JPH0958646A - Heat-resistant and pressure-resistant self-supporting container - Google Patents
Heat-resistant and pressure-resistant self-supporting containerInfo
- Publication number
- JPH0958646A JPH0958646A JP20884395A JP20884395A JPH0958646A JP H0958646 A JPH0958646 A JP H0958646A JP 20884395 A JP20884395 A JP 20884395A JP 20884395 A JP20884395 A JP 20884395A JP H0958646 A JPH0958646 A JP H0958646A
- Authority
- JP
- Japan
- Prior art keywords
- container
- self
- resistant
- center
- valley line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- B65D1/0261—Bottom construction
- B65D1/0284—Bottom construction having a discontinuous contact surface, e.g. discrete feet
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば炭酸飲料や清涼
飲料水などを充填するのに好適な二軸延伸ブロ−成形さ
れた飽和ポリエステル樹脂製の自立容器に関し、さらに
詳細には、内容物の加熱殺菌時の耐熱及び耐圧性に優れ
た自立容器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-standing container made of a biaxially stretched blow-molded saturated polyester resin, which is suitable for filling carbonated drinks, soft drinks and the like. The present invention relates to a self-supporting container having excellent heat resistance and pressure resistance during heat sterilization.
【０００２】[0002]
【従来の技術】従来、耐熱、耐圧性容器としては、容器
本体の耐内圧性を高めるため底部を半球殻状に膨出成形
し、これに有底筒状に成形されたベ−スカップを装着し
て、容器に自立機能を付与したものが主流であった。し
かしながら、ベ−スカップの使用は、別途ベ−スカップ
を成形し装着固定を行わなければならないこと、容器の
重量が大きくなり、形状も大型化すること、加熱殺菌工
程で温水が容器底部に十分に達しないため内容物の加熱
殺菌をスム−ズに行うことができないこと、また、この
とき、ベ−スカップ内に水が溜まり、速やかに排水され
にくいこと、など様々な問題があった。2. Description of the Related Art Conventionally, as a heat-resistant and pressure-resistant container, in order to improve the internal pressure resistance of the container body, the bottom portion is bulged to form a hemispherical shell, and a base cup molded into a bottomed cylinder is attached to this. Then, the mainstream is a container with a self-supporting function. However, the use of the base cup requires that the base cup be separately formed and fixed, the weight of the container increases, the size of the container increases, and the hot water is sufficiently supplied to the bottom of the container in the heat sterilization process. Therefore, there are various problems such as that the contents cannot be heat-sterilized smoothly, and that water is accumulated in the base cup and it is difficult to quickly drain the contents.
【０００３】さらに、省資源や環境問題の観点から使用
済みの空容器を有効再利用することが望まれているが、
ベ−スカップを装着した容器では通常、容器本体とベ−
スカップや接着剤の材料が容器本体の材料と異なるた
め、再利用する場合にはこれらを分離しなければなら
ず、プロセス的にコスト高となるという問題も抱えてい
る。[0003] Further, from the viewpoint of resource saving and environmental issues, it is desired to effectively reuse used empty containers.
For containers equipped with a base cup, the container body and the base are usually
Since the material of the scoop and the adhesive is different from the material of the container body, they must be separated when they are reused, and there is also a problem that the process cost becomes high.
【０００４】このような問題から、ベ−スカップを必要
としない耐熱、耐圧性容器が望まれていた。ベ−スカッ
プを必要としない耐圧性容器としては、いくつかの提案
がなされており、一般的には底部中心部の周りに複数の
脚部を放射状に膨出し、これらの脚部の間に谷線部を形
成した構造か、あるいはシャンペンタイプの構造かのい
ずれかであり、例えば、特公昭４８−５７０８号公報、
特公昭５９−４０６９３号公報、特公昭６１−９１７０
号公報、特開昭６３−２０２４２４号公報、及び特開平
３−４３３４２号公報に記載されている。Due to these problems, a heat-resistant and pressure-resistant container that does not require a base cup has been desired. Several proposals have been made for pressure-resistant containers that do not require a base cup, and generally, a plurality of legs are radially bulged around the center of the bottom, and valleys are formed between these legs. It has either a structure in which a line portion is formed or a champagne type structure, and is disclosed in, for example, Japanese Patent Publication No. 48-5708.
Japanese Patent Publication No. 59-40693, Japanese Patent Publication No. 6-9170
JP-A-63-202424 and JP-A-3-43342.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、これら
各号に記載された容器は、耐圧性容器としては満足する
性能を得ることができるものの、加熱殺菌工程が実施さ
れる耐熱及び耐圧性容器として使用した場合には十分な
性能を得ることができない。すなわち、前記各号に記載
された容器は、底部中心部および該中心部周辺に未延伸
領域あるいは低延伸領域が存在しているため、加熱殺菌
時に内容物の温度が５０℃〜７０℃程度に上昇すると、
内圧が増大すること、また容器材料自体もクリ−プ変形
を起こしやすくなることにより、底部中心部および該中
心部周辺の低延伸領域及び谷線部の低延伸領域とその周
辺の高延伸領域がクリ−プ変形を起こして突出し、容器
は自立安定性を失うことになる。However, although the containers described in these items can obtain satisfactory performance as pressure resistant containers, they are used as heat resistant and pressure resistant containers in which a heat sterilization process is carried out. In that case, sufficient performance cannot be obtained. That is, in the containers described in the above items, since the unstretched region or the low stretched region exists in the center of the bottom and the periphery of the center, the temperature of the contents during heat sterilization is about 50 ° C to 70 ° C. When rising,
Since the internal pressure increases and the container material itself tends to undergo creep deformation, the low-stretched region in the center of the bottom and the periphery of the center and the low-stretched region of the valley line and the high-stretched region in the periphery thereof are formed. Creep deformation causes protrusion and the container loses self-supporting stability.
【０００６】この問題を解決する方法として、例えば、
特開平５−８５５３５号公報に記載された容器を使用す
ることが考えられる。この容器は、底部中心部を結晶化
し、中心部周辺を十分に延伸した容器であるため、加熱
殺菌時に内圧が増大した場合の底部のクリ−プ変形をあ
る程度抑制することができる。しかしながら、この容器
の場合においても、脚部と脚部との間に形成された谷線
部を十分に延伸することは困難で該部分に低延伸領域が
残るため、加熱殺菌時に該部分がクリ−プ変形を起こし
底部が突出して自立安定性を失うか、または、自立安定
性は保持されても、入り味線が大幅に降下し、実用性を
失うという問題が生じる。As a method for solving this problem, for example,
It is conceivable to use the container described in JP-A-5-85535. Since this container is a container in which the center of the bottom is crystallized and the periphery of the center is sufficiently stretched, creep deformation of the bottom when the internal pressure increases during heat sterilization can be suppressed to some extent. However, even in the case of this container, it is difficult to sufficiently stretch the valley line portion formed between the leg portions and a low stretched region remains in the portion, so that the portion is not cleared during heat sterilization. -There is a problem in that the bottom portion is projected to lose the self-sustaining stability due to the deformation of the base, or the self-sustaining stability is maintained, but the flavor line is greatly lowered to lose the practicality.
【０００７】本発明の研究者等は鋭意研究の結果、底部
中心部の周りに複数の脚部を放射状に膨出し、これらの
脚部と脚部との間に谷線部を形成した底部構造の場合、
内圧による応力が特に底部中心部の周辺部と谷線部に集
中することを見い出し、さらに実際の加熱殺菌時の底部
突出においては、谷線部とその周辺のクリ−プ変形が特
に大きいことを発見した。As a result of earnest research by the researchers of the present invention, a bottom structure in which a plurality of legs are radially bulged around the center of the bottom and a valley line portion is formed between the legs. in the case of,
It was found that the stress due to the internal pressure was concentrated especially on the peripheral part of the bottom center part and the valley line part, and furthermore, in the bottom protrusion during the actual heat sterilization, the creep deformation of the valley line part and its periphery was particularly large. discovered.
【０００８】本発明はこのような問題点を解決したもの
であり、加熱殺菌時に内圧の増大によりクリ−プ変形を
起こしやすい、主に底部中心部の低延伸部領域、底部中
心部の周辺部の低延伸部領域、及び谷線部の低延伸部領
域と高延伸部領域等を結晶化することにより、容器の加
熱殺菌時に底部が突出して自立安定性を失うことがな
く、さらには耐薬品性にも優れた、耐熱及び耐圧性自立
容器を提供するものである。The present invention has solved the above problems, and is mainly liable to cause creep deformation due to an increase in internal pressure during heat sterilization, mainly in a low-stretched region in the center of the bottom and in the peripheral region of the center of the bottom. By crystallizing the low-stretched part region, and the low-stretched part region and the high-stretched part region of the valley line part, the bottom part does not lose its self-sustaining stability when the container is heat-sterilized, and further chemical resistance It is intended to provide a heat-resistant and pressure-resistant self-supporting container having excellent properties.
【０００９】[0009]
【課題を解決するための手段】すなわち本発明は、口頸
部、肩部、胴部及び底部からなる二軸延伸ブロー成形さ
れた飽和ポリエステル樹脂製中空容器において、前記底
部は、底部中心部の周りに複数の脚部を放射状に膨出
し、これらの脚部と脚部との間に谷線部を形成した自立
可能な構造を有し、下記の（Ａ）〜（Ｅ）から選ばれた
少なくとも一つの部分が結晶化されている耐熱及び耐圧
性自立容器である。 （Ａ）底部中心部 （Ｂ）底部中心部の周辺部 （Ｃ）谷線部 （Ｄ）底部中心部の周辺部の縁より接地部にいたる部分 （Ｅ）谷部Means for Solving the Problems That is, the present invention is a biaxially stretch blow-molded saturated polyester resin hollow container comprising a mouth / neck portion, a shoulder portion, a body portion and a bottom portion. It has a self-sustainable structure in which a plurality of leg portions are radially bulged around and a valley line portion is formed between these leg portions and are selected from the following (A) to (E). A heat-resistant and pressure-resistant freestanding container in which at least one part is crystallized. (A) Bottom center part (B) Bottom center part peripheral part (C) Valley line part (D) Bottom part peripheral part edge to ground contact part (E) Valley part
【００１０】以下、本発明を詳細に説明する。本発明の
中空容器に用られる飽和ポリエステル樹脂は、主たる繰
り返し単位がエチレンテレフタレートである熱可塑性ポ
リエステル樹脂が好ましく、該熱可塑性ポリエステル樹
脂とは、ポリエチレンテレフタレートのホモポリマーを
主たる成分とするものが好ましい。Hereinafter, the present invention will be described in detail. The saturated polyester resin used in the hollow container of the present invention is preferably a thermoplastic polyester resin whose main repeating unit is ethylene terephthalate, and the thermoplastic polyester resin is preferably one containing a homopolymer of polyethylene terephthalate as a main component.
【００１１】この熱可塑性ポリエステル樹脂としては、
テレフタル酸成分の一部を例えば、イソフタル酸、ナフ
タリンジカルボン酸、ジフェニルジカルボン酸、ジフェ
ノキシエタンジカルボン酸、ジフェニルエーテルジカル
ボン酸、ジフェニルスルホンジカルボン酸等の芳香族ジ
カルボン酸；ヘキサヒドロテレフタル酸、ヘキサヒドロ
イソフタル酸等の脂環族ジカルボン酸；アジピン酸、セ
バチン酸、アゼライン酸等の脂肪族ジカルボン酸；Ｐ−
β−ヒドロキシエトキシ安息香酸、ε−オキシカプロン
酸等のオキシ酸等の他の二官能性カルボン酸の１種以上
を置換して共重合したものが使用できる。As this thermoplastic polyester resin,
Some of the terephthalic acid components are aromatic dicarboxylic acids such as isophthalic acid, naphthalene dicarboxylic acid, diphenyl dicarboxylic acid, diphenoxyethane dicarboxylic acid, diphenyl ether dicarboxylic acid, diphenyl sulfone dicarboxylic acid; hexahydroterephthalic acid, hexahydroisophthalic acid Alicyclic dicarboxylic acids such as; adipic acid, sebacic acid, azelaic acid and other aliphatic dicarboxylic acids; P-
A copolymer obtained by substituting at least one other difunctional carboxylic acid such as oxyacid such as β-hydroxyethoxybenzoic acid and ε-oxycaproic acid can be used.
【００１２】また、熱可塑性ポリエステル樹脂は、エチ
レングリコール成分の一部を例えば、トリメチレングリ
コール、テトラメチレングリコール、ヘキサメチレング
リコール、デカメチレングリコール、ネオペンチレング
リコール、ジエチレングリコール、１，１−シクロヘキ
サンジメチロール、１，４−シクロヘキサンジメチロー
ル、２，２（４’−β−ヒドロキシエトキシフェニル）
スルホン酸等の他のグリコール及びこれらの機能的誘導
体の多官能化合物の１種以上で置換して共重合した共重
合体でもよい。In the thermoplastic polyester resin, a part of the ethylene glycol component is, for example, trimethylene glycol, tetramethylene glycol, hexamethylene glycol, decamethylene glycol, neopentylene glycol, diethylene glycol, 1,1-cyclohexanedimethylol. , 1,4-cyclohexanedimethylol, 2,2 (4'-β-hydroxyethoxyphenyl)
It may be a copolymer obtained by substituting one or more polyfunctional compounds of other glycols such as sulfonic acid and functional derivatives thereof for copolymerization.
【００１３】また、本発明の容器に使用する熱可塑性ポ
リエステル樹脂は、固有粘度が０．７〜１．０が好まし
く、特に好ましくは０．７５〜０．９０である。The intrinsic viscosity of the thermoplastic polyester resin used in the container of the present invention is preferably 0.7 to 1.0, particularly preferably 0.75 to 0.90.
【００１４】更に、本発明に使用する熱可塑性ポリエス
テル樹脂には、着色剤、熱劣化防止剤、酸化防止剤、紫
外線吸収剤、帯電防止剤、抗菌剤、滑剤等の添加剤を適
宜用いることができる。Further, for the thermoplastic polyester resin used in the present invention, additives such as a colorant, a heat deterioration preventing agent, an antioxidant, an ultraviolet absorber, an antistatic agent, an antibacterial agent and a lubricant may be appropriately used. it can.
【００１５】本発明において、容器底部の特定部分を結
晶化させる方法としては、（Ａ）ブロー成形中に金型内
で加熱し結晶化する方法、（Ｂ）ブロー成形した容器を
熱源として赤外線ヒーター、赤外線ランプ、熱風、石英
管ヒーター、高周波加熱装置などを用い、熱源と容器底
部との間にスリットを有する遮蔽板を設置して、この遮
蔽板に設けられたスリットを通して容器底部の所望の部
分を加熱し熱結晶化する方法がある。この遮蔽板の表面
形状は、容器の底面とほぼ同様な表面形状を有すること
が好ましい。熱源の熱は、このスリットを通って容器底
部に達し、熱により所望の部分を結晶化させることがで
きる。また、遮蔽板には、冷却水又は温水を通すことに
より、その表面温度を容器材料のガラス転移点温度以下
の温度に保ち、容器底部の非加熱部分の温度上昇を抑制
し、高温に加熱されるのを防ぐことができる。また、遮
蔽板を必要に応じて２種類以上使用し、数段階に分けて
結晶化を行うこともできる。In the present invention, as a method of crystallizing a specific portion of the bottom of the container, (A) a method of crystallizing by heating in a mold during blow molding, and (B) an infrared heater using a blow molded container as a heat source. Using infrared lamps, hot air, quartz tube heaters, high-frequency heating devices, etc., install a shield plate having a slit between the heat source and the bottom of the container, and through the slit provided in this shield plate, the desired part of the bottom of the container There is a method of heating and heat crystallization. The surface shape of the shielding plate preferably has a surface shape substantially similar to the bottom surface of the container. The heat of the heat source reaches the bottom of the container through this slit, and the desired portion can be crystallized by the heat. In addition, by passing cooling water or warm water through the shielding plate, the surface temperature of the shielding plate is maintained at a temperature not higher than the glass transition temperature of the container material, the temperature rise of the non-heated part of the container bottom is suppressed, and it is heated to a high temperature. Can be prevented. Further, it is possible to use two or more kinds of shield plates as necessary and perform crystallization in several stages.
【００１６】本発明において、（Ａ）〜（Ｅ）の部分
は、容器底部の部分である。（Ａ）底部中心部とは、例
えば、図１２の３で示される部分であり、未延伸、低延
伸部領域となっている。（Ｂ）底部中心部の周辺部は図
１２の４で示される部分であり、低延伸部領域となって
いる。（Ｃ）谷線部は、脚部間に形成された帯状部分で
あり、例えば、図１２の６で示される部分であり、底部
の中心部周辺部に近い部分は低延伸部となるが、徐々に
胴部側に近づくにつれて延伸配向度が高くなり高延伸領
域となっている。（Ｄ）底部中心部の周辺部の縁より接
地部にいたる部分とは、例えば、図１２の７で示される
部分であり、底部中心部の周辺部側は低延伸部領域であ
るが接地部に近づくにつれて高延伸領域となる。（Ｅ）
谷部とは、脚部の接地部及び脚部の外側面部及び谷線部
にはさまれた領域であり、例えば、図１２の９で示され
る部分であり、低延伸部領域と高延伸部領域が存在す
る。本発明において、（Ａ）〜（Ｅ）の各部分の結晶化
は、少なくとも各部分の一部分以上が結晶化されていれ
ばよい。In the present invention, the parts (A) to (E) are the bottom part of the container. The (A) center portion of the bottom portion is, for example, a portion indicated by 3 in FIG. 12 and is an unstretched or low stretched portion region. (B) The peripheral portion of the central portion of the bottom portion is a portion indicated by 4 in FIG. 12, which is a low stretched portion region. (C) The valley line portion is a strip-shaped portion formed between the leg portions, and is, for example, a portion indicated by 6 in FIG. 12, and a portion near the central portion peripheral portion of the bottom portion is a low extension portion, The degree of stretch orientation becomes higher as it gradually approaches the body side, and it is a high stretch region. (D) The portion extending from the peripheral edge of the center of the bottom portion to the ground contact portion is, for example, the portion indicated by 7 in FIG. 12, and the peripheral portion side of the center of the bottom portion is the low extension portion area, but the ground contact portion. As it approaches, the stretched region becomes high. (E)
The valley portion is a region sandwiched between the ground contact portion of the leg portion, the outer side surface portion of the leg portion, and the valley line portion, and is, for example, a portion indicated by 9 in FIG. 12, and is a low stretch portion region and a high stretch portion. Area exists. In the present invention, each part (A) to (E) may be crystallized if at least a part of each part is crystallized.
【００１７】本発明の容器は、容器底部の（Ａ）〜
（Ｅ）の中から選ばれた少なくとも１つの部分が結晶化
されたものであり、好ましくは、（Ａ）、（Ｂ）及び
（Ｃ）を含む組み合わせであり、特に好ましい構成は、
下記の（イ）〜（ホ）の組み合わせである。 （イ）（Ａ）、（Ｂ）及び（Ｃ）の組み合わせ （ロ）（Ａ）、（Ｂ）、（Ｃ）及び（Ｄ）の組み合わせ （ハ）（Ａ）、（Ｂ）、（Ｃ）、（Ｄ）及び（Ｅ）の組
み合わせ （ニ）（Ａ）、（Ｂ）、（Ｃ）及び（Ｅ）の組み合わせ 上記容器底部の結晶化により、加熱殺菌時に特にクリー
プ変形を抑制することができる。The container of the present invention comprises a container bottom (A)-
At least one portion selected from (E) is crystallized, preferably a combination containing (A), (B) and (C), and a particularly preferable constitution is
It is a combination of the following (a) to (e). (B) Combination of (A), (B) and (C) (b) Combination of (A), (B), (C) and (D) (C) (A), (B), (C) , (D) and (E) in combination (d) (A), (B), (C) and (E) in combination By crystallizing the bottom of the container, it is possible to suppress creep deformation particularly during heat sterilization. .
【００１８】本発明の容器底部の結晶化された部分は、
ポリエチレンテレフタレ−トの場合には密度が、1.350g
/cm3〜1.385g/cm3の範囲であり、特に好ましい密度は、
1.350g/cm3〜1.380g/cm3である。結晶化された部分の密
度が1.350g/cm3未満であると、容器の加熱殺菌時に、内
圧により底部がクリ−プ変形して突出し易くなり、自立
安定性を失い商品価値を失うことがある。また、1.385g
/cm3を越えると結晶化部分の衝撃強度が低下し、容器に
落下衝撃を与えたときに底部が破壊することがある。The crystallized portion of the bottom of the container of the present invention is
In the case of polyethylene terephthalate, the density is 1.350g
/ cm 3 ~ 1.385g / cm 3 is in the range, particularly preferred density,
It is 1.350 g / cm 3 to 1.380 g / cm 3 . If the density of the crystallized part is less than 1.350 g / cm 3 , the bottom part of the container may creep and deform due to internal pressure during heat sterilization of the container, and the product may lose its self-standing stability and lose its commercial value. . Also, 1.385g
If it exceeds / cm 3 , the impact strength of the crystallized part will decrease and the bottom part may break when the container is given a drop impact.
【００１９】また、本発明において結晶化された容器底
部の中心部周辺および谷線部はクレ−ズの発生し易い部
分の一つである。クレ−ズは充填工場のコンベア−ライ
ンにおける潤滑剤などによってさらに促進され、ストレ
スクラックを引き起こすが、この部分を結晶化すること
により材料の耐薬品性を向上させることができるため、
ストレスクラックの発生を抑制することができる。Further, in the present invention, the periphery of the central portion of the crystallized container bottom portion and the valley line portion are one of the portions where craze is likely to occur. Claze is further promoted by a lubricant or the like in the conveyor line of the filling factory, causing stress cracks, but by crystallizing this part, it is possible to improve the chemical resistance of the material,
Generation of stress cracks can be suppressed.
【００２０】本発明の容器は、炭酸飲料や清涼飲料水な
どを充填するのに好適な自立容器であるが、本発明の容
器は、その性能をさらに高めるために、さらに、少なく
とも容器口頸部、サポートリング及びサポートリング下
部から選ばれた一つの部分が結晶化又は応力緩和された
ものであってもよい。The container of the present invention is a self-supporting container suitable for filling carbonated beverages, soft drinks, etc., but the container of the present invention further has at least a container mouth neck portion in order to further enhance its performance. One part selected from the support ring and the lower part of the support ring may be crystallized or stress-relaxed.
【００２１】[0021]
【実施例】以下、実施例により本発明を詳細に説明す
る。The present invention will be described in detail below with reference to examples.
【００２２】実施例１ ポリエチレンテレフタレート（ＩＶ＝０．８５）を射出
成形してプリフォームを得た。この有底プリフォームを
再加熱した後、二軸延伸ブロー成形を行い、自立容器を
得た。この自立容器は、図２及び図３に示すように、５
個の脚部５が底部中心部３の周りに放射状に等間隔に膨
出すると共に、この脚部５の間に谷線部６を形成した自
立型の底部構造を有していた。Example 1 Polyethylene terephthalate (IV = 0.85) was injection molded to obtain a preform. After reheating this bottomed preform, biaxial stretch blow molding was performed to obtain a self-supporting container. This self-supporting container is, as shown in FIGS.
The individual leg portions 5 bulged around the bottom central portion 3 radially at equal intervals, and the valley line portions 6 were formed between the leg portions 5 to have a self-supporting bottom structure.
【００２３】次に、この自立容器を図４（図において、
斜線は開口部１１ａを示す）に示すような遮蔽板１０ａ
の上方に勘合、設置し、遮蔽板１０ａの下方から赤外線
ヒ−タ−により自立容器の底部を加熱したところ、底部
中心部３、底部中心部の周辺部４、谷線部６が結晶化さ
れた容器底部２ａを有する容器を得た（図５に示す）。
この容器の全高は３１０ｍｍ、容量は１．５リットルで
あった。図１に得られた自立容器の正面図を示す。Next, the self-supporting container is shown in FIG.
The hatched portion indicates the opening 11a) and the shielding plate 10a as shown in FIG.
When the bottom part of the self-supporting container was heated from below the shielding plate 10a by an infrared heater, the bottom center part 3, the bottom center part 4, and the valley line part 6 were crystallized. A container having a container bottom 2a was obtained (shown in FIG. 5).
The total height of this container was 310 mm and the volume was 1.5 liters. The front view of the obtained self-supporting container is shown in FIG.
【００２４】実施例２ 実施例１と同様にして図６に示すような遮蔽板１０ｂを
使用し、自立容器の底部を加熱し、底部中心部３、底部
中心部の周辺部４、谷線部６、及び底部中心部の周辺部
の縁より接地部に至る部分７が結晶化された容器底部２
ｂを得た（図７に示す）。Example 2 In the same manner as in Example 1, a shield plate 10b as shown in FIG. 6 was used to heat the bottom of the self-supporting container, and the bottom center part 3, the bottom center part peripheral part 4, the valley line part were used. 6, and a container bottom 2 in which a portion 7 from the peripheral edge of the center of the bottom to the grounding portion is crystallized
b was obtained (shown in FIG. 7).
【００２５】実施例３ 実施例１と同様にして図８に示すような遮蔽板１０ｃを
使用し、自立容器の底部を加熱し、底部中心部３、底部
中心部の周辺部４、谷線部６、底部中心部の周辺部の縁
より接地部に至る部分７及び谷部の一部９が結晶化され
た容器底部２ｃ（図９に示す）を有する容器を得た。Example 3 In the same manner as in Example 1, a shield plate 10c as shown in FIG. 8 was used to heat the bottom of the self-supporting container, and the center 3 of the bottom, the peripheral 4 of the center of the bottom, and the valley line portion were used. 6, a container 7 having a container bottom 2c (shown in FIG. 9) in which a part 7 extending from the peripheral edge of the center of the bottom to the ground contact part and a part 9 of the valley was crystallized was obtained.
【００２６】実施例４ 実施例１と同様にして図１０に示すような遮蔽板１０ｄ
を使用し、容器の底部を加熱し、底部中心部３、底部中
心部の周辺部４、谷線部６、及び谷部の一部９が結晶化
された容器底部２ｄ（図１１に示す）を有する自立容器
を得た。Embodiment 4 Similar to Embodiment 1, a shielding plate 10d as shown in FIG. 10 is used.
By heating the bottom of the container to crystallize the bottom center part 3, the bottom center peripheral part 4, the valley line part 6, and part of the valley part 2d (shown in FIG. 11). A self-supporting container having
【００２７】比較例１ 実施例１において、容器底部の加熱、結晶化を行わなか
った。得られた中空容器は、容器の底部が全く結晶化し
ていないものであった。Comparative Example 1 In Example 1, the bottom of the container was not heated and crystallized. The obtained hollow container had no bottom crystallized at all.
【００２８】（評価方法及び結果）実施例及び比較例に
て得られた容器を、各１２本ずつ作成し、５℃におい
て、２．５ガスボリュウームの炭酸水を入り味線４３ｍ
ｍまで充填して、キャッピングした後、７０℃の温水シ
ャワーを３０分間かけ、その後２０℃の水で１０分間シ
ャワーをかけ冷却を行い、評価を行った。 １）自立安定性の評価 底部の中心部が脚部の接地面より下に突出していないも
のを○、突出しているものを×とした。 ２）入り味線降下量の評価 評価前後の中空容器の口頸部の先端から、内容物の液面
までの高さの差を測定した。降下量が２０ｍｍ以下を良
好とする。 ３）全高変形量 評価前後の中空容器の高さを測定し差を求めた。(Evaluation Method and Results) Twelve containers obtained in each of the examples and comparative examples were prepared, and 2.5 m of gas volume carbonated water was added at 5 ° C.
After filling up to m and capping, a hot water shower at 70 ° C. was applied for 30 minutes, and then showering was performed with water at 20 ° C. for 10 minutes to cool and evaluate. 1) Evaluation of self-sustaining stability When the center part of the bottom part did not project below the ground contact surface of the leg part, it was evaluated as ◯, and when it protruded it was evaluated as x. 2) Evaluation of amount of drop in taste line Before and after the evaluation, the difference in height from the tip of the mouth and neck of the hollow container to the liquid surface of the content was measured. A descending amount of 20 mm or less is regarded as good. 3) Total deformation amount The height of the hollow container before and after the evaluation was measured to obtain the difference.
【００２９】[0029]
【表１】 [Table 1]
【００３０】上記の実施例１〜４及び比較例１の試験結
果から、本発明の自立容器は、加熱殺菌時のクリープ変
形による底部突出を制御して、入味線降下を防ぎ、自立
安定性を保持することに優れていることが理解される。
尚、本発明における容器底部の構造は、本発明の実施例
の構造に限定されるものではなく、本発明の実施例と類
似の他の構造においても同様の効果が得られる。From the test results of Examples 1 to 4 and Comparative Example 1 described above, the self-standing container of the present invention controls the bottom protrusion due to the creep deformation during heat sterilization to prevent the drop of the flavor line and the self-standing stability. It is understood that it is excellent to hold.
The structure of the container bottom in the present invention is not limited to the structure of the embodiment of the present invention, and similar effects can be obtained in other structures similar to those of the embodiment of the present invention.
【００３１】[0031]
【発明の効果】以上の通り、本発明の自立容器は、容器
内容物の加熱殺菌時に底部突出を抑制して自立安定性を
保持し、耐薬品性にも優れた耐熱、耐圧性自立容器であ
る。また、本発明による容器はベースカップを必要とし
ないため、加熱殺菌処理時の熱水が容器底部に十分に達
し、内容物の加熱殺菌をスムーズに行うことができ、さ
らには、使用済み容器の再利用も容易となる。As described above, the self-supporting container of the present invention is a heat-resistant and pressure-resistant self-supporting container which suppresses the bottom projection during heat sterilization of the container contents to maintain self-sustaining stability and has excellent chemical resistance. is there. Further, since the container according to the present invention does not require a base cup, hot water at the time of heat sterilization reaches the bottom of the container sufficiently, and heat sterilization of the contents can be smoothly performed. Reuse becomes easy.
【図１】本発明の自立容器の正面図である。FIG. 1 is a front view of a self-standing container of the present invention.
【図２】本発明の自立容器の底部の結晶化を行う前の底
面図である。FIG. 2 is a bottom view before crystallization of the bottom of the self-supporting container of the present invention.
【図３】本発明の自立容器の底部の断面図である。FIG. 3 is a sectional view of the bottom of the self-standing container of the present invention.
【図４】実施例１で使用する遮蔽板の平面図である。FIG. 4 is a plan view of a shielding plate used in Example 1.
【図５】実施例１の自立容器の底面図である。5 is a bottom view of the self-supporting container of Example 1. FIG.
【図６】実施例２で使用する遮蔽板の平面図である。FIG. 6 is a plan view of a shielding plate used in Example 2.
【図７】実施例２の自立容器の底面図である。FIG. 7 is a bottom view of the self-supporting container according to the second embodiment.
【図８】実施例３で使用する遮蔽板の平面図である。FIG. 8 is a plan view of a shielding plate used in Example 3.
【図９】実施例３の自立容器の底面図である。FIG. 9 is a bottom view of the self-supporting container of Example 3.
【図１０】実施例４で使用する遮蔽板の平面図である。FIG. 10 is a plan view of a shielding plate used in Example 4.
【図１１】実施例４の自立容器の底面図である。FIG. 11 is a bottom view of the self-supporting container of Example 4.
【図１２】本発明の容器底部の各部分を示す図である。FIG. 12 is a view showing each part of the container bottom of the present invention.
１ 自立容器 ２ 底部 ２ａ、２ｂ、２ｃ、２ｄ、 部分的に結晶化された容器
底部 ３ （Ａ）底部中心部 ４ （Ｂ）底部中心部の周辺部 ５ 脚部 ５Ａ 接地部 ６ （Ｃ）谷線部 ７ （Ｄ）底部中心部の周辺部の縁より接地部にいたる
部分 ８ 脚部の外側面部 ９ （Ｅ）谷部 １０ａ、１０ｂ、１０ｃ、１０ｄ 遮蔽板 １１ａ、１１ｂ、１１ｃ、１１ｄ スリット １１ 肩部 １２ 胴部 １３ 口頸部1 Self-supporting container 2 Bottom parts 2a, 2b, 2c, 2d, partially crystallized container bottom part 3 (A) Bottom center part 4 (B) Bottom center part peripheral part 5 Legs 5A Ground part 6 (C) Valley Line portion 7 (D) Bottom portion from the peripheral edge of the central portion to the grounding portion 8 Outside surface portion of the leg portion 9 (E) Valley portion 10a, 10b, 10c, 10d Shielding plate 11a, 11b, 11c, 11d Slit 11 Shoulder 12 Body 13 Mouth and neck
Claims (1)
軸延伸ブロー成形された飽和ポリエステル樹脂製中空容
器において、前記底部は、底部中心部の周りに複数の脚
部を放射状に膨出し、これらの脚部と脚部との間に谷線
部を形成した自立可能な構造を有し、下記の（Ａ）〜
（Ｅ）から選ばれた少なくとも一つの部分が結晶化され
ていることを特徴とする耐熱及び耐圧性自立容器。 （Ａ）底部中心部 （Ｂ）底部中心部の周辺部 （Ｃ）谷線部 （Ｄ）底部中心部の周辺部の縁より接地部にいたる部分 （Ｅ）谷部1. A biaxially stretch blow-molded hollow container made of saturated polyester resin comprising a mouth, a neck, a shoulder, a body and a bottom, wherein the bottom has a plurality of legs radially around a center of the bottom. It has a structure in which it bulges out and forms a valley line portion between these leg portions so that it can stand on its own.
At least one portion selected from (E) is crystallized, which is a heat-resistant and pressure-resistant freestanding container. (A) Bottom center part (B) Bottom center part peripheral part (C) Valley line part (D) Bottom part peripheral part edge to ground contact part (E) Valley part
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20884395A JPH0958646A (en) | 1995-08-16 | 1995-08-16 | Heat-resistant and pressure-resistant self-supporting container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20884395A JPH0958646A (en) | 1995-08-16 | 1995-08-16 | Heat-resistant and pressure-resistant self-supporting container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0958646A true JPH0958646A (en) | 1997-03-04 |
Family
ID=16563027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20884395A Pending JPH0958646A (en) | 1995-08-16 | 1995-08-16 | Heat-resistant and pressure-resistant self-supporting container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0958646A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003261127A (en) * | 2002-03-04 | 2003-09-16 | Asahi Soft Drinks Co Ltd | Resin-made container and beverage in the container |
| WO2012029665A1 (en) * | 2010-09-01 | 2012-03-08 | 大日本印刷株式会社 | Plastic bottle |
| JP2012051623A (en) * | 2010-09-01 | 2012-03-15 | Dainippon Printing Co Ltd | Plastic bottle |
| JP2012140154A (en) * | 2010-12-28 | 2012-07-26 | Dainippon Printing Co Ltd | Plastic bottle |
| JP2022010902A (en) * | 2020-06-29 | 2022-01-17 | 株式会社吉野工業所 | Pressure resistant bottle |
-
1995
- 1995-08-16 JP JP20884395A patent/JPH0958646A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003261127A (en) * | 2002-03-04 | 2003-09-16 | Asahi Soft Drinks Co Ltd | Resin-made container and beverage in the container |
| WO2012029665A1 (en) * | 2010-09-01 | 2012-03-08 | 大日本印刷株式会社 | Plastic bottle |
| JP2012051623A (en) * | 2010-09-01 | 2012-03-15 | Dainippon Printing Co Ltd | Plastic bottle |
| CN103118950A (en) * | 2010-09-01 | 2013-05-22 | 大日本印刷株式会社 | Plastic bottle |
| JP2012140154A (en) * | 2010-12-28 | 2012-07-26 | Dainippon Printing Co Ltd | Plastic bottle |
| JP2022010902A (en) * | 2020-06-29 | 2022-01-17 | 株式会社吉野工業所 | Pressure resistant bottle |
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