JP2001206331A - Plastic bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat filling bottle on which the number of faces of a bottle body section is increased for the purpose of easily looking at the design of a packaging film and a printed content thereof and setting the vacuumized absorption volume similar to the volume of hexahedron bottles heretofore available. SOLUTION: An octahedron plastic bottle is used as a plastic bottle for heat filling having vacuumized recessed faces, a body section with a section of an octagonal shape and respective corners with arc wall faces and vacuumized pressure recessed faces formed of inclined walls and flat walls between respective arc wall faces, and the pillar angle of the inclined walls connected with both sides of the arc wall faces is formed in the range of 60-115 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic bottle, and more particularly to a plastic bottle for heating and filling a content liquid.

[0002]

2. Description of the Related Art A plastic bottle having a reduced pressure absorbing surface formed on a body for heating and filling a beverage is conventionally known, and a hexahedral bottle having a rounded corner at the body is commercially available. .

[0003]

However, in the conventional hexahedral bottle described above, if the peripheral wall is wrapped with a shrink label, the peripheral surface of the label is divided into six parts, and the projected area of the label is reduced by the label area. In contrast, it is smaller. If the printed surface of the label is divided into two surfaces, the display contents can be viewed in a panoramic view of the printed surface when viewed from the direction of the radiation passing through the center of the printed surface. This makes it difficult to see the printed surface of the printer, and there is a problem that the container must be turned to view the printed content.

It is conceivable that the hexahedron is made closer to a circle and the number of face bodies is increased in order to freely take the design surface and make the printed contents easier to see. However, if the number of faces is increased, the area of the decompression absorption surface increases accordingly. Therefore, it cannot be used for a hot-filled bottle due to high temperature, and a hexagonal bottle is considered to be the limit as a polyhedral bottle.

[0005] In view of the above problems, the present invention increases the number of surfaces of the bottle body and reduces the amount of reduced pressure absorption in the same manner as a conventional hexahedral bottle in order to make the design and printed contents of the packaging film easier to see. It is an object of the present invention to provide a heat-filled bottle.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a plastic bottle having a reduced-pressure absorbing surface, wherein the bottle body has an octagonal cross section and an arc-shaped wall at each corner. A heat-fillable octahedral bottle in which a decompression absorption surface consisting of an inclined wall and a flat wall is arranged between each arc wall surface, and a column angle formed by the inclined walls connected to both sides of the arc wall surface. , 60 ° to 115 °.

In order to reinforce the reduced-pressure absorbing surface, a configuration is adopted in which a concave or convex rib having an arc-shaped cross section is provided on a flat wall.

[0008]

Next, a first embodiment of the present invention will be described with reference to the drawings. In FIG. 1, A denotes a bottle, which is an octahedral bottle that is stretch blow-molded using PET or another synthetic resin and can be filled with a content liquid by heating. The bottle A has a mouth 1 and a shoulder 2 and a body 3 and a bottom 4 having an octagonal cross section. A screw 5 is screwed around the mouth 1 and a neck ring 6 is provided below the screw 5. It is protruding.

A horizontal rib 7 is provided at the boundary between the body 3 and the shoulder 2, and the lower side is a narrow circumferential surface 8,
A horizontal rib 9 is provided at a boundary between the body 3 and the bottom 4, and the upper side thereof is a narrow circumferential surface 10. The body 3 between the circumferential surface 8 and the circumferential surface 10 has an octagonal cross section,
At each corner, an arc-shaped wall surface 11 that connects the circumferential surface 8 and the circumferential surface 10 and extends in the axial direction is formed, and a decompression absorption surface 12 is formed between all adjacent arc-shaped wall surfaces 11. I have.

As shown in FIG. 2, the decompression absorbing surface 12 includes side edges 13 of adjacent arc-shaped wall surfaces 11 and upper and lower circumferential surfaces 8 and 10.
To the inclined wall 14 and the inner side edge 1 of the inclined wall 14.
Slightly curved flat wall 1 connected to 5a, b, c, d
It consists of six. The flat wall 16 may be a flat wall surface together with a slightly curved wall surface. The flat wall 16 is provided with a rib 17 whose upper and lower sides are arcs and whose cross-section is formed by two sides extending in the vertical direction.

The bottom 4 comprises a bottom peripheral wall 20 following the horizontal rib 9, a bottom end wall 21, and a bottom wall 22 recessed upward from the bottom end wall 21. A transverse rib 23 is provided in the middle of the bottom peripheral wall 20, and a plurality of known radial reinforcing ribs are provided on the bottom wall 22.

Next, details of the structure of the arcuate wall surface 11 and the reduced pressure absorbing surface 12 of the body 3 and the operation and effect based thereon will be described with reference to FIG. The arc wall surface 11 and the inclined walls 14a and 14b on both sides thereof form a column for enhancing the rigidity of the body 3, and the angle formed by the two inclined walls 14a and 14b forms a column angle α. In the present embodiment, the column angle α is in the range of 60 ° to 115 °, preferably 75 ° or more.

The bottle of this embodiment is molded as a container for a capacity of 500 ml using a resin weight of 32 g or less, and the diameter D of the arcuate wall surface 11 which is the same as the diameter of the bottle body or the arc wall surface is 68 mm. The width w of 11 is 5.
35 mm, the distance W between the arc-shaped wall surfaces 11 is 21 mm, and the distance between the circumferential surface of the arc-shaped wall surface 11 and the flat wall 16 is 2.99 m.
m.

The dimensional values of each part of the bottle body are one embodiment, and the numerical values can be changed according to changes in the capacity, design, and diameter of the bottle. When the value is expressed in relation to the diameter D, W = 1 / 3.5 to 1 / 2.8D,
H = 1/25 to 1 / 15D, w = 1 to 6 mm
In the range. For a conventional hexahedral body,
The column angle α is in the range of 0 to 45 ° and the reduced pressure absorption amount is 30c
c, but in the embodiment, the column angle α is increased,
By setting the angle in the range of 60 ° to 115 °, in particular, 75 ° or more, the rigidity of the pillar portion was obtained, and the same amount of reduced pressure absorption as the hexahedral bottle could be secured.

Further, the ribs 17 are provided on the flat wall 16 so that the flat wall 16 is stabilized during molding, so that a good molding surface can be obtained. Further, the inclined wall 14 is reinforced together with the flat wall 16. The rigidity of the pillar portion is enhanced by reinforcing the inclined wall 14.

Next, the operation and effect of the present invention will be described with reference to test examples. [Test Example] Using PET as a raw resin, a formed preform having a resin weight of 32 g was biaxially stretch blow-molded to form an octahedral PET bottle having a total internal volume of 529 ml.
The dimensions are as follows: diameter D = 68 mm, H = 2.99 mm, W =
21 mm, w = 5.35 mm, and the column angle is 15 °,
Five kinds of test bottles of 40, 60, 75, and 95 mm were prepared.

After each test bottle is given the same thermal conditions as the actual filling, it is filled with water to the full amount, the mouth is sealed and sealed, and then the content is reduced by a fixed amount with an injection needle or the like. Then, the limit capacity (decompression absorption amount) at which the column part could maintain its shape was measured. The results are as shown in Table 1 and are shown in FIG. 4 in a graph.

[0018]

[Table 1]

From the test results, it can be seen that when the column angle α is 75 ° or more, the rigidity of the column portion is strengthened, and a reduced pressure absorption equivalent to that of a hexahedron can be obtained.

It can be seen from the graph that when the column angle α is 115 °, the reduced pressure absorption increases more than when the column angle α is 75 °. In the case of 60 °, the test results show that it is slightly inferior to 75 ° but only reduced by about 10% and can be used as a reduced pressure absorbing surface.

In the test sample, H, W, and w have specific dimensions, but H = 1/25 to 1/15 with respect to the diameter D.
When D and W are in the range of 1 / 3.5 to 1 / 2.8D, it is possible to obtain a weight loss absorption amount substantially equal to the above test results.

In the above-described embodiment, an octahedral bottle has been described. However, the bottle body may be a heptahedral bottle or a nine-hedral bottle. In addition, by applying to a hexahedral bottle, the amount of reduced pressure absorption can be increased as compared with the conventional one.

[0023]

The present invention has the following effects because it is configured as described above. By setting the column angle in the range of 60 ° to 115 ° in the octahedral bottle, the reduced pressure absorption amount equivalent to that of the hexahedral bottle was secured, and the rigidity of the column portion could be enhanced. As a result, the projection area of the print surface of the shrink label can be increased, and the print surface of the label can be easily seen.

[Brief description of the drawings]

FIG. 1 is a front view of the bottle of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged explanatory view of a reduced pressure absorption surface.

FIG. 4 is a graph of a reduced pressure absorption surface.

[Explanation of symbols]

 A container α pillar angle 1 mouth 3 mouth 7, 9 horizontal rib 8, 10 circumferential surface 11 circular wall surface 12 decompression absorption surface 14 inclined wall 16 flat wall

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaaki Sasaki 310, Minorudai, Matsudo-shi, Chiba Matsuno Plant, Yoshino Industry Co., Ltd. (72) Inventor Hiroaki Sugiura 3-2-6 Oshima, Koto-ku, Tokyo Yoshino Kogyo Co., Ltd. In-house (72) Inventor Takao Iizuka 3-2-6 Oshima, Koto-ku, Tokyo Yoshino Kogyo Co., Ltd. (72) Inventor Hiroshi Uchida 310 Yoshino Kogyo Co., Ltd. Matsudo Plant in Yoshino Kogyo Co., Ltd. (72) Inventor Tadakazu Nakayama 310 Minorudai, Matsudo-shi, Chiba F-term in the Matsudo factory of Yoshino Industry Co., Ltd. (Reference) 3E033 AA01 BA18 CA02 CA05 DA03 DB01 DC10 DD05 EA04 EA06 FA03 GA02

Claims (2)

[Claims] 1. A heat-fillable bottle having a bottle body having an octagonal cross section, an arc-shaped wall formed at each corner, and a reduced-pressure absorbing surface comprising an inclined wall and a flat wall disposed between each arc-shaped wall. Octahedral bottle, the angle of the column formed by the inclined wall connected to both sides of the arc wall is 6
A plastic bottle having a reduced pressure absorbing surface, wherein the plastic bottle has a range of 0 ° to 115 °. 2. The plastic bottle according to claim 1, wherein concave or convex ribs having an arc-shaped cross section are provided on the flat wall.