KR20070121371A - Artificial marble containing chip with transparent and light reflecting materials, and process for preparing the same - Google Patents

Abstract

An artificial marble comprising light-reflecting transparent chips is provided to have glittering and light-reflecting effects and display a fancy image equal to natural marble. A method for manufacturing artificial marble includes the steps of: producing a flat panel for a transparent layer(12) having lower specific gravity than artificial marble; forming a flat panel for a high specific gravity layer having higher specific gravity than artificial marble, on the flat panel for a transparent layer; forming a flat panel for a light-reflecting layer(13) beneath the flat panel for a transparent layer; breaking the flat panel laminate to produce light-reflecting chips having increased specific gravity; applying the light-reflecting chips to artificial marble to produce an artificial marble flat panel; and exposing the transparent layer to the surface by sanding the artificial marble flat panel to remove the high specific gravity layer.

Description

Artificial marble containing chip with transparent and light reflecting materials, and process for preparing the same}

1 is a structural diagram of a highly non-neutralized light reflecting chip according to the present invention.

2 is a cross-sectional view of the artificial marble to which the high neutralization light reflection chip according to the present invention is applied.

3 is a cross-sectional view after sanding the artificial marble of FIG.

<Description of the symbols for the main parts of the drawings>

1: artificial marble

1a: background area

10: Highly neutralized light reflection chip

11: high specific gravity

12: transparent layer (low specific gravity layer)

13: light reflecting layer

The present invention relates to an artificial marble and a method for manufacturing the same, in particular, in order to use a transparent low-weight material as a chip, the chip is formed in the artificial marble by including a chip formed integrally by applying a high-weight material to the transparent depth of the artificial marble It relates to an artificial marble for producing a persimmon and light reflection effect and a method of manufacturing the same.

Generally, artificial marble made of acrylic resin has advantages such as brilliant appearance, excellent processability, and superior strength compared to natural marble, and is applied to sinks or counter tops, tables, and various interiors, but is generally known as opaque chips. In the composition of the natural marble or granite compared to the luxurious pattern was limited.

The manufacturing method of acrylic and unsaturated polyester artificial marble is a mixture of methyl methacrylate (MMA), which is generally used as a monomer (monomer), and high molecular weight polymethyl methacrylate (PMMA) or unsaturated polyester (UPE). The main ingredient is a compound in which syrup is mixed with inorganic fillers having specific gravity such as aluminum hydroxide, calcium carbonate, silica, and silicon, and then additives such as initiators, crosslinking agents, chain transfer agents, coupling agents, and pigments are mixed. It is produced by molding and curing in a mold or continuous steel belt.

At this time, a material such as pigment and chip is used as a means of expressing the appearance, and the main component of the chip is PMMA, which is commonly used in the manufacture of artificial marble, but polyvinyl chloride (PVC) and polystyrene having transparency as necessary. Thermoplastic resins, such as thermoplastic resins, such as (PS), or an epoxy and an unsaturated polyester, may be used. Various additives and no pigment or one or more pigments are added to prepare a flat plate in a similar or the same process as in the preparation of artificial marble, and then, a chip is manufactured by grinding them into various sizes.

To date, in order to produce a sparkling effect that is reflected when light is produced during the production of natural marble or silica-based engineered stone, a pearl-like material is directly mixed with a base resin, or a metal or In most cases, a material such as aluminum is used as a chip. Recently, there is an example of using a material such as a mirror to produce a slight depth and reflection effect, but the effect is insignificant.

When materials such as metals or mirrors are applied to acrylic and UPE artificial marbles, their use is extremely limited because of the high hardness of the materials and the difficulty in processing. On the contrary, when a low specific gravity material is used, the chip contains an inorganic filler, so the transparency is extremely reduced regardless of the material.

In addition, even if pearls, metals, glass flakes, or the like are used to produce chips to express light reflection effects, they appear to be on the surface of the artificial marble product, and thus there is a limit in implementing depth.

Korean Patent Laid-Open Publication No. 2004-59913 discloses an acrylic artificial marble characterized by using a chip-in-chip, but this artificial marble also uses an inorganic filler in the whole composition, which decreases the transparency, as well as the material constituting the glitter effect. Located on the surface of the product, it does not realize a sense of depth.

Japanese Patent Laid-Open No. 2001-205750 discloses an artificial marble molded article having an intermediate layer containing a gloss pigment between the transparent gel coat layer and the artificial marble layer. However, the present invention simply provides a glossy layer and a transparent layer on the surface of the artificial marble. It is only coated, it is not related to the utilization of low specific gravity material by high specific gravity as a chip form as in the present invention.

Japanese Patent Application Laid-Open No. 1999-314942 discloses a colored glass powder characterized by crystallizing a calcined glass powder in one or several mixtures selected from compounds of transition metals and rare earth metals while crystallizing 0.1 to 20% by weight. However, the present invention is simply used to fill the glass powder as an artificial marble filler, and is not related to the utilization of a low specific gravity material by high specific gravity as a chip form and a deep light reflection effect as the present invention.

Japanese Patent Laid-Open Publication No. 1995-2556 discloses a resin composition for artificial marble in which a filler is added and mixed with an unsaturated polyester resin composed of an unsaturated polyester and a polymerizable monomer, wherein the filler comprises titanium oxide-coated mica powder as a main component. A resin composition for artificial marble is disclosed, wherein the resin composition comprises 30 to 1% by weight of the filler and 70 to 99% by weight of the inorganic filler. However, the present invention also relates to a filler. Likewise, it is not related to the utilization of low specific gravity material due to high specific gravity and chip light reflection effect.

An object of the present invention is to apply a low specific gravity material to artificial marble.

Another object of the present invention is to impart a shiny effect to the artificial marble, but to give a light reflection effect with a sense of transparency, to produce a more luxurious image closer to the natural marble.

Another object of the present invention is to apply a high specific gravity layer in order to use a low specific gravity material that can produce a transparent depth and light reflection effect, to manufacture integrally with the low specific gravity material and to include it in artificial marble and finally to the chip Due to this, it is to provide an artificial marble containing a chip to produce a sense of depth and light reflection effect and a manufacturing method thereof.

The present invention provides an artificial marble comprising a light reflecting transparent chip having a transparent layer exposed on the surface of the marble and a light reflecting layer laminated thereunder in order to achieve the above object.

The light reflective transparent chip of the present invention is made of a transparent material and a material capable of exhibiting a light reflection effect, and as a result, transparency, depth, and light effect by light reflection can be produced. The sense of depth here means that the transparent material layer has a thickness so that it can represent not only the surface of the marble but also the interior, and the transparent material has a material capable of producing a light reflection effect at the bottom of the transparent material. Located in

The present invention is an artificial marble with a high specific gravity layer having a higher specific gravity than the artificial marble to which the chip is applied, a transparent layer having a specific gravity smaller than the artificial marble and a light reflecting layer comprising a light reflecting material, and an artificial marble applied to the chip and its manufacture. It is about a method.

According to the present invention, a high-intensity inorganic material is prepared after a chip designed to produce a shiny effect by transferring or depositing a metal material on a low specific gravity transparent layer or by coating a surface of a transparent low specific gravity material such as pearl or glass flakes. By integrating with the specific gravity control layer (high specific gravity layer) containing, it solves the disadvantage that the specific gravity is different from the artificial marble to which this chip is applied, and the second sanding removes the high specific gravity layer to produce a deep light reflection effect by the transparent layer. It features.

In the present invention, the specific gravity of the highly non-neutralized light reflecting chip is preferably equal to the specific gravity of the artificial marble raw material composition to which the chip is applied or its specific gravity difference is ± 0.2 or less.

The present invention is characterized by minimizing the specific gravity difference between the highly non-neutralized light reflection chip and the artificial marble raw material composition to which the chip is applied, and there is no specific gravity difference between the highly non-neutralized light reflection chip and the raw material composition, that is, the specific gravity is the same or If the specific gravity difference is less than 0.2, chip separation does not occur.

The present inventors have introduced a transparent low specific gravity material such as acrylic resin to artificial marble raw material to produce artificial marble close to natural stone in pattern and color by reproducing transparency such as quartz and high purity silica included in natural stone. As fillers were not added to ensure transparency of the material, separation of chips occurred due to the difference in specific gravity when low-weight materials were applied to artificial marble in the form of chips.

Specifically, the polymer resin is generally a low specific gravity material having a specific gravity of 1.5 or less, and the specific gravity of the transparent acrylic resin such as polymethyl methacrylate (PMMA) is about 1.17 to 1.20. However, the specific gravity of the artificial marble raw material composition is generally about 1.4 to 1.8.

As such, there is a difference in specific gravity between the transparent resin and the artificial marble raw material composition. When the transparent chip is manufactured from such a resin and applied to the artificial marble, separation of the transparent chip occurs. At present, there is no high specific gravity (more than 1.5) of transparent polymer, so there is no artificial marble product using transparent chip.

In the present invention, by reducing the specific gravity of the transparent low specific gravity material to minimize the specific gravity difference between the chip containing the low specific gravity material and the artificial marble raw material composition, it is possible to produce the same effect as natural quartz without separation of the transparent low specific gravity material. .

In the present invention, the total specific gravity of the highly non-neutralized light reflection chip is preferably 1.3 to 2.0, particularly 1.4 to 1.8, which is similar to the specific gravity of the artificial marble raw material composition. It is preferable that the specific gravity of the high specific gravity layer is 1.5 to 10, especially 2.0 to 8.0 so that the specific gravity of the high specific gravity light reflection chip reaches the above range. The specific gravity of the low specific gravity layer is 0.2 to 2.0 and is usually 1.5 or less.

In the present invention, the low specific gravity layer is preferably a transparent layer having a light transmittance of 70 to 100%, preferably 95% or more. Conventional chips were translucent chips containing a filler such as aluminum hydroxide and having a light transmittance of 60% or less.

In the present invention, the base resin used in the high specific gravity layer and the low specific gravity layer is acrylic resin, unsaturated polyester resin, epoxy resin, polyvinyl chloride (PVC), polystyrene (PS), polycarbonate (PC), polyethylene terephthalate (PET) and the like, and transparent polymer resins such as acrylic resin (PMMA), polyester resin, polyethylene terephthalate (PET) and the like are preferable, and in particular, the low specific gravity layer is preferably a transparent acrylic chip having an acrylic resin as a base resin.

According to the present invention, a transparent acrylic chip having excellent light transmittance and overall physical properties can be directly applied by introducing a high specific gravity layer, thereby not only securing natural reality by producing natural quartz chip effects, but also having a specific gravity difference. Due to the casting process and post-processing such as polishing, which were not applicable, all the methods commonly applied to manufacturing artificial marble are possible.

In the present invention, the high specific gravity layer includes a filler for controlling the specific gravity of the low specific gravity layer, and as a suitable filler, barium, hard coal, stone powder, silica, titanium dioxide, aluminum hydroxide, calcium carbonate, metal powder, metal salt, and the like can be used. The specific gravity of the filler should be at least 2.0 and the preferred specific gravity range is 4.0 to 10. It is advantageous to use a high specific gravity filler to increase the specific gravity control effect.

The light reflection material used for the light reflection layer in the present invention is a metal, pearl, glass flakes, or the like. In the case of metal, the light reflection material is introduced by transfer or vapor deposition, and in the case of pearl or glass flake, it is introduced as an additive via a resin.

When the metal, pearl pigment, glass flakes, etc. are applied to the lower portion of the transparent low specific gravity layer according to the present invention, since the depth corresponding to the thickness of the transparent low specific gravity layer is formed, it is remarkably superior to the conventional light reflection effect expressed only on the surface layer. It can produce light reflection effect.

In the present invention, the artificial marble final product is removed by sanding the high specific gravity layer is exposed to the transparent low specific gravity layer, it is possible to implement a unique appearance effect by the transparent layer.

In the present invention, the shape of the highly non-neutralized light reflection chip is not particularly limited, and may be, for example, a cylindrical or tetrahedron, a hexahedron, or the like, and a hexahedron form is generally used.

In the present invention, in consideration of appearance and moldability, the size of the high specific neutralization chip is 2 to 20 mm, and the amount of the high specific neutralization chip is preferably 0.1 to 50 parts by weight based on 100 parts by weight of the artificial marble raw material composition.

The artificial marble of the present invention is made of acrylic artificial marble, unsaturated polyester artificial marble, or natural stone, quartz, glass, mirror, inorganic filler, etc., and the base resin syrup is used in an amount of 15% by weight or less based on the total weight of artificial marble. Silica-based (Engineered) artificial marble to be produced.

In addition, the present invention comprises the steps of preparing a flat plate for a transparent layer having a specific gravity less than artificial marble; Forming a high specific gravity flat plate having a specific gravity greater than that of artificial marble on top of the transparent flat plate; Forming a plate for the light reflection layer on the lower portion of the transparent layer plate; Pulverizing the laminated flat plate to produce a highly non-neutralized light reflection chip; Manufacturing an artificial marble plate by applying a high-neutralization light reflecting chip; And exposing the transparent layer to the surface by sanding the plate to remove the high specific gravity layer.

By controlling the specific gravity and the amount of the filler added to the high specific gravity flat plate in the present invention, the specific gravity of the high specific gravity light reflecting chip can be adjusted to be equal to or close to the specific gravity of the artificial marble raw material composition.

In the present invention, the hardening method of each flat plate may be cast, press, vibration vibrator, UV hardening, or the like. In the case of a flat plate for a light reflection layer, a metal material may be formed by transferring or depositing the plate or the base resin. Pearl pigments, glass flakes or mixtures thereof can be added and then coated to form.

The present invention provides a chip having a reflection effect on the inner surface of a transparent low specific gravity layer, and by applying the chip to artificial marble, an appearance closer to natural stone can be achieved. In particular, it can provide products that produce a more transparent depth than other existing products.

The present invention uses all materials capable of realizing reflective effects such as pearls, glass flakes, metals, etc., while excluding inorganic fillers that reduce transparency for chip manufacturing and utilizing low specific gravity and high transparency materials. By doing so, it is possible to provide high-quality artificial marble that can achieve almost the same transparency, depth, and glitter effect as glass.

Since the present invention manufactures a chip using a transparent material, when the chip is included in various marbles, the inside of the transparent layer can be seen as it is, thereby realizing a sense of depth, and the bottom surface of the transparent layer is coated or transferred with a material having a light reflection effect. By placing them in the back, they create a sparkling effect in the interior, creating a luxurious exterior pattern that reflects light from the interior, which was not seen in the existing marble. In addition, the method for manufacturing such a chip does not require any additional equipment because the existing methods such as casting and pressing for manufacturing marble can be applied as it is. In addition, it is possible to solve the specific gravity difference between the product compound and the chip, which is one of the most important problems in manufacturing artificial marble. In general, low specific gravity materials such as pure acrylic or UPE resins could not obtain a desired pattern because they are lower than the specific gravity of the compound for artificial marble products.However, in the method of the present invention, the specific gravity of the chip is similar to that of the product compound. Can be tailored to achieve the desired appearance effect.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a structural diagram of a highly non-neutralized light reflecting chip according to the present invention, wherein the highly non-neutralizing light reflecting chip 10 according to the present invention is composed of a high specific gravity layer 11, a transparent layer 12, and a light reflective layer 13 from above. have.

The shape of the highly non-neutralized light reflecting chip 10 is preferably a hexahedral shape shown in the drawings, but is not limited thereto, and may be cylindrical, tetrahedral or more polyhedrons, and may also be regular or irregular.

The stacked structure of the highly non-neutralized light reflection chip 10 is preferably composed of a high specific gravity layer 11, a transparent layer 12 and a light reflection layer 13 from above, as shown in the figure. Although the light reflection layer 13 may be formed on the upper portion of the high specific gravity layer 11, since the light reflection layer 13 is exposed to the surface of the marble product when applied to artificial marble, the depth of the light reflection layer 13 is imparted by the transparent low specific gravity layer 12. Is not possible and is also inadequate in terms of stability and contamination of the light reflecting material. Although the light reflection layer 13 may be composed of an intermediate layer, in this case, the light reflection effect is deteriorated by the opaque high specific gravity layer 11 and the light reflective layer 13 is also a marble product when the high reflective layer 11 is removed by sanding. Exposed on the surface.

The manufacturing process of the highly non-neutralized light reflection chip 10 according to the present invention comprises a manufacturing process of the flat plate for the high specific gravity layer 11, a manufacturing process of the flat plate for the transparent layer 12, and a manufacturing process of the flat plate for the light reflection layer 13 The order of manufacture and lamination of each flat plate is not particularly limited, and three layers are formed by curing one by one, regardless of whether the flat plate is a high specific gravity layer or a flat plate for the light reflection layer.

The artificial marble flat plate for chip manufacturing is obtained by hardening a compound mixed with a polymerizable resin, an inorganic substance, and the like, and the inorganic filler is excluded in the case of the flat plate 12.

The flat plate for the transparent layer 12 is manufactured by hardening to a flat plate shape using a low specific gravity material (specific gravity 0.2 to 2.0). As a low specific gravity material, any general transparent resin can be used, but a polymer resin such as PMMA, PC, and UPE, which are high transparency resins, is suitable in consideration of physical properties and effects. In addition, transparent plates are not limited to their manufacturing method.

When the transparent resin is used as the low specific gravity layer (12), the specific gravity is different from that of the base of artificial marble, so that the surface of the product at the time of hardening (the surface of the product that comes into contact with the steel belt, becomes the surface of the product, and the surface that contacts the air on the other side Rises to the back side), the effect of the actual product is greatly limited. In order to solve this problem, the flat plate for the transparent layer 12 is integrated with the high specific gravity layer 11 using the high specific gravity filler.

The plate for the high specific gravity layer 11 is a slurry containing 50 to 1000 parts by weight of inorganic filler, 0.1 to 10 parts by weight of crosslinking agent, 0.1 to 10 parts by weight of polymerization initiator, and 0.1 to 10 parts by weight of pigment based on 100 parts by weight of the base resin syrup. To harden into a flat plate.

The inorganic filler used in the high specific gravity layer 11 is a material having a high specific gravity (specific gravity 2.0 or more) such as barium, hard coal, stone powder, and silica powder.

The high specific gravity layer 11 and the transparent layer 12 may be composed of two or more multilayers, and the hardening method of each flat plate is generally manufactured of artificial marble such as a casting method, a press method, a vibration vibrator method, and a UV curing method. All methods used in the city are applicable.

The light reflection layer 13 is formed by applying a material capable of producing a sparkling or reflecting effect on the cured flat plate 12. In the case of coating, pearl, glass flakes, etc. may be mixed with the resin component to be thinly coated and then cured, and may be formed using any material capable of producing a similar effect such as transfer or deposition of metal components.

When the manufacturing and lamination of each flat plate is completed, the laminated flat plate is pulverized to manufacture the highly non-neutralized light reflecting chip 10, and the high specific gravity layer 11 and the transparent layer 12 are crushed upon grinding according to the application size of the high non-neutralizing light reflecting chip. The thickness of the transparent layer 12 and the thickness of the high specific gravity layer 11 may be adjusted so as not to peel off.

These three layers work together to create a sense of depth, glitter, and specific gravity in the artificial marble product.

The high specific gravity light reflecting chip of the present invention utilizes a transparent low specific gravity material, and is composed of only a low specific gravity material having high transparency without including an inorganic filler, so that the low specific gravity layer itself can maintain high transparency, and light therein By adopting a material that exhibits a reflective effect, high transparency, a sense of depth and a glistening effect are combined to give a luxurious appearance overall.

2 is a cross-sectional view of the artificial marble to which the high non-neutralized light reflecting chip according to the present invention is applied, and FIG. 3 is a cross-sectional view of the artificial marble of FIG. 2 after sanding, and the high non-neutralizing light reflecting chip 10 manufactured as described above is applied. After manufacturing the artificial marble flat plate, the high specific gravity layer 11 is removed by sanding to expose the transparent layer 12 to the surface of the product. As can be seen in Figure 3, by removing the high specific gravity layer 11, the final product is present in the form of a light reflection transparent chip consisting of a transparent layer 12 and a light reflection layer (13).

EXAMPLE

After producing a transparent low specific gravity flat plate using an acrylic resin (specific gravity: 1.19, light transmittance: 95%), 100 parts by weight of an acrylic resin and 150 parts by weight of barium sulfate (density 4.499), which are high specific gravity fillers, were prepared on the transparent flat plate. After forming a flat plate for specific gravity layer (specific gravity 3.175) using the slurry containing, and then forming a flat plate for light reflection layer using a pearl pigment under the transparent plate, the laminate was pulverized to prepare a high specific gravity light reflection chip. .

The specific gravity of the highly non-neutralized light reflecting chip manufactured as described above was 1.6, and when the artificial marble was manufactured (input amount of 20 wt%), a good product was obtained without layer separation due to the specific gravity difference (± 0.2). By removing the high specific layer by sanding, the transparent layer was exposed on the surface to produce a luxurious image that produces a sparkling effect.

Since the present invention manufactures a chip using a transparent material, when the chip is included in various marbles, the inside of the transparent layer can be seen as it is, thereby realizing a sense of depth, and the bottom surface of the transparent layer is coated or transferred with a material having a light reflection effect. By placing them in the back, they create a sparkling effect in the interior, creating a luxurious exterior pattern that reflects light from the interior, which was not seen in the existing marble. In addition, the method for manufacturing such a chip does not require any additional equipment because it can be applied to existing methods such as casting, pressing for manufacturing marble. In addition, it is possible to solve the specific gravity difference between the product compound and the chip, which is one of the most important problems in manufacturing artificial marble. In general, low specific gravity materials such as pure acrylic or UPE resins could not obtain a desired pattern because they are lower than the specific gravity of the compound for artificial marble products.However, in the method of the present invention, the specific gravity of the chip is similar to that of the product compound. Can be tailored to achieve the desired appearance effect.

Claims (16)

An artificial marble comprising a light reflection transparent chip having a transparent layer exposed on the surface of the marble and a light reflection layer stacked below. The artificial marble according to claim 1, wherein the specific gravity of the transparent layer is 0.2 to 2.0. The artificial marble according to claim 1, wherein the transparent layer has a light transmittance of 70 to 100%. The base resin used in the transparent layer is an acrylic resin, an unsaturated polyester resin, an epoxy resin, polyvinyl chloride (PVC), polystyrene (PS), polycarbonate (PC), polyethylene terephthalate (PET). Artificial marble, characterized in that at least one selected from. The artificial marble according to claim 1, wherein the transparent layer is a transparent chip comprising an acrylic resin or an unsaturated polyester resin as a base resin. The artificial marble according to claim 1, wherein the light reflecting material is at least one selected from metals, pearls, and glass flakes. Preparing a plate for a transparent layer having a specific gravity smaller than that of artificial marble; Forming a high specific gravity flat plate having a specific gravity greater than that of artificial marble on top of the transparent flat plate; Forming a plate for the light reflection layer on the lower portion of the transparent layer plate; Pulverizing the laminated flat plate to produce a highly non-neutralized light reflection chip; Manufacturing an artificial marble plate by applying a high-neutralization light reflecting chip; And A method of manufacturing artificial marble comprising the step of exposing the transparent layer to the surface by sanding the plate to remove the high specific gravity layer. 8. The method of claim 7, wherein the specific gravity of the highly non-neutralized light reflecting chip is equal to the specific gravity of the artificial marble raw material composition to which the chip is applied or the specific gravity difference is ± 0.2 or less. 8. The method of claim 7, wherein the total specific gravity of the highly non-neutralized light reflecting chip is 1.3 to 2.0. 8. The method of claim 7, wherein the specific gravity of the high specific gravity layer is 1.5 to 10. The method of claim 7, wherein the high specific gravity layer comprises a filler having a specific gravity of 2.0 to 10. 12. The method of claim 11, wherein the filler is at least one selected from barium, hard coal, stone powder, silica, titanium dioxide, aluminum hydroxide, calcium carbonate, metal powder, and metal salts. 8. The artificial marble according to claim 7, wherein the specific gravity of the high specific gravity light reflecting chip is adjusted to be equal to or close to the specific gravity of the artificial marble raw material composition by adjusting the specific gravity and the amount of the filler added to the high specific gravity flat plate. Manufacturing method. 8. The method for producing artificial marble according to claim 7, wherein the method for hardening each plate is a method commonly used for manufacturing artificial marble, such as a casting method, a pressing method, a vibration vibrator method, or a UV curing method. 8. The method of claim 7, wherein the flat plate for the light reflection layer is formed by transferring or depositing a metal material. 8. The method for producing artificial marble according to claim 7, wherein the flat plate for the light reflection layer is formed by adding pearl, glass flake or a mixture thereof to the base resin and then coating the flat resin.

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