JP5020670B2 - Biaxial stretch blow molding bottle - Google Patents

Biaxial stretch blow molding bottle Download PDF

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JP5020670B2
JP5020670B2 JP2007079536A JP2007079536A JP5020670B2 JP 5020670 B2 JP5020670 B2 JP 5020670B2 JP 2007079536 A JP2007079536 A JP 2007079536A JP 2007079536 A JP2007079536 A JP 2007079536A JP 5020670 B2 JP5020670 B2 JP 5020670B2
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bottle
central axis
wall portion
main wall
biaxial stretch
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JP2008239176A (en
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忠和 中山
孝雄 黒澤
高雄 飯塚
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Yoshino Kogyosho Co Ltd
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Yoshino Kogyosho Co Ltd
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Description

本発明は、２軸延伸ブロー成形ボトルに関するものである。   The present invention relates to a biaxial stretch blow molded bottle.

この種の２軸延伸ブロー成形ボトルとして、例えば下記特許文献１に示されるように、筒状の口部、肩部および胴部と、有底筒状の底部とが合成樹脂で一体に形成されてなり、前記底部において前記胴部に連なりこのボトルの中心軸線方向に延びる周壁部は、横断面視が正方形状となるように、このボトルの周方向に隅部を介して連結された４つの主壁部により構成され、底部の底壁部において、その径方向内側は前記中心軸線方向の内方に向けて膨出する凹部とされるとともに、外周縁部は凹部の外周縁から当該ボトルの径方向に延びる接地部とされた構成が知られている。
特開２００４−３２３０８０号公報 As this type of biaxially stretched blow molded bottle, for example, as shown in Patent Document 1 below, a cylindrical mouth portion, a shoulder portion and a trunk portion, and a bottomed cylindrical bottom portion are integrally formed of a synthetic resin. The peripheral wall portion extending in the central axis direction of the bottle at the bottom portion and extending in the central axis direction of the bottle is connected to the four peripheral portions of the bottle through corners so that the cross-sectional view is a square shape. Consists of a main wall portion, and in the bottom wall portion of the bottom portion, the radially inner side is a concave portion that bulges inward in the central axis direction, and the outer peripheral edge portion is formed from the outer peripheral edge of the concave portion of the bottle. A configuration in which the grounding portion extends in the radial direction is known.
JP 2004-323080 A

しかしながら、前記従来の２軸延伸ブロー成形ボトルでは、主壁部の方が隅部よりもこのボトルの中心軸線からの距離が近いため、ブロー成形時における延伸の程度が、主壁部の方が隅部よりも小さくなっていた。したがって、主壁部の方が隅部よりも肉厚になることが影響して、接地部がボトルの中心軸線方向に波打つように変形し、２軸延伸ブロー成形ボトルの自立安定性が害されるという問題があった。  However, in the conventional biaxially stretched blow-molded bottle, the main wall portion is closer to the center axis of the bottle than the corner portion. It was smaller than the corner. Therefore, the main wall portion is thicker than the corner portion, so that the grounding portion is deformed so as to wave in the central axis direction of the bottle, and the self-supporting stability of the biaxial stretch blow molded bottle is impaired. There was a problem.

本発明は、このような事情を考慮してなされたもので、接地部が波打つのを抑えて、自立安定性を向上させることができる２軸延伸ブロー成形ボトルを提供することを目的とする。   The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a biaxial stretch blow-molded bottle that can suppress the undulation of the grounding portion and improve the self-supporting stability.

上記課題を解決して、このような目的を達成するために、本発明のボトルは、筒状の口部、肩部および胴部と、有底筒状の底部とが合成樹脂で一体に形成されてなり、前記底部において前記胴部に連なりこのボトルの中心軸線方向に延びる周壁部は、横断面視が正方形状となるように、このボトルの周方向に隅部を介して連結された４つの主壁部により構成され、前記底部の底壁部において、その径方向内側は前記中心軸線方向の内方に向けて膨出する凹部とされるとともに、外周縁部は前記凹部の外周縁から当該ボトルの径方向に延びる接地部とされた２軸延伸ブロー成形ボトルであって、前記接地部の内周縁から前記中心軸線方向の内方に向けて延びる前記凹部の側壁部において、前記主壁部に接地部を介してこのボトルの径方向で連なる部分には、前記中心軸線方向の外方に向けて突出する突出部が設けられ、前記突出部は、４つの前記主壁部に対応して４つ設けられるとともに、隣接する前記突出部同士は離間して配置され、前記突出部は、前記接地部よりも前記中心軸線方向の内方に位置するとともに、このボトルの周方向に沿って前記各主壁部の全長に亘って前記主壁部と各別に平行に延在し、前記突出部のうち前記主壁部に沿う延在方向の両端部は、前記主壁部に沿う延在方向の外側に向かうに従い前記中心軸方向に沿う大きさが漸次小さくなっていることを特徴とする。
この発明によれば、前記凹部の側壁部において主壁部に接地部を介してこのボトルの径方向で連なる部分に、前記突出部が設けられているので、底部において、主壁部が位置する部分のブロー成形時における延伸の程度を大きくして、隅部が位置する部分における前記延伸の程度に近付けることが可能になる。したがって、底部における前記延伸の程度が、このボトルの周方向でばらつくのを抑えることが可能になり、接地部が前記中心軸線方向に波打つのを防ぐことができる。

In order to solve the above problems and achieve such an object, the bottle of the present invention has a cylindrical mouth portion, a shoulder portion and a trunk portion, and a bottomed cylindrical bottom portion formed integrally with a synthetic resin. The peripheral wall portion extending in the central axis direction of the bottle connected to the body portion at the bottom portion is connected via a corner portion in the circumferential direction of the bottle so that the cross-sectional view is a square shape. In the bottom wall portion of the bottom portion, the radially inner side is a concave portion that bulges inward in the central axis direction, and the outer peripheral edge portion is formed from the outer peripheral edge of the concave portion. A biaxial stretch blow-molded bottle that is a ground contact portion extending in a radial direction of the bottle, wherein the main wall is formed on a side wall portion of the concave portion extending inward in the central axis direction from an inner peripheral edge of the ground contact portion. This bottle is connected in the radial direction of the bottle via the grounding part. In part, the projecting portion is provided that projects outward of the central axis line direction, the protruding portion, together are 4 provided corresponding to the four of the main wall portion, the protruding portion adjacent to the The main wall portion is disposed so as to be spaced apart, and the projecting portion is positioned inward in the central axis direction with respect to the grounding portion, and extends over the entire length of each main wall portion along the circumferential direction of the bottle. and extend parallel to each other, the extending direction of the both end portions along the main wall portion of the protrusion size along the axial direction toward the outside of the extending direction along the main wall portion Is characterized by gradually decreasing.
According to the present invention, since the protruding portion is provided at a portion of the side wall portion of the recess that is connected to the main wall portion in the radial direction of the bottle via the grounding portion, the main wall portion is located at the bottom portion. It becomes possible to increase the degree of stretching at the time of blow molding of the part and to approach the degree of stretching at the part where the corner is located. Therefore, it is possible to prevent the degree of stretching at the bottom from varying in the circumferential direction of the bottle, and the grounding portion can be prevented from undulating in the central axis direction.

また、前記凹部は、底面視円形で、かつ前記側壁部が半球面状のドーム形状となってもよい。
この場合、前述の作用効果が顕著に奏功されることになる。 The concave portion may be a dome shape having a circular shape in a bottom view and the side wall portion being a hemispherical shape.
In this case, the above-described effects are remarkably achieved.

この発明に係る２軸延伸ブロー成形ボトルによれば、接地部が波打つのを抑えて、自立安定性を向上させることができる。   According to the biaxially stretched blow-molded bottle according to the present invention, the ground contact portion can be prevented from undulating and the self-supporting stability can be improved.

以下、図面を参照し、この発明の実施の形態について説明する。本実施形態に係る２軸延伸ブロー成形ボトル１０は、筒状の口部、肩部および胴部１３と、有底筒状の底部１４とを備え、これらがそれぞれの中心軸線を共通軸上に位置させられた状態で、この共通軸方向の上方から下方に向けてこの順に連設された概略構成とされている。
なお、このボトル１０は、２軸延伸ブロー成形により例えばポリエチレンテレフタレート等の合成樹脂で一体に形成されている。 Embodiments of the present invention will be described below with reference to the drawings. The biaxially stretched blow-molded bottle 10 according to the present embodiment includes a cylindrical mouth portion, a shoulder portion, and a body portion 13 and a bottomed cylindrical bottom portion 14, which have respective central axes on a common axis. It is set as the schematic structure connected in this order from the upper direction of this common axial direction to the downward direction in the state made to position.
The bottle 10 is integrally formed of a synthetic resin such as polyethylene terephthalate by biaxial stretch blow molding.

本実施形態では、胴部１３および底部１４は、横断面形状が正方形状となっており、前記共通軸はこの横断面がなす正方形状の中央部を通る直線となっている。以下、この共通軸を中心軸線Ｏという。
図示の例では、底部１４において胴部１３に連なり前記中心軸線Ｏ方向の下方に延びる周壁部２０、および胴部１３は、横断面視が前述のように正方形状となるように、このボトル１０の周方向に隅部１６を介して連結された４つの主壁部１５により構成されている。なお、主壁部１５は概略平面状とされるとともに、隅部１６はこのボトル１０の径方向外方に向けて凸の曲面状に形成されている。 In this embodiment, the trunk | drum 13 and the bottom part 14 have a square cross-sectional shape, and the said common axis is a straight line which passes along the square-shaped center part which this cross section makes. Hereinafter, this common axis is referred to as a central axis O.
In the example shown in the figure, the bottle 10 is formed so that the peripheral wall 20 and the barrel 13 that are continuous with the barrel 13 at the bottom 14 and extend downward in the direction of the central axis O are square as described above. It is comprised by the four main wall parts 15 connected via the corner part 16 in the circumferential direction. The main wall portion 15 has a substantially flat shape, and the corner portion 16 is formed in a curved shape that is convex outward in the radial direction of the bottle 10.

また、底部１４の底壁部１７において、その径方向内側には前記中心軸線Ｏ方向の内方に向けて膨出する凹部１８が形成されるとともに、外周縁部は凹部１８の外周縁Ｌ１から当該ボトル１０の径方向外方に向けて延びる平坦な接地部１９となっている。この接地部１９の外周縁Ｌ２に、底部１４の周壁部２０における前記中心軸線Ｏ方向の下端が滑らかに連結されている。また、図示の例では、凹部１８は、底面視円形で、かつ接地部１９の内周縁、つまり凹部１８の外周縁Ｌ１から前記中心軸線Ｏ方向の内方に向けて延びる側壁部１８ａが半球面状のドーム形状に形成されている。  In addition, in the bottom wall portion 17 of the bottom portion 14, a concave portion 18 that bulges inward in the central axis O direction is formed on the radially inner side, and the outer peripheral edge portion extends from the outer peripheral edge L 1 of the concave portion 18. The flat grounding portion 19 extends outward in the radial direction of the bottle 10. A lower end of the peripheral wall portion 20 of the bottom portion 14 in the direction of the central axis O is smoothly connected to the outer peripheral edge L2 of the ground contact portion 19. In the illustrated example, the concave portion 18 has a circular shape in a bottom view, and a side wall portion 18 a extending from the inner peripheral edge of the ground contact portion 19, that is, the outer peripheral edge L 1 of the concave portion 18 toward the inner side in the direction of the central axis O. It is formed in a dome shape.

なお、接地部１９は底面視円環状になっている。また、接地部１９の外周縁Ｌ２と前記中心軸線Ｏとの前記径方向における距離は、接地部１９の外周縁Ｌ２において、主壁部１５における前記周方向の中央部に連なる部分で最も近く、隅部１６における前記周方向の中央部に連なる部分で最も遠くなっている。これにより、接地部１９のこのボトル１０の径方向における大きさ、つまり幅は、主壁部１５における前記周方向の中央部に連なる部分で最も狭く、隅部１６における前記周方向の中央部に連なる部分で最も広くなっている。  The grounding portion 19 has an annular shape when viewed from the bottom. Further, the radial distance between the outer peripheral edge L2 of the ground contact portion 19 and the central axis O is closest to the outer peripheral edge L2 of the ground contact portion 19 at a portion connected to the central portion in the circumferential direction of the main wall portion 15; It is farthest from the corner 16 where it is connected to the central portion in the circumferential direction. Thereby, the size in the radial direction of the bottle 10, that is, the width of the grounding portion 19 is the narrowest at the portion connected to the central portion in the circumferential direction of the main wall portion 15, and the central portion in the circumferential direction at the corner portion 16. It is the widest in the series.

そして、本実施形態では、凹部１８の側壁部１８ａにおいて、主壁部１５に接地部１９を介してこのボトル１０の径方向で連なる部分には、前記中心軸線Ｏ方向の外方に向けて突出する突出部２１が設けられている。また、この突出部２１は、接地部１９よりも前記中心軸線Ｏ方向の内方に位置している。   In the present embodiment, a portion of the side wall 18a of the recess 18 that is continuous with the main wall 15 via the grounding portion 19 in the radial direction of the bottle 10 protrudes outward in the direction of the central axis O. Protruding portion 21 is provided. Further, the protruding portion 21 is located inward of the central axis O direction with respect to the grounding portion 19.

突出部２１は、図３に示されるように、凹部１８の側壁部１８ａからこのボトル１０の径方向内方に向けて突出した下端面２１ａと、凹部１８の側壁部１８ａから前記中心軸線Ｏ方向の下方に向けて突出した内側端面２１ｂと、を備え、下端面２１ａの前記径方向の内方端と、内側端面２１ｂの前記中心軸線Ｏ方向の下端とが滑らかに連結した構成とされている。
さらに、この突出部２１は、凹部１８の側壁部１８ａにおける前記中心軸線Ｏ方向の中央部に設けられ、接地部１９と突出部２１の下端面２１ａとの前記中心軸線Ｏ方向における距離は、突出部２１の内側端面２１ｂにおける前記中心軸線Ｏ方向の大きさと同等になっている。また、突出部２１の下端面２１ａの前記径方向における大きさは、凹部１８の開口径の例えば約１０分の１となっている。 As shown in FIG. 3, the protruding portion 21 includes a lower end surface 21 a protruding from the side wall portion 18 a of the concave portion 18 toward the radially inner side of the bottle 10, and the central axis O direction from the side wall portion 18 a of the concave portion 18. An inner end surface 21b protruding downward, and the radially inner end of the lower end surface 21a and the lower end of the inner end surface 21b in the central axis O direction are smoothly connected. .
Further, the projecting portion 21 is provided at a central portion of the side wall portion 18a of the concave portion 18 in the direction of the central axis O, and the distance between the ground contact portion 19 and the lower end surface 21a of the projecting portion 21 in the central axis O direction The inner end surface 21b of the portion 21 is equivalent to the size in the direction of the central axis O. Further, the size of the lower end surface 21a of the protruding portion 21 in the radial direction is, for example, about 1/10 of the opening diameter of the recess 18.

さらに、突出部２１は、凹部１８の側壁部１８ａに、このボトル１０の周方向に沿って主壁部１５と平行に連続して延設されており、その延設方向の両端部は、他の突出部２１における延設方向の端部から離れている。これにより、凹部１８の側壁部１８ａにおいて、隅部１６における前記周方向の中央部に接地部１９を介して前記径方向で連なる部分には、突出部２１が形成されておらず、図４に示されるような平滑な半球面状をなしている。   Further, the protruding portion 21 is continuously extended in parallel with the main wall portion 15 along the circumferential direction of the bottle 10 on the side wall portion 18a of the concave portion 18, and both end portions in the extending direction are the other portions. This is away from the end of the protruding portion 21 in the extending direction. Thereby, in the side wall part 18a of the recessed part 18, the protrusion part 21 is not formed in the part which continues in the said radial direction via the grounding part 19 in the center part of the said circumferential direction in the corner part 16, FIG. It has a smooth hemispherical shape as shown.

以上説明したように本実施形態に係る２軸延伸ブロー成形ボトル１０によれば、凹部１８の側壁部１８ａにおいて主壁部１５に接地部１９を介してこのボトル１０の径方向で連なる部分に、突出部２１が設けられているので、底部１４において、主壁部１５が位置する部分のブロー成形時における延伸の程度を大きくして、隅部１６が位置する部分における前記延伸の程度に近付けることが可能になる。したがって、底部１４における前記延伸の程度が、このボトル１０の周方向でばらつくのを抑えることが可能になり、接地部１９が前記中心軸線Ｏ方向に波打つのを防ぐことができる。   As described above, according to the biaxially stretched blow-molded bottle 10 according to the present embodiment, the side wall portion 18a of the recess 18 is connected to the main wall portion 15 via the grounding portion 19 in the radial direction of the bottle 10. Since the protruding portion 21 is provided, the extent of stretching at the time of blow molding of the portion where the main wall portion 15 is located in the bottom portion 14 is increased to approach the extent of the stretching at the portion where the corner portion 16 is located. Is possible. Therefore, it is possible to prevent the degree of stretching at the bottom 14 from varying in the circumferential direction of the bottle 10, and to prevent the ground contact portion 19 from undulating in the direction of the central axis O.

なお、本発明の技術的範囲は前記実施の形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。
例えば、前記実施形態では、凹部１８として底面視円形で、かつ側壁部１８ａが半球面状のドーム形状を示したが、これに限らず例えば、底面視多角形状で、かつ側壁部１８ａが複数の平板で構成された角錐状の凹部を採用してもよいし、あるいは底面視多角形状で、かつ側壁部１８ａが複数の曲面板で構成された凹部を採用してもよい。
さらに、接地部１９は前記実施形態に限らず例えば底面視多角形の環状にしてもよい。 The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the concave portion 18 has a circular dome shape in the bottom view and the side wall portion 18a has a hemispherical dome shape. However, the present invention is not limited thereto. A pyramid-shaped concave portion made of a flat plate may be adopted, or a concave portion having a polygonal shape in a bottom view and a side wall portion 18a made of a plurality of curved plates may be adopted.
Furthermore, the ground contact portion 19 is not limited to the above embodiment, and may be, for example, a polygonal ring shape in a bottom view.

また、前記実施形態に代えて、凹部１８の側壁部１８ａにおいて、隅部１６に接地部１９を介して前記径方向で連なる部分の全域を、図４に示されるような平滑な半球面状にしてもよい。
さらに、突出部２１は、前記実施形態に限らず、例えばこのボトル１０の周方向に沿って主壁部１５と平行に断続的に点在させてもよいし、あるいは凹部１８の側壁部１８ａにおいて前記中心軸線Ｏ方向の上側の部分若しくは下側の部分に設けてもよい。 Further, instead of the embodiment, in the side wall portion 18a of the concave portion 18, the entire area of the portion continuous in the radial direction with the corner portion 16 via the grounding portion 19 is formed into a smooth hemispherical shape as shown in FIG. May be.
Further, the protruding portion 21 is not limited to the above-described embodiment, and for example, the protruding portion 21 may be intermittently scattered in parallel with the main wall portion 15 along the circumferential direction of the bottle 10, or in the side wall portion 18 a of the recessed portion 18. You may provide in the upper part or the lower part of the said central axis O direction.

また、突出部２１の寸法や形状は、２軸延伸ブロー成形ボトル１０の寸法や形状、あるいはこのボトル１０に充填する内容物等に応じて適宜設定されるものであり、例えば加熱状態にある内容物を充填したときに、突出部２１が接地部１９よりも前記中心軸線Ｏ方向の下方に突出することなく、また、ブロー成形時に突出部２１の肉厚が薄くなりすぎたり、あるいは突出部２１が破れたりすることなく、前述のように底部１４における延伸の程度の前記周方向におけるばらつきを抑えることができれば、前記実施形態に限られるものではない。   Further, the size and shape of the protruding portion 21 are appropriately set according to the size and shape of the biaxially stretched blow molded bottle 10 or the contents to be filled in the bottle 10. For example, the content in a heated state When the object is filled, the protrusion 21 does not protrude below the ground axis 19 in the direction of the central axis O, and the thickness of the protrusion 21 becomes too thin during blow molding, or the protrusion 21 If the variation in the circumferential direction of the degree of stretching at the bottom 14 can be suppressed as described above without tearing, the invention is not limited to the above embodiment.

接地部が波打つのを抑えて、自立安定性を向上させることができる。  It is possible to improve the self-supporting stability by suppressing the undulation of the grounding portion.

本発明に係る一実施形態として示した２軸延伸ブロー成形ボトルにおいて胴部および底部の側面図である。It is a side view of a trunk part and a bottom in a biaxial stretch blow molding bottle shown as one embodiment concerning the present invention. 図１に示す２軸延伸ブロー成形ボトルの底面図である。It is a bottom view of the biaxial stretch blow molding bottle shown in FIG. 図２に示す底部のＡ−Ａ線矢視縦断面図である。It is an AA arrow longitudinal cross-sectional view of the bottom part shown in FIG. 図２に示す底部のＢ−Ｂ線矢視縦断面図である。FIG. 3 is a vertical cross-sectional view of the bottom shown in FIG.

符号の説明Explanation of symbols

１０ ２軸延伸ブロー成形ボトル
１３ 胴部
１４ 底部
１５ 主壁部
１６ 隅部
１７ 底壁部
１８ 凹部
１８ａ 凹部の側壁部
１９ 接地部
２０ 周壁部
２１ 突出部
Ｌ１ 凹部の外周縁、接地部の内周縁
Ｏ 中心軸線

DESCRIPTION OF SYMBOLS 10 Biaxial stretch blow molding bottle 13 Body part 14 Bottom part 15 Main wall part 16 Corner part 17 Bottom wall part 18 Recessed part 18a Side wall part of a recessed part 19 Grounding part 20 Peripheral wall part 21 Projection part L1 The outer periphery of a recessed part, the inner periphery of a grounding part O Center axis

Claims (2)

筒状の口部、肩部および胴部と、有底筒状の底部とが合成樹脂で一体に形成されてなり、
前記底部において前記胴部に連なりこのボトルの中心軸線方向に延びる周壁部は、横断面視が正方形状となるように、このボトルの周方向に隅部を介して連結された４つの主壁部により構成され、
前記底部の底壁部において、その径方向内側は前記中心軸線方向の内方に向けて膨出する凹部とされるとともに、外周縁部は前記凹部の外周縁から当該ボトルの径方向に延びる接地部とされた２軸延伸ブロー成形ボトルであって、
前記接地部の内周縁から前記中心軸線方向の内方に向けて延びる前記凹部の側壁部において、前記主壁部に接地部を介してこのボトルの径方向で連なる部分には、前記中心軸線方向の外方に向けて突出する突出部が設けられ、
前記突出部は、４つの前記主壁部に対応して４つ設けられるとともに、隣接する前記突出部同士は離間して配置され、
前記突出部は、前記接地部よりも前記中心軸線方向の内方に位置するとともに、このボトルの周方向に沿って前記各主壁部の全長に亘って前記主壁部と各別に平行に延在し、
前記突出部のうち前記主壁部に沿う延在方向の両端部は、前記主壁部に沿う延在方向の外側に向かうに従い前記中心軸方向に沿う大きさが漸次小さくなっていることを特徴とする２軸延伸ブロー成形ボトル。 The cylindrical mouth, shoulder and trunk, and the bottomed cylindrical bottom are integrally formed of synthetic resin,
The peripheral wall portion that is connected to the body portion at the bottom and extends in the direction of the central axis of the bottle has four main wall portions that are connected via a corner portion in the circumferential direction of the bottle so that the cross-sectional view is a square shape. Composed of
In the bottom wall portion of the bottom portion, the radially inner side is a concave portion that bulges inward in the central axis direction, and the outer peripheral edge portion is a ground contact extending from the outer peripheral edge of the concave portion in the radial direction of the bottle. A biaxial stretch blow molded bottle
In the side wall portion of the recess that extends inward in the central axis direction from the inner peripheral edge of the ground contact portion, the portion that is continuous with the main wall portion in the radial direction of the bottle via the ground contact portion is in the central axis direction. Protruding part that protrudes outward is provided,
The four protrusions are provided corresponding to the four main wall portions, and the adjacent protrusions are spaced apart from each other,
The protrusion is configured to position inwardly of the central axis line direction than the grounding portion, extending in parallel to another each with the main wall portion over the entire length of the respective main wall along the circumferential direction of the bottle Exist,
The both end portions in the extending direction along the main wall portion of the projecting portions are gradually reduced in size along the central axis direction toward the outside in the extending direction along the main wall portion. A biaxial stretch blow molded bottle. 請求項１記載の２軸延伸ブロー成形ボトルであって、
前記凹部は、底面視円形で、かつ前記側壁部が半球面状のドーム形状となっていることを特徴とする２軸延伸ブロー成形ボトル。 A biaxial stretch blow molded bottle according to claim 1,
The biaxially stretched blow-molded bottle characterized in that the concave portion is circular in a bottom view and the side wall portion has a hemispherical dome shape.
JP2007079536A 2007-03-26 2007-03-26 Biaxial stretch blow molding bottle Active JP5020670B2 (en)

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JP5454850B2 (en) * 2008-12-26 2014-03-26 株式会社吉野工業所 Container body for pump
JP5454851B2 (en) * 2008-12-26 2014-03-26 株式会社吉野工業所 Container body for pump
JP5476084B2 (en) * 2009-09-30 2014-04-23 株式会社吉野工業所 Synthetic resin container with inverted and folded bottom wall
EP2933206B1 (en) 2008-12-25 2016-06-08 Yoshino Kogyosho Co., Ltd. Synthetic resin container having inverted, folded back bottom wall
JP5454849B2 (en) * 2008-12-25 2014-03-26 株式会社吉野工業所 Container body for pump
US9242762B2 (en) 2010-10-26 2016-01-26 Yoshino Kogyosho Co., Ltd. Bottle

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JPH0735085B2 (en) * 1990-10-05 1995-04-19 日精エー・エス・ビー機械株式会社 Biaxially stretched crystalline resin container and method for producing the same
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