JP2020128241A - Plastic bottle - Google Patents

Abstract

To provide a plastic bottle capable of attaching a label widely and absorbing a change in an internal pressure.SOLUTION: A body portion 12 of a plastic bottle 1 includes a smooth portion 30 on a front face, and a pressure absorption portion 20 having pressure absorption panels 21, 22 on a back face.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic bottle, and more particularly to a plastic bottle provided with a pressure absorbing panel only on a part of a body.

Plastic bottles, especially PET (PolyEthylene Terephthalate) bottles, are often used as containers for filling beverages and the like. Plastic bottles have come to be used for gifts and the like in addition to vending machines, shelves in convenience stores and the like.

In Patent Document 1, in a blow-molded bottle made of plastic, by changing the curvature on the front surface side and the curvature on the back surface side of the horizontal cross section of the body of the blow-molded bottle, it is deformed in accordance with the reduction of the internal pressure of the bottle. Disclosed is a blow-molded bottle characterized by intentionally providing a surface on the side to be blown. In other words, a technique is disclosed in which a plastic bottle is provided with a surface that is intentionally deformed to absorb a portion where the internal pressure is reduced.

Patent Document 2 discloses a synthetic resin bottle in which gripping recesses are provided on both sides of a body of a bottle body including a mouth, a body, and a bottom, and the shortest distance between the deepest parts of the gripping recesses on both sides ( L) is 50% or less (L/D≦50%) of the diameter (D) of the body portion, and the radial cross-sectional shape of the holding recess connects the deepest portion and the axial center of the body portion. Disclosed is a synthetic resin bottle which is symmetrical with respect to a straight line.

In Patent Document 3, the mouth, shoulder, body and bottom are integrally molded with the bottle axis as a common axis, and are round bottles that are circular in a top view of the bottle.
Between the body portion and the shoulder portion, and between the body portion and the bottom portion, circumferential grooves that extend along the entire circumference of the bottle and are recessed inward in the bottle radial direction are formed, respectively. In addition, a reduced pressure absorption panel for absorbing a decrease in the internal pressure of the bottle is formed, and a recessed portion that is recessed inward of the bottle is formed on both sides of the virtual perpendicular line of the reduced pressure absorption panel in a bottle cross-sectional view. It is formed, and the portion between the recesses on both sides is a grip portion, and the body portion has an imaginary circumscribed circle contacting the outer peripheral surface thereof in the cross-sectional view of the bottle is an ellipse long in the imaginary perpendicular direction. Disclosed is a bottle characterized in that the peripheral groove is formed in such a shape, and the circumferential groove is formed in a perfect circular shape in a cross sectional view of the bottle.

JP 2001-199419 A JP, 2002-154515, A JP, 2009-029493, A

However, the technique of Patent Document 1 is different from the configuration in which the pressure absorbing panel is provided in a part of the body portion, and when the entire circumference is covered with a shrink film that is generally used for labels of PET bottles. However, the deterioration of the commercial property and aesthetics due to the occurrence of wrinkles and distortion of the shrink film due to the deformed portion is not considered.

Although Patent Document 2 discloses that the shortest distance (L) is 50% or less of the diameter (D) of the body portion, it is obvious from the reference of FIG. In order to obtain the effect of being easy to hold, the shortest distance (L) must be set to a size suitable for a human hand, and inevitably the size (L) must be increased to some extent. Further, it is not disclosed to secure an area for attaching a label on the front surface of the body.
Further, even in Patent Document 3, although a device for coping with reduced pressure is devised, there is no disclosure regarding the configuration as to whether or not the label is distorted when viewed from one direction. Since the recessed portion is provided around the reduced pressure absorption panel, it is necessary to form a recessed portion in a considerable proportion with respect to the entire circumference of the plastic bottle, and it can be said that the appearance cannot be maintained from one direction. ..

In the first place, if the conventional plastic bottle is filled with the contents, especially the liquid contents, and then the container is closed, the temperature in the filling and the difference in the temperature during storage or use, the pressure in the container becomes low, As it rises, the container may be deformed. For example, when the content liquid is filled at 80 degrees for the purpose of sterilizing the inside of the container and cooled to room temperature, the inside of the container is depressurized. When the container filled with the content liquid is heated, the pressure inside the container rises. For the purpose of absorbing such a pressure change in the container, the container is generally provided with a window frame-shaped pressure absorbing panel. Alternatively, there is a method in which the container is reinforced by providing a circumferential groove or the like to prevent the container from being deformed due to a change in pressure.

However, if a pressure absorbing panel is provided on the entire circumference, the product name and contents are generally displayed on the container by a label or other display means, and the display of that part is distorted and the display is There is a problem in that it becomes difficult to read and brand value is damaged due to display distortion.

However, if the structure does not include a pressure absorbing panel at all, there is a problem that the plastic bottle itself may be deformed because it cannot respond to changes in internal pressure.
Therefore, an object of the present invention is to provide a pressure absorbing panel only in a part of the cylindrical plastic bottle and not providing a pressure absorbing panel in the other part, thereby responding to a pressure change in the container, and It is an object of the present invention to provide a plastic bottle capable of preventing the display from being distorted and having a wide smooth display surface because the surface of the display plastic bottle has a smooth cylindrical shape.

In a plastic bottle having a mouth portion, a shoulder portion, a body portion, and a bottom portion, and the body portion is a cylindrical shape, the body portion includes a smooth portion and a pressure absorbing panel portion, and the smooth portion is the body portion of the body portion. It has a cylindrical shape with no irregularities in the range of 180 to 300 degrees around the circumference, and is characterized in that at least one pressure absorbing panel is provided in the pressure absorbing panel section.

Further, the pressure absorbing panel section is characterized in that the two pressure absorbing panels are provided side by side in the circumferential direction.

Further, a display is provided on the smooth portion.

Further, a circumferential groove is provided over the entire circumference of the body portion above the pressure absorbing panel, and the circumferential groove is provided under the pressure absorbing panel over the entire circumference.

The present invention has a mouth part, a shoulder part, a body part, and a bottom part, and in the plastic bottle having a cylindrical shape, the body part is composed of a smooth part and a pressure absorbing panel part, and the smooth part is It is characterized in that the body has a cylindrical shape without irregularities in the range of 180 degrees to 300 degrees, and at least one pressure absorption panel is provided in the pressure absorption panel section. Since a pressure-absorbing panel absorbs and a wide smooth display surface is provided, a plastic bottle that does not wrinkle when attached to a label for display and has excellent brand value, aesthetics, and marketability Can be provided. Furthermore, since the body has a smooth display surface, it is possible to directly print the display content on the display surface without mounting a label made of paper or plastic film.

Further, the pressure absorbing panel section is characterized in that the two pressure absorbing panels are provided side by side in the circumferential direction. Even in the case of plastic bottles displayed for gifts, when stored in a box, the front side should be a smooth part with a display, and the part that is invisible to the consumer should be the pressure absorbing panel part. Becomes Therefore, the pressure-absorbing panel is flat and the two pressure-absorbing panels form a corner with each other, so that when the box is stored in the box, it is easy to fix the corner around the corner for easy storage. Even when a box containing a plastic bottle for gifts is sent to, it is easy to store it so that the smooth part with the display will always be on the front side of the box regardless of the vibration during sending, even when opening after sending. Can be

Since the smooth portion is provided with a display, the smooth portion can be widened, and as a result, a wrinkle-free display can be performed in a wide range. As a result of being able to display a product name, a logo, and a brand name in a wide range without wrinkles, it is possible to provide a plastic bottle excellent in advertising, maintaining brand value, and improving commercial property.

A circumferential groove is provided over the entire circumference of the body above the pressure absorbing panel, and the circumferential groove is also provided under the pressure absorbing panel over the entire circumference. Even if there is a change in the internal pressure that cannot be absorbed by the absorption panel, this peripheral groove can absorb the pressure due to the change in the internal pressure, and in general, a rectangular label is attached. Therefore, when the label is attached, it is easy to make the label not come on the circumferential groove, and it is possible to prevent the label from wrinkling due to the circumferential groove. A wide and smooth label can be attached to the surface.

It is the rear view and front view which showed an example of the plastic bottle which concerns on this embodiment. It is the sectional view on the AA line and the top view of the plastic bottle of FIG. It is a figure of the example in which the label was attached to the plastic bottle of FIG. It is a perspective view when a cap is attached to the plastic bottle of FIG. 1 and the plastic bottle is stored in a storage case.

Hereinafter, the embodiment of the present invention will be described in detail with reference to the drawings. First, the configuration of the PET (PolyEthylene Terephthalate) bottle according to the present embodiment will be described in detail. FIG. 1 is a rear view and a front view showing an example of a plastic bottle 1 according to the present embodiment. Note that, for convenience of description, the front surface in this disclosure is the surface indicated by (Y) in FIG. 1, and the back surface is the surface indicated by (X), and the direction of the mouth portion 10 in FIG. Below. 2(X) is a cross-sectional view taken along the line AA in FIG. 1(X), and FIG. 2(Y) is a top view of the plastic bottle 1 of FIG. FIG. 3 shows the plastic bottle 1 of FIG. 1 with a label 50 attached. FIG. 4 is a view showing a case where the plastic bottle 1 with the label of FIG. 3 attached is stored in the storage case 60.

As shown in FIG. 1, the mouth portion 10 is the mouth portion 10 of the plastic bottle 1 which is closed by a general cap having an opening opened in a circular shape at the upper end in the axial direction. The mouth portion 10 has a male screw, a turnip, and a support ring on the outer peripheral surface thereof. A male screw for attaching a lid (not shown) spirally protrudes from the outer peripheral surface of the mouth portion 10 toward the outer side in the radial direction of the plastic bottle 1. The turnip projects circumferentially outwardly below the male screw toward the outside in the radial direction. The support ring protrudes circumferentially below the turnip and to the outside in the radial direction of the turnip.

Here, there is no particular limitation on the dimensions of each part such as the inner diameter and outer diameter (corresponding to the screw root diameter) of the mouth portion 10 of the plastic bottle 1 and the screw thread diameter. However, it is preferable that the dimensions are standardly used for beverage bottles, because the versatility of the existing lid and the sealing property of the beverage bottle can be secured. Therefore, the mouth portion 10 may have a size corresponding to, for example, the PCO1810 standard or the PCO1881 standard.

Further, the mouth portion 10 may be a cap opening, and a cap may be attached to the cap.

The shoulder portion 11 is a connecting portion between the mouth portion 10 and the body portion 12, and is a portion formed in a tapered shape. Providing the peripheral groove 41 in this tapered portion is not preferable in terms of rigidity of the plastic bottle 1, and thus differs from that disclosed in FIG. 1, but the peripheral groove 41 is provided below the shoulder portion 11 and at the upper end of the body portion 12. May be provided. If two circumferential grooves, a circumferential groove 41 and a circumferential groove 42 are provided at the upper end and the lower end of the body portion 12 and pressure absorbing panels 21 and 22 to be described later are provided, the pressure of the smooth portion 30 can be adjusted appropriately. As a result of being able to take a wide area in a rectangular shape, the attachment range of the label 50 as shown in FIG. 3 can be widened, which is suitable for advertisement and brand display. Of course, the arrangement of the circumferential grooves 41 and 42 as shown in FIG. 1 is also preferable.

The body portion 12 is formed in a substantially true cylindrical shape having an inner diameter and an outer diameter that are substantially the same in the vertical direction. Further, the inner diameter and the outer diameter of the body portion 12 may slightly change in the vertical direction. Further, the outer diameter of the body portion 12 can be configured to have substantially the same size above and below the axial direction.

Further, if the pressure absorbing panels 21 and 22 can prevent the deformation of the bottle due to the pressure change in the bottle, the circumferential grooves 41 and 42 may be omitted.

Since the part of the plastic bottle 1 excluding the mouth 10 and a bottom part 13 described later is manufactured by molding using a mold (not shown) divided in two directions, a parting line 71 is formed at the split position of the mold. The parting line 71 may be a fine protrusion or a step. These protrusions and steps are extremely fine as compared with the unevenness due to the pressure absorbing panels 21 and 22, and are of a size that cannot be seen unless the subject is carefully watched. Therefore, in the present invention, the parting line 71 is smooth. And That is, the smoothing portion 30 may have the parting line 71. If the mold is divided at the pressure absorbing panel 21 or 22, that is, if there is a parting line 71 on the pressure absorbing panel 21 or 22, an undercut occurs when the molded plastic bottle 1 is taken out from the mold. It is general that the parting line 71 is not formed on the pressure absorbing panels 21 and 22. Further, although the shape is fine, it is desirable that the parting line 71 is not formed on the front surface of the plastic bottle 1 in terms of appearance. Therefore, in the present embodiment, the mold is divided so that the parting line 71 is formed in the left-right direction of FIGS.

The spacing between the parting lines is generally opposite to that of the plastic bottle 1, that is, it is generally 180 degrees apart in the plastic bottle 1, but on the premise of this, the two parting lines 71 and the pressure absorbing portion 20 are separated. It is desirable that the intervals be evenly spaced. By separating from the end of the pressure absorbing portion 20 at equal intervals, the parting line 71 is located in the smooth portion 30 as shown in FIGS. 2 and 3, but is in a position that does not hinder the display of the smooth portion to the maximum extent. It is possible to secure the display range without unevenness, which is 180 degrees or less, which is preferable.

The position of the parting line is not limited to this, and it may be provided at any position within a range that does not hinder the production and molding of the mold.

The bottom portion 13 has a substantially hemispherical shape that is curved outward. The bottom portion 13 may have a conical shape, a columnar shape with rounded corners, or any other shape.
The body 12 will be further described in detail with reference to FIG. The body 12 has a smooth portion 30 and a pressure absorbing portion 20, and the pressure absorbing portion 20 is provided with a pressure absorbing panel 21 and a pressure absorbing panel 22. The smooth portion 30 will be described with reference to FIG. 2 as well, and refers to the surface on the side not having the pressure absorbing panels 21 and 22 in FIG. 2(X). As shown in FIG. 1 and FIG. 2(X), the smooth portion 30 has no irregularities and is formed in a cylindrical shape. This is intended to display neatly when a label is attached. In FIG. 2(X), the range of the smoothing portion 30 is represented by an angle A of A=240 degrees, but this is an example, and the present invention is not limited to this, and A is 180 degrees to 300 degrees. The degree is preferably, and more preferably A is in the range of 210 to 270 degrees. If the uneven shape is not provided in this range, the pressure can be sufficiently absorbed and the display area of the label 50 can be widened, which is preferable. In the display area of the label 50, A is preferably 160 degrees or more.

Further, the pressure absorbing unit 20 is provided with pressure absorbing panels 21 and 22. The pressure absorption panels 21 and 22 are configured such that the panels are recessed with respect to the body portion 12 of the cylindrical plastic bottle 1. Further, the pressure absorbing panel of the present disclosure has a substantially rectangular shape whose long side in the vertical direction is linear. Although not limited to this shape, it is desirable that at least the long side in the vertical direction is linear from the viewpoint of efficiently absorbing the pressure and widening the label surface. Further, it is preferable that the distance between the pressure absorbing panels 21 and 22 is as small as possible, and it is more preferable that the pressure absorbing panel 21 and the pressure absorbing panel 22 form a corner portion 23. Since the corner portion 23 has an angle of about 120 degrees, it becomes easy to form the storage case 60 shown in FIG. 4 so as to catch on the corner portion 23, and the plastic bottle 1 When the label is used, it is easy to fix the label 50 side (front side) in one direction by the storage case 60, and as a result, the plastic bottle 1 for gifts and the storage case 60 that maintain the brand value and have high commercialability can be obtained. it can. The corner portion 23 is suitable because the angle Z formed by the pressure absorbing panels is 140 degrees or less, because the corner portion 23 is easily caught in the storage case.

FIG. 3 shows the plastic bottle 1 to which the label 50 is attached. As shown in FIG. 3, a label 50 is attached to the smooth portion 30 on the front side, and a pressure absorbing panel portion is provided so as to be connected to the back portion. The material of the label 50 may be a paper label, or the label may be provided on the entire circumference of the container so that the surface without the pressure absorption panel, that is, the portion on which the product name or the like is printed is printed on the smooth portion 30. Good. In this case, it is possible to use not only a sheet-like label but also a shrink label in which a tubular plastic film is attached to the body and heat-shrinked. When used in this way, wrinkles are less likely to appear in the product name portion, and it is suitable for maintaining brand value and improving the product characteristics.

Direct printing may be used as a display means instead of providing the label 50. In this case, silk printing, tampo printing, transfer printing, inkjet printing, and other printing methods can be used.

In addition, it is desirable that the display by the label 50 or other means is provided such that A of the body portion 30 is 160 degrees or more. In this case, a part of the display by the label 50 or other means may be provided on the pressure absorbing panels 21 and 22.

The reason why A is set to 160 degrees or more is as follows. A parting line 71 is formed in the plastic bottle 1 in the left-right direction of FIGS. That is, when the position of the parting line 71 is indicated by the angle A, it is 180 degrees. Although the protrusions and steps due to the parting line 71 are minute, if the display means is a paper label, the label may be easily peeled off at the parting line 71. Alternatively, when the display means is a transfer device, the transfer to the parting line 71 and its surroundings may be difficult. Therefore, it may be desirable to avoid the parting line 71 and display. However, narrowing the display range is outside the scope of the present invention. Therefore, when viewed from the front of the plastic bottle 1, the display range A is set to 160 degrees or more in order to secure the display range as wide as possible and avoid the parting line 71. Of course, depending on the means for displaying and the quality required for the display, the display may be performed across the parting line 71, that is, the display range A may exceed 180 degrees. That is, the display range is preferably 160 degrees or more, and more preferably 160 degrees or more and 175 degrees or less.
In addition, in the present disclosure, the display means that a product name, a logo, and a brand name are printed or attached with a film or a paper label. And this indication means that even if it is stated that "the indication is on the smooth part", if the information related to manufacturing, such as the component information, is attached to the entire circumference by, for example, a shrink film, the pressure It shall also include what is shown in the absorbent panel section.

Such a plastic bottle can be produced by biaxially stretch blow-molding a preform produced by a method such as injection molding or compression molding of a plastic material. As a material for the preform, that is, a plastic bottle, a thermoplastic resin, particularly PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), or the like can be used.

Further, the plastic bottle can be formed as a multi-layer molded bottle having two or more layers. That is, by means such as injection molding or compression molding, for example, the intermediate layer is provided with gas barrier properties such as MXD6, MXD6+ fatty acid salt, PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer) or PEN (polyethylene naphthalate). A multi-layer bottle having a gas barrier property or a light-shielding property may be formed by molding a preform having three or more layers as a resin (intermediate layer) having a light-shielding property and then performing blow molding. In addition, such an intermediate layer is preferably provided at least in the body of the plastic bottle. In addition, it is preferable to provide an intermediate layer in a region of the bottom portion except the central portion of the bottom portion. This is because there is a risk of delamination (delamination) between these parts when the case receives an impact such as dropping. In order to have a gas barrier property and a light shielding property, not only a multilayer but also a blend bottle in which thermoplastic resins are blended may be formed.

Further, a plastic member may be provided outside the preform, and the preform provided with the plastic member may be blow molded to obtain a composite plastic bottle in which the preform and the plastic member are integrated. In this case, a composite bottle having a gas barrier property or a light shielding property can be obtained by using a material having a gas barrier property or a material having a light shielding property for the plastic member.

The present disclosure can be suitably used for various plastic bottles filled with a liquid as contents. However, the present disclosure is not limited to the embodiments and examples described above. The plastic bottle of the present disclosure includes, for example, water, green tea, oolong tea, black tea, coffee, fruit juice, other soft drinks, or seasonings such as soy sauce, sauce, mirin, vinegar, edible oil, foods containing alcohol, etc., detergents. Useful for containing, shampoo, cosmetics, medicines and any other contents. In addition, in the present disclosure, since the display surface can be wide especially in the smooth portion, it is also useful as a plastic bottle for gifts.

10 Mouth 11 Shoulder 12 Body 13 Bottom 20 Pressure Absorbing Parts 21, 22 Pressure Absorbing Panels 41, 42 Circumferential Groove 50 Label 60 Storage Case

Claims (4)

In a plastic bottle having a mouth portion, a shoulder portion, a body portion, and a bottom portion, and the body portion is a cylindrical shape, the body portion includes a smooth portion and a pressure absorbing panel portion, and the smooth portion is the body portion of the body portion. A plastic bottle having a cylindrical shape with no irregularities in a range of 180 to 300 degrees around the circumference, and at least one pressure absorbing panel is provided in the pressure absorbing panel section. The plastic bottle according to claim 1, wherein the two pressure absorbing panels are provided side by side in the circumferential direction in the pressure absorbing panel section. The plastic bottle according to claim 1, wherein the smooth portion is marked. A circumferential groove is provided over the entire circumference of the body above the pressure absorbing panel, and the circumferential groove is also provided over the entire circumference under the pressure absorbing panel. The plastic bottle according to 1 to 3.

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