一実施形態を示すものである。ただし、本発明の容器用紙材の製造方法は、上記工程などの特定のものに限定されるものではなく、罫線の形成、易切裂き加工線の形成も特定の方法に限定されない。 Next, as shown in FIG. 4B, a broken through hole 8 is formed on the ruled line 7 along the ruled line as an easy-cleavage line. As shown in FIG. 5, the through-holes 8 are processed so as to overlap a number of very thin and short cuts along the ruled lines 7 at a predetermined interval. The through-hole 8 should be thin enough to prevent leakage even if it is filled with a viscous liquid such as water so long as no excess pressure is applied. Is desirable. The through-holes 8 can be quickly folded at the creases, making drawing easier, and even a paper material having a low strength of about 30 to 100 g / m 2 can be integrally formed. Further, if the paper material has the same level of strength, the container can be drawn deeper than before. The container paper material 1 shown in FIG. 4B shows an embodiment of the paper material of the present invention. However, the manufacturing method of the container paper material of the present invention is not limited to a specific method such as the above-described process, and the formation of ruled lines and the easy-to-break processing line are not limited to a specific method.

次に、上記容器用紙材1aを用いた紙製容器の一体形成の手順を図6に基づいて説明する。
図6(a)は、底部予定部2aを底にして、側周壁予定部3aを立ち上げる加工工程を示している。具体的には、筒状の型孔内に収まるように側周壁予定部3aの内側からポンチ(図示しない)を底部予定部2a側に押し込む。すると、側周壁予定部3aの端部側(開口部)を収束させながら罫線7に従って外折りの折り目4が形成されるように側周壁予定部3aが折り曲がっていく。隣接する罫線7の全てを同時に外折り4の折り目として加工すると、底部2と側周壁3とが形成される(図6(b))。その際に、開口部が収束することで外折りの折り目4、4の間に次第にたるみが出現し、さらに収束が進行することで折り目4、4の間に内向きの折り目5が形成される。この際に、側周壁3に回転力を加えると、内折りの形成が円滑になされる。
Next, a procedure for integrally forming a paper container using the container paper material 1a will be described with reference to FIG.
FIG. 6A shows a processing step of raising the side peripheral wall planned portion 3a with the bottom planned portion 2a as the bottom. Specifically, a punch (not shown) is pushed into the side of the planned bottom portion 2a from the inside of the side peripheral wall planned portion 3a so as to fit within the cylindrical mold cavity. Then, the side peripheral wall planned portion 3a is bent so that the outer fold line 4 is formed according to the ruled line 7 while converging the end side (opening) of the side peripheral wall planned portion 3a. When all of the adjacent ruled lines 7 are simultaneously processed as the folds of the outer fold 4, the bottom portion 2 and the side peripheral wall 3 are formed (FIG. 6B). At this time, as the opening converges, a sag gradually appears between the outer folds 4 and 4, and further convergence progresses to form an inward fold 5 between the folds 4 and 4. . At this time, if a rotational force is applied to the side peripheral wall 3, the inner fold is smoothly formed.

図6(c)が示すように絞り加工を完了することで、外折りの折り目4と内折りの折り目5とが周方向に繰り返し形成されて側周壁3にひだ部6が設けられる。
さらに、側周壁3の端部は、外側に巻き回して巻回部9を形成する(図6(d))。前記ひだ部6は、互いに非接着状態であり、容器の膨張が容易であるが、巻回部9を設けることにより、ひだ部6の形態が安定し、容器の保型性が一層向上する。
上記により得られる紙製容器は、上記したように保型性に優れ、また、破線状の貫通孔8によって通気性、通水性が得られ、また、必要に応じて容易に破断させることができる。
上記実施形態において、本発明の容器用紙材を用いれば、加工性が向上し、強度の低い紙材でも容器の一体形成ができ、また、底の深い容器の一体形成も容易となる。さらに、また、容器の強度を維持したままでままで通水孔や通気孔を設けることが可能となり、さらに破断が容易な容器が得られる。
By completing the drawing as shown in FIG. 6C, the outer fold crease 4 and the inner fold crease 5 are repeatedly formed in the circumferential direction, and the fold portion 6 is provided on the side peripheral wall 3.
Further, the end portion of the side peripheral wall 3 is wound outward to form a wound portion 9 (FIG. 6D). The pleat portions 6 are not adhered to each other and the container can be easily expanded. However, by providing the winding portion 9, the form of the pleat portion 6 is stabilized and the shape retention of the container is further improved.
The paper container obtained as described above is excellent in shape retention as described above, and has air permeability and water permeability through the broken through-holes 8 and can be easily broken as required. .
In the above embodiment, when the container paper material of the present invention is used, the processability is improved, the container can be integrally formed even with a low-strength paper material, and the container with a deep bottom is easily formed. Furthermore, it is possible to provide a water passage hole or a vent hole while maintaining the strength of the container, and a container that can be easily broken can be obtained.

なお、上記実施形態では、易切裂き加工線としては破線状の貫通孔について説明したが、点線状に配置するものであってもよく、その長さや間隔は適宜定めることができる。また、易切裂き加工線として紙材を貫通していないものであってよく、例えば図7に示すように、罫線7にさらに付加される破線状の付加罫線8aによって形成することもできる。
さらに、図8(a)のように易切裂き加工線として、連続した直線状の付加罫線8bを罫線に沿って形成することもできる。その他に易切裂き加工線として、罫線上に付加される連続した直線状の貫通孔を形成してもよい。該構成によっても破断が容易な紙製容器が得られる。
また、図8(b)のように罫線以外の側周壁面に他の易切裂き加工線として直線状の貫通孔8cを形成することもできる。前記のように罫線以外の側周壁面に設けられた易切裂き加工線も波線状または点線状の貫通孔または付加罫線であってもよい。その長さや間隔は適宜定めることができ、該構成によっても、容器の強度を確保した上で、破断が容易で通水孔や通気孔としての効果のより向上した紙製容器が得られる。
また、上記実施形態では、外折りの折り目位置に罫線が設けられているものについて説明したが、本発明としては内折りの折り目に罫線を有するものであってもよく、また外折り、内折りの両方の折り目に罫線を有するものであっても良い。また、罫線以外に所望により通気孔や通気孔を付加することも可能であるが、容器の強度や成形性を考慮して形成するのが望ましい。
In the above-described embodiment, the broken through holes have been described as the easy tear lines, but they may be arranged in dotted lines, and the lengths and intervals can be determined as appropriate. Moreover, the paper material may not be penetrated as the easy tearing process line, and for example, as shown in FIG. 7, it can also be formed by a broken additional ruled line 8 a added to the ruled line 7.
Furthermore, as shown in FIG. 8A, continuous straight additional ruled lines 8b can be formed along the ruled lines as easy-to-cut lines. In addition, a continuous linear through-hole added on the ruled line may be formed as the easy tearing process line. Even with this configuration, a paper container that can be easily broken can be obtained.
Further, as shown in FIG. 8B, a straight through-hole 8c can be formed on the side wall surface other than the ruled line as another easy tear line. As described above, the easy tear line provided on the side wall surface other than the ruled line may also be a wavy or dotted through hole or an additional ruled line. The length and interval can be determined as appropriate, and with this configuration, it is possible to obtain a paper container that is easy to break and more effective as a water hole or a vent hole while ensuring the strength of the container.
Further, in the above embodiment, the description has been given of the case in which the ruled line is provided at the position of the outer fold. However, the present invention may have a ruled line in the inner fold, and the outer fold and the inner fold may be provided. Both of the folds may have ruled lines. In addition to the ruled lines, it is possible to add a ventilation hole or a ventilation hole as desired, but it is desirable to form in consideration of the strength and formability of the container.

なお、上記実施形態に基づいて本発明の説明を行ったが、本発明は上記実施形態の説明に限定されるものではなく、本発明の範囲を逸脱しない範囲において変更が可能である。   Although the present invention has been described based on the above embodiment, the present invention is not limited to the description of the above embodiment, and can be modified without departing from the scope of the present invention.

本発明の一実施形態の紙製容器を示す正面図である。It is a front view which shows the paper container of one Embodiment of this invention. 図1のII−II線断面図である。It is the II-II sectional view taken on the line of FIG. 図1のIII−III線断面における展開状態を示す部分拡大図である。It is the elements on larger scale which show the expansion | deployment state in the III-III line cross section of FIG. 本発明の一実施形態の容器用紙材およびその形成手順を示す説明図である。It is explanatory drawing which shows the container paper material of one Embodiment of this invention, and its formation procedure. 同じく容器用紙材の一部拡大図である。It is a partially enlarged view of container paper material. 同じく容器用紙材を用いた紙製容器の一体形成の工程を示す図である。It is a figure which similarly shows the process of the integral formation of the paper containers using a container paper material. 本発明の他の実施形態における易切裂き加工線を示す拡大図である。It is an enlarged view which shows the easy tear line in other embodiment of this invention. 本発明の一実施形態の容器用紙材を示す説明図である。It is explanatory drawing which shows the container paper material of one Embodiment of this invention.

符号の説明Explanation of symbols

1 容器用紙材
2 底部
3 側周壁
4 外折りの折り目
5 内折りの折り目
6 ひだ部
7 罫線
8 破線状の貫通孔
8a 破線状の付加罫線
8b 直線状の付加罫線
8c 直線状の貫通孔
9 巻回部
10 紙製容器
DESCRIPTION OF SYMBOLS 1 Container paper material 2 Bottom part 3 Side peripheral wall 4 Folding fold 5 Inner fold fold 6 Folding part 7 Ruled line 8 Broken-line-like through-hole 8a Broken-line-like additional ruled line 8b Straight-lined additional ruled line 8c Linear-shaped through-hole Turning part 10 Paper container

Claims (9)

紙材から一体形成された有底筒状の容器であって、側周壁の一部または全周に渡り、外折りおよび内折りの折り目を周方向に繰り返し有するひだ部が形成されており、前記折り目の一部または全部には予め紙材に設けられた罫線が前記折り目に沿って位置し、該罫線の一部または全部に、該罫線に沿った易切裂き加工線が設けられていることを特徴とする紙製容器。   A bottomed cylindrical container integrally formed from a paper material, over a part or the entire circumference of the side peripheral wall, formed with a pleated portion having repeated outer and inner folds in the circumferential direction, A ruled line provided in advance on the paper material is positioned along the fold in part or all of the crease, and an easy tear processing line along the ruled line is provided in part or all of the crease. Paper container characterized by. 前記易切裂き加工線は貫通孔または付加罫線からなることを特徴とする請求項1に記載の紙製容器。   The paper container according to claim 1, wherein the easy-cleavage processing line includes a through hole or an additional ruled line. 前記易切裂き加工線は不連続の貫通孔または付加罫線からなることを特徴とする請求項1または2に記載の紙製容器。   The paper-made container according to claim 1 or 2, wherein the easy-cleavage processing line comprises discontinuous through holes or additional ruled lines. 前記易切裂き加工線は波線状または点線状の貫通孔または付加罫線からなることを特徴とする請求項3に記載の紙製容器。   The paper container according to claim 3, wherein the easy-cleavage processing line comprises a wavy or dotted through hole or an additional ruled line. 前記罫線以外の側周壁面に易切裂き加工線が設けられていることを特徴とする請求項1〜4のいずれかに記載の紙製容器。   The paper container according to any one of claims 1 to 4, wherein an easy tear line is provided on a side wall surface other than the ruled line. 前記罫線は、少なくとも外折りの折り目に沿って位置していることを特徴とする請求項1〜5のいずれかに記載の紙製容器。   The paper container according to any one of claims 1 to 5, wherein the ruled line is positioned along at least a fold of outward folding. 前記紙材の坪量が、30〜100g/mであることを特徴とする請求項1〜6のいずれかに記載の紙製容器。 Paper container according to claim 1, the basis weight of the paper material, characterized in that it is a 30 to 100 g / m 2. 前記紙材の片面または両面に、被覆層が形成されていることを特徴とする請求項1〜7のいずれかに記載の紙製容器。   The paper container according to any one of claims 1 to 7, wherein a covering layer is formed on one side or both sides of the paper material. 外折りおよび内折りの折り目を周方向に繰り返し有するひだ部が形成された有底筒状の容器を一体形成により製造するための容器用紙材であって、前記折り目の予定位置の一部または全部に該折り目に沿った罫線が設けられており、該罫線の一部または全部に、該罫線に沿った易切裂き加工線が設けられていることを特徴とする容器用紙材。   A container paper material for integrally manufacturing a bottomed cylindrical container in which a fold portion having repeated outer and inner folds in the circumferential direction is formed, and part or all of the planned positions of the folds The container paper material is characterized in that a ruled line is provided along the crease, and an easy tear line along the ruled line is provided on a part or all of the ruled line.
JP2005367642A 2005-12-21 2005-12-21 Paper container and paper material for container Pending JP2007168833A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5251841A (en) * 1975-10-23 1977-04-26 Hughes Aircraft Co Piiloop phase bit device
JPS59172585A (en) * 1983-03-19 1984-09-29 Sumikin Coke Co Ltd Preparation of blast furnace coke
JPH0350316U (en) * 1989-09-22 1991-05-16
JPH03106171U (en) * 1990-02-20 1991-11-01
JPH0853122A (en) * 1994-08-09 1996-02-27 Dainippon Printing Co Ltd Paper container

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5251841A (en) * 1975-10-23 1977-04-26 Hughes Aircraft Co Piiloop phase bit device
JPS59172585A (en) * 1983-03-19 1984-09-29 Sumikin Coke Co Ltd Preparation of blast furnace coke
JPH0350316U (en) * 1989-09-22 1991-05-16
JPH03106171U (en) * 1990-02-20 1991-11-01
JPH0853122A (en) * 1994-08-09 1996-02-27 Dainippon Printing Co Ltd Paper container

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