JPWO2019044279A1 - Paper container - Google Patents
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- JPWO2019044279A1 JPWO2019044279A1 JP2019539072A JP2019539072A JPWO2019044279A1 JP WO2019044279 A1 JPWO2019044279 A1 JP WO2019044279A1 JP 2019539072 A JP2019539072 A JP 2019539072A JP 2019539072 A JP2019539072 A JP 2019539072A JP WO2019044279 A1 JPWO2019044279 A1 JP WO2019044279A1
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- paper container
- wall surface
- closing portion
- paper
- top closure
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
- B65D3/02—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by shape
- B65D3/08—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by shape having a cross-section of varying shape, e.g. circular merging into square or rectangular
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
- B65D3/10—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by form of integral or permanently secured end closure
- B65D3/20—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by form of integral or permanently secured end closure with end portion of body adapted to be closed, by flattening or folding operations, e.g. formed with crease lines or flaps
Abstract
簡単な構成で、底面側を下にして立てて置いた際も安定するとともに、特殊な製造設備を必要としない紙容器を提供すること。底面の周縁部に密着した筒状の壁面を有し、壁面の頂部には、内面同士を直線状に貼り合わせた頂部閉鎖部を有し、底面は、頂部閉鎖部の伸びる方向の差し渡しが、頂部閉鎖部と直交する方向の差し渡しより長いこと。To provide a paper container that has a simple configuration, is stable even when placed upright with its bottom side down, and does not require special manufacturing equipment. It has a cylindrical wall surface in close contact with the peripheral edge of the bottom surface, and has a top closure portion in which the inner surfaces are linearly bonded to each other at the top of the wall surface, and the bottom surface extends in the direction in which the top closure portion extends, Must be longer than the crossing in the direction perpendicular to the top closure.
Description
本発明は、底面と、底面の周縁部に密着した筒状の壁面とを有し、壁面の頂部に内面同士を直線状に貼り合わせた頂部閉鎖部を有する紙容器に関する。 The present invention relates to a paper container having a bottom surface, a cylindrical wall surface in close contact with a peripheral portion of the bottom surface, and a top closed portion in which the inner surfaces are linearly bonded to each other at the top of the wall surface.
従来より、紙容器は、包装容器の分野で汎用され、底面と、底面の周縁部に密着した筒状の壁面とを有した紙容器が公知である。
例えば、特許文献１には、紙層を主体とした包装材からなる扇形状のブランク板を巻回して該ブランク板の両側端を貼合することにより上広がりの壁面（胴壁）を構成し、該壁面（胴壁）の下部には円形状の底面（底板４）の周縁部に密着して底部閉鎖部を形成すると共に、該壁面（胴壁）の頂部（上部）には開口端部の内面同士を直線状に貼り合わせて頂部閉鎖部を形成した紙容器が開示されている。BACKGROUND ART Conventionally, paper containers are widely used in the field of packaging containers, and a paper container having a bottom surface and a cylindrical wall surface closely attached to a peripheral portion of the bottom surface is known.
For example, in Patent Literature 1, a fan-shaped blank plate made of a wrapping material mainly composed of a paper layer is wound, and both side edges of the blank plate are bonded to form an upper-spread wall surface (body wall). At the lower portion of the wall surface (body wall), a bottom closed portion is formed in close contact with the peripheral edge of the circular bottom surface (bottom plate 4), and at the top (upper portion) of the wall surface (body wall), an open end portion is provided. There is disclosed a paper container in which the inner surfaces of the paper containers are linearly adhered to each other to form a closed top portion.
底面と、底面の周縁部に密着した筒状の壁面とを有した紙容器は、壁面の頂部を直線状に貼り合わせて頂部閉鎖部を形成する際に、直線状の頂部閉鎖部と直交する方向の底面の側方が直線状の頂部閉鎖部に向かって上方に引っ張られて変形する。
特許文献１の公知の技術では、底面（底板４）が円形状であることから、頂部を閉鎖する際に引っ張られることよって、図６に示すように、紙容器５００の壁面５２０（胴壁）の下端縁５２２（いわゆる「糸底」）が、直線状の頂部閉鎖部５２１が伸びる方向を最下端としたアーチ状となり、底面５１０側を下にして立てて置いた際に不安定となり、場合によっては転倒してしまう虞があった。
また、このような変形を見越して、壁面５２０の下端縁５２２を設計することも考えられるが、逆に、頂部閉鎖部５２１を閉塞する前の壁面５２０の下端縁５２２がアーチ状になった状態で、底面５１０の周縁部に筒状に密着させる必要があり、従来の製造設備では対応が困難であるという問題があった。A paper container having a bottom surface and a cylindrical wall surface closely attached to the peripheral edge of the bottom surface is orthogonal to the linear top closure portion when the top portions of the wall surfaces are linearly bonded to form a top closure portion. The side of the bottom in the direction is deformed by being pulled upward toward the linear top closure.
In the known technique of Patent Literature 1, since the bottom surface (bottom plate 4) is circular, it is pulled when closing the top, so that the wall surface 520 (body wall) of the paper container 500 as shown in FIG. Has a lower end edge 522 (so-called “thread bottom”) having an arch shape with the direction in which the linear top closing portion 521 extends as the lowermost end, and becomes unstable when placed upright with the bottom surface 510 side down, and in some cases, May fall down.
In addition, it is conceivable to design the lower edge 522 of the wall surface 520 in anticipation of such a deformation. On the contrary, a state in which the lower edge 522 of the wall surface 520 is in an arch shape before closing the top closing portion 521 is considered. Therefore, it is necessary to closely contact the periphery of the bottom surface 510 in a cylindrical shape, and there is a problem that it is difficult to cope with the conventional manufacturing equipment.
本発明は、これらの問題点を解決するものであり、簡単な構成で、底面側を下にして立てて置いた際も安定するとともに、特殊な製造設備を必要としない紙容器を提供することを目的とするものである。 The present invention is to solve these problems, and to provide a paper container that has a simple configuration, is stable even when placed upright with the bottom side down, and does not require special manufacturing equipment. It is intended for.
本発明の紙容器は、底面と、前記底面の周縁部に密着した筒状の壁面とを有した紙容器であって、前記壁面の頂部には、内面同士を直線状に貼り合わせた頂部閉鎖部を有し、前記底面は、前記頂部閉鎖部の伸びる方向の差し渡しが、前記頂部閉鎖部と直交する方向の差し渡しより長いことにより、前記課題を解決するものである。 The paper container of the present invention is a paper container having a bottom surface and a cylindrical wall surface closely attached to a peripheral portion of the bottom surface, and a top closure in which inner surfaces are linearly bonded to each other at the top of the wall surface. The above-mentioned problem is solved in that the bottom surface has a portion extending in a direction in which the top closing portion extends in a direction extending in a direction perpendicular to the top closing portion.
請求項１に係る紙容器によれば、底面は、頂部閉鎖部の伸びる方向の差し渡しが、頂部閉鎖部と直交する方向の差し渡しより長いことにより、頂部を閉鎖する際の壁面の下端縁の持ち上がりが小さくなり、一般的な製造工程で製造された紙容器であっても底面側を下にして立てて置いた際も安定した紙容器とすることが可能となる。
底面の頂部閉鎖部と直交する方向の差し渡しと頂部閉鎖部の伸びる方向の差し渡しの寸法比は、１：１．２〜１：２．５であることが好ましく、１：１．２〜１：１．８であれば一般的な製造工程での製造も容易であり、さらに好適である。
また、一般的な製造工程での製造をより容易とする上で、底面の頂部閉鎖部と直交する方向の差し渡しは、３０〜８０ｍｍであることが好ましく、壁面の高さは、底面の頂部閉鎖部と直交する方向の差し渡し寸法の２倍以上であることが好ましく、壁面の底面より下方に突出する寸法は、１０ｍｍ以下であることが好ましい。According to the paper container according to claim 1, the bottom surface is lifted at the lower edge of the wall surface when closing the top portion because the top closing portion extends in the extending direction in the direction perpendicular to the top closing portion. And a stable paper container can be obtained even when a paper container manufactured by a general manufacturing process is placed upright with the bottom side down.
The dimensional ratio of the width of the bottom surface in the direction perpendicular to the top closure and the width of the top closure in the direction in which the top closure extends is preferably 1: 1.2 to 1: 2.5, and 1: 1.2 to 1: 2.5. If it is 1.8, the production in a general production process is easy and more preferable.
In addition, in order to facilitate the production in a general production process, it is preferable that the width of the bottom in the direction orthogonal to the top closure is 30 to 80 mm, and the height of the wall is the top closure of the bottom. It is preferably at least twice the crossing dimension in the direction perpendicular to the part, and the dimension projecting below the bottom surface of the wall surface is preferably 10 mm or less.
請求項２に記載の構成によれば、底面の周縁部は、前記頂部閉鎖部の伸びる方向と平行な直線状の長辺部を有することにより、傾いた場合でも長辺部が直線状に接地するため、より安定した紙容器とすることが可能となる。
請求項３に記載の構成によれば、底面の周縁部は、前記頂部閉鎖部と直交する方向と平行な直線状の短辺部を有することにより、２つの短辺部が最も低い位置となって接地するため、傾斜することが防止され、さらに安定した紙容器とすることが可能となる。According to the configuration of the second aspect, the peripheral portion of the bottom surface has the long linear portion parallel to the direction in which the top closing portion extends, so that the long side portion contacts the linear shape even when inclined. Therefore, a more stable paper container can be obtained.
According to the configuration described in claim 3, the peripheral portion of the bottom surface has a linear short side parallel to the direction orthogonal to the top closing portion, so that the two short sides are at the lowest position. As a result, the paper container is prevented from tilting, and a more stable paper container can be obtained.
本発明の一実施形態に係る紙容器１００は、図１（Ａ）−（Ｃ）に示すように、底面１１０と、底面１１０の周縁部に密着した筒状の壁面１２０とを有しており、壁面１２０の頂部には、内面同士を直線状に貼り合わせた頂部閉鎖部１２１が設けられている。
底面１１０の周縁部は、図１（Ｃ）に示すように、頂部閉鎖部１２１と平行な方向の２つの長辺部１１１と、頂部閉鎖部１２１と直交する方向の２つの短辺部１１２と、２つの長辺部１１１と２つの短辺部１１２のそれぞれの端部を結ぶ４つの角曲線部１１３を有し、底面１１０は、いわゆる角丸矩形状に形成されている。As shown in FIGS. 1A to 1C, a paper container 100 according to an embodiment of the present invention has a bottom surface 110 and a cylindrical wall surface 120 that is in close contact with a peripheral portion of the bottom surface 110. The top of the wall 120 is provided with a top closing portion 121 in which the inner surfaces are linearly bonded to each other.
As shown in FIG. 1C, the peripheral edge of the bottom surface 110 includes two long sides 111 in a direction parallel to the top closure 121 and two short sides 112 in a direction perpendicular to the top closure 121. It has four corner curved portions 113 connecting respective ends of two long side portions 111 and two short side portions 112, and the bottom surface 110 is formed in a so-called rounded rectangular shape.
壁面１２０は、図２に示すような扇型の原紙を筒状とし、貼り合せ部１２３で貼り合わせることで形成される。
底面１１０は、原紙（図示せず）の周縁を下方に折り曲げ、折り曲げた箇所を筒状の壁面１２０の下端縁１２２側の内面に固着することで形成される。
これらの工程は、紙コップ等の周知の紙容器の製造工程であり、このことで、紙容器１００の底面１１０側がいわゆる糸底形状となるように形成される、
そして、収容物を投入した後に、筒状の壁面１２０の頂部の内面同士を直線状に貼り合わせ頂部閉鎖部１２１を設けることで、収容物を収容した紙容器１００が形成される。
壁面１２０及び底面１１０の原紙は、少なくとも内面側に、バリア層及び接着層とを有したコーティングが施されており、底面１１０と壁面１２０の固着、および、壁面１２０頂部の内面同士の貼り合わせは接着層の熱圧着や超音波溶着などで行われる。The wall surface 120 is formed by sticking a fan-shaped base paper as shown in FIG.
The bottom surface 110 is formed by bending the periphery of a base paper (not shown) downward and fixing the bent portion to the inner surface of the cylindrical wall surface 120 on the lower edge 122 side.
These steps are steps for manufacturing a well-known paper container such as a paper cup, whereby the bottom surface 110 side of the paper container 100 is formed so as to have a so-called thread bottom shape.
Then, after the contents are charged, the inner surfaces of the tops of the cylindrical wall surfaces 120 are linearly bonded to each other to provide the top closing portion 121, whereby the paper container 100 containing the contents is formed.
The base paper of the wall surface 120 and the bottom surface 110 is provided with a coating having a barrier layer and an adhesive layer on at least the inner surface side. This is performed by thermocompression bonding or ultrasonic welding of the adhesive layer.
紙容器１００の頂部付近には、使用者が手で切り裂いて開封するため、例えば図３（Ａ）−（Ｄ）に示すように、断続的な切込（いわゆるミシン目）によって構成された直線状のジッパー１２４が設けられている。
ジッパー１２４の位置、方向、長さ等は、収容物の取り出し態様に応じて適宜設定可能である。
図３（Ａ）の例は、頂部閉鎖部１２１の下方に水平にジッパー１２４が設けられたものであり、頂部閉鎖部１２１全体を取り去って大きく開口するのに適している。
図３（Ｂ）の例は、頂部閉鎖部１２１に切込部１２５を設けるとともに、切込部１２５から側方に向けて斜めにジッパー１２４が設けられたものであり、必要な開口面積に合わせて頂部閉鎖部１２１の一部を取り去るように構成されている。In the vicinity of the top of the paper container 100, a straight line formed by intermittent cuts (so-called perforations), for example, as shown in FIGS. A zipper 124 is provided.
The position, direction, length, and the like of the zipper 124 can be set as appropriate according to the manner in which the contents are taken out.
In the example of FIG. 3A, a zipper 124 is provided horizontally below the top closing portion 121, and is suitable for removing the entire top closing portion 121 to make a large opening.
In the example of FIG. 3 (B), a notch 125 is provided in the top closing part 121, and a zipper 124 is provided diagonally from the notch 125 to the side. It is configured to remove a part of the top closure 121.
図３（Ｃ）の例は、頂部閉鎖部１２１に切込部１２５を設けるとともに、切込部１２５から側方に向けて斜めにジッパー１２４が設けられ、さらに、そのジッパー１２４の中間部から逆の側方に向けてさらに他のジッパー１２４ｂが設けられたものであり、図３（Ｂ）の例のように、必要な開口面積に合わせて頂部閉鎖部１２１の一部を取り去るとともに、必要に応じて他のジッパー１２４ｂを切り裂くことで頂部閉鎖部１２１全体を取り去って大きく開口することも可能に構成されている。
図３（Ｄ）の例は、頂部閉鎖部１２１に切込部１２５を設けるとともに、切込部１２５から両方の側方に向けてそれぞれ斜めにジッパー１２４ｃ、１２４ｄが設けられたものであり、所望の開口面積に応じて、使用者がジッパー１２４ｃのみ、ジッパー１２４ｄのみ、あるいは両方を切り裂くことが可能に構成されている。In the example of FIG. 3C, a cut portion 125 is provided in the top closing portion 121, and a zipper 124 is provided diagonally from the cut portion 125 to the side, and further, the zipper 124 is reversed from an intermediate portion of the zipper 124. Further, another zipper 124b is provided to the side of the top portion. As shown in the example of FIG. 3B, a part of the top closing portion 121 is removed according to a necessary opening area, and In response, the other zipper 124b can be cut off to remove the entire top closure 121 and open it greatly.
In the example of FIG. 3D, notches 125 are provided in the top closing portion 121, and zippers 124 c and 124 d are provided diagonally from the notch 125 toward both sides, respectively. It is configured such that the user can cut only the zipper 124c, only the zipper 124d, or both according to the opening area of the zipper 124c.
底面１１０は、図１（Ｃ）に示すように、頂部閉鎖部１２１の伸びる方向の差し渡しＬＬが、頂部閉鎖部１２１と直交する方向の差し渡しＳＬより長くなるように構成されている。
ＬＬ＞ＳＬの関係を満たせば、底面１１０は、楕円形状、小判形状等の他の形状であってもよい。
このことで、頂部を閉鎖する際の壁面１２０の下端縁の持ち上がりが小さくなり、一般的な製造工程で製造された紙容器１００であっても底面１１０側を下にして立てて置いた際も安定した紙容器１００とすることが可能となる。As shown in FIG. 1C, the bottom surface 110 is configured such that the width LL of the top closing portion 121 in the extending direction is longer than the width SL of the direction perpendicular to the top closing portion 121.
As long as the relationship of LL> SL is satisfied, the bottom surface 110 may have another shape such as an elliptical shape or an oval shape.
As a result, the lifting of the lower edge of the wall surface 120 when the top is closed becomes small, and even when the paper container 100 is manufactured by a general manufacturing process, the paper container 100 is placed upright with the bottom surface 110 side down. A stable paper container 100 can be obtained.
本実施形態では、底面１１０は、いわゆる角丸矩形状に形成されているため、
ＬＬ＝長辺部１１１の長さ＋コーナ部半径ＣＲ×２
ＳＬ＝短辺部１１２の長さ＋コーナ部半径ＣＲ×２
となる。
直線状の長辺部１１１と短辺部１１２を有することにより、２つの短辺部１１２が最も低い位置となって直線状に接地するため、傾斜することが防止されるとともに、傾いた場合でも長辺部１１１が直線状に接地することで、安定した紙容器１００とすることが可能となる。In the present embodiment, since the bottom surface 110 is formed in a so-called rounded rectangular shape,
LL = length of long side portion 111 + radius of corner portion CR × 2
SL = length of short side 112 + radius of corner CR × 2
Becomes
By having the linear long side portion 111 and the short side portion 112, the two short side portions 112 are located at the lowest position and are grounded in a straight line. When the long side portion 111 is grounded linearly, the stable paper container 100 can be obtained.
底面１１０の頂部閉鎖部１２１と直交する方向の差し渡しＳＬと頂部閉鎖部１２１の伸びる方向の差し渡しＬＬの寸法比ＳＬ：ＬＬは、１：１．２〜１：２．５であることが好ましく、１：１．２〜１：１．８であれば一般的な製造工程での製造も容易であり、容積も確保でき、さらに好適である。
具体的な寸法として、紙コップ等の一般的な製造工程での製造をより容易とする上で、底面１１０の頂部閉鎖部１２１と直交する方向の差し渡しＳＬは、３０〜８０ｍｍであることが好ましい。
さらに、下端縁の持ち上がりを抑制しつつ、紙コップ等の一般的な製造工程での製造をより容易とする上で、壁面１２０の高さＷＨは、底面１１０の頂部閉鎖部１２１と直交する方向の差し渡し寸法ＳＬの２倍以上（ＷＨ≧ＳＬ×２）であることが好ましく、壁面１２０の底面１１０より下方に突出する寸法ＴＨは、１０ｍｍ以下であることが好ましい。The dimensional ratio SL: LL of the crossing SL in the direction orthogonal to the top closing portion 121 of the bottom surface 110 and the extending LL in the direction in which the top closing portion 121 extends is preferably 1: 1.2 to 1: 2.5, When the ratio is 1: 1.2 to 1: 1.8, the production in a general production process is easy, and the volume can be secured, which is more preferable.
As specific dimensions, in order to make the manufacture in a general manufacturing process of a paper cup or the like easier, it is preferable that the crossover SL of the bottom surface 110 in the direction orthogonal to the top closing portion 121 is 30 to 80 mm. .
Furthermore, the height WH of the wall surface 120 is set in a direction orthogonal to the top closing portion 121 of the bottom surface 110 in order to make it easier to manufacture the paper cup or the like in a general manufacturing process while suppressing the lower edge from rising. Is preferably not less than twice (WH ≧ SL × 2), and the dimension TH protruding below the bottom surface 110 of the wall surface 120 is preferably not more than 10 mm.
本発明の紙容器１００は、容器として強度と、使用者が手で切り裂いて開封する際の容易性の両立が求められることから、壁面１２０の原紙は、坪量が１５０〜３５０ｇ／ｍ２であり、抄紙時に紙が流れる方向である「縦」（ＭＤ）、縦方向に対し垂直の方向である「横」（ＣＤ）の引張強度比ＣＤ：ＭＤが、１：２．０以下のものが使用される。
また、壁面１２０の原紙の内面のバリア層は、ＰＥＴ、ＰＰまたはＨＤＰＥ一軸延伸フィルムあるいはアルミ箔で構成されている。
壁面１２０の原紙のＣＤ：ＭＤと、開封時の外観、容易性の関係の実験データを以下に示す。
下記表１に示す物性の４種類の原紙を用い、図４に示す、Ａ、Ｂの２種類のジッパー形状で開封試験を行った。
内部結合強さ：ＪＡＰＡＮ ＴＡＰＰＩ Ｎｏ．１８−２
引裂き強さ：ＪＩＳ Ｐ８１１６Since the paper container 100 of the present invention is required to have both strength as a container and easy easiness when a user tears it open by hand, the base paper of the wall surface 120 has a basis weight of 150 to 350 g / m 2 . Yes, those having a tensile strength ratio CD: MD of 1: 2.0 or less in the “longitudinal” (MD) direction in which the paper flows during papermaking and the “horizontal” (CD) direction perpendicular to the longitudinal direction. used.
The barrier layer on the inner surface of the base paper of the wall 120 is made of a PET, PP, or HDPE uniaxially stretched film or an aluminum foil.
Experimental data on the relationship between the CD: MD of the base paper on the wall surface 120 and the appearance and easiness at the time of opening is shown below.
Using four types of base paper having the physical properties shown in Table 1 below, an opening test was performed using two types of zippers A and B shown in FIG.
Internal bond strength: JAPAN TAPPI No. 18-2
Tear strength: JIS P8116
引張り試験機（ストログラフＶ−５０Ｄ；東洋精機(株)）を用い、それぞれ５個のサンプルを２００ｍｍ／ｍｉｎの速度で１８０°剥離を実施し、その結果を、
開封部に原紙残り無：○（図５参照）
開封部に原紙残り小：△
開封部に原紙残り大：×
とした。
なお、○、△は開封許容範囲（綺麗にストレスなく開封可能）と評価し、×は許容範囲外（綺麗にストレスなく開封することは困難）と評価した。
原紙Ａ：ジッパー形状Ａであれば高い確率で綺麗に開封可。しかし、形状Ｂは綺麗な開封は困難。
原紙Ｃ：ジッパー形状Ａ、Ｂとも高い確率で綺麗に開封可だが、２０％程度の割合で不可の場合もあった。
原紙Ｂ：ジッパー形状を問わず、綺麗にストレスもなく開封可能。Using a tensile tester (Strograph V-50D; Toyo Seiki Co., Ltd.), each of the five samples was subjected to 180 ° peeling at a speed of 200 mm / min.
No base paper left in the opening: ○ (See Fig. 5)
Base paper remaining small in opening section: △
Large remaining base paper in opening section: ×
And
In addition, ○ and Δ were evaluated as the allowable range of opening (can be opened cleanly without stress), and × was evaluated as out of the allowable range (it is difficult to open cleanly without stress).
Base paper A: If it is zipper shape A, it can be opened neatly with high probability. However, it is difficult to open the shape B cleanly.
Base paper C: Both zipper shapes A and B can be opened neatly with a high probability, but in some cases it was impossible at a rate of about 20%.
Base paper B: Regardless of the zipper shape, it can be opened neatly without stress.
この時のＣＤ方向の開封強度は以下のとおりである。
これらの評価結果から、ＣＤ：ＭＤの引張り強度比（原紙配向）が大きいものは適さず、ＣＤ方向の引裂き強さが低い原紙が適していることがわかる。
そこで、壁面１２０の原紙の坪量は、１５０〜３５０ｇ／ｍ２であり、壁面１２０の原紙の縦（ＭＤ）、横（ＣＤ）の引張強度比ＣＤ：ＭＤが、１：２．０以下であることにより、開封部の乱れを防止し、余計な力を必要とせず、容易に開封することができる紙容器とすることが可能となる。
また、引張強度比ＣＤ：ＭＤは、１：１．５以下であればさらに好適であり、開封の容易性を特に考慮すると、壁面１２０の原紙の横（ＣＤ）方向の引裂き強度は、１５００ｍＮ以下であることが好ましく、１４００ｍＮ以下であればさらに好適である。From these evaluation results, it can be seen that those having a large CD: MD tensile strength ratio (base paper orientation) are not suitable, and base papers having a low tear strength in the CD direction are suitable.
Therefore, the basis weight of the base paper of the wall surface 120 is 150 to 350 g / m 2 , and the longitudinal (MD) and transverse (CD) tensile strength ratio CD: MD of the base paper of the wall surface 120 is 1: 2.0 or less. With this configuration, it is possible to prevent the opening portion from being disturbed, to provide a paper container that can be easily opened without requiring an extra force.
Further, it is more preferable that the tensile strength ratio CD: MD is 1: 1.5 or less, and in consideration of ease of opening, the tear strength in the transverse (CD) direction of the base paper of the wall surface 120 is 1500 mN or less. Is more preferable if it is 1400 mN or less.
壁面１２０の原紙の内面のバリア層は、アルミ箔であればジッパー開封時に原紙と同時に容易に引き裂くことが可能である。
また、金属探知機への対応や環境配慮への観点より、汎用的なバリアフィルムであるＰＥＴフィルム等の樹脂製フィルムを使用することが考えられるが、一般的に樹脂製フィルムは引っ張りに対して容易に延びるため、ジッパー開封時に原紙が引き裂かれても樹脂製フィルムが繋がったままで、開封不良が起こる可能性がある。
そこで、ＰＥＴ、ＰＰまたはＨＤＰＥの一軸延伸フィルムを使用することで、開封部が乱れたり、余計な力を必要とすることなく、容易に開封することができる。
バリア性能と開封の容易性を考慮し、バリア層の厚さは、７〜３０μｍであることが好ましく、７〜１２μｍであればさらに好適である。If the barrier layer on the inner surface of the base paper of the wall surface 120 is an aluminum foil, it can be easily torn at the same time as the base paper when the zipper is opened.
In addition, from the viewpoint of compatibility with metal detectors and environmental considerations, it is conceivable to use a resin film such as a PET film, which is a general-purpose barrier film. Since it is easily extended, even if the base paper is torn at the time of opening the zipper, there is a possibility that the resin film remains connected and defective opening may occur.
Therefore, by using a uniaxially stretched film of PET, PP, or HDPE, the opening can be easily opened without disturbing the opening portion and requiring no extra force.
In consideration of barrier performance and ease of opening, the thickness of the barrier layer is preferably from 7 to 30 μm, and more preferably from 7 to 12 μm.
以上、本発明の実施形態を詳述したが、本発明は上記実施形態に限定されるものではなく、請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行うことが可能である。 As described above, the embodiments of the present invention have been described in detail. However, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in claims. It is.
１００、５００ ・・・ 紙容器
１１０、５１０ ・・・ 底面
１２０、５２０ ・・・ 壁面
１２１、５２１ ・・・ 頂部閉鎖部
１２２、５２２ ・・・ 下端縁（糸底）
１２３ ・・・ 貼合部
１２４ ・・・ ジッパー
１２５ ・・・ 切込部
１１１ ・・・ 長辺部
１１２ ・・・ 短辺部
１１３ ・・・ 角曲線部
ＬＬ ・・・ 頂部閉鎖部と伸びる方向の差し渡し
ＳＬ ・・・ 頂部閉鎖部の直交する方向の差し渡し
ＣＲ ・・・ コーナ部半径
ＷＨ ・・・ 壁面の高さ
ＴＨ ・・・ 壁面の底面より下方に突出する寸法100, 500 ... paper container 110, 510 ... bottom surface 120, 520 ... wall surface 121, 521 ... top closing part 122, 522 ... lower end edge (thread bottom)
123 ... bonding part 124 ... zipper 125 ... cut part 111 ... long side part 112 ... short side part 113 ... corner curve part LL ... SL ... Crossing of the top closure in the direction orthogonal to the direction CR ... Corner radius WH ... Height of the wall TH ... Dimension protruding downward from the bottom of the wall
Claims (8)
前記壁面の頂部には、内面同士を直線状に貼り合わせた頂部閉鎖部を有し、
前記底面は、前記頂部閉鎖部の伸びる方向の差し渡しが、前記頂部閉鎖部と直交する方向の差し渡しより長いことを特徴とする紙容器。A paper container having a bottom surface and a cylindrical wall surface closely attached to a peripheral portion of the bottom surface,
At the top of the wall surface, there is a top closing portion where the inner surfaces are bonded together in a straight line,
The paper container according to claim 1, wherein the bottom surface of the paper container extends in a direction in which the top closure portion extends in a direction perpendicular to the top closure portion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017163571 | 2017-08-28 | ||
| JP2017163571 | 2017-08-28 | ||
| PCT/JP2018/027641 WO2019044279A1 (en) | 2017-08-28 | 2018-07-24 | Paper container |
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| JPWO2019044279A1 true JPWO2019044279A1 (en) | 2020-01-23 |
| JP7157748B2 JP7157748B2 (en) | 2022-10-20 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3905539A (en) * | 1972-11-16 | 1975-09-16 | Morison S Cousins | Unitary container and closure with dispensing means and apparatus for storage thereof |
| JPS52113039U (en) * | 1976-02-20 | 1977-08-27 | ||
| JPH0188808U (en) * | 1987-11-30 | 1989-06-12 | ||
| JPH0188810U (en) * | 1987-11-30 | 1989-06-12 | ||
| JPH0423613U (en) * | 1990-06-18 | 1992-02-26 | ||
| US20120298663A1 (en) * | 2011-05-26 | 2012-11-29 | Printpack Illinois, Inc. | Flexible sturdy base container and method for making the same |
-
2018
- 2018-07-24 JP JP2019539072A patent/JP7157748B2/en active Active
- 2018-07-24 WO PCT/JP2018/027641 patent/WO2019044279A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3905539A (en) * | 1972-11-16 | 1975-09-16 | Morison S Cousins | Unitary container and closure with dispensing means and apparatus for storage thereof |
| JPS52113039U (en) * | 1976-02-20 | 1977-08-27 | ||
| JPH0188808U (en) * | 1987-11-30 | 1989-06-12 | ||
| JPH0188810U (en) * | 1987-11-30 | 1989-06-12 | ||
| JPH0423613U (en) * | 1990-06-18 | 1992-02-26 | ||
| US20120298663A1 (en) * | 2011-05-26 | 2012-11-29 | Printpack Illinois, Inc. | Flexible sturdy base container and method for making the same |
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| JP7157748B2 (en) | 2022-10-20 |
| WO2019044279A1 (en) | 2019-03-07 |
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