JP2007297058A - Plastic bottle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plastic bottle capable of improving ease-to-hold performance and portability by paying attention to a practical flat bottle taking consumers' needs into consideration. <P>SOLUTION: In a plastic bottle (1) having a mouth (2) being an outlet for a beverage, and a main body (3) communicating with the mouth (2) and capable of storing the beverage therein, when the dimension of the width of the main body (3) is W, and the dimension of the depth is D, 1.2≤W/D≤1.8, and 40 mm≤D≤60 mm. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a plastic bottle for beverages.

  In general, plastic bottles typified by PET bottles are widely known as containers for filling beverages such as juices and soft drinks. Plastic bottles are commercially available from small sizes of 500 ml or less, medium sizes of around 1000 ml, and large sizes such as 1500 to 2000 ml. Consumers store relatively large medium-sized and large-sized bottles in a refrigerator, etc., and pour them into a cup as needed, while small bottles of 500 m or less can be carried in bags or carried on the desk. There is a drinking habit of placing a small amount directly and drinking directly.

  Bottles are designed in a variety of heights and shapes. The height of the bottle is designed according to the shelf of the sales floor or the pocket of the refrigerator, and is designed to be 218 mm, for example. Moreover, the cross section of the bottle is designed in various shapes, mainly circular or square. Among them, a bottle called a flat shape whose cross section is close to a rectangle or an ellipse is being developed due to the tendency of consumer convenience and aesthetics (see, for example, Patent Documents 1 and 2).

  Conventional bottles called flat are manufactured by a blow molding method using a hot parison method or a cold parison method (see, for example, Patent Documents 2 to 4). When this type of bottle is molded using a parison having a perfect cross section, the stretch amount of the parison is different in the short diameter direction (bottle depth direction) and the long diameter direction (bottle width direction). Thickness varies and it is difficult to obtain the required mechanical strength. Various methods for obtaining the mechanical strength are being developed. As the method, for example, as described in Patent Document 4, a molding method for making the thickness of the bottle uniform is known.

By the way, in each of the above patent documents, a bottle whose cross section is close to a rectangle or an ellipse is referred to as a “flat bottle”, and as a standard representing flatness, for example, the ratio of the trunk maximum major axis to the trunk minimum minor axis (flat ratio) Is used. However, for example, since the flatness ratio shown in Patent Document 2 is 1.1, the cross section is close to a square, and it is difficult to say that this is a flat bottle. Further, although a 2000 ml bottle having a flatness ratio exceeding 1.0 is also commercially available, since it is as long as about 80 mm in the short diameter direction, it is difficult to say that it is a flat bottle as a whole.
JP 2001-48147 A JP 2005-81641 A JP-A-11-170344 JP 2000-127230 A

  Thus, the conventional bottle cannot be said to be substantially flat, and is difficult to grip. Even if it is flat, a large-sized bottle is not portable for consumers. Furthermore, although a flat bottle is considered to fall easily on a desk, it has not been considered at all in the conventional patent literature.

  The present invention has been made by paying attention to a practical flat bottle in consideration of consumer needs, and an object thereof is to provide a plastic bottle capable of improving ease of gripping and portability.

  In order to achieve the above object, a plastic bottle of the present invention is a plastic bottle having a mouth part serving as a beverage outlet and a main body part connected to the mouth part and capable of storing a beverage therein. When the width dimension is W and the depth dimension is D, 1.2 ≦ W / D ≦ 1.8 and 40 mm ≦ D ≦ 60 mm.

  In order to achieve the above object, another plastic bottle of the present invention according to another aspect includes a mouth portion serving as a beverage outlet and a main body portion connected to the mouth portion and capable of storing a beverage therein. In the plastic bottle, the main body portion is formed flat as a whole, and the depth dimension, which is the shorter width and depth of the main body portion, is set to 40 mm or more and 60 mm or less.

  According to these structures, a main-body part can be made substantially flat and the portability of a bottle can be improved. Moreover, since the dimension of the shorter depth is set to 40 mm ≦ D ≦ 60 mm, it is possible to reduce the strain on the consumer who holds the main body and to easily hold the main body. In particular, when the depth dimension is less than 40 mm, the main body becomes difficult to grasp and the stability when the bottle is placed vertically may be impaired. On the other hand, if the depth dimension exceeds 60 mm, the main body cannot be said to be substantially flat, and it becomes difficult to grasp, and for example, it occupies a large space in the consumer's bag, and is portable. May be reduced. In addition, the depth dimension may be specified in the above range, and if W / D exceeds 1.8, the main body may become too flat. The stability of the bottle may be impaired. Moreover, when W / D is less than 1.2, it cannot be said that the main body is flat as a whole.

  According to one aspect of the present invention, the bottom portion of the main body is rounded at both ends in the width direction and both ends in the depth direction, and both ends in the depth direction have a smaller radius than both ends in the width direction ( R) is preferably rounded.

  According to this configuration, the formability of the bottom portion in, for example, blow molding can be improved as compared with the case where round chamfering is not performed. Specifically, the bottom is formed by being stretched to the farthest position from the mouth, but by rounding as described above, the width in the bottom and the both ends in the depth are molded. Easy to do. On the other hand, if the radius of the round chamfer is large, the bottle tends to fall down. In consideration of this situation, the both ends in the depth direction (short direction) where the bottle is likely to fall are made smaller in the radius of round chamfering than both ends in the width direction. By doing so, it is possible to secure the stability of the bottom and to make the bottle difficult to fall.

  According to one aspect of the present invention, the main body has two first side walls that extend substantially in the width direction, and each of the main body parts is located between the two first side walls and is connected to each other. And two second sidewalls extending substantially in the depth direction.

  According to this, a main-body part can be comprised with four side walls.

  According to one aspect of the present invention, it is preferable that at least one of the first side wall and the second side wall is curved outward of the bottle.

  According to this configuration, the main body can be gripped along the consumer's palm. As a result, the fit between the palm and the bottle can be improved, and the bottle can be made easier to hold.

  According to one aspect of the present invention, it is preferable that the corner portion between the first side wall and the second side wall is chamfered or rounded.

  According to this configuration, the fit between the palm and the bottle can be improved and the bottle can be more easily held than the configuration in which the corner portion is square. Further, since the distance between the two corners at the diagonal position is shortened by the amount of chamfering or rounding, the mechanical strength of the main body can be increased.

  According to one aspect of the present invention, it is preferable that the corner portion is chamfered or rounded at a lower value than at the upper portion of the main body portion.

  According to this configuration, it is possible to chamfer or round chamfer the lower part of the main body part, which has a longer distance from the mouth part, at a larger value than the upper part. Thereby, compared with the case where chamfering or round chamfering is constant in the up-and-down direction or the case where the lower part of the main body becomes larger, it is possible to improve the formability in blow molding, for example.

  According to one aspect of the present invention, it is preferable that the distance between the two corner portions at diagonal positions is formed so that the lower portion is shorter than the upper portion of the main body portion.

  According to this configuration, the moldability can be improved as described above.

  According to one aspect of the present invention, it is preferable that the main body has a vacuum absorbing panel on at least two side walls.

  According to this structure, since the decompression in a bottle can be absorbed with a decompression absorption panel, the deformation | transformation of the bottle accompanying decompression can be suppressed.

  According to one aspect of the present invention, it is preferable that the at least two side walls are side walls that substantially extend in the width direction of the main body.

  Compared with the side wall extending in the relatively short depth direction, the side wall extending in the relatively long width direction is large and thus is easily deformed by decompression. By forming the reduced pressure absorption panel on the side wall extending in the relatively long width direction as in the above configuration, it is possible to suitably suppress the deformation of the bottle due to the reduced pressure.

  According to one aspect of the present invention, it is preferable that a concave rib is formed on the main body portion in the circumferential direction.

  Although the substantially flat main body portion as in the present invention has a relatively low lateral rigidity, the lateral rigidity of the main body portion can be increased by forming the rib in the main body portion.

  According to one aspect of the present invention, it is preferable that 4.0 ≦ S / A ≦ 13.0, where A is the cross-sectional area of the mouth and S is the cross-sectional area of the main body.

  According to one embodiment of the present invention, it is preferable that the bottle capacity is 300 to 800 ml, or the bottle height is 140 to 220 mm.

  According to this configuration, if the bottle capacity is 300 ml or more and 800 ml or less, a relatively small-sized flat bottle can be provided. If the bottle height is 140 mm or more and 220 mm or less, the bottle can be appropriately placed on a shelf or pocket such as a sales floor.

  According to one aspect of the present invention, the plastic bottle of the present invention is preferably molded by a stretch molding method by a cold parison method using a parison whose cross section is a perfect circle.

  According to this structure, a substantially flat bottle can be shape | molded from a parison whose cross section is a perfect circle shape. Since it is a parison with a perfect cross section, it can be used to mold other bottles, and productivity can be improved.

  According to the plastic bottle of the present invention described above, the main body can be easily grasped and the portability can be improved.

  Hereinafter, a plastic bottle according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

<First Embodiment>
1 to 3 are a front view, a side view, and a bottom view of a plastic bottle.
The plastic bottle 1 (hereinafter simply referred to as “bottle 1”) is molded by a stretch molding method using a thermoplastic resin such as polyethylene, polypropylene, polyethylene terephthalate, or the like as a main material. The molded bottle 1 is subjected to washing / sterilizing treatment with hot water sterilization, a chlorine-based sterilizing agent, and the like, and then filled with a beverage as a content.

  Examples of the beverage include various non-carbonated beverages such as tea (green tea), oolong tea, black tea, coffee, and fruit juice. Although the bottle 1 of this embodiment can also store carbonated drinks, it is suitable for storing non-carbonated drinks. In another embodiment, the liquid filled in the bottle 1 is not limited to a beverage but may be a food such as a sauce or mirin.

  The bottle 1 has a mouth part 2 and a main body part 3 and is formed flat as a whole. The main body portion 3 integrally has a shoulder portion 11, a trunk portion 12 and a bottom portion 13 in order from the upper side of the central axis YY (vertical axis), thereby constituting a bottle wall capable of storing beverages therein. Yes. The main body 3 has four concave ribs 21, 22, 23, and 24 that are parallel to each other. The rib 21 is formed at the upper part of the main body part 3, the rib 22 is formed at the intermediate part of the main body part 3, and the ribs 23 and 24 are formed at the lower part of the main body part 3.

Here, various terms used in this specification are defined as follows.
The inside of the bottle means a direction closer to the central axis YY than the bottle wall, and the outside of the bottle means a direction farther from the central axis YY than the bottle wall. The width, depth, and height of the bottle 1 refer to the length of the bottle 1 in the left-right direction, the front-rear direction, and the up-down direction of the central axis YY as shown in FIG. The bottle 1 of this embodiment has a depth shorter than the width. The minor axis direction of the bottle 1 refers to the depth direction of the bottle 1, and the major axis direction of the bottle 1 refers to the width direction of the bottle. “Flat” means that the cross-sectional shape of the main body 3 is flat as a whole.

  The bottle 1 of the present embodiment is formed into a flat shape by an injection blow molding method using a cold parison method that is one of stretch molding methods. Since this molding method is known, detailed description thereof will be omitted, and here, the parison used in the cold parison method will be briefly described.

FIG. 6 is a view showing the parison 30.
The parison 30 includes a mouth portion 31 and a main body preform portion 32 connected to the lower end of the mouth portion 31, and these are integrally formed by an injection molding method. The mouth portion 31 has the same shape and the same dimensions as the mouth portion 2 of the bottle 1 that is the final molded product. The main body preform part 32 is a part finally formed on the main body part 3. Each of the mouth portion 31 and the main body preform portion 32 has a perfect circular cross section. For example, the inner diameter of the mouth portion 31 is 21.74 mm. The main body preform portion 32 has a lower outer diameter of 22.75 mm, a height of 65.5 mm, and a wall thickness of 2.8 mm.

  In the parison 30, only the main body preform portion 32 is heated by the cold parison method. Thereafter, a stretching rod is inserted from the mouth portion 31 in the blow mold, the bottom of the main body preform portion 32 is stretched, and compressed air is blown to expand the main body preform portion 32. Adheres closely to the inner surface. And finally, by cooling and solidifying, the bottle 1 having a substantially uniform thickness is formed. In other embodiments, the parison 30 having an irregular cross-sectional shape such as an ellipse may be used, or another forming method may be used.

  It is preferable that the height of the bottle 1 is determined in consideration of the size of the sales floor or the refrigerator of the consumer. In general, sales floors such as supermarkets and convenience stores are often designed to display products with a size of 230 mm if the height of the shelves on which the products are arranged is small. Moreover, in the refrigerator for home use, the height of the pocket is designed so that a 1-liter milk pack can be accommodated. Considering such circumstances, the height of the bottle 1 is preferably 140 mm or more and 220 mm or less, and in this embodiment, the width and depth dimensions and capacity of the bottle 1 described later are also considered to be about 207 mm. It has become.

  If the capacity | capacitance of the bottle 1 is 300 ml or more and 800 ml or less, a comparatively small size flat bottle can be provided, More preferably, it is 300 ml or more and 500 ml or less, and is about 450 ml in this embodiment. And the maximum width and the maximum depth of the bottle 1 of this embodiment are both in the part of the trunk | drum 12, and are 67 mm and 48 mm, respectively (flat ratio: about 1.4). By setting the dimensions of such maximum width and maximum depth, the bottle 1 can be appropriately accommodated in a pocket of a household refrigerator (usually a depth of 71.0 mm) or a bottle holder in a car. ing.

  Again referring to FIGS. 1 to 3, the mouth 2, the shoulder 11, the trunk 12, and the bottom 13, which are parts of the bottle 1, will be described.

  The mouth portion 2 is located at the upper end portion of the bottle 1 and constitutes the minimum diameter portion of the bottle 1. The mouth part 2 is open at the upper end and functions as a beverage supply port, a drinking port, a spout or an outlet. The mouth portion 2 is formed with a vent slot (screw portion) 21 configured to be detachable with a cap (not shown), and a flange portion 22 is formed on the lower side thereof. The cap is rotated between the open position and the closed position by the consumer.

  The shoulder portion 11 is connected to the lower portion of the mouth portion 2, and is formed in a shoulder shape when viewed from the front in FIG. The left and right side walls 51, 51 of the shoulder portion 11 extending in the depth direction have a curvature radius R of about 41 mm, for example. Moreover, the side walls 52 and 52 of the front and rear of the shoulder portion 11 extending in the width direction are curved so as to bulge outward from the bottle. For example, the curvature radius R thereof is about 65 mm. The corner portion between the side wall 51 and the side wall 52 is rounded (sometimes referred to as circular arc rounding, rounded corner rounding, or R rounding).

  The shoulder portion 11 is formed flat as a whole, like the trunk portion 12 and the bottom portion 13. However, the flatness ratio changes in the vertical direction of the shoulder 11. The flatness ratio in the shoulder 11 refers to the ratio of the length in the width direction to the length in the depth direction in the cross section. The shoulder portion 11 is bounded by a rib 21 between the shoulder portion 11 and the shoulder portion 11.

  The trunk portion 12 is located between the shoulder portion 11 and the bottom portion 13 and is formed to have left / right symmetry, front / rear contrast, and point symmetry about the central axis Y-Y. The body portion 12 includes two front and rear side walls 61 and 61 and two left and right side walls 62 and 62. The two side walls 61, 61 substantially extend in the width direction of the bottle 1. The two side walls 62, 62 substantially extend in the depth direction of the bottle 1 so that each of the two side walls 62, 62 is located between and connected to the two side walls 61, 61. Each corner 63 between the side wall 61 and the side wall 62 is rounded.

  A reduced pressure absorption panel 65 is formed on the two side walls 61, 61. Two decompression absorption panels 65 are formed on each side wall 61 so as to be positioned at the center of the upper and lower regions of each side wall 61 defined by the ribs 22. Each decompression absorption panel 65 has a circular shape, and is formed such that the central portion of the circular shape falls most into the bottle.

  Such a reduced pressure absorption panel 65 can absorb the decrease in the bottle internal pressure after filling the beverage, and can suppress the deformation of the bottle 1. In particular, since the reduced pressure absorption panel 65 is formed on the side wall 61 that is easily deformed due to the relatively large area, deformation of the bottle 1 can be suitably suppressed. In another embodiment, the reduced pressure absorption panel 65 may be formed on the side wall 62, or the shape of the reduced pressure absorption panel 65 may be appropriately designed such as an ellipse or a rectangle.

  As shown in FIG.4 and FIG.5, the cross-sectional shape of the trunk | drum 12 is a shape similar to the ellipse shape or the racetrack shape. The side wall 61 and the side wall 62 are curved so as to swell outward from the bottle, and the portions of the side wall 61 and the side wall 62 in the direction crossing the central axis Y-Y are most curved outward from the bottle. The curvature radii R of the side wall 61 and the side wall 62 are about 80 mm and about 100 mm, respectively. Thus, by making the side wall 61 and the side wall 62 into an arc shape, it becomes possible for the consumer to grip the body 12 so that the surface of the side wall 61 and the side wall 62 is along the palm, and the bottle 1 can be easily held. Can be made.

  Further, as shown in FIGS. 4 and 5, the corner portion 63 is rounded with a predetermined radius (R). The four corner portions 63, 63, 63, 63 in the cross section at a predetermined position of the body portion 12 are all formed on the same round surface. Thus, by rounding the corner portion 63, the fit between the palm of the consumer and the bottle 1 can be improved, and the bottle 1 can be more easily held. Further, since the distance between the two corner portions 63 and 63 facing each other with the central axis Y-Y interposed therebetween is shortened by the rounded chamfering, the strength of the body portion 12 can be increased.

  Further, as shown in FIGS. 4 and 5, it is preferable that the radius (R) of the corner portion 63 is variable above and below the trunk portion 12. In the present embodiment, as shown in FIG. 4, in the portion of the body portion 12 between the rib 21 and the rib 23, the corner portion 63 is rounded with R8 (8 mm radius). On the other hand, as shown in FIG. 5, in the portion of the body portion 12 below the rib 24, the corner portion 63 is rounded with R15 (radius of 15 mm). Further, in these intermediate portions, that is, in the portion of the body portion 12 between the rib 23 and the rib 24, the corner portion 63 is varied so as to gradually increase from R8 to R15. Due to the setting of these radii (R), the distance of the diagonal line connecting the two corners 63, 63 passing through the central axis Y-Y is lower (FIG. 5: 68) than the upper (FIG. 4: 70.69 mm). .69 mm) is shorter.

  Thus, it becomes useful from the viewpoint of moldability by changing the radius (R) of the corner portion 63 up and down. Specifically, when the bottle 1 is formed from the parison 30, the lower portion of the body portion 12 is farther from the mouth portion 2 than the upper portion thereof. As described above, since the radius (R) of round chamfering at a long distance is increased, the corner portion 63 at the lower portion of the body portion 12 can be easily rounded, and the formability can be improved as a whole.

  In addition, about the radius (R) of the corner part 63, not only said setting but the viewpoint of intensity | strength and a moldability should just be R5 or more. However, it is preferable that the radius (R) is such that the strength of the corner portion 63 does not decrease, for example, R20 or less. In another embodiment, the corner 63 may be chamfered, and in that case, it is preferably C5 or more and C20 or less.

  The trunk portion 12 has a flat cross-sectional shape as a whole. The flatness ratio of the body portion 12 of this embodiment, that is, the ratio (W / D) of the maximum width dimension (W) to the maximum depth dimension (D) is about 1.4 (≈67 mm / 48 mm) as described above. It has become. As for the trunk | drum 12, the flatness ratio W / D is substantially constant over the up-down direction. In addition, the minimum depth of the trunk | drum 12 is the distance between the two pressure-reduction absorption panels which oppose, for example, is 44 mm.

  In another embodiment, the maximum depth D may be 40 mm or more and 60 mm or less, preferably 45 mm or more and 51 mm or less, and more preferably around 48 mm. When the maximum depth D is less than 40 mm, it is difficult to grip the body portion 12 and the stability when the bottle 1 is placed vertically may be impaired. On the other hand, if the maximum depth D exceeds 60 mm, it cannot be said that the body 12 is substantially flat, and the ease of holding is impaired. If the maximum depth D exceeds 60 mm, for example, the area occupied by the bottle 1 in the consumer's bag increases, and the portability of the bottle 1 may be reduced.

  In another embodiment, the flatness ratio W / D may be 1.2 or more and 1.8 or less, preferably 1.3 or more and 1.6 or less, and more preferably around 1.4. When the flatness ratio W / D is less than 1.2, the body 12 has a cross section close to a square, and the body 12 cannot be said to be flat as a whole. Further, when the flatness ratio W / D exceeds 1.8, the body portion 12 becomes too flat, and the ease of gripping the body portion 12 and the stability of the bottle 1 on a desk or the like are liable to be impaired.

  Furthermore, from the viewpoint of the cross-sectional area of the body portion 12, it is preferable to satisfy the following relationship. That is, when the cross sectional area of the mouth portion 2 is A and the cross sectional area of the body portion 12 is S, the ratio S / A is preferably 4.0 or more and 13.0 or less. In the present embodiment, the ratio S / A is set to 6.6.

  The bottom portion 13 constitutes a bottom surface 71 that becomes the landing surface of the bottle 1. The bottom surface 71 is recessed upward in order to give the bottle 1 strength. As shown in FIG. 3, the bottom surface 71 of the bottom surface 71, an elliptical surface 71 a is a surface on which the bottle 1 is actually landed.

  As shown in FIG. 1, the bottom 13 has rounded chamfered ends 72, 72 in the width direction of the bottle 1. Further, as shown in FIG. 2, the bottom portion 13 has rounded chamfered end portions 73 and 73 in the depth direction of the bottle 1.

  Specifically, the bottom portion 13 includes a bottom surface 71 and substantially four wall portions 81, 81, 82, 82 that are perpendicular to the bottom surface 71. The two wall portions 81 and 81 are located at both ends in the width direction of the bottle 1 and extend in the depth direction. The two wall portions 82 and 82 are located at both ends in the depth direction of the bottle 1 and extend in the width direction. The two wall portions 82, 82 are connected to each other between the two wall portions 81, 81. And the edge part 72 is a site | part where the wall part 81 and the bottom face 13 cross, and is rounded by R8 (radius 8mm). Moreover, the edge part 73 is a site | part where the wall part 82 and the bottom face 13 cross, and is rounded by R4 (radius 4mm).

  Thus, since the end portions 72 and 73 of the bottom portion 13 are rounded, it is useful from the viewpoint of formability as described above. That is, when the bottle 1 is molded from the parison 30, the end portions 72 and 73 that are farthest from the mouth portion 2 are rounded, so that the moldability of the end portions 72 and 73 can be improved. In addition, the radius (R) of the round chamfer is different between the end 72 and the end 73, and the end 73 in the short diameter direction (depth direction) where the bottle 1 is likely to fall down is more preferable than the end 72. Round chamfering with a small value. Thereby, stability of the bottom part 13 at the time of landing can be improved and it can suppress that the bottle 1 falls down.

  In another embodiment, the major end 72 is preferably rounded at R6 or more, and a more preferred radius (R) is R8 described above. Moreover, it is preferable that the edge part 73 of a minor axis direction is rounded by R5 or less, and a more preferable radius (R) is said R4. Note that the above-described wall portions 81 and 81 can also be considered as the lower end portions of the side walls 62 and 62 of the body portion 12. Similarly, the wall portions 82 and 82 can be considered as the lower end portions of the side walls 61 and 61 of the trunk portion 12.

  The ribs 21, 22, 23, and 24 are formed so as to be recessed inward of the bottle over the circumferential direction of the main body 3. The ribs 21, 22, 23, and 24 function to give the flat main body 3 the necessary lateral rigidity. If this kind of concave rib is formed on the bottle 1 too much, the lateral rigidity becomes too large, which may adversely affect the above-described reduced pressure absorption effect. Therefore, in the present embodiment, ribs are formed in the main body 12 in a well-balanced manner, the rib 21 provides lateral rigidity at the upper end of the trunk 12, the rib 22 provides lateral rigidity in the middle of the trunk 12, 24, the lateral rigidity at the lower part of the body 12 is increased. In addition, the cross-sectional shape of each rib can be designed as appropriate, such as a semicircular arc or a trapezoidal shape in the longitudinal section.

  According to the bottle 1 of this embodiment demonstrated above, since it can be made into the substantially flat main-body part 12 and a consumer's muscle burden can be reduced, the grip ease can be improved. In particular, the rounded outer shape of the main body 12 as described above can favorably improve the ease of gripping by consumers.

  Moreover, since it is the small-sized flat bottle 1 which set the depth of the minor axis direction as mentioned above, the bottle 1 can be easily carried in a bag etc. and the portability can be improved. Therefore, it is possible to provide a practical bottle 1 that is suitable for the drinking habits of drinking while so-called drinking slowly and slowly. Moreover, since the thing of the cross-section of a perfect circle is used as the parison 30 of the bottle 1, productivity can be improved.

  In other embodiments, the cross-sectional shape of the body portion 12 may be another polygon such as a hexagon.

Second Embodiment
Next, with reference to FIG.7 and FIG.8, it demonstrates centering around difference about the plastic bottle 1 which concerns on 2nd Embodiment. The difference from the first embodiment is that a portion of the shoulder portion 11 that is in contact with the rib 21 has a straight wall 101 that extends in the central axis Y-Y direction. The straight wall 101 has a height of 3 mm, for example. The upper end of the straight wall 101 is connected to the curved wall 102 connected to the lower end of the mouth portion 2. The point which becomes useful compared with 1st Embodiment of this embodiment is that the intensity | strength of the shoulder part 11 can be raised.

It is a front view of the plastic bottle which concerns on 1st Embodiment. It is a side view of the plastic bottle which concerns on 1st Embodiment. It is a bottom view of the plastic bottle which concerns on 1st Embodiment. It is sectional drawing cut | disconnected by the IV-IV line | wire of FIG. It is sectional drawing cut | disconnected by the VV line | wire of FIG. It is a figure which shows the parison of the plastic bottle which concerns on embodiment, (A) Top view, (B) It is sectional drawing. It is a front view of the plastic bottle which concerns on 2nd Embodiment. It is a side view of the plastic bottle which concerns on 2nd Embodiment.

Explanation of symbols

  1: Bottle, 2: Mouth, 3: Body, 11: Shoulder, 12: Body, 13: Bottom, 21-24: Rib, 30: Parison, 61, 62: Sidewall, 63: Corner, 65 : Decompression absorption panel, 71: bottom, 72, 73: end, 81, 82: wall, YY: central axis

Claims (14)

A mouth that is a beverage outlet;
In a plastic bottle having a main body part that is connected to the mouth part and can store a drink inside,
When the width of the main body is W and the depth is D,
A plastic bottle satisfying 1.2 ≦ W / D ≦ 1.8 and 40 mm ≦ D ≦ 60 mm. A mouth that is a beverage outlet;
In a plastic bottle having a main body part that is connected to the mouth part and can store a drink inside,
The main body is formed flat as a whole,
The plastic bottle whose depth dimension which is the shorter width and depth of the main body is 40 mm or more and 60 mm or less. The bottom of the main body is rounded at both ends in the width direction and both ends in the depth direction,
The plastic bottle according to claim 1 or 2, wherein both end portions in the depth direction are rounded with a smaller radius than both end portions in the width direction. The main body is
Two first side walls extending substantially in the width direction;
4. Two second side walls, each extending between the two first side walls and extending substantially in the depth direction so as to connect the two first side walls. The plastic bottle according to item.   The plastic bottle according to claim 4, wherein at least one of the first side wall and the second side wall is curved outward of the bottle.   The plastic bottle according to claim 4 or 5, wherein a corner portion between the first side wall and the second side wall is chamfered or rounded.   The plastic bottle according to claim 6, wherein the corner portion is chamfered or rounded with a larger value in a lower portion than in an upper portion of the main body portion.   The plastic bottle according to claim 6 or 7, wherein a distance between two corner portions at diagonal positions is formed so that a lower portion is shorter than an upper portion of the main body portion.   The plastic bottle according to any one of claims 1 to 8, wherein the main body has a vacuum absorbing panel on at least two side walls.   The plastic bottle according to claim 9, wherein the at least two side walls are side walls substantially extending in a width direction of the main body portion.   The plastic bottle according to any one of claims 1 to 10, wherein a concave rib is formed in the main body portion in a circumferential direction.   The plastic according to any one of claims 1 to 11, wherein 4.0 ≦ S / A ≦ 13.0, where A is a cross-sectional area of the mouth portion and S is a cross-sectional area of the main body portion. Bottle.   The plastic bottle according to any one of claims 1 to 12, wherein the bottle capacity is 300 to 800 ml, or the bottle height is 140 to 220 mm.   The plastic bottle according to any one of claims 1 to 13, wherein the plastic bottle is molded by a stretch molding method by a cold parison method using a parison whose cross section is a perfect circle.

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