JPH09315419A - Self-standing container - Google Patents
Self-standing containerInfo
- Publication number
- JPH09315419A JPH09315419A JP16653596A JP16653596A JPH09315419A JP H09315419 A JPH09315419 A JP H09315419A JP 16653596 A JP16653596 A JP 16653596A JP 16653596 A JP16653596 A JP 16653596A JP H09315419 A JPH09315419 A JP H09315419A
- Authority
- JP
- Japan
- Prior art keywords
- container
- self
- leg
- center
- angle
- 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.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 230000002123 temporal effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 description 6
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- 239000002585 base Substances 0.000 description 4
- 238000000071 blow moulding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 235000013361 beverage Nutrition 0.000 description 2
- 235000015203 fruit juice Nutrition 0.000 description 2
- 235000014655 lactic acid Nutrition 0.000 description 2
- 239000004310 lactic acid Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はベースカップを使用
しない延伸ブロー形成により成形した自立容器に関す
る。さらに詳しくはガス含有小容量自立容器や果汁、乳
酸等の入ったガス含有自立容器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-standing container formed by stretch blow molding without using a base cup. More specifically, it relates to a gas-containing small capacity self-supporting container and a gas-containing self-supporting container containing fruit juice, lactic acid and the like.
【０００２】[0002]
【従来の技術】従来ベースカップを使用しない延伸成形
された自立型容器として、特公昭４８−５７０８号公
報、特公昭６１−９１７０号公報、特開平１−２６７１
４６号公報、特公昭５９−４０６９３号公報等に記載さ
れた容器が知られている。これ等の容器はいずれも容器
の底部に脚部を形成して自立出来るようにしたものであ
る。これ等従来の容器の問題点はこれ等の容器の底部を
分割する谷底面と、谷底面を挾む両側壁部即ち脚部側壁
との境界線で区画した放射状に周縁に向って広がる谷
部、を有する底部は半球殻の一部をなす谷底面により耐
内圧性を向上させる効果を期待したものである。ところ
がこのような自立容器には経時変化が生ずることがわか
った。自立容器にガス含有内容物を収納すると時間の経
過とともに底面が変形し、下方に突出して来る傾向が大
きく、底部中央部分が膨出して接地し、自立安定性がな
くなる場合もある。特に、内容量が１０００ｍｌ以下の
小容量自立容器においてこの傾向が顕著に現れる。小容
量容器には脚部の賦形性悪く、耐熱安定性と、耐ＥＳＣ
性が悪くクレージングが発生する問題もある。2. Description of the Related Art Conventionally, as a self-supporting container which is stretch-molded without using a base cup, Japanese Patent Publication Nos. 48-5708, 61-9170 and 61-2671 are available.
The containers described in Japanese Patent Publication No. 46 and Japanese Patent Publication No. 59-40693 are known. Each of these containers has legs formed at the bottom of the container so that it can stand by itself. The problem with these conventional containers is that the valley bottoms that divide the bottoms of these containers and the valleys that spread radially toward the periphery are defined by the boundaries between the side walls that sandwich the valley bottoms, that is, the side walls of the legs. The bottom part having, is expected to have the effect of improving the internal pressure resistance by the valley bottom forming a part of the hemispherical shell. However, it has been found that such a self-supporting container changes with time. When the gas-containing contents are stored in the self-supporting container, the bottom surface is likely to be deformed and protrude downwards with the passage of time, and the center part of the bottom part may bulge to come into contact with the ground and lose self-supporting stability. In particular, this tendency remarkably appears in a small capacity self-supporting container having an internal capacity of 1000 ml or less. The small-capacity container has poor leg shapeability, heat resistance stability, and ESC resistance.
There is also a problem that the property is poor and crazing occurs.
【０００３】[0003]
【発明が解決しようとする課題】本発明はガスを含有す
る内容物を収納しても経時的に変形しない底面を有する
自立容器を提供するものである。特に容量２００〜１０
００ｍｌの小容量容器は重量のバランスが悪ので脚部の
賦形性を良好にして自立安定性を向上する必要がある。SUMMARY OF THE INVENTION The present invention provides a self-supporting container having a bottom surface that does not deform with time even if it contains gas-containing contents. Especially capacity 200-10
Since a small volume container of 00 ml has a poor weight balance, it is necessary to improve the shapeability of the legs to improve the self-standing stability.
【０００４】[0004]
【課題を解決するための手段】本発明は、 「１． 谷底面により等分割された分割底面部を有する
自立容器であって、 Ａ．二軸延伸された耐圧容器の底面を等中心角で等分す
る、底中央部から外側に向かって上昇傾斜した谷底面
と、谷底面を挾む脚部側壁とからなる谷部と、 Ｂ．脚部側壁と、谷部によって等中心角で等分され底中
央部周縁から延伸された脚部頂面と、谷部により区画さ
れた胴下端部で形成された脚部外側壁とからる、四角台
形状の脚部と、 Ｃ．複数の脚部項面の外円周部からなる接地部と、から
なる、二軸延伸成形した自立容器であり、谷底面が、 ａ．底中央部から底部と胴部の結合部に向かって上昇傾
斜した、水平面と１５度〜２５度の角度をなす平らな面
を有する斜面と、 ｂ．水平面と４５度〜７０度の角度をなす平らな面を有
する傾斜面とが、容器の高さ方向の中心軸線から径方向
に容器の半径の５０％〜７５％の位置で、かつ接地面か
ら高さ方向に胴部直径の８％〜２０％の位置で交差して
形成された底面である、ことを特徴とする分割底面部を
有する二軸延伸成形した自立容器。 ２． 谷底面により等分割された分割底面部を有する自
立容器であって、Ａ．二軸延伸された耐圧容器の底面を
等中心角で等分する、底中央部から外側に向かって上昇
傾斜した谷底面と、谷底面を挾む脚部側壁とからなる谷
部と、 Ｂ．脚部側壁と、谷部によって等中心角で等分された底
中央部周縁から延伸された脚部頂面と、谷部により区画
された胴下端部で形成された脚部外側壁とからる、四角
台形状の脚部と、 Ｃ．複数の脚部頂面の外円周部からなる接地部と、から
なる、二軸延伸成形した自立容器であり、谷底面が、 ａ．原点を容器の高さ方向の中心軸線に対して脚部反対
側に有し底中央部周縁から上方に広がり、容器の胴部の
直径の５０％〜３００％の半径を有する弧面と、 ｂ．水平面と４５度〜７０度の角度をなす傾斜面とが、
中心軸線から径方向に容器胴部の半径の５０％〜７５％
の位置で、かつ接地面から高さ方向に胴部直径の８％〜
２０％の位置で交差して形成された底面である、ことを
特徴とする分割底面部を有する二軸延伸成形した自立容
器。 ３． 弧面がａ．原点を容器の高さ方向の中心軸線上に
有し、容器の胴部の直径の５０〜３００％の半径を有す
る弧面である、２項に記載された二軸延伸成形した自立
容器。 ４． 脚部頂面の外円周部からなる接地部分を結ぶ円弧
の直径が、胴下端部の直径の０．６５〜０．８５倍であ
る、１項ないし３項のいずれか１項に記載された二軸延
伸成形された自立容器。 ５． ａ傾斜面またはａ弧面とｂ傾斜面との交差点が、
容器胴部の直径の５％〜３０％の小さい半径を有する曲
面で連結されている、１項ないし４項のいずれか１項に
記載された二軸延伸成形した自立容器。 ６． ｂ．傾斜面と胴部下端との間に胴部直径に対し５
〜３０％の小径の曲面の連結部を設置した、１項ないし
５項のいずれか１項に記載された二軸延伸成形した自立
容器。 ７． 等中心角による底面の分割が奇数等分である、１
項ないし６項のいずれか１項に記載された二軸延伸成形
した自立容器。 ８． 等中心角による底面の奇数等分割が、３または５
等分割である、１項ないし７項のいずれか１項に記載さ
れた二軸延伸成形した自立容器。 ９． 底中心部を熱結晶化した、１項ないし８項のいず
れか１項に記載された二軸延伸成形した自立容器。 １０． 容器が容量が２００ｍｌ〜１０００ｍｌの小容
量容器である、１項ないし９項のいずれか１項に記載さ
れた二軸延伸成形した自立容器。］に関する。MEANS FOR SOLVING THE PROBLEMS The present invention relates to "1. A self-standing container having a divided bottom portion equally divided by a valley bottom surface, which comprises: A. The bottom surface of a biaxially stretched pressure resistant container at an equal center angle. Equally divided into a valley bottom composed of a valley bottom rising upward from the center of the bottom toward the outside, and a leg side wall sandwiching the valley bottom, and B. Leg side wall and the valley part equally divided by a central angle. A square trapezoidal leg including a top surface of the leg extending from the peripheral edge of the bottom center and an outer wall of the leg formed by the lower end of the body divided by a valley, and C. a plurality of legs A biaxially stretched self-supporting container consisting of a grounding part consisting of the outer circumferential part of the facet, the bottom surface of the valley being inclined upward from the center part of the bottom toward the connecting part of the bottom part and the body part, A slope having a flat surface forming an angle of 15 to 25 degrees with the horizontal plane, and b. A flat surface forming an angle of 45 to 70 degrees with the horizontal plane. The inclined surface having another surface is at a position of 50% to 75% of the radius of the container in the radial direction from the central axis of the height direction of the container, and 8% of the diameter of the body part in the height direction from the ground contact surface. A biaxially stretch-molded self-supporting container having a split bottom surface, which is a bottom surface formed by intersecting at a position of 20% 2. A self-supporting container having a split bottom surface equally divided by a valley bottom surface A. A valley consisting of a valley bottom that equally divides the bottom surface of the biaxially stretched pressure-resistant container at an equal central angle and that rises upward from the center of the bottom toward the outside, and a leg side wall that sandwiches the valley bottom. Section, B. Leg side wall, leg top surface extending from the bottom center peripheral edge equidistantly divided by the valley section, and leg section formed by the trunk lower end section partitioned by the valley section A square trapezoidal leg portion including the outer wall, and C. a ground contact portion including outer circumferential portions of the top surfaces of the leg portions. It is a biaxially stretch-molded self-supporting container whose bottom bottom has a. The origin is on the side opposite to the leg with respect to the center axis in the height direction of the container and spreads upward from the peripheral edge of the bottom center. An arc surface having a radius of 50% to 300% of the diameter of the part, and b. An inclined surface forming an angle of 45 degrees to 70 degrees with the horizontal plane,
50% to 75% of the radius of the container body in the radial direction from the central axis
8% of the diameter of the body at the position
A biaxially stretched self-supporting container having a divided bottom surface, which is a bottom surface formed by intersecting at a position of 20%. 3. The arc surface is a. The biaxially stretched self-supporting container according to item 2, which is an arc surface having an origin on the center axis of the container in the height direction and having a radius of 50 to 300% of the diameter of the body of the container. 4. The diameter of an arc connecting the ground contacting portion formed of the outer circumferential portion of the top surface of the leg is 0.65 to 0.85 times the diameter of the lower end of the trunk. Biaxially stretched freestanding container. 5. The intersection of a slanted surface or a curved surface and b slanted surface is
The biaxially stretched self-supporting container according to any one of items 1 to 4, which is connected by a curved surface having a small radius of 5% to 30% of the diameter of the container body. 6. b. 5 between the inclined surface and the lower end of the body
The biaxially stretch-molded self-supporting container according to any one of items 1 to 5, which is provided with a curved connecting portion having a small diameter of -30%. 7. The division of the bottom by the equicenter angle is odd even division, 1
Item 7. A self-supporting container that is biaxially stretch-molded according to any one of items 1 to 6. 8. Odd equal division of the bottom by equal center angle is 3 or 5
The biaxially stretched self-supporting container according to any one of items 1 to 7, which is equally divided. 9. The biaxially stretched self-standing container according to any one of items 1 to 8, wherein the center of the bottom is thermally crystallized. 10. The biaxially stretch-molded self-supporting container according to any one of items 1 to 9, wherein the container has a small capacity of 200 ml to 1000 ml. ].
【０００５】[0005]
【発明の実施の形態】内容量が１０００ｍｌ以下の小容
量容器では、特公昭４８−５７０８号公報等に開示され
た従来の底部形状では熱水殺菌時に底中央部が膨出する
等の変形が発生し充分な耐圧性が得られない。また、果
汁や乳酸菌を含むガス含有飲料を冷間充填した容器を熱
水殺菌すると、容器内の内圧が高くなると共に容器を構
成する材料の剛性が失われて容器の耐熱圧性が低下する
が、小容量容器ではこの傾向が著しい。ここで言う耐熱
圧性とは、ガス含有飲料を充填した容器を熱水等で殺菌
する場合、これに耐える性能を意味する。従来用いられ
ている耐熱圧性容器としては、特公平７−３７２６０号
公報に記載されているように容器の半球形状の底部にベ
ースカップを装着するものである。しかしながら、使用
済みの容器を資源として再利用するためには容器と材質
の異なるベースカップを使用することができないが、自
立のため脚部を形成して同一材質の容器とすると谷底面
を半球殻の一部としても耐熱圧性は良好とならない。BEST MODE FOR CARRYING OUT THE INVENTION In a small-capacity container having an internal capacity of 1000 ml or less, the conventional bottom shape disclosed in Japanese Patent Publication No. 48570/1988 causes deformation such as bulging at the center of the bottom during hot water sterilization. Occurs, and sufficient pressure resistance cannot be obtained. Further, when hot water sterilization of a container cold-filled with a gas-containing beverage containing fruit juice or lactic acid bacteria, the internal pressure in the container increases and the rigidity of the material forming the container is lost, and the heat and pressure resistance of the container decreases, This tendency is remarkable in a small capacity container. The heat and pressure resistance referred to here means the ability to withstand a container filled with a gas-containing beverage when the container is sterilized with hot water or the like. As a heat and pressure resistant container that has been conventionally used, a base cup is attached to the hemispherical bottom of the container as described in JP-B-7-37260. However, in order to reuse a used container as a resource, it is not possible to use a base cup of a different material from that of the container, but if the legs are formed to make it a container of the same material for self-supporting, the bottom of the valley has a hemispherical shell. The heat and pressure resistance is not good even as a part of.
【０００６】本発明者は種々研究した結果、容器底面の
谷部に直線部分を有さない半球形状や特公昭５９−４０
６９３号公報に開示された部分的に直線部分を有する従
来の底部形状では小容量容器としたとき耐変形強度が弱
く充分な耐圧性が得られないことが判明した。さらに研
究した結果、小容量容器は谷部が半球殻の一部をなす形
状では耐熱圧性は良くならないことがわかった。谷部が
弧状部分と直線状部分の組み合わせからなる場合でも、
弧状部分の交差する位置が径方向及び高さ方向で特定範
囲の位置にないと、耐熱圧性が悪く、経時変化が大き
い。また、弧状部分の半径が容器胴部の直径の５０〜３
００％でないと耐熱圧性が悪く、経時変化が発生する。
弧状部分の半径は５０％〜３００％、特に５０〜２００
％の範囲にあるのが好ましい。弧状部分の半径が５０％
未満であれば耐熱圧性が悪く、経時変化も大きい。As a result of various studies conducted by the present inventor, a hemispherical shape having no straight portion in the valley portion on the bottom surface of the container and Japanese Patent Publication No. 59-40.
It was found that the conventional bottom shape having a partially linear portion disclosed in Japanese Patent No. 693 has a weak deformation resistance strength and cannot obtain sufficient pressure resistance in a small capacity container. As a result of further studies, it was found that the heat resistance and pressure resistance of the small-capacity container are not improved when the valley portion forms a part of the hemispherical shell. Even if the valley consists of a combination of arcuate parts and straight parts,
If the intersecting positions of the arcuate portions are not within the specific range in the radial direction and the height direction, the heat and pressure resistance is poor and the change over time is large. In addition, the radius of the arc-shaped portion is 50 to 3 of the diameter of the container body.
If it is not 00%, the heat and pressure resistance is poor and a change with time occurs.
The radius of the arcuate portion is 50% to 300%, especially 50 to 200
%. 50% radius of arc
If it is less than 1, the heat and pressure resistance is poor and the change over time is large.
【０００７】本発明は容器の底面を形成する谷底面が、
水平面と１５〜２５度の角度をなす平らな面を有するａ
傾斜面と、水平面と４５〜７０度の角度をなす平らな面
を有するｂ傾斜面とで形成されているところに大きな特
徴があるが、それだけでは経時変化を防止することはで
きない。この二傾斜面を特定の位置で交差して谷底面を
形成するところにも重要な特徴がある。前記二傾斜面は
容器の中心軸から径方向に容器胴部の半径の５０％〜７
５％高さ方向に容器胴部の直径の８％〜２０％の位置で
交差しなければならない。この二傾斜面の傾斜角度は夫
々前述の１５度〜２５度、４５〜７０度であり、交差位
置が前記の位置にあると、ガス含有内容物を収納して放
置したときの経時変化は、ａ傾斜面が容器の外方に膨出
し、ｂ傾斜面が容器の内方に膨出するように作用し、変
形を防止するが、この両傾斜面の交差点が変形の反点と
なる。そして、二傾斜面の傾斜角度が重要であり、ａ傾
斜面の傾斜角度が１５度未満では底部の変形が大きくな
り、２５度を越えても賦形性が悪くなる。またｂ傾斜面
の傾斜角度が４５度未満では賦形性が悪くなり、７０度
を越えると底部の変形が大きくなる。さらに傾斜した二
傾斜面の交差する位置も重要であって、交差点は中心軸
線から径方向に容器胴部の半径の５０％〜７５％、接地
面から高さ方向に容器胴部の直径の８％〜２０％の位置
で交差しなければならない。交差位置が径方向に容器胴
部の半径の５０％より小さければ賦形性が悪くなり、７
５％より大きければ底部の変形が大きくなり、かつ接地
面から高さ方向に容器胴部の直径の８％より小さいと底
部の変形が大きくなり、２０％を越えると賦形性が悪く
なるからである。According to the present invention, the bottom of the valley forming the bottom of the container is
A having a flat surface forming an angle of 15 to 25 degrees with a horizontal plane
It has a great feature in that it is formed by the inclined surface and the b inclined surface having a flat surface that makes an angle of 45 to 70 degrees with the horizontal plane, but this alone cannot prevent the change over time. There is also an important feature in that the valley bottom is formed by intersecting these two inclined surfaces at a specific position. The two inclined surfaces are 50% to 7% of the radius of the container body in the radial direction from the center axis of the container.
It must intersect in the direction of 5% height at 8% to 20% of the diameter of the container body. The inclination angles of the two inclined surfaces are 15 degrees to 25 degrees and 45 degrees to 70 degrees, respectively, and when the intersecting position is at the position described above, the change with time when the gas-containing contents are stored and left as they are, The inclined surface a bulges outward of the container and the inclined surface b bulges inward of the container to prevent deformation. The intersection of the inclined surfaces is the opposite point of deformation. The inclination angle of the two inclined surfaces is important. If the inclination angle of the a inclined surface is less than 15 degrees, the deformation of the bottom portion becomes large, and even if it exceeds 25 degrees, the shapeability deteriorates. Further, if the inclination angle of the inclined surface b is less than 45 degrees, the shapeability becomes poor, and if it exceeds 70 degrees, the deformation of the bottom portion becomes large. It is also important that the position where the two inclined surfaces intersect is 50% to 75% of the radius of the container body in the radial direction from the central axis, and 8% of the diameter of the container body in the height direction from the ground contact surface. Must intersect at% -20%. If the intersecting position is smaller than 50% of the radius of the body of the container in the radial direction, the formability will deteriorate, and
If it is more than 5%, the deformation of the bottom will be large, and if it is less than 8% of the diameter of the container body in the height direction from the ground contact surface, the deformation of the bottom will be large, and if it exceeds 20%, the formability will deteriorate. Is.
【０００８】底中央部から底部と胴部の結合部に向って
上昇傾斜した水平面と１５度〜２５度の角度をなす平ら
な面を有するａ傾斜面は中心軸線上に半径の原点をもつ
弧面に比べて応力集中点が底中央部側から谷部側に移行
するので底部の変形が防止される。このａ傾斜面に代え
て、容器の胴部の直径の５０％〜３００％の半径の弧面
を設けることもできる。ｂ傾斜面は前述の通り直線状の
斜面である。この弧面とｂ傾斜面との交差位置は同様に
容器の径方向に中心軸線から容器胴部の半径の５０％〜
７５％の位置で、かつ接地面から高さ方向に容器胴部直
径の８％〜２０％の位置で交差しなければならない。An inclined surface a having a flat surface forming an angle of 15 to 25 degrees with a horizontal plane inclined upward from the center of the bottom toward the joint between the bottom and the body is an arc having a radius origin on the central axis. Since the stress concentration point shifts from the bottom central portion side to the valley portion side as compared with the surface, deformation of the bottom portion is prevented. An arc surface having a radius of 50% to 300% of the diameter of the body of the container can be provided instead of the inclined surface a. The b inclined surface is a linear inclined surface as described above. The intersection of this arc surface and the inclined surface b is also 50% to 50% of the radius of the container body from the central axis in the radial direction of the container.
It must intersect at a position of 75% and at a position of 8% to 20% of the diameter of the container body in the height direction from the ground contact surface.
【０００９】ｂ傾斜面と胴下端部の結合部には、小半径
の曲面の連結部を設けるが、ｂ傾斜面が平らな面である
ので、この連結部を設けることにより結合部に急激な変
曲点が発生せず、応力の集中が防止され、経時変形を防
ぐことができる。この連結部は半径は胴部の直径に対し
て５〜３０％の小径の曲面である。連結部の半径が５％
未満では応力集中が生じて変形が起り、３０％を越えて
も同様な現象が生じる。脚部頂面の周辺を結ぶ円弧が有
効な自立安定効果を奏するが、この円弧の半径が胴部の
直径の０．６５〜０．８５倍の範囲にあると自立性が良
好となる。この円弧の径が０．６５倍未満では自立安定
性に欠け、０．８５を越えると賦形性が悪くなる。A connecting portion having a curved surface with a small radius is provided at the connecting portion between the inclined surface b and the lower end portion of the body. However, since the inclined surface b is a flat surface, the connecting portion is sharply provided by the connecting portion. An inflection point does not occur, concentration of stress is prevented, and time-dependent deformation can be prevented. The connecting portion is a curved surface having a small radius of 5 to 30% with respect to the diameter of the body portion. The radius of the connecting part is 5%
When it is less than 30%, stress concentration occurs and deformation occurs, and even when it exceeds 30%, the same phenomenon occurs. An arc connecting the periphery of the top surface of the leg has an effective self-sustaining stabilizing effect. When the radius of this arc is in the range of 0.65 to 0.85 times the diameter of the body, the self-sustaining property becomes good. If the diameter of the circular arc is less than 0.65 times, the self-standing stability is lacking, and if it exceeds 0.85, the shapeability deteriorates.
【００１０】ａ傾斜面またはａ弧面とｂ傾斜面との交差
点を容器胴部の直径の５％〜３０％の小さい半径を有す
る弧面で連結すると応力の集中が防止され、経時変形が
防げる。また、底面は奇数等分に分割すると耐圧性、自
立性が良く、特に５等分割することが好ましい。底中央
部を熱結晶化すると未延伸ないし低延仲のこの部分の剛
性や耐熱性が向上する。本発明の特別の構成の容器は、
内容が２００ｍｌ〜１０００ｍｌの小容量容器において
特に優れた効果を奏する。このような小容量容器では経
時変形が大きく、底中央部が突出して接地する問題が多
かったが、本発明により解決することができた。本発明
で使用する合成樹脂としては、ポリエステル樹脂が挙げ
られ、特にポリエチレンテレフタレート（ＰＥＴ）、こ
れを主体とする共重合体やブレンド物が好ましい。二軸
延仲成形は通常のブロー成形が用いられる。If the intersection of the a-sloping surface or the a-sloping surface and the b-sloping surface is connected by an arc surface having a small radius of 5% to 30% of the diameter of the container body, stress concentration can be prevented and deformation over time can be prevented. . Further, if the bottom surface is divided into an equal number of odd parts, the pressure resistance and the self-supporting property are good, and it is particularly preferable to divide it into five parts. Thermal crystallization of the center of the bottom improves the rigidity and heat resistance of this unstretched or low-stretched portion. The specially constructed container of the present invention is
Particularly excellent effect is exhibited in a small capacity container having a content of 200 ml to 1000 ml. In such a small-capacity container, there were many problems in that the deformation with time was large and the center part of the bottom was projected and grounded, but the present invention could solve the problem. As the synthetic resin used in the present invention, a polyester resin can be mentioned, and polyethylene terephthalate (PET), and a copolymer or a blend thereof mainly composed of this are preferable. Ordinary blow molding is used for the biaxial rolling process.
【００１１】[0011]
【実施例】図面に基づいて本発明を説明する。The present invention will be described with reference to the drawings.
【００１２】図１は本発明の二軸延伸成形した内容量５
００ｍｌの自立容器である。１は容器、２は胴部であ
り、３は底部である。底部は谷部面、脚部４及び底中央
部から形成されており、連結部７で胴下端部と結合して
いる。５は脚部の頂面の外周部であり、接地部である。
６は脚部側壁、１２は容器の高さ方向の中心軸線であ
る。FIG. 1 shows the biaxially stretch-molded internal volume 5 of the present invention.
It is a free-standing container of 00 ml. Reference numeral 1 is a container, 2 is a body portion, and 3 is a bottom portion. The bottom is formed by the valley surface, the legs 4 and the center of the bottom, and is connected to the lower end of the trunk by the connecting portion 7. Reference numeral 5 is an outer peripheral portion of the top surface of the leg portion, which is a ground contact portion.
6 is a side wall of the leg portion, and 12 is a central axis line in the height direction of the container.
【００１３】図２は中心軸線１２に沿った底部の断面を
示す。８は底中央部であり、延伸されていないので厚肉
となっているが、熱結晶化されている。９は底中央部か
ら径方向外方に上昇傾斜した水平面と２０度の角度を有
する平らな面を有する傾斜面であって、本発明で言うａ
斜面である。１０は水平面と６０度の傾斜角度をなす平
らな面を有する傾斜面であって、本発明で言うｂ傾斜面
である。ａ傾斜面９とｂ傾斜面１０は、中心軸線１２か
ら径方向に胴部の半径３５ｍｍの７０％である２５ｍ
ｍ、接地面から高さ方向に胴部の直径の約１５％の１０
ｍｍの位置の交差点１３で結合し、谷底面を形成してい
る。この交差点は半径１２ｍｍの小さな曲面で形成され
ている。ｂ傾斜面１０は胴下端部の連続部１１で胴下端
部と結合しているが、この連結部１１は小さい半径をも
つ曲面になっている。FIG. 2 shows a cross section of the bottom along the central axis 12. 8 is the center of the bottom, which is thick because it has not been stretched, but has been thermally crystallized. Reference numeral 9 denotes an inclined surface having a flat surface having an angle of 20 degrees with a horizontal surface which is inclined upward in the radial direction from the center of the bottom.
It is a slope. Reference numeral 10 is an inclined surface having a flat surface forming an inclination angle of 60 degrees with the horizontal plane, which is the b inclined surface referred to in the present invention. The a-sloping surface 9 and the b-sloping surface 10 are 25 m, which is 70% of the radius 35 mm of the body in the radial direction from the central axis 12.
m, 10% of the diameter of the trunk in the height direction from the contact surface
It joins at the intersection 13 at a position of mm to form a valley bottom surface. This intersection is formed by a small curved surface with a radius of 12 mm. The b inclined surface 10 is connected to the lower end of the body at a continuous portion 11 at the lower end of the body, but the connecting portion 11 is a curved surface having a small radius.
【００１４】図３は別の実施例であって、図２のａ傾斜
面の代わりに４２ｍｍの半径を有する弧面１１とした以
外は図２と同様にした実施例である。FIG. 3 shows another embodiment which is the same as that of FIG. 2 except that an arc surface 11 having a radius of 42 mm is used instead of the inclined surface a in FIG.
【００１５】図４は図２の容器の底面１４を示し、ａ傾
斜面とｂ傾斜面１０とは交差点１３で結合している。FIG. 4 shows the bottom surface 14 of the container of FIG. 2 in which the a-sloping surface and the b-sloping surface 10 are joined at an intersection 13.
【００１６】図５は比較例であり弧面とｂ傾斜面からな
る底面を示す。図６は弧面からなる底面を示す比較例で
ある。次に容器の具体例および比較例との性能の比較試
験を示す。FIG. 5 is a comparative example and shows a bottom surface composed of an arc surface and an inclined surface b. FIG. 6 is a comparative example showing a bottom surface formed of an arc surface. Next, a comparative test of the performance with specific examples of containers and comparative examples will be shown.
【００１７】実施例１ ＰＥＴを用いて射出成形した径２２ｍｍ、長さ１０５ｍ
ｍのＰＥＴ製プリフォームを用いて二軸延伸ブロー成形
し、図１、図２、図４に示す内容量５００ｍｌの容器を
製造した。ａ傾斜面の角度は２０度であり、ｂ傾斜面は
６０度であった。両斜面は中心軸から４８ｍｍの距離で
結合している。谷底の巾は４ｍｍである。Example 1 Diameter 22 mm and length 105 m injection-molded using PET
m PET preform was used to carry out biaxial stretch blow molding to produce a container having an internal capacity of 500 ml shown in FIGS. 1, 2, and 4. The angle of the a inclined surface was 20 degrees, and the angle of the b inclined surface was 60 degrees. Both slopes are joined at a distance of 48 mm from the central axis. The width of the valley bottom is 4 mm.
【００１８】実施例２ 底中央部周縁から上方に広がる弧面と、胴下端部より絞
り込まれるｂ傾斜面の角度は６０度で弧面との交点の位
置が、径方向５０ｍｍ、高さ方向１１ｍｍの位置にあ
り、弧面の半径は４２ｍｍであった。谷底の巾は４ｍｍ
である。Example 2 The angle between the arc surface expanding upward from the peripheral edge of the bottom center and the inclined surface b narrowed from the lower end of the body is 60 degrees, and the position of the intersection point with the arc surface is 50 mm in the radial direction and 11 mm in the height direction. The radius of the arc surface was 42 mm. The width of the valley bottom is 4 mm
It is.
【００１９】実施例３ ＰＥＴを用いて射出成形した径２２ｍｍ、長さ１０５ｍ
ｍのＰＥＴ製プリフォームを用いて二軸延伸ブロー成形
し、図１、図３、図４に示す内容量５００ｍｌの容器を
製造した。底中央部周縁から上方に広がる弧面と、胴下
端部より絞り込まれるｂ傾斜面の角度は６０度で弧面と
の交点の位置が、径方向４８ｍｍ、高さ方向１０ｍｍの
位置にあり、弧面の半径は４６ｍｍであった。谷底の巾
は４ｍｍである。Example 3 Diameter 22 mm and length 105 m injection-molded using PET
m PET preform was used for biaxial stretch blow molding to produce a container having an internal capacity of 500 ml shown in FIGS. 1, 3 and 4. The angle between the arc surface that spreads upward from the peripheral edge of the bottom center and the b inclined surface that is narrowed down from the lower end of the trunk is 60 degrees, and the intersection point with the arc surface is 48 mm in the radial direction and 10 mm in the height direction. The radius of the surface was 46 mm. The width of the valley bottom is 4 mm.
【００２０】比較例１ 図５に示す底面を有する容器であって、底中央部周縁か
ら上方に広がる半径２５ｍｍの弧面と、前記弧面に接し
胴下端部まで上方傾斜するｂ傾斜面の角度は６０度であ
った。谷底の巾は４ｍｍである。弧面の原点は容器高さ
方向の中心線より脚部側にある。Comparative Example 1 In a container having a bottom surface shown in FIG. 5, an angle between an arc surface having a radius of 25 mm which spreads upward from the peripheral edge of the bottom center and an inclined surface b which is in contact with the arc surface and inclines upward to the lower end of the body. Was 60 degrees. The width of the valley bottom is 4 mm. The origin of the arc surface is on the leg side from the center line in the container height direction.
【００２１】比較例２ 図６に示される底面を有する容器であって、、底中央部
周縁から上方に広がるａ弧面と、前記弧面に接し胴下端
部までなだらかに接合するｂ弧面、全体として楕円状に
なる谷底面の夫々の弧面の半径は、ａ弧面４２ｍｍｂ弧
面２２ｍｍである。谷底の巾は４ｍｍである。ｂ傾斜面
がない例である。 ［評価方法］各例共１００本に４ＧＶの炭酸水を充填
し、３７℃１ＷＥＥＫの底部変化量と０．２％アルカリ
浸漬でのストレスクラッキングの発生本数を調べた。結
果を表１と表２に示す。 ４ＧＶ−３７℃１ＷＥＥＫの底部変化量Comparative Example 2 A container having a bottom surface shown in FIG. 6, wherein an a-shaped arc surface extending upward from the peripheral edge of the center of the bottom and a b-shaped arc surface which is in contact with the arc surface and gently joins to the lower end of the body, The radius of each arc surface of the valley bottom which becomes elliptical as a whole is a arc surface 42 mm b arc surface 22 mm. The width of the valley bottom is 4 mm. In this example, there is no inclined surface b. [Evaluation method] In each example, 100 pieces were filled with 4 GV of carbonated water, and the bottom change amount at 37 ° C and 1 WEEK and the number of stress cracking occurrences in 0.2% alkali immersion were examined. The results are shown in Tables 1 and 2. 4GV-37 ° C 1WEEK bottom change
【００２２】[0022]
【表１】 [Table 1]
【００２３】（註）比較例１、比較例２はロッカーボト
ムとなった。 ストレスクラッキングの発生本数(Note) Comparative Examples 1 and 2 were rocker bottoms. Number of stress cracking occurrences
【００２４】[0024]
【表２】 [Table 2]
【００２５】この試験結果から本発明容器は耐ストレス
クラッギング性、耐変形性に優れていることが理解され
る。From the results of this test, it is understood that the container of the present invention is excellent in resistance to stress cracking and deformation.
【００２６】[0026]
【発明の効果】本発明は小容量容器であっても脚部の賦
形性が良好で耐熱圧性に優れ、耐ＥＳＣ性も良く自立安
定性に優れた効果を奏する。EFFECTS OF THE INVENTION The present invention has an effect that, even in a small-capacity container, the leg shape is good, the heat and pressure resistance is excellent, the ESC resistance is good, and the self-sustaining stability is excellent.
【図１】自立容器の正面図である。FIG. 1 is a front view of a self-supporting container.
【図２】本発明の実施例の容器の底部の高さ方向の断面
図である。FIG. 2 is a sectional view in the height direction of the bottom portion of the container according to the embodiment of the present invention.
【図３】他の実施例の底部の高さ方向の断面図である。FIG. 3 is a sectional view in the height direction of a bottom portion of another embodiment.
【図４】底部の説明図である。FIG. 4 is an explanatory diagram of a bottom portion.
【図５】比較例の底部の説明図である。FIG. 5 is an explanatory diagram of a bottom portion of a comparative example.
【図６】他の比較例の底部の説明図である。FIG. 6 is an explanatory diagram of a bottom portion of another comparative example.
１ 容器 ２ 胴部 ３ 底部 ４ 脚部 ５ 接地部 ６ 脚部側壁 ７ 連結部 ８ 底中央部 ９ ａ傾斜面 １０ ｂ傾斜面 １１ 弧面 １２ 容器中心軸線 １３ 交差点 １４ 底面 1 container 2 body part 3 bottom part 4 leg part 5 ground part 6 leg part side wall 7 connecting part 8 bottom center part 9 a inclined surface 10 b inclined surface 11 arc surface 12 container center axis 13 intersection point 14 bottom surface
Claims (10)
有する自立容器であって、 Ａ．二軸延伸された耐圧容器の底面を等中心角で等分す
る、底中央部から外側に向かって上昇傾斜した谷底面
と、谷底面を挾む脚部側壁とからなる谷部と、 Ｂ．脚部側壁と、谷部によって等中心角で等分され底中
央部周縁から延伸された脚部頂面と、谷部により区画さ
れた胴下端部で形成された脚部外側壁とからる、四角台
形状の脚部と、 Ｃ．複数の脚部頂面の外円周部からなる接地部と、から
なる、二軸延伸成形した自立容器であり、 谷底面が、 ａ．底中央部から底部と胴部の結合部に向かって上昇傾
斜した、水平面と１５度〜２５度の角度をなす平らな面
を有する斜面と、 ｂ．水平面と４５度〜７０度の角度をなす平らな面を有
する傾斜面とが、 容器の高さ方向の中心軸線から径方向に容器の半径の５
０％〜７５％の位置で、かつ接地面から高さ方向に胴部
直径の８％〜２０％の位置で交差して形成された底面で
ある、ことを特徴とする分割底面部を有する二軸延伸成
形した自立容器。1. A self-supporting container having a divided bottom portion equally divided by a valley bottom, which comprises: B. a bottom portion of a biaxially stretched pressure-resistant container, which is equally divided by an equal center angle, and which includes a valley bottom surface which is inclined upward from a center portion of the bottom toward the outside, and a leg side wall which sandwiches the valley bottom surface; The leg side wall, the leg top surface extended equally from the bottom center portion peripheral edge at an equal center angle by the trough, and the leg outer wall formed by the trunk lower end section partitioned by the trough, A square trapezoidal leg, and C.I. A biaxially stretch-molded self-supporting container comprising a ground contact portion composed of an outer circumferential portion of a plurality of leg top surfaces, wherein the valley bottom surface comprises: a. A slope having a flat surface that is inclined upward from the center of the bottom toward the joint between the bottom and the body and forms an angle of 15 to 25 degrees with a horizontal plane; b. The inclined surface having a flat surface that makes an angle of 45 to 70 degrees with the horizontal plane is 5 times the radius of the container in the radial direction from the central axis of the height direction of the container.
It is a bottom surface formed at a position of 0% to 75% and at a position of 8% to 20% of the diameter of the body portion in the height direction from the ground contact surface. Axial stretch molded freestanding container.
有する自立容器であって、 Ａ．二軸延伸された耐圧容器の底面を等中心角で等分す
る、底中央部から外側に向かって上昇傾斜した谷底面
と、谷底面を挾む脚部側壁とからなる谷部と、 Ｂ．脚部側壁と、谷部によって等中心角で等分された底
中央部周縁から延伸された脚部頂面と、谷部により区画
された胴下端部で形成された脚部外側壁とからる、四角
台形状の脚部と、 Ｃ．複数の脚部頂面の外円周部からなる接地部と、から
なる、二軸延伸成形した自立容器であり、 谷底面が、 ａ．原点を容器の高さ方向の中心軸線に対して脚部反対
側に有し底中央部周縁から上方に広がり、容器の胴部の
直径の５０％〜３００％の半径を有する弧面と、 ｂ．水平面と４５度〜７０度の角度をなす傾斜面とが、
中心軸線から径方向に容器胴部の半径の５０％〜７５％
の位置で、かつ接地面から高さ方向に胴部直径の８％〜
２０％の位置で交差して形成された底面である、ことを
特徴とする分割底面部を有する二軸延伸成形した自立容
器。2. A self-supporting container having a divided bottom portion equally divided by a valley bottom, which comprises: B. a bottom portion of a biaxially stretched pressure-resistant container, which is equally divided by an equal center angle, and which includes a valley bottom surface which is inclined upward from a center portion of the bottom toward the outside, and a leg side wall which sandwiches the valley bottom surface; Consists of a leg side wall, a leg top surface extending from the peripheral edge of the bottom center that is equally divided by a trough, and a leg outer wall formed by the lower end of the trunk sectioned by the trough. , Square trapezoidal legs, C.I. A biaxially stretch-molded self-supporting container comprising a ground contact portion composed of an outer circumferential portion of a plurality of leg top surfaces, wherein the valley bottom surface comprises: a. An arc surface having an origin on the side opposite to the leg with respect to the center axis in the height direction of the container, extending upward from the peripheral edge of the bottom center, and having a radius of 50% to 300% of the diameter of the body of the container; ． An inclined surface that makes an angle of 45 to 70 degrees with the horizontal plane,
50% to 75% of the radius of the container body in the radial direction from the central axis
8% of the diameter of the body at the position
A biaxially stretched self-supporting container having a divided bottom surface, which is a bottom surface formed by intersecting at a position of 20%.
軸線上に有し、容器の胴部の直径の５０〜３００％の半
径を有する弧面である、請求項２に記載された二軸延伸
成形した自立容器。3. The arc surface is a. The biaxially stretched self-supporting container according to claim 2, which is an arc surface having an origin on a center axis in a height direction of the container and having a radius of 50 to 300% of a diameter of a body of the container.
結ぶ円弧の直径が、胴下端部の直径の０．６５〜０．８
５倍である、請求項１ないし３のいずれか１項に記載さ
れた二軸延伸成形された自立容器。4. The diameter of an arc connecting the ground contact portion formed by the outer circumferential portion of the top surface of the leg portion is 0.65 to 0.8 of the diameter of the lower end portion of the trunk.
The biaxially stretched, self-supporting container according to any one of claims 1 to 3, which has a size of 5 times.
差点が、容器胴部の直径の５％〜３０％の小さい半径を
有する曲面で連結されている、請求項１ないし４のいず
れか１項に記載された二軸延伸成形した自立容器。5. An intersection of an inclined surface a or an arc surface and an inclined surface b is connected by a curved surface having a small radius of 5% to 30% of the diameter of the container body. The biaxially stretch-molded self-supporting container described in any one of items.
に対し５〜３０％の小径の曲面の連結部を設置した、請
求項１ないし５のいずれか１項に記載された二軸延伸成
形した自立容器。6. b. The biaxially stretch-molded self-standing according to any one of claims 1 to 5, wherein a connecting portion having a curved surface having a small diameter of 5 to 30% of the diameter of the body is provided between the inclined surface and the lower end of the body. container.
ある、請求項１ないし６のいずれか１項に記載された二
軸延伸成形した自立容器。7. The biaxially stretched self-supporting container according to claim 1, wherein the division of the bottom surface by the equicenter angle is an odd number of divisions.
または５等分割である、請求項１ないし７のいずれか１
項に記載された二軸延伸成形した自立容器。8. The odd-numbered even division of the bottom surface by the equal center angle is 3
Or any one of claims 1 to 7, which is divided into 5 equal parts.
The self-supporting container which is biaxially stretch-molded according to the item 1.
し８のいずれか１項に記載された二軸延伸成形した自立
容器。9. The biaxially stretch-molded self-supporting container according to claim 1, wherein the center of the bottom is thermally crystallized.
ｌの小容量容器である、請求項１ないし９のいずれか１
項に記載された二軸延伸成形した自立容器。10. The container has a capacity of 200 ml to 1000 m.
10. The container according to claim 1, which is a small capacity container of 1 l.
The self-supporting container which is biaxially stretch-molded according to the item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16653596A JP3632302B2 (en) | 1996-05-24 | 1996-05-24 | Self-supporting container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16653596A JP3632302B2 (en) | 1996-05-24 | 1996-05-24 | Self-supporting container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09315419A true JPH09315419A (en) | 1997-12-09 |
| JP3632302B2 JP3632302B2 (en) | 2005-03-23 |
Family
ID=15833099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16653596A Expired - Fee Related JP3632302B2 (en) | 1996-05-24 | 1996-05-24 | Self-supporting container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3632302B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002166916A (en) * | 2000-11-29 | 2002-06-11 | Yoshino Kogyosho Co Ltd | Biaxial drawing blow-molded light-weighted bottle container made of synthetic resin and manufacturing method thereof |
| JP2021020709A (en) * | 2019-07-29 | 2021-02-18 | 株式会社吉野工業所 | Pressure-resistant bottle |
-
1996
- 1996-05-24 JP JP16653596A patent/JP3632302B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002166916A (en) * | 2000-11-29 | 2002-06-11 | Yoshino Kogyosho Co Ltd | Biaxial drawing blow-molded light-weighted bottle container made of synthetic resin and manufacturing method thereof |
| JP2021020709A (en) * | 2019-07-29 | 2021-02-18 | 株式会社吉野工業所 | Pressure-resistant bottle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3632302B2 (en) | 2005-03-23 |
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