TWI851487B - Drink Containers - Google Patents

Abstract

The present invention provides a beverage container which can suppress the generation of condensation and suppress the transfer of heat from the beverage poured into the container to the outer surface of the container. The beverage container 1 is a double-structured beverage container 1 with a bottomed cylindrical shape and capable of accommodating beverages, and comprises: an impermeable layer 20, which forms an inner surface 15 in contact with the injected beverage and prevents liquid from passing therethrough; and a water-absorbing layer 30, which is arranged on the outer side of the impermeable layer 20, has an outer surface 31 exposed to the outside, and is made of porous ceramic; a space 40 is formed between the impermeable layer 20 and the water-absorbing layer 30, the impermeable layer 20 has a green layer 21 made of porous ceramic, and a glassy inner coating 22 covering a surface 211 of the green layer 21 on the opposite side of the space 40, and the water-absorbing layer 30 absorbs liquid from the micropores of the outer surface 31 exposed to the outside.

Description

Drink Containers

The present invention relates to a beverage container.

In the past, a beverage container that can hold beverages is known. For example, Patent Document 1 describes a tableware having a vessel made of unglazed ceramic and a resin film layer covering a portion of the vessel.

[Prior Art Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2017-143966

However, from the perspective of ease of use, beverage containers such as cups are expected to have the following structure: even when the ambient temperature is high and the beverage poured in is cool, condensation is not easy to form on the outer surface, and even when hot beverages are poured in, heat is not easy to transfer to the outer surface. In the beverage container of Patent Document 1, although the condensation generated can be absorbed by the lower part of the container body, there is room for improvement in terms of heat insulation.

The purpose of the present invention is to provide a beverage container that can inhibit the generation of condensation and inhibit the transfer of heat from the beverage poured into the container to the outer surface of the container.

The present invention relates to a beverage container, which is a bottomed cylindrical beverage container with a double structure capable of accommodating beverages, and comprises: an impermeable layer, which forms an inner surface in contact with the injected beverage and prevents liquid from passing through; and a porous water-absorbing layer, which is arranged on the outer side of the impermeable layer and has an outer surface exposed to the outside; a space is formed between the impermeable layer and the water-absorbing layer.

The impermeable layer comprises a porous green layer and a glassy inner coating covering the surface of the green layer opposite to the space.

The surface of the water-absorbing layer on the opening side for injecting beverages and opposite to the space is covered with a glassy outer coating.

The water-absorbing layer is composed of ceramics with a porosity of 11% to 48% and a median pore diameter of 0.7μm to 13.2μm.

According to the present invention, it is possible to suppress the generation of condensation and suppress the transfer of heat from the beverage poured into the container to the outer surface of the container.

1: Drink container

1a, 1b, 1c: Molded objects

11: Bottom

12: Side

13: Open mouth

14: Containment Department

15: Inner surface

20: Impermeable layer

21: Green layer

22: Inner coating

30: Water absorption layer

31: External surface

40: Space

50: External coating

60: 1st plaster mold

61: Lower mold

62: Upper mold

70: Second plaster mold

71: Lower mold

72: Upper mold

121: Upper Edge

211: Surface

611: Bottom

612: convex part

613: Side wall

621: Open your mouth

711: Groove

721: Open your mouth

[Figure 1] is a three-dimensional diagram of a beverage container in one embodiment of the present invention.

[Figure 2] is a side view of a beverage container showing one embodiment of the present invention.

[Figure 3] is a top view of a beverage container showing one embodiment of the present invention.

[Figure 4] is a bottom view of a beverage container showing one embodiment of the present invention.

[Figure 5] is a cross-sectional view of the beverage container shown in Figure 3 along the V-V line.

[Figure 6] is a longitudinal cross-sectional view of the first plaster mold used in the manufacture of a beverage container in one embodiment of the present invention.

[Figure 7] is a longitudinal cross-sectional view of the second plaster mold used in the manufacture of a beverage container in one embodiment of the present invention.

[Figure 8] is a longitudinal cross-sectional view of the first plaster mold after pouring the slurry into the first plaster mold and draining the excess slurry.

[Figure 9] is a longitudinal cross-sectional view of the second plaster mold after pouring the slurry into the second plaster mold and draining the excess slurry.

[Figure 10] is a schematic diagram showing the molded product taken out from the plaster mold.

The following describes the implementation forms of the present invention. However, the present invention is not limited to the following implementation forms.

The beverage container 1 of this embodiment is described with reference to Figures 1 to 5. Figure 1 is a three-dimensional view of the beverage container 1. Figure 2 is a side view of the beverage container 1. Figure 3 is a top view of the beverage container 1. Figure 4 is a bottom view of the beverage container 1. Figure 5 is a cross-sectional view of the beverage container 1 shown in Figure 4 along the V-V line.

The beverage container 1 is a container for containing beverages. The beverage container 1 is a bottomed cylindrical container having a bottom 11, a side 12, and an opening 13 opposite to the bottom 11 for pouring beverages.

As shown in FIG. 4 , the bottom 11 is circular when viewed from above, but its shape is not particularly limited. For example, the bottom 11 may be elliptical or polygonal when viewed from above.

As shown in FIG. 2 , the side portion 12 is a portion that rises from the peripheral portion of the bottom portion 11. The beverage injected from the opening 13 is received in the space surrounded by the bottom portion 11 and the side portion 12, i.e., the receiving portion 14.

As shown in FIG5 , the bottom 11 and the side 12 are composed of a double structure having an impermeable layer 20 and a water-absorbing layer 30. That is, the beverage container 1 is a double-structured container that can accommodate beverages and has an impermeable layer 20 and a water-absorbing layer 30.

The impermeable layer 20 is a layer that forms the inner surface 15 that contacts the beverage injected from the opening 13 and does not allow liquid to pass through. The impermeable layer 20 has a green layer 21 and an inner coating film 22. The thickness of the impermeable layer 20 is preferably 4mm~5mm.

The green layer 21 is a layer composed of porous ceramics with water absorption. The green layer 21 preferably has a porosity of 11% to 48% and a median pore diameter of 0.7 μm to 13.2 μm. In addition, the thickness of the green layer 21 is preferably 4 mm to 5 mm.

The inner coating film 22 is a film that does not allow liquid to pass through. The inner coating film 22 covers the surface 211 of the green layer 21 on the side of the receiving portion 14. In this embodiment, the surface 211 of the green layer 21 on the side of the receiving portion 14 is entirely covered by the inner coating film 22. That is, the inner surface 15 of the beverage container 1 is entirely formed by the inner coating film 22.

The inner coating 22 is made of glass, for example. Examples of glass materials include glaze. The inner coating 22 of this embodiment is formed by applying glaze on the surface 211 of the green layer 21. The micropores on the surface 211 of the green layer 21 are sealed by the glaze. The beverage container 1 is formed by the inner coating 22 so that the beverage contained in the storage portion 14 of the beverage container 1 does not pass through the green layer 21 from the inner surface 15.

The water-absorbing layer 30 is a layer composed of porous ceramics and arranged outside the impermeable layer 20. The water-absorbing layer 30 has an outer surface 31 exposed to the outside. The water-absorbing layer 30 is porous, so its micropores are exposed to the outside. With this structure, for example, even if a cooler beverage is poured into the beverage container 1 and the surrounding temperature is high, a temperature difference between the inside and outside of the container is generated, and condensation is easily formed on the bottom 11 or the side 12, the liquid is absorbed by the micropores existing in the outer surface 31, so condensation can be suppressed.

The water-absorbing layer 30 preferably has a porosity of 11% to 48% and a median pore diameter of 0.7μm to 13.2μm. This improves the absorbency of the micropores to liquids, and can more reliably prevent condensation. Furthermore, the thickness of the water-absorbing layer 30 is preferably 4mm to 5mm.

The water-absorbing layer 30 is connected to the green layer 21 at the upper edge 121 of the side portion 12 of the beverage container 1. In this embodiment, the water-absorbing layer 30 and the green layer 21 are formed integrally.

In addition, in this embodiment, as shown in FIG. 1 and FIG. 2 , the outer surface 31 of the water-absorbing layer 30 has fine holes that can prevent condensation, and is formed into a scale shape. As a result, the outer surface 31 is not easy to slip, so it is easy for the user to hold it. In addition, each scale forming the scale-shaped outer surface 31 can have a concave-convex structure. As a result, the outer surface 31 is even less likely to slip.

A space (hollow portion) 40 is formed between the impermeable layer 20 and the water-absorbing layer 30. The space 40 is formed continuously from the bottom 11 and from the center of the side 12 in the axial direction of the beverage container 1 to the upper edge 121. This prevents the heat of the beverage injected into the receiving portion 14 from being transferred to the water-absorbing layer 30 side through the impermeable layer 20. Furthermore, the space 40 can also be formed continuously from the bottom 11 to the upper edge 121 of the side 12. The thickness of the space 40, that is, the interval between the impermeable layer 20 and the water-absorbing layer 30, is preferably 1mm~15mm except for the side of the opening 13 in the side 12.

As shown in FIG. 2 and FIG. 4 , in the water-absorbing layer 30 of this embodiment, the part of the side 12 other than the opening 13 side is exposed to the outside. That is, the outer surface 31 of the water-absorbing layer 30 exposed to the outside is an area covering the part of the side 12 other than the opening 13 side and the entire bottom 11. The area of the water-absorbing layer 30 on the opening 13 side including the upper edge 121 is covered by the outer coating film 50 that does not allow liquid to pass through. Specifically, the outer coating film 50 covers the surface of the water-absorbing layer 30 on the opening 13 side that is opposite to the space 40.

The outer coating 50 is made of glass, for example. In this embodiment, the outer coating 50 is made of the same raw material as the inner coating 22. The surface of the outer coating 50 of this embodiment is made of glass and is a smooth surface. As a result, the area on the side of the opening 13 of the side 12 that the lips of the user touch when drinking a beverage is covered, so that the mouth can feel good. Furthermore, in this embodiment, the outer coating 50 and the inner coating 22 are connected at the upper edge 121.

In addition, the beverage container 1 can also be regarded as a container having a double structure, which includes an inner container with a bottomed cylindrical shape and an outer container with a bottomed cylindrical shape that is larger than the inner container. The inner container is arranged inside the outer container. Regarding the inner container and the outer container, the peripheral parts of the opening 13 sides thereof are connected to each other, and the other parts are arranged with a space 40 between them. That is, the inner container is formed by the impermeable layer 20, and the outer container is formed by the water-absorbing layer 30.

[Manufacturing method of beverage container]

Next, the manufacturing method of the beverage container 1 of this embodiment is described.

The manufacturing method of the beverage container 1 of this embodiment comprises: (1) a mud adjustment step, (2) a forming step, (3) a drying step, (4) a bisque firing step, (5) a glazing step, and (6) a calcining step.

In the mud adjustment step, aluminum oxide, calcium oxide, alkaline metal oxides, silicon dioxide, water, etc. are mixed on an oxide basis to obtain fluid mud.

In the forming step, a formed object can be obtained from the mud by using the gypsum mold for mud casting. Specifically, in the forming step, the mud obtained in the mud adjustment step is poured into the gypsum mold and left for a certain period of time (e.g., about 40 minutes). After the mud adheres to the wall of the gypsum mold until the desired wall thickness is reached, the remaining excess mud that is not attached is discharged from the gypsum mold. Then, it is dried for a certain period of time (e.g., about 1 hour) and the hardened green body is taken out.

The plaster molds used in the forming step and the details of the forming step are described with reference to FIGS. 6 to 10. FIG. 6 is a cross-sectional view of the first plaster mold 60, and FIG. 7 is a cross-sectional view of the second plaster mold 70. FIG. 8 is a cross-sectional view of the state where excess slurry is discharged after pouring slurry into the first plaster mold 60, and FIG. 9 is a cross-sectional view of the state where excess slurry is discharged after pouring slurry into the second plaster mold 70. FIG. 10 is a cross-sectional view showing the formed objects 1a and 1b taken out from the first plaster mold 60 and the second plaster mold 70.

The first plaster mold 60 includes: a lower mold 61, which forms the side portion 12 on the side of the upper edge portion 121 of the beverage container 1; and an upper mold 62, which forms the impermeable layer 20 in the bottom 11 and the side portion 12 except the portion formed by the lower mold 61. Specifically, the lower mold 61 has a curved convex portion 612 protruding from its bottom 611, and a side wall 613 rising from the bottom 611 in a manner of surrounding the outer side of the convex portion 612. The upper mold 62 is a cylindrical mold as a whole, and has an opening 621. In the molding step, as shown in FIG. 6, the slurry is poured from the opening 621 of the upper mold 62 in a state where the first plaster mold 60 is closed. Then, as shown in FIG8 , the impermeable layer 20 in the bottom 11 of the beverage container 1 and the formed object 1a which becomes the side 12 are formed by the surface of the protrusion 612 and the inner peripheral surface of the upper mold 62.

The second plaster mold 70 has a lower mold 71 having a groove 711 and an upper mold 72 having an opening 721. As shown in FIG7 , the second plaster mold 70 is closed and the slurry is poured from the opening 721 of the upper mold 72. Then, as shown in FIG9 , the inner peripheral surface of the groove 711 and the surface of the upper mold 72 facing the bottom surface of the groove 711 form a molded object 1b that becomes the water absorption layer 30 in the bottom 11 of the beverage container 1.

As shown in FIG10 , the green pieces, i.e. the formed objects 1a and 1b, which have been dried for a certain period of time (e.g., about 1 hour) and hardened, are taken out from the plaster mold and welded together to obtain the formed object 1c which becomes the beverage container 1.

In the drying step, the formed product 1c formed in the forming step is dried for about 1 hour, taken out from the filter mold, and dried for about 1 day. The drying time in the drying step can be appropriately set according to the temperature or humidity. The drying in the drying step is performed, for example, in an environment of 25°C and 60% humidity.

In the bisque firing step, the formed product 1c dried in the drying step is fired. More specifically, the formed product 1c dried in the drying step is first subjected to burr treatment. In the burr treatment, the burrs, which are unnecessary parts of the product, are cut off from the formed product 1c. Thereafter, the formed product 1c subjected to the burr treatment is fired in a bisque firing furnace at about 930°C for about 8 hours.

In the glazing step, glaze is applied only to the inner surface and the opening side of the side of the formed object 1c fired in the bisque firing step.

In the firing step, the glazed molded product is fired. The glazed molded product is fired at about 1250°C for 12 hours. In the firing step, the water-insoluble organic particles contained in the molded product are decomposed to form many fine pores. In addition, fine pores are also formed by the evaporation of residual water in the molded product. In addition, since it is fired at a high temperature, a beverage container 1 with excellent water absorption, heat preservation, and cold preservation can be manufactured. After the above steps, a beverage container 1 is manufactured.

According to the beverage container 1 of this embodiment, the following effects can be obtained.

(1) The beverage container 1 is configured as follows: it is a bottomed cylindrical container with a double structure capable of accommodating beverages, and has an inner surface 15 in contact with the injected beverage, an impermeable layer 20 that does not allow liquid to pass through, and a porous water-absorbing layer 30 disposed on the outer side of the impermeable layer 20 and having an outer surface 31 exposed to the outside, and a space 40 is formed between the impermeable layer 20 and the water-absorbing layer 30. In this way, since the porous water-absorbing layer 30 is exposed to the outside, the generation of condensation can be suppressed even when a relatively cool beverage is injected into the container. Furthermore, even when a hot drink is poured into the container, since there is a space 40 between the impermeable layer 20 in contact with the drink and the water-absorbing layer 30 exposed to the outside for the user to hold, heat transfer from the impermeable layer 20 to the water-absorbing layer 30 is suppressed. Therefore, the generation of condensation can be suppressed, and heat transfer from the drink poured into the container to the outside can be suppressed.

(2) The impermeable layer 20 of the beverage container 1 can be configured as follows: a porous green layer 21 and a glassy inner coating 22 covering the surface 211 of the green layer 21 opposite to the space 40. Thus, since two porous layers are formed with the space 40 interposed therebetween, the effect of suppressing the formation of condensation on the outer surface 31 of the beverage container 1 and the heat insulation effect from the inside of the container to the outside can be further improved.

(3) The water absorption layer 30 of the beverage container 1 can be configured as follows: the surface on the side of the opening 13 for beverage injection and opposite to the space 40 is covered with a glass outer coating 50. As a result, the area on the side of the opening 13 that the lips of the user touch when drinking the beverage is covered with glass, so that the mouth feels good.

(4) The water absorption layer 30 of the beverage container 1 can be made of ceramic with a porosity of 11-48% and a median pore diameter of 0.7-13.2 μm. This can further improve the water absorption of the water absorption layer 30.

The above describes the implementation form of the present invention, but the present invention is not limited to the above implementation form and can be appropriately modified.

In the above-mentioned embodiment, the water-absorbing layer 30 is covered by the outer coating film 50 on the side of the opening 13, but it can also be a structure in which the surface of the water-absorbing layer 30 opposite to the space 40 is not covered by the outer coating film 50 and is entirely exposed to the outside. In this way, condensation can be reliably prevented.

In the above-mentioned embodiment, the non-transparent layer 20 is formed by the porous green layer 21 and the inner coating film 22, but it can also be composed of only the inner coating film 22.

In this embodiment, the outer surface 31 of the water-absorbing layer 30 is formed into a scale shape, but it may not be formed into a scale shape.

1: Beverage container 11: Bottom 12: Side 13: Opening 14: Receiving part 15: Inner surface 20: Impermeable layer 21: Green layer 22: Inner coating 30: Water absorption layer 31: Outer surface 40: Space 50: Outer coating 121: Upper edge 211: Surface

Claims (3)

A beverage container is a double-structured beverage container having a bottomed cylindrical shape and capable of accommodating beverages, and comprises: an impermeable layer, which forms an inner surface in contact with the injected beverage and does not allow liquid to pass through; and a water-absorbing layer, which is arranged on the outer side of the impermeable layer, has an outer surface exposed to the outside, and is composed of porous ceramics; a space is formed between the impermeable layer and the water-absorbing layer, the impermeable layer has a green layer composed of porous ceramics, and a glassy inner coating film covering the surface of the green layer opposite to the space, the water-absorbing layer absorbs liquid from the micropores of the outer surface exposed to the outside. A beverage container as claimed in claim 1, wherein the surface of the water-absorbing layer on the opening side for injecting beverages and opposite to the space is covered with a glassy outer coating. A beverage container as claimed in claim 1 or 2, wherein the water-absorbing layer is made of a ceramic having a porosity of 11% to 48% and a median pore diameter of 0.7 μm to 13.2 μm.