JP7451076B2 - plastic bottle - Google Patents

Description

TECHNICAL FIELD The present invention mainly relates to a plastic bottle that stores the liquid contents of food and drink products and the like.

BACKGROUND ART In recent years, plastic bottles have become commonplace as bottles for storing the liquid contents of foods and drinks, and such plastic bottles are loaded after containing the liquid contents.

Plastic bottles that contain such liquid contents are required to be lightweight as a whole. Additionally, in general, after a plastic bottle is filled with liquid, the specific gravity of the liquid changes, and the liquid absorbs oxygen present in the empty space of the plastic bottle, resulting in a phenomenon in which the pressure inside the bottle is reduced. Are known. However, when the weight of a plastic bottle is reduced, its thickness becomes thinner, so that the plastic bottle becomes easily deformed when such a reduced pressure occurs.

Japanese Patent Application Publication No. 2002-193229 Japanese Patent Application Publication No. 2003-285814

On the other hand, there is also known a technique for absorbing reduced pressure inside a plastic bottle by providing a reduced pressure absorption panel in the body of the plastic bottle (Patent Document 1). However, when such a vacuum absorption panel is provided, there is a problem in that the design of the plastic bottle deteriorates.

Furthermore, a plastic bottle in which circumferential ribs are arranged at equal intervals on the body of the bottle is also known (Patent Document 2), but if such a plastic bottle is made lightweight, it can sufficiently absorb the reduced pressure inside the bottle. That's difficult. On the other hand, it is conceivable to make the circumferential ribs larger, but in this case there is a risk that the design of the plastic bottle will deteriorate.

Furthermore, in general, in conventional plastic bottles, after the plastic bottle is filled with contents, various types of labels indicating the contents etc. are affixed and then sold as a product. Plastic bottles with such labels can be produced by loading a cylindrical heat-shrinkable film label (shrink label) onto a plastic bottle and then heat-shrinking it, or by wrapping a resin film (roll label) around a plastic bottle and wrapping the edges of the resin film. manufactured by gluing or fusing parts.

However, when providing a shrink label on a plastic bottle, for example, the shrink label can follow the shape of the plastic bottle, but there is a problem in that the manufacturing cost of the plastic bottle increases. For this reason, it is desired to use roll labels that can reduce the manufacturing cost of plastic bottles. On the other hand, although roll labels are inexpensive, they require a cylinder-shaped area to be provided in the body of the plastic bottle in order to adhere or fuse the ends of the resin film. Therefore, if the shape of the body of the plastic bottle is complicated, there is a problem that the resin film cannot be adhered or fused to the plastic bottle.

The present invention was made in consideration of these points, and even when the weight of the plastic bottle is reduced, it is possible to absorb the reduced pressure inside the bottle, and it is possible to easily attach a desired label. An object of the present invention is to provide a plastic bottle that can prevent the design from deteriorating.

The present invention provides a plastic bottle to which a label is attached, including a mouth, a shoulder provided below the mouth, a body provided below the shoulder, and a body provided below the body. a plurality of concave grooves extending in the vertical direction and each having a deformation inducing function are arranged in the circumferential direction, and between the concave grooves adjacent to each other in the circumferential direction; The plastic bottle is characterized in that each of the plastic bottles is formed with a circumferential wall having a rib function, and each of the recessed grooves fits within an area in which the label is placed.

The present invention is a plastic bottle characterized in that the width of each of the concave grooves is larger than the maximum depth of the concave grooves.

The present invention is a plastic bottle characterized in that the maximum depth of the concave groove is 0.5 mm or more and 4 mm or less.

The present invention is a plastic bottle characterized in that the height of the concave groove is 45 mm or more and 160 mm or less.

The present invention is a plastic bottle characterized in that the width of the concave groove is 10 mm or more and 40 mm or less.

The present invention is a plastic bottle characterized in that the body portion is formed with an attachment area to which an adhesive material for attaching the label is attached.

The present invention is a plastic bottle characterized in that the width of the concave groove is smaller than the width of the attachment area.

The present invention is a plastic bottle, wherein the pasting area is formed in an area where the concave groove is not formed.

The present invention is a plastic bottle characterized in that a region of the body where the concave groove is not formed has a uniform diameter from just below the shoulder to just above the bottom.

The present invention is a plastic bottle characterized in that the concave grooves are provided at equal intervals at predetermined angles in the circumferential direction.

According to the present invention, a plurality of concave grooves extending in the vertical direction and each having a deformation inducing function are arranged in the circumferential direction in the body, and ribs are provided between the concave grooves adjacent to each other in the circumferential direction. A functional circumferential wall is formed, each recessed groove falling within the area in which the label is placed. Therefore, even if the weight of the plastic bottle is reduced, it is possible to absorb the reduced pressure inside the bottle, and a desired label can be easily attached, which prevents the design from deteriorating. can.

FIG. 1 is a front view showing a plastic bottle according to an embodiment of the present invention. FIG. 2 is a top view showing a plastic bottle according to an embodiment of the present invention. FIG. 3 is a bottom view of a plastic bottle according to an embodiment of the present invention. FIG. 4 is a horizontal cross-sectional view (cross-sectional view taken along the line IV-IV in FIG. 1) showing a concave groove in the trunk. FIGS. 5(a) and 5(b) are horizontal sectional views of the body before and after the inside of the plastic bottle is depressurized, respectively. FIG. 6 is a front view showing a plastic bottle as a comparative example.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. 1 to 5 are diagrams showing one embodiment of the present invention.

First, the outline of the plastic bottle according to this embodiment will be explained with reference to FIGS. 1 to 4. In this specification, "upper" and "lower" respectively refer to the upper and lower parts of the plastic bottle 10 when it is erected (FIG. 1).

The plastic bottle 10 shown in FIGS. 1 to 4 is manufactured by preparing a preform obtained by injection molding and subjecting this preform to biaxial stretch blow molding. Such a plastic bottle 10 is a lightweight bottle having a volume of, for example, 150 ml or more and 750 ml or less. This plastic bottle 10 is a panelless bottle, that is, a panel that deforms by absorbing the reduced pressure inside the plastic bottle 10, such as a reduced pressure absorption panel, is not provided on the body 20 of the plastic bottle 10, which will be described later.

As shown in FIG. 1, the plastic bottle 10 includes a mouth portion 11, a shoulder portion 12 provided below the mouth portion 11, a body portion 20 provided below the shoulder portion 12, and a body portion 20 provided below the body portion 20. The bottom portion 30 has a bottom portion 30. Furthermore, a label La is provided on the outside of the plastic bottle 10. In addition, in FIG. 1, in order to clarify the concave groove 21 described later, the label La is shown by a broken line.

As shown in FIGS. 1 and 2, the mouth portion 11 includes a threaded portion 14 into which a cap 18 is screwed, and a flange portion 17 provided below the threaded portion 14. Note that the shape of the mouth portion 11 may be a conventionally known shape.

As shown in FIG. 1, the neck portion 13 is located between the flange portion 17 and the shoulder portion 12, and has a substantially cylindrical shape with a substantially uniform diameter. Further, the shoulder portion 12 is located between the neck portion 13 and the body portion 20, and has a shape whose diameter gradually increases from the neck portion 13 side toward the body portion 20 side. The shoulder portion 12 has a circular horizontal cross section, and a vertical cross section that is curved so as to swell from the inside to the outside.

As shown in FIGS. 1 to 4, the body 20 has a cylindrical shape as a whole, and a plurality of concave grooves 21 each extending in the vertical direction and each having a deformation inducing function are circularly formed in the body 20. They are arranged in a row in the circumferential direction. The concave groove 21 mainly serves to absorb the reduced pressure by deforming inward in the radial direction of the plastic bottle 10 when the pressure inside the plastic bottle 10 is reduced.

Moreover, each concave groove 21 is provided so as to fit within the area where the label La is arranged in the vertical direction. That is, as shown in FIG. 1, when the label La is attached to the plastic bottle 10, each concave groove 21 is covered by the label La, so that each concave groove 21 is difficult to see and is configured to be inconspicuous. ing.

In this embodiment, as shown in FIG. 4, the concave grooves 21 are provided so as to be equally spaced at a predetermined angle in the circumferential direction, and specifically, the concave grooves 21 are equally spaced at a predetermined angle in the circumferential direction. Five concave grooves 21 are provided in the. As a result, as will be described later, the deformation inducing function can be applied evenly along the circumferential direction to the body 20 of the plastic bottle 10, and the pressure of the plastic bottle 10 can be reduced evenly along the circumferential direction. can be absorbed into.

Moreover, as shown in FIG. 1, these concave grooves 21 have a substantially elliptical shape when viewed from the front. Here, the term "approximately elliptical shape" includes not only a strict elliptical shape but also a shape that approximates an elliptical shape by continuously connecting a plurality of minute circular arcs. Further, as shown in FIG. 4, each concave groove 21 is recessed inward in the radial direction, and the depth of the concave groove 21 is is the maximum. The maximum depth D of this concave groove 21 can be 0.5 mm or more and 4 mm or less, and can be 1 mm as an example. Note that by not making the depth of the concave groove 21 too large, it is possible to prevent the capacity of the plastic bottle 10 from decreasing. Further, since the depth of the concave groove 21 is not too small, the concave groove 21 can exhibit a reduced pressure absorption function.

Further, the width W1 of each concave groove 21 is larger than the maximum depth D of each concave groove 21. Thereby, when the pressure inside the plastic bottle 10 is reduced, the concave groove 21 is easily deformed inward in the radial direction of the plastic bottle 10, and the reduced pressure in the plastic bottle 10 can be effectively absorbed. Further, as will be described later, the width W1 of the concave groove 21 is smaller than the width W2 of the pasting area 23, which will be described later. The width W1 of such a concave groove 21 may be, for example, 10 mm or more and 40 mm or less. By setting the width W1 of the concave groove 21 to 10 mm or more, the deformation inducing function of the concave groove 21 can be effectively exhibited. In addition, by setting the width W1 of the concave groove 21 to 40 mm or less, when attaching the label La to the plastic bottle 10, the adhesive member gets into the concave groove 21, making it difficult to attach the label La. It can be prevented. Here, in this specification, the width W1 of the concave groove 21 refers to the length of the concave groove 21 along the circumferential direction.

Further, the height H of the concave groove 21 may be, for example, 45 mm or more and 160 mm or less. By setting the height H of the concave groove 21 to 45 mm or more, the deformation inducing function of the concave groove 21 can be effectively exhibited. Moreover, by setting the height H of the concave groove 21 to 160 mm or less, shapeability during blow molding can be improved.

On the other hand, in the body portion 20, circumferential walls 22 each having a rib function are formed between concave grooves 21 adjacent to each other in the circumferential direction. That is, the region where the concave groove 21 is not formed is made up of the circumferential wall 22. In this way, the body portion 20 is composed only of the concave grooves 21 and the circumferential wall 22. The circumferential wall 22 mainly serves to increase the strength around the central portion of the body portion 20, which is a portion that is easily deformed, and to prevent this portion from being depressed in the horizontal direction.

The area (circumferential wall 22) in which this concave groove 21 is not formed has a uniform diameter from just below the shoulder 12 to just above the bottom 30. As a result, for example, when the plastic bottle 10 is stored horizontally in a vending machine, it can be brought into contact with other adjacent plastic bottles 10 over a wide area, so that the body 20 will not be deformed in the vending machine. can be prevented.

Furthermore, an attachment area 23 is formed on the body portion 20 to which an adhesive material for attaching the label La is attached. In this embodiment, the pasting region 23 is formed in a region where the concave groove 21 is not formed, that is, in the circumferential wall 22 . This can prevent the adhesive material from entering the concave groove 21 and making it difficult to attach the label La using the adhesive material. Further, as described above, the width W1 of the concave groove 21 is smaller than the width W2 of the pasting area 23. Thereby, even if the pasting area 23 is formed in a portion overlapping the concave groove 21, at least a portion of the pasting area 23 can be formed on the circumferential wall 22. Therefore, even if the attachment region 23 is formed in a portion overlapping the concave groove 21 and the adhesive material enters the concave groove 21, the label La can be attached to the body 20 of the plastic bottle 10. Here, in this specification, the width W2 of the pasting area 23 refers to the length of the pasting area 23 along the circumferential direction.

On the other hand, as shown in FIGS. 1 and 3, the bottom part 30 includes a circular recess 31 located at the center, a radial panel 32 provided in the recess 31 and extending radially, and a ground panel 32 provided around the recess 31. 33. In addition, although the number of radial panels 32 is five in FIG. 3, it is not limited to this, and may be set within a range of, for example, 4 or more and 11 or less. At this time, the number of radial panels 32 is preferably an odd number. By arranging the radial panels 32 in this manner, the strength of the bottom portion 30 is increased and deformation of the bottom portion 30 is less likely to occur. Note that the shape of the bottom portion 30 is not particularly limited, and may have a conventionally known bottom shape (for example, a petaloid bottom shape, a round bottom shape, etc.).

Further, the thickness of the plastic bottle 10 at the circumferential wall 22 of the body portion 20 is not limited to this, but can be made as thin as, for example, about 50 μm or more and 350 μm or less. In this case, the thickness of the plastic bottle 10 at each concave groove 21 may be smaller than the thickness of the plastic bottle 10 at the circumferential wall 22. Thereby, when the pressure inside the plastic bottle 10 is reduced, each concave groove 21 can be easily deformed inward in the radial direction of the plastic bottle 10, and the reduced pressure can be effectively absorbed. Further, the weight of the plastic bottle 10 is not limited to this, but in a plastic bottle 10 having a volume of 500 ml, it can be 10 g or more and 26 g or less. By reducing the wall thickness of the plastic bottle 10 in this manner, the weight of the plastic bottle 10 can be reduced.

Such a plastic bottle 10 can be manufactured by biaxially stretching blow molding a preform manufactured by injection molding a synthetic resin material. As the material for the preform, that is, the plastic bottle 10, it is preferable to use a thermoplastic resin, particularly PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), or PEN (polyethylene naphthalate).

Moreover, the plastic bottle 10 can also be formed as a multilayer molded bottle having two or more layers. That is, by extrusion molding or injection molding, for example, the intermediate layer is made of MXD6, MXD6 + fatty acid salt, PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer), or PEN (polyethylene naphthalate) with gas barrier properties and light shielding properties. A multilayer bottle having gas barrier properties and light shielding properties may be formed by extrusion molding a preform consisting of three or more layers as a resin (intermediate layer) and then blow molding it. Note that such an intermediate layer is preferably provided at least in the body 20 of the plastic bottle 10. Further, it is preferable to provide an intermediate layer in a region of the bottom portion 30 excluding the central portion of the bottom portion 30. This is because there is a risk of delamination (delamination) in this part when the case receives an impact such as being dropped. In order to have gas barrier properties and light blocking properties, a blend bottle may be formed by blending thermoplastic resins together in addition to multi-layer construction.

Further, as described above, the plastic bottle 10 is a panelless bottle, and the body 20 of the plastic bottle 10 is not provided with a panel that deforms by absorbing the reduced pressure inside the plastic bottle 10, such as a reduced pressure absorption panel. Therefore, the design of the plastic bottle 10 is improved. Furthermore, it is easy to arrange the label La around the body 20 of the plastic bottle 10.

Next, the label La will be explained.

The label La indicates the contents, etc., and is attached to the outer surface of the plastic bottle 10. This label La may be produced, for example, by forming a sheet of film into a cylindrical shape and pasting the ends together. The label La is adhered to the plastic bottle 10 with an adhesive material attached to the pasting area 23. As shown in FIGS. 2 to 4, the label La is provided over the entire circumferential area of the plastic bottle 10 so as to surround it, and has a substantially circular horizontal cross section.

In this case, the label La is provided so as to cover the body 20 of the plastic bottle 10. However, the label La may be provided in the entire area or a partial area of the plastic bottle 10 other than the mouth part 11. For example, the label La may be provided to cover the shoulder 12, body 20, and bottom 30 of the plastic bottle 10, excluding the mouth 11 and neck 13. Alternatively, the label La may be provided to cover the shoulder portion 12 and the body portion 20 of the plastic bottle 10. Furthermore, the number of labels La is not limited to one, and a plurality of labels may be provided.

Examples of the label La include roll labels, tack labels, paper labels, and the like. Among these, it is preferable to use roll labels because of their high productivity. Note that, as the label La, for example, a shrink label, a stretch label, or the like that does not use an adhesive material may be used.

Next, the operation of this embodiment having such a configuration will be explained.

First, an empty plastic bottle 10 is prepared, and the plastic bottle 10 is filled with a liquid such as a beverage. Subsequently, the mouth portion 11 is closed with a cap (not shown). After the plastic bottle 10 is closed, the inside of the plastic bottle 10 is depressurized because the specific gravity of the liquid content changes or the liquid content absorbs oxygen present in the empty space (head space) of the plastic bottle 10. The state will be as follows. When a negative pressure is generated inside the plastic bottle 10 in this way, stress is generated inward of the plastic bottle 10. Examples of such contents include tea drinks, sports drinks, coffee drinks, and the like.

In contrast, in this embodiment, a plurality of concave grooves 21 having a deformation inducing function are formed in the body portion 20. These concave grooves 21 deform inward in the radial direction of the plastic bottle 10, as shown in FIGS. 5(a) and 5(b), when the inside of the plastic bottle 10 is depressurized. Therefore, the concave groove 21 can absorb the reduced pressure of the plastic bottle 10. In particular, since the width W1 of each concave groove 21 is larger than the maximum depth D of each concave groove 21, when the inside of the plastic bottle 10 is depressurized, the concave groove 21 will move radially inward. It is easily deformed. Therefore, the reduced pressure of the plastic bottle 10 can be effectively absorbed by the concave groove 21. Note that FIG. 5(a) is a partially enlarged view of the concave groove 21 and the circumferential wall 22 before the inside of the plastic bottle 10 is depressurized, and FIG. 5(b) is a partial enlarged view of the inside of the plastic bottle 10 after the inside is depressurized. 2 is a partially enlarged view of a concave groove 21 and a circumferential wall 22. FIG.

Further, a plurality of circumferential walls 22 having a rib function are formed on the body portion 20. As a result, even when the reduced pressure inside the plastic bottle 10 is absorbed, the circumferential wall 22 does not dent significantly inward. Therefore, the strength around the central portion of the body portion 20 can be effectively increased. As a result, due to the rigidity of each circumferential wall 22, large deformation of the plastic bottle 10 can be suppressed.

Since the concave groove 21 deforms inward in the radial direction of the plastic bottle 10 in this way, the reduced pressure of the plastic bottle 10 can be absorbed. On the other hand, due to the rigidity of the circumferential wall 22, the circumferential wall 22 does not dent significantly inward, so that the plastic bottle 10 does not undergo any major deformation in appearance.

By the way, in such a plastic bottle 10, after the plastic bottle 10 is filled with contents, a label indicating the contents etc. is attached and then sold as a product. In this case, the label La is adhered to the plastic bottle 10 by the adhesive material applied to the pasting area 23. Here, in the plastic bottle 10, the pasting region 23 is formed in a region where the concave groove 21 is not formed, that is, in the circumferential wall 22. Thereby, when attaching the label La to the plastic bottle 10, it is possible to prevent the adhesive material from entering the concave groove 21 and making it difficult to attach the label La. Further, since the width W1 of the concave groove 21 is smaller than the width W2 of the pasting area 23, even if the pasting area 23 is formed in a portion overlapping the concave groove 21, at least one portion of the pasting area 23 A section can be formed in the circumferential wall 22. Therefore, even if the attachment region 23 is formed in a portion overlapping the concave groove 21 and the adhesive material enters the concave groove 21, the label La can be attached to the body 20 of the plastic bottle 10.

As described above, according to the present embodiment, a plurality of concave grooves 21 are provided in the body portion 20 in a row in the circumferential direction, each extending in the vertical direction and each having a deformation inducing function, and mutually extending in the circumferential direction. Circumferential walls 22 each having a rib function are formed between the concave grooves 21 adjacent to each other. Thereby, when the pressure inside the plastic bottle 10 is reduced, the concave groove 21 deforms inward in the radial direction of the plastic bottle 10, thereby absorbing the reduced pressure inside the plastic bottle 10. Moreover, even if the concave groove 21 absorbs the reduced pressure inside the plastic bottle 10, the rigidity of the circumferential wall 22 can suppress large deformation of the plastic bottle 10. Furthermore, each concave groove 21 falls within the area where the label La is placed. Thereby, when the label La is attached to the plastic bottle 10, each concave groove 21 is covered with the label La, and each concave groove 21 can be made less visible and less noticeable. Furthermore, in this embodiment, the body 20 is composed only of the concave grooves 21 and the circumferential walls 22, so there is no need to provide the body 20 with a vacuum absorption panel. Therefore, the design of the plastic bottle 10 does not deteriorate due to the vacuum absorption panel.

Further, in this embodiment, the width W1 of each concave groove 21 is larger than the maximum depth D of each concave groove 21. Thereby, when the inside of the plastic bottle 10 is depressurized, the concave groove 21 is easily deformed inward in the radial direction. Therefore, the concave groove 21 can effectively absorb the reduced pressure of the plastic bottle 10.

Furthermore, in this embodiment, the body portion 20 is formed with an attachment area 23 to which an adhesive material for attaching the label La is attached. Further, the pasting region 23 is formed in a region where the concave groove 21 is not formed, that is, in the circumferential wall 22. This can prevent the adhesive material from entering the concave groove 21 and making it difficult to attach the label La using the adhesive material. Therefore, a roll label with high productivity can be suitably used as the label La.

Further, in this embodiment, the width W1 of the concave groove 21 is smaller than the width W2 of the pasting area 23. Thereby, even if the pasting area 23 is formed in a portion overlapping the concave groove 21, at least a portion of the pasting area 23 can be formed on the circumferential wall 22. Therefore, even if the attachment region 23 is formed in a portion overlapping the concave groove 21 and the adhesive material enters the concave groove 21, the label La can be attached to the body 20 of the plastic bottle 10.

Furthermore, in this embodiment, the concave grooves 21 are provided so as to be equally spaced at predetermined angles when viewed from the top and bottom. Thereby, the deformation inducing function can be applied evenly along the circumferential direction to the body 20 of the plastic bottle 10, and the reduced pressure of the plastic bottle 10 can be evenly absorbed along the circumferential direction. can.

Next, specific examples of the present invention will be described.

(Example)
First, a plastic bottle 10 having a capacity of 520 ml and having the configuration shown in FIGS. 1 to 4 was manufactured.

In this case, a PET single-layer preform of 18 g was produced by injection molding, and a plastic bottle 10 with a capacity of 520 ml was produced by biaxial stretch blow molding of this preform.

The obtained plastic bottle 10 was filled with 500 ml of water and capped with a cap with a rubber stopper.

Thereafter, air was removed from the empty space (head space) of the plastic bottle 10 using a syringe. Then, it was examined whether or not the plastic bottle 10 suffered any major deformation such as depression, elliptical deformation, or bending deformation, and the amount of air extracted was measured (Table 1).

(Comparative example)
On the other hand, as a comparative example, a plastic bottle 110 with a capacity of 520 ml shown in FIG. 6 was produced. A plastic bottle 110 shown in FIG. 6 includes a mouth portion 111, a shoulder portion 112, a body portion 120, and a bottom portion 130, and the body portion 120 is not provided with a concave groove.

In this case, a PET single-layer preform of 18 g was produced by injection molding, and a plastic bottle 100 with a capacity of 520 ml was produced by biaxial stretch blow molding of this preform.

The obtained plastic bottle 110 was filled with 500 ml of water and capped with a cap with a rubber stopper.

Thereafter, air was extracted from the empty space (head space) of the plastic bottle 110 using a syringe. Then, it was examined whether or not the plastic bottle 110 was deformed, and the amount of air extracted was measured (Table 1).

As shown in Table 1, in the plastic bottle 110 of the comparative example, when 10 ml of air was extracted from the empty portion of the plastic bottle 110, a large deformation (elliptical deformation) occurred in the plastic bottle 110. Specifically, the horizontal cross section of the body 120 of the plastic bottle 110 was deformed into an elliptical shape. On the other hand, in the plastic bottle 100 of the example, even when 10 ml of air was removed from the empty part of the plastic bottle 10, the plastic bottle 10 did not undergo major deformation, and 20 ml of air was removed from the empty part of the plastic bottle 10. I was able to extract it.

As described above, the plastic bottle 10 according to the example did not undergo large deformation when the inside was depressurized, compared to the plastic bottle 110 according to the comparative example. Therefore, it is considered that the reduced pressure of the plastic bottle 10 can be effectively absorbed.

10 Plastic Bottle 11 Mouth 12 Shoulder 20 Body 21 Concave Groove 22 Circumferential Wall 23 Pasting Area 30 Bottom 31 Concave 32 Radial Panel La Label

Claims (8)

In plastic bottles to which labels are attached,
mouth and
a shoulder provided below the mouth;
a torso section provided below the shoulder section;
a bottom portion provided below the body portion;
A plurality of concave grooves extending in the vertical direction and each having a deformation inducing function are provided in the body in a row in the circumferential direction,
Circumferential walls each having a rib function are formed between the concave grooves adjacent to each other in the circumferential direction,
Each of the concave grooves fits within an area in which the label is placed in both the vertical and circumferential directions;
A pasting area is formed on the body to which an adhesive material for pasting the label is attached;
The width of the concave groove is smaller than the width of the pasting area,
The width of the pasting area is smaller than the width of the circumferential wall,
The pasting area fits within the area in which the concave groove is provided in the vertical direction,
The plastic bottle is characterized in that the concave groove has an elliptical shape or a shape approximated to an ellipse by continuously connecting a plurality of minute arcs when viewed from the front. The plastic bottle according to claim 1, wherein the width of each of the concave grooves is greater than the maximum depth of the respective concave grooves. The plastic bottle according to claim 1 or 2, wherein the maximum depth of the concave groove is 0.5 mm or more and 4 mm or less. The plastic bottle according to any one of claims 1 to 3, wherein the height of the concave groove is 45 mm or more and 160 mm or less. The plastic bottle according to any one of claims 1 to 4, wherein the width of the concave groove is 10 mm or more and 40 mm or less. The plastic bottle according to any one of claims 1 to 5, wherein the pasting area is formed in an area where the concave groove is not formed. The plastic bottle according to any one of claims 1 to 6, wherein a region of the body where the concave groove is not formed has a uniform diameter from just below the shoulder to just above the bottom. . 8. The plastic bottle according to claim 1, wherein the concave grooves are equally spaced at predetermined angles in the circumferential direction.