JP2018150075A - Plastic bottle and filling body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic bottle and a filling material which have high designability and can suppress deformation due to an external load and deformation due to a change in internal pressure. SOLUTION: The body portion 30 has at least a mouth portion 10, a body portion 30, and a bottom portion 50, and the body portion 30 has a convex portion 31 forming an outer peripheral surface of a PET bottle 1 and a convex portion 31 toward the inside in the radial direction. It has a recessed recess 32, the recess 32 is curved outward in the radial direction, and the convex portion 31 is composed of a plurality of columnar portions 35, and is a first portion oblique to the axial direction and the circumferential direction. The columnar portion 35a and the second columnar portion 35b intersect. [Selection diagram] Fig. 1

Description

  The present invention relates to a plastic bottle and a filling body, and more particularly to a plastic bottle having a shape characteristic and a filling body.

  As containers filled with beverages, plastic bottles, especially PET (PolyEthylene Terephthalate) bottles are often used. The application range of PET bottles is expanding.

  Patent Document 1 includes a container body that has an opening for taking out wine and can store 500 ml of wine inside, and a lid that is detachably attached to the opening and seals the container body. A cylindrical body having a bottom, which is made of PET, connected to the upper end of the body and shrinking upward, and a cylindrical neck connected to the upper end of the shoulder and extending upward A wine bottle is disclosed that includes a mouth portion that is continuous from the upper end of the neck portion, has an opening for wine removal at the upper end, and has a male screw portion formed on the outer peripheral surface.

JP 2013-159352 A

  According to Patent Document 1, it is said that a wine bottle can be reduced in weight and transport cost can be reduced, a consumer's willingness to purchase can be improved, and a wine bottle that is light and difficult to break can be provided. . However, Patent Document 1 does not mention any deformation of the wine bottle caused by various causes. On the other hand, if it is designed so that the deformation of the container can be suppressed, its design is likely to be sacrificed.

  Accordingly, an object of the present invention is to provide a plastic bottle and a filling body that have high design properties and are capable of suppressing deformation due to an external load and deformation due to a change in internal pressure.

  In order to solve the above problems, the present invention provides a plastic bottle having at least a mouth portion, a body portion, and a bottom portion, wherein the body portion includes a convex portion constituting an outer peripheral surface of the plastic bottle, and a radial direction from the convex portion. And the concave portion is curved toward the outer side in the radial direction, and the convex portion includes a plurality of columnar portions, and is inclined with respect to the axial direction and the circumferential direction. The first columnar part and the second columnar part intersect each other.

  Further, the plurality of columnar portions are in an oblique lattice shape.

  Each of the plurality of columnar portions extends between both ends in the axial direction in the body portion, and further extends from one end of the second columnar portion and does not intersect the first columnar portion. And a fourth columnar portion that extends from one end of the first columnar portion and intersects the third columnar portion without intersecting with the second columnar portion.

  Furthermore, the concave portion includes an isosceles triangular pressure absorption auxiliary portion surrounded by the first columnar portion, the second columnar portion, and the axial end portion of the trunk portion. And

  Furthermore, the plastic bottle has connecting portions having the same diameter as the convex portions on both outer sides in the axial direction from the barrel portion, and the diameter is between the convex portions and the connecting portions. It is characterized by having a gap portion recessed inward in the direction.

  Furthermore, the columnar part has a groove extending between both ends in the axial direction.

  Further, the plurality of columnar parts are configured to be 4 or more and 16 or less.

  Furthermore, the plastic bottle further includes a crane neck-shaped neck portion between the mouth portion and the trunk portion.

  Furthermore, the filling body of the present invention includes the above-described plastic bottle, the liquid to be filled, and the lid, and the plastic bottle has heat resistance against the high-temperature liquid to be filled, and the high-temperature liquid The temperature of the liquid is 55 ° C. or higher and lower than 90 ° C.

  Furthermore, the filling body of the present invention includes the plastic bottle, the liquid to be filled, and the lid, and the temperature of the liquid filled in the plastic bottle is 15 ° C. or more and 40 ° C. or less at the time of filling. Yes, it is characterized by being 50 ° C. or higher and 85 ° C. or lower in the warmed state.

  Furthermore, the absolute value of the pressure change amount of the filler is 1 kPa or more and 40 kPa or less.

  According to the present invention, in the plastic bottle having at least a mouth portion, a body portion, and a bottom portion, the body portion includes a convex portion constituting the outer peripheral surface of the plastic bottle, and a concave portion recessed from the convex portion toward the inside in the radial direction. The concave portion is curved toward the outer side in the radial direction, and the convex portion is composed of a plurality of columnar portions, and the first columnar portion and the second columnar shape are inclined with respect to the axial direction and the circumferential direction. Since the portion intersects, deformation due to an external load and deformation due to a change in internal pressure can be suppressed while having high design properties.

  Furthermore, according to the configuration in which the plurality of columnar portions are in an oblique lattice shape, deformation due to a load from the outside and deformation due to a change in internal pressure can be suppressed while having high design properties.

  Each of the plurality of columnar portions extends between the axial ends of the body portion, and further extends from one end of the second columnar portion and does not intersect the first columnar portion, and the first columnar portion, According to the configuration including the fourth columnar portion that extends from one end of the columnar portion and intersects the third columnar portion without intersecting the second columnar portion, while having high design properties, the outside The deformation due to the load and the deformation due to the change in the internal pressure can be suppressed.

  Further, according to the configuration in which the concave portion includes an isosceles triangular pressure absorption auxiliary portion surrounded by the first columnar portion, the second columnar portion, and the axial end portion of the trunk portion, the internal pressure Deformation due to the change of is further suppressed.

  Furthermore, the plastic bottle has connecting portions having the same diameter as the convex portions on both outer sides in the axial direction from the body portion, and is indented inward in the radial direction between the convex portions and the connecting portions. According to the configuration having the gap portion, deformation due to an external load is further suppressed.

  Furthermore, according to the structure which has a groove | channel extended between the both ends of an axial direction, a columnar part can suppress the deformation | transformation by the load from the outside and the deformation | transformation by the change of an internal pressure more.

  Furthermore, when the plurality of columnar portions are configured to be 4 or more and 16 or less, deformation due to an external load and deformation due to a change in internal pressure are further suppressed.

  According to the configuration in which the plastic bottle further has a crane neck-shaped neck portion between the mouth portion and the trunk portion, the oxidation of the contents is suppressed and the change in the internal pressure is further suppressed.

  Furthermore, the present invention is constituted by the plastic bottle described above, a liquid to be filled, and a lid, and the plastic bottle has heat resistance to the high temperature liquid to be filled, and the temperature of the high temperature liquid is 55 ° C. As mentioned above, since it is less than 90 degreeC, it can respond to high temperature filling.

  Furthermore, the present invention is composed of the plastic bottle described above, the liquid to be filled, and the lid, and the temperature of the liquid filled in the plastic bottle is 15 ° C. or more and 40 ° C. or less at the time of filling. Since it is 50 ° C. or more and 85 ° C. or less in the state, it can be applied to warm sales.

  Furthermore, since the absolute value of the pressure change amount of the filler is not less than 1 kPa and not more than 40 kPa, deformation due to a change in internal pressure can be suppressed.

It is the front view by which the PET bottle as an example of the plastic bottle which concerns on this embodiment was shown. It is a top view of a PET bottle. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is a bottom view of a PET bottle. It is a front view of the PET bottle of Comparative Example 1. It is a front view of the PET bottle of Comparative Example 2.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the configuration of the plastic bottle according to the present embodiment will be described in detail. The plastic bottle according to the present embodiment is a blow-molded container that is processed by blow molding from a preform (preliminary molded body) that is a prototype. FIG. 1 is a front view showing a PET bottle 1 as an example of a plastic bottle according to the present embodiment, and FIG. 2 is a top view of the PET bottle 1. In the following, for convenience of explanation, the mouth portion 10 in which the contents are taken in and out in the state of FIG. The PET bottle 1 has at least a mouth part 10, a body part 30, and a bottom part 50. The length of the PET bottle 1 in the axial direction is, for example, 191 mm.

  The upper end of the substantially cylindrical mouth portion 10 is annular in plan view, and the inner peripheral side is an opening 11 (see FIG. 2). The opening 11 serves as a filling port and a spout for the contents. On the other hand, the mouth part 10 has an annular support ring 12 projecting toward the outside in the radial direction of the PET bottle 1 at the lower end thereof. The support ring 12 is used for support when the PET bottle 1 is blow-molded or conveyed. The axial length of the mouth 10 is set to 21.01 mm, for example.

  The mouth portion 10 has a male screw 13 on the outer periphery thereof for attaching a lid (not shown). The PET bottle 1 is sealed by attaching a lid to the mouth portion 10. The PET bottle 1 may be of any configuration that can be sealed. For example, when a stopper-type lid is used, a protrusion or groove may be formed on the outer periphery or inner periphery of the mouth portion 10 instead of the male screw 13. It ’s fine.

  Between the support ring 12 and the external thread 13, an annular cover 14 that protrudes radially outward from the outer periphery of the mouth portion 10 may be formed. When the PET bottle 1 is transported, a gripper provided in transport equipment (not shown) can grip the PET bottle 1 with the concave groove between the turnip 14 and the support ring 12 interposed therebetween. The support ring 12 protrudes to the outer side in the radial direction than the turnip 14.

  There are no particular limitations on the shape and dimensions of the mouth 10. However, the mouth portion 10 may be versatile if it has dimensions corresponding to, for example, the PCO (Plastic Closure Only) 1810 standard or the PCO 1881 standard.

  The mouth portion 10 may be crystallized until it is colored white by heating in a so-called crystallization apparatus so as to have heat resistance necessary for filling the contents at high temperature. If the mouth 10 is non-crystalline, it can be filled with a temperature lower than the glass transition point (Tg), for example, 75 ° C., and crystallized, for example, up to 95 ° C.

  The PET bottle 1 may further have a crane neck portion 20 between the mouth portion 10 and the trunk portion 30. The neck portion 20 is continuous with the mouth portion 10 at the upper end in the axial direction, and is continuous with the shoulder portion 25 at the lower end in the axial direction. The neck 20 illustrated in FIG. 1 has a substantially truncated cone shape whose outer diameter slightly extends toward the lower side in the axial direction. On the other hand, the thickness of the neck portion 20 is thinner toward the lower side in the axial direction (see FIGS. 4 and 5). Furthermore, as illustrated in FIG. 1, the neck portion 20 may have a small diameter portion 21 having a small diameter on the upper side thereof. When the PET bottle 1 is transported, the gripper can hold the PET bottle 1 with the small diameter portion 21 in between. The small diameter portion 21 has a substantially true cylindrical shape whose outer diameter is the same in the upper and lower directions in the axial direction. The length of the small diameter portion 21 in the axial direction is, for example, 5 mm.

  By having the neck portion 20, the PET bottle 1 can be shaped like a wine bottle with excellent design. Furthermore, since the PET bottle 1 has the neck portion 20, the area in which the liquid level of the contents touches the air is reduced, and the oxidation of the contents is minimized. For this reason, while improving the preservability of the contents, it is possible to make it difficult to change the internal pressure (internal pressure) of the PET bottle 1.

  The shoulder 25 has an upper end continuous with the neck 20, and a lower end connected with the body 30. The shoulder portion 25 is a portion that connects the mouth portion 10 and the neck portion 20 to the body portion 30 having a diameter different from those of the mouth portion 10 and the neck portion 20. The shoulder portion 25 is formed in a substantially truncated cone shape whose diameter increases from the upper end to the lower end in the axial direction. As illustrated in FIG. 1, the shoulder portion 25 is curved toward the inside of the PET bottle 1 on the upper side in the axial direction and smoothly connected to the neck portion 20. Curved towards the outside.

  The shoulder 25 is preferably curved outward from the PET bottle 1 from the viewpoints of resistance to changes in the internal pressure of the PET bottle 1, formability indicating followability to the designed shape, capacity, and the like. However, it is not preferable that the shoulder portion 25 be extremely curved outward, in particular, upward because the shapeability is not good when the PET bottle 1 is formed by blow molding.

  The trunk portion 30 is continuous with the shoulder portion 25 at the upper end in the axial direction, and is continuous with the bottom portion 50 at the lower end in the axial direction. The trunk portion 30 has a substantially true cylindrical shape whose trunk diameter (outer diameter and inner diameter) and wall thickness hardly change in the axial direction. The outer diameter at which the diameter of the trunk portion 30 is the maximum is the maximum outer diameter D1.

  3 is a cross-sectional view taken along line III-III in FIG. FIG. 3 shows a cut surface at the center of the trunk portion 30 in the axial direction. The outer peripheral surface of the trunk portion 30 has a substantially spur gear shape in sectional view. That is, the trunk portion 30 includes a convex portion 31 that forms the outer peripheral surface of the PET bottle 1 and a concave portion 32 that is recessed from the convex portion 31 inward in the radial direction. The convex portion 31 and the concave portion 32 are connected by a linear inclined surface 33. The trunk portion 30 is configured in this way, so that the rigidity is increased.

  The convex part 31 is good to be curving toward the outer side of radial direction. The outer peripheral surface of the convex portion 31 is a position where the outer diameter of the PET bottle 1 is maximum, that is, the maximum outer diameter D1, and becomes a ground contact surface when the PET bottle 1 is placed sideways. Similarly, the recess 32 is curved outward in the radial direction. As a result, the step d between the concave portion 32 and the convex portion 31 does not become too large depending on the location, and even if the label is wound from above the trunk portion 30, the concave portion 32 is not easily marked. Therefore, the PET bottle 1 can be formed into a shape having excellent design properties like a wine bottle having a true cylindrical body 30.

  Here, the distance in the circumferential direction of the convex portion 31 and the concave portion 32 is defined as the respective width. The trunk portion 30 has a convex portion 31 having a narrow width and a concave portion 32 having a wide width. Accordingly, the convex portion 31 has high rigidity and a function of reinforcing the trunk portion 30. On the other hand, the concave portion 32 is easily deformed inward and outward in the radial direction, and has a function of absorbing the change in the internal pressure by changing the internal volume when the internal pressure of the PET bottle 1 changes. In particular, when the internal pressure of the PET bottle 1 changes, the concave portion 32 moves inward and outward in the radial direction according to the change of the internal pressure, and the convex portion 31 suppresses the influence of the movement from being propagated to other locations. Thus, the substantially cylindrical shape of the body 30 is maintained. Therefore, the trunk | drum 30 has the convex part 31 and the recessed part 32, and the deformation | transformation by the load from the outside and the deformation | transformation by the change of an internal pressure are suppressed.

  Furthermore, as illustrated in FIG. 3, the convex portion 31 may have a groove 34 that is recessed radially inward at the center in the circumferential direction. The groove 34 has a function of increasing the rigidity of the convex portion 31.

  If the level difference d from the convex portion 31 to the concave portion 32 is too small, the functions of the convex portion 31 and the concave portion 32 are hardly exhibited. On the other hand, if the level difference d from the convex part 31 to the concave part 32 is too large, the shaping property of the trunk | drum 30 will fall. Therefore, the step d is preferably 0.5 mm or more and 5.0 mm or less.

  If the angle of the inclined surface 33 with respect to the convex portion 31 and the concave portion 32 is too small, the shapeability of the body portion 30 is lowered. On the other hand, if the angle of the inclined surface 33 with respect to the convex portion 31 and the concave portion 32 is too large, the functions of the convex portion 31 and the concave portion 32 are hardly exhibited. Therefore, the inclination angle θi of the inclined surface 33 with respect to the convex part 31 and the concave part 32 is preferably 100 ° or more and 150 ° or less.

  As shown in FIG. 1, the convex portion 31 includes a plurality of columnar portions 35 in a front view, and includes a first columnar portion 35 a and a second columnar portion 35 b that are oblique with respect to the axial direction and the circumferential direction. Intersect. By each of the plurality of columnar portions 35 being inclined with respect to the axial direction and the circumferential direction, the buckling strength, which is the strength to withstand the load from the top and bottom in the axial direction, and the strength to withstand the load from the outside in the radial direction Both the side wall strength can be increased. By increasing the buckling strength of the body portion 30, it is possible to effectively prevent the occurrence of buckling deformation and prevent the collapse of the load when the PET bottles 1 are stacked. Furthermore, the ease of holding the PET bottle 1 is improved by increasing the side wall strength of the body portion 30.

  Although the illustration is omitted between one set of intersecting columnar portions 35 and 35 and another set of intersecting columnar portions 35 and 35, for example, the area of the substantially hexagonal recess 32 can be made relatively wide. it can. Accordingly, the concave portion 32 is easily deformed inward and outward in the radial direction, and has a function of absorbing the change in the internal pressure by changing the internal volume when the internal pressure of the PET bottle 1 is changed.

  The PET bottle 1 having such a configuration of the convex portion 31 (columnar portion 35) in the body portion 30 can suppress deformation due to an external load and deformation due to a change in internal pressure while having high design properties.

  The plurality of columnar portions 35 are preferably in an oblique lattice shape. By the plurality of columnar portions 35 having a lattice shape, the shape of the concave portion 32 surrounded by the plurality of columnar portions 35 can be balanced. As a result, even if a load is applied from the outside or a change occurs in the internal pressure, it is difficult for stress to concentrate on a specific location and the PET bottle 1 is prevented from being deformed.

  The PET bottle 1 having such a configuration of the plurality of columnar portions 35 in the body portion 30 can suppress deformation due to an external load and deformation due to a change in internal pressure while having high design properties.

  Each of the plurality of columnar portions 35 preferably extends between both ends of the trunk portion 30 in the axial direction. As a result, the buckling strength can be increased in the entire body 30.

  The plurality of columnar portions 35 illustrated in FIG. 1 can show the entire structure by taking up the four columnar portions 35. More specifically, the plurality of columnar portions 35 include the first columnar portion 35a, the second columnar portion 35b, the third columnar portion 35c, and the fourth columnar portion 35d described above. It is out. As described above, the first columnar portion 35a and the second columnar portion 35b intersect each other. Furthermore, the third columnar portion 35c extends from one end of the second columnar portion 35b and does not intersect the first columnar portion 35a. The fourth columnar portion 35d extends from one end of the first columnar portion 35a and intersects the third columnar portion 35c without intersecting the second columnar portion 35b. Such a configuration is repeated in the circumferential direction of the outer peripheral surface of the trunk portion 30. The PET bottle 1 having such a configuration of the body portion 30 can suppress deformation due to an external load and deformation due to a change in internal pressure while having high design properties.

  The columnar portion 35 can be increased or decreased in units of two. If the number of the plurality of columnar portions 35 is too small, the reinforcing effect against an external load is weakened, and the concave portion 32 is easily deformed. On the other hand, when the number of the plurality of columnar portions 35 is too large, the concave portions 32 are difficult to deform. Therefore, it is preferable that the plurality of columnar portions 35 be composed of 4 or more and 16 or less. As a result, deformation due to external loads and deformation due to changes in internal pressure are further suppressed. The columnar part 35 of the PET bottle 1 is composed of 12, for example.

  Here, regarding the columnar part 35, the circumferential length of the PET bottle 1 is defined as the width Bp of the columnar part 35. Similarly, with respect to the recess 32, the length of the maximum portion in the circumferential direction of the PET bottle 1 is defined as the width Bc of the recess 32. If the width Bp of the columnar part 35 is too small with respect to the width Bc of the recessed part 32, the reinforcing effect against an external load will be weakened and the recessed part 32 will be easily deformed. On the other hand, if the width Bp of the columnar part 35 is too large with respect to the width Bc of the recessed part 32, the recessed part 32 is difficult to deform. Therefore, the value of the ratio of the width Bp in the columnar portion 35 to the width Bc in the concave portion 32 is preferably 0.15 or more and 0.65 or less. The value of the ratio of the width Bp in the columnar portion 35 to the width Bc in the recess 32 of the PET bottle 1 is, for example, 0.38.

  An angle formed by the columnar portion 35 and a line extending in the circumferential direction is defined as an inclination angle θr of the columnar portion 35. However, the inclination angle θr of the columnar portion 35 is in the range of 0 ° to 90 °. If the inclination angle θr of the columnar part 35 is too small, the reinforcing effect against the load from the top and bottom in the axial direction will be weakened, and the concave part 32 will be easily deformed. On the other hand, if the inclination angle θr of the columnar portion 35 is too large, the reinforcing effect against the load from the outside in the radial direction will be weakened and the recess 32 will be difficult to deform. Therefore, the inclination angle θr of the columnar part 35 is preferably 30 ° or more and 80 ° or less. The inclination angle θr of the columnar portion 35 of the PET bottle 1 is 69 °, for example.

  Each of the plurality of columnar portions 35 has a straight line connecting a connection point between the first columnar portion 35a and the fourth columnar portion 35d and a connection point between the second columnar portion 35b and the third columnar portion 35c. It is preferable to arrange in parallel with the direction. In addition, the first columnar portion 35a and the third columnar portion 35c are preferably parallel, and the second columnar portion 35b and the fourth columnar portion 35d are preferably parallel. The concave portion 32 surrounded by the first columnar portion 35a, the second columnar portion 35b, the third columnar portion 35c, and the fourth columnar portion 35d configured as described above has a rhombus shape. As a result, the plurality of columnar portions 35 are arranged in a balanced manner, and even if a load is applied from the outside or a change occurs in the internal pressure, the stress is not easily concentrated on a specific portion, and the PET bottle 1 is deformed. Is prevented.

  Since the first columnar portion 35a and the second columnar portion 35b intersect with each other, the concave portion 32 becomes the end of the first columnar portion 35a, the second columnar portion 35b, and the body portion 30 in the axial direction. It also includes an isosceles triangular region surrounded by a line extending in the circumferential direction at the portion. Since the concave portion 32 is an isosceles triangle, it is difficult for stress to concentrate on a specific portion, and the concave portion 32 is prevented from being deformed. This region has a function of absorbing a change in the internal pressure of the PET bottle 1 as the pressure absorption assisting part 36. Therefore, the concave portion 32 includes the pressure absorption assisting portion 36, whereby deformation of the PET bottle 1 due to a change in internal pressure is further suppressed.

  As described above, the columnar portion 35 constituting the convex portion 31 has the groove 34. The groove 34 preferably extends between both ends of the columnar portion 35 in the axial direction. The groove 34 has a function of increasing its rigidity over the entire length of the columnar portion 35 in the axial direction. By configuring the PET bottle 1 in this way, deformation due to external load and deformation due to change in internal pressure are further suppressed.

  If the depth of the groove 34 is too shallow, the rigidity of the columnar portion 35 cannot be increased. On the other hand, if the depth of the groove 34 is too deep, the shapeability at the time of molding the PET bottle 1 is lowered. The depth of each groove 34 is preferably 0.005 or more and 0.07 or less, and more preferably 0.03, with respect to the maximum outer diameter D1.

  If the width of the groove 34 is too wide, the rigidity of the columnar portion 35 cannot be increased. On the other hand, when the width of the groove 34 is too narrow, the shapeability at the time of molding the PET bottle 1 is lowered. The width of the groove 34 is preferably 0.5 to 5.0 in terms of the ratio of the groove 34 to the depth.

  In FIG. 1 etc., the column-shaped part 35 illustrated the structure extended linearly. However, the columnar part 35 may be configured by a curve. Even in this case, it is preferable that the extending direction in each part of the curve is within the range of the inclination angle θr of 50 ° or more and 85 ° or less.

  The PET bottle 1 may have an upper connecting portion 40 that connects the shoulder portion 25 and the trunk portion 30, and a lower connecting portion 45 that connects the trunk portion 30 and the bottom portion 50. Both the upper connecting part 40 and the lower connecting part 45 may have the same outer diameter as the body part 30. That is, the PET bottle 1 may have an upper connecting portion 40 and a lower connecting portion 45 as connecting portions having the same diameter as the convex portion 31 on both outer sides in the axial direction from the body portion 30. .

  4 is a cross-sectional view taken along line IV-IV in FIG. 1, and FIG. 5 is a cross-sectional view taken along line VV in FIG. In the cross section shown in FIG. 4, the concave portion 32 in the body portion 30 is adjacent to the upper connecting portion 40 and the lower connecting portion 45. The recess 32 corresponds to the pressure absorption assisting part 36. On the other hand, in the cross section shown in FIG. 5, the convex portion 31 in the body portion 30 is adjacent to the upper connecting portion 40 and the lower connecting portion 45.

  As shown also in FIG. 5, the outer diameter of the upper connecting part 40 and the lower connecting part 45 having the same diameter as the convex part 31 has the maximum outer diameter of the PET bottle 1, that is, the maximum outer diameter D1. When the PET bottle 1 is placed sideways, both are ground planes. As a result, even when the PET bottle 1 is turned sideways, the upper connecting portion 40, the convex portion 31 (columnar portion 35), and the lower connecting portion 45 having the maximum outer diameter D1 are grounded portions, so that the PET bottle 1 is placed stably. be able to.

  Only the outer peripheral surfaces of the upper connecting portion 40 and the lower connecting portion 45 may be at positions having the maximum outer diameter D1. In this case, when the PET bottle 1 is turned sideways, each of the upper connecting portion 40 and the lower connecting portion 45 having the maximum outer diameter D1 serves as a ground contact portion. Even with such a configuration, the PET bottle 1 can be stably placed sideways.

  The convex portion 31 and the upper connecting portion 40 or the lower connecting portion 45 may be configured so as not to be disconnected in the axial direction. However, the PET bottle 1 has a gap portion 41 that is recessed inward in the radial direction between the convex portion 31 and the upper connecting portion 40, and similarly, the convex portion 31 and the lower connecting portion 45. It is preferable to have a gap 46 that is recessed inward in the radial direction. The gap 41 and the gap 46 have a function of absorbing loads from above and below in the axial direction. Therefore, the trunk portion 30 is less affected by the vertical direction than the trunk portion 30 due to the gap portion 41 and the gap portion 46, and deformation due to an external load is further suppressed.

  Each of the upper connecting portion 40 and the lower connecting portion 45 preferably has a circumferential groove 42 and a circumferential groove 47 in which a recess toward the radially inner side of the PET bottle 1 extends annularly in the circumferential direction. Thereby, the side wall strength in the vicinity of the upper connecting portion 40 and the lower connecting portion 45 can be increased. The circumferential groove 42 and the circumferential groove 47 have a circular cross-sectional shape in the horizontal direction, and the vertical cross-sectional shape is a shape obtained by rotating a substantially U shape having a flat bottom surface by 90 °. The PET bottle 1 preferably has no change in the overall length in the axial direction. For this reason, the circumferential groove 42 and the circumferential groove 47 may have a substantially arcuate cross-sectional shape in the vertical direction. In this way, it is possible to prevent the PET bottle 1 from extending in the axial direction even when the PET bottle 1 is filled with the high-temperature contents filled. Thereby, the axial length of the PET bottle 1 is not aligned, and the collapse of the load when the PET bottles 1 are stacked is prevented.

  If the depth of both the circumferential groove 42 and the circumferential groove 47 is too shallow, the side wall strength cannot be increased. On the other hand, if both the circumferential groove 42 and the circumferential groove 47 are too deep, the shapeability at the time of molding the PET bottle 1 is lowered. The depth of each of the circumferential groove 42 and the circumferential groove 47 is preferably 0.005 or more and 0.07 or less, and more preferably 0.03, with respect to the maximum outer diameter D1.

  If the width of the circumferential groove 42 and the circumferential groove 47 is too wide, the side wall strength cannot be increased. On the other hand, when the width of the circumferential groove 42 and the circumferential groove 47 is too narrow, the shapeability at the time of molding of the PET bottle 1 is lowered. The width of the circumferential groove 42 and the circumferential groove 47 is preferably such that the value of the ratio of the circumferential groove 42 and the circumferential groove 47 to the depth is 0.5 or more and 5.0 or less.

  FIG. 6 is a bottom view of the PET bottle 1. The bottom 50 is connected to the lower side of the lower connecting portion 45. The bottom part 50 has a corner part 51, a bottom wall 52, and a dome 53. The corner portion 51 is curved toward the lower side in the axial direction of the PET bottle 1 and the outer side in the radial direction. The substantially flat plate-shaped bottom wall 52 extends in a direction perpendicular to the axial direction in which the body portion 30 extends, and serves as a ground contact surface of the PET bottle 1. The diameter of the bottom wall 52 is 42 mm, for example.

  The dome 53 is formed in a hollow hemispherical shape that curves toward the inside (the upper side in the axial direction) of the PET bottle 1. The dome 53 has a function of preventing deformation due to changes in the temperature of the contents of the PET bottle 1 and the internal pressure. The dome 53 may be designed to have an inclination angle with respect to the ground contact surface within a range in which the internal pressure or the like is effectively dispersed to prevent the deformation of the PET bottle 1 and the shapeability is improved. The dome 53 illustrated in FIG. 6 does not have irregularities to resemble a wine bottle. However, the dome 53 is not limited to the example of FIG. 6, and may have radial ribs or circumferential ribs for preventing deformation. The protrusion height of the dome 53 from the ground contact surface is 10 mm, for example.

  The bottom part 50 should just be comprised so that it may be hard to deform | transform downward even if it makes positive pressure in the state which is easy to deform | transform with heat like the time of filling. As a result, the full capacity of the PET bottle 1 is increased from the design value, and it is possible to prevent the change in the internal pressure from becoming larger due to the increase in the proportion of air in the container. The bottom 50 may have an uneven bottom surface, for example, a petaloid shape. The dome 53 is designed to be maintained at least higher than the ground plane of the PET bottle 1 even if it is deformed by heat. Thus, the bottom 50 is prevented from projecting outward (downward) from the bottom wall 52, and rattling or overturning of the PET bottle 1 can be prevented.

  The PET bottle 1 according to this embodiment is not limited by size, and can be applied to various sizes. For example, the internal volume of the PET bottle 1 is preferably 80 ml or more and 1000 ml or less, and more preferably 150 ml to 720 ml. The total length in the axial direction of the PET bottle 1 may be 90 mm or more and 220 mm or less, and the maximum outer diameter D1 of the body 30 may be 45 mm or more and 80 mm or less.

  Furthermore, the PET bottle 1 according to the present embodiment can also be suitably used for lightweight bottles. In particular, from the viewpoint of maintaining strength capable of suppressing deformation due to external load and deformation due to change in internal pressure while having light weight, the value of the ratio of mass to the internal volume of the PET bottle 1 is 0.02 g. / Ml and 0.12 g / ml or less, more preferably 0.06 g / ml or less.

  Examples of the material of the plastic bottle exemplified by the PET bottle 1 include high-density polyethylene, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene, polypropylene, and other polyolefins, ethylene-vinyl alcohol copolymers, plants, and the like. Various plastics that can be blow molded, such as polylactic acid, can be used. However, the plastic bottle is preferably composed mainly of polyester such as polyethylene naphthalate, particularly polyethylene terephthalate. In addition, various additives such as a colorant, an ultraviolet absorber, a release agent, a lubricant, a nucleating agent, an antioxidant, and an antistatic agent are blended with the above-described resin within a range that does not impair the quality of the molded product. be able to.

  As the ethylene terephthalate thermoplastic resin constituting the PET bottle 1, the ethylene terephthalate unit occupies most of the ester repeating portion, generally 70 mol% or more, and the glass transition point (Tg) is 60 ° C. or higher and 90 ° C. The melting point (Tm) in the range of 200 ° C. or higher and 275 ° C. or lower is preferable. As an ethylene terephthalate thermoplastic polyester, polyethylene terephthalate is particularly excellent in terms of pressure resistance, but in addition to ethylene terephthalate units, it consists of dibasic acids such as isophthalic acid and naphthalenedicarboxylic acid, and diols such as propylene glycol. Copolyesters containing a small amount of ester units can also be used.

  Polyethylene terephthalate has the highest production volume among thermoplastic synthetic resins. The polyethylene terephthalate resin has various characteristics such as excellent heat resistance, cold resistance, chemical resistance, and wear resistance. Furthermore, polyethylene terephthalate resin has a lower proportion of petroleum in its raw materials than other plastics, and can be recycled. Thus, according to the structure which has a polyethylene terephthalate as a main component, a material with much production amount can be used and the outstanding various characteristic can be utilized.

  Polyethylene terephthalate is obtained by condensation polymerization of ethylene glycol (ethane-1,2-diol) and purified terephthalic acid. As a polymerization catalyst for polyethylene terephthalate, at least one of a germanium compound, a titanium compound, and an aluminum compound is preferably used. By using these catalysts, it is possible to form a container having higher transparency and excellent heat resistance than using an antimony compound.

  A plastic bottle, for example, a PET bottle 1 can be produced by stretching a preform in which the above-described material is injection-molded, for example. However, the manufacturing method is not particularly limited as long as the PET bottle 1 is manufactured so as to have the characteristics as described above. The preform is not limited to a single-layer structure made of the above-described materials, and may be composed of multiple layers. In the case of a multilayer, the preform may have, for example, an oxygen barrier layer or a water vapor barrier layer as an intermediate layer.

  A filling body is constituted by the PET bottle 1, the liquid to be filled, and the lid. The filling body is manufactured by filling a liquid such as a beverage or a seasoning from the mouth portion 10 of the PET bottle 1 and sealing with a lid (not shown) attached to the mouth portion 10.

  The lid may also be configured to serve as a container for receiving the contents. Furthermore, the filling body may be provided with a separate container covering from above the lid. These bowls may be, for example, wine or glass cups for drinking soft drinks, cups for drinking sake or shochu, and the contents of desktop seasonings such as soy sauce. It may be a hand salt pan for filling, or a measuring cup for measuring the volume of the concentrate.

  The PET bottle 1 may be packaged with a label such as a shrink label printed with information on the contents, a design for improving design properties, a roll label, a stretch label, a tack label, and the like. The label may cover a part of the PET bottle 1 such as the body 30, the mouth 10, the neck 20, or the like, or may be a full shrink label that covers the entire PET bottle 1. A biaxially stretched polystyrene film or the like having good heat shrinkability may be used for the shrink label attached by heat shrinkage. A polypropylene film or the like may be used for the roll label on which the overlapped portion of the wound label is bonded with an adhesive. Furthermore, a regenerated stretched polyethylene terephthalate film may be used for these labels.

  The PET bottle 1 has heat resistance against a hot liquid to be filled. Therefore, high-temperature filling, so-called hot filling, in which the PET bottle 1 is sterilized by heating it to a high temperature and sterilized by filling the PET bottle 1 with sterilized contents, can be used for manufacturing the filling body.

  The PET bottle 1 is excellent in the function of absorbing changes in internal pressure, particularly negative pressure. More specifically, the temperature of the high-temperature liquid at the time of filling is 55 ° C. or more and less than 90 ° C. On the other hand, the temperature of the contents after cooling is 0 ° C. or higher and 30 ° C. or lower. The PET bottle 1 has a function of sufficiently absorbing the change in internal pressure accompanying such a temperature change, that is, the negative pressure.

  On the other hand, for the production of the filling body, aseptic filling in which the contents sterilized in a short time at a high temperature are immediately cooled and packed in the PET bottle 1 at normal temperature, so-called aseptic filling can be used.

  The PET bottle 1 is also excellent in the function of absorbing positive pressure. Therefore, the contents of the PET bottle 1 can be suitably used for warming sales in a higher temperature state than at the time of filling. More specifically, the temperature of the contents is 15 ° C. or higher and 40 ° C. or lower when filled, and 50 ° C. or higher and 85 ° C. or lower when heated. The PET bottle 1 has a function of sufficiently absorbing such a change in internal pressure accompanying a temperature change, that is, a positive pressure.

  The absolute value of the pressure change amount of the filler according to the present embodiment is 1 kPa or more and 40 kPa or less. In particular, the PET bottle 1 is configured so that even if it has an absolute value of a large pressure change amount such as 20 kPa to 40 kPa inside the filling body, no distorted deformation occurs. The amount of pressure change in the filler is measured by a pressure gauge, for example, a diaphragm type pressure gauge. The pressure change amount may be measured by inserting a piercing needle communicating with a detector provided in the pressure gauge into the head space of the filling body.

  Next, the operation of the PET bottle 1 will be described in detail. As described above, the PET bottle 1 is sealed by hot-filling after the beverage is filled with, for example, a 70 ° C. beverage from the amorphous mouth portion 10 by hot filling, and then the lid is attached. . The filling body manufactured in this way is finally cooled to a low temperature, for example, 30 ° C. by gradually decreasing the temperature of the water sprayed by the pasterizer as a cooling unit.

  By cooling the filling body, the beverage and the gas enclosed in the upper portion of the beverage are also cooled, and the respective volumes are reduced. As a result, the inside of the sealed PET bottle 1 is subjected to negative pressure (decompression). By negative pressure inside, each part of the PET bottle 1 is pulled inward.

  However, the concave portion 32 effectively absorbs pressure by deforming following the negative pressure and changing the internal volume. On the other hand, the convex portion 31 having rigidity becomes a skeleton and holds the structure of the trunk portion 30. Further, the concave portion 32 includes a pressure absorption assisting portion 36, and this pressure absorption assisting portion 36 effectively assists in pressure absorption. Therefore, even if the PET bottle 1 is cooled and the inside of the PET bottle 1 is negatively pressured, the shoulder portion 25, the trunk portion 30, and the bottom portion 50 are not deformed into a distorted shape such as a dent, etc. , Easy to hold and maintain.

  Similarly, the operation of the PET bottle 1 when it is warmed will be described in detail. As described above, the PET bottle 1 is sealed by attaching a lid to the PET bottle 1 after filling a non-crystalline mouth 10 with, for example, a beverage at 30 ° C. by aseptic filling. . The thus manufactured filling body is shipped after being mounted on a corrugated board or the like after a label is attached to the body portion 30.

  In the store, the filler is placed on the product shelf in the hot warmer. The hot warmer includes a hot plate as a heater for heating and heating on the bottom surface of the product shelf. The filling body is heated and heated by being placed on a hot plate heated to, for example, 70 ° C. so that the liquid temperature becomes 50 ° C. or higher. When the PET bottle 1 is heated, the beverage and the gas sealed in the upper portion of the beverage are also heated, and the respective volumes increase. As a result, the inside of the sealed PET bottle 1 is positively pressurized (pressurized). By positively pressurizing the inside, each part of the PET bottle 1 is pushed outward.

  However, the concave portion 32 effectively absorbs pressure by changing its internal volume by following the positive pressure. On the other hand, the convex portion 31 having rigidity becomes a skeleton and holds the structure of the trunk portion 30. Further, the concave portion 32 includes a pressure absorption assisting portion 36, and this pressure absorption assisting portion 36 effectively assists in pressure absorption. Therefore, even if the PET bottle 1 is heated and positively pressurized, the bottom portion 50 bulges downward, the barrel portion 30 bulges excessively outward, etc., and deforms into an irregular shape. Therefore, a good appearance and ease of holding can be maintained.

  Furthermore, even when the liquid temperature of the filling body is cooled to room temperature, for example, 20 ° C. or less, the concave portion 32 is deformed following the negative pressure to effectively absorb pressure by changing the internal volume. On the other hand, the convex portion 31 having rigidity becomes a skeleton and holds the structure of the trunk portion 30. Further, the concave portion 32 includes a pressure absorption assisting portion 36, and this pressure absorption assisting portion 36 effectively assists in pressure absorption. Therefore, even if the PET bottle 1 is cooled and the inside of the PET bottle 1 is negatively pressured, the shoulder portion 25, the trunk portion 30, and the bottom portion 50 are not deformed into a distorted shape such as a dent, etc. , Easy to hold and maintain.

  As described above, the PET bottle 1 has at least the mouth portion 10, the body portion 30, and the bottom portion 50, and the body portion 30 has a convex portion 31 that constitutes the outer peripheral surface of the PET bottle 1 and a diameter from the convex portion 31. A concave portion 32 that is recessed inward in the direction, the concave portion 32 is curved outward in the radial direction, and the convex portion 31 is composed of a plurality of columnar portions 35, with respect to the axial direction and the circumferential direction. The oblique first columnar portion 35a and the second columnar portion 35b intersect each other. According to such a configuration, it is possible to provide the PET bottle 1 that has high design properties and can suppress deformation due to an external load and deformation due to a change in internal pressure.

  Furthermore, the filling body is composed of a PET bottle 1, a liquid to be filled, and a lid. According to such a configuration, it is possible to provide a filling body that has high designability and can suppress deformation due to an external load and deformation due to a change in internal pressure.

  The PET bottle 1 and the filling body according to this embodiment have a shape similar to a wine bottle that does not have a rugged pressure absorbing panel, but can be prevented from being deformed due to a change in internal pressure, thereby achieving both design and functionality. doing.

  Note that, in the plastic bottle and the filling body according to the present embodiment, the concave portion 32 is curved outward in the radial direction, and the convex portion 31 is composed of a plurality of columnar portions 35, with respect to the axial direction and the circumferential direction. As long as the oblique first columnar portion 35a and the second columnar portion 35b intersect, other configurations may be different.

  Hereinafter, the present disclosure will be described in more detail and specifically with reference to examples. However, the present disclosure is not limited to the following examples.

<Material and manufacturing method>
[Example 1]
A 20 g preform made of polyethylene terephthalate and having an amorphous, transparent mouth 10 was used. 1 and the like. The filled body is composed of a PET bottle 1 having a filled capacity of 350 ml according to the present embodiment shown in FIG. 1 and 330 ml of water filled at 70 ° C. and cooled to 30 ° C. by a pasterizer. Was made. The PET bottle 1 (filler) was produced with a maximum outer diameter D1 of 55 mm.

  The PET bottle 1 according to Example 1 has the characteristics according to the present embodiment such that the first columnar part 35a and the second columnar part 35b that are inclined with respect to the axial direction and the circumferential direction intersect. It was.

[Comparative Example 1]
Comparative Example 1 was the same as Example 1 except that the PET bottle 100 shown in FIG. 7 was used. The PET bottle 100 does not have a configuration corresponding to the convex portion 31 of the PET bottle 1, and the body portion 130 is covered with an outer peripheral surface having no irregularities over the entire circumference. Therefore, the filler according to Comparative Example 1 did not have the characteristics according to the present embodiment.

[Comparative Example 2]
Comparative Example 2 was the same as Example 1 except that the PET bottle 200 shown in FIG. 8 was used. The PET bottle 200 has convex portions 231 protruding from the concave portion 231 toward the outer side in the radial direction, but all extend in the circumferential direction and are parallel to each other and do not intersect with each other. Therefore, the filler according to Comparative Example 2 did not have the characteristics according to the present embodiment.

<Evaluation method>
(Buckling strength test)
A buckling strength test was performed in a state where the respective packing bodies of Example 1, Comparative Example 1, and Comparative Example 2 were upright. For the measurement of buckling strength, a tester manufactured by AGR, TOP LOAD, was used. A load was applied from the top of the mouth portion 10 at a constant speed, and the maximum load that resulted in a so-called yielding state was defined as the buckling strength. In the determination of the buckling strength, a threshold value was set to 250 N or more or less. Table 1 shows the results of the evaluation of the buckling strength of each filler, and is indicated by ◯: with buckling strength and x: insufficient buckling strength.

(Side wall strength test)
The side wall strength test of each trunk | drum in the state in which each packing body of Example 1, Comparative Example 1, and Comparative Example 2 was installed horizontally was done. For measuring the side wall strength, a tester manufactured by AGR, TOP LOAD, was used. After each filler was fixed so as not to roll, a load was applied at a constant speed from the top of each barrel, and the maximum load at which a so-called yield state was obtained was set as the side wall strength. In the determination of the side wall strength, 60 N or more or less was set as a threshold value. Table 1 shows the results of evaluation of the side wall strength of each filler, and is indicated by ◯: With side wall strength, x: Insufficient side wall strength.

(Pressure resistance test)
The PET bottle 1 of Example 1, the PET bottle 100 of Comparative Example 1, and the PET bottle 100 of Comparative Example 2 are used, and the temperature is different from that of the above-described filler until the empty space (head space) reaches 20 ml. Another filling body was produced by filling with water at 85 ° C. Each packing was cooled to 30 ° C. by a pasterizer. The pressure resistance performance was determined by visual observation of the presence or absence of irregular deformation of the container. Table 1 shows the results of the evaluation of the pressure-resistant performance of each filler, and is indicated by ◯: with pressure-resistant performance and x: insufficient pressure-resistant performance.

(Heating pressure resistance performance test)
The PET bottle 1 of Example 1, the PET bottle 100 of Comparative Example 1, and the PET bottle 200 of Comparative Example 2 are used, and 350 ml of water is filled at 30 ° C. at a temperature different from the above-described filling body. Yet another filler was made. The filler was placed on the product shelf of a hot warmer equipped with a hot plate for heating and heating on the bottom of the product shelf. The hot plate was set at 70 ° C. Since the influence when the filler is heated appears most remarkably in the bottom 50, the presence or absence of deformation of the bottom 50 was used as an index of the heating pressure resistance. Table 1 shows the results of the evaluation of the warming pressure resistance performance of each filler, and is indicated by ◯: with warming pressure performance, and x: insufficient warming pressure performance.

(Monitoring survey)
The PET bottle 1 of Example 1, the PET bottle 100 of Comparative Example 1, and the PET bottle 100 of Comparative Example 2 are used, and at a temperature different from the above-described filler at 60 ° C. until the empty size becomes 20 ml. Another filling was made by filling with water. Each packing was cooled to 30 ° C. by a pasterizer. A monitor of 100 people in their 20s to 70s observed each filled body and judged whether or not it was similar to a wine bottle of a glass bottle. About each filling body, what was similar was counted as 1 point, and what was not similar was counted as 0 points. Table 1 shows the total score.

(Comprehensive evaluation)
Based on the buckling strength test, the side wall strength test, the pressure resistance test, the heating pressure resistance test, and the monitoring survey described above, the PET bottles 1 and PET of Example 1, Comparative Example 1, and Comparative Example 2, respectively. The bottle 100 and the PET bottle 200 (each filler) were comprehensively evaluated. Table 1 shows the results of comprehensive evaluation. Comprehensive evaluation is described by (circle): favorable and x: no aptitude.

  The following points were derived from the examples described above. As shown in Table 1, Example 1 had sufficient buckling strength and side wall strength, was excellent in pressure resistance performance, and was also excellent in heating pressure resistance performance. Many monitors supported the similarity to wine bottles even under negative pressure. On the other hand, in Comparative Example 1, although the buckling strength was sufficient, all of the side wall strength, the pressure resistance performance, and the heating pressure resistance performance were insufficient. Furthermore, in Comparative Example 1, since the pressure-resistant performance of the body portion 130 was low, deformation occurred in a negative pressure state, and it was not determined that it was similar to a wine bottle. In Comparative Example 2, although the side wall strength was sufficient, all other buckling strength, pressure-resistant performance, and heating pressure resistance performance were insufficient. Further, the filling body of Comparative Example 2 also deformed in a negative pressure state because the pressure-reducing performance of the body portion 230 was low, and was not determined to be similar to a wine bottle.

  From the results of the above examples, the PET bottle 1 and the filling body according to the present embodiment sufficiently withstand the load from the vertical direction and the waistline direction, and change the internal pressure in both the positive pressure and the negative pressure. It was shown that deformation was sufficiently suppressed by absorption and high designability was maintained. Furthermore, the PET bottle 1 and the filling body according to the present embodiment were excellent in ease of holding. Therefore, in this embodiment, it was shown that it is possible to provide the PET bottle 1 and the filling body that have high designability and can be prevented from being deformed by an external load and deformation due to a change in internal pressure. .

  The present disclosure can be suitably used for various plastic bottles filled with liquid as contents. However, the present disclosure is not limited to the above-described embodiments and examples. Plastic bottles of the present disclosure include, for example, water, green tea, oolong tea, various non-carbonated beverages and carbonated beverages such as tea, coffee, fruit juice, and soft drinks, or seasonings such as soy sauce, sauce, and mirin, edible oil, wine and sake It is useful for the storage of foods including alcoholic beverages such as shochu, detergents, cosmetics, pharmaceuticals, and all other contents. Since the plastic bottle of the present disclosure can suppress the deformation of the container even under a severe internal pressure change condition, the product value is high even if it has a shelf life, no expiration date, or a very long content. Can be maintained up to. And since the container has heat resistance, the filling body of the present disclosure is also suitable for warm sales in stores and the like, and the container has sufficient side wall strength, so it can be used in vending machines. Is suitable. Furthermore, since the plastic bottle of this indication is excellent in design property, it is suitable also for souvenirs for overseas.

1 PET bottle (plastic bottle)
10 mouth portion 20 neck portion 30 trunk portion 31 convex portion 32 concave portion 34 groove 35 (35a, 35b, 35c, 35d) columnar portion (first, second, third, and fourth columnar portions)
36 Pressure absorption auxiliary part 40 Upper connection part 40 (connection part)
41 Gap 45 Lower connection 45 (connection)
46 Gap 50 Bottom

Claims (11)

In a plastic bottle having at least a mouth part, a body part, and a bottom part,
The trunk is
A convex portion constituting the outer peripheral surface of the plastic bottle;
A concave portion recessed from the convex portion toward the inside in the radial direction,
The concave portion is curved outward in the radial direction;
The said convex part consists of a some columnar part, and the 1st columnar part and 2nd columnar part which are diagonal with respect to the axial direction and the circumferential direction cross | intersect, The plastic bottle characterized by the above-mentioned. The plastic bottle according to claim 1, wherein the plurality of columnar portions have an oblique lattice shape. Each of the plurality of columnar portions extends between the axial ends of the body portion,
A third columnar portion extending from one end of the second columnar portion and not intersecting with the first columnar portion;
3. A fourth columnar portion that extends from one end of the first columnar portion and intersects the third columnar portion without intersecting with the second columnar portion. The plastic bottle according to any one of the above. The recess is
An isosceles triangular pressure absorption assisting portion surrounded by the first columnar portion, the second columnar portion, and the axial end portion of the trunk portion is included. 4. The plastic bottle according to any one of 3 above. The plastic bottle is
Each of the outer sides of the axial direction from the body portion has a connecting portion having the same diameter as the convex portion,
The plastic bottle according to any one of claims 1 to 4, further comprising a gap portion recessed toward the inside in the radial direction between the convex portion and the connecting portion. The columnar part is
The plastic bottle according to claim 1, further comprising a groove extending between both ends in the axial direction. The plastic bottle according to any one of claims 1 to 6, wherein the plurality of columnar portions are configured to be 4 or more and 16 or less. The plastic bottle is
The plastic bottle according to any one of claims 1 to 7, further comprising a crane-necked neck portion between the mouth portion and the trunk portion. A plastic bottle according to any one of claims 1 to 8,
Liquid to be filled,
With a lid,
The said plastic bottle has heat resistance with respect to the high temperature liquid with which it fills, The temperature of the said high temperature liquid is 55 degreeC or more and less than 90 degreeC, The filling body characterized by the above-mentioned. A plastic bottle according to any one of claims 1 to 8,
Liquid to be filled,
With a lid,
The filling material is characterized in that the temperature of the liquid filled in the plastic bottle is 15 ° C. or higher and 40 ° C. or lower when filled, and 50 ° C. or higher and 85 ° C. or lower when heated. The filling body according to any one of claims 9 to 10, wherein an absolute value of the pressure change amount of the filling body is 1 kPa or more and 40 kPa or less.

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