KR102485395B1 - Artificial marble with marble resin region and manufacturing method thereof - Google Patents

Abstract

The present invention includes (a) molding a marble resin composition and molding and laminating a first base resin composition on the upper surface thereof; and (b) molding and laminating a second base resin composition on the upper surface of the first base resin composition. wherein the first base resin composition and the second base resin composition include an acrylic resin and aluminum hydroxide, and the marble resin composition includes an acrylic resin and aluminum hydroxide. It is about. It also relates to artificial marble manufactured by the manufacturing method of the present invention.

Description

Artificial marble with marble resin region and manufacturing method thereof {Artificial marble with marble resin region and manufacturing method thereof}

The present invention relates to artificial marble formed with a marble resin region capable of implementing a clear and rich marble shape by using the difference in specific gravity between the compositions constituting the artificial marble, and a method for manufacturing the same, which has various shapes according to an agitating motion The present invention relates to artificial marble formed with a marble resin region capable of implementing a clear and rich marble shape, and a method for manufacturing the same.

In general, artificial marble is an artificial product obtained by using natural ore powder or synthetic inorganic material powder as a filter, hardening it into a resin, and then molding it with a compression press, and implementing a texture and pattern close to that of natural marble.

As a substitute for natural marble, artificial marble is used for various purposes such as various countertop materials, dressing tables, sinks, tables, wall materials, floor materials, furniture, interior materials, indirect lighting panels, and interior accessories.

Chips are generally used as a means of expressing the texture of artificial marble. In addition, in order to implement a marble pattern of artificial marble, a technology for implementing a natural wave pattern using pigments is being used.

Korean Patent Registration No. 10-0619635 discloses the first step of manufacturing two or more types of liquid resin for artificial marble to which pigments of different colors are added, respectively, through separate discharge nozzles capable of moving the two or more liquid resins. Disclosed is a continuous manufacturing method of artificial marble, characterized in that it consists of a second step of supplying the liquid resin to irregular positions of the conveying belt and a third step of spreading the liquid resin to each other to form a non-directional pattern and hardening it. However, in the registered patent, since two or more kinds of liquid resin for artificial marble have the same specific gravity and form a pattern through smearing, the clarity of the marble pattern is poor, as shown in FIG. 1 .

The present invention is intended to solve the above problems, and has as a problem to implement a marble resin area having a clear, rich and sharp shape in artificial marble.

To this end, an object of the present invention is to prevent the marble resin composition constituting the marble resin region from spreading or spreading.

In addition, an object of the present invention is to provide a method for manufacturing artificial marble capable of forming a marble resin region of an intended shape by an agitating motion.

In order to achieve the above object, the present invention

(a) molding a marble resin composition and molding and laminating a primary base resin composition on the upper surface; and

(b) molding and laminating a secondary base resin composition on the upper surface of the primary base resin composition;

The primary base resin composition and the secondary base resin composition include an acrylic resin and aluminum hydroxide, and the marble resin composition includes an acrylic resin and aluminum hydroxide.

Provided is a method for manufacturing artificial marble in which a marble resin region is formed.

Also, the present invention

Provided is an artificial marble having a marble resin region, manufactured by the manufacturing method of the present invention.

The manufacturing method of the artificial marble of the present invention can implement a marble resin area having a clear, rich and sharp shape. In addition, the manufacturing method of artificial marble of the present invention is characterized in that marble resin regions having various shapes of intended shapes can be formed by an agitating motion, and the production speed of artificial marble is also increased.

1 is an image showing a surface pattern of a conventional artificial marble.
2 is a schematic diagram showing a state in which the marble resin composition 10 and the primary base resin composition 20 are stacked before agitating.
FIG. 3 is a schematic diagram showing that the marble resin region 11 is formed by the marble resin composition 10 after agitating. It can be seen that the marbled resin composition 10 rises between the first base resin composition 20 and the second base resin composition 30 through agitating to form the marbled resin region 11 having an amorphous shape.
4 is a schematic diagram showing a cross section of the artificial marble of the present invention.
5 is an image showing a surface pattern of artificial marble formed with a marble resin region according to the present invention.

The present invention,

(a) molding a marble resin composition and molding and laminating a primary base resin composition on the upper surface; And

(b) molding and laminating a secondary base resin composition on the upper surface of the primary base resin composition;

The primary base resin composition and the secondary base resin composition include an acrylic resin and aluminum hydroxide, and the marble resin composition includes an acrylic resin and aluminum hydroxide.

The present invention relates to a method for manufacturing artificial marble having a marble resin region.

Also, the present invention

The present invention relates to artificial marble having a marble resin region formed thereon.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings, which are only for exemplifying the present invention and should not be construed as limiting the scope of the present invention.

In the drawings accompanying this specification, parts irrelevant to the description have been omitted in order to clearly describe the present invention, and the same reference numerals are assigned to the same or similar components throughout the specification. In the drawings, the thickness is shown enlarged to clearly express the various layers and regions. Also, in the drawings, the thicknesses of some layers and regions are exaggerated for convenience of description.

Manufacturing method of artificial marble with marble resin area formed

The present invention comprises the steps of (a) molding a marble resin composition and molding and laminating a primary base resin composition on the upper surface thereof; and

(b) molding and laminating a secondary base resin composition on the upper surface of the primary base resin composition;

The primary base resin composition and the secondary base resin composition include an acrylic resin and aluminum hydroxide, and the marble resin composition includes an acrylic resin and aluminum hydroxide.

The present invention relates to a method for manufacturing artificial marble having a marble resin region.

At this time, the specific gravity after curing of the primary base resin composition is 90 to 110% of the specific gravity after curing of the secondary base resin composition,

The specific gravity after curing of the primary base resin composition and the secondary base resin composition is preferably greater than that of the marble resin composition after curing.

The primary and/or secondary base resin composition includes an acrylic resin and aluminum hydroxide. The weight ratio of the acrylic resin and aluminum hydroxide may be 1:1.66 to 1:2.3, preferably 1:1.7 to 1:2.0, and more preferably 1:1.8. In the case of having the above weight ratio, the specific gravity after curing of the primary and/or secondary base resin composition, that is, the specific gravity of the base region is in the range of 1.7 to 1.8, and has a high specific gravity. The composition of the primary base resin composition and the secondary base resin composition may be the same, and may differ from each other as long as the conditions of the primary and/or secondary base resin composition of the present invention are satisfied. The primary base resin composition and/or the secondary base resin composition has a weight ratio of acrylic resin and aluminum tri hydroxide (Aluminium Tri Hydroxide) of 1:1.66 to 1:2.3, and the marble resin composition has a weight ratio of acrylic resin and aluminum hydroxide. is preferably from 1:0.8 to 1:1.2.

In addition, it is preferable that the specific gravity after curing of the primary base resin composition or the secondary base resin composition is 1.7 to 1.8, and the specific gravity after curing of the marble resin composition is 1.40 to 1.50.

The primary and/or secondary base resin composition includes 166 to 230 parts by weight of aluminum hydroxide, 1 to 5 parts by weight of a crosslinking agent, 0.05 to 0.10 parts by weight of a peroxide compound, and 1 to 2 parts by weight of an additive, based on 100 parts by weight of an acrylic resin. wealth may be included.

The marble resin composition may include 80 to 120 parts by weight of aluminum hydroxide, 1 to 5 parts by weight of a crosslinking agent, 0.05 to 0.10 parts by weight of a peroxide compound, and 1 to 5 parts by weight of an additive, based on 100 parts by weight of the acrylic resin.

The acrylic resin and aluminum hydroxide included in the marble resin composition may be the same as or different from the acrylic resin and aluminum hydroxide included in the primary and/or secondary base resin composition, respectively. Preferably, the acrylic resin and aluminum hydroxide contained in the primary and/or secondary base resin composition and the marble resin composition may be the same.

However, when the same resin and the same aluminum hydroxide are used in the primary and/or secondary base resin composition and the marble resin composition, the marble shape formed by the marble resin composition, that is, the clarity of the marble resin region may be deteriorated. . Therefore, the first and/or second base resin composition and the marble resin composition have a high specific gravity and the marble resin composition have a low specific gravity by differently adjusting the content of aluminum hydroxide in the first and/or second base resin composition and the marble resin composition. . That is, both the primary base resin composition and the secondary base resin composition should have higher specific gravity than the marble resin composition.

The primary and/or secondary base resin composition includes 166 to 230 parts by weight of aluminum hydroxide, 1 to 5 parts by weight of a crosslinking agent, 0.05 to 0.10 parts by weight of a peroxide-based compound as a curing agent, and 1 to 230 parts by weight of an additive, based on 100 parts by weight of an acrylic resin. It is characterized in that it contains 2 parts by weight.

The marble resin composition includes an acrylic resin and aluminum hydroxide. The weight ratio of the acrylic resin and aluminum hydroxide may be 1:0.8 to 1:1.2, 1:0.85 to 1:1.15, preferably 1:0.9 to 1:1.1, more preferably 1:0.85 to 1:1.15. : can be 1. In the case of having the above weight ratio, the specific gravity after curing of the marble resin composition, that is, the specific gravity of the cured marble resin region is within the range of 1.40 to 1.50, and has a low specific gravity.

In addition, the marble resin composition includes 80 to 120 parts by weight of aluminum hydroxide, 1 to 5 parts by weight of a crosslinking agent, 0.05 to 0.10 parts by weight of a peroxide compound, and 1 to 5 parts by weight of an additive, based on 100 parts by weight of the acrylic resin. to be

The primary and/or secondary base resin composition has a higher aluminum hydroxide content than the marble resin composition, and in this case, a marble resin region having an amorphous, clear and rich marble shape can be better formed on the surface of the artificial marble. there is.

In addition, the primary and/or secondary base resin composition has a weight ratio of acrylic resin and aluminum hydroxide of 1:1.66 to 1:2.3, and the marble resin composition has a weight ratio of acrylic resin and aluminum hydroxide of 1:0.8 to 1:0.8 to 1: It is characterized by being 1.2.

The specific gravity after curing of the primary and/or secondary base resin composition, that is, the specific gravity of the base region is 1.7 to 1.8, preferably 1.73 to 1.77, and more preferably 1.74 to 1.76. The specific gravity of the marble resin composition after curing, that is, the specific gravity of the cured marble resin region is 1.40 to 1.50, preferably 1.42 to 1.48. Due to the difference in specific gravity between the first and/or second base resin composition and the marble resin composition, the marble resin composition moves while having a clear boundary without spreading or spreading inside the first and/or second base resin composition, so it is clear and a marble resin region having a rich marble shape. In addition, a clear and rich marble resin region having a clear boundary may be formed without separation between the marble resin region and the base region where the primary and/or secondary base resin composition is cured.

In one embodiment of the present invention, the specific gravity after curing of the primary and/or secondary base resin composition, that is, the specific gravity of the base region is 1.7 to 1.8, and the specific gravity after curing of the marble resin composition, that is, the cured marble resin region The specific gravity of is 1.40 to 1.50. That is, the specific gravity after curing of the primary and/or secondary base resin composition is greater than the specific gravity after curing of the marble resin composition. When the resin has a specific gravity within the above range after curing, it is possible to form a marble resin region having a clear and rich shape with a clear boundary without separation between the primary and/or secondary base region and the marble resin region.

In addition, the method for manufacturing artificial marble having a marble resin region according to the present invention (a) molds a marble resin composition, molds and laminates a primary base resin composition on the upper surface, and performs agitating, so that the marble resin composition is formed in the first forming a marble resin region while rising between the tea base resin composition; (b) molding and depositing a second base resin composition on the upper surface of the first base resin composition and performing agitating to form a marble resin region while the marble resin composition rises between the second base resin compositions; and (c) after curing, sanding the lower surface of the cured marble resin composition to expose the marble resin region; In this case, the primary and secondary base resin compositions include an acrylic resin and aluminum tri hydroxide, and the marble resin composition includes an acrylic resin and aluminum hydroxide (Aluminium Tri Hydroxide), It is characterized in that the specific gravity is lower than the primary and secondary base resin compositions.

In step (a), the thickness of the marble resin composition is 1.0 mm to 2.0 mm, the thickness of the primary base resin composition is 5.5 mm to 7 mm after curing, and the thickness of the secondary base resin composition after curing in step (b) may be 5.5 mm to 7 mm. In addition, since the step (c) is characterized by sanding the lower surface of the cured marble resin composition by 1 mm to 2 mm, the thickness of the primary base resin composition after performing the sanding in step (c) is 6 mm to 6.5 mm. mm, and the thickness of the secondary base resin composition may be 6 mm to 6.5 mm. Preferably, the thickness of the primary base resin composition and the secondary base resin composition, that is, the base region, after sanding is 12 mm to 13 mm. When stacked with the thickness ratio as described above, an appropriate amount of the marbled resin composition spreads inside the base resin composition to form a marbled resin region, thereby forming an appearance similar to that of natural marble.

In the present invention, since the marble resin composition of low specific gravity goes through the step of being laminated under the primary and secondary base resin compositions of high specific gravity, the entire marble resin composition of low specific gravity is spontaneously primary by gravity without external power. And/or passing through the interior of the secondary base resin composition and moving to the upper surface of the artificial marble, a problem arises in which a marble pattern like that of natural marble cannot be realized.

Therefore, by making the primary and/or secondary base resin composition and the marble resin composition have a certain range of viscosities, only when agitation is performed by an agitator, that is, only when external mixing is performed by an external force. A clear marbled resin region can be implemented by allowing the low specific gravity marble resin composition to pass through the high boiling primary and/or secondary base resin composition and move upward at the position where data is stirred. In addition, since the marble resin region can be formed in an intended shape by the agitating motion, various marble patterns can be implemented by varying the agitating motion, thereby having excellent marble resin region expandability.

To this end, the base resin composition may have a viscosity of 5500cps to 8000cps, preferably 6500cps to 7500cps. The viscosity of the marble resin composition may be 2000 cps to 5000 cps, preferably 2200 cps to 4500 cps. The viscosity can be measured at 30 rpm using a Brookfield viscometer 64spindle.

At this time, agitating can be performed using an agitator while laminating (a) the first base resin composition, and in (b), when the second base resin composition is molded and laminated on the upper surface of the first base resin composition, Agitating may be performed using an agitator while stacking. At this time, the amount and stacking speed of the primary base resin composition and the secondary base resin composition supplied from the metering pump may be adjusted using a valve.

By laminating the base resin composition in two layers with the primary base resin composition and the secondary base resin composition, a marble resin region having a rich shape can be expressed using a smaller amount of the marble resin composition than when the base resin composition is used as a single layer. and in the manufacturing process, the speed of the line can be increased. Therefore, when the base resin composition is laminated in two layers, the marble resin region is more visible to the naked eye from the outside even when the same amount of the marble resin composition is used.

The primary and/or secondary base resin composition includes 166 to 230 parts by weight of aluminum hydroxide, 1 to 5 parts by weight of a crosslinking agent, 0.05 to 0.10 parts by weight of a peroxide compound, and 1 to 2 parts by weight of an additive, based on 100 parts by weight of an acrylic resin. wealth may be included.

The marble resin composition may include 80 to 120 parts by weight of aluminum hydroxide, 1 to 5 parts by weight of a crosslinking agent, 0.05 to 0.10 parts by weight of a peroxide compound, and 1 to 5 parts by weight of an additive, based on 100 parts by weight of the acrylic resin.

The marble resin composition of the present invention may further include chip powder. Chip powder included in the marble resin composition is a means for expressing the texture of natural marble and at the same time serves to control the viscosity of the marble resin composition to maintain a constant viscosity. A marble resin composition that does not contain chip powder has a high amount of resin compared to the filler compared to the base composition, so the viscosity is inevitably low. In this case, the viscosity of the marble resin composition having low viscosity is increased by including chip powder, thereby increasing the marble resin composition. Since the composition does not spread easily, workability is improved and a marble resin area having a clear and rich shape can be realized.

The chip powder may be any one of acrylic-based chip powder, epoxy-based chip powder, styrene-based chip powder, and polyester-based chip powder.

As the chip fine powder, fine powder having a size of 200 μm or less may be used. In addition, it is preferable to use fine powder having a size of 50 μm to 150 μm, more preferably 60 μm to 100 μm. Chip powder can express texture and pattern similar to natural marble by having various particle sizes within the above range.

The marble resin composition may include 3 to 8% by weight of chip powder. It may preferably contain 3 to 4% by weight. For example, the marble resin composition may include 5 to 20 parts by weight of chip powder based on 100 parts by weight of the acrylic resin. When the content is within the above range, the viscosity of the marble resin composition is 2000 cps to 5000 cps, preferably 2200 cps to 4500 cps.

The acrylic resin may be at least one selected from methacrylic acid, methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, and 2-ethylhexyl methacrylate and polymers thereof However, it is not limited thereto. Preferably it may be polymethyl methacrylate.

The marble resin composition and the primary and/or secondary base resin composition may further include a crosslinking agent, a peroxide-based compound, and an additive.

The crosslinking agent may be at least one selected from trimethylolpropane trimethacrylate (TMPTMA), trimethylolpropane methacrylate (TMPMA), and ethylene glycol dimethacrylate (EGDMA).

The peroxide-based compound serves to initiate a curing reaction and includes tert-butylcyclohexyl peroxydicarbonate, benzoyl peroxide, dicumyl peroxide, butyl hydroperoxide, cumylhydroperoxide, t-butylperoxy maleic acid, It may be at least one selected from t-butyl hydroperoxide, acetyl peroxide, lauroyl peroxide, azobisisobutyronitrile, and azobisdimethylvaleronitrile.

The additive may be at least one selected from a color imparting agent, an antifoaming agent, a coupling agent, an ultraviolet absorber, a light diffusing agent, a polymerization inhibitor, an antistatic agent, a flame retardant, and a heat stabilizer.

Marble resin compositions of various colors may be prepared by mixing a color imparting agent with the marble resin composition, and a marble resin region having a marble shape like natural marble may be implemented by mixing one or more of them. Preferably, by including three or more colors, an appearance closer to that of natural marble can be realized.

(a) molding a marble resin composition and molding and laminating a primary base resin composition on the upper surface thereof

The manufacturing method of artificial marble having a marble resin region according to the present invention includes the steps of (a) molding a marble resin composition and then molding and laminating a first base resin composition on the top surface of the marble resin composition. In the step (a), (a) a marble resin composition is molded, a primary base resin composition is laminated by molding, and agitating is performed so that the marble resin composition rises between the primary base resin compositions and the marble resin It may be a step of forming a region.

The primary base resin composition includes an acrylic resin and aluminum hydroxide, and the marble resin composition includes an acrylic resin and aluminum hydroxide.

In the step (a), the marble resin composition is molded, and the first base resin composition is laminated by molding the upper surface, and agitating is performed to form a marble resin region while the marble resin composition rises between the first base resin compositions. It may be a step to

Preferably, the weight ratio of acrylic resin and aluminum hydroxide in the primary base resin composition is 1:1.66 to 1:2.3, and the weight ratio of acrylic resin and aluminum hydroxide in the marble resin composition is 1:0.8 to 1:1.2.

In addition, the specific gravity after curing of the primary base resin composition is 1.7 to 1.8, and the specific gravity after curing of the marble resin composition is preferably 1.40 to 1.50.

The marble resin composition may further include chip powder.

2 shows that the marble resin composition is molded and the primary base resin composition is molded and laminated on the upper surface thereof. This is a state before agitating is performed.

(b) molding and laminating a secondary base resin composition on the upper surface of the primary base resin composition

The method of manufacturing artificial marble having a marble resin region according to the present invention includes (b) molding and laminating a second base resin composition on an upper surface of the first base resin composition.

The secondary base resin composition includes an acrylic resin and aluminum hydroxide, and the marble resin composition includes an acrylic resin and aluminum hydroxide.

In the step (b), a second base resin composition is molded and laminated on the upper surface of the first base resin composition, and agitating is performed to form a marble resin region while the marble resin composition rises between the second base resin compositions. may be a step.

Preferably, the secondary base resin composition has a weight ratio of acrylic resin and aluminum hydroxide of 1:1.66 to 1:2.3, and the marble resin composition has a weight ratio of acrylic resin and aluminum hydroxide of 1:0.8 to 1:1.2.

In addition, it is preferable that the specific gravity after curing of the secondary base resin composition is 1.7 to 1.8, and the specific gravity after curing of the marble resin composition is 1.40 to 1.50.

3 shows that, in steps (a) and (b), the first base resin composition 20 and the second base resin composition 30 are laminated on the upper surface on which the marble resin composition is molded, and the marble resin composition 10 is Agitating is performed through an agitator so that the marble resin composition 10 of low specific gravity rises between the first base resin composition 20 and the second base resin composition 30 due to the difference in specific gravity, thereby forming an amorphous Formation of the marble resin region 11 having a shape is shown. Through this, the marble resin area 11 can be formed in the intended shape by the agitating motion, and the marble resin area 11 in various shapes can be implemented by varying the agitating motion, thereby expanding the marble resin area The castle is excellent.

(c) performing curing and sanding the lower surface of the cured marble resin composition to expose the marble resin region;

The method of manufacturing artificial marble having a marble resin region according to the present invention further includes the step of (c) curing after step (b), and exposing the marble resin region by sanding the lower surface of the cured marble resin composition. can do.

After sanding, the thickness of the marble resin composition may be 1.0 mm to 2.0 mm, and the thicknesses of the primary base resin composition and the secondary base resin composition may be 12 mm to 13 mm.

4 shows that after curing is performed in the state where the marble resin region 11 is formed by steps (a) and (b), the lower surface of the cured marble resin composition 10 is sanded to form the marble resin region ( 11) is exposed to show that the artificial marble 100 is manufactured. It is preferable to sand the lower surface of the cured marble resin composition by 1 mm to 2 mm, and it is more preferable to sand by 1 mm to 1.5 mm.

At this time, the lower surface of the cured marble resin composition where the marble resin region 11 is exposed becomes the surface of the artificial marble on which the marble resin region according to the present invention is formed.

Artificial marble with marble resin region of the present invention

The present invention may be an artificial marble with a marble resin region formed by the manufacturing method of the present invention.

The artificial marble formed with the marble resin region of the present invention includes a base region and a marble resin region. The artificial marble having the marble resin region of the present invention includes a first base resin composition containing an acrylic resin and aluminum hydroxide, a base region obtained by curing a second base resin composition, and an acrylic resin and aluminum hydroxide, and the first base resin composition and an amorphous marble resin region obtained by curing a marble resin composition having a specific gravity lower than that of the secondary base resin composition.

That is, the base region is a region in which the first base resin composition and the second base resin composition are cured.

The marble resin region is a region in which the marble resin composition is cured. Preferably, the marbled resin region refers to a marbled resin composition or a cured product thereof having a shape in which the marbled resin composition spreads out in an amorphous form by agitating. That is, before agitating, the marbled resin composition exists, and after agitating, the marbled resin composition forms a marbled resin region. Marble resin area refers to patterns appearing on the surface and inside of artificial marble, which is the final product.

The artificial marble of the present invention includes a base region cured with a secondary base resin composition that contacts the base region cured with the primary base resin composition in a direction opposite to the marble resin region. At this time, since agitating is performed after casting the secondary base resin composition, the interface between the cured portion of the primary base resin composition and the cured secondary base resin composition is not visible to the naked eye.

The specific gravity after curing of the base region is 1.7 to 1.8, and the specific gravity after curing of the marble resin composition is 1.40 to 1.50.

The marble resin composition may further include chip powder, and the marble resin region may include chip powder.

The artificial marble having a clear and rich marble resin region according to the present invention can implement a clear, rich, and sharp marble shape and/or pattern. In addition, the artificial marble manufactured by the manufacturing method of the present invention can implement a marble color and marble pattern almost similar to natural marble. In addition, the artificial marble manufactured by the manufacturing method of the present invention can implement marble resin regions having various shapes and/or patterns according to the agitating motion.

In this case, the thickness of the marble resin composition may be 1.0 mm to 2.0 mm, the thickness of the primary base resin composition after sanding may be 6 mm to 6.5 mm, and the thickness of the secondary base resin composition may be 6 mm to 6.5 mm. . Preferably, the thickness of the base region after sanding, that is, the primary base resin composition and the secondary base resin composition, is 12 mm to 13 mm.

Advantages and features of the present invention, and how to achieve them, will become clear with reference to the detailed description of the following embodiments. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various forms different from each other, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims.

Example

Hereinafter, the configuration and operation of the present invention will be described in more detail through preferred embodiments of the present invention. However, this is presented as a preferred example of the present invention and cannot be construed as limiting the present invention by this in any sense.

1. Preparation of base resin composition

Polymethyl methacrylate (PMMA) 100 parts by weight, aluminum hydroxide (Aluminium Tri Hydroxide, ATH) 180 parts by weight, EGDMA (ethylene glycol dimethacrylate) 3 parts by weight butyl hydroperoxide 0.05 parts by weight, additive 1.2 parts by weight mixed After curing, a base resin composition having a specific gravity of 1.73 and a viscosity of 6500 cps was prepared.

2. Preparation of Marble Resin Composition

Polymethyl methacrylate (PMMA) 100 parts by weight, aluminum hydroxide (Aluminium Tri Hydroxide, ATH) 100 parts by weight, EGDMA (ethylene glycol dimethacrylate) 3 parts by weight butyl hydroperoxide 0.05 parts by weight, additives 1.7 parts by weight, A marble resin composition having a specific gravity of 1.43 and a viscosity of 3000 cps was prepared by mixing 3.5 parts by weight of acrylic chip powder.

<Example 1> Preparation of artificial marble

The marbled resin composition was cast into a conveyor mold with a thickness of 1.0 mm and a speed of 3.0 M/min. At this time, when the marble resin composition was moved along the casting line, the first base resin composition was injected into the upper surface to a thickness of 7 mm, and upon contact with the marble resin composition, it was stirred with an agitator to form a marble resin region. In addition, the second base resin composition was injected into the first base resin composition to a thickness of 6 mm, and upon contact with the first base resin composition, it was stirred with an agitator to further form a marbled resin region. After curing at 80° C. for 50 minutes, artificial marble was prepared by sanding the lower surface to a thickness of 1 mm so that the marble resin region was exposed on the surface.

As a result, it can be confirmed that a marble resin area having a vivid and rich shape appeared, unlike the pattern of the conventional artificial marble in FIG. 1 (FIG. 5).

<Comparative Example 1> Manufacture of artificial marble

After the marble resin composition was put into a conveyor mold with a thickness of 2 mm and a speed of 1.0 M/min, a base resin composition was injected and laminated on the upper surface of the mold with a thickness of 12 mm. Next, the marble resin composition and the base resin composition are stirred with an agitator to form a marble resin region, cured at 80 ° C. for 50 minutes, and then sanded to a thickness of 1 mm from the lower surface so that the marble resin region is exposed on the surface. Thus, artificial marble was manufactured.

As a result, the same artificial marble as in Example 1 was prepared.

Both Example 1 and Comparative Example 1 showed clear and rich marble resin regions, unlike the conventional pattern of artificial marble in FIG. 1 . However, in Example 1, the production speed was significantly increased compared to Preparation Example 1, so that artificial marble could be produced in a short time.

10: marble resin composition
11: marble resin area
20: primary base resin composition
30: secondary base resin composition
100: artificial marble

Claims (11)

(a) casting a marble resin composition and molding and laminating a primary base resin composition on the top surface of the marble resin composition and performing agitating; and
(b) molding and laminating a secondary base resin composition on the upper surface of the primary base resin composition;
The first base resin composition or the second base resin composition includes an acrylic resin and aluminum hydroxide, and the marble resin composition includes an acrylic resin and aluminum hydroxide,
The specific gravity after curing of the primary base resin composition or the secondary base resin composition is greater than the specific gravity after curing of the marble resin composition,
A method for manufacturing artificial marble having a marble resin region.
According to claim 1,
The step (a) is a step in which a marble resin composition is molded, a base resin composition is laminated by molding, and agitated is performed to form a marble resin region while the marble resin composition rises between the base resin compositions. characterized by,
A method for manufacturing artificial marble having a marble resin region.
According to claim 1,
In the step (b), a second base resin composition is molded and laminated on the upper surface of the first base resin composition, and agitating is performed to form a marble resin region while the marble resin composition rises between the second base resin compositions. Characterized in that the step,
A method for manufacturing artificial marble having a marble resin region.
According to claim 3,
Further comprising the step of (c) curing after the step (b) and exposing the marble resin region by sanding the lower surface of the cured marble resin composition,
A method for manufacturing artificial marble having a marble resin region.
According to claim 3,
The specific gravity after curing of the primary base resin composition is 90 to 110% of the specific gravity after curing of the secondary base resin composition,
Characterized in that the specific gravity after curing of the primary base resin composition and the secondary base resin composition is greater than the specific gravity after curing of the marble resin composition,
A method for manufacturing artificial marble having a marble resin region.
According to claim 1,
The primary base resin composition or the secondary base resin composition has a weight ratio of acrylic resin and aluminum hydroxide of 1:1.66 to 1:2.3, and the marble resin composition has a weight ratio of acrylic resin and aluminum hydroxide of 1:1.35 to 1:1.55. sign
A method for manufacturing artificial marble having a marble resin region.
According to claim 1,
The specific gravity after curing of the primary base resin composition or the secondary base resin composition is 1.7 to 1.8, and the specific gravity after curing of the marble resin composition is 1.40 to 1.50.
A method for manufacturing artificial marble having a marble resin region.
According to claim 1,
Characterized in that the marble resin composition further comprises chip powder,
A method for manufacturing artificial marble having a marble resin region.
The method of claim 4, wherein the thickness of the marble resin composition after sanding is 1.0 mm to 2.0 mm, and the thickness of the primary base resin composition and the secondary base resin composition is 12 mm to 13 mm,
A method for manufacturing artificial marble having a marble resin region.
delete An artificial marble having a marble resin region, manufactured by the method of any one of claims 1 to 9.

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