JP3238624B2 - Plastic double wall hollow panel for roof or side wall of temporary toilet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a plastic double-walled hollow panels manufactured by blow molding, especially
A double wall hollow panel made of plastic having heat insulation and daylighting properties suitable for use as a roof and side walls of a temporary toilet .

[0002]

2. Description of the Related Art Conventionally, a translucent plastic roof is usually attached to a temporary toilet or the like without a power supply because of the necessity of daylighting. In hot and hot seasons, the room temperature rises, and the darker the color, the less infrared rays pass through,
The roof itself absorbs infrared rays and becomes hot, and the radiant heat raises the indoor temperature, and in any case, gives the user discomfort.

[0003] Further, in the case of FRP, roofs of construction machines, bicycles, motorcycles, boats, etc., have a temperature rise of the roof itself, so that a foam is adhered to the lower surface to reduce radiant heat from the lower surface, or to use ordinary injection molding. In the case of products, dark colors have strong radiation to the bottom surface, and thin colors have more infrared transmission, so they are given an intermediate color such as gray, but still,
Radiation to the bottom surface increases as the temperature of the roof rises due to solar heat, causing discomfort to the people below.

Further, in order to prevent the temperature of the room from rising due to sunlight, an infrared reflecting film or the like mixed with aluminum powder or mica powder is attached to window glass of a building or the like to block infrared rays. However, when trying to pass visible light, it is not possible to block infrared light enough,
In the case of aluminum powder, there is a drawback that transmission of visible light decreases with time due to darkening due to ultraviolet deterioration . Applying such a film to the roof or the like is disadvantageous in terms of cost.

[0005]

By the way, it has been practiced to construct the above-mentioned roof, side walls and the like by hollow panels having a double-wall structure manufactured by blow molding. Hollow panels formed by blow molding are inexpensive, resistant to bending loads, etc., and have good heat insulation properties. The problem of the rise in temperature and lower surface temperature has not been solved. The present invention has been made in view of such a conventional problem, and has been made in consideration of the problems described above .
The object is to obtain a plastic double-walled hollow panel for roof or side wall of ile .

[0006]

SUMMARY OF THE INVENTION A temporary toy according to the present invention.
The plastic double-walled hollow panel for the roof or side wall of plastic is a blow-molded body of plastic, and the plastic is 0.1 to 2% mica powder and 0.05 to 0.5%
Containing titanium oxide powder, preferably further 0. 00
Contains 1-0.05% carbon powder for heat insulation and
It is characterized by having light properties . Instead of or together with the carbon powder, 0.3% or less of a pigment or dye may be contained.

[0007] Mica powder is a known material as a filler for plastics, but has properties of reflecting infrared rays and ultraviolet rays well, being transparent and easily transmitting visible rays, and having excellent heat insulation properties and acting as a plastic reinforcing material. Also have. Further, since the arrangement parallel to the surface when the parison is expanded by blow molding has a flat form, the efficiency of reflecting infrared rays or the like even with a little rather high, also, is cloudy plastic to fogging glass shape. The preferred content is 0.1 to
2%.

[0008] Titanium oxide powder is white and almost reflects infrared rays to visible rays, and when contained in a small amount in addition to mica powder, has the effect of further reducing infrared rays passing through the panel and increasing the heat insulating effect. Further, since it has the effect of making the plastic cloudy and lowering the transparency, by adding an appropriate amount, it is possible to prevent, for example, the shadow of a person from appearing on the side wall of the toilet. The preferred content is 0.05-0.5%. The carbon powder has a function of blocking light of all wavelengths and a function of giving a gray tint to plastic. It is appropriately added according to the desired color tone, and further enhances the effect of reducing infrared rays with a small amount. The preferred content is 0.001 to 0.05%. Pigments or dyes have an action of blocking visible light or infrared rays and an action of giving a desired color to plastic similarly to carbon powder, and are appropriately added instead of or together with carbon powder.

The double-walled plastic hollow panel of the present invention contains a suitable amount of the above-mentioned two to four kinds of additives and a synergistic effect of double surface reflection by the double wall, so that a large amount of visible light is transmitted but infrared rays are transmitted. It blocks out most of the light and has daylighting and excellent heat insulation. Further, since the heat insulating property of the hollow portion of the double wall and the double surface reflection suppress heat intrusion and emission, a heat insulating effect similar to a kind of thermos can be obtained.

[0010] Furthermore, due to the double wall,
Even if the outer wall is heated by sunlight, an air layer is interposed between the inner wall and the inner wall. Therefore, even if the plastic is colored with carbon powder, a pigment, or a dye (the infrared rays are easily absorbed by the coloring, the temperature rises easily). Since the accompanying temperature rise of the outer wall is not directly transmitted to the inner wall, it is difficult for the room temperature to rise due to radiant heat as in the related art. When colored,
Since the infrared rays are absorbed by the outer wall and the infrared rays reaching the inner wall are reduced, the temperature rise of the inner wall itself is also reduced. Further, by forming a hole through which the internal air flows to the outside in the hollow panel, the temperature rise of the air in the hollow portion can be suppressed, and the temperature rise of the inner wall can be further suppressed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the plastic double-walled hollow panel of the present invention has daylighting and excellent heat insulating properties, so that the roof and side walls are formed of the hollow panel in a temporary toilet without a power supply. Thus, it is possible to obtain an indoor room with less sunlight and temperature change due to sunlight. Also,
Since the plastic double-walled hollow panel of the present invention has excellent heat insulating properties, the indoor temperature of the temporary toilet in a hot season can be improved.
The degree of increase can be prevented.

[0012]

(Example 1) In a temporary toilet, a very thin gray double-walled hollow panel containing 1.2% of mica powder, 0.2% of titanium oxide powder and 0.003% of carbon powder in a temporary toilet. Is made by blow molding,
This was compared to a roof consisting of identically shaped double-walled hollow panels without the additive (same blow molded) and a vacuum molded roof of approximately the same weight without the additive. Table 1 below shows the measurement results of the room center temperature, the roof upper surface temperature, and the roof lower surface temperature at an outside air temperature of 25 ° C. after noon on a sunny day in September.

[0013]

[Table 1]

Reference Example 1 A mica powder 0.6 was used as a canopy roof (only roof) for a backhoe of a construction machine.
%, Titanium oxide powder 0.3%, carbon powder 0.015
%, Cyanine blue 0.02% double-walled hollow panel was manufactured by blow molding. This was added without mica, titanium oxide 0.15%, carbon 0.015%, cyanine blue 0.02%. Of the same color, weight, and shape. Table 2 below shows the results of measuring the roof top surface temperature, the hollow center temperature, and the roof bottom surface temperature at an outside air temperature of 28 ° C. on a sunny day in August.

[0015]

[Table 2]

[0016]

According to the present invention, it is possible to obtain a roof and plastic double-walled hollow panel side walls of the temporary toilets with excellent thermal insulation and lighting properties.

──────────────────────────────────────────────────続 き Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 49/00-49/80 E03D 11/00 E04H 1/12

Claims (3)

(57) [Claims] 1. A blow molded article of plastic, wherein the plastic contains 0.1 to 2% (weight%, the same applies hereinafter) of mica powder and 0.05 to 0.5% of titanium oxide powder, and is thermally insulated. Temporary , characterized by having light and lighting properties
Plastic double wall hollow panel for toilet roof or side wall. 2. A blow-molded article of plastic, wherein the plastic is 0.1 to 2% of mica powder, 0.05
~ 0.5% titanium oxide powder, 0.001-0.05%
A plastic double-walled hollow panel for a roof or a side wall of a temporary toilet, characterized by containing carbon powder and having heat insulation and daylighting properties . 3. The temporary toilet according to claim 2, wherein the plastic contains 0.3% or less of a pigment or a dye instead of or together with the carbon powder , and has heat insulation and daylighting properties. Double-wall hollow panel made of plastic for roof or side wall.