JP2002332022A - Biaxial drawing blow molding container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biaxial drawing blow molding container in which even if a bottle has a small volume, its deformation is absorbed without reduction of its strength, its outer appearance is superior and a pressure reducing panel is miniaturized. SOLUTION: There is provided a biaxial drawing blow molding container in which an annular groove is formed at a circumferential wall, a lateral rib is cooperatively arranged below the annular groove, and an upper end of a reduced pressure reducing panel formed below the lateral rib is formed substantially adjacent to the lateral rib. With such an arrangement as above, it is possible to improve a rigidity caused by the lateral rib, restrict a deformation of a column-like segment and keep a large space at a barrel segment of the container where a label can be adhered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biaxially stretched blow-molded container, and more particularly, to a vacuum-absorbing panel for filling a fruit juice, oolong tea or the like in a heated state and then reducing the deformation of the container caused by decompression accompanying cooling. The present invention relates to a biaxially stretch blow-molded container that absorbs in consideration of a structure or a position.

[0002]

2. Description of the Related Art Conventionally, a biaxially stretch blow-molded container of a thermoplastic polyester such as polyethylene terephthalate (PET) has excellent transparency and surface gloss, impact resistance, gas barrier properties, and the like. Widely used as containers for various beverages. This biaxially stretch blow molded container is
Most of them are relatively large round bottles with a capacity of 1.5 to 2 liters, and their usage is such that fruit drinks, oolong tea and other beverages are heated to about 90 ° C., and then filled into the blow-molded container, The lid is capped and sealed, then cooled and returned to room temperature before shipping. This round bottle expands after filling and sealing, and then shrinks and deforms due to reduced pressure inside the bottle during cooling,
As shown in FIG. 5, the annular groove b formed in the peripheral wall a, provided with a plurality of vacuum panels d having a length L ₂ which occupies a large ratio to the length L ₁ of the bottle body portion c at its lower At the same time, a column e is formed between them, and the reduced pressure absorbing panel d absorbs the shrinkage deformation. As a method for filling the beverage, there is also an aseptic filling method. However, after filling oolong tea or the like, the pressure in the container tends to be reduced, and similarly, the molded container absorbs shrinkage deformation.

[0003]

Since the conventional biaxially stretched blow-molded container is a relatively large-capacity round bottle containing 1.5 to 2 liters, it shrinks under reduced pressure during cooling after filling and sealing. The deformation is absorbed by the plurality of reduced-pressure absorbing panels having the above configuration, and there is no particular problem in appearance due to the deformation. However, recently, the demand for a biaxially stretched blow-molded container having a small capacity, that is, a small capacity of about 200 to 900 ml has been increased, the production amount has been increased, and deformation due to decompression due to cooling after heat sterilization and expansion has become noticeable. became.

[0004] This deformation has a problem that the reduced-pressure absorbing panel d is deformed in a concave shape, and in particular, the straight column portion e is deformed in a concave shape, so that the appearance is remarkably reduced and the strength is also lowered. This is because even in the case of a biaxially stretched blow-molded container having the same structure, if the container has a large capacity, the amount of reduced pressure after expansion after filling and sealing is relatively small, and the current reduced-pressure absorption panel d is deformed into a concave shape. In contrast, when the capacity is small, the reduced pressure amount becomes relatively large, and the absorption cannot be performed by the current reduced pressure absorption panel d.

Therefore, the thickness of the container cannot be reduced in order to improve the rigidity of the body, so that the container has to be formed using many materials. When the capacity of the round bottle is reduced, the amount of decompression absorption is increased. To increase the length of the decompression absorption panel d in the axial direction with respect to the bottle body c, the contents of the body of the round bottle are reduced. And the space for attaching a label for enhancing the product value is reduced, which causes inconvenience.

Accordingly, it is an object of the present invention to improve the appearance by absorbing deformation without causing a decrease in strength even with a small capacity, and to enable molding with a smaller amount of material. An object of the present invention is to provide a biaxially stretch blow-molded container in which a space for labeling is sufficiently ensured by reducing the size of a panel.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above object, and has the following configuration. That is, according to the present invention, in a biaxially stretched blow-molded container having an annular groove formed on the peripheral wall, a horizontal rib is connected below the annular groove, and the upper end of the decompression absorption panel formed below the horizontal rib is formed. A biaxially stretch blow-molded container is provided, formed substantially adjacent to the transverse rib.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a biaxially stretch blow-molded container showing an example of an embodiment of the present invention.
FIG. 2 is a side sectional view showing a part of a half section of FIG. 1. The blow-molded container 1 has an annular groove 3 formed in its peripheral wall 2, a horizontal rib 4 is connected below the annular groove 3, and the upper end 5 a of the reduced-pressure absorption panel 5 formed below the horizontal rib 4 is formed with a horizontal rib. 4
Are formed substantially adjacent to. FIG.
It is sectional drawing which follows the XX line of FIG.

The reduced-pressure absorption panel 5 is formed in a concave shape, and a column 11 is formed between the reduced-pressure absorption panel 5 and the reduced-pressure absorption panel 5. It is important that the decompression absorption panel 5 has its upper end 5a substantially adjacent to the lateral rib 4.
Thereby, the rigidity can be improved by the lateral ribs 4. In addition, since there is no peripheral wall formed above the decompression absorption panel 5 which has conventionally been deformed during cooling after sealing and affected the deformation of the column 11, the deformation of the column 11 during the cooling is not present. The effect of reducing the number can also be obtained. It is preferable that another horizontal rib 10 is also adjacent to the lower end 5b of the decompression absorbing panel 5, whereby the rigidity of this portion is also improved by the horizontal rib, and the column 11 during cooling is formed. Less deformation.

Also, as shown in FIG. 1, the axial length of the reduced-pressure absorbing panel 5 is shortened by the above-described effect, and the axial length of the peripheral wall 2 on which the label is attached can be increased. The space for attaching a label for PR or the like to the blow-molded container 1 can be increased.

While the present invention has been described with reference to the drawings, any combination of these configurations or obvious configurations in the bottle may be included in the technical scope of the present invention without departing from the spirit of the present invention. It should be understood that

[0012]

According to the container of the present invention, not only a large-capacity container but also a small-capacity container can absorb the deformation at the time of decompression without lowering the strength, and has a good appearance. Since the absorption panel can be made smaller, it becomes easier to attach a label, and the commercial value can be increased. In addition, since the rigidity of the body is improved, the thickness of the container can be reduced, so that the target container can be formed with a smaller amount of material than the conventional one.

[Brief description of the drawings]

FIG. 1 is a side view of a biaxially stretch blow-molded container showing an example of an embodiment of the present invention.

FIG. 2 is a side sectional view showing a part of a half section of FIG. 1;

FIG. 3 is a cross-sectional view taken along line XX of FIG.

FIG. 4 is a side view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Biaxial stretch blow-molded container 2, a peripheral wall 3, b annular groove 4, 10 horizontal rib 5, d decompression absorption panel 5a upper end 5b lower end 11, e pillar

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E033 AA02 BA13 BA18 CA05 DA03 DB01 DC03 DD03 FA03 GA02 4F202 AG07 AG22 AG26 AG28 AH55 AM32

Claims (1)

[Claims] 1. A biaxially stretch blow-molded container having an annular groove formed in a peripheral wall thereof, wherein a horizontal rib is connected below the annular groove, and an upper end of a reduced-pressure absorbing panel formed below the horizontal rib is the horizontal rib. A biaxially stretch blow-molded container formed substantially adjacent to the container.