JP2003221079A - Heat insulating container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight heat insulating container having a superior anti-abrasive property, water-proof property and further superior heat insulating property by applying a urethane coating to the heat insulating container having foamed styrol as its base material. <P>SOLUTION: A surface of foamed styrol 1 is coated with acrylic emulsion. Immersion sheet is further immersed to form a ground layer, urethane resin is further applied on it, dried and solidified. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-retaining container, for example, a heat-retaining container for home delivery for carrying meals for nursing care.

[0002]

2. Description of the Related Art Conventionally, when food is conveyed in a heat-insulated state, a hollow plastic container filled with urethane foam or a polystyrene foam container has been used. That is, rice in tableware, miso soup,
Scraps and the like are transported in the above-mentioned plastic container or styrofoam container while being kept warm in a sealed state. Since Styrofoam and urethane foam contain a large amount of air inside, they are widely used as materials for heat insulation containers and heat insulation containers.

[0003]

The problem to be solved is that the hollow plastic container is excellent in heat retaining property and cleaning property, but the mold cost is heavy. Further, the polystyrene foam insulation container is easy to mold and is inexpensive, is lightweight, but is not suitable for cleaning. Further, if the styrofoam is thickened, the heat retention effect is increased, but the transport efficiency becomes a problem.

[0004]

In order to solve the above-mentioned problems, the method for processing the surface of styrofoam has solved the problem of melting the surface of styrofoam by applying a synthetic resin emulsion, for example, an acrylic resin, to the surface. Then, the strength of the styrofoam can be increased by forming an underlayer by impregnating an impregnated sheet, for example, a nonwoven fabric and an acrylic emulsion. Further, the base layer is coated with a synthetic resin resin, for example, a urethane resin to form a heat-insulating coating layer having high adhesion, excellent impact resistance, and weather resistance.

Furthermore, the method is characterized in that a color tone and luster for decorative purposes can be obtained by adding a pigment to the synthetic resin on the outermost surface.

Further, by coating the coated urethane resin with a silicone resin, tableware and the like can be easily held, and vibration noise during transportation and protection of tableware are also characterized.

[0007]

EXAMPLES FIGS. 1 to 5 are views for explaining a method for coating the surface of styrofoam according to the present invention. FIG. 1 shows a base material of a styrofoam molded into a predetermined shape. A surface 2 of the base material 1 is coated with an acrylic emulsion 3 as shown in FIG. 2. In FIG. 3, a nonwoven fabric 4 is further applied. An impregnated state is used as a base layer. The acrylic emulsion and the non-woven fabric may be combined in several layers, if necessary.

In this state, the acrylic emulsion is dried to form the base material 5. In this state, the acrylic emulsion is cured to maintain close contact with the styrofoam, and by further impregnating the non-woven fabric 4, the base layer has rigidity, and the styrofoam becomes difficult to bend even when bent, and cracks do not occur. .

Further, when strength is required, a base layer made of a combination of acrylic emulsion and non-woven fabric is used.
The strength can be increased by using two layers and three layers.

Further, by coating a urethane resin on the underlayer for the purpose of decoration and impact relaxation, the surface of the Styrofoam is coated with a glossy and smooth urethane film as shown in FIG. In addition, impact resistance, which is a characteristic of urethane, is added.

Further, by coating the urethane coating film with silicone resin to improve the holding power of the heat-retaining container and the tableware, it is possible to protect the tableware and suppress the generation of noise during transportation.

[0012]

The following effects can be expected in the styrofoam insulation container according to the present invention. (1) When the underlayer is cured, it firmly adheres to the polystyrene foam. Further, by impregnating the nonwoven fabric, the flexibility is improved and the occurrence of cracks can be prevented. Furthermore, by coating the surface with urethane resin, the heat retention effect is also improved.

(2) The surface can be decorated with free color tone and improved impact resistance and abrasion resistance, which are characteristics of urethane resin. Furthermore, the surface is not easily scratched even during a work process such as washing with water, and the waterproof property is excellent.

(3) The inside is light because it is styrofoam,
Since the surface is a highly flexible urethane coating, it is lightweight and can be loaded to reduce the load during transportation.

[Brief description of drawings]

FIG. 1 is a perspective view of a molded polystyrene foam insulation container.

FIG. 2 is a cross-sectional view showing a state in which an acrylic emulsion is applied.

FIG. 3 is a cross-sectional view showing a state in which a woven fabric is impregnated.

FIG. 4 is a cross-sectional view showing a state where a urethane coating is applied.

FIG. 5 is a cross-sectional view showing a state in which a silicon coating is applied.

[Explanation of symbols]

1 Styrofoam 2 acrylic emulsion 3 cloth woven cloth 4 Urethane layer 5 Silicon layer

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3E062 AA01 AB14 AC08 JA07 JB23                       JC08 JD04 JD08                 3E067 AA04 AA05 AA11 AB01 AC03                       BA05A BB25A BB26A BC06A                       CA18 FA01 FC01 GA11 GD03                       GD10                 4B002 AA21 BA22 CA31                 4F074 AA32 CA31 CA51 CE01 CE16                       CE64 CE98 DA19 DA34

Claims (2)

[Claims] 1. A heat-retaining container for home delivery, which has a high heat-retaining effect, wherein the inner and outer walls of this container are coated with urethane to keep the temperature of food made of expanded polystyrene as a base material. 2. A heat-retaining container for home delivery, characterized in that the holding of the tableware is improved by coating the tableware-holding portion of the coated heat-retaining container with silicone.