JPS6114426Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a marble laminated molded product. Conventionally, marble-like resin molded products have been known in which crushed stone or inorganic fillers are dispersed in unsaturated polyester resin or hardened acrylic resin, but these products lack the heavy feel and stone texture characteristic of marble. Marble-like molded products are also known, in which marble-patterned printed decorative paper is laminated on the surface of glass fiber reinforced plastic.
It lacks stone texture and lacks depth. Furthermore, since the surface of these conventional resin molded products is resinous,
It does not feel cold to the touch, feels different from marble, and is easily scratched on the surface. On the other hand, as mentioned above, marble has a unique stone texture with a sense of weight and depth, but it has drawbacks such as being easily broken, easily attracting dirt, and having poor chemical resistance. This invention was made in view of the above, and
The stone texture unique to marble, that is, the color tone is deep,
It has a high surface hardness, feels cool to the touch, and eliminates the drawbacks of conventional marble-like molded products and marble, giving it a heavy feel, strong strength, and resistance to cracking and staining. The purpose of the present invention is to provide a marble-like laminated molded product. The marble-like laminate molded product of the present invention contains an intermediate resin layer having a coloring agent and/or a colored pattern layer on a fiber-reinforced magnesia cement hardened body, and glass microbeads in an amount of 1 to 4 times the weight of the resin. It is characterized by being laminated with a transparent or translucent surface resin layer. FIG. 1 shows an embodiment of the marble-like laminate molded product of the present invention. Curable resins such as saturated polyester resins and curable acrylic resins are used.
The finer the glass microbeads used, the better.
Generally, those having a particle size of several microns are preferably used. If the particle size is larger than 100μ, the surface of the resulting laminate molded product will be inferior in smoothness and hardness, which is not preferable. Further, the amount of glass microbeads in the surface resin layer is 1 to 4 times the weight of the resin. If it is less than 1 times the weight, the molded product will not have sufficient surface hardness. The surface resin layer is formed by applying a liquid resin composition containing glass microbeads to the surface of the mold 3 coated with a mold release agent and curing it. The liquid resin composition contained therein has poor fluidity, making it difficult to apply to a mold, which is not preferred. The thickness of the surface resin layer is usually 0.1 mm or more, preferably 0.3 to 2 mm. Thickness is 0.1mm
If it is smaller, it is difficult to form a uniform resin layer and the surface hardness is insufficient. On the other hand, if it is larger than 2mm,
Cracks are likely to occur in the surface resin layer. The intermediate resin layer 4 has a coloring agent and/or a colored pattern layer, and forms a marble pattern that can be seen through the surface resin layer. FIG. 1 shows an embodiment in which the intermediate resin layer contains a colorant 5. FIG. Coloring agents help give marble its unique texture, weight, and even shine.Specifically, it is used in powdered natural stones such as marble and kansui stone, and powdered powders such as calcium carbonate, glass, mica, and silica. is used. The particle size of the colorant powder is suitably from several microns to several thousand microns. FIG. 2 shows another embodiment of the intermediate resin layer 4, which has a colored marbleized layer 6. FIG. This marble pattern layer is printed on a glass fiber sheet, for example, and is formed by laminating the resin-impregnated glass fiber sheet on the surface resin layer 1 and curing it. Further, the marble pattern layer can also be formed by transfer painting onto the resin layer. For example, when the surface resin layer is in an uncured or semi-cured state with liquid or adhesive properties, a transfer sheet is placed on the resin layer, defoamed and brought into close contact with the mold, and then the resin layer is cured. . Thereafter, if the transfer sheet is peeled off, the pattern will be transferred to the surface resin layer, and if a resin layer is laminated on top of this pattern, an intermediate resin layer will be formed. In this case, the intermediate resin layer is understood to have a pattern layer on its surface (on the back surface of the intermediate resin layer when viewed from the illustrated mold). Alternatively, another resin layer may be laminated on the surface resin layer, and the pattern may be transferred as described above when this resin layer is in an uncured or semi-cured state. In this case, the intermediate resin layer is understood to have a pattern layer on the back surface (the surface of the intermediate resin layer when viewed from the illustrated mold).
Of course, the intermediate resin layer may contain a coloring agent and may also have a pattern layer, or may be formed into multiple layers, which will further increase the depth of the marble pattern and provide the texture and shine unique to marble. It becomes like this. Similarly to the surface resin layer, the intermediate resin layer also typically uses a curable resin such as an unsaturated polyester resin or a curable acrylic resin. The thickness of the intermediate resin layer, if it contains a colorant, depends on the particle size of the colorant, but
Generally, 0.3 to 4 mm is appropriate, and when the pattern-printed glass fiber sheet has a pattern layer by transfer painting, 0.3 to 1 mm is appropriate, but it is not limited to these ranges. In the laminate molded product of the present invention, the hardened magnesia cement layer 7 is reinforced with fibers and laminated on the intermediate resin layer 4. As reinforcing fibers, inorganic fibers such as glass fibers and asbestos, and organic fibers such as polyester fibers and polyamide fibers are used in appropriate forms such as long fibers, short fibers, mats, cloths, and the like. Preferably, glass fiber mat is impregnated with a curable magnesia cement composition, laminated in multiple layers, and cured to form a fiber-reinforced magnesia cement hardened body layer. As is conventionally known, the magnesia cement composition is composed of 100 parts by weight of active magnesia and 20 to 60 parts by weight of magnesium chloride or 15 to 100 parts by weight of magnesium sulfate in terms of anhydride. This is mixed with 40 to 150 parts by weight of water and used as a water paste. as needed,
Fillers, aggregates, hardening modifiers, etc. are blended. The thickness of the fiber-reinforced magnesia cement hardened layer is selected to have the required strength depending on the intended use of the molded product, and is usually about 5 to 15 mm, but is of course not limited to this range. do not have.
In addition, the heat curing temperature of the magnesia cement composition depends on the activity and composition of activated magnesia, but
Usually in the range of 70-120°C. After curing, demolding and curing, the marble-like laminate molded product of the present invention can be obtained. In the molded product of the present invention, the colorant and/or colored marble pattern that gives marble-like texture, weight, and shine in the intermediate resin layer can be seen through the surface resin layer, so the molded product has an extremely marble-like appearance. It has a stone texture, and since the surface resin layer contains a large amount of glass microbeads, its thermal conductivity is close to that of inorganic materials, giving the molded product a cool, marble-like feel when you touch it. In addition, although it is not as heavy as marble, it has a moderate weight based on the hardened magnesia cement, and there is no discomfort in texture or feel. In addition, since the surface resin layer contains glass microbeads, it has excellent surface hardness and impact strength.
Hard to scratch and hard to break. It also doesn't get dirty easily. Moreover, since the cured magnesia cement, which originally has poor water resistance, is covered with resin, it has excellent water resistance and is reinforced with fibers, resulting in significantly improved mechanical strength, especially bending strength. The laminated molded product of the present invention has various advantages such as being hard to break, having excellent chemical resistance, and being hard to stain, while maintaining the desirable properties unique to marble. Examples of the present invention will be described below. Note that parts are parts by weight. Example After applying a mold release agent to the mold, unsaturated polyester resin
100 parts, 300 glass microbeads with an average particle size of 30μ
A transparent liquid resin composition consisting of 1.5 parts of methyl ethyl ketone peroxide and 1.0 parts of cobalt naphthenate was brush-coated to a thickness of 0.5 mm and cured by heating at 40° C. for 20 minutes to form a surface resin layer. On top of this, 100 parts of unsaturated polyester resin,
A liquid resin composition consisting of 60 parts of crushed marble as a coloring agent, 10 parts of silica, 0.45 parts of methyl ethyl ketone peroxide, and 0.3 parts of cobalt naphthenate was applied to a thickness of 0.6 mm and cured by heating at a temperature of 40°C for 20 minutes. I let it happen. Separately, 230 g/m ² of chopped glass fiber strand mat was lined with a liquid resin composition consisting of 100 parts of unsaturated polyester resin, 10 parts of titanium oxide-containing white pigment, 1.5 parts of methyl ethyl ketone peroxide, and 1.0 part of cobalt naphthenate. and laminated this on the colorant-containing resin layer,
Together, they formed an intermediate resin layer. Next, 230 g/m ² of glass fiber chopped strand mat was placed on this resin layer, and 100 parts of activated magnesia oxide, 63 parts of magnesium chloride,
A magnesia cement composition consisting of 5 parts of tertiary magnesium phosphate and 33 parts of water was applied with a brush, followed by defoaming and impregnation. Lamination of glass fiber chopped strand mat and magnesia cement composition was repeated on top of this in the same manner, resulting in 10 layers. This laminate was heated in a heating furnace at 70°C for 30 minutes,

[Table] After demolding, a laminate molded product was obtained by curing at 40°C for one week. As described above, this molded product has a marble-like stone texture, and is very similar in appearance, feel, and depth to marble, but is lighter and easier to handle than marble. The table below shows the properties of the molded product of the present invention in comparison with natural marble.The molded product of the present invention retains the advantages of natural marble, and also has excellent bending strength, stain resistance, and chemical resistance. It is clear that it is superior to natural marble and conventional marble-like molded products.

[Brief explanation of the drawing]

FIGS. 1 and 2 are sectional views of essential parts of an embodiment of the marble-like laminate molded product of the present invention. DESCRIPTION OF SYMBOLS 1... Surface resin layer, 2... Glass microbeads, 4... Intermediate resin layer, 5... Coloring agent, 6... Colored marble pattern layer, 7... Magnesia cement hardened body layer.

Claims (1)

[Scope of utility model registration request] An intermediate resin layer having a colorant and/or a colored pattern layer on the fiber-reinforced magnesia cement hardened body, and a transparent or translucent surface resin layer containing glass microbes in an amount of 1 to 4 times the weight of the resin. A marble-like laminated molded product characterized by being laminated with.