JPH0415636Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat-resistant and pressure-resistant bottle container made of polyethylene terephthalate resin that is biaxially stretched and blow-molded.

[Conventional technology]

Many biaxially stretched synthetic resin bottles are now being used as containers for storing carbonated beverages, and biaxially stretched bottles made of polyethylene terephthalate resin in particular are known for their excellent properties. is used more often.

[Problem to be solved by the invention] In this conventional bottle container, the bottom of the bottle body is a part that is not subjected to much stretch forming compared to other parts, as the lower end of the stretch forming rod comes into contact with it during the forming process. It is becoming.

Therefore, in bottles made of polyethylene terephthalate resin, which exhibit excellent heat and pressure resistance only after being subjected to stretch molding, the bottom part is relatively vulnerable to heat and pressure.

However, the strength of the bottom is sufficient to store carbonated drinks such as cola, and along with the many properties of polyethylene terephthalate resin bottles, they are used as excellent bottles for carbonated drinks. .

Taking advantage of the excellent characteristics of this polyethylene terephthalate resin bottle, it has been considered to use this bottle as a container for carbonated beverages containing fruit juice.

However, the problem here was the bottom portion, which could not be subjected to much stretch molding and lacked heat and pressure resistance.

In the case of fruit juice-containing carbonated drinks, unlike non-fruit juice carbonated drinks such as cola, it is necessary to sterilize the content by supplying boiling water to the bottle container after storing and sealing the bottle. In the case of conventional bottles, the bottom part becomes soft due to the heat of the boiling water, and expands and deforms due to the increased internal pressure of the bottle due to the rise in temperature.

In addition, in a bottle container in which a bottomed cylindrical base cup is fitted and assembled to the bottom of the bottle body in order to give the bottle a self-supporting function, when the above-mentioned fruit juice beverage is sterilized with a boiling water shower, the hot water is poured into the base cup. Since it is assembled, it does not come into contact with the bottom of the bottle body, and therefore sufficient sterilization cannot be performed.

The present invention was devised to solve the above-mentioned problems in the conventional technology, and takes advantage of the properties of polyethylene terephthalate resin to have excellent heat resistance and pressure resistance, as well as to sufficiently sterilize and sterilize the liquid content by showering with boiling water. The purpose of this invention is to provide a bottle container capable of storing and holding fruit juice-containing carbonated beverages without any inconvenience.

[Means to solve the problem]

The means of the present invention to solve the above technical problem is to assemble and fix a base cup in the shape of a cylinder with a bottom, which becomes a leg part, to the bottom part of a bottle made of polyethylene terephthalate resin that is made of biaxially stretched blow molded resin and protrudes in the shape of a hemispherical shell. It must be a heat-resistant and pressure-resistant bottle container; The bottom of the bottle should have a plurality of convex portions protruding downward in a radial pattern centered on the center point of the bottom wall of the bottle; The upper edge of the peripheral wall of the base cup should be An opening is formed between the base cup and the bottom of the bottle through which the hot water shower enters by facing the recess between the base cup and the bottom of the bottle.

[Effect]

Since the bottom of the bottle is integrally molded with a plurality of protrusions, it is sufficiently stretch-molded and therefore has excellent heat resistance and pressure resistance.

Furthermore, the plurality of convex portions formed on the bottom of the bottle function as mechanically reinforcing ribs for the bottom, thereby sufficiently increasing the mechanical strength of the bottom of the bottle.

Since an opening is formed between the base cup and the bottle, which are fitted and assembled into the bottom of the bottle,
The hot water shower sprayed onto the bottle comes into contact with the outer surface of the bottle and heats the liquid inside, flowing down along the surface of the bottle, and is then inserted into the base cup from the opening while still contacting the surface of the bottle. The bottom of the bottle is heated, and this heating achieves sufficient heating of the liquid content located within the bottom of the bottle.

In this way, the liquid content located at the bottom of the bottle can also be sufficiently heated, so the heating of the liquid content located at the bottom of the bottle causes a convection phenomenon in the liquid content inside the bottle. Due to the convection phenomenon, the entire content liquid can be heated well, and the sterilization and sterilization of the content liquid can be achieved reliably and efficiently.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

On the bottom 4 of the bottle 2, six protrusions 6 are provided radially projecting at equal central angles, and the upper end of each protrusion 6 is connected to the upper end of the bottom 4, that is, the lower end of the body of the bottle 2. It extends to

The bottom wall 7 of the base cup 3 is raised at a portion opposite to the lower end of the convex portion 6 to form a support portion 9, and this support portion 9 supports the lower end portion of the convex portion 6 from below. That is, when fitting and assembling the base cup 3 into the bottle body 2, the position where the lower end of the convex portion 6 of the bottle body 2 comes into contact with the support portion 9 of the base cup 3 is the assembly limit position.

When the base cup 3 is fitted and assembled to the bottom 4 of the bottle body 2 to the limit, the upper end of the peripheral wall 8 of the base cup 3 is located lower than the upper end of the convex part 6, as shown in FIG. , facing the recess 5 formed between the protrusions 6, and opening 10 by this recess 5.
is formed.

In the bottom wall 7 of the base cup 3, there are discharge ports 11 on the inside and outside of the support part 9, which are outlets for the hot water flowing into the base cup 3 to flow out from inside the base cup 3.
However, the size of the outlet 11 is such that the amount of hot water that flows out from the outlet 11 per unit time is smaller than the amount of hot water that enters from the opening 10 per unit time. According to
The hot water can be allowed to stay in the base cup 3 for a suitable period of time, thereby making it possible to more effectively heat the content liquid with the hot water.

[Effect of idea]

Since the present invention has the above-described configuration, it has the following effects.

Since the bottom of the bottle has a plurality of protruding parts, the bottom part can be sufficiently stretched and molded into the final shape, effectively bringing out the properties of polyethylene terephthalate resin, resulting in excellent heat resistance,
It can exhibit pressure resistance effect.

Since the convex portion shaped on the bottom structurally functions as a reinforcing rib on the bottom, it is possible to increase the mechanical strength of the bottom, thereby increasing the mechanical strength such as drop strength of the bottom of the bottle container. I can do it.

Since an upwardly opening opening is formed between the bottle and the base cup, the hot water shower sprayed onto the bottle surface is allowed to flow down along the bottle surface, enter the base cup, and reach the bottom surface of the bottle. Since the contact can be made, the content liquid in the bottom of the bottle can be sufficiently heated by the boiling water, and the content liquid can be sufficiently and efficiently heated by the boiling water shower, so that the content liquid can be sterilized and Sterilization can be achieved reliably and efficiently.

[Brief explanation of the drawing]

FIG. 1 is an overall front view showing an embodiment of the present invention with only the base cup taken in a semi-longitudinal section. 2 is a bottom view showing the structure of the bottom of the bottle shown in FIG. 1. FIG. FIG. 3 is an enlarged front view of the bottom of the bottle shown in FIG. 1. Explanation of symbols, 1...Bottle container, 2...Bottle body, 3...
...base cup, 4...bottom, 5...recess, 6...
... Convex portion, 7... Bottom wall, 8... Peripheral wall, 9... Support portion, 10... Opening, 11... Outlet.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A heat-resistant bottle made of biaxially stretch blow-molded polyethylene terephthalate resin with a base cup in the shape of a cylinder with a bottom attached to the bottom protruding in the shape of a hemispherical shell and fixed thereto; In the pressure bottle container, a plurality of convex portions are formed on the bottom of the bottle so as to protrude downward in a radial manner centered on the center point of the bottom wall of the bottle, and the upper end edge of the peripheral wall of the base cup is formed between the convex portions. A heat-resistant and pressure-resistant bottle container comprising an opening through which hot water shower enters between the base cup and the bottom of the bottle by opposing the recess of the base cup. (2) The heat-resistant and pressure-resistant bottle container according to claim 1, wherein the upper edge of the base cup is positioned lower than the upper edge of the convex portion so that the upper edge of the base cup faces the concave portion.