JP5579376B2 - Plastic bottle - Google Patents

Description

  The present invention relates to a plastic bottle having a bottom portion, a trunk portion, a mouth portion, and a shoulder portion provided between the mouth portion and the trunk portion, and in particular, a plastic excellent in both buckling strength and side wall strength. Regarding bottles.

  Conventionally, a plastic bottle 101 having a shape as shown in FIG. 10 is known. The plastic bottle 101 has a mouth portion, a shoulder portion that gradually increases in diameter from the upper side to the lower side, a trunk portion that continues to the shoulder portion, and a bottom portion that continues to the trunk portion. Among these, the trunk | drum has the some annular groove 102 each formed over the perimeter. The body portion is provided with a plurality of decompression panels 103 at predetermined intervals in the circumferential direction.

In recent years, there has been a demand for reducing the weight of plastic bottles by reducing the plastic materials used for such plastic bottles.
JP 2006-327638 A

  However, when trying to reduce the weight of the plastic bottle, the thickness of each part of the plastic bottle is inevitably reduced, so that the strength of the plastic bottle is deteriorated. Specifically, the following problems occur.

  In general, a plurality of plastic bottles filled with the content liquid are collectively stored in a cardboard box, and the cardboard boxes are stacked and stored in a warehouse. At this time, a load is applied to the plastic bottle downward in the vertical direction. However, when the thickness of the plastic bottle is reduced in order to reduce the weight as described above, the strength of the plastic bottle against the load in the vertical direction (hereinafter also referred to as buckling strength) becomes weak.

  In the plastic bottle 101 of the conventional shape shown in FIG. 10, when a load in the vertical direction is applied, stress tends to concentrate on the annular groove 102, and the plastic bottle is broken (buckled) from the annular groove 102. There are many. When plastic bottles with low buckling strength are stored in this way, for example, measures such as reducing the number of stacked cardboard boxes containing plastic bottles are required, resulting in poor storage efficiency.

  As another problem, when a product bottle in which a plastic bottle is filled with the content liquid is sold by a vending machine, a lateral load is applied to the plastic bottle. If the strength of the plastic bottle against the lateral load (hereinafter also referred to as side wall strength) is weak, the plastic bottle is crushed and deformed in the vending machine. In this case, the plastic bottle may be clogged in the vending machine.

  In contrast, the conventional plastic bottle 101 shown in FIG. 10 is provided with a plurality of annular grooves 102 so as to increase the side wall strength and withstand lateral loads. However, as described above, the buckling strength of the plastic bottle 101 is rather weakened by the annular groove 102. Thus, it is difficult to achieve both the increase in the buckling strength of the plastic bottle 101 and the increase in the side wall strength of the plastic bottle 101.

  The present invention has been made in consideration of such points, and even when the wall thickness is reduced in order to reduce the weight, a plastic bottle that can increase both the buckling strength and the side wall strength is provided. The purpose is to provide.

The present invention relates to a plastic bottle, comprising a bottom, a cylindrical body, a mouth, and a shoulder provided between the mouth and the body, and extending in the longitudinal direction around the entire periphery of the body. Each of the recess rows includes a plurality of hexagonal recesses arranged continuously in the vertical direction, and the hexagonal recesses included in one recess row are formed into hexagonal recesses included in the adjacent recess rows. The hexagonal recesses are alternately arranged, each hexagonal recess has a regular hexagonal bottom surface and six side walls surrounding the bottom surface, and the hexagonal recesses are spaced apart from each other. Between the recesses, ridges that are linear and have a predetermined width are formed, and hexagonal recesses and ridges with a predetermined width are arranged in any vertical cross section of the trunk, that the ridges having a hexagonal recess and a predetermined width is disposed also in the horizontal cross section A plastic bottle which is characterized.

  The present invention is the plastic bottle characterized in that the inclination angle of the outer edge of the shoulder is 20 ° to 40 ° with respect to the axis of the bottle.

  The present invention is the plastic bottle characterized in that the bottom surface of each hexagonal concave portion has a curved shape protruding outward from the bottle center side.

  The present invention is the plastic bottle characterized in that the bottom surface of each hexagonal recess has a flat surface shape.

  The present invention is the plastic bottle characterized in that a convex portion protruding outward from the bottle center side is formed on the bottom surface of each hexagonal concave portion.

  The present invention is the plastic bottle characterized in that the regular hexagon that forms the bottom surface of each hexagonal recess has a diagonal line that faces in a direction perpendicular to the axis of the bottle.

  The present invention is the plastic bottle characterized in that the regular hexagon that forms the bottom surface of each hexagonal recess has a diagonal line that faces in a direction parallel to the axis of the bottle.

The present invention relates to a plastic bottle, comprising a bottom, a cylindrical body, a mouth, and a shoulder provided between the mouth and the body, and extending in the longitudinal direction around the entire periphery of the body. The convex row is formed, each convex row includes a plurality of hexagonal convex portions arranged continuously in the vertical direction, and the hexagonal convex portion included in a certain convex portion row is adjacent to the adjacent convex portion row. The hexagonal convex portions are alternately arranged, each hexagonal convex portion has a regular hexagonal surface and six side walls surrounding the surface, and the hexagonal convex portions are separated from each other. Between each hexagonal convex portion, a concave line having a predetermined width is formed between each hexagonal convex portion, and the hexagonal convex portion and the predetermined width are formed in any vertical cross section of the body portion. and concave stripes are arranged, especially that the concave having a hexagonal-shaped convex portion and the predetermined width is located in any horizontal cross section of the trunk portion A plastic bottle to be.

  As described above, according to the present invention, a plurality of recess rows extending in the vertical direction are formed on the entire circumference of the trunk portion, and each recess row includes a plurality of hexagonal recesses arranged continuously in the vertical direction. The hexagonal recesses included in the rows are alternately arranged with respect to the hexagonal recesses included in the adjacent recess rows. Alternatively, a plurality of convex portion rows extending in the vertical direction are formed on the entire circumference of the trunk portion, and each convex portion row includes a plurality of hexagonal convex portions arranged continuously in the vertical direction, and is included in a certain convex portion row. The hexagonal convex portions are alternately arranged with respect to the hexagonal convex portions included in the adjacent convex portion rows. In other words, any vertical or horizontal cross section of the body portion is not provided with a concave portion or a convex portion in the entire vertical direction or the entire horizontal direction. Therefore, when a load is applied from the vertical direction and the horizontal direction of the plastic bottle, Stress does not concentrate at the location, and destruction does not propagate. Thereby, both the buckling strength and the side wall strength of the plastic bottle can be improved.

  According to the present invention, the inclination angle of the outer edge of the shoulder is 20 ° to 40 ° with respect to the axis of the bottle, so that the buckling strength of the plastic bottle can be further improved.

First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing a plastic bottle according to the present embodiment, and FIG. 2 is a top view (viewed in the direction of arrow II in FIG. 1) showing the plastic bottle according to the present embodiment. FIG. 3 is an enlarged front view showing the hexagonal recess of the plastic bottle according to the present embodiment, and FIG. 4 is a vertical sectional view showing the hexagonal recess of the plastic bottle according to the present embodiment (IV-IV in FIG. 3). FIG. FIG. 5 is a horizontal sectional view (cross-sectional view taken along the line V-V in FIG. 3) showing the hexagonal concave portion of the plastic bottle according to the present embodiment, and FIG. 6 is a diagram of the hexagonal concave portion of the plastic bottle according to the present embodiment. It is a horizontal sectional view showing Modification 1. FIG. 7 is an enlarged front view showing a second modification of the hexagonal concave portion of the plastic bottle according to the present embodiment, and FIG. 8 is a horizontal cross section showing a second modification of the hexagonal concave portion of the plastic bottle according to the present embodiment. FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

  First, the outline of the plastic bottle according to the present embodiment will be described with reference to FIGS.

  The plastic bottle 10 shown in FIGS. 1 and 2 is produced by biaxially stretching blow-molding a preform made of, for example, PET (polyethylene terephthalate). The plastic bottle 10 is provided between a bottom portion 13, a trunk portion 12 continuous with the bottom portion 13, a mouth portion 11 provided with a screw portion 16 on the outer periphery, and the mouth portion 11 and the trunk portion 12. A shoulder portion 14 whose diameter gradually increases from the 11 side to the body 12 side. An annular flange portion 17 is provided below the screw portion 16 in the mouth portion 11.

  In FIG. 1, the shoulder portion 14 has a shoulder shape. That is, the inclination angle θ of the outer edge of the shoulder 14 is relatively small. In FIG. 1, the inclination angle θ is 30 ° with respect to the axis Z of the bottle extending in the vertical direction.

  The inclination angle θ of the outer edge of the shoulder 14 is preferably 20 ° to 40 °. By setting the inclination angle θ of the outer edge of the shoulder 14 to 40 ° or less, the load applied to the plastic bottle 10 can be released downward along the shoulder 14, so that the deformation of the shoulder 14 is prevented and the plastic The buckling strength of the bottle 10 is increased. On the other hand, when the inclination angle θ of the outer edge of the shoulder portion 14 is 20 ° or less, the capacity of the plastic bottle 10 is reduced, which is not preferable.

  A shoulder upper end 14 a is formed at a connection portion between the shoulder 14 and the mouth 11 in the shoulder 14. That is, the shoulder upper end 14a is a position where the diameter of the shoulder 14 gradually increases from there downward. The inclination angle θ of the outer edge of the shoulder portion 14 described above is defined as an angle formed by the tangent L of the shoulder portion 14 at the shoulder upper end 14a and the axis Z of the bottle described above.

  Incidentally, as shown in FIG. 1, a large number of hexagonal recesses 15 are densely formed over the entire circumference of the body portion 12. Between each of these hexagonal recessed parts 15, the protruding item | line 20 is formed, respectively.

That is, as shown in FIG. 1, a plurality of recess rows R _{1 to} R ₅ extending in the vertical direction are formed on the entire circumference of the body portion 12, and each of the recess rows R _{1 to} R ₅ is continuously arranged in the vertical direction. The hexagonal recess 15 is included. That is, each of the recess rows R _{1 to} R ₅ has four hexagonal recesses 15 (recess rows R ₁ , R ₃ , R ₅ ) or three hexagonal recesses 15 (recess rows) arranged continuously in the vertical direction. R ₂ , R ₄ ). Of these, in the recess rows R ₂ and R ₄ having three hexagonal recesses 15, trapezoidal recesses 18 are respectively provided above and below the three hexagonal recesses 15 arranged continuously in the vertical direction. ing.

Further, as shown in FIG. 1, hexagonal recess 15 included in a certain concave portion rows R ₁ to R ₅ are both staggered with respect to hexagonal recess 15 included in concave portion rows R ₁ to R ₅ adjacent ing. For example, four hexagonal recesses 15 included in the recess row R ₃ and three hexagonal recesses 15 included in the recess row R ₂ are alternately arranged. Similarly, four hexagonal recesses 15 included in the recess row R ₃ and three hexagonal recesses 15 included in the recess row R ₄ are alternately arranged.

In FIG. 1, five rows of recesses R _{1 to} R ₅ are shown. Actually, however, eight rows of recesses are arranged in the same manner as the above-described recess rows R _{1 to} R _5. Is provided.

  Next, the configuration of each hexagonal recess 15 will be described with reference to FIGS.

As shown in FIG. 3, each hexagonal recess 15 has a regular hexagonal bottom surface 15a, and six side walls _15b 1 _{~15b 6} surrounding the bottom surface 15a. Of these, the bottom surface 15 a has a curved shape protruding outward from the center side of the plastic bottle 10. That is, the bottom surface 15a has a linear vertical section (longitudinal section) (see FIG. 4) and an arc-shaped horizontal section (lateral section) (see FIG. 5).

Also, regular hexagon which constitutes the bottom surface of each hexagonal recess 15 has a diagonal d ₁ facing the direction orthogonal to the axis Z of the bottle (see Figure 1). Of the regular hexagonal diagonal lines, the other two diagonal lines form an angle of 30 ° or 150 ° with respect to the axis Z of the bottle, respectively.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, a preform made of PET (polyethylene terephthalate) is biaxially stretch blow molded to produce a plastic bottle 10 shown in FIG. Next, the plastic bottle 10 is filled with the content liquid, and then the mouth portion 11 of the plastic bottle 10 is sealed with a cap (not shown).

  Next, it is assumed that a vertical load is applied to the plastic bottle 10 shown in FIG. Examples of such a situation include a case where a plurality of plastic bottles 10 are accommodated in cardboard boxes and the cardboard boxes are stacked on each other.

  In this case, the vertical load on the plastic bottle 10 is transmitted from the mouth portion 11 to the shoulder portion 14. In the present embodiment, as described above, the inclination angle θ of the outer edge of the shoulder portion 14 is 20 ° to 40 °, which is smaller than the conventional plastic bottle. Accordingly, stress due to the load in the vertical direction is not concentrated on the shoulder portion 14, and the load in the vertical direction can be released downward along the shoulder portion 14. Therefore, the deformation of the shoulder portion 14 is prevented, and the buckling strength of the plastic bottle 10 can be increased.

Next, the vertical load on the plastic bottle 10 is transmitted to the body 12. As described above, are formed dense hexagonal recess 15 in the body portion 12, hexagonal recess 15 included in a certain concave portion rows R ₁ to R ₅ are hexagonal contained in concave portion rows R ₁ to R ₅ adjacent The recesses 15 are alternately arranged. That is, no matter where the horizontal section of the body portion 12 is taken, there is no portion that becomes a concave portion over the entire circumference or a portion that becomes a convex portion over the entire circumference, and the concave portion and the convex portion are arranged in any horizontal cross section of the body portion 12. ing. Therefore, when a vertical load is applied to the body 12, stress is not concentrated on a specific portion of the body 12. Thereby, the buckling strength of the plastic bottle 10 is increased, and the deformation of the body portion 12 is prevented.

  Next, it is assumed that a horizontal load is applied from the side to the plastic bottle 10 shown in FIG. As such a situation, for example, a case where a large number of plastic bottles 10 are accommodated in a vending machine can be cited.

In this case, the horizontal load on the plastic bottle 10 is mainly applied to the body 12. In the present embodiment, as described above, the hexagonal concave portions 15 are densely formed in the body portion 12, and the hexagonal concave portions 15 included in a certain concave portion row R _{1 to} R ₅ are adjacent concave portion rows R _{1 to} R. _The hexagonal recesses 15 included in ₅ are arranged alternately. That is, no matter which vertical cross section of the body portion 12 is taken, there is no portion that becomes a concave portion over the entire vertical direction, or there is a portion that becomes a convex portion over the entire vertical direction. Has been placed. Therefore, when a horizontal load is applied to the trunk portion 12, stress is not concentrated on a specific portion of the trunk portion 12. Thereby, the side wall strength of the plastic bottle 10 is increased, and the deformation of the body portion 12 is prevented.

(Modification 1)
Next, a first modification of the hexagonal recess will be described with reference to FIG. FIG. 6 is a horizontal sectional view (a diagram corresponding to FIG. 5 described above) showing the hexagonal recess 15 according to the first modification of the present embodiment. The first modification shown in FIG. 6 is different in the shape of the bottom surface 15a of each hexagonal recess 15, and the other configuration is the same as the configuration shown in FIGS.

  In FIG. 6, the bottom surface 15 a of each hexagonal recess 15 has a flat surface shape. That is, the bottom surface 15a has a straight vertical cross section (longitudinal cross section) (similar to FIG. 4 described above) and a straight horizontal cross section (transverse cross section) (see FIG. 6).

  Even in this case, the same effect as the embodiment shown in FIGS. 1 to 5 can be obtained.

(Modification 2)
Next, a second modification of the hexagonal recess will be described with reference to FIGS. FIG. 7 is an enlarged front view (a diagram corresponding to FIG. 3 described above) showing a hexagonal recess 15 according to the second modification of the present embodiment, and FIG. 8 is a hexagon according to the second modification of the present embodiment. It is a horizontal sectional view (figure corresponding to Drawing 5 mentioned above) showing a crevice. The modified example 2 shown in FIGS. 7 to 8 is different in that a convex portion 19 is formed on the bottom surface 15a of each hexagonal concave portion 15, and other configurations are the configurations shown in FIGS. Is the same.

  7 to 8, the bottom surface 15 a of each hexagonal concave portion 15 is formed with a convex portion 19 that protrudes outward from the bottle center side and has a circular shape when viewed from the front side.

  Even in this case, the same effect as the embodiment shown in FIGS. 1 to 5 can be obtained. Further, in FIGS. 7 to 8, since the convex portion 19 is easy to move in the direction perpendicular to the axis Z of the bottle, each hexagonal concave portion 15 has an excellent decompression absorption function.

As described above, according to the present embodiment, the plurality of recess rows R _{1 to} R ₅ extending in the vertical direction are formed on the entire circumference of the body portion 12, and the respective recess rows R _{1 to} R ₅ are continuously arranged in the vertical direction. The hexagonal recesses 15 included in the recess rows R _{1 to} R ₅ are alternately arranged with respect to the hexagonal recesses 15 included in the adjacent recess rows R _{1 to} R _5. Has been. That is, any vertical cross section or horizontal cross section of the body portion 12 is not provided with a concave portion or a convex portion in the whole vertical direction or the whole horizontal direction, so when a load is applied from the vertical direction and the horizontal direction of the plastic bottle 10, The stress is not concentrated on a specific portion of the body portion 12, and the destruction does not propagate. Thereby, both the buckling strength and the side wall strength of the plastic bottle 10 can be improved.

  Further, according to the present embodiment, the inclination angle θ of the outer edge of the shoulder portion 14 is 20 ° to 40 ° with respect to the axis Z of the bottle, so that the buckling strength of the plastic bottle 10 can be further improved. it can.

  Furthermore, according to the present embodiment, the hexagonal recess 15 can be provided with a reduced pressure absorption function. That is, after the plastic bottle 10 is filled with the content liquid and closed, the plastic bottle 10 is cooled, or when the content liquid absorbs oxygen in the plastic bottle 10, the inside of the closed plastic bottle 10 is decompressed. Is done. At this time, the hexagonal recess 15 is deformed inward of the plastic bottle 10, whereby the reduced pressure in the plastic bottle 10 can be absorbed.

(Example)
Next, specific examples of the present invention will be described.
Using a PET preform having an overall weight of 18 g, a plastic bottle 10 (this example) shown in FIG. 1 and a plastic bottle 101 (comparative example) shown in FIG. 10 were each produced by a biaxial stretch blow molding method.

  The maximum diameters of the plastic bottle 10 and the plastic bottle 101 were both 68 mm, and the total height was 207 mm.

  Next, each of the plastic bottles 10 and 101 was filled with the content liquid (water). In this case, a space of 20 ml was left above the liquid contents in the plastic bottles 10 and 101, respectively. Next, caps were fitted to the mouths of the plastic bottles 10 and 101 and closed. Thereafter, the buckling strength and the side wall strength of each of the plastic bottles 10 and 101 were measured.

  Regarding the measurement of buckling strength, a load is applied to each plastic bottle 10, 101 in the vertical direction (longitudinal direction), and the load when each plastic bottle 10, 101 breaks, and each plastic bottle 10, 101 at that time. The amount of deformation in the vertical direction was obtained.

Regarding the measurement of the side wall strength, a constant load (58.8 N) is applied to each plastic bottle 10, 101 in the horizontal direction (lateral direction), and the amount of horizontal deformation of each plastic bottle 10, 101 at that time is determined. Asked.

  Thus, the result that the plastic bottle 10 by a present Example was high in both the buckling strength and the side wall strength compared with the plastic bottle 101 by a comparative example was obtained.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 9 is a front view showing a plastic bottle according to the present embodiment. The second embodiment shown in FIG. 9 is different in the direction of each hexagonal recess 15, and the other configuration is substantially the same as the first embodiment described above. 9, the same parts as those of the first embodiment shown in FIGS. 1 to 8 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 9, a large number of hexagonal recesses 15 are densely formed over the entire circumference of the body portion 12. Between each of these hexagonal recessed parts 15, the protruding item | line 20 is formed, respectively.

Further, a plurality of recess rows R _{1 to} R ₅ extending in the vertical direction are formed on the entire circumference of the body portion 12, and each of the recess rows R _{1 to} R ₅ includes a plurality of hexagonal recesses 15 arranged continuously in the vertical direction. It is out. Furthermore, the hexagonal recessed parts 15 included in a certain recessed part row R _{1 to} R ₅ are alternately arranged with respect to the hexagonal recessed parts 15 included in the adjacent recessed part rows R _{1 to} R ₅ .

In this embodiment, a regular hexagon which constitutes the bottom surface 15a of each hexagonal recess 15 has a diagonal d ₂ facing the direction parallel to the axis Z of the bottle (see FIG. 9). Of the regular hexagonal diagonal lines, the other two diagonal lines form an angle of 60 ° or 120 ° with respect to the axis Z of the bottle.

  Also in the present embodiment, both the buckling strength and the side wall strength of the plastic bottle 10 can be improved as in the first embodiment shown in FIGS.

  In each embodiment described above, a hexagonal convex portion protruding outward from the body portion 12 may be used instead of the hexagonal concave portion 15. In this case, a plurality of convex portion rows extending in the vertical direction are formed on the entire circumference of the body portion 12 of the plastic bottle 10, and each convex portion row includes a plurality of hexagonal convex portions arranged continuously in the vertical direction. Moreover, the hexagonal convex part contained in a certain convex part row | line | column is alternately arrange | positioned with respect to the hexagonal convex part contained in an adjacent convex part row | line | column. Furthermore, a concave line is formed between each hexagonal convex part.

The front view which shows the plastic bottle by the 1st Embodiment of this invention. The top view which shows the plastic bottle by the 1st Embodiment of this invention. The enlarged front view which shows the hexagonal recessed part of the plastic bottle by the 1st Embodiment of this invention. The vertical sectional view showing the hexagonal crevice of the plastic bottle by a 1st embodiment of the present invention. The horizontal sectional view which shows the hexagonal recessed part of the plastic bottle by this Embodiment. The horizontal sectional view which shows the modification 1 of the hexagonal recessed part of the plastic bottle by this Embodiment. The enlarged front view which shows the modification 2 of the hexagonal recessed part of the plastic bottle by this Embodiment. The horizontal sectional view which shows the modification 2 of the hexagonal recessed part of the plastic bottle by this Embodiment. The front view which shows the plastic bottle by the 2nd Embodiment of this invention. The front view which shows the conventional common plastic bottle.

Explanation of symbols

10 Plastic bottles 11 neck portion 12 the body portion 13 bottom portion 14 shoulder portion 15 hexagonal recess 15a bottom surface _15b 1 _{~15b 6} sidewalls 19 projecting portion 20 projections R ₁ to R ₅ concave portion rows

Claims (8)

In plastic bottles,
A bottom, a cylindrical trunk, a mouth, and a shoulder provided between the mouth and the trunk;
A plurality of recess rows extending in the longitudinal direction are formed on the entire circumference of the trunk portion, each recess row including a plurality of hexagonal recesses arranged continuously in the longitudinal direction,
The hexagonal recesses included in a certain recess row are alternately arranged with respect to the hexagonal recesses included in the adjacent recess row,
Each hexagonal recess has a regular hexagonal bottom surface and six side walls surrounding the bottom surface,
The hexagonal recesses are spaced apart from each other, and between each hexagonal recess, a ridge having a predetermined width and a linear shape is formed.
In any vertical section of the body portion is disposed and ridges with hexagonal recess and a predetermined width, that the ridges with the hexagonal recess and a predetermined width is disposed at any horizontal cross section of the trunk portion Features plastic bottle.   The plastic bottle according to claim 1, wherein an inclination angle of the outer edge of the shoulder is 20 ° to 40 ° with respect to the axis of the bottle.   2. The plastic bottle according to claim 1, wherein the bottom surface of each hexagonal recess has a curved shape protruding outward from the bottle center side.   2. The plastic bottle according to claim 1, wherein the bottom surface of each hexagonal recess has a flat surface shape.   2. The plastic bottle according to claim 1, wherein a convex portion protruding outward from the bottle center side is formed on a bottom surface of each hexagonal concave portion.   The plastic bottle according to claim 1, wherein the regular hexagon forming the bottom surface of each hexagonal recess has a diagonal line oriented in a direction orthogonal to the axis of the bottle.   2. The plastic bottle according to claim 1, wherein the regular hexagon forming the bottom surface of each hexagonal recess has a diagonal line oriented in a direction parallel to the axis of the bottle. In plastic bottles,
A bottom, a cylindrical trunk, a mouth, and a shoulder provided between the mouth and the trunk;
A plurality of convex part rows extending in the vertical direction are formed on the entire circumference of the trunk part, and each convex part row includes a plurality of hexagonal convex parts arranged continuously in the vertical direction,
The hexagonal convex portions included in a certain convex portion row are alternately arranged with respect to the hexagonal convex portions included in the adjacent convex portion row,
Each hexagonal convex portion has a regular hexagonal surface and six side walls surrounding the surface,
Each hexagonal convex part is arranged spaced apart from each other, and between each hexagonal convex part, a concave line having a predetermined width and a linear shape is formed.
In any vertical section of the body portion is disposed and concave with hexagonal shaped convex portion and the predetermined width is disposed and concave stripes at any horizontal cross section of the trunk portion with a hexagonal-shaped convex portion and the predetermined width A plastic bottle characterized by

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