JPH0870972A - High safety flatware/hollowware and manufacture of the same - Google Patents

Abstract

PURPOSE: To prevent slipping off, decrease impact sounds, and preclude damage resulting from collision by furnishing an elastomer layer from around the center of the outside bottom surface toward the peripheral edge over a certain specified portion of the whole areas of the bottom and side surface on such a way as having a specific layer thickness and in a strong and tight attachment. CONSTITUTION: A piece 1 of flatware or hollowware of glass or porcelain is provided with a 0.1-2mm thick elastomer layer 2 in tight attachment from around the center of the outside bottom surface toward the peripheral edge over a certain portion at least 30% of the whole areas of the bottom and side surfaces. The elastomer layer consists of any material of polychloroprene, acrylonitrile rubber, butadiene-stylene, natural rubber, fluorine rubber, silicone rubber series, etc. The adhesive composition for it is favorably of a type hardening in a short time, presenting a good resistance against heat, water, and coldness, and also preventing well the electrostatic charge, and one preferable example is a liquid-form silicone rubber composition having adhesiveness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when placed on a tray or a table, does not slide even when tilted, and when a plurality of sheets are piled up, mutual impacts are alleviated to generate noise. , Or damage caused by contact,
Further, the present invention relates to a tableware having a high degree of safety in which fragments are not scattered even if the tableware is dropped on a floor or the like and destroyed, and a manufacturing method thereof.

[0002]

2. Description of the Related Art It is known to attach a rubber ring to the bottom of a glass cup or a pottery tableware to prevent slipping. However, these have some effects in terms of non-slip and reduction of contact noise, but during long-term use, dirt adheres to the periphery of the ring, which becomes unsanitary and drops on the floor. There is no way to prevent the fragments from scattering when destroyed.

It is also practiced to cover the entire cup with a plastic protective film. Although this is effective for preventing the scattering of fragments when dropped or broken, the material of the cup, that is, glass. In addition to reducing the advantages of, it is easily soiled and lacks durability.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides tableware improved so as not to impair the preferable physical properties of glass and ceramics, exhibiting a high degree of safety, and being beautiful in appearance. It was made for the purpose.

[0005]

The inventor of the present invention is not only slippery when placed on a tray or a table, but also has a low hitting sound when they come into contact with each other, and is broken when dropped and destroyed. In order to develop tableware that does not scatter, as a result of repeated intensive research, an adhesive composition is attached to the bottom of an ordinary plate-shaped or bowl-shaped glass or ceramic tableware to form an elastomer layer. It was found that the object can be achieved by the above, and the present invention was completed based on the finding.

That is, the present invention relates to a plate-shaped or bowl-shaped tableware made of glass or ceramics, and at least 3 of the total area of the bottom surface and the side surface from the center of the outer bottom surface toward the peripheral edge.
Provided is a highly safe tableware, which is characterized in that a strongly adhered elastomer layer having a layer thickness of 0.1 to 2 mm is provided to 0%.

Such tableware is, for example, at least 30% or more of the total area of the bottom surface and the side surface from the vicinity of the center of the outer bottom surface of the plate-shaped or bowl-shaped tableware made of glass or ceramics to the peripheral edge, and an elastomeric cured product. The adhesive composition capable of forming is adhered so that the layer thickness after curing is 0.1 to 2 mm, and then the composition is cured.

In this case, as the glass or ceramics tableware, it is possible to use the ordinary ones that have been generally used and are commercially available. There is no particular limitation on the size, and it can be from a small plate or bowl with a diameter of about 5 cm to 5
Any plate or bowl of 0 cm or more can be used. The present invention has some effect even when applied to those having an edge on the bottom surface, a cup shape, a wine glass shape, but when applied to a dish shape or a bowl shape having a smooth bottom shape. , Especially high fracture resistance and shatterproof property.

In the present invention, the elastomer layer provided on the outer surface of the tableware may be formed of an elastomer such as polychloroprene type, acrylonitrile rubber type, butadiene-styrene rubber type, natural rubber type, fluororubber type, silicone rubber type. it can. The elastomer layer may have a JIS-A hardness of 20 or more, preferably 30 or more, a tensile strength of 20 kgf / cm ² or more, preferably 30 kgf / cm ² or more, and an elongation of 200% or more, preferably 250% or more. desirable.

This elastomer layer has a layer thickness of 0.1 to 2 m.
m, preferably 0.2 to 1 mm. If it is thinner than this, the effect of anti-slip is achieved, but the effect of mitigating impact noise, preventing damage due to contact, and preventing scattering of fragments at the time of breaking becomes insufficient, and if thicker than this However, not only the desirable feel of the material of the tableware, that is, the glass and the ceramics is diminished, but also the appearance is deteriorated.

The elastomeric layer is then at least 30%, preferably 45%, of the total area of the bottom and sides of the tableware.
It is necessary to provide it over the above. Even if it is provided in a smaller area than this, the effect of preventing slippage is exhibited, but the effect of reducing contact noise and preventing scattering of fragments at the time of breakage is insufficient. Of course, if desired, it can be provided over the entire surface from the bottom surface to the side surface, but normally, the range of 45 to 70% is sufficient for reducing contact noise and preventing scattering of fragments.

The elastomer layer can be provided in any shape depending on the shape of the tableware, such as a circular shape, a square shape, a star shape, a flower piece shape, a donut shape, etc. preferable.

If desired, the elastomer layer may be colored by adding a coloring agent, or various patterns such as letters and patterns may be applied. By doing so, it can also serve as decoration, and the commercial value can be further enhanced.

Next, in the method of the present invention, the adhesive composition for forming the elastomer layer on the outer surface of the tableware is an elastomer which does not have a strong tackiness so that a slight elasticity is felt when touched with a finger after curing. There is no particular limitation as long as it is a resin that strongly adheres to glass or ceramics, but it is preferable that it cures in a short time, shows good heat resistance, water resistance, cold resistance after curing, and has antistatic properties. Examples of such materials include cyanoacrylate adhesives, nitrile-epoxy adhesives, phenolic nitrile rubber adhesives, phenolic chloroprene adhesives, polyurethanes, which have strong adhesion to commercially available glass and ceramics. Adhesive liquid silicone rubber compositions are particularly preferable, although there are system adhesives and the like. Examples of the adhesive liquid silicone rubber composition include polyalkylalkenylsiloxane having an alkyl group having 1 to 18 carbon atoms and an alkenyl group having 2 to 8 carbon atoms, and polyalkylalkenyl siloxane having an alkyl group having 1 to 18 carbon atoms. Examples thereof include hydrogen. These adhesive compositions are commercially available products such as one-component RT.
V rubber (manufactured by Shin-Etsu Chemical Co., Ltd.), one-component adhesive liquid silicone rubber TSE32XX series, two-component liquid silicone rubber for molding (both manufactured by Toshiba Silicone Co., Ltd.) and Cemedine Super X (Cemedine Co., Ltd.) What is available as a product) can be used as it is or after being diluted. If desired, auxiliary components such as a crosslinking acceleration catalyst, an adhesion improver and an inorganic filler can be added and used.

In order to adhere the above-mentioned adhesive composition to a plate-shaped or bowl-shaped tableware made of glass or ceramics, it is applied by using a coating device such as a roll coater, a doctor knife, a brush or spray coating. Alternatively, it can be performed by dipping or by any method. Further, the bottom of the tableware can be partially dipped in the liquid adhesive composition, or the liquid adhesive composition can be dropped and retained and naturally spread to form a special shape. As for glass tableware, it is advantageous to apply a transparent or opaque liquid adhesive composition with a brush and heat-cur it while leaving the pattern of the brushes, because it is possible to obtain tableware having a high-class appearance. Is.

Next, it is necessary to cure the one to which the adhesive composition is attached. This curing is usually performed in an electric furnace at 120
It is carried out by heating at ˜180 ° C. for 2 to 10 minutes. In the case where the adhesive composition is a self-hardening composition that is cured by oxygen or moisture in the air, it may simply be left in the air.

Next, an example of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a bottom view showing an example of a flat plate of the present invention, and FIG. 2 is a side view of the same. In these figures,
An elastomer layer 2 is provided on a part of the outer bottom surface of the flat plate body 1. In this example, a circular elastomer layer is formed around the center of the bottom surface, but as described above, this shape can be arbitrarily selected. Further, FIG. 3 is a side view of an example in which a transparent liquid adhesive composition is brush-painted on almost the entire outer surface of the bowl-shaped glass tableware to form a brush pattern.

[0018]

EFFECTS OF THE INVENTION The tableware of the present invention has the above-mentioned structure, so that when it is placed on a tray or a table, it does not slip even if it is tilted at a considerable angle, and several tableware are stacked and moved. Also in the case of collision, the collision noise can be reduced, and damage due to mutual collision can be prevented. Further, even when the pieces fall on the floor and are broken, the pieces are in a continuous state with each other through the elastomer layer and do not scatter around. Furthermore, if a transparent elastomer layer is provided on the glass tableware with brush eyes, the glass tableware can have a feeling of high quality.

[0019]

EXAMPLES The present invention will be described in more detail with reference to examples.

Example 1 Cemedine silicone sealant 8060 (manufactured by Cemedine Co., Ltd.) was applied in a circular shape with a diameter of 12 cm to the outer bottom of a pottery round plate having a diameter of 15 cm and a thickness of 4 mm, and left at room temperature for 24 hours. Then, it was cured to form a light gray elastomer layer having a layer thickness of 1 mm. The area occupied by this elastomer layer was slightly elastic when touched with about 64% of the total bottom area. This elastomer layer had a JIS-A hardness of 39, a tensile strength of 25 kgf / cm ² and an elongation of 215%.

When this product was dropped on the flooring floor while increasing the height and subjected to a destructive test, it was 50
Although it was destroyed by dropping from a height of cm, the fragments were connected to each other by the elastomer layer and did not scatter around.

For comparison, the same circular plate without an elastomer layer was subjected to a destructive test and found to be 30 cm.
It is destroyed by falling from the height of the
It scattered over 0 cm.

Example 2 On the bottom of an ordinary glass round plate having a diameter of 15 cm and a thickness of 3 mm,
Cemedine Super X No. 8008 (manufactured by Cemedine Co., Ltd.) was applied to provide an elastomer layer having a diameter of 8.5 cm and a layer thickness of 0.1 mm. The occupied area of this elastomer layer was about 32% of the total bottom area. This elastomer layer has a JIS-A hardness of 25 and a tensile strength of 20 kgf / cm.
² showed an elongation of 400%.

The thus-obtained dishware was subjected to the same breaking test as in Example 2. When it was broken by dropping from a height of 200 cm, no scattering of broken pieces was observed.

For comparison, a destructive test was conducted on the same round plate without the elastomer layer.
It was destroyed by falling from a height of 0 cm, and the fragments scattered about a diameter of 150 cm around the dropping point.

Example 3 A round glass plate used in Example 2 was used, in which the same adhesive was used, but different thicknesses were used, and a circular elastomer layer having a diameter of 8.5 cm was provided. A destructive test was performed. The results are shown in Table 1.

[0027]

[Table 1]

Example 4 A one-component RTV rubber KE4805 (manufactured by Shin-Etsu Chemical Co., Ltd.) colored by adding a red pigment was used in the same manner as in Example 1 to prepare a pottery round plate having a diameter of 15 cm and a thickness of 3 mm. An elastomer layer having a diameter of 10 cm and a layer thickness of 0.5 mm was provided on the bottom surface of the. The occupied area ratio of this elastomer layer was about 45%. This elastomer layer has JIS-A type hardness of 4
The tensile strength was 0, the tensile strength was 20 kgf / cm ² , and the elongation was 320%.

When the tableware thus obtained was subjected to a drop fracture test on a concrete floor, it was 60 cm.
It was destroyed by a drop from the height of, but no fragments were scattered. Also, the elastomer layer has a diameter of 12 cm and a layer thickness of 0.5 m.
m (occupied area ratio: about 64%) was prepared, and a drop fracture test was conducted in the same manner. As a result, the sample was destroyed by dropping from a height of 70 cm, but no fragments scattered.

Example 5 Polyalkylalkenyl siloxane-based adhesive liquid silicone rubber (Toshiba Silicone Co., Ltd., trade name TSE3
212) To 100 parts by weight of toluene, add 30 parts by weight of toluene, mix well, apply a brush over the entire bottom surface of an ordinary glass round plate having a diameter of 15 cm and a thickness of 3 mm, leave it for 10 minutes for leveling, and then put it in an electric furnace. By putting in, drying at 100 ° C. for 5 minutes, and further curing at 170 ° C. for 5 minutes, a white elastomer layer having a layer thickness of 0.5 mm was formed over the entire bottom surface portion. This elastomer layer is J
The IS-A type hardness was 50, the tensile strength was 41 kgf / cm ² , and the elongation was 260%. Table 2 shows the results of the drop fracture test on the concrete floor of the glass plate thus obtained.

Example 6 100 parts by weight of silicon dioxide-containing polyalkylalkenyl siloxane liquid silicone rubber (manufactured by Toshiba Silicone Co., Ltd., trade name: TBE3453T) was added to 10 parts by weight of crosslinkable silicone rubber and an adhesiveness improver (manufactured by Toshiba Silicone Co., Ltd.). , Trade name XE15-A2379) 3 parts by weight and 50 parts by weight of toluene were added to the liquid adhesive composition, and the vicinity of the center of the bottom of a glass small bowl having a diameter of 12 cm, a depth of 4.5 cm and a thickness of 2 mm was immersed. , Take it out with it attached,
It was left still with its bottom part facing up, and the deposit was allowed to flow naturally.

Then, this was cured in the same manner as in Example 5 to form a white elastomer layer having a layer thickness of 1.0 mm and an occupied area ratio of 32% and having a flow pattern around the periphery. This elastomer layer has JIS-A type hardness of 40 and tensile strength of 65k.
It showed gf / cm ² and an elongation of 400%. Table 2 shows the results of a drop fracture test on a concrete floor of the glass small bowl thus obtained.

Example 7 Polyalkylalkenyl siloxane liquid silicone rubber (Toshiba Silicone Co., Ltd., trade name TSE345
0) 100 parts by weight of toluene and 30 parts by weight of toluene were mixed to prepare a liquid adhesive composition, and the layer thickness was 0.2 mm over the entire outer surface of the same glass small bowl as used in Example 6.
After applying a brush with, the composition was immediately heat-cured in the same manner as in Example 5 without leveling to form an elastomer layer. Thus, a small bowl having a transparent brush-like appearance as shown in FIG. 3 was obtained. This elastomer layer is JI
The S-A type hardness was 45, the tensile strength was 46 kgf / cm ² , and the elongation was 280%. Table 2 shows the results of the drop fracture test on the concrete floor of the small bowl thus obtained.

[0034]

[Table 2]

As can be seen from this table, there is not much difference between the fracture height and the fragment scattering fracture height due to the size of the occupied area of the elastomer layer. It is possible to increase the height of the scattered fragments.

[Brief description of drawings]

FIG. 1 is a bottom view of an example of a tableware according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a side view of another example of the present invention.

[Explanation of symbols]

 1 Main body 2 Elastomer layer

Claims (9)

[Claims] 1. A plate-shaped or bowl-shaped tableware made of glass or porcelain, which extends from the center of the outer bottom surface thereof toward the peripheral edge,
Highly safe tableware comprising a tightly adhered elastomer layer having a layer thickness of 0.1 to 2 mm over at least 30% of the total area of the bottom surface and side surfaces. 2. The highly safe tableware according to claim 1, wherein the elastomer layer is colored or has a pattern. 3. The highly safe tableware according to claim 1, wherein the elastomer layer is made of silicone rubber. 4. Adhesiveness capable of forming an elastomer-like cured material over at least 30% of the total area of the bottom surface and side surfaces from the vicinity of the center of the outer bottom surface of the plate-shaped or bowl-shaped glass or ceramic tableware toward the periphery. The method for producing highly safe tableware according to claim 1, wherein the composition is applied so that the layer thickness after curing becomes 0.1 to 2 mm, and then the composition is cured. 5. The method according to claim 4, wherein the adhesive composition capable of forming an elastomeric cured product is a thermosetting liquid silicone rubber composition. 6. The method according to claim 4, wherein the curing is carried out by heating at a temperature of 120 to 180 ° C. 7. A high-safety glass tableware comprising a transparent or translucent elastomer layer provided with a brush pattern over substantially the entire outer surface of the plate-shaped or bowl-shaped glass tableware. 8. The high safety glass tableware according to claim 7, wherein the elastomer layer is colored. 9. A layer thickness after curing of a transparent or translucent thermosetting liquid silicone rubber composition over almost the entire surface from the center of the outer bottom surface of a plate-shaped or bowl-shaped glass tableware to the peripheral edge thereof. The method for producing highly safe glass tableware according to claim 7, wherein a brush coating is applied so that the thickness becomes 1 to 2 mm, and then heat curing is performed.