JPS6357578B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bathroom ceiling material and a method for manufacturing the same, and more specifically, a hard urethane foam 2 is attached to the upper back side of a ceiling material body 1 made of hard vinyl chloride resin. A plurality of resin layers 3 are spaced apart in a pattern on the lower surface of the ceiling material body 1, and grooves 4 communicating in the longitudinal direction of the ceiling material body 1 are formed between the resin layers 3. The specific invention is a bathroom ceiling material that is characterized by extrusion molding of the ceiling material body 1 with hard vinyl chloride resin, and then the molding material of the rigid urethane foam 2 is injected into the upper back surface of the ceiling material body 1 and foamed and hardened. The combined invention is a method of manufacturing a bathroom ceiling material, which is characterized in that the lower surface of the ceiling material body 1 is coated with an ultraviolet curable resin in a pattern, and the resin-coated surface is irradiated with ultraviolet rays.

Traditionally, mortar, wooden ceiling materials, synthetic resin ceiling materials, etc. have been used to construct bathroom ceilings, but mortar is a wet method, so it takes a long time to construct, is prone to condensation, and has an uneven surface. The drawback was that it was easily contaminated by dust. In addition, wooden ceiling materials absorb moisture and are easily contaminated by mold growing on the surface, while synthetic resin ceiling materials attract dust due to static electricity and are easily contaminated.
Moreover, the condensed water that forms on the ceiling falls directly onto the bathers, which tends to cause discomfort.

The present invention has been made in view of the above points, and the purpose of the specific invention is to prevent contamination of the bathroom ceiling due to dust adhesion, mold growth, corrosion, etc., and to prevent condensation water from forming on the bathroom ceiling. The object of the combined invention is to provide a method for manufacturing a bathroom ceiling material that can easily produce a bathroom ceiling material that has the above-mentioned advantages. be.

The specific invention of the present invention will be explained in detail below with reference to the illustrated embodiments. The ceiling material body 1 has a substantially U-shaped cross section with an open top and back side, and is formed by extrusion molding of hard vinyl chloride resin, and the side portions of the adjacent ceiling material body 1 are located on both sides of the ceiling material body 1. A joint portion 5 is provided for joining with. The open upper back side of the ceiling material body 1 is filled with a hard urethane foam 2, and the lower surface of the ceiling material body 1 is filled with a thick layer made of ultraviolet curing epoxy resin, acrylic resin, or unsaturated polyester resin. A plurality of resin layers 3 of about 100 to 500 microns are spaced apart in a pattern over almost the entire surface, and the resin layers 3 are connected to each other over the entire length of the lower surface of the ceiling material body 1 in the longitudinal direction. It becomes a concave groove part 4 of the strip. The resin layer 3 provided on the lower surface of the ceiling material body 1 may be arranged, for example, in a striped pattern parallel to the longitudinal direction of the ceiling material body 1 as shown in FIGS. 1 and 2, or in a substantially circular pattern as shown in FIG. A plurality of concave grooves 4 are formed between the resin layers 3 in a stucco-like manner in which the resin layers 3 are spaced apart and communicated in the longitudinal direction of the ceiling material body 1. The ceiling material A having the above-mentioned configuration is constructed so that the recessed groove portion 4 on the lower side slopes downward as shown in FIG.
In order for the condensed water to smoothly flow down to the wall surface 7 side through the groove 4, it is desirable to construct the ceiling material A so that the inclination angle α is 10 degrees or more. As mentioned above, since the ceiling material body 1 is made of hard vinyl chloride resin with excellent water resistance, the ceiling material A is prevented from corrosion and mold, and the upper back surface of the ceiling material body 1 is made of hard urethane foam 2. Since it is filled, the strength of the ceiling material A is improved and dents and bending are prevented, and the hard urethane foam 2 further improves its heat insulation properties, making it difficult for dew condensation to occur. In addition, since the lower surface of the ceiling material body 1 is recessed with a groove 4 that communicates with the longitudinal direction, even if condensation occurs on the ceiling material A, the condensed water will collect in the groove 4 and slope downward. The condensed water flows down from the groove part 4 along the wall surface 7 to the floor surface, and is prevented from directly falling from the ceiling onto the floor surface.

In general, hard vinyl chloride resin molded products tend to attract dust and become contaminated due to static electricity, but as mentioned above, the lower surface of the ceiling material body 1 made of hard vinyl chloride resin is made of epoxy resin, acrylic resin, unsaturated polyester, etc. Since the resin layer 3, such as a resin, is provided in a pattern, the surface hardness of the ceiling material A is improved by the resin layer 3, making it less likely to be scratched and attracting dust, thereby preventing contamination. 8 in FIG. 4 is a bathtub.

Next, the manufacturing method of bathroom ceiling material will be explained. First, a hard vinyl chloride resin is extruded using an extrusion molding machine to form a ceiling material body 1 having a substantially U-shaped cross section with an open top and back side, and then the ceiling material body 1 as shown in FIG.
The lower surface side of the mold is placed on the lower mold conveyor 9 and moved to the urethane injection machine 10 side. Urethane injection machine 10
isocyanate B, polyether and blowing agent,
Mixture C of catalyst and foam stabilizer is separately supplied, and isocyanate B and mixture C are mixed and stirred at a predetermined ratio to prepare a molding material for rigid urethane foam 2, and this molding material is passed through a urethane injection machine. 10 After injecting from the injection head at the lower end to the open upper back side of the ceiling material body 1 that is being moved by the lower die conveyor 9, the upper back surface of the ceiling material body 1 is immediately held down by the upper die conveyor 11 and moved by the lower die conveyor. After a certain period of time, usually about 30 seconds to 2 minutes, the ceiling material main body 1, whose upper back side is filled with hard urethane foam 2, is transported to the ends of the lower mold conveyor 9 and the upper mold conveyor 11. Take it out from between. After filling the upper back side of the ceiling material body 1 with the hard urethane foam 2, an ultraviolet curing resin is applied to the lower surface of the ceiling material body 1 by silk screen printing, rotary screen printing, concave plate roll, etc.
It is applied with a convex plate roll (made of metal or rubber) in a pattern such as the striped pattern shown in Fig. 2 or the stylized pattern shown in Fig. 3, and then the ceiling material body 1 is placed in an ultraviolet curing oven equipped with a high-pressure mercury lamp irradiation device. By passing ultraviolet rays through the resin coating surface to harden the resin, the upper back side of the ceiling material body 1 is filled with hard urethane foam 2, and a plurality of resin layers spaced apart on the lower surface of the ceiling material body 1 are formed. A ceiling material A is obtained in which a plurality of recessed grooves 4 are formed in which grooves 4 are communicated in the longitudinal direction. The UV-curable resin used above is preferably a resin having a radically polymerizable unsaturated bond in its molecule, such as an unsaturated polyester resin, an acrylic resin or an epoxy resin with a radically polymerizable group introduced into its molecule, The above resin is used by blending a vinyl monomer and a photosensitizer.

In the specific invention of the present invention, as described above, the upper back side of the ceiling material body formed of hard vinyl chloride resin is filled with a rigid urethane foam, and the lower surface of the ceiling material body is coated with a plurality of resin layers in a pattern. Since the recessed grooves that communicate in the longitudinal direction of the ceiling material body are formed between the resin layers, if the bathroom ceiling is constructed using the bathroom ceiling material of the present invention, the bathroom ceiling will not be affected by dust, mold, corrosion, etc. In addition to preventing contamination of the bathroom ceiling, the condensed water generated on the bathroom ceiling can flow down the wall surface, and the combined invention can easily produce a bathroom ceiling material having the above-mentioned advantages.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of one embodiment of the specific invention of the present invention, Fig. 2 is a front view of the same as above, Fig. 3 is a front view of another embodiment, Fig. 4 is an explanatory diagram during construction, and Fig. 5 The figure is a schematic process diagram of the combined invention, where 1 is the ceiling material body, 2
3 is a hard urethane foam, 3 is a resin layer, and 4 is a groove.

Claims (1)

[Claims] 1. Filling the upper back side of a ceiling material body made of hard vinyl chloride resin with a hard urethane foam, and spacing a plurality of resin layers in a pattern on the lower surface of the ceiling material body,
A bathroom ceiling material characterized by forming a concave groove portion communicating in the longitudinal direction of a ceiling material body between spaced apart resin layers. 2. Extrusion mold the ceiling material body with hard vinyl chloride resin, then inject hard urethane foam molding material onto the top and back surface of the ceiling material body and allow it to foam and harden. A method for manufacturing bathroom ceiling materials that involves applying resin in a pattern and irradiating the resin-coated surface with ultraviolet light.