JP3729148B2 - Biaxial stretch blow molded container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a biaxially stretched blow-molded container, and more specifically, the deformation of the container caused by the decompression accompanying cooling after filling with heated fruit juice, oolong tea, etc. Relates to a biaxially stretched blow molded container.
[0002]
[Prior art]
Conventionally, biaxial stretch blow molded containers of thermoplastic polyester such as polyethylene terephthalate (PET) have excellent transparency and surface gloss, impact resistance, gas barrier properties, etc., and containers for various beverages As widely used. Most of these biaxially stretched blow molded containers are relatively large round bottles with a capacity of 1.5 to 2 liters, and the usage is after heating various beverages such as fruit juice and oolong tea to around 90 ° C. The blow molded container is filled, the lid is capped and sealed, and then cooled and returned to room temperature before shipping. This round bottle expands after filling and sealing, and then shrinks and deforms when the inside of the bottle is depressurized during cooling. Therefore, as shown in FIG. 4 , an annular groove b is formed in the peripheral wall a and below it. A plurality of reduced pressure absorption panels d having a length L ₂ occupying a large ratio with respect to the length L ₁ of the bottle body c are provided, and a column portion e is formed between them, and the reduced pressure absorption panels d Absorbs shrinkage deformation.
As a method for filling the beverage, an aseptic filling method also exists. However, oolong tea or the like tends to be depressurized after filling, and similarly, the molded container absorbs shrinkage deformation.
[0003]
[Problems to be solved by the invention]
The conventional biaxially stretched blow-molded container is a relatively large-capacity round bottle containing 1.5 to 2 liters. It was absorbed by the absorbent panel, and there was no particular problem in the appearance of appearance due to deformation. Recently, however, the demand for a biaxially stretched blow-molded container having a small volume, that is, a small volume of about 200 to 900 ml has increased, and the production volume has increased. became.
[0004]
This deformation has the problem that the vacuum absorbing panel d is deformed into a concave shape, and particularly the straight columnar portion e is deformed into a concave shape, so that the appearance is remarkably lowered and the strength is also lowered. This is because even if it is a biaxially stretched blow molded container having the same structure, if the capacity is large, the amount of decompression after expansion after filling and sealing is relatively small, and the current decompression absorbing panel d is deformed into a concave shape. In the case of a small capacity, the amount of decompression becomes relatively large, and the current decompression absorption panel d cannot absorb.
[0005]
Therefore, since the thickness of the container cannot be reduced in order to improve the rigidity of the trunk, it has been necessary to form the container using many materials.
When the round bottle has a small capacity, the vacuum absorption amount is increased. Therefore, when the axial length of the vacuum absorption panel d is increased with respect to the bottle barrel c, the contents of the round bottle barrel are contained. The space for attaching the label for increasing the display and the commercial value is reduced, resulting in inconvenience.
[0006]
Accordingly, an object of the present invention is to absorb deformation without causing a decrease in strength even with a small capacity, which is good in appearance, can be molded with a smaller amount of material, and has a reduced vacuum absorbing panel. The purpose of this is to provide a biaxially stretched blow molded container in which a sufficient space for labeling is secured.
[0007]
[Means for Solving the Problems]
The present invention has been proposed to achieve the above object, and is characterized by having 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 lateral rib having a shape protruding outward from the container is connected to the lower side of the annular groove, in is formed in a concave shape that is convex in the inside of the container, the panel each other is vacuum panels partitioned by protruding pillar portion outwardly, substantially adjacent the upper end of its said transverse ribs A biaxial stretch blow-molded container is provided that is formed and has no peripheral wall portion above the vacuum absorbing panel .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a biaxially stretched blow-molded container showing an example of an embodiment of the present invention, and FIG. 2 is a side sectional view showing a part of the half-rod portion of FIG.
The blow molded container 1 has an annular groove 3 formed on the peripheral wall 2 thereof, a lateral rib 4 is connected to the lower side of the annular groove 3, and an upper end portion 5 a of a vacuum absorbing panel 5 formed below the lateral rib 4 is a lateral rib. 4 is formed substantially adjacent to 4. 3 is a cross-sectional view taken along line XX of FIG.
[0009]
The reduced pressure absorption panel 5 is formed in a concave shape, and a convex column portion 11 is formed between the reduced pressure absorption panel 5 and the reduced pressure absorption panel 5. That is, the reduced pressure absorption panel 5 and the reduced pressure absorption panel 5 are partitioned by the column part 11 . The reduced pressure absorption panel 5 may have an upper end 5a that is substantially adjacent to the lateral rib 4 that protrudes outward when absorbing the reduced pressure, and that there is no peripheral wall portion above the reduced pressure absorption panel. This is important, and the rigidity can be improved by the lateral rib 4. Further, conventionally, there is no peripheral wall portion formed above the reduced pressure absorption panel 5 that has been deformed during cooling after sealing and has affected the deformation of the column portion 11, so that the column portion 11 is not deformed during the cooling. The effect that it decreases can also be acquired. In addition, it is preferable that another lateral rib 10 is also adjacent to the lower end portion 5b of the vacuum absorbing panel 5, whereby the rigidity of the portion is also improved by the lateral rib, and the column portion 11 is cooled during cooling. Less deformation.
[0010]
Moreover, as shown in FIG. 1, the axial length of the reduced pressure absorption panel 5 is shortened and the axial length of the peripheral wall 2 to which the label is attached can be increased as shown in FIG. 1 has a large space for attaching labels for PR.
[0011]
The present invention has been described with reference to the drawings. However, it is to be understood that embodiments in which these configurations or obvious configurations in bottles are appropriately combined are also included in the technical scope of the present invention without departing from the gist of the present invention. Should be understood.
[0012]
【The invention's effect】
According to the container of the present invention, not only a large capacity but also a small capacity can absorb deformation at the time of decompression without causing a decrease in strength, it has a good appearance, and the decompression absorption panel is made small. By being able to do, it becomes easy to stick a label and can raise commercial value.
Moreover, since the rigidity of the trunk portion 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 biaxial stretch blow molded container showing an example of an embodiment of the present invention.
FIG. 2 is a side cross-sectional view showing a part of the half hook portion of FIG.
FIG. 3 is a cross-sectional view taken along line XX in FIG.
FIG. 4 is a side view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Biaxial stretch blow molding container 2, a Circumferential wall 3, b Annular groove part 4, 10 Horizontal rib 5, d Pressure-reduction absorption panel 5a Upper end part 5b Lower end part 11, e Column part

Claims (1)

In the biaxial stretch blow molded container in which the annular groove is formed on the peripheral wall,
A lateral rib that protrudes outward from the container is connected to the lower side of the annular groove, and a concave shape that protrudes inward from the container is formed below the lateral rib. two vacuum panels, which are partitioned by the pillar portion of the upper portion of its formed substantially adjacent to the transverse rib, and, characterized in that the peripheral wall portion above the vacuum panels do not exist Axial stretch blow molded container.

Images