JPS631913Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a stainless steel bathtub, and its purpose is to provide a stainless steel bathtub that has excellent heat retention and hardly causes distortion or deformation even under high temperature and high humidity conditions. .

Generally, stainless steel bathtubs are made by surrounding the outer circumferential surface of the bathtub body with a heat insulating layer such as closed-cell rigid polyurethane foam for the purpose of heat retention, and adhesively fixing the apron to the bathtub body through this closed-cell rigid polyurethane foam layer. ing. However, although such closed-cell rigid polyurethane foam is used as a heat insulating layer and has a good heat insulation effect and excellent heat retention, when used in hot and humid bathrooms, etc., the gas in the closed cells expands. The entire foam layer expands and deforms, and even the bathtub body and apron may become distorted or deformed.

Therefore, in order to overcome these drawbacks, it has been proposed to use open-cell rigid polyurethane foam as a heat insulating layer instead of closed-cell rigid polyurethane foam. Because the air bubbles are connected, the entire foam does not expand or deform, and the bathtub body or apron will not be distorted or deformed. It has the disadvantage that it easily penetrates deep into the foam layer, resulting in a significant reduction in the heat insulating effect.

In view of the current situation, the present invention was devised in order to provide a stainless steel bathtub that has good thermal insulation properties, excellent heat retention, and hardly distorts or deforms even under high temperature and high humidity conditions.The following is an example of the present invention. The explanation will be based on drawings showing.

In the figure, 1 is the stainless steel bathtub body.
A closed-cell rigid polyurethane foam layer 2 and an open-cell rigid polyurethane foam layer 3 are sequentially laminated on the outer surface of the stainless steel bathtub body 1, and an apron 4 is adhesively fixed to the open-cell rigid polyurethane foam layer 3. has been done.

In this way, in the stainless steel bathtub of the present invention, the apron 4 is adhesively fixed to the stainless steel bathtub body 1 through the closed cell hard polyurethane foam layer 2 and the open cell hard polyurethane foam layer 3, so that it can be used in bathrooms, etc. Even if the gas in the closed cells of the closed-cell rigid polyurethane foam layer 2 expands due to use under high temperature and high humidity conditions, the closed-cell rigid polyurethane foam layer is protected by the adjacent open-cell rigid polyurethane foam layer 3. 2 is absorbed and relaxed, and the bathtub body 1 and apron 4 are not distorted or deformed. In addition, even if water used in a bathroom etc. infiltrates the open-cell rigid polyurethane foam layer 3, the insulation effect is maintained well by the closed-cell rigid polyurethane foam layer 2, so the heat retention will not deteriorate. Therefore, it is possible to obtain a stainless steel bathtub that has excellent heat retention properties and is hardly distorted or deformed even under high temperature and high humidity conditions.

The closed-cell rigid polyurethane foam layer 2 is formed by spraying a stock solution for closed-cell rigid polyurethane foam onto the outer surface of the stainless steel bathtub body 1 and foaming and hardening. The polyurethane foam layer 3 is formed by a method such as injecting a stock solution for open-cell rigid polyurethane foam into the gap between the bathtub body 1 and the apron 4 on which the closed-cell rigid polyurethane foam layer 2 is adhered and foaming on site. It is formed. The apron 4 is adhesively fixed to the bathtub body 1 via these open-cell and closed-cell hard polyurethane foam layers 3 and 2. In addition, the open-cell rigid polyurethane foam layer 3 is formed by spraying a stock solution for open-cell rigid polyurethane foam onto the closed-cell rigid polyurethane foam layer 2 and foaming and curing it, and then the apron 4 is fixed by adhesive. Alternatively, the open-cell rigid polyurethane foam layer 3 and the closed-cell rigid polyurethane foam layer 2 may be laminated on the apron 4 in advance and then adhesively fixed to the outer surface of the bathtub body 1.

Further, the closed-cell rigid polyurethane foam layer 2 and the open-cell rigid polyurethane foam layer 3 may be formed not only on the outer surface of the bathtub body 1 but also on the entire outer peripheral surface including the bottom surface as shown in FIG. When formed on the entire outer peripheral surface in this way, the heat insulation effect of the bathtub is further improved.

As explained above, in the case of the stainless steel bathtub of the present invention, since the bubbles are closed cells, the gas in the closed cells tends to expand and deform under high temperatures. Since the polyurethane foam layer and the air bubbles are in communication with each other, water infiltrates through the air bubbles, reducing the insulation effect, but the open-cell rigid polyurethane foam does not expand or deform as the gas in the air bubbles does not expand under high temperatures. The layers are sequentially laminated on the outer circumferential surface of the stainless steel bathtub body, and the apron is integrally adhesively fixed to the bathtub body through these closed-cell and open-cell hard polyurethane foam layers. The disadvantages of the above-mentioned hard polyurethane foam layers are compensated for and the advantages thereof are enhanced, so that the bathtub has a good thermal insulation effect, and the bathtub body and apron do not suffer from distortion or deformation even under high temperature and high humidity conditions.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the stainless steel bathtub of the present invention, and FIG. 2 is a sectional view showing another embodiment. 1... Stainless steel bathtub body, 2... Closed cell hard polyurethane foam layer, 3... Open cell hard polyurethane foam layer, 4... Apron.

Claims (1)

[Scope of utility model registration request] A closed-cell rigid polyurethane foam layer is formed on all or part of the outer circumferential surface of the stainless steel bathtub body, and an open-cell rigid polyurethane foam layer is further formed on this closed-cell rigid polyurethane foam layer. A stainless steel bathtub characterized in that an apron is integrally adhesively fixed to a bathtub body via a cellular rigid polyurethane foam layer and an open-cell rigid polyurethane foam layer.