JPS63203555A - Vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] I. Background of the invention Technical field The present invention relates to containers, particularly containers with good heat retention properties.

Prior art and its problems Ceramics are usually used for containers such as tableware and tea utensils that are used on a daily basis.

These containers, for example, various cups, bowls, sake bottles, sake cups, tea bowls, teapots, etc., require heat retention. However, although ceramics have sufficient texture, feel, volume, etc., they are insufficient in terms of heat retention.

By the way, a typical example of a container with good heat retention is a so-called thermos flask. However, although this product has excellent heat retention, it has a complicated structure, is too heavy, and is expensive, so although it is suitable for storing a certain amount of volume for a certain amount of time, it is not suitable for storing things like the above. Do not put it in containers for everyday use. Also, the texture when held in the hand cannot be changed enough.

Furthermore, with recent changes in eating habits, various instant foods, retort foods, and the like have come into use. The container can be made of synthetic resin or its laminate (Utility Model Publication No. 57-19943).
No. 4, No. 57-199436, No. 59-68932, etc.), metal foil such as aluminum foil, steel foil, etc. 5. Laminated bodies of synthetic resin and metal foil (Japanese Patent Laid-open No. 58-112732, etc.), paper and aluminum Examples include a laminate with foil (Japanese Utility Model Publication No. 57-101706, etc.). Although these types of containers exhibit some degree of heat retention, they are still insufficient and are lightweight, so they are suitable for disposable containers, but they are not suitable for use as containers for everyday use as mentioned above. Compared to iiz, etc., the texture, volume, and tactile sensation when held in the hand are insufficient and unsatisfactory.

■Object of the Invention The object of the present invention is to provide a container that is suitable for everyday use such as tableware and tea utensils, has good heat retention, and is satisfactory in terms of texture, feel, volume, etc.

■Disclosure of invention These objects are achieved by the invention described below.

That is, the present invention is a container characterized in that a base material 1 containing inorganic hollow spheres and an inorganic binder is coated with a glass material.

■Specific structure of the invention Hereinafter, a specific configuration of the present invention will be explained in detail.

FIG. 1 shows an embodiment of the present invention.

The container 1 of the present invention has a vitreous coating 12 on a base material 11 containing inorganic hollow spheres and an inorganic binder.

Inorganic hollow spherical bodies include Shirasu balloons made from natural volcanic glass, microballoons (registered trademark) made from artificial materials such as borosilicate glass, and glassy volcanic rocks (perlite, obsidian, etc.). ) and glass balloons such as perlite balloons that have partition walls inside.

In this case, the size of the hollow spherical body is 20 to 200 in diameter.
The thickness may be approximately 2 to 20 μm, preferably 50 to 100 μm.

The reason for choosing such a size is that if the diameter is less than 20 μm, a large amount of inorganic binder will be used to bond the hollow spheres, resulting in poor insulation properties, and if the diameter exceeds 200 μm, the machine of the base material 11 as a heat insulating layer will deteriorate. This is because the target strength decreases too much.

Further, if the thickness is less than 2 μm, the strength of the hollow spherical body itself is low and the hollow spherical body is likely to be destroyed in the manufacturing process, and if the thickness exceeds 20 μm, the heat insulation properties will deteriorate.

The content of inorganic hollow spheres is 50 to 90% of the entire base material.
It may be set to wt%, preferably 60 to 80 wt%.

The reason for setting this content is that if it is less than 50 wt%, the heat insulation properties will be poor, and if it exceeds 90 wt%, the mechanical strength will be low.

Examples of the inorganic binder include clay, various types of glasses, and various other ceramic materials.

The base material for forming the base material 11 includes various resins used as binders (for example, methyl cellulose resin,
Polyvinyl alcohol resin, acrylic resin, etc.) and various other additives (for example, dispersant, etc.) may be contained.

The thickness of the base material 11 varies depending on the intended use and size of the container, but is approximately 1 to 5 mm.

In this case, if it is too thin, the mechanical strength will be low, and if it is too thick, the container will lose its sense of volume, such as its lightness.

Examples of the glassy coating 12 include those commonly used as glazes or glazes for ceramics.

The thickness of this coating 12 is usually about 50 to 500 μm, preferably about 100 to 200 μm.

This thickness is chosen because if it is less than 50 μm, the coating such as glaze is likely to crack during firing, and if it exceeds 500 μm, it will be difficult to obtain a uniform coating.

A method for manufacturing the container of the present invention will be described below.

The weight ratio of inorganic hollow spheres and inorganic binder is 50:4.
If necessary, add about 1 to 2 wt% of a binder to 100 parts by weight of a mixture of 0 to 90:10, add other additives as appropriate, add an appropriate amount of a solvent such as water, and mix using a kneader, mixer, etc. .

This material is molded using a potter's wheel, casting, pressing, etc. in the same way as when making ceramics. After drying the molded product at room temperature, it is calcined at a temperature of SOO to 800°C for about 2 to 4 hours.

Then, for example, in the case of glaze, a suspension of water is added to the surface of the calcined material to form a glassy film.

Then, it should be fired. Firing at a temperature of 1000N
What is necessary is just to carry out at 1200 degreeC for about 2 to 4 hours.

(2) Specific Effects of the Invention The container of the present invention has a vitreous coating on a base material containing inorganic hollow spheres and an inorganic binder, and has excellent heat retention. Therefore, it is effective when applied to containers that require heat retention, such as tableware and tea utensils used on a daily basis.

Also, the texture when held in the hand is comparable to that of ceramics. Moreover, it can be manufactured by following general ceramic manufacturing processes, such as potter's wheel molding, casting, or press molding, and is excellent in mass production, and its structure is simple.

Therefore, the present invention is useful as cups, bowls, tea bowls, sake bottles, choko cups, teapots, plates, and the like.

The present inventors conducted various experiments to confirm the effects of the present invention, particularly the heat retention effect. An example is shown below.

Experimental Example 1.5 parts by weight of methyl cellulose resin was added to 100 parts by weight of a mixture of Shirasu balloon (diameter 70 μm, wall thickness 5 μm) and clay at a weight ratio of 75:25, water was further added, and the mixture was mixed in a kneader. did.

This mixture was molded on a potter's wheel into the shape of a teacup as shown in FIG.

It was dried at room temperature for 24 hours, and then calcined at a temperature of 750°C for 2 hours.

A suspension of glaze and water was applied to the surface of the calcined product.

This was fired at 5 temperatures of 1150° C. for 2 hours to obtain a tea bowl as shown in FIG.

In this case, the size of the bowl is 5 cm in diameter and 10 cm in height.
The thickness of the base material is 3 mm, and the thickness of the glassy coating is 150 μm.
And so.

Separately, a comparative ceramic bowl of the same size as the above was produced. In this case, the tea bowl for comparison is one in which the base material is only clay.

150 mI for these two bowls! , and measured the change in water temperature over time.

The results are shown in Table 1 below.

Table 1 After 15 minutes After 30 minutes From the results shown in Table 1, it can be seen that the heat retention properties are significantly improved by the present invention.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention. Explanation of symbols 1...container, 11...Base material, 12...Coating

Claims (1)

[Claims] A container characterized by having a vitreous coating on a substrate containing inorganic hollow spheres and an inorganic binder.