JP2023176556A - Container, and manufacturing method therefor - Google Patents
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- JP2023176556A JP2023176556A JP2022088898A JP2022088898A JP2023176556A JP 2023176556 A JP2023176556 A JP 2023176556A JP 2022088898 A JP2022088898 A JP 2022088898A JP 2022088898 A JP2022088898 A JP 2022088898A JP 2023176556 A JP2023176556 A JP 2023176556A
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- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229920000431 shape-memory polymer Polymers 0.000 claims abstract description 40
- 230000009477 glass transition Effects 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 238000005452 bending Methods 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 238000000071 blow moulding Methods 0.000 claims description 14
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 abstract 1
- 239000002243 precursor Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010101 extrusion blow moulding Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 235000002597 Solanum melongena Nutrition 0.000 description 1
- 244000061458 Solanum melongena Species 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- JFNLZVQOOSMTJK-KNVOCYPGSA-N norbornene Chemical compound C1[C@@H]2CC[C@H]1C=C2 JFNLZVQOOSMTJK-KNVOCYPGSA-N 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
本発明は容器に関する。 The present invention relates to containers.
環境への配慮等として、輸送時ＣＯ２排出減少（容器の省スペース化による輸送効率向上等）や、廃棄処分時における省スペース化が望まれている。この観点から、輸送時や保管時には減容状態（すなわち容積を減少させた状態）で、充填時、使用時などの必要な時にサイズを変化（拡大）させることができる容器にニーズがある。このために形状記憶ポリマーを使用したり、容器に折り畳みのための折り曲げ予定部を設けたりすることが提案されている（例えば特許文献１～３参照）。 In consideration of the environment, it is desired to reduce CO2 emissions during transportation (improve transportation efficiency by saving space in containers, etc.) and to save space during disposal. From this point of view, there is a need for a container that can be kept in a reduced volume state (i.e., a reduced volume state) during transportation or storage, and that can change (expand) its size when necessary, such as during filling or use. For this purpose, it has been proposed to use a shape memory polymer or to provide the container with a bending portion for folding (see, for example, Patent Documents 1 to 3).
しかし特許文献１～３に記載されるような従来の提案に従うだけでは、必要な時にサイズを大きく変化させることができる容器は得られなかった。 However, by simply following the conventional proposals such as those described in Patent Documents 1 to 3, it has not been possible to obtain a container whose size can be changed significantly when necessary.
本発明の目的は、コンパクトな減容状態を維持しつつ、必要な時に速やかにサイズを大きく変化させることができる容器を提供することにある。 An object of the present invention is to provide a container whose size can be quickly changed to a large extent when necessary while maintaining a compact and reduced volume state.
本発明の一態様は以下のとおりである。 One aspect of the present invention is as follows.
［１］
形状記憶ポリマー又は形状記憶ポリマーとそれ以外の樹脂との混合物によって形成され、
前記形状記憶ポリマーのガラス転移温度が４５～１００℃であり、
口部、肩部、胴部及び底部をこの順に有する角形ボトル状をなし、
互いに対向する２つの側壁をそれぞれ、上下方向に延びる稜線又は凹リブによって形成される折り曲げ予定部を折れ線部として内側に折り込むことにより、折り畳み可能な容器。
[1]
Formed by a shape memory polymer or a mixture of a shape memory polymer and another resin,
The shape memory polymer has a glass transition temperature of 45 to 100°C,
It is shaped like a square bottle with a mouth, a shoulder, a body and a bottom in this order,
A container that can be folded by folding two side walls facing each other inward using a bending portion formed by a ridge line or a concave rib extending in the vertical direction as a fold line portion.
［２］
前記胴部の厚さが２５０～５００μｍである、［１］に記載の容器。
[2]
The container according to [1], wherein the body has a thickness of 250 to 500 μm.
［３］
互いに対向する他の２つの側壁がそれぞれ、前記胴部の上端部と下端部のそれぞれにおいて、水平方向に延びる稜線又は凹リブによって形成される折り曲げ予定部を折れ線部として内側に折り込み可能である、［１］又は［２］に記載の容器。
[3]
The other two side walls facing each other can be folded inward at the upper end and lower end of the body using a bending portion formed by a ridge line or a concave rib extending in the horizontal direction as a fold line portion. The container according to [1] or [2].
［４］
形状記憶ポリマー又は形状記憶ポリマーとそれ以外の樹脂との混合物を、前記形状記憶ポリマーのガラス転移温度以上の内面温度に設定した成形型を用いてブロー成形することで、口部、肩部、胴部及び底部をこの順に有する容器を形成するブロー成形工程と、
前記容器を折り畳む折り畳み工程と、
折り畳み状態の前記容器を前記ガラス転移温度未満まで冷却する冷却工程と、を有する、容器の製造方法。
[4]
By blow-molding a shape memory polymer or a mixture of a shape memory polymer and other resin using a mold whose inner surface temperature is set to the glass transition temperature or higher of the shape memory polymer, the mouth, shoulders, and body can be formed. a blow molding step of forming a container having a top portion and a bottom portion in this order;
a folding step of folding the container;
A method for manufacturing a container, comprising a cooling step of cooling the container in a folded state to below the glass transition temperature.
本発明によれば、コンパクトな減容状態を維持しつつ、必要な時に速やかにサイズを大きく変化させることができる容器を提供することができる。 According to the present invention, it is possible to provide a container whose size can be quickly and significantly changed when necessary while maintaining a compact volume-reduced state.
以下、図面を参照しつつ本発明の実施形態を例示説明する。 Embodiments of the present invention will be described below by way of example with reference to the drawings.
本発明の一実施形態において、容器１は、図１～図６に実線で示される非折り畳み状態から、図４～図６に二点鎖線で示される折り畳み状態へと折り畳み可能である。非折り畳み状態の容器１は内容物（不図示）のための収容空間２を内側に形成する。内容物は特に限定されず例えば、食品、化粧品、薬品などである。 In one embodiment of the invention, the container 1 is foldable from an unfolded state shown in solid lines in FIGS. 1 to 6 to a folded state shown in dashed lines in FIGS. 4 to 6. The container 1 in the unfolded state forms an accommodation space 2 inside for the contents (not shown). The contents are not particularly limited and include, for example, foods, cosmetics, medicines, etc.
本実施形態では、折り畳み状態の容器１は、形状記憶ポリマー又は形状記憶ポリマーとそれ以外の樹脂との混合物を、形状記憶ポリマーのガラス転移温度（Ｔｇ）以上の内面温度に設定した成形型（金型）を用いてブロー成形することで、口部３、肩部４、胴部５及び底部６をこの順に有する容器１を形成するブロー成形工程と、容器１を折り畳む折り畳み工程と、折り畳み状態の容器１をガラス転移温度未満まで冷却する冷却工程と、を有する製造方法によって得られる。なお、容器１の折り畳み状態は、図４～図６に二点鎖線で示される状態から（例えば胴部５を）更に折り畳んだ状態であってもよい。例えば、折り畳み工程において、図６に二点鎖線で示される状態から更に胴部５を１回以上折り畳んで（例えば、図６の左右方向である第２水平方向の一方側から見て、第２折り曲げ予定部１０と第３折り曲げ予定部１１をそれぞれ折れ線部として谷折りするとともに胴部５の上下方向中央部を水平な折れ線部として山折りし）、上下方向にも圧縮された折り畳み状態としてもよい。折り畳み工程は、賦形された容器１がガラス転移温度未満まで冷却される前に行ってもよいし、容器１がガラス転移温度未満まで冷却された後に容器１をガラス転移温度以上に加温してから行ってもよい。なお冷却工程における冷却方法は特に限定されず、例えば急冷、徐冷、放冷等を適宜採用できる。 In the present embodiment, the folded container 1 is made of a mold (metal mold) in which a shape memory polymer or a mixture of a shape memory polymer and other resin is set at an inner surface temperature equal to or higher than the glass transition temperature (Tg) of the shape memory polymer. A blow molding process of forming a container 1 having a mouth part 3, a shoulder part 4, a body part 5 and a bottom part 6 in this order by blow molding using a mold); a folding process of folding the container 1; and a folding process of folding the container 1. It is obtained by a manufacturing method including a cooling step of cooling the container 1 to below the glass transition temperature. Note that the folded state of the container 1 may be a state in which (for example, the body portion 5) is further folded from the state shown by the two-dot chain line in FIGS. 4 to 6. For example, in the folding step, the trunk 5 is further folded one or more times from the state shown by the two-dot chain line in FIG. The folded portion 10 and the third bent portion 11 are folded into a valley as a folding line, and the central portion of the trunk 5 in the vertical direction is folded into a mountain as a horizontal folded line. good. The folding step may be performed before the shaped container 1 is cooled to below the glass transition temperature, or may be performed by heating the container 1 to above the glass transition temperature after the container 1 has been cooled to below the glass transition temperature. You can go after that. Note that the cooling method in the cooling step is not particularly limited, and for example, rapid cooling, slow cooling, standing cooling, etc. can be appropriately employed.
形状記憶ポリマーを使用すると、折り畳み状態においてもその状態を維持できる。一方、形状記憶ポリマー以外の樹脂はその弾性力により、折り畳み状態から若干復元気味の状態を維持する。つまり、形状記憶ポリマーは、折り畳み状態において形状記憶ポリマー以外の樹脂よりも小容積の減容状態を維持させることができる。また形状記憶ポリマーを使用すると、折り畳み状態（つまり減容状態）の容器１を加温により非折り畳み状態の所定の形状に拡大できる。したがって、内容物の充填前の容器１の省スペース化による輸送効率向上等により、輸送時ＣＯ２排出減少を実現できる。また廃棄処分時に加温により折り畳んだ後に冷却し、折り畳み状態を維持することで、廃棄処分時における省スペース化を実現することも可能である。 The use of shape memory polymers allows them to maintain their shape even when folded. On the other hand, resins other than shape memory polymers maintain a slightly restored state from the folded state due to their elasticity. In other words, the shape memory polymer can maintain a smaller volume state in the folded state than resins other than the shape memory polymer. Further, when a shape memory polymer is used, the container 1 in a folded state (that is, in a reduced volume state) can be expanded to a predetermined shape in an unfolded state by heating. Therefore, it is possible to reduce CO 2 emissions during transportation by improving transportation efficiency by saving space in the container 1 before filling with contents. In addition, by heating and folding the product at the time of disposal and then cooling it to maintain the folded state, it is also possible to save space at the time of disposal.
形状記憶ポリマーは特に限定されず、例えば、ポリウレタン系ポリマー、ノルボルネン系ポリマー、スチレン／ブタジエン系共重合体、トランス-イソプレン系ポリマーなど、あるいはこれらの任意の混合物である。形状記憶ポリマーとそれ以外の樹脂との混合物を使用する場合、混合物に占める形状記憶ポリマーの比率は５０重量％以上とすることが好ましい。 The shape memory polymer is not particularly limited, and may be, for example, a polyurethane polymer, a norbornene polymer, a styrene/butadiene copolymer, a trans-isoprene polymer, or any mixture thereof. When using a mixture of a shape memory polymer and another resin, the proportion of the shape memory polymer in the mixture is preferably 50% by weight or more.
形状記憶ポリマーのガラス転移温度は本実施形態では４５～１００℃であり、好ましくは４５～７０℃である。 In this embodiment, the glass transition temperature of the shape memory polymer is 45 to 100°C, preferably 45 to 70°C.
利用可能なブロー成形としては、前駆体としての有底筒状のプリフォームを成形型内で軸方向と径方向の２軸に延伸させて容器１に成形する２軸延伸ブロー成形や、前駆体としての押し出しパリソンを成形型内で径方向に延伸させて容器１に成形する押し出しブロー成形などが挙げられる。２軸延伸ブロー成形の場合、形状記憶ポリマーのガラス転移温度以上で十分に延伸できる温度（例えば射出成形後の余熱により、又は再加熱により得られる）の前駆体（プリフォーム）を用い、ガラス転移温度以上に保ったまま、容器１への賦形と折り畳み工程を行い、冷却工程でガラス転移温度未満まで冷却することが好ましい。押し出しブロー成形の場合、形状記憶ポリマーのガラス転移温度以上で十分に流動する温度の前駆体（押し出しパリソン）を用い、ガラス転移温度以上に保ったまま、容器１への賦形と折り畳み工程を行い、冷却工程でガラス転移温度未満まで冷却することが好ましい。 Available blow molding methods include biaxial stretch blow molding, in which a bottomed cylindrical preform as a precursor is stretched in two axes, axial and radial, in a mold to form the container 1; Examples include extrusion blow molding in which an extruded parison is stretched in the radial direction within a mold to form the container 1. In the case of biaxial stretch blow molding, a precursor (preform) at a temperature above the glass transition temperature of the shape memory polymer that can be stretched sufficiently (e.g., obtained by residual heat after injection molding or by reheating) is used to achieve the glass transition temperature. It is preferable to carry out the shaping and folding process into the container 1 while keeping the temperature above the temperature, and then cool the container 1 to below the glass transition temperature in the cooling process. In the case of extrusion blow molding, a precursor (extruded parison) whose temperature is sufficiently fluid at or above the glass transition temperature of the shape memory polymer is used, and the shaping and folding process into the container 1 is performed while maintaining the temperature at or above the glass transition temperature. , it is preferable to cool down to below the glass transition temperature in the cooling step.
ブロー成形工程において、前駆体は成形型の内面に接触することで冷却される。この時、容器１が形状記憶ポリマーのガラス転移温度未満とならなくとも、ブロー圧と成形型内面温度との関係で形状を記憶させることができる。したがって、成形型内面温度を、延伸開始時の前駆体の温度未満、且つ、形状記憶ポリマーのガラス転移温度以上に設定し、好ましくはガラス転移温度に５～２０℃を加えた温度に設定することができる。ここで、ガラス転移温度に５℃を加えた温度未満の温度に設定した場合、ガラス転移温度と余り変わらない温度未満なので成形品の剛性があり過ぎて容易に折り畳むことができないため、好ましくない。ガラス転移温度に２０℃を加えた温度を超える温度に設定した場合、高温による収縮が発生してしまい規定の形状より小さくなる不具合が起きてしまうこと及びガラス転移温度より高すぎる温度により成形品が柔軟になり過ぎて形状を保てず綺麗に折り畳むことが困難になるため、好ましくない。 In the blow molding process, the precursor is cooled by contacting the inner surface of the mold. At this time, even if the temperature of the container 1 is not lower than the glass transition temperature of the shape memory polymer, the shape can be memorized depending on the relationship between the blowing pressure and the inner surface temperature of the mold. Therefore, the mold inner surface temperature should be set below the temperature of the precursor at the start of stretching and above the glass transition temperature of the shape memory polymer, preferably at a temperature that is the glass transition temperature plus 5 to 20°C. I can do it. Here, if the temperature is set to a temperature lower than the glass transition temperature plus 5° C., it is not preferable because the molded product is too rigid and cannot be easily folded since it is lower than the glass transition temperature. If the temperature is set to exceed the glass transition temperature plus 20°C, shrinkage will occur due to the high temperature and the molded product will become smaller than the specified shape. This is undesirable because it becomes too flexible and cannot maintain its shape, making it difficult to fold neatly.
口部３は中心軸線Ｏを中心とする円筒状をなし、外周面に雄ねじ部３ａ、係止リング３ｂ及びネックリング３ｃを下方に向けてこの順に有する。雄ねじ部３ａは閉塞キャップや吐出器の装着キャップなどの図示しないキャップ部材を係止するために設けられる。なお雄ねじ部３ａに代えて、打栓によってキャップ部材を係止するための環状突起を設けてもよい。係止リング３ｂはキャップ部材の未開封状態を確認するためのタンパーエビデントバンドを係止するために設けられ、環状突起によって形成される。なお口部３は係止リング３ｂを設けない構成としてもよい。ネックリング３ｃは、例えば容器１の製造工程において搬送機によって搬送する際の係止部として利用される。なお口部３はネックリング３ｃを設けない構成としてもよい。口部３は円筒状以外の、例えば角筒状などの筒状をなす構成としてもよい。 The mouth portion 3 has a cylindrical shape centered on the central axis O, and has a male screw portion 3a, a locking ring 3b, and a neck ring 3c facing downward in this order on the outer peripheral surface. The male threaded portion 3a is provided for locking a cap member (not shown) such as a closure cap or a dispensing device mounting cap. Note that instead of the male threaded portion 3a, an annular projection for locking the cap member by plugging may be provided. The locking ring 3b is provided to lock a tamper evident band for confirming the unopened state of the cap member, and is formed by an annular projection. Note that the mouth portion 3 may be configured without the locking ring 3b. The neck ring 3c is used, for example, as a locking portion when the container 1 is transported by a transport machine in the manufacturing process. Note that the mouth portion 3 may be configured without the neck ring 3c. The mouth portion 3 may have a configuration other than a cylindrical shape, for example, a cylindrical shape such as a rectangular tube shape.
なお、本実施形態において、上下方向は中心軸線Ｏに沿う方向であり、径方向は中心軸線Ｏに直交する直線に沿う方向であり、周方向は中心軸線Ｏを周回する方向であり、水平断面は中心軸線Ｏに垂直な断面である。また本実施形態において特に断らずに説明する容器１の形状は、非折り畳み状態での形状を意味する。 In this embodiment, the vertical direction is a direction along the central axis O, the radial direction is a direction along a straight line perpendicular to the central axis O, and the circumferential direction is a direction going around the central axis O, and the horizontal cross section is is a cross section perpendicular to the central axis O. Further, in this embodiment, the shape of the container 1 described without particular mention means the shape in the unfolded state.
肩部４は中心軸線Ｏを中心とする筒状をなし、口部３の下端と胴部５の上端とを連ねる。肩部４の上端部は全周にわたって外側に膨出する膨出部４ａとして形成され、肩部４において上端部を除く部分は全周にわたって下方に向けて径方向外側に傾斜する傾斜部４ｂとして形成される。なお肩部４は膨出部４ａと傾斜部４ｂによって形成される構成に限らず、例えば、膨出部４ａのみ又は傾斜部４ｂのみによって形成される構成としてもよい。 The shoulder portion 4 has a cylindrical shape centered on the central axis O, and connects the lower end of the mouth portion 3 and the upper end of the body portion 5. The upper end portion of the shoulder portion 4 is formed as a bulging portion 4a that bulges outward over the entire circumference, and the portion of the shoulder portion 4 excluding the upper end portion is formed as an inclined portion 4b that slopes downward and radially outward over the entire circumference. It is formed. Note that the shoulder portion 4 is not limited to the structure formed by the bulge portion 4a and the slope portion 4b, but may be formed by, for example, only the bulge portion 4a or only the slope portion 4b.
胴部５は中心軸線Ｏを中心とする筒状をなし、肩部４の下端と底部６の外周縁とを連ねる。胴部５の周方向長さは口部３の周方向長さよりも大きい。なお、容器１は口部３、肩部４及び胴部５が共通の中心軸線Ｏを有する構成に限らない。 The body part 5 has a cylindrical shape centered on the central axis O, and connects the lower end of the shoulder part 4 and the outer peripheral edge of the bottom part 6. The circumferential length of the body portion 5 is greater than the circumferential length of the mouth portion 3. Note that the container 1 is not limited to a configuration in which the mouth portion 3, shoulder portion 4, and body portion 5 have a common central axis O.
胴部５の厚さは２５０～５００μｍであることが好ましい。胴部５の厚さが２５０μｍ未満の場合、加温により容器１を折り畳み状態から非折り畳み状態に復元させにくくなる。胴部５の厚さが５００μｍを超える場合、容器１を折り畳みにくくなり、また折り畳み状態を維持させにくくなる。 The thickness of the body portion 5 is preferably 250 to 500 μm. If the thickness of the body 5 is less than 250 μm, it becomes difficult to restore the container 1 from the folded state to the unfolded state by heating. When the thickness of the body 5 exceeds 500 μm, it becomes difficult to fold the container 1 and it becomes difficult to maintain the folded state.
底部６は胴部５の下端を閉塞する。底部６は容器１を正立姿勢で水平面に立てて置く時に水平面に接する接地部６ａを有する。なお、底部６は接地部６ａを有する構成に限らない。 The bottom part 6 closes the lower end of the body part 5. The bottom portion 6 has a grounding portion 6a that comes into contact with a horizontal surface when the container 1 is placed upright on a horizontal surface. Note that the bottom portion 6 is not limited to the configuration having the grounding portion 6a.
容器１は、肩部４と胴部５の全体が、第１水平方向（図１における横方向）に互いに対向する２つの第１側壁７と、第１水平方向に垂直な第２水平方向（図１における紙面に垂直な方向）に互いに対向する２つの第２側壁８とによって形成される、角形ボトル状をなす。肩部４と胴部５の全体は、上下方向の全長にわたり、第１側壁７と第２側壁８を周方向に交互に連ねて形成される。肩部４の傾斜部４ｂと胴部５において、第１側壁７と第２側壁８の連結部にはそれぞれ、径方向外側に凸となる角部が形成される。 The container 1 has a shoulder portion 4 and a body portion 5 that are entirely separated by two first side walls 7 facing each other in a first horizontal direction (lateral direction in FIG. 1) and a second horizontal direction (vertical to the first horizontal direction). It has a rectangular bottle shape formed by two second side walls 8 facing each other in a direction perpendicular to the plane of the paper in FIG. The entire shoulder portion 4 and body portion 5 are formed by first side walls 7 and second side walls 8 arranged alternately in the circumferential direction over the entire length in the vertical direction. In the inclined portion 4b of the shoulder portion 4 and the trunk portion 5, a corner portion convex radially outward is formed at the connection portion between the first side wall 7 and the second side wall 8, respectively.
２つの第１側壁７は全体として、中心軸線Ｏを通り第１水平方向に垂直な面に関し実質的に対称な構造を有する。また、２つの第１側壁７は全体として、中心軸線Ｏを通り第２水平方向に垂直な面に関し実質的に対称な構造を有する。２つの第２側壁８は全体として、中心軸線Ｏを通り第２水平方向に垂直な面に関し実質的に対称な構造を有する。また、２つの第２側壁８は全体として、中心軸線Ｏを通り第１水平方向に垂直な面に関し実質的に対称な構造を有する。 The two first side walls 7 as a whole have a substantially symmetrical structure with respect to a plane passing through the central axis O and perpendicular to the first horizontal direction. Furthermore, the two first side walls 7 as a whole have a substantially symmetrical structure with respect to a plane passing through the central axis O and perpendicular to the second horizontal direction. The two second side walls 8 as a whole have a substantially symmetrical structure with respect to a plane passing through the central axis O and perpendicular to the second horizontal direction. Furthermore, the two second side walls 8 as a whole have a substantially symmetrical structure with respect to a plane passing through the central axis O and perpendicular to the first horizontal direction.
なお、２つの第１側壁７と２つの第２側壁８は、上記のような実質的に対称な構造に限らない。 Note that the two first side walls 7 and the two second side walls 8 are not limited to the substantially symmetrical structure as described above.
容器１は、第２水平方向の幅が第１水平方向の幅よりも小さい扁平状をなす。つまり、２つの第１側壁７の第２水平方向の幅は、２つの第２側壁８の第１水平方向の幅よりも小さい。なお、容器１は上記のような扁平状をなす構成に限らない。 The container 1 has a flat shape in which the width in the second horizontal direction is smaller than the width in the first horizontal direction. That is, the width of the two first side walls 7 in the second horizontal direction is smaller than the width of the two second side walls 8 in the first horizontal direction. Note that the container 1 is not limited to the flat configuration described above.
第１水平方向において、各々の第２側壁８の幅は、少なくとも肩部４の傾斜部４ｂの上端から胴部５の下端までの全長にわたる部分において、口部３の幅よりも大きい。各々の第１側壁７は、少なくとも肩部４の傾斜部４ｂの上端から胴部５の下端部までの全長にわたる部分において、第２側壁８よりも第１水平方向の外側に迫り出した形状をなす。より具体的には、各々の第１側壁７は水平断面において外側に凸となるＶ字形状をなす。各々の第１側壁７は、胴部５の下端部において底部６まで下方に向けて第１水平方向の内側に傾斜して延びる傾斜面部７ａを有する。なお傾斜面部７ａを設けない構成としてもよい。 In the first horizontal direction, the width of each second side wall 8 is larger than the width of the mouth portion 3 at least in a portion extending over the entire length from the upper end of the sloped portion 4b of the shoulder portion 4 to the lower end of the body portion 5. Each first side wall 7 has a shape that protrudes outward in the first horizontal direction from the second side wall 8, at least in a portion extending over the entire length from the upper end of the inclined portion 4b of the shoulder portion 4 to the lower end of the body portion 5. Eggplant. More specifically, each first side wall 7 has a V-shape that is convex outward in a horizontal cross section. Each first side wall 7 has an inclined surface portion 7a that extends downward to the bottom portion 6 at the lower end of the body portion 5 and inwardly in the first horizontal direction. Note that a configuration may be adopted in which the inclined surface portion 7a is not provided.
各々の第２側壁８は、口部３よりも第２水平方向の外側に設けられる。また、各々の第２側壁８は胴部５において、上下方向の実質的な全長にわたり略平面状をなす。 Each second side wall 8 is provided outside the mouth portion 3 in the second horizontal direction. Further, each second side wall 8 has a substantially planar shape over substantially the entire length in the vertical direction in the body portion 5 .
２つの第１側壁７はそれぞれ、第１水平方向の外側に凸となり上下方向に延びる稜線によって形成される第１折り曲げ予定部９を有する。第１折り曲げ予定部９はそれぞれ、第１側壁７の第２水平方向の中央部において肩部４の傾斜部４ｂの上端から胴部５の下端部まで、より具体的には傾斜面部７ａの上端まで延在する。なお第１折り曲げ予定部９を胴部５の下端まで延在する構成としてもよい。 Each of the two first side walls 7 has a first bending portion 9 formed by a ridge line that is convex outward in the first horizontal direction and extends in the vertical direction. Each of the first bending portions 9 extends from the upper end of the inclined portion 4b of the shoulder portion 4 to the lower end of the body portion 5, more specifically at the upper end of the inclined surface portion 7a, at the center portion of the first side wall 7 in the second horizontal direction. extends up to Note that the first bending portion 9 may be configured to extend to the lower end of the body portion 5.
第１折り曲げ予定部９は稜線と同様の方向に延びる凹リブによって形成してもよい。この場合、凹リブは水平断面において第１水平方向の内側に凸となるＵ字形状又はＶ字形状をなす。 The first bending portion 9 may be formed by a concave rib extending in the same direction as the ridgeline. In this case, the concave rib has a U-shape or a V-shape that is convex inward in the first horizontal direction in the horizontal cross section.
２つの第２側壁８はそれぞれ、胴部５の上端部において、第１水平方向に延びる凹リブによって形成される第２折り曲げ予定部１０を有する。この場合、凹リブは第１水平方向に垂直な断面において第２水平方向の内側に凸となるＵ字形状又はＶ字形状をなす。第２折り曲げ予定部１０は凹リブと同様の方向に延びる稜線によって形成してもよい。本実施形態では、第２折り曲げ予定部１０を形成する凹リブは、胴部５の上端部に全周にわたって設けられる周リブの一部であり、当該周リブは下方に向けて縮径する段差部を形成する。なお、第２折り曲げ予定部１０を形成する凹リブの構成はこれに限らない。 Each of the two second side walls 8 has a second bent portion 10 formed by a concave rib extending in the first horizontal direction at the upper end of the body portion 5 . In this case, the concave rib has a U-shape or a V-shape that is convex inward in the second horizontal direction in a cross section perpendicular to the first horizontal direction. The second bent portion 10 may be formed by a ridge line extending in the same direction as the concave rib. In the present embodiment, the concave rib forming the second bending portion 10 is a part of a circumferential rib provided all around the upper end of the body 5, and the circumferential rib is a step whose diameter decreases downward. form a section. Note that the configuration of the concave ribs forming the second bending portion 10 is not limited to this.
２つの第２側壁８はそれぞれ、胴部５の下端部において、第１水平方向に延びる凹リブによって形成される第３折り曲げ予定部１１を有する。この場合、凹リブは第１水平方向に垂直な断面において第２水平方向の内側に凸となるＵ字形状又はＶ字形状をなす。第３折り曲げ予定部１１は凹リブと同様の方向に延びる稜線によって形成してもよい。本実施形態では、第３折り曲げ予定部１１を形成する凹リブは、第２側壁８の範囲内に限定して設けられる。なお、第３折り曲げ予定部１１を形成する凹リブの構成はこれに限らない。 Each of the two second side walls 8 has a third bent portion 11 formed by a concave rib extending in the first horizontal direction at the lower end of the body portion 5 . In this case, the concave rib has a U-shape or a V-shape that is convex inward in the second horizontal direction in a cross section perpendicular to the first horizontal direction. The third bending portion 11 may be formed by a ridgeline extending in the same direction as the concave rib. In this embodiment, the concave ribs forming the third bending portion 11 are provided only within the range of the second side wall 8 . Note that the configuration of the concave ribs forming the third bending portion 11 is not limited to this.
２つの第２側壁８はそれぞれ、第２折り曲げ予定部１０と第３折り曲げ予定部１１の間の領域を商品ラベルなどを設ける加飾領域として使用することができる。 In each of the two second side walls 8, the area between the second intended bending part 10 and the third intended bending part 11 can be used as a decorative area where a product label or the like is provided.
２つの第１側壁７はそれぞれ、胴部５の下端部において互いに同じ上下方向高さでそれぞれ第２水平方向の内側から外側に向けて上方に傾斜して延びる凹リブによって形成される２つの第４折り曲げ予定部１２を有する。この場合、凹リブは第２水平方向に垂直な断面において第１水平方向の内側に凸となるＵ字形状又はＶ字形状をなす。第４折り曲げ予定部１２は凹リブと同様の方向に延びる稜線によって形成してもよい。 The two first side walls 7 each have two concave ribs formed at the lower end of the body 5 by concave ribs that extend upwardly from the inside to the outside in the second horizontal direction at the same height in the vertical direction. It has four bent portions 12. In this case, the concave rib has a U-shape or a V-shape that is convex inward in the first horizontal direction in a cross section perpendicular to the second horizontal direction. The fourth bent portion 12 may be formed by a ridge line extending in the same direction as the concave rib.
図５～図６に示すように、容器１は、２つの第１側壁７をそれぞれ第１折り曲げ予定部９を折れ線部として内側に折り込む（つまり谷折りする）ことにより、折り畳み可能である。より具体的には容器１は、折り畳み工程において、非折り畳み状態から、２つの第１側壁７をそれぞれ、第１折り曲げ予定部９と２つの第４折り曲げ予定部１２をそれぞれ折れ線部として内側に折り込み、２つの第２側壁８をそれぞれ、第２折り曲げ予定部１０と第３折り曲げ予定部１１をそれぞれ折れ線部として内側に折り込むことにより、折り畳み状態とされる。 As shown in FIGS. 5 and 6, the container 1 can be folded by folding the two first side walls 7 inward using the first folding portions 9 as fold line portions (that is, valley folding). More specifically, in the folding process, the container 1 is folded inward from the non-folded state using the first folding portion 9 and the two fourth folding portions 12 as fold line portions. , the two second side walls 8 are brought into a folded state by folding them inward using the second bending portion 10 and the third bending portion 11 as fold line portions, respectively.
このような折り畳みは、第１折り曲げ予定部９を山折りした場合に比べ、第２水平方向に厚くなり、山折りに比べて折り返しが多くなるため、形状記憶ポリマーを用いない構成の場合では復元力が高まり易く、折り畳み状態を維持しにくくなる。また、第１折り曲げ予定部９を山折りにすると、第１水平方向の面積が大きくなり、保管・輸送の際に不利が生じ易くなる。本実施形態のような第１折り曲げ予定部９の谷折りを含む折り畳みと冷却後の形状記憶によれば、このような問題を回避することができる。 Such folding is thicker in the second horizontal direction than when the first folding planned portion 9 is mountain-folded, and there are more folds compared to mountain-folding, so in the case of a structure that does not use shape-memory polymer, it is difficult to restore. The force tends to increase, making it difficult to maintain the folded state. Moreover, if the first bending portion 9 is formed into a mountain fold, the area in the first horizontal direction becomes large, which tends to be disadvantageous during storage and transportation. According to the folding including the valley fold of the first planned folding portion 9 and the shape memory after cooling as in this embodiment, such problems can be avoided.
本発明は前述した実施形態に限定されず、その要旨を逸脱しない範囲で種々変更可能である。 The present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the gist thereof.
したがって、前述した実施形態の容器１は、形状記憶ポリマー又は形状記憶ポリマーとそれ以外の樹脂との混合物によって形成され、形状記憶ポリマーのガラス転移温度が４５～１００℃であり、口部３、肩部４、胴部５及び底部６をこの順に有する角形ボトル状をなし、互いに対向する２つの側壁をそれぞれ、上下方向に延びる稜線又は凹リブによって形成される折り曲げ予定部を折れ線部として内側に折り込むことにより、折り畳み可能な容器１である限り変更可能である。 Therefore, the container 1 of the embodiment described above is formed of a shape memory polymer or a mixture of a shape memory polymer and other resin, and the glass transition temperature of the shape memory polymer is 45 to 100°C, and the mouth part 3, the shoulder part It has the shape of a rectangular bottle having a section 4, a body section 5, and a bottom section 6 in this order, and the two side walls facing each other are each folded inward at the planned bending section formed by a ridge line or concave rib extending in the vertical direction as a fold line section. Therefore, changes can be made as long as the container 1 is foldable.
また、前述した実施形態の容器１の製造方法は、形状記憶ポリマー又は形状記憶ポリマーとそれ以外の樹脂との混合物を、形状記憶ポリマーのガラス転移温度以上の内面温度に設定した成形型を用いてブロー成形することで、口部３、肩部４、胴部５及び底部６をこの順に有する容器１を形成するブロー成形工程と、容器１を折り畳む折り畳み工程と、折り畳み状態の容器１をガラス転移温度未満まで冷却する冷却工程と、を有する、容器１の製造方法である限り変更可能である。 Further, the method for manufacturing the container 1 of the embodiment described above uses a mold in which a shape memory polymer or a mixture of a shape memory polymer and another resin is set to an inner surface temperature equal to or higher than the glass transition temperature of the shape memory polymer. A blow molding process of forming a container 1 having a mouth part 3, a shoulder part 4, a body part 5, and a bottom part 6 in this order by blow molding, a folding process of folding the container 1, and a glass transition process of the container 1 in the folded state. Modifications are possible as long as the method for manufacturing the container 1 includes a cooling step of cooling to below the temperature.
形状記憶ポリマーとしてＳＭＰテクノロジーズ社製のＭＭ－４５２０（Ｔｇ４５℃グレード、ポリウレタン系）を材料とするプリフォーム（前駆体）を用いた２軸延伸ブロー成形により、図１～図６に示す容器のサンプル１～３を製作した。サンプル１～３は胴部の厚さのみを相違させ、サンプル１は２５０μｍ、サンプル２は４００μｍ、サンプル３は５００μｍとした。ブロー成形工程ではプリフォーム温度を１３０℃とし、ブロー圧を２．５ＭＰａとし、金型内面温度を５５℃とした。容器の賦形後に折り畳み工程と冷却工程を行った。折り畳み工程はＴｇ以上となる５０℃で行った。なお、同様のサンプルを押し出しブロー成形によって形成する場合、例えば、押し出しパリソン温度を１３０～２００℃とし、ブロー圧を０．５ＭＰａとし、金型内面温度を５５℃とすることができる。 The container samples shown in Figures 1 to 6 were produced by biaxial stretch blow molding using a preform (precursor) made of MM-4520 (Tg 45°C grade, polyurethane type) manufactured by SMP Technologies as a shape memory polymer. I made 1 to 3. Samples 1 to 3 differed only in the thickness of the body, with sample 1 having a thickness of 250 μm, sample 2 having a thickness of 400 μm, and sample 3 having a thickness of 500 μm. In the blow molding process, the preform temperature was 130°C, the blow pressure was 2.5 MPa, and the mold inner surface temperature was 55°C. After shaping the container, a folding process and a cooling process were performed. The folding process was performed at 50° C., which is higher than Tg. Note that when a similar sample is formed by extrusion blow molding, for example, the extrusion parison temperature can be set to 130 to 200°C, the blow pressure can be set to 0.5 MPa, and the mold inner surface temperature can be set to 55°C.
そして、各々のサンプルについて、折り畳み（第１側面、つまり第１、第４折り曲げ予定部の折り込み、第２側面、つまり第２、第３折り曲げ予定部の折り込み）の容易性、折り畳み状態の持続性をそれぞれ評価した。その結果、サンプル１～３は、第１側面の折り込み容易性、第２側面の折り込み容易性、折り畳み状態の持続性のいずれも良好であった。 For each sample, the ease of folding (folding of the first side, that is, the first and fourth planned folding parts, and the folding of the second side, that is, the second and third planned folding parts), and the sustainability of the folded state were evaluated. were evaluated respectively. As a result, Samples 1 to 3 were good in terms of ease of folding on the first side, ease of folding on the second side, and durability of the folded state.
１ 容器
２ 収容空間
３ 口部
３ａ 雄ねじ部
３ｂ 係止リング
３ｃ ネックリング
４ 肩部
４ａ 膨出部
４ｂ 傾斜部
５ 胴部
６ 底部
６ａ 接地部
７ 第１側壁
７ａ 傾斜面部
８ 第２側壁
９ 第１折り曲げ予定部
１０ 第２折り曲げ予定部
１１ 第３折り曲げ予定部
１２ 第４折り曲げ予定部
Ｏ 中心軸線
1 Container 2 Accommodation space 3 Mouth part 3a Male screw part 3b Locking ring 3c Neck ring 4 Shoulder part 4a Swelling part 4b Inclined part 5 Body part 6 Bottom part 6a Grounding part 7 First side wall 7a Inclined surface part 8 Second side wall 9 First Planned bending part 10 Second planned bending part 11 Third planned bending part 12 Fourth planned bending part O Center axis line
Claims (4)
前記形状記憶ポリマーのガラス転移温度が４５～１００℃であり、
口部、肩部、胴部及び底部をこの順に有する角形ボトル状をなし、
互いに対向する２つの側壁をそれぞれ、上下方向に延びる稜線又は凹リブによって形成される折り曲げ予定部を折れ線部として内側に折り込むことにより、折り畳み可能な容器。 Formed by a shape memory polymer or a mixture of a shape memory polymer and another resin,
The shape memory polymer has a glass transition temperature of 45 to 100°C,
It is shaped like a square bottle with a mouth, a shoulder, a body and a bottom in this order,
A container that can be folded by folding two side walls facing each other inward using a bending portion formed by a ridge line or a concave rib extending in the vertical direction as a fold line portion.
前記容器を折り畳む折り畳み工程と、
折り畳み状態の前記容器を前記ガラス転移温度未満まで冷却する冷却工程と、を有する、容器の製造方法。 By blow molding a shape memory polymer or a mixture of a shape memory polymer and other resin using a mold whose inner surface temperature is set to the glass transition temperature or higher of the shape memory polymer, the mouth, shoulders, and body parts can be formed. and a blow molding step of forming a container having a bottom in this order;
a folding step of folding the container;
A method for manufacturing a container, comprising a cooling step of cooling the container in a folded state to below the glass transition temperature.
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| JP2022088898A JP2023176556A (en) | 2022-05-31 | 2022-05-31 | Container, and manufacturing method therefor |
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| JP2022088898A JP2023176556A (en) | 2022-05-31 | 2022-05-31 | Container, and manufacturing method therefor |
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