WO2018164111A1

WO2018164111A1 - Aseptic filling bottle

Info

Publication number: WO2018164111A1
Application number: PCT/JP2018/008551
Authority: WO
Inventors: 北垣歩武; 伊藤真也; 秋山高志
Original assignee: サントリーホールディングス株式会社
Priority date: 2017-03-07
Filing date: 2018-03-06
Publication date: 2018-09-13
Also published as: JP2018144862A; US20200055629A1; AU2018232270A1; CN110461719B; CN110461719A; JP7241456B2; EP3594142A4; EP3594142A1; AU2018232270B2

Abstract

In this aseptic filling bottle, even buckling of a bottom part due to frozen storage is suppressed. The bottom part (6) of the aseptic filling bottle has: a grounding part (10) which is grounded to an installation surface; a middle part that protrudes into the bottle progressively from the grounding part (10) toward the inside in the radial direction; a dome part (13) provided in the central section of the middle part and protruding more inside the bottle than the middle part; and a recessed groove part (14) that extends radially from the dome part (13). The present invention is formed so that a protrusion height (D1) of the dome part side peripheral edge section of the middle part toward the inside of the bottle is greater than a half (D2) of the height from the grounding part (10) to the boundary between a body part and the bottom part (6), and the depth (D3) of the recessed groove part (14) at a position corresponding to the center position in the radial direction of the grounding part (10) is 5.0 to 10.0 mm.

Description

Aseptic filling bottle

The present invention relates to an aseptic filling bottle having a mouth, a shoulder, a trunk, and a bottom.

As a liquid filling method for plastic bottles, there is an aseptic filling method in which the bottle is filled with liquid in an aseptic condition. According to this aseptic filling method, the plastic bottle is not exposed to high temperatures. For this reason, plastic bottles filled by the aseptic filling method (hereinafter referred to as aseptic filling bottles) may have low heat resistance, and thus can be made thin and lightweight bottles.

However, if the bottle is made thinner and lighter, there is a problem that the strength decreases accordingly. For this reason, for example, when carbonated drinking water is filled inside, the internal pressure rises due to the release of carbonic acid inside, and the bottom may be reversed (buckle). If buckling occurs, the bottle cannot be made independent and cannot be distributed as a product. In order to solve this problem, Japanese Patent Application Laid-Open No. 2012-140156 (Patent Document 1) discloses a bottle that suppresses the buckling of the bottom by providing a dome-shaped recess that retracts inward at the center of the center of the bottom. Proposed.

JP 2012-140156 A

¡Plastic bottles filled with contents may be stored not only at room temperature or refrigerated, but also warmed or frozen by warming or freezing the contents. However, when warming or freezing, the contents expand due to warming or freezing, which causes a problem of buckling at the bottom. Moreover, when a structure like patent document 1 is employ | adopted, there also existed a problem that weight reduction was difficult.

Therefore, it is desired to realize an aseptic filling bottle that can suppress buckling of the bottom portion even by warm storage or frozen storage.

Aseptic filling bottle according to the present invention,
An aseptic filling bottle comprising a mouth, a shoulder, a trunk and a bottom,
The bottom portion is provided on a grounding portion that is grounded with respect to an installation surface, a central portion that protrudes into the bottle as it goes radially inward from the grounding portion, and a central portion that is provided at a central portion of the central portion. A dome part that rushes into the inside of the bottle, and a concave groove part extending radially from the dome part,
The height of entry into the bottle inside the dome side peripheral edge of the central part is formed in a state where it is higher than half of the height from the ground contact part to the boundary between the trunk part and the bottom part,
The depth of the concave groove portion corresponding to the center position in the radial direction of the ground contact portion is 5.0 mm to 10.0 mm.

The inventor does not make the center part into a dome shape with its center protruding into the inside of the bottle, but keeps the dome shape at the center while maintaining the entire center part from the peripheral part of the dome part to the grounding part. It has also been found that the strength of the bottom of the bottle can be further enhanced by adopting a configuration that enters the inside of the bottle as it goes radially inward. The inventor further increases the maximum entry height of the central portion, i.e., the entry height to the inside of the bottle at the peripheral edge of the dome-shaped portion, so that the strength is higher than half the height of the bottom portion. It was also found that the effect of strengthening can be further enhanced.

And according to this structure, while making the shape which the inventor found out, ie, a center part, it is the shape which rushes into a bottle inner side as it goes to a diameter direction inner side from a grounding part, and the bottle inner side in the peripheral part of a dome-shaped part Since the entry height is higher than half the height of the bottom (that is, the height to the boundary between the trunk and the bottom), the strength of the bottom can be effectively increased. Thereby, the buckling of the bottom part in frozen storage can be suppressed effectively.

Then, the strength of the bottom can be reinforced by the concave groove formed radially from the central portion, and the depth of the position corresponding to the central position in the radial direction of the grounding portion of the concave groove is 5.0 mm to 10. Since it is 0 mm, the strength of the bottom can be further reinforced, and even the contents that are easily expanded by freezing can effectively suppress the buckling of the bottom. Furthermore, by setting this depth, even when the container is heated, buckling at the bottom can be suppressed.

Hereinafter, preferred embodiments of the aseptic filling bottle according to the present invention will be described. However, the scope of the present invention is not limited by the preferred embodiments described below.

As one aspect, it is preferable that the central portion is formed in an arc shape.

According to this configuration, by forming the shape of the central portion that enters the inside of the bottle into an arc shape, the central portion is applied to the central portion as compared with the case where the central portion is formed in a straight line from the grounding portion to the dome portion side peripheral portion. Since the pressure is made uniform, the strength of the bottom can be increased more effectively. Thereby, the buckling of the bottom part in frozen storage can be suppressed more effectively.

As one aspect, it is preferable that the concave groove portion extends from the dome portion to a peripheral portion radially outward from the grounding portion.

According to this configuration, since the concave groove portion that reinforces the strength of the bottom portion is formed long from the dome portion to the peripheral portion, the strength of the bottom portion can be further reinforced.

As one aspect, it is preferable that the body portion is formed with at least one concave rib that circulates around the peripheral surface thereof.

According to this configuration, the volume expansion of the contents in the frozen storage can be absorbed to some extent by the concave rib provided in the body portion, so that the force applied to the appropriate part by the volume expansion can be reduced, and the frozen storage The buckling of the bottom part can be effectively suppressed.

Front view of aseptic filling bottle Bottom view of the bottom of an aseptic bottle III-III sectional view in FIG. IV-IV sectional view in Fig. 2

Embodiments of an aseptic filling bottle according to the present invention will be described with reference to the drawings. The aseptic filling bottle 1 according to this embodiment includes a mouth portion 2, a shoulder portion 4, a trunk portion 5, and a bottom portion 6. The bottom portion 6 includes a grounding portion 10 that is grounded with respect to the installation surface, a central portion 12 that enters the inside of the main body from the grounding portion 10 toward the central portion of the bottom portion 6, and a central portion that is provided at the central portion of the central portion 12. The dome portion 13 further enters the bottle from the portion 12 and the concave groove portion 14 extending radially from the dome portion 13. In the central portion 12, the height D1 of the central portion 12 entering the bottle inside the dome side peripheral edge portion 12a is higher than a half D2 of the height from the grounding portion 10 to the boundary between the trunk portion 5 and the bottom portion 6. It is formed with. The depth D3 of the concave groove portion 14 corresponding to the center position in the radial direction of the ground contact portion 10 is 5.0 mm to 10.0 mm. Thereby, the buckling of the bottom part in frozen storage can be suppressed effectively. Hereinafter, the aseptic filling bottle 1 according to the present embodiment will be described in detail.

As shown in FIG. 1, an aseptic filling bottle (hereinafter simply referred to as a bottle) 1 according to the present embodiment includes a mouth portion 2 as a liquid spout and a bottle body portion 3 filled with a liquid. The bottle body 3 includes a shoulder 4, a body 5, and a bottom 6. The shoulder portion 4 is a portion that gradually increases in diameter toward the bottom surface continuous with the mouth portion 2, and has a shape obtained by combining polygonal panels having various shapes. The trunk 4 is a cylindrical part that is continuous with the shoulder 3.
The bottom portion 5 is a portion of the bottle body portion 3 that gradually decreases in diameter toward the bottom surface of the bottle body portion 3. That is, in this embodiment, the position of the boundary between the body part 5 and the bottom part 6 is a position in the height direction in which the bottle main body part 3 starts to shrink in diameter toward the bottom surface.

Here, the bottle 1 according to the present embodiment is a bottle used in an aseptic (sterile) filling method in which a liquid is filled into the bottle in a sterile state. According to the aseptic filling method, the plastic bottle does not have to be exposed to a high temperature, and therefore the bottle 1 may have low heat resistance, and thus is a thin bottle with a small thickness. The bottle 1 can be integrally molded by a stretch molding method such as biaxial stretch blow molding using a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate as a main material.

Since the bottle 1 according to the present embodiment is configured to withstand the expansion of the filling when the filled liquid is frozen as will be described later, the contents to be filled in the bottle 1 are, for example, minerals Non-carbonated beverages that can be stored frozen, such as water, tea, soft drinks, or fruit juices, are particularly suitable. However, it can also be suitably used for foods such as carbonated drinks and sauces.

The body part 5 is a straight body type, and the body part 5 is formed with a plurality of concave ribs 7 that circulate around the peripheral surface thereof. The concave rib 7 has a concave shape on the inner side in the radial direction (the direction toward the central axis X of the bottle 1 and along the horizontal direction), and the width and depth of each concave rib 7 are substantially the entire circumference. It is formed uniformly. These concave ribs 7 function as reinforcing ribs that reinforce the side strength of the bottle 1, and also function as a portion that absorbs the volume expansion of the content liquid during frozen storage by stretching the bottle 1 in the vertical upward direction.

It should be noted that at least one concave rib 7 may be formed at least in any position of the body portion 5, and preferably two or more concave ribs 7 may be formed on the body portion 5. More preferably, at least one is formed at the lower part of the body part, and a plurality is formed at the upper part of the body part. If at least one bottle is formed at each of the lower part of the body and the upper part of the body, the volume expansion of the inner solution at the time of freezing can be easily extended vertically upward of the bottle 1, so that the bottle 1 is straight and freestanding without tilting. Yes, and there is no deformation or rupture of the bottle. Moreover, as shown in FIG. 1, the concave rib 7 should just be a concave shape inside radial direction, and the concave shape should just be formed over the perimeter.

As shown in FIGS. 1 to 4, the bottom portion 6 has an annular grounding portion 10 that is grounded to an installation surface such as a desk, and further, a peripheral portion 11 that is a portion radially outside the grounding portion 10. And a central portion 12 that is a radially inner portion with respect to the grounding portion 10 and a dome portion 13 that is provided at the central portion of the central portion 12 and further enters the bottle inside the central portion 12. The central portion 12 is formed in a shape that enters the inside of the bottle 1 (upward in FIG. 1) as it goes radially inward from the ground contact portion 10, and is formed in an arc shape from the ground contact portion 10 to the dome portion 13. Further, as shown in FIG. 3, the central portion 12 has a dent height D1 from the grounding portion 10 to the boundary 6 a between the trunk portion 5 and the bottom portion 6 at the dome side peripheral edge portion 12 a of the central portion 12. It is formed in a state where it is higher than half of the height D2. Moreover, the dome part 13 is formed in the shape used as a trapezoid in the longitudinal cross-sectional view.

A plurality of (eight in this embodiment) concave groove portions 14 extending from the dome portion 13 to the peripheral edge portion 11 are formed in the bottom portion 6 radially from the dome portion 13 at equal intervals. The strength of the bottom portion 6 is reinforced by the concave groove portion 14. By this concave groove portion 14, the grounding portion 10, the peripheral edge portion 11, and the central portion 12 are divided into a plurality (in this embodiment, eight) in the circumferential direction (the direction around the central axis X of the bottle 1). . As shown in FIG. 4, the end 14 a on the peripheral edge 11 side of each concave groove 14 extends to a boundary 6 a between the body 5 and the bottom 6. Further, it is preferable that the depth D3 of the concave groove portion 14 corresponding to the central position in the radial direction of the ground contact portion 10 is 5.0 mm to 10.0 mm (6.6 mm in the present embodiment). This is because if the thickness is 10.0 mm or more, the bottle 1 may become too deep and the appearance of the bottle 1 may be damaged, or the design of other parts may need to be changed.

Thus, in the bottle 1, not only the dome portion 13 is formed at the center portion of the bottom portion 6, but the entire central portion 12 from the dome portion 13 to the grounding portion 10 also enters the inside of the bottle as it goes radially inward. The configuration is such that the height of the dome-side peripheral edge 13a entering the bottle inside is higher than half the height of the bottom 6, and the arcuate shape from the grounding part 10 to the dome-side peripheral part 13 By forming, the strength of the bottom 6 is effectively increased. Further, the strength of the bottom portion 6 is reinforced by the concave groove portion 14 extending from the dome portion 13 to the peripheral edge portion 11. Thereby, the intensity | strength which can suppress the buckling of the bottom part 6 by the volume expansion of the contents by freezing preservation | save is ensured.

Table 1 below shows a comparison of the results of three tests on a conventional bottle and the bottle 1 according to the present embodiment. Unlike the bottle 1 according to the present embodiment, the conventional bottle is a portion corresponding to the depth D3 (the depth of the concave groove portion 14 corresponding to the center position in the radial direction of the grounding portion 10) shown in FIG. The depth is 5 mm or less.

As is clear from Table 1, the bottle 1 according to the present embodiment is more stable at a filling amount of 650 ml and a large-capacity bottle, which means that buckling of the bottom 6 is suppressed. Thus, in the bottle 1 which concerns on this embodiment, it turns out that the intensity | strength which can suppress the buckling of the bottom part 6 by the volume expansion | swelling of the content by freezing preservation | save (further heating preservation | save) is securable.

[Other Embodiments]
Finally, other embodiments of the aseptic filling bottle according to the present invention will be described. Note that the configurations disclosed in the following embodiments can be applied in combination with the configurations disclosed in other embodiments as long as no contradiction arises.

(1) In the above embodiment, the example in which the body portion 5 is configured as a straight body type has been described. However, the embodiment of the present invention is not limited to this. For example, it is good also as a structure with which the trunk | drum 5 was provided with the constriction part etc. in addition to the straight trunk | drum part.

(2) In the above embodiment, a concave small groove portion smaller than the concave groove portion 14 may be formed between the concave groove portions 14 from the grounding portion 10 to the peripheral edge portion 11. Thereby, the strength of the bottom can be further reinforced.

(3) Regarding other configurations, it should be understood that the embodiments disclosed herein are illustrative in all respects and that the scope of the present invention is not limited thereby. Those skilled in the art will readily understand that modifications can be made as appropriate without departing from the spirit of the present invention. Accordingly, other embodiments modified without departing from the spirit of the present invention are naturally included in the scope of the present invention.

The present invention can be used, for example, for a plastic bottle that is filled with a content liquid by an aseptic filling method.

DESCRIPTION OF SYMBOLS 1 Aseptic filling bottle 2 Mouth part 4 Shoulder part 5 Trunk part 6 Bottom part 7 Concave rib 10 Grounding part 11 Peripheral part 12 Center part 13 Dome part 14 Concave groove part D1 The penetration | invasion height inside the bottle in the dome part side peripheral part of a center part D2 Height half of the height from the grounding part to the boundary between the trunk part and the bottom part D3 Height of the position corresponding to the center position of the concave groove part in the radial direction of the grounding part

Claims

An aseptic filling bottle comprising a mouth, a shoulder, a trunk and a bottom,
The bottom portion is provided on a grounding portion that is grounded with respect to an installation surface, a central portion that protrudes into the bottle as it goes radially inward from the grounding portion, and a central portion that is provided at a central portion of the central portion. A dome part that rushes into the inside of the bottle, and a concave groove part extending radially from the dome part,
The height of entry into the bottle inside the dome side peripheral edge of the central part is formed in a state where it is higher than half of the height from the ground contact part to the boundary between the trunk part and the bottom part,
An aseptic filling bottle in which a depth of a position corresponding to a center position in a radial direction of the ground contact portion of the concave groove portion is 5.0 mm to 10.0 mm.
The aseptic filling bottle according to claim 1, wherein the central portion is formed in an arc shape.
The aseptic filling bottle according to claim 1 or 2, wherein the concave groove portion extends from the dome portion to a peripheral portion on a radially outer side from the grounding portion.
The aseptic filling bottle according to any one of claims 1 to 3, wherein the barrel portion is formed with at least one concave rib that circulates around a circumferential surface thereof.