JP4201100B2 - Plastic bottle - Google Patents

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Publication number
JP4201100B2
JP4201100B2 JP2000016361A JP2000016361A JP4201100B2 JP 4201100 B2 JP4201100 B2 JP 4201100B2 JP 2000016361 A JP2000016361 A JP 2000016361A JP 2000016361 A JP2000016361 A JP 2000016361A JP 4201100 B2 JP4201100 B2 JP 4201100B2
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Japan
Prior art keywords
bottle
wall
arc
column
plastic bottle
Prior art date
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JP2000016361A
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Japanese (ja)
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JP2001206331A (en
Inventor
知之 小澤
豊治 加藤
正昭 佐々木
弘章 杉浦
高雄 飯塚
寛 内田
忠和 中山
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Yoshino Kogyosho Co Ltd
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Yoshino Kogyosho Co Ltd
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Priority to JP2000016361A priority Critical patent/JP4201100B2/en
Priority to US09/837,206 priority patent/US20010030166A1/en
Publication of JP2001206331A publication Critical patent/JP2001206331A/en
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Classifications

    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • 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
    • B65D23/00—Details of bottles or jars not otherwise provided for
    • B65D23/10—Handles
    • B65D23/102—Gripping means formed in the walls, e.g. roughening, cavities, projections
    • 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
    • B65D2501/00—Containers having bodies formed in one piece
    • B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
    • B65D2501/0018—Ribs
    • B65D2501/0027—Hollow longitudinal ribs
    • 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
    • B65D2501/00—Containers having bodies formed in one piece
    • B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
    • B65D2501/0018—Ribs
    • B65D2501/0036—Hollow circonferential ribs

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、プラスチックボトル、とくに内容液を加熱充填するためのプラスチックボトルに関する。
【０００２】
【従来の技術】
飲料液を加熱充填するため、胴部に減圧吸収面を形成したプラスチックボトルは従来より周知であり、その胴部の角部を円弧面とした六面体のボトルが市販されている。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記従来の六面体のボトルでは、その周壁をシュリンクラベルで包装すると、ラベルの周面が六分割されることになり、ラベルの投影面積は、ラベル面積に対して小さくなっている。
ラベルの印刷面を二面分とすると、印刷面の中心を通る放射線上の方向から見ると、印刷面を一望のもとにおいて表示内容をみることができるが、印刷面が三面に渡ると両面の印刷面が見づらくなるので、印刷内容を見るのに容器を廻さなければならないという問題があった。
【０００４】
デザイン面を自由にとり、印刷内容を見易くするために六面体をさらに円形に近づけ、面体の数を多くとることが考えられるが、面数を多くすると、それに応じて減圧吸収面の面積が少なくなり、減圧吸収量が減少するので、高温による加熱充填ボトルには採用できず、多面体のボトルとしては、六角形が限度と考えられていた。
【０００５】
本発明は、上記の問題点を考慮し、包装フィルムのデザインと印刷内容を見易くするため、ボトル胴部の面の数を多くするとともに、減圧吸収量を従来の六面体ボトルと同様になるようにした加熱充填ボトルを提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明は、上記の課題を解決するため、減圧吸収面を備えたプラスチックボトルとして、ボトル胴部がその断面を八角形とし、各角部に円弧壁面を形成し、各円弧壁面の間に傾斜壁と平坦壁とからなる減圧吸収面を配設した加熱充填可能な八面体のボトルであって、円弧壁面の両側に接続された傾斜壁のなす柱角度が、６０゜〜１１５゜の範囲としたことを特徴とする構成を採用する。
【０００７】
減圧吸収面を補強するために、平坦壁に断面弧状の凹リブまたは凸リブを設けたことを特徴とする構成を採用する。
【０００８】
【発明の実施の形態】
次に、本発明の第１実施形態について、図面を参照して説明する。
図１において、Ａはボトルであり、ＰＥＴその他の合成樹脂を用いて延伸ブロー成形され、内容液を加熱充填できる八面体のボトルである。
ボトルＡは、口部１と肩部２、断面が八角形の胴部３と底部４とからなっており、口部１外周には、ねじ５が螺設され、その下方にネックリング６が突設されている。
【０００９】
胴部３と肩部２との境目には、横リブ７が配設され、その下側は、細巾の円周面８となっており、胴部３と底部４との境目には、横リブ９が配設され、その上側は細巾の円周面１０となっている。
円周面８と円周面１０との間の胴部３は断面が八角形となっており、各角部には、円周面８と円周面１０とを結び、軸方向に延びる円弧壁面１１が形成され、全ての隣り合う円弧壁面１１の間には、減圧吸収面１２が形成されている。
【００１０】
減圧吸収面１２は、図２に示すように、隣り合う円弧壁面１１の側縁１３と上下の円周面８，１０に接続され、傾斜壁１４と該傾斜壁１４の内側の側縁１５ａ，ｂ，ｃ，ｄに接続するわずかに湾曲した平担壁１６とからなっている。
平坦壁１６としては、わずかに湾曲した壁面とともに、平面状の壁面であってもよい。
平坦壁１６には、上下を円弧とし、縦方向に延びる二辺からなる断面が弧状のリブ１７が設けられている。
【００１１】
底部４は、横リブ９に続く底部周壁２０と底端壁２１、底端壁２１より上方へ凹んだ底壁２２とからなっている。
底部周壁２０の中間には、横リブ２３が設けられており、底壁２２には、公知の放射状の補強リブが複数個設けられている。
【００１２】
次に、胴部３の円弧壁面１１と減圧吸収面１２との構造の詳細と、それに基づく作用効果について、図３を参照して説明する。
前記円弧壁面１１と、その両側の傾斜壁１４ａ，ｂによって、胴部３の剛性を強化する柱部が形成され、二つの傾斜壁１４ａ，１４ｂのなす角度によって柱角度αが形成されている。
本実施形態では、柱角度αを、６０゜〜１１５゜の範囲、好ましくは７５゜以上としている。
【００１３】
本実施形態のボトルは、容量５００ｍｌ用の容器として３２ｇ以下の樹脂重量を用いて成形されており、ボトル胴部の直径またはそれと同一となる円弧壁面１１の直径Ｄを６８ｍｍ、円弧壁面１１の巾ｗを５．３５ｍｍ、円弧壁面１１間の距離Ｗを２１ｍｍ、円弧壁面１１の円周面と平坦壁１６との間の距離を２．９９ｍｍとしている。
【００１４】
上記ボトル胴部の各部の寸法数値は、一つの実施例であって、ボトルの容量、デザイン、直径の変更に応じて、数値を変えることができる。
その値を直径Ｄとの関係で表すと、Ｗ＝１／３．５〜１／２．８Ｄ、Ｈ＝１／２５〜１／１５Ｄの範囲とし、ｗ＝１〜６ｍｍの範囲とすることができる。
従来の六面体胴部の場合、柱角度αは、０〜４５゜の範囲で、減圧吸収量は３０ｃｃ前後であるが、実施形態では、柱角度αを大きくし、６０゜〜１１５゜の範囲、とくに７５゜以上にすることによって、柱部の剛性を得るとともに、六面体ボトルと同様の減圧吸収量を確保することができた。
【００１５】
また、平坦壁１６にリブ１７を配設したことによって成形時に平坦壁１６を安定させるようにして、良好な成形面とすることができ、また平坦壁１６とともに傾斜壁１４を補強し、傾斜壁１４の補強によって柱部の剛性を強化する。
【００１６】
次に、本発明の作用効果について試験例をあげ、説明する。
〔試験例〕
ＰＥＴを素材樹脂として、形成した樹脂重量３２ｇのプリフォームを二軸延伸ブロー成形して、全内容積が５２９ｍｌの八面体のＰＥＴボトルを成形した。
各寸法は、直径Ｄ＝６８ｍｍ，Ｈ＝２．９９ｍｍ，Ｗ＝２１ｍｍ，ｗ＝５．３５ｍｍとし、柱角度を、１５゜，４０゜，６０゜，７５゜，９５゜とした試験用ボトルを５種作成した。
【００１７】
各試験用ボトルに、実充填と同等の熱的条件を与えた後に水を満量まで充填し、口部を封印して密封した状態から、注射針等で中味を一定量づつ減量させていき、柱部がその形状を維持できる限界の容量（減圧吸収量）を測定した。
その結果は、表１に示すとおりであり、グラフにとると図４に示すようになる。
【００１８】
【表１】

Figure 0004201100
【００１９】
試験結果から見ると、柱角度αを７５゜以上とすると、柱部の剛性を強化され、
六面体と同等の減圧吸収量を得られることがわかる。
【００２０】
柱角度αが１１５゜の場合は、減圧吸収量が７５゜の場合よりも増大することは、グラフから見てもわかることである。
６０゜の場合は、７５゜よりやや劣るが約１０％低下するだけで、減圧吸収面として採用できることは試験結果からわかる。
【００２１】
上記の試験品は、Ｈ，Ｗ，ｗを特定の寸法としたが、直径Ｄに対して、Ｈ＝１／２５〜１／１５Ｄ，Ｗ＝１／３．５〜１／２．８Ｄの範囲であれば、上記試験結果とほぼ同等の減量吸収量を得ることができる。
【００２２】
前記実施形態では、胴部が八面体のボトルについて説明したが、ボトル胴部が、その断面が七面体のボトル、または九面体のボトルであってもよい。
また、六面体のボトルに適用することによって、従来のものより減圧吸収量を高めることができる。
【００２３】
【発明の効果】
本発明は、上記のように構成されているから、次の効果を奏する。
胴部が八面体のボトルにおいて、柱角度を、６０゜〜１１５゜の範囲とすることによって、六面体ボトルと同等の減圧吸収量が確保するとともに、柱部の剛性も強化することができた。
そのことによって、シュリンクラベルの印刷面の投影面積を大きくすることができ、ラベルの印刷面を見易くすることができた。
【図面の簡単な説明】
【図１】本発明ボトルの正面図である。
【図２】図１のＡ−Ａ線における断面図である。
【図３】減圧吸収面の拡大説明図である。
【図４】減圧吸収面のグラフである。
【符号の説明】
Ａ 容器
α 柱角度
１ 口部
３ 胴部
７、９ 横リブ
８、１０ 円周面
１１ 円弧壁面
１２ 減圧吸収面
１４ 傾斜壁
１６ 平坦壁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plastic bottle, and more particularly to a plastic bottle for heating and filling a content liquid.
[0002]
[Prior art]
In order to heat and fill beverage liquid, plastic bottles having a reduced pressure absorption surface on the body are well known in the art, and hexahedral bottles having corners of the body as arcuate surfaces are commercially available.
[0003]
[Problems to be solved by the invention]
However, in the conventional hexahedral bottle, when the peripheral wall is wrapped with a shrink label, the peripheral surface of the label is divided into six parts, and the projected area of the label is smaller than the label area.
If the printed surface of the label is divided into two surfaces, the display content can be viewed with a single view of the printed surface when viewed from the direction of the radiation passing through the center of the printed surface. This makes it difficult to see the printed surface of the printer, and there is a problem that the container must be rotated to view the printed content.
[0004]
In order to make the design surface freely and make the printed content easy to see, it is possible to make the hexahedron closer to a circle and increase the number of face pieces, but if the number of faces is increased, the area of the vacuum absorbing surface decreases accordingly, Since the amount of vacuum absorption decreases, it cannot be used for hot-filled bottles at high temperatures, and hexagonal shapes have been considered the limit for polyhedral bottles.
[0005]
In consideration of the above problems, the present invention increases the number of surfaces of the bottle body and makes the vacuum absorption amount the same as that of the conventional hexahedron bottle in order to make the packaging film design and printed contents easier to see. An object of the present invention is to provide a heated filling bottle.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is a plastic bottle having a reduced pressure absorption surface, the bottle body has an octagonal cross section, an arc wall is formed at each corner, and an inclination is formed between the arc walls. A heat-fillable octahedron bottle having a vacuum absorbing surface composed of a wall and a flat wall, and the column angle formed by the inclined walls connected to both sides of the arc wall surface is in the range of 60 ° to 115 °. A configuration characterized by the above is adopted.
[0007]
In order to reinforce the reduced pressure absorbing surface, a configuration characterized in that a flat wall is provided with a concave rib or a convex rib having an arc cross section is adopted.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, a first embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, A is a bottle which is an octahedron bottle that is stretch blow molded using PET or other synthetic resin and can be heated and filled with the content liquid.
The bottle A is composed of a mouth part 1 and a shoulder part 2, an octagonal body part 3 and a bottom part 4. A screw 5 is screwed on the outer periphery of the mouth part 1, and a neck ring 6 is provided below the screw part 5. Projected.
[0009]
A lateral rib 7 is disposed at the boundary between the body portion 3 and the shoulder portion 2, and the lower side thereof is a narrow circumferential surface 8, and the boundary between the body portion 3 and the bottom portion 4 is A lateral rib 9 is provided, and an upper side thereof is a narrow circumferential surface 10.
The body portion 3 between the circumferential surface 8 and the circumferential surface 10 has an octagonal cross section, and each corner portion connects the circumferential surface 8 and the circumferential surface 10 and extends in the axial direction. A wall surface 11 is formed, and a reduced pressure absorption surface 12 is formed between all adjacent arc wall surfaces 11.
[0010]
As shown in FIG. 2, the decompression absorbing surface 12 is connected to the side edge 13 of the adjacent arc wall surface 11 and the upper and lower circumferential surfaces 8, 10, and the inclined wall 14 and the inner side edges 15 a, 15 a, It consists of a slightly curved flat wall 16 connected to b, c, d.
The flat wall 16 may be a flat wall surface as well as a slightly curved wall surface.
The flat wall 16 is provided with a rib 17 having a circular arc on the top and bottom and an arc-shaped cross section composed of two sides extending in the vertical direction.
[0011]
The bottom 4 includes a bottom peripheral wall 20, a bottom end wall 21, and a bottom wall 22 that is recessed upward from the bottom end wall 21 following the lateral rib 9.
A lateral rib 23 is provided in the middle of the bottom peripheral wall 20, and a plurality of known radial reinforcing ribs are provided on the bottom wall 22.
[0012]
Next, details of the structure of the circular arc wall surface 11 and the reduced pressure absorption surface 12 of the body portion 3 and the operational effects based thereon will be described with reference to FIG.
The circular arc wall surface 11 and the inclined walls 14a and 14b on both sides thereof form a column portion that reinforces the rigidity of the body portion 3, and the column angle α is formed by the angle formed by the two inclined walls 14a and 14b.
In the present embodiment, the column angle α is in the range of 60 ° to 115 °, preferably 75 ° or more.
[0013]
The bottle of this embodiment is molded using a resin weight of 32 g or less as a container for a capacity of 500 ml, the diameter of the bottle body or the same diameter D of the arc wall 11 as 68 mm, and the width of the arc wall 11. w is 5.35 mm, the distance W between the arc wall surfaces 11 is 21 mm, and the distance between the circumferential surface of the arc wall surface 11 and the flat wall 16 is 2.99 mm.
[0014]
The numerical values of the dimensions of each part of the bottle body are one example, and the numerical values can be changed according to changes in the capacity, design, and diameter of the bottle.
When the value is expressed in relation to the diameter D, W = 1 / 3.5 to 1 / 2.8D, H = 1/25 to 1 / 15D, and w = 1 to 6 mm. it can.
In the case of a conventional hexahedral body, the column angle α is in the range of 0 to 45 ° and the amount of vacuum absorption is about 30 cc. In the embodiment, the column angle α is increased to a range of 60 ° to 115 °. In particular, by setting the angle to 75 ° or more, it was possible to obtain the rigidity of the column portion and to secure the same amount of vacuum absorption as that of the hexahedral bottle.
[0015]
Further, by providing the ribs 17 on the flat wall 16, the flat wall 16 can be stabilized at the time of molding, so that a good molding surface can be obtained. The rigidity of the column is reinforced by the reinforcement of 14.
[0016]
Next, a test example is given and demonstrated about the effect of this invention.
[Test example]
Using PET as a raw material resin, a preform having a resin weight of 32 g was biaxially stretch blow molded to form an octahedral PET bottle having a total internal volume of 529 ml.
Each dimension is a test bottle with a diameter D = 68 mm, H = 2.99 mm, W = 21 mm, w = 5.35 mm, and column angles of 15 °, 40 °, 60 °, 75 °, 95 °. Five types were created.
[0017]
After each test bottle is given the same thermal conditions as the actual filling, water is filled to its full capacity, and the contents are reduced by a fixed amount with a syringe needle, etc., after the mouth is sealed and sealed. The limit capacity (reduced amount of vacuum) that the column part can maintain its shape was measured.
The results are as shown in Table 1, and are as shown in FIG.
[0018]
[Table 1]
Figure 0004201100
[0019]
From the test results, if the column angle α is set to 75 ° or more, the rigidity of the column is enhanced.
It can be seen that the reduced pressure absorption equivalent to the hexahedron can be obtained.
[0020]
It can be seen from the graph that when the column angle α is 115 °, the amount of vacuum absorption increases compared to when it is 75 °.
It can be seen from the test results that the angle of 60 ° is slightly inferior to that of 75 ° but can be adopted as a vacuum absorbing surface only by about 10% reduction.
[0021]
In the above test product, H, W, and w have specific dimensions, but with respect to the diameter D, H = 1/25 to 1 / 15D, W = 1 / 3.5 to 1 / 2.8D If so, it is possible to obtain a weight reduction absorption amount substantially equal to the test result.
[0022]
In the above-described embodiment, the bottle having the octahedron body has been described. However, the bottle body may be a seven-sided bottle or a nine-sided bottle.
Further, by applying to a hexahedral bottle, the amount of vacuum absorption can be increased as compared with the conventional one.
[0023]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists the following effect.
In a bottle having an octahedral body, by setting the column angle in the range of 60 ° to 115 °, a reduced pressure absorption amount equivalent to that of the hexahedral bottle was secured, and the rigidity of the column portion could be enhanced.
As a result, the projected area of the printed surface of the shrink label can be increased, and the printed surface of the label can be easily seen.
[Brief description of the drawings]
FIG. 1 is a front view of a bottle of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is an enlarged explanatory view of a reduced pressure absorption surface.
FIG. 4 is a graph of a reduced pressure absorption surface.
[Explanation of symbols]
A Container α Column angle 1 Mouth part 3 Body part 7, 9 Horizontal rib 8, 10 Circumferential surface 11 Arc wall surface 12 Decompression absorbing surface 14 Inclined wall 16 Flat wall

Claims (2)

ボトル胴部がその断面を八角形とし、各角部に円弧壁面を形成し、各円弧壁面の間に傾斜壁と平坦壁とからなる減圧吸収面を配設した加熱充填可能な八面体のボトルであって、
円弧壁面の両側に接続された傾斜壁のなす柱角度が、６０゜〜１１５゜の範囲としたことを特徴とする減圧吸収面を備えたブラスチックボトル。The bottle body has an octagonal cross section, arc wall surfaces are formed at each corner, and a heat-fillable octahedron bottle in which a vacuum absorbing surface composed of an inclined wall and a flat wall is disposed between the arc wall surfaces. Because
A plastic bottle having a reduced pressure absorbing surface, characterized in that the column angle formed by the inclined walls connected to both sides of the arc wall is in the range of 60 ° to 115 °. 平坦壁に断面弧状の凹リブまたは凸リブを設けたことを特徴とする請求項１記載のブラスチックボトル。2. The plastic bottle according to claim 1, wherein a concave rib or a convex rib having an arc cross section is provided on the flat wall.
JP2000016361A 2000-01-25 2000-01-25 Plastic bottle Expired - Fee Related JP4201100B2 (en)

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JP2000016361A JP4201100B2 (en) 2000-01-25 2000-01-25 Plastic bottle
US09/837,206 US20010030166A1 (en) 2000-01-25 2001-04-19 Plastic bottle

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JP2000016361A JP4201100B2 (en) 2000-01-25 2000-01-25 Plastic bottle

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