KR20170124924A - Panel for high weatherability bath having pearl luster and method for preparing the same - Google Patents

Abstract

The present invention relates to a panel for a highly weatherproof bathtub which maintains durability and maintains pearl luster by constructing a perlite coating layer made of a transparent PMMA resin in which pearl grains are uniformly distributed on both surfaces of an opaque ASA resin panel, .
Namely, a gloss resin composition step (S1) of uniformly distributing 2 to 5% by weight of pearl luster powder holding particles of 0.2 to 1 lb in 95 to 98% by weight of PMMA resin fillet to form a gloss mixture, (S2) of feeding the ASA molten resin heated by the main extruder (31) to the feed block (30) and feeding the gloss mixture into the auxiliary block extruder The molten resin heated at the center portion by 80 to 90% by volume and heated by the plurality of auxiliary extruders 32 is supplied to the upper and lower ends of the feed block 30 so as to be symmetrical with 5 to 10% A gloss sheet 11 holding a molten glossy resin at a thickness of 5 to 10 on the upper and lower surfaces of both sides of the built-in panel 10 for discharging the ASA molten resin to maintain a thickness of 80 to 90% (S4) for forming a base panel (1b) having a cross section for maintaining a state in which the base panel The glossy sheet 11 which maintains a thickness of 5 to 10% is brought into close contact with the upper and lower surfaces of both sides of the built-in panel 10 which keeps a thickness of 80 to 90% at the center portion through the plurality of pressing rollers 20 (S5) of forming a molding panel (1a) by pressing the upper surface of the molding panel (1a) in a continuous length to form a molding panel (1a);
2 to 5% by weight of a pearlescent powder with a particle size of 0.2 to 1 kPa is added to 95 to 98% by weight of PMMA resin on both surfaces of an opaque built-in panel 10 made of ASA resin which maintains a thickness of 80 to 90% And the surface sheet of the transparent body, which is evenly distributed and has a thickness of 5 to 10%, is adhered closely to each other to maintain the integrally formed cross-section.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel for high weatherability bathtubs,

The present invention relates to a panel for high-weatherability bathtub maintaining pearl gloss and a method for manufacturing the same. More particularly, the present invention relates to a panel for PMMA resin which is made of a transparent PMMA resin in which pearl grains are evenly distributed on both surfaces of an opaque ASA resin panel To a panel for a highly weatherproof bathtub in which a pearl coating layer is formed to maintain pearl luster and a manufacturing method thereof.

Generally, in order to constitute a bathtub as a bathtub in a broad sense (hereinafter referred to as a bathtub) including a bath bath, a bathtub (large bath), a sink bath (large bath) and the like, (PMMA) homopolymer, and the lower layer is a resin sheet of a two-layer structure composed of a blend of PMMA and an acrylonitrile-butadiene-styrene (ABS) resin. The weather resistance and high weather resistance But the stress cracking resistance is unsatisfactory and the gloss or pattern of the surface can not be expressed.

In recent years, in order to make the surface of the bathtub panel look good, as can be confirmed through "a resin sheet having a perlite gloss or pattern and a bathtub using the same" of the registered patent No. 10-1414058, A core layer containing a general PMMA resin and a pearl master batch, and a base layer containing an ABS resin, wherein the core layer comprises a general PMMA resin 70 To 90% by weight and a pearl master batch of 10 to 30% by weight, wherein the pearl master batch comprises 98 to 99.5% by weight of general PMMA and 0.5 to 30% by weight of gold, silver, aluminum, titanium, manganese, chromium, magnesium, 2% by weight ", and the mechanical properties such as weather resistance, high weather resistance, scratch resistance and stress cracking resistance Because it has excellent pearl gloss or pattern with excellent surface gloss and aesthetics, it can be applied to furniture, kitchen utensil, bathtub or shower booth so as to increase the value of the product.

However, the substrate layer made of ABS resin has excellent practical properties in terms of processability and high weatherability, but it is not only subject to restrictions in its use in products that require heat resistance and is easily deformed by heat, and is also resistant to air, oxygen, ozone, There is a disadvantage in that it causes discoloration and deterioration of physical properties, and therefore weatherability is required. In addition, in order to shorten the drying time due to a long drying time during extrusion, And thus the water absorption rate is increased when it is left in the room temperature air, so that the shrinkage ratio with PMMA which is integrally adhered on one side is changed and it is bent in one plane direction. However, This is also the case with the processing companies that produce this bathtub. Is a situation that does not provide a solution.

KR Patent No. 10-0256913 KR Patent No. 10-1414058

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a surface sheet containing pearl luster on both surfaces of a built- A panel for a bathtub which basically prevents moisture from being contained in the air, and which prevents discoloration and deterioration of physical properties caused by contact with oxygen, ozone, ultraviolet rays and the like in the air, Which is smooth and both surfaces smooth, and which does not bend or warp to one side even when exposed to moisture for a long period of time, and a manufacturing method thereof. .

A polish resin composition step (S1) comprising 95 to 98% by weight of PMMA resin fillet and 2 to 5% by weight of pearl luster powder which maintains particles of 0.2 to 1 psi and evenly distributing to form a gloss mixture;

(S2) of injecting the ASA resin fillet into the main extruder (31), and separately injecting the gloss mixture formed through the gloss resin composition step (S1) into the plurality of auxiliary extruders (32);

The ASA resin filler flowing into the main extruder 31 through the resin material feeding step S2 is heated and maintained at a temperature of 230 to 260 DEG C so that the ASA molten resin is fed to the central portion of the feed block 30 in an amount of 80 to 90% And the gloss mixture flowing into the plurality of auxiliary extruders 32 is heated and held at a temperature of 240 to 260 DEG C to melt the resin. (S3) in which the molten resin is injected to be symmetrical at 5 to 10% by volume in the lower end portion;

(30) on the upper and lower surfaces of both sides of the built-in panel (10) for discharging the ASA molten resin held in the central portion of the feed block (30) through the molten resin distribution step (S3) . (S4) for forming a base panel (1b) having a cross section for maintaining a state in which the gloss sheet (11) to be discharged is kept in close contact so as to maintain a thickness of 5 to 10% ;

The base panel 1b discharged through the base panel molding step S4 is guided through the plurality of pressing rollers 20 and the upper and lower surfaces of both sides of the built-in panel 10 maintaining a thickness of 80 to 90% A molding panel pressing step (S5) of forming a molding panel (1a) by pressing with a length of 800 mm to 1800 mm and a length continuously formed with the gloss sheet (11) maintaining a thickness of 5 to 10% in close contact;

The surface of the molding panel 1a holding the gloss sheet 11 holding the pearl gloss on both sides of the surface maintaining a constant thickness and width through the molding panel pressing step S5 is subjected to electrostatic elimination (S6) such as a drying operation in which the cut bath panel is mounted and dried, are successively carried out after the cooling operation is performed and then the cutting operation is performed to cut the cutting blade (50) Through a method of manufacturing a panel for a gloss bath;

2 to 5% by weight of a pearlescent powder with a particle size of 0.2 to 1 kPa is added to 95 to 98% by weight of PMMA resin on both surfaces of an opaque built-in panel 10 made of ASA resin which maintains a thickness of 80 to 90% And the surface sheet of the transparent body, which is evenly distributed and has a thickness of 5 to 10%, is adhered closely to each other to maintain the integrally formed cross-section.

By producing a bathtub panel which can reduce the production period by integrally forming a surface sheet containing pearl luster on both surfaces of the built-in panel, while preventing the moisture content of the built-in panel from being fundamentally prevented during future use It is possible to form a built-in panel that maintains high weatherability, which is hard to cause deterioration of weathering, which is fundamentally preventing discoloration and deterioration of properties caused by contact with oxygen, ozone zone, ultraviolet rays, etc. in the air, The bathtub panel can be manufactured at a low cost and the consumers can easily purchase a low-cost, high-quality bathtub. In addition, the bathtub panel can be easily bent, There are so many bars and big inventions.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a manufacturing method of a manufacturing process according to a preferred embodiment of the present invention; FIG.
FIG. 2 is an overall process configuration diagram for explaining a panel manufacturing method according to a preferred embodiment of the present invention. FIG.
3 is a perspective view showing a configuration of a panel according to a preferred embodiment of the present invention.
4 is a sectional view of a bathtub formed by a panel showing a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram of a manufacturing method sequentially illustrating a manufacturing process according to a preferred embodiment of the present invention. FIG. 1 is a detailed block diagram of a bathtub panel and a method of manufacturing the same according to the present invention. However, the present invention is not limited to the following examples.

One embodiment)

After conducting a gloss resin composition step (S1) for forming a gloss mixture by uniformly distributing 3 to 3 cm of pearl luster powder to keep particles of 0.2 to 1 lsm in the PMMA resin fillet of 97 cm 3;

(100 cm 3) of the gloss mixture formed through the gloss resin composition step (S 1) is divided into a plurality of auxiliary extruders (32) S2);

The ASA resin filler flowing into the main extruder 31 through the resin raw material feeding step S2 is heated and maintained at a temperature of 240 DEG C so that 500 cm3 of the ASA molten resin is fed into the central portion of the feed block 30 A gloss gloss resin, which is heated and maintained at a temperature of 250 ° C, is fed into a plurality of auxiliary extruders (32) And the lower end of the molten resin is divided into 50 cm 3 and symmetrically;

The ASA molten resin held in the central portion of the feed block 30 holding the outlet maintaining the height of 12 mm and the width of 800 mm is discharged through the molten resin distribution step S3 so as to maintain the thickness of 10 mm at the center of the outlet On the upper and lower surfaces on both sides of the built-in panel (10) on the feed block (30). The base sheet 1b having a cross section of 12 mm in thickness and 800 mm in width is formed in a state in which the gloss sheet 11 which discharges is closely adhered to maintain the thickness of 1 mm, After the base panel molding step S4,

The base panel 1b discharged through the base panel molding step S4 is pressed against the plurality of pressing rollers 20 such as the entering roller 21 and the advancing roller 22 and the forming roller 23 and the guiding roller 24 And the gloss sheet 11 made of a gloss mixture held on the upper and lower surfaces of both sides of the built-in panel 10 is held at a thickness of 5 mm while the built-in panel 10 made of ASA resin is maintained at a thickness of 5 mm, A molding panel pressing step (S5) of forming a molding panel (1a) by pressing the molding panel (1a) maintaining a total thickness of 6 mm while maintaining the thickness so as to maintain a continuous length of the molding panel (1a) maintaining a width of 1000 mm;

The forming panel 1a holding the pearl luster on both sides of the surface is maintained at a constant thickness of 6 mm and a width of 1000 mm through the molding panel pressing step S5, 1a is provided with a surface treatment port 40 such as an air nozzle or ionizing eye to spray the air to cool the molded panel 1a or remove the static electricity generated on the surface of the molded panel 1a A cutting operation for cutting the surface-treated molded panel 1a to a length of 2000 mm, a drying operation for loading and drying the cut bath panel 1, and the like are sequentially performed, and then the processing step S6 is sequentially performed As shown in FIG. 4, it can be seen that the process for producing a panel for a surface pearl glossy bath is proceeded to produce a bathtub panel capable of producing an ordinary personal bathtub.

The panel 1 for a highly weatherproof bathtub which retains the pearl luster produced through the above-described method for producing a glossy sheet for a bath is made of ASA resin having a thickness of 5 mm, 3 wt% of pearl luster powder of 0.2 to 1 wt% of the particles was uniformly dispersed in 97 wt% of PMMA resin, and the gloss sheet 11 of a transparent body formed to have a thickness of 0.5 mm was tightly adhered to maintain the integrally formed section .

As can be seen from the above examples, the content of each component contained in the panel of the present invention and the external environment physically applied (that is, details such as the heating temperature and the pressing pressure in accordance with the stepwise process The production time and the quality of the product may be changed according to the range of the production time of the product.

First, in the gloss resin composition step (S1), 3 cm 3 of pearl luster powder which holds particles of 0.2 to 1 mm in the PMMA resin fillet is uniformly distributed to form a gloss mixture, ) And the molten resin distribution step (S3) can be easily performed, and the content of the pearl luster powder to be distributed on the luster sheet 11 is determined in advance so that the appearance of the luster sheet 11 becomes important The pearlescent particles are usually made of a metal such as gold, silver, aluminum, titanium, manganese, chromium, and the like. , Magnesium, or a mixture of these particles, depending on the size of the particles, the pearl effect is different. If the pearl particles are too large, it is difficult to evenly distribute the particles. The pearl particles are projected to the outside of the resin and the surface of the glossy sheet is inferior. When the pearl particles are too small, the pearl is remarkably weakened and the pearlescent is not good, so that the particles are kept at a size of 0.2 to 1 mm It can be seen that it is most suitable.

In the resin material input step S2, 500 cm 3 of the ASA resin fillet is introduced into the master extruder 31, and 100 cm 3 of the gloss mixture formed through the gloss resin composition step S 1 is supplied to the plurality of auxiliary extruders 32. . It is a common basic process for injecting raw materials of different components into different extruders. It is preferable to input the respective resin contents according to the content of the product to be produced. Is omitted.

However, in the molten resin distribution step (S3), the ASA resin filler flowing into the main extruder (31) through the resin material feeding step (S2) is heated and maintained at a temperature of 230 to 260 캜, And the gloss mixture flowing into the plurality of auxiliary extruders 32 is heated and maintained at a temperature of 240 to 260 DEG C to melt the gloss resin in the upper portion of the feed block 30. [ And 50 cm.sup.3 at the lower end, respectively, so as to be symmetrically formed. In the step of injecting the raw materials of different components injected through the resin material introduction step (S2) into a desired shape by melting them at a temperature higher than the melting point, Which is a constitution of the feed block 30, in a required ratio.

At this time, the acrylic resin (PMMA - Poly methyl methacrylate) which is the main material of the gloss sheet 10 is a polymer (-) of methylmethacrylate having a melting point of 180 ° C. and a density of 1.19 to 1.20 and a softening point of 100 to 110 ° C., [CH2 = C (CH3) COOCH3] -), which is industrially colorless and transparent, and light, especially ultraviolet light, transmits better than ordinary glass (refractive index 1.49). It has excellent electrical insulation and water resistance and is excellent in durability, denture, eye, jewelry, watch glass, etc. in window frames, optical lenses, Is used.

As described above, acryl is generally low in softening point, excellent in durability and good in moldability, and is formed of any one or combination of vinyl chloride, polystyrene or polypropylene which is harmless to the human body and easily formed into a required shape and shape, Which can maintain the color and properties of the resin sheet of the material as it is, while being excellent in bonding property, it is easy to produce without the mixing operation of chemical substances harmful to human body for bonding as a main constituent of the finished panel, By using the binder as a binder, the binder softens and maintains the gel shape even when the temperature rises above the softening point, at which the binder can be formed, so that a single production material can be easily formed.

The plastic resin (ASA-Acrylic Styrene Acrylonitrile), which is the main material of the built-in panel 10 according to the present invention, has a melting point of 200 to 230 DEG C, a specific gravity of 1.07 and a shrinkage ratio of 3.2 to 0.4 to 0.7 Styrene-acrylonitrile-butadiene copolymer having an excellent weather resistance and excellent impact resistance as well as a high drying rate at a low temperature of 80 to 90 ° C for 2 to 3 hours by lowering the moisture content to 0.01% As an acrylonitrile resin, it is an opacifier which can be maintained in various colors in industry. It has physical properties of general ABS and has excellent weatherability, so that it maintains its stable physical properties over the long term. Instead of butadiene, acrylic rubber is used that has no double bonds. It has a molecular structure that is hard to cause weathering deterioration, The

That is, the durability and weather resistance of the bathtub panel are determined according to the components of the built-in panel 10 as described above, and the overall color of the panel for bathtub is determined. Therefore, the productivity is improved by using the ASA resin as in the present invention, It is possible to constitute a bathtub panel which can maintain the quality of the interior panel 10. It is understood that the step of forming the glossy sheet 11 having high hardness while maintaining the pearl gloss which is tightly bonded to both surfaces of the built- .

As described above, when the ASA molten resin and the melt gloss resin retaining the respective characteristics are injected into the feed block 30, the ASA molten resin flowing into the main extruder 31 is supplied to the central portion of the feed block 30 at 500 (S3) for injecting the gloss mixture introduced into the plurality of auxiliary extruders (32) into the upper and the lower end of the feed block (30) The ASA molten resin flowing into the central portion of the feed block 30 through the distribution step S3 is applied to the upper and lower surfaces of both sides of the built-in panel 10 maintaining a thickness of 10 mm, and the gloss mixture introduced into both sides of the lower end portions of the feed block 30, (S4) for forming the base panel (1b) by discharging the base panel (1b) maintaining the thickness of 12 mm from the feed block (30) while the glossy sheet (11) And the materials of different components are sequentially And the feed block 30, which is a conventionally known device that keeps each of the other components as it is.

In addition, the base panel forming step S4 is a step of forming the ASA melted resin held in the central portion of the feed block 30, which maintains a width of 800 mm through the molten resin distribution step S3, 10 on both upper and lower surfaces of the feed block 30. And a base panel 1b having a cross section maintaining a thickness of 12 mm and a width of 800 mm in a state in which the gloss sheet 11 to be discharged is closely adhered so as to maintain a thickness of 1 mm in the molten luster resin retained on both sides of the lower end.

That is, different liquid or gel-like compositions melted and held at a high temperature are fed into the feed block 30 by the pressure of each of the main extruder 31 and the auxiliary extruder 32, And they are discharged in the form of a discharge port of the feed block 30 while maintaining the components contained therein according to the position of the coupling. In the present invention, The thickness and the width of 800 mm, and the detailed description will be omitted by the conventional known constitution and method which can mechanically set not only the inflow amount to be introduced but also the discharge amount to be discharged.

The forming panel pressing step S5 is a step of pressing the base panel 1b to be discharged to the outlet of the feed block 30 through the base panel forming step S4 into the entrance roller 21 and the advancing roller 22, Are sequentially pressed through a plurality of pressing rollers (20) such as a guide roller (23) and a guide roller (24) to keep the built-in panel (10) made of ASA resin at a thickness of 5 mm, This is a step of forming the molded panel 1a by keeping the thickness of the gloss sheet 11 to be maintained at 0.5 mm and pressing the same with a length of 1000 mm and a continuous length while maintaining the thickness of 6 mm.

That is, as shown in FIG. 2, the base panel 1b, which is discharged through the outlet of the feed block 30, has a thickness of about 12 mm and a thickness of 800 mm in one embodiment of the present invention, Since the sheet material is maintained at a temperature of 120 ° C or higher while maintaining a wide area, it is softened and is not hardened. Therefore, the sheet material is seated on the entrance roller 21 in a state of high bending and bending, The recording sheet P enters the gap between the entrance roller 21 and the adjacent advancing roller 22 by the rotation of the entrance roller 21 and enters between adjacent forming rollers 23 by the rotational force of the advancing roller 22, And the upper part of the shaping roller 23 is conveyed to form a molding panel 6a having a thickness of 6 mm and a width of 1000 mm.

The guide roller 24 is formed in the upper end discharge direction of the shaping roller 23 so that the shaping panel 1a can be easily moved to the conveying roller 60 for conveying the daughter molding panel 1a if necessary, As shown in Fig.

At this time, the entry roller 21 is a roller on which the base panel 1b to be discharged from the feed block 30 is first placed, and the temperature of its surface is maintained at about 65 DEG C, The lower end portion of the base panel 1b discharged from the feed block 30 is prevented from being adhered to the surface of the entrance roller 21 while preventing the base panel 1b from being hardened rapidly when it is seated on the surface And then moves the base panel 1b by rotating it in a direction to be discharged in the direction in which the top surface of the entrance roller 21 is positioned. The base panel 1b is moved between the roller 22 and the entry roller 21 so that the base panel 1b is moved by the rotational force of the advancing roller 22 and at the same time, The forming roller 23, which keeps the surface temperature, So that the thickness of the base panel 1b advancing between the advancing roller 22 and the shaping roller 23 is narrowed by adjusting the distance between the advancing roller 22 and the shaping roller 23. Thus, S5) is performed.

By forming the surface temperature of the pressing roller 20 in the direction as described above to be high, it is possible to improve the flow of the base panel 1b while advancing the flow of the base panel 1b by applying a physical foundation in which the object moves from a mild temperature to a high temperature And the temperature of the base panel 1b exposed to the outside is lowered.

In the post-processing step S6, the forming panel 1a holding the pearl luster on both sides of the sheet is held on the conveying roller 60 by maintaining a constant thickness of 6 mm and a width of 1000 mm through the molding panel pressing step S5 A molding panel cooling step of injecting air into the surface treatment tool 40 on the surface of the molding panel 1a to cool the surface of the molding panel 1a during a long process, a cutting step of cutting the hardened molding panel to a length of 2000 mm, 1) and a drying step for drying for a certain period of time, the post-treatment step S6 is a well-known technique for forming a panel made of a common resin material, and a detailed description thereof will be omitted.

When the panel for a pearlishing bath is produced by the above-described manufacturing method, the interior panel 10 is made of ASA resin in the post-processing step, so that discoloration and deterioration in physical properties The surface of the topsheet, which is capable of rapidly proceeding the drying time of the bath panel 1, which maintains high weatherability and which is hard to cause weathering deterioration which is fundamentally prevented from occurring, at a low temperature and which contains pearl luster on both surfaces of the built- It is possible to shorten the production time and to improve the productivity and reduce the production cost at the same time.

An opaque built-in panel 10 made of ASA resin having a thickness of 5 mm is formed on the glossy sheet 11 for bath produced through the above-described method of producing a glossy sheet for bath, 3% by weight of pearl luster powder of 0.2 to 1 lbs. Of particles was uniformly dispersed in 97% by weight of PMMA resin, and a transparent surface sheet formed to have a thickness of 0.5 mm was closely adhered to both surfaces of the surface pearlishing bath Thereby producing a panel.

5, when the bathtub 100 is formed in the form of a pearlishing bathtub panel as shown in FIG. 5, both surfaces of the bathtub 100 are maintained in a pearl luster owing to the glossy resin, In addition, it keeps both surfaces smooth and beautifully polished while preventing the deformation in use. In addition, it can produce bathtub panels which are not bent or bent arbitrarily even when exposed to water for a long time at a low cost, And so on.

At this time, the bathtub panel manufactured and configured as described above can be applied to the entire life industry such as an electronic product or a wall of a building, as well as producing a bathtub, as one embodiment of the present invention, It is a huge inventor because there are so many uses of it.

S1: Composition of glossy resin S2: Feed of resin material
S3: Molten resin distribution step S4: Foundation panel forming step
S5: Pressing the molding panel S6: Post-processing step
1: Bathtub panel 1a: Molded panel
1b: foundation panel 10: built-in panel
11: gloss sheet 20: pressure roller
21: entry roller 22: advancing roller
23: forming roller 24: guide roller
30: Feed block 31: Main extruder
32: Auxiliary extruder 40: Air nozzle
50: cutting blade 60: conveying roller
100: Bathtub

Claims (2)

A polish resin composition step (S1) comprising 95 to 98% by weight of PMMA resin fillet and 2 to 5% by weight of pearl luster powder which maintains particles of 0.2 to 1 psi and evenly distributing to form a gloss mixture;
(S2) of injecting the ASA resin fillet into the main extruder (31), and separately injecting the gloss mixture formed through the gloss resin composition step (S1) into the plurality of auxiliary extruders (32);
The ASA resin filler flowing into the main extruder 31 through the resin material feeding step S2 is heated and maintained at a temperature of 230 to 260 DEG C so that the ASA molten resin is fed to the central portion of the feed block 30 in an amount of 80 to 90% At the same time, the gloss glossy resin flowing into the plurality of auxiliary extruders 32 heated and maintained at a temperature of 240 to 260 ° C is supplied to the upper and lower ends of the feed block 30 at 5 to 10 volume% A molten resin distribution step (S3) of injecting the molten resin so as to be symmetrical;
(30) on the upper and lower surfaces of both sides of the built-in panel (10) for discharging the ASA molten resin held in the central portion of the feed block (30) through the molten resin distribution step (S3) (S4) for forming a base panel (1b) having a cross section for maintaining a state in which the gloss sheet (11) discharging to maintain the thickness of 5 to 10% of the molten luster resin retained on both sides of the lower end, Wow;
The base panel 1b discharged through the base panel molding step S4 is guided through the plurality of pressing rollers 20 and the upper and lower surfaces of both sides of the built-in panel 10 maintaining a thickness of 80 to 90% A molding panel pressing step (S5) of forming a forming panel (1a) by pressing with a length of 800 mm to 1800 mm and a continuous length with the gloss sheet (11) holding the thickness of 5 to 10% in close contact, To a method for manufacturing a panel for a highly weatherproof bathtub which maintains a pearl luster 2 to 5% by weight of a pearlescent powder with a particle size of 0.2 to 1 kPa is added to 95 to 98% by weight of PMMA resin on both surfaces of an opaque built-in panel 10 made of ASA resin which maintains a thickness of 80 to 90% And the surface sheet of the transparent body is uniformly distributed in a thickness of 5 to 10%, respectively, so as to maintain the integrally formed cross-section.

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