JP2005075421A - Resin-made container for heating, and beverage contained in the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin-made container for heating of excellent appearance capable of suppressing an increase in the internal pressure of the container when heating the beverage contained in the resin-made container, and the beverage contained in the resin-made container. <P>SOLUTION: In the resin-made container 3 for heating the beverage filled therein, a plurality of evacuation-absorptive panels 17 which is deformed inward of the container when the container 3 is evacuated are provided on a circumferential surface of a container barrel portion 13, and a column part 19 between the evacuation-absorptive panels 17 and 17 forms a curved shape 21 which is recessed inward of the container. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a resin container for beverages, and more particularly to a warming resin container used for so-called aseptic filling in which an empty container is filled with a beverage under aseptic conditions and a beverage containing a warming resin container.

  In general, beverage filling methods include aseptic filling and hot pack filling. In aseptic filling, a PET bottle (polyethylene terephthalate container) is sterilized by chemical rinsing and rinsed with sterile water, and then the sterilized beverage is filled into the PET bottle at room temperature.

  In hot pack filling, a beverage heated to a high temperature (about 70 to 100 ° C.) is filled into a PET bottle. In such hot pack filling, since a high temperature beverage is filled, the beverage is filled at room temperature after filling the beverage. In order to reduce the pressure reduction, a technique is known in which the body portion is provided with a pressure reduction absorption panel and the column portion between the pressure reduction absorption panels projects outwardly (Patent Document 1).

  On the other hand, in beverages in resin containers, when products are sold in stores in winter, etc., the beverage is warmed by placing it in a can warmer that heats the canned beverage on a heating plate (about 55 ° C. to 60 ° C. ) It is being sold or heated with vending machines.

Japanese Patent Laid-Open No. 10-58527

  However, if heated aseptically filled resin containers are heated, the internal pressure of the containers will increase, and if the containers are deformed and bulge, or if severe, the bottom will bulge out due to buckling and the self-supporting stability will decrease. There is a fear.

  Accordingly, an object of the present invention is to provide a resin container for heating and a resin container-containing beverage that have a good appearance while suppressing an increase in the internal pressure of the resin container-containing beverage during heating.

  The invention described in claim 1 is a resin container for warming filled with a beverage, wherein the peripheral surface of the container body is deformed toward the inside of the container when the container is depressurized. A plurality of panels are provided, and the column part between the vacuum absorption panels has a curved shape that is recessed toward the inside of the container.

  According to a second aspect of the invention, in the first aspect of the invention, the container body receives the internal pressure in the container and deforms toward the outside of the container when the internal pressure of the container increases, thereby reducing the internal pressure. Thus, a positive pressure absorbing panel recessed in the container is provided.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the curved dent of the body portion is an arc shape formed between the shoulder side end and the bottom side end.

  The invention described in claim 4 is characterized in that, in the invention described in claim 3, the arc of the trunk portion has the center between the shoulder side end and the bottom side end as a maximum recess position.

  The invention according to claim 5 is characterized in that, in the invention according to claim 4, the maximum dent amount of the body portion is 0.3 mm to 1.0 mm than the outer diameters of the shoulder portion and the bottom portion.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, which is made of a non-heat resistant resin for aseptic filling that fills a sterilized beverage at room temperature after sterilizing the inside of the container. It is characterized by.

  The invention according to claim 7 is a beverage containing a resin container for heating, wherein the resin container according to any one of claims 1 to 6 is filled with a drink.

  According to the first aspect of the present invention, when the beverage inside the resin container is heated and the internal pressure of the container rises, the body of the container tends to swell due to the internal pressure. Since it is curved and recessed, the pressure resistance is increased and the inner pressure is higher than the predetermined pressure, so that it deforms and bulges, but even if it bulges, it does not bulge outward, so the appearance is not impaired, Moreover, it is possible to prevent the beverages in resin containers arranged adjacent to each other from being caught by each other and becoming difficult to take out. In addition, since the container internal pressure is absorbed by the container body that occupies most of the capacity of the container, a high internal pressure can be absorbed. Thereby, the deformation | transformation of a container bottom part can be reduced and the self-supporting stability of a container increases.

  According to the second aspect of the invention, the same effect as that of the first aspect of the invention can be obtained, and when the container-containing beverage is heated to increase the internal pressure of the container, in addition to the pillar portion Further, the positive pressure absorption panel provided in the container body absorbs the increase in the container internal pressure, so that a higher internal pressure can be absorbed and the deformation of the container bottom can be further reduced, and the self-supporting stability of the container is further enhanced.

  According to the invention of the third aspect, the same effect as that of the invention of the first or second aspect can be obtained, and the container body is formed in an arch shape recessed on the inner side of the container. Such a load can be distributed substantially evenly, pressure resistance can be increased, and buckling is difficult.

  According to the invention of claim 4, the same effect as that of the invention of claim 3 can be obtained, and the center of the concave arc in the container body is in the center in the side line direction of the body, The container body can receive the pressure in the container substantially uniformly over the lateral direction, the container body is stable, and local deformation and buckling can be prevented.

  According to the fifth aspect of the invention, it is possible to obtain the same effect as that of the fourth aspect of the invention, and it is possible to reduce the increase in internal pressure without affecting the appearance.

  That is, as a result of the experiment, if the dent amount is smaller than 0.3 mm, there is a risk that the increase in internal pressure during heating sales (55 ° C. to 60 ° C.) may not be sufficiently absorbed. This is because, when an external force is applied in the side line direction of the trunk (when a beverage containing a resin container is stacked, etc.), the amount of the dent is too large and the curved dent is likely to buckle.

  According to the invention described in claim 6, the same effect as in the invention described in any one of claims 1 to 5 can be obtained, and in aseptic filling, a non-heat resistant resin is generally used. At the same time, the container is thinner than the hot pack filling, and the strength is inferior to the resin container for hot pack filling. Since it can be reduced, even an aseptic filling beverage using a conventional non-heat resistant resin container can be heated and sold, which has not been possible in the past.

  According to the invention described in claim 7, it is possible to provide a resin-contained beverage that can obtain the same effect as that of any one of claims 1 to 6.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, the first embodiment of the present invention will be described with reference to FIGS. 1 is a front view of a resin container according to the first embodiment, FIG. 2 is a bottom view of the resin container shown in FIG. 1, and FIG. 3 is a longitudinal sectional view of the resin container shown in FIG. 4 is a longitudinal sectional view for explaining the operation of the resin container shown in FIG. 3, and FIG. 5 is a transverse sectional view of the trunk of the resin container shown in FIG.

  The resin container-containing beverage 1 according to the present embodiment is manufactured by aseptic filling, and the resin container 3 is a beverage bottle made of polyethylene terephthalate (PET) and is made of a non-heat resistant resin. . The resin container 3 includes a container body 5 and a cap 7, and the container body 5 includes a mouth portion 9, a shoulder portion 11, a trunk portion 13, and a bottom portion 15. . A cap 7 is attached to the mouth portion 9 and sealed. A groove 23 is formed between the trunk portion 13 and the shoulder portion 11, and a groove 25 is also formed between the trunk portion 13 and the bottom portion 15.

  The capacity of the resin container 3 is 270 ml in the present embodiment, but may be 500 ml, and the capacity is not limited.

  In the resin container 3, the cross section of the body portion 13 has a substantially circular shape, and six decompression absorption panels 17 are arranged on the circumferential surface of the body portion 13 at equal intervals. A column part 19 is formed between the adjacent reduced pressure absorption panels 17 and 17 to partition the reduced pressure panels 17 and 17 and increase the strength of the body part 13.

  Each decompression absorption panel 17 is located inside the container with respect to the outer surface of the column part 19, and when the interior of the container 3 is depressurized, it is deformed so as to be recessed inward to reduce decompression in the container. Therefore, when the container 3 is cooled and sold, the influence on the appearance due to the deformation of the container can be reduced.

  In the column part 19, a dent 21 is formed between the shoulder side end 13 a and the bottom side end 13 b so as to bend in the side line direction toward the inside of the container.

  The recess 21 has an arc shape, and the center S of the arc R is on the outer side of the container. In the present embodiment, the center portion 13 of the trunk portion 13 between the shoulder side end 13a and the bottom side end 13b is substantially centered. Is located.

  The diameter of the arc R is not particularly limited, but is preferably 10 to 20 times the dimension in the side line direction of the trunk (the dimension between the shoulder side end 13a and the bottom side end 13b). It is set to 14 times. In the present embodiment, the dimension of the column portion 19 in the side line direction is 56 mm, and R is 789.25 mm.

  As for the dent 21, the approximate center 19a between the shoulder part side end 13a and the bottom part side end 13b is the largest. Thus, by making the dent 21 into an arc and the center 19a to be the largest dent, it is possible to prevent a local bias in the pressure received in the side line direction of the body part 13, and to reduce the internal pressure substantially uniformly in the side line direction of the body part 13. Can receive external pressure.

  In this Embodiment, as for the largest dent amount in the center position 19a of the pillar part 19, 0.3 mm-1.0 mm are preferable. If it is smaller than 0.3 mm, the dent is too shallow to absorb the internal pressure sufficiently, and if it is larger than 1.0, the amount of the dent is too large to affect the appearance, and the capacity needs to be adjusted, affecting the bottle design. Because it gives.

  Next, the effect | action of the beverage 1 with a resin container concerning this Embodiment is demonstrated. When the beverage 1 in a resin container is heated, the internal pressure in the container increases. When the internal pressure in the container reaches a predetermined value or more, as shown in FIG. 4, the column portion 19 that is recessed in an arc shape bulges outward due to deformation. For example, the shoulder of the trunk portion 13 does not bulge greatly outward. It stays at the same level as the part side end 13a and the bottom part side end 13b or to the extent that it is located inside the container. Therefore, the container 3 can be prevented from bulging out during heating.

  In particular, in the present embodiment, since the beverage is aseptically filled, the container material is also non-heat resistant and thinner than the hot pack filled container, but in this way the conventional aseptic container material is used. Even if it is used as it is, the increase in the internal pressure of the container at the time of heating can be reduced, and the aseptic filling beverage can be heated and sold.

(Test example)
Below, since the test was done about the resin-made container and comparative product concerning embodiment mentioned above, the content is demonstrated.

  A resin container having the specifications shown in Table 1 was prepared, and the product of the present invention (resin container according to the embodiment) and a comparative product were stored in a thermo-hygrostat at a temperature of 60 ° C. and a humidity of 50% for one day. The size of each positive pressure absorption panel (bottom) E of the product and the comparative product was measured, and the dimensional change during heating was measured. The measurement was performed on five resin containers, and the average value was calculated.

  Further, the comparative product is obtained by straightening the column portion 19 of the resin container according to the above-described embodiment without attaching the dent 21, that is, the shoulder side end 13 a, the bottom side end 13 b, and the column of the trunk portion 13. It is the same as the part 19.

  The amount of dimensional change of the positive pressure absorption panel 27 at the bottom 15 is a value obtained by subtracting the measurement value before heating from the measurement value after heating, whereas the product of the present invention was -1.30 mm, The conventional product was -4.12 mm. It is shown that the larger the minus (−) value is, the larger the bulge is due to an increase in internal pressure and the size is changed. Both the invention product and the conventional product are not heat-treated (crystallized) on the body part 13, so the crystallization of the body part 13 is low (refer to "Corner Crystallinity" in Table 1). However, since the product of the present invention absorbs the positive pressure in the container due to the deformation of the column part 19, it is clear that the bulge amount at the bottom part is small and the buckling resistance is excellent. .

  Other embodiments of the present invention will be described below. In the embodiments described below, parts having the same effects as those of the first embodiment described above are denoted by the same reference numerals. Detailed description of the portions will be omitted, and differences from the first embodiment will be mainly described.

  6 and 7 show a beverage 1 in a resin container according to a second embodiment of the present invention. In the second embodiment, the body 13 of the container body 5 is provided with the decompression panel 17 and the positive pressure absorption panel 31 alternately along the circumferential direction around the body 13 to increase the pressure in the container. At the time, the body portion 13 receives the internal force of the container to reduce the internal pressure. The positive pressure absorption panel 31 is provided so as to be further curvedly curved inside the container from the inclined surface part 35 recessed inside the basic outer shape surface 33 of the container body part 13.

  The recessed dimension G from the basic outer surface 19 in the inclined surface part 35 is equal to or smaller than the dimension F from the container inner end 37 of the inclined surface part 35 to the bottom of the positive pressure absorbing panel 31, and the positive pressure absorbing panel When 31 deform | transforms toward the container outer side from the container inner side edge 37 of the inclined surface part 35, it is located in a container inner side from the basic external surface 33. As shown in FIG. Thereby, when the positive pressure absorption panel 31 is deformed by receiving the internal pressure of the container, it is possible to improve the appearance without protruding from the basic outer surface 33 of the container and to press against the container 1 disposed adjacently. Absent. Moreover, since the positive pressure absorption panel 17 is made into one continuous curved surface, when the positive pressure absorption panel 17 is deformed, the deformed shape can be made constant, and irregular deformation can be prevented.

  According to the second embodiment, when the beverage in a resin container is heated to increase the internal pressure of the container, the positive pressure absorbing panel 31 provided in the container body 13 can also increase the internal pressure of the container in addition to the column portion 19. Since the increase is absorbed, a higher internal pressure than that in the first embodiment can be absorbed, and the deformation of the container bottom 15 can be further reduced, thereby further improving the self-supporting stability of the container.

  FIG. 8 shows a third embodiment of the present invention. In the third embodiment, the decompression panel 17 and the positive pressure absorption panel 31 are provided above and below the trunk section 13 around the trunk section 13. In the third embodiment, the same operational effects as in the second embodiment can be obtained.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.

  For example, the shape of the reduced pressure absorption panel 17 is not particularly limited as long as it is deformed by receiving the internal pressure of the container.

It is a front view of the resin-made containers concerning a 1st embodiment. It is a bottom view of the resin container shown in FIG. It is a longitudinal cross-sectional view of the resin container shown in FIG. It is a longitudinal cross-sectional view explaining the effect | action of the resin containers shown in FIG. It is a cross-sectional view in the trunk | drum of the resin container shown in FIG. It is a front view of the resin-made containers concerning 2nd Embodiment. It is AA sectional drawing shown in FIG. It is a front view of the resin-made containers concerning 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Beverage with resin container 3 Resin container 13 Body 13a Shoulder side end 13b Bottom side end 17 Decompression absorption panel 19 Column 21 Recess

Claims (7)

  A resin container for filling a beverage, the peripheral surface of the container body is provided with a plurality of reduced pressure absorption panels that deform toward the inside of the container when the pressure inside the container is reduced, and a column portion between the reduced pressure absorption panels Has a curved shape that is recessed toward the inside of the container.   The container body is provided with a positive pressure absorption panel that is recessed on the inside of the container so as to reduce the internal pressure by receiving the internal pressure in the container and deforming toward the outside of the container when the internal pressure of the container increases. The heating resin container according to claim 1.   The warming resin container according to claim 1 or 2, wherein the curved dent of the trunk portion is an arc shape formed between the shoulder side end and the bottom side end.   4. The heating resin container according to claim 3, wherein the arc of the trunk portion has a center between the shoulder side end and the bottom side end as a maximum recess position. 5.   5. The resin container for heating according to claim 4, wherein the maximum dent amount of the body portion is 0.3 mm to 1.0 mm than the outer diameters of the shoulder portion and the bottom portion.   It is made of a non-heat-resistant resin for aseptic filling that fills a sterilized beverage at room temperature after sterilizing the inside of the container, and is made of a heating resin according to any one of claims 1 to 5 container. A beverage containing a resin container for heating, wherein the resin container according to any one of claims 1 to 6 is filled with a beverage.

Images