JP2001048249A - Drinking water container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a container whose heat insulating property is improved and which is not bulky and is suitable for carrying by providing a plurality of protrusions or recesses on a body of a bottle and covering at least the body with a heat insulating sheet. SOLUTION: The drinking water container 1 roughly comprises a bottle 2, a heat insulating sheet 3 and a cap 4, wherein the bottle 2 is made of a light-weighted and highly moldable thermoplastic resin. Protrusions 21 of recesses 22 are provided on a surface of the bottle 2, thereby forming an air region 25 between the bottle 2 and the heat insulating sheet 3. Thus with the cooled or heated drinking water container 1 containing a drinking water 5, the drinking water 5 is difficult to restore to a normal temperature even if it is carried since air closed in the air region 25 assists heat insulating effects. As a result, a temperature of the drinking water 5 is not easily affected by an ambient temperature even if the container filled with the drinking water 5 is being carried for a long time. Thus the container is convenient and not bulky, and can be easily carried.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for drinking water, such as juice, coffee drink, tea, mineral water, etc., which is desirably cooled or heated.

[0002]

2. Description of the Related Art Conventionally, drinking water such as juice and coffee drinks is often sold in glass bottles or metal cans, and most of these can be plugged again once opened. Did not. For this reason, consumers purchase drinking water such as juices and coffee drinks when they are thirsty when going out, and drink it. Usually, when the mouth of the container is opened, the drink is consumed on the spot. However, in recent years,
A drinking water container with a cap made of polyethylene terephthalate having a capacity of about 500 ml (hereinafter referred to as a 500 ml PET bottle) has appeared, and the drinking style of consumers has begun to change. If you are thirsty, you buy drinking water such as juice and drink it. Instead of drinking it on the spot, drink as much juice as you want and then re-cap and carry it.

[0003] Incidentally, there have conventionally been many cap-capable drinking water containers (hereinafter referred to as large PET bottles) made of polyethylene terephthalate having a capacity exceeding 1 liter, but these are used for drinking water at home. Container except for special cases such as hiking and athletic meet,
It was rarely carried when going out. In addition, some drinking water containers made of glass bottles have screw-type caps attached, but glass bottles are heavy and are almost never carried around, and were usually drunk on the spot. .

[0004] By the way, conventional drinking water filled in glass bottles or metal cans is usually drunk up immediately after opening the container, so that it is cooled or heated to a temperature suitable for drinking. If purchased, the drinking water could be drunk in a delicious condition. However, since 500 ml PET bottles are often carried without being drunk all at once, even if they are preciously cooled or heated, drinking water often returns to room temperature while carrying,
Until the end I couldn't drink it in good condition.

[0005] In order to solve such a problem, there is a cool bag made of a base sheet in which a nonwoven fabric or a foamed plastic sheet is bonded to a metal foil. Because the bag has excellent heat insulating properties, if it is cooled to a temperature suitable for drinking, or if a heated 500 ml plastic bottle is placed, it will cool or warm drinking water for about 3 hours depending on the outside temperature. You can drink. However, the bag is not part of the drinking water container and is a separate item for keeping cool. Thus, usually, the bags are sold separately from drinking water,
When drinking water is completely consumed like a drinking water container, it is not discarded but used repeatedly. Therefore, the use form of the cold storage bag is as follows: (1) go out with the bag when going out, (2) take out the cold storage bag when purchasing a 500 ml plastic bottle, use it, and (3) after drinking water, It was common to remove the cool bag from the drinking water container and bring it home. Therefore, it is not used easily because it lacks convenience.

[0006] In order to bring a large PET bottle to camping, hiking, athletic meet and the like, a cool container made of styrene foam has been developed. Though the idea of reducing the size of the cold storage container and using it for a 500 ml PET bottle was also studied, putting a 500 ml PET bottle in a cold storage container made of Styrofoam becomes bulky and difficult to carry. Also, like the cold storage bag, the cold storage container is a separate article from the drinking water container, and thus has a problem that it is not easy to use.

[0007]

The problem to be solved by the present invention is to improve the drinking water container itself without using a separate article, to provide a heat-insulating, non-bulky, portable beverage. It is to provide a container for water.

[0008]

According to the present invention, as a means for solving the above problems, there is provided a drinking water container comprising a plastic bottle, an insulating sheet covering the bottle, and a cap. Wherein a plurality of convex portions and / or concave portions are provided on the body portion of the container, and at least the body portion is covered by the heat insulating sheet. The drinking water container is provided, wherein the sheet has at least a layer made of a foamed plastic sheet.

[0009] Further, the present invention provides the drinking water container, wherein the heat insulating sheet is a sheet in which a plastic film is adhered to the surface of a foamed plastic sheet. The container for drinking water is provided, and the container for drinking water is further provided, wherein the capacity of the bottle is 350 to 1000 ml.

In other words, the bottle is wrapped with a relatively thin heat-insulating sheet in order to increase the heat insulation without increasing the bulk of the container without using another article. The effect is not enough. Therefore, by providing a convex portion and / or a concave portion on the surface of the bottle and providing an air region between the bottle and the heat insulating sheet, the heat insulating property of the container is further improved, and the above problem is solved. Conventionally, there is a glass drinking water container covered with a foamed plastic sheet, but this is mainly used as a cushioning material to prevent the glass from being broken by an external impact. Effect was not enough.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a container 1 for drinking water of the present invention.
2A is a perspective view of FIG. 1A, and FIG. 2B is a sectional view taken along line aa ′ of FIG. The drinking water container 1 is roughly composed of a bottle 2, a heat insulating sheet 3, and a cap 4. The bottle 2 is preferably made of a thermoplastic resin that is lightweight and has good moldability, and is preferably made of polyethylene terephthalate in consideration of heat resistance, economy, strength, effects on drinking water, and the like. In addition, the capacity of the bottle 2 is not particularly limited, but if it is an amount that can be drunk all at once, it is not meaningful to insulate, and conversely, if the capacity is too large, it is difficult to carry it. 350-1
It is preferably about 000 ml, especially about 500-900 ml.

A convex portion 21 and / or a concave portion 22 are provided on the surface of the bottle 2, and an air region 25 is formed between the bottle 2 and the heat insulating sheet 3 by these concave and convex portions. The cooled or warmed drinking water container 1 containing the drinking water 5 is then filled with this air region 25.
The air trapped in the air assists the heat insulation effect, so that the drinking water 5 hardly returns to normal temperature even when carried out. Note that the larger the air area 25, the more difficult it is for the drinking water 5 to return to room temperature, but the larger the drinking water container 1 becomes, and the more difficult it is to carry.

Next, the heat insulating sheet 3 is not particularly limited in its resin composition, layer structure, etc. as long as it is a sheet having an excellent heat insulating effect. Plastic sheets, foamed plastic sheets, non-woven sheets,
A metal foil and the like can be exemplified. These sheets may be used alone or two or more of them may be laminated, but when at least one layer is a foamed plastic sheet, the heat insulating property of the heat insulating sheet becomes very good. Further, in order to perform the specific gravity separation described later, it is desired that the apparent specific gravity of the heat insulating sheet 3 is small. However, if at least one of the heat insulating sheets 3 is a foamed plastic sheet, the apparent specific gravity becomes considerably small.

Further, the heat insulating sheet 3 is located on the outermost side of the packaging container 1, but this portion is a portion that is easily noticed by consumers. Therefore, when a non-foamed plastic film that has been printed or colored is attached to the surface of the foamed plastic sheet instead of using the foamed plastic sheet alone as the heat insulating sheet 3, the appearance of the drinking water container 1 is improved. Become beautiful. At this time, when the non-foamed film and the foamed sheet are stuck together so that the printed surface of the non-foamed plastic film is on the foamed plastic sheet side, the printed surface is located between the non-foamed film and the foamed sheet. Even if the heat insulating sheet 3 is slightly damaged, the print is not cut off and becomes beautiful.

Furthermore, considering the case where the drinking water container 1 is recycled, the heat insulating sheet 3 may be made of (1) the same kind of resin as the resin constituting the bottle 2, or (2) the heat insulating sheet. 3 The apparent specific gravity of the whole is 1.0 g / ml
Preferably, it is less than 0.8 g / ml. (1) If the bottle 2 and the heat insulating sheet 3 are formed of the same resin, the heat insulating sheet 3 does not have to be removed from the bottle 2 even if it is necessary to dispose the drinking water container 1 separately for each resin. It is. Also, (2) when the apparent specific gravity of the entire heat insulating sheet 3 is 1.0 g / ml or less, when the drinking water container 1 needs to be separated by resin, without removing the heat insulating sheet 3 from the bottle 2, After pulverizing them together, specific gravity separation using general water is performed by utilizing the difference in apparent specific gravity, so that they can be separated by resin.

When the heat insulating sheet 3 is thick, the container for drinking water obtained is bulky, and when it is thin, the heat insulating effect becomes insufficient.
Considering these facts, the heat insulating sheet 3 of the present invention is 5
The thickness is preferably about 0 to 300 μm.

Further, the heat insulating sheet 3 may be a sheet having little elasticity, but if it has some elasticity, it fits the bottle 2 and the heat insulating sheet 3 is hard to slip off. When the heat insulating sheet 3 has heat shrinkability, the heat insulating sheet 3 is roughly attached to the bottle 2,
Thereafter, when hot air is blown onto the heat insulating sheet 3, the sheet 3 contracts and fits the bottle 2 neatly. In particular, as shown in FIG. 1, when the heat insulating sheet covers both the very thin neck portion 23 and the relatively thick body portion 24, if the sheet 3 has heat shrinkage, the heat insulating sheet 3 becomes a bottle. It does not come up at the neck portion 23 of the lens and fits neatly.

The cap 4 attached to the bottle 2 can be, for example, the same cap as that conventionally used for 500 ml plastic bottles, large plastic bottles and the like.

FIG. 2 is a perspective view showing another embodiment of the drinking water container according to the present invention. Convex part 21 and concave part 22
May be provided in any position of the body portion 24 of the bottle 2 without any particular problem.
The shape of No. 2 is not particularly limited. However, as shown in FIG. 3, it is preferable that the air region 25 formed by the convex portion 21 and the concave portion 22 is surrounded by the bottle 2 and the heat insulating sheet 3. As shown in FIG. 3, when the air region 25 is surrounded by the bottle 2 and the heat insulating sheet 3, it is difficult for the cooled or heated air to escape into the atmosphere, and the heat insulating effect is excellent.

The heat insulating sheet 3 may cover almost the entire area of the bottle 2 as shown in FIG. 1, but in this case, it is difficult to adjust the shape of the heat insulating sheet 3 to fit the bottle 2. Therefore, as shown in FIGS.
4 may be covered. Drinking water 5 is neck 2
3 is not filled up to the top, and when the container 1 is opened and the bite drinking water 5 is drunk, the drinking water 5 disappears in the neck portion 23. The diameter R (see FIGS. 1 (B), (C), 2 (B), 3 (B)) in the horizontal cross section of the bottle 2 usually gradually increases from the mouth toward the bottom. When it increases to some extent, it becomes almost constant from there.
In the present specification, the substantially constant portion is referred to as a body portion 24, and the mouth side thereof is referred to as a neck portion 23.

Next, a method for producing the drinking water container 1 of the present invention will be described by way of an example. First, the bottle 2, the heat insulating sheet 3, and the cap 4 are manufactured. Bottle 2
Is preferably manufactured using a blow molding method as in a conventional 500 ml PET bottle. Also, the heat insulating sheet 3 and the cap 4 may be formed by a conventionally known manufacturing method.
For example, the heat insulating sheet 3 is preferably manufactured by using a T-die extrusion molding method or an inflation extrusion molding method, and the cap 4 is preferably manufactured by using an injection molding method or the like.

After the bottle 2, the heat insulating sheet 3, and the cap 4 are manufactured, they are then integrated. FIG. 4 shows the process of integration. First, the heat insulating sheet 3 is put on the bottle 2 (FIG. 4B). At this time, when the heat insulating sheet 3 has heat shrinkability, the sheet 3 is formed into a cylindrical shape having a diameter slightly larger than the diameter of the bottle 2, and after covering the bottle 2 with hot air or the like. It is good to use and shrink. When the heat insulating sheet 3 has elasticity, the sheet 3 is formed into a cylindrical shape having a diameter slightly smaller than the diameter of the bottle 2,
It is good to spread this and cover it on the bottle 2. When the bottle 2 and the heat insulating sheet 3 are integrated, the cap 4 is finally attached (FIG. 4C), and the drinking water container 1 of the present invention is completed.

The drinking water container 1 of the present invention may be sold as a commercial product, but is usually used as a container for selling drinking water. In this case, the drinking water container 1 must be filled with drinking water, but in order to reduce the number of manufacturing steps, it is preferable to fill the drinking water at a stage before attaching the cap 4 to the bottle 2. That is, in FIG. 4, it is preferable to fill the liquid between the steps (B) and (C). Before filling with liquid,
This is because if the liquid container 1 is manufactured up to the stage of FIG. 4C, the cap 4 must be removed when filling with drinking water.

In the case where the drinking water container 1 is filled and the drinking water is filled away from the manufacturing place of the drinking water container 1 without manufacturing the drinking water container 1 and filling the drinking water in one line, FIG.
(B), the semi-finished product in which the bottle 2 and the heat insulating sheet 3 are integrated, and the cap 4 which is separated and transported to a drinking water filling place, where the drinking water is filled, It is preferable to attach to.

Next, another method of manufacturing the drinking water container 1 will be described with reference to FIG. In FIG. 4, first, the heat insulating sheet 3 is attached to the bottle 2 and then the cap 4 is attached. However, as shown in FIG. 5, the cap 4 is first attached (FIG. 5B), and then the heat insulating sheet 3 is attached. Mounting (Fig. 5
(C)). Further, when the drinking water container 1 manufactured by the method shown in FIG.
Although the container 1 must be filled with drinking water, in order to reduce the number of manufacturing steps, the drinking water is required at a stage before the cap 4 is attached, that is, at a stage between FIGS. 5 (A) and 5 (B). Is preferably filled.

[0026]

In the drinking water container of the present invention, an air region is formed around the bottle, and the air region is surrounded by a heat insulating sheet. In comparison, it is excellent in heat insulation. Therefore, even if drinking water is put in the container and carried for a long time, the temperature of the drinking water is hardly affected by the outside air temperature. In addition, the drinking water container of the present invention is not kept insulated by using a special separate article, but is not provided with heat insulation, but is improved in part of the container to provide heat insulation. There is no lack of simplicity in use such as a container or a cool bag, and the container is neither bulky nor difficult to carry.

Furthermore, when the heat insulating sheet has at least a layer made of a foamed plastic sheet, the heat insulating property is further improved. In addition, since the apparent specific gravity of the heat insulating sheet is significantly reduced, when it becomes necessary to separate the bottle and the heat insulating sheet, it becomes easier to separate the bottle by the specific gravity. Furthermore, when the heat insulating sheet is formed from a sheet in which a non-foamed plastic fill is attached to the surface of a foamed plastic sheet, beautiful printing can be performed on the non-foamed surface, and the appearance of the drinking water container can be improved. Becomes beautiful.

Furthermore, when the heat insulating sheet of the present invention has heat shrinkability, it fits neatly when the heat insulating sheet is mounted on the bottle, and the heat insulating sheet does not detach from the bottle. In addition, the container for drinking water of the present invention has a capacity of 3
It is particularly effective when the volume is about 50 to 1000 ml, especially about 500 to 750 ml. Further, the drinking water container of the present invention,
Although it can be used particularly suitably as a container for drinking water,
Any liquid that needs to be carried in a cooled or heated state can be used as a container without any particular limitation.

[Brief description of the drawings]

FIG. 1 is a perspective view (A) showing an embodiment of a drinking water container of the present invention, and a cross-sectional view (A) of FIG.
It is sectional drawing (C) in b '.

FIG. 2 is a perspective view (A) showing an embodiment of the drinking water container of the present invention, and a cross-sectional view (B) along aa ′.

FIG. 3 is a perspective view (A) showing an embodiment of the drinking water container of the present invention, and a cross-sectional view (a) along aa ′.

FIGS. 4A to 4C are diagrams illustrating a method for manufacturing a drinking water container of the present invention.

FIGS. 5A to 5C are diagrams illustrating a method for manufacturing a drinking water container according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drinking water container 2 Bottle 21 Convex part 22 Concave part 23 Neck part 24 Body part 25 Air area 3 Insulation sheet 4 Cap 5 Drinking water

Claims (5)

[Claims] 1. A drinking water container 1 comprising a plastic bottle 2, a heat insulating sheet 3 covering the bottle 2, and a cap 4, wherein a plurality of convex portions 21 are provided on a body portion 24 of the bottle 2. And / or the concave portion 22 is provided, and at least the body portion 24 is covered with the heat insulating sheet 3. 2. The drinking water container 1 according to claim 1, wherein the heat insulating sheet 3 has at least a layer made of a foamed plastic sheet. 3. The drinking water container 1 according to claim 1, wherein the heat insulating sheet 3 is a sheet in which a plastic film is bonded to a surface of a foamed plastic sheet. 4. The drinking water container 1 according to claim 1, wherein the heat insulating sheet 3 has heat shrinkability. 5. The capacity of the bottle 2 is 350-1000.
The drinking water container 1 according to any one of claims 1 to 4, wherein the container 1 is ml.