JP2000301059A - Bathtub with pattern - Google Patents

Abstract

(57) [Summary] [Problem] FR for molding general-purpose SMC material at high temperature and high pressure
In a P bathtub, a design is imparted to the bathtub to improve the design. SOLUTION: In a FRP bathtub made of SMC,
By applying a pattern using a paint, and using a colored primer paint for the base coat layer 2, the performance as a bathtub such as adhesion is satisfied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a patterned bathtub.

[0002]

2. Description of the Related Art There have been various methods for imparting a pattern to a conventional bathtub. For example, in a bathtub by a casting method, a pattern material is mixed with a material to be cast, and the material is poured into the mold to obtain a shade-like bathtub. In the bath tub by the hand lay-up method, the gel coat to be applied to the mold is applied using a multicolor apparatus to apply a gel coat with a pattern, and then the FRP is formed by the hand lay-up method or the spray-up method, and the mold is removed from the mold. By molding, a patterned bathtub is obtained.

[0003]

However, in a bath made of FRP in which a general-purpose SMC material is molded at a high temperature and a high pressure using a mold, since the material flows in the mold and is cured, a single color is formed. There was only a bathtub. However,
In terms of design, it has been a problem to provide a technical solution that satisfies the performance as a bathtub by imparting a pattern to the bathtub by some method, because the appearance is not good in a single color.

[0004]

Means for Solving the Problems A structure in which a coating film of a base coat layer, which is a colored primer coating, and a pattern layer is formed from the surface of an FRP substrate made of SMC, and a coating film of a clear layer is formed thereon. I do.

[0005] According to the above invention, a pattern can be imparted to a bathtub made of a general-purpose SMC material using a metal mold and a high-temperature, high-pressure FRP bath to obtain various bathtub performances. Can be.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION
A coating film of a base coat layer, which is a colored primer coating, and a pattern layer is formed on the surface of an FRP substrate made of SMC, and a coating film of a clear layer is formed thereon. Using a mold of a general-purpose SMC material and a mold, it is possible to impart a pattern to a bathtub made of FRP molded at a high temperature and a high pressure, and by using a primer paint, the adhesion between the FRP and the base coat layer is improved, Since the adhesion between the base coat layer, the pattern layer and the clear layer is improved, it is possible to obtain a bathtub that satisfies various performances.

[0007] The invention according to claim 2 of the present invention is to form a coating film of a base coat layer which is a colored primer coating from the surface of an FRP substrate made of SMC, and to form a coating film of a pattern layer and a clear layer thereon. Is formed to give a pattern. By using the primer paint, the adhesion of each coating film layer can be improved, the area of the primer paint seen from the surface side can be reduced, and the design such as gloss can be improved.

The invention according to claim 3 of the present invention is that the primer paint has a lower molecular weight than the paint to be applied thereon. And by giving elasticity,
The expansion and contraction due to the temperature change can be absorbed, and the adhesion between the paint and the FRP bath made of SMC can be improved.

According to a fourth aspect of the present invention, in the primer coating composition, 5 parts of an inorganic pigment component is added to 100 parts of the resin.
~ 100 parts were added. Then, the resin and the inorganic pigment component penetrate into the fine porous on the FRP surface,
Since the adhesion between RP and the base coat layer is improved and the surface of the primer coating is roughened, the adhesion with the coating applied on the upper layer is further improved, and it is possible to obtain one that satisfies various performances as a bathtub. it can.

[0010] In the invention according to claim 5 of the present invention, the primer paint and the paint applied to the upper layer are made of the same type of resin material. And since it is a resin of the same system, familiarity at the paint interface between each coating film is good, and the adhesiveness can be further improved.

The invention according to claim 6 of the present invention is to apply an acrylic urethane-based paint. And
By applying acrylic urethane-based paint to the pattern, the adhesion between the paint and the FRP bath made of SMC can be ensured, and it can be prevented from peeling or swelling with hot water and preventing the adhesion of dirt etc. In addition, the stain resistance can be further improved.

The invention according to claim 7 of the present invention is a patterned bathtub in which resin beads having a particle diameter of 1 to 50 μm are added to a clear layer coating material. Since the resin beads are included in the clear layer, fine protrusions are formed by the resin beads on the surface, so that the wear resistance of the clear layer is improved and the skin of a person is less likely to slip.

[0013]

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS.

FIG. 1 is a partial sectional view of a patterned bathtub according to the present invention. The substrate 1 is a layer obtained by press-molding an SMC material comprising an unsaturated polyester resin, glass fiber, and an inorganic filler by a known method. First, the surface of the bathtub is about # 1000 of sandpaper, and is polished to remove dirt or fine irregularities on the surface and to improve adhesion. Then, 4 paints A made of an acrylic urethane paint which is a single color primer paint are applied thereto. 4 Paint A is colored gray by toner,
Add inorganic additives such as titanium oxide and calcium carbonate to resin 1.
50 parts by weight to 50 parts by weight of an acrylic polyol as a main component, a clearing agent of a transparent hexamethylene diisocyanate as a main component, and an appropriate amount of a thinner. One part of the curing agent is used for eight parts of the main agent. The paint viscosity is adjusted to about 15 seconds. The coating is performed by increasing the normal atomization pressure to make the coating material fine particles, and then coating the surface of the bathtub by about 20 microns to form the base coat layer 2.

Next, the setting (leaving) time is set to about 10
By using 5 paints B (dark gray, viscosity 10 seconds) and 6 paints C (white, viscosity 10 seconds) of different colors from paint A, the atomization pressure was lowered with a two-head gun, The pattern layer 3 is coated so as to be large particles. The coating of the pattern layer 3 is adjusted so that the size of the coated particles is about 10 mm or less. Further, as shown in the schematic diagram of the pattern on the surface of the bathtub in FIG. 2, the surface is sparsely painted, and the color of 4 paint A of the base coat layer and the colors of 5 paint B and 6 paint C which are pattern-painted are both visible. Paint. The material components of the paint B and the paint C are almost the same as those of the paint A in order to improve adaptability and adhesion at the paint interface. Then, after a setting time of about 10 minutes is further provided, the coated bath is left in a drying oven at 80 ° C. for 60 minutes to evaporate the thinner and harden the acrylic urethane-based paint.

Next, the bath is taken out of the curing furnace, cooled at room temperature, and then coated with a transparent acrylic urethane paint to form a clear layer 7 of about 20 μm. 8 Paint D
Is composed of a main component mainly composed of acrylic polyol having a higher molecular weight than that of paints A to C, a curing agent mainly composed of transparent hexamethylene diisocyanate used in paints A to C, and an appropriate amount of thinner. The mixing ratio is 1 part of the curing agent to 4 parts of the main agent. The paint viscosity is adjusted to about 15 seconds. Then, after a setting time of about 10 minutes is provided, the acrylic urethane-based paint is cured by leaving the painted bathtub in a drying oven at 80 ° C. for 60 minutes. Thereafter, the desired patterned bathtub is obtained by cooling.

The bathtub thus obtained is a patterned bathtub having a pattern in which irregularities of about 60 μm are formed on the coating surface. In this way, a pattern can be imparted to the bathtub made of FRP, which is formed by molding a general-purpose SMC material at a high temperature and a high pressure using a mold, and the performance of the bathtub such as hot water resistance and chemical resistance can be satisfied. You can get what you want.

That is, in the above-described structure, by adding an inorganic additive to the base coat layer, the primer coating material enters fine pores on the surface of the FRP bath, and suppresses air accumulation and the like, thereby improving coating film adhesion. Can be improved. In addition, the base coat layer and the pattern layer easily pass water through the inorganic additive, thereby suppressing swelling between coating films or between coating film substrates. Further, since fine irregularities are formed on the surface by the inorganic additive, the contact area with the clear layer is increased as in the case of polishing the surface, and the adhesion is improved.

In addition, since the primer paint has a lower molecular weight of the acrylic polyol as a main component than the clear layer paint, the paint film has good elongation and has an effect as a buffer material.
The expansion and contraction of the FRP and the expansion and contraction of the coating film due to a temperature change or the like can be sufficiently absorbed, and the adhesion is improved.

Here, the paints of the base layer and the pattern layer and the clear layer of the primer paint have different molecular weights and curing agents, but are the same acrylic urethane paints, so that the resins are easily compatible with each other and the adhesion between the layers is good. Can be secured.

Example 2 As in Example 1, the substrate 1
This is a layer obtained by press-molding an SMC material comprising an unsaturated polyester resin, glass fiber, and an inorganic filler by a known method. The bathtub was molded without using wax or a silicone release agent, and was degreased with a solvent before painting. There, Example 1
In the same manner as described above, a paint A composed of an acrylic urethane-based paint, which is a single-color primer paint, is applied to form a base coat layer 2 (FIG. 3).

Next, a setting time of about 5 minutes is provided, and paints B and C having different colors from paint A are used.
Using a head gun, the patterning layer 3 is coated so that the atomization pressure is reduced and the particles become large particles. The paint B and the paint C have a larger molecular weight of the main agent than the paint A, and unlike the example 1, do not use the primer paint. The pattern coating was adjusted so that the size of the particles in the coated state was about 5 mm or less, and the coating was performed in the same manner as in Example 1. Therefore, after a setting time of about 5 minutes is further provided, the painted bath is left in a drying oven at 80 ° C. for 60 minutes to evaporate the thinner and harden the acrylic urethane paint.

Next, the bath was taken out of the curing furnace, cooled at room temperature for about 60 minutes, and then painted with a transparent acrylic urethane-based paint at a normal atomization pressure and raised to about 20 μm.
A clear layer 7 is formed. Then, after a setting time of about 10 minutes is provided, the acrylic urethane-based paint is cured by leaving the painted bathtub in a drying oven at 80 ° C. for 60 minutes. Thereafter, the desired patterned bathtub is obtained by cooling.

The unevenness caused by the pattern coating on the surface of the coating occurs because the atomizing pressure is lowered and the pattern is coated so as to become large particles. The unevenness of the coating surface is determined by the atomization pressure, the viscosity of the paint, the temperature, the setting time, and the like.
Was found to be appropriate. That is, it has a flat part and a standing part called a bathtub, and in the coating of a concave shape,
Unevenness suitable for mass production is provided because paint dripping and paint running can be reduced.

The bath tub thus obtained can be provided with a pattern by coating by providing irregularities of an appropriate height on the coating surface, and spraying the paint by coating the concave shape of the bath tub. It is possible to eliminate the influence of roughness due to burrs. In addition, by providing a pattern with irregularities on the bathtub, there is an advantage that scratches and dirt are less noticeable.

The bathtub obtained in this manner is subjected to pattern painting using a paint as shown in FIG.
This is a patterned bathtub provided with a pattern having irregularities of 0 μm. By doing so, a pattern can be imparted to a bathtub made of FRP molded at high temperature and pressure using a general-purpose SMC material in a mold, and a material that satisfies various performances as a bathtub can be obtained.

Since the base coat layer is a primer in the same manner as in Example 1, the same effect can be obtained, and the area in which the primer coating material containing a large amount of the inorganic additive and having a low gloss cannot be seen becomes small, so that the base coat layer is exposed on the surface. Since there is no leverage, design properties such as gloss can be improved.

Further, as shown in FIG. 4, when the surface is worn for a long time, the base coat layer does not come out of the surface when the surface is worn. .

(Embodiment 3) FIG. 5 is a partial sectional view of a patterned bathtub according to the present invention. This embodiment is different from the first embodiment in that resin beads 9 having a thickness of 1 to 50 μm are added to the clear layer coating material. The resin beads 9 have a hardness higher than that of the paint by cross-linking the molecules, and have improved hot water resistance, and are distributed in the clear layer and on the surface as shown in FIG. As a result, fine projections are formed on the surface, and a surface that is not slippery during use is formed. Further, by using an acrylic resin or the like having a hardness higher than the coating film hardness for the resin beads 9, the abrasion resistance can be further improved.

[0030]

As is apparent from the above description, according to the first aspect of the present invention, a coating film of a base coat layer and a pattern layer, which are primer coatings colored from the surface of an FRP substrate made of SMC, And a coating film of a clear layer is formed thereon, and a general-purpose SMC material can be provided with a mold in a bath and made of FRP molded at high temperature and pressure using a mold, and a primer can be provided. The use of paint improves the adhesion between FRP and the base coat layer,
Since the adhesion between the base coat layer, the pattern layer and the clear layer is improved, it is possible to obtain a bathtub that satisfies various performances.

According to the second aspect of the present invention, S
A paint film of a base coat layer which is a colored primer paint is formed from the surface of an FRP base material composed of MC, and a paint film of a pattern layer and a clear layer is formed thereon to give a pattern. By using, the adhesion of each coating layer can be improved, the area of the primer coating which can be seen from the surface side can be reduced, and the design properties such as gloss can be improved.

According to the invention of claim 3 of the present invention, the primer paint has a lower molecular weight than the paint applied on the upper layer, and by having stretchability, absorption of stretch due to temperature change can be reduced. This makes it possible to improve the adhesiveness between the paint and the FRP bath made of SMC.

According to the invention of claim 4 of the present invention, in the primer coating material, 5 to 100 parts of an inorganic pigment component is added to 100 parts of the resin, or the resin and the inorganic material are added to the fine porous surface of the FRP surface. Pigment component penetrates, F
Since the adhesion between RP and the base coat layer is improved and the surface of the primer coating is roughened, the adhesion with the coating applied on the upper layer is further improved, and it is possible to obtain one that satisfies various performances as a bathtub. it can.

According to the invention of claim 5 of the present invention, the primer paint and the paint applied to the upper layer are made of the same type of resin material and are made of the same type of resin. Good compatibility at the paint interface between the coating films can be achieved, and the adhesion can be further improved.

According to the invention of claim 6 of the present invention, the coating is performed using an acrylic urethane-based paint.
The adhesiveness between the FRP bathtub made of C and the paint can be ensured, and it can be prevented from peeling or swelling with hot water or the like, and can prevent the adhesion of dirt and the like and further improve the stain resistance. .

According to the invention according to claim 7 of the present invention, there is provided a patterned bath in which resin beads having a particle diameter of 1 to 50 μm are added to the clear layer paint, and the clear layer contains resin beads. Since fine projections made of resin beads are formed on the surface, the wear resistance of the clear layer is improved, and the effect of preventing human skin from slipping is obtained.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a bathtub in a patterned bathtub according to a first embodiment of the present invention.

FIG. 2 is a schematic view of the surface of the bathtub.

FIG. 3 is a partial sectional view of a bathtub in a patterned bathtub according to a second embodiment of the present invention.

FIG. 4 is another partial sectional view of the bathtub.

FIG. 5 is a partial sectional view of a bathtub in a patterned bathtub according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base material 2 Base coat layer 3 Pattern layer 4 Paint A 5 Paint B 6 Paint C 7 Clear layer 8 Paint D 9 Resin beads

Continuation of the front page F term (reference) 2D032 AA00 AB03 4D075 CB36 DA06 DB48 DC01 EA41 EA43 EB22 EB52 EC01 EC24 EC53

Claims (7)

[Claims] 1. A sheet mold compound (hereinafter referred to as SM)
C) (hereinafter referred to as FR)
A patterned bathtub in which a coating of a base coat layer, which is a colored primer coating, and a pattern layer is formed from the surface of a substrate, and a clear layer coating is formed thereon. 2. A patterned bath having a coating film of a base coat layer, which is a colored primer coating, formed on the surface of an FRP substrate composed of SMC, and a coating film of a pattern layer and a clear layer formed thereon. 3. The bathtub with a pattern according to claim 1, wherein the primer paint has a lower molecular weight than a paint applied on an upper layer thereof. 4. The bathtub with a pattern according to claim 1, wherein the primer coating comprises 5 to 100 parts of an inorganic additive added to 100 parts of the resin. 5. The patterned bathtub according to claim 1, wherein the primer coating and the coating applied to the upper layer are made of the same type of resin material. 6. The patterned bathtub according to claim 5, wherein the paint is an acrylic urethane paint. 7. The bathtub with a pattern according to claim 1, wherein resin beads having a particle size of 1 to 50 μm are added to the clear layer coating material.