Manufacturing method for mother-of-pearl lacquerware for different materials and products thereof

Abstract

The present invention is as follows. An intaglio groove forming step of forming an intaglio groove corresponding to a mother-of-pearl pattern on the surface of a substrate made of any one selected from stainless steel, bronze, aluminum, titanium, and synthetic resin; Filler placement step 1, in which a filler comprising mother-of-pearl material and adhesive resin is placed inside the above-mentioned engraved groove; A hydraulic compression step of applying pressure to the filler in the direction of the substrate using a hydraulic press to ensure close contact; and The present invention relates to a method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates using a hydraulic pressure control and embedding structure, comprising: a first polishing step of polishing so that the surface of the substrate and the mother-of-pearl material form a single plane after curing the above-mentioned filler.

Description

Technology Field

[0001] The present invention relates to metal and synthetic resin craft technology, and more specifically, to a manufacturing method for precisely and firmly bonding mother-of-pearl to metal substrates such as stainless steel, bangjja bronze, aluminum, and titanium, and synthetic resin substrates by applying the mother-of-pearl inlay technique.

[0002] More specifically, the invention relates to a hybrid mother-of-pearl lacquerware manufacturing technology that simultaneously achieves the functionality and durability of modern metal and synthetic resin materials while maintaining the aesthetics of traditional mother-of-pearl lacquerware by forming an intaglio embedded structure on the surface of a substrate and utilizing a hydraulic pressure control system to maximize the physical and chemical bonding force between the mother-of-pearl and the substrate. Background Technology

[0003] In Drawing 6, which shows the patent number 10-0723951 registered with the Intellectual Property Office of the Republic of Korea, the spoon (10) has a bowl (11) formed to hold food and a handle (15) that extends in length from one side of the bowl (11) and can be gripped.

[0004] Meanwhile, in one area of ​​the handle (15), a receiving groove (31) in which mother-of-pearl (37) is decorated is formed by being sunk to a predetermined depth from the plate surface of the handle (15).

[0005] An adhesive (35) for attaching mother-of-pearl (37) is applied to the upper part of the coloring layer (33).

[0006] On the upper part of the adhesive (35), mother-of-pearl (37) is laminated and adhered to the receiving groove (31) by the adhesive (35). The mother-of-pearl (37) is composed of a thin sheet of a certain area made of various shells such as conch, abalone, and pearl oyster, and has a predetermined pattern.

[0007] A transparent surface finishing material (39) is coated on the upper surface of the mother-of-pearl (37) that is received and bonded in the receiving groove (31) and on the space area of ​​the receiving groove (31). Accordingly, the transparent surface finishing material (39) prevents the mother-of-pearl (37) from detaching from or being damaged in the receiving groove (31).

[0008] Traditional mother-of-pearl lacquerware uses a method of attaching mother-of-pearl to a wooden substrate using lacquer. However, when this method is applied to substrates such as metal or synthetic resin, there is a chronic problem where the mother-of-pearl easily peels off due to the smooth surface of the substrate. Additionally, metal and synthetic resin have different thermal expansion rates than mother-of-pearl, which can cause warping over time, and since the entire process is performed by hand, there are limitations to quality standardization and mass production.

[0009] Najeonchilgi is a traditional craft technique that involves inlaying mother-of-pearl onto the surface of a substrate for decoration. Due to the unique iridescent luster and delicate pattern expression of mother-of-pearl, it has long been utilized in the production of high-end crafts. Traditionally, Najeonchilgi uses wood as a substrate and is produced by repeatedly applying natural lacquer as both an adhesive and a protective layer. However, in the modern industrial environment, the need to apply the Najeon technique to metal and synthetic resin substrates is increasing due to demands for durability, hygiene, and mass production.

[0010] Metal substrates, particularly stainless steel and aluminum, are widely used in kitchenware, tableware, and architectural interior materials due to their excellent corrosion resistance and hygiene, while synthetic resin substrates are widely adopted for household goods and home appliance exteriors due to their lightweight nature and high moldability. If traditional mother-of-pearl inlay techniques can be combined with these modern materials, it is possible to create high-value-added products that possess both cultural value and practicality.

[0011] However, there are fundamental limitations to applying conventional mother-of-pearl lacquerware manufacturing methods directly to metal or synthetic resin substrates.

[0012] First, unlike wood, metals and synthetic resins have smooth and dense surfaces with almost no micropores for adhesives to physically penetrate. Consequently, it is difficult to secure sufficient bonding strength by simply attaching mother-of-pearl to the substrate surface, and there is a problem where the mother-of-pearl easily peels off due to external impact or repeated use. In particular, there is a risk that the mother-of-pearl may detach due to weakened adhesive interfaces in high-temperature and high-humidity environments, such as dishwashers, or during the frequent washing of kitchenware.

[0013] Second, metals and synthetic resins have significantly different coefficients of thermal expansion compared to mother-of-pearl (main component: calcium carbonate). For example, the coefficient of thermal expansion of stainless steel is approximately 17 × 10⁻⁶. 6 While / K, mother-of-pearl is approximately 8×10 6 At the / K level, differential deformation occurs between the substrate and the mother-of-pearl upon temperature change. This thermal expansion mismatch has limitations, as it accumulates shear stress at the adhesive interface under repetitive temperature cycles, causing delamination or, in severe cases, generating microcracks in the mother-of-pearl itself.

[0014] Third, the traditional lacquer-based bonding method requires a long time for natural drying (typically over 24 hours) and necessitates the repeated application of lacquer 7 to 9 times, resulting in a total production period of several weeks. Furthermore, as all processes rely on the manual labor of skilled artisans, there is significant quality variation among products, and establishing a mass production system is difficult. This acts as a serious constraint on the industrial expansion and entry into the global market of mother-of-pearl lacquerware.

[0015] Fourth, some conventional adhesive methods for metal substrates have primarily used two-component epoxy resins or urethane resins; however, these methods have limitations, such as requiring the main component and the hardener to be mixed in precise proportions and used within two hours of mixing. If the mixing ratio is inaccurate or the pot life is exceeded, curing failure occurs, leading to a rapid decrease in adhesive strength. Furthermore, unused residues must be discarded, resulting in a high rate of material loss, and issues regarding deterioration of the working environment and environmental pollution due to the volatilization of hardener components have also been raised.

[0016] Fifth, there are technical difficulties in effectively reproducing the unique pearlescent luster of mother-of-pearl on a metal substrate. In the case of a wooden substrate, the lacquer layer forms a dark background beneath the mother-of-pearl to enhance optical contrast, but since the metal substrate has a metallic luster of its own, the delicate iridescent diffuse reflection effect of the mother-of-pearl is offset, resulting in a limitation in visual clarity.

[0017] Due to these complex technical limitations, products applying the mother-of-pearl inlay technique to metal and synthetic resin substrates have not yet reached commercial practical application because of issues such as insufficient durability and reduced productivity. Therefore, there is an urgent need to develop an innovative manufacturing method that considers the physical properties of metal and synthetic resin substrates while ensuring a robust bond with mother-of-pearl, enabling mass production, and maximizing the inherent aesthetic qualities of the material.

[0018] Traditional mother-of-pearl lacquerware involves attaching mother-of-pearl to a wooden substrate using lacquer, and since all processes are performed manually, there were limitations in mass production and quality standardization. In particular, when applied to heterogeneous substrates such as metal or synthetic resin, a chronic problem occurred where the mother-of-pearl easily peeled off due to the smooth surface of the substrate. Furthermore, because the thermal expansion rates of metal and synthetic resin differ from those of mother-of-pearl, warping could occur over time. Additionally, when using conventional two-component epoxy or urethane adhesives, there was the inconvenience of having to mix the main component and the hardener in the correct ratio. Economic losses occurred due to the need to discard leftovers because the workable time (pot life) was limited to use within two hours of mixing, and productivity was extremely low as it took 24 hours for room temperature curing.

[0019] The two-component epoxy used so far has a pot life limitation, requiring the entire amount to be used within two hours of mixing the main component and the hardener, which necessitates the disposal of any remaining material. In contrast, the one-component resin of the present invention can be stored for more than 365 days when stored in a sealed container, allowing for near-zero material loss. Third, while the two-component epoxy takes 24 hours to cure at room temperature, the one-component polyester resin of the present invention fully cures in 20 to 30 minutes at 150°C, thereby reducing the production lead time by more than 95%. Fourth, while the two-component epoxy emits a large amount of volatile organic compounds (VOCs) from the hardener, the resin of the present invention is cured in a sealed thermal curing furnace, which can reduce VOC emissions by more than 70%.

[0020] The present invention was invented under the background described above. Prior art literature

[0021] Ministry of Intellectual Property and Property of the Republic of Korea Registered Patent No. 10-0723951 (May 31, 2007) Ministry of Intellectual Property and Property of the Republic of Korea Published Patent Application 10-2012-0027706 (March 22, 2012) Ministry of Intellectual Property and Property of the Republic of Korea Published Patent Application 10-2013-0096506 (August 30, 2013) The problem to be solved

[0022] The first problem that the invention aims to solve is to provide a method for manufacturing a mother-of-pearl lacquerware product capable of precisely and firmly bonding mother-of-pearl to metal substrates and low-hardness substrates including stainless steel, glass, wood, ceramics, bronze ware, aluminum, titanium, and synthetic resins.

[0023] The second problem that the invention aims to solve is to maximize the anchoring bonding force between dissimilar materials through a structure that forms engraved grooves on the surface of a substrate and embeds mother-of-pearl.

[0024] The third problem that the invention aims to solve is to achieve uniform adhesion and eliminate internal residual bubbles through precision pressure control tailored to the substrate using a hydraulic machine.

[0025] The fourth problem that the invention aims to solve is to improve productivity and maximize adhesive strength through the optimal combination of polyester-based resin and pearl pigment and a two-stage heat-curing process. means of solving the problem

[0026] To solve the above-mentioned problem, the following method is used.

[0027] The first embodiment is as follows.

[0028] An intaglio groove forming step of forming an intaglio groove corresponding to a mother-of-pearl pattern on the surface of a substrate made of any one selected from stainless steel, bronze, aluminum, titanium, and synthetic resin;

[0029] Filler placement step 1, in which a filler comprising mother-of-pearl material and adhesive resin is placed inside the above-mentioned engraved groove;

[0030] A hydraulic compression step of applying pressure to the filler in the direction of the substrate using a hydraulic press to ensure close contact; and

[0031] The method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates using a hydraulic pressure control and embedding structure includes: a first polishing step of polishing so that the surface of the substrate and the mother-of-pearl material form a single plane after curing the above-mentioned filler.

[0032] Here, if the mother-of-pearl material is plate-shaped mother-of-pearl, the depth of the engraved groove is configured to be 0.3mm to 0.5mm, and the applied pressure of the hydraulic compression step is 5 to 15kgf / cm² to prevent damage to the mother-of-pearl. 2 It is desirable to include controlling it.

[0033] The second embodiment is as follows.

[0034] An intaglio groove forming step of forming an intaglio groove corresponding to a mother-of-pearl pattern on the surface of a substrate made of any one selected from stainless steel, bronze, aluminum, titanium, and synthetic resin;

[0035] Filler placement step 2, in which a filler, which is an adhesive resin, is placed inside the above-mentioned intaglio groove;

[0036] A hydraulic compression step of applying pressure to the filler in the direction of the substrate using a hydraulic press to ensure close contact; and

[0037] The method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates using a hydraulic pressure control and embedded structure comprises: a second polishing step of polishing the surface of the substrate and the cured adhesive resin after curing the above filler, so as to form a plane with the surface of the substrate and the cured adhesive resin.

[0038] This applies to both the first and second embodiments.

[0039] Here, it is preferable to further include a surface roughness forming step after the intaglio groove forming step of forming the intaglio groove, wherein the bottom surface of the intaglio groove is sandblasted to form a surface roughness (Ra), thereby generating an anchoring effect with the adhesive resin.

[0040] Here, it is preferable that the adhesive resin comprises mixing a pearl pigment into a polyester resin composition.

[0041] Here, it is preferable that the powder of the pearl pigment has a particle size of 150 to 250 mesh.

[0042] Here, the depth of the engraved groove is formed to be 0.3 mm to 1 mm, and the pressure in the hydraulic compression step is 30 to 70 kgf / cm² for the upper discharge of internal bubbles. 2 It is desirable to include controlling it.

[0043] Here, it is preferable to further include a step of forming a release layer by placing a fluoropolymer (PTFE) film on the upper part of the filler during the hydraulic compression step to prevent adhesion with the press mold, and to perform a dwell time process in which the pressurized state of the hydraulic compression is maintained for 30 to 180 seconds to induce the resin to penetrate into the fine irregularities of the intaglio groove.

[0044] Here, the hydraulic compression step differentially controls the applied pressure according to the material and hardness of the substrate, wherein if the substrate is stainless steel, the pressure is 40 to 70 kgf / cm² 2 , in the case of Bangjja bronze ware, 20 to 30 kgf / cm 2 , in the case of aluminum, 10 to 20 kgf / cm² 2 , in the case of synthetic resin, 5 to 10 kgf / cm 2 It is desirable to include applying pressure.

[0045] Here, the adhesive resin is prepared by mixing a pearl pigment with a polyester resin composition to form a mixed paste, wherein the polyester resin composition comprises 56 parts by weight of polyester, 10 parts by weight of thinner, 2 parts by weight of plasticizer (DOP), 1 part by weight of leveling agent, 1 part by weight of anti-foaming agent, and 30 parts by weight of retardant, and preferably comprises 7 to 8 parts by weight of pearl pigment mixed with 100% by weight of the polyester resin composition.

[0046] Herein, the curing step performed after the hydraulic compression step comprises: a primary low-temperature drying step that suppresses bubble generation and stabilizes the resin; and

[0047] It is preferable to include a second main drying step in which the substrate and the filler are integrated at a high temperature after the first low-temperature drying step.

[0048] Here, it is preferable to include a hydraulic pressure control and embedding structure characterized in that the surface of the above-mentioned material includes a flat or curved surface, and the intaglio groove is formed on the outer surface of a bottle, container, or curved structure.

[0049] Here, it is preferable that the adhesive resin comprises a transparent polyester resin and enhances the color expression of the mother-of-pearl by increasing the diffuse reflection of light generated from the mother-of-pearl material.

[0050] Here, the adhesive resin further comprises mother-of-pearl powder, and it is preferable that the content of the mother-of-pearl powder be 3 to 10 weight percent relative to the total weight of the adhesive resin.

[0051] Here, it is preferable that the hydraulic compression step be performed using a step-pressure method that gradually increases the pressure to prevent damage to the mother-of-pearl material.

[0052] Here, it is preferable that the above-mentioned groove is formed by any one of CNC machining, laser machining, or mold forming processes.

[0053] The third embodiment relates to a product.

[0054] An intaglio groove formed on the surface of the above-mentioned substrate, having a depth of 0.3 mm to 1.0 mm and a bottom surface roughness (Ra) of 1.5 μm to 2.0 μm;

[0055] A mother-of-pearl material embedded within the above-mentioned engraved groove and physically integrated with the above-mentioned substrate; and

[0056] A mother-of-pearl lacquerware product is constructed by comprising an adhesive layer in which 7 to 8 parts by weight of pearl pigment are mixed with 100 parts by weight of a one-component resin composition comprising 56 parts by weight of unsaturated polyester resin, 10 parts by weight of toluene thinner, 2 parts by weight of dioctyl phthalate (DOP), 1 part by weight of leveling agent, 1 part by weight of silicone-based anti-foaming agent (KF-69), and 30 parts by weight of methyl salicylate; wherein the mother-of-pearl material and the surface of the substrate form the same plane, and the adhesive layer is anchored to the fine irregularities on the bottom surface of the incised groove to produce an anchoring effect.

[0057] Here, it is preferable that the adhesive layer comprises 3 to 10 weight percent of mother-of-pearl powder in a transparent polyester resin to increase diffuse reflection of light.

[0058] Here, the surface of the above-mentioned material includes a flat or curved surface, and it is preferable that the intaglio groove is formed on the outer circumference of the curved surface in the shape of a container or bottle.

[0059] Here, it is preferable that a transparent protective coating layer is further formed on the surface of the above-mentioned substrate to protect the mother-of-pearl material and the adhesive layer. Effects of the invention

[0060] The first effect of the invention is to maximize durability by significantly improving peel resistance by more than five times compared to conventional methods by embedding mother-of-pearl in an engraved groove formed on the surface of a substrate and forming a three-dimensional anchoring structure through sandblasting treatment.

[0061] The second effect of the invention is to completely discharge internal bubbles while preventing damage to the mother-of-pearl through precise pressure control tailored to the substrate using a hydraulic press, thereby dramatically improving the bonding area and adhesion.

[0062] The third effect of the invention is that by combining a one-component resin with 7 to 8 parts by weight of optimized pearl pigment, it has a synergistic effect that increases workability while maximizing the unique diffuse reflection aesthetic of mother-of-pearl and increasing adhesive strength.

[0063] The fourth effect of the invention is to achieve innovative productivity capable of commercial mass production by significantly shortening the curing time while suppressing bubble generation through a two-stage thermal curing system consisting of a first low-temperature setting and a second high-temperature main curing. Brief explanation of the drawing

[0064] FIG. 1 is a figure showing the application of the present invention to a hammered brass spoon. Fig. 2 is a diagram showing another mother-of-pearl pattern of a Bangjja spoon. FIG. 3 is a figure showing the application of the present invention to stainless steel. Figure 4 is a diagram showing engraved grooves formed on the surface of the substrate before applying the mother-of-pearl pattern. FIG. 5a shows a flowchart of a method for manufacturing mother-of-pearl lacquerware using mother-of-pearl material and adhesive resin on metal and synthetic resin substrates. FIG. 5b shows a flowchart according to a manufacturing method that produces the effect of mother-of-pearl lacquerware by filling grooves in metal and synthetic resin substrates with adhesive resin. Figure 6 is a figure showing background technology. Specific details for implementing the invention

[0065] The explanation based on the drawings is as follows.

[0066] Embodiments of the present invention are described in detail with reference to the drawings. Embodiments according to the concept of the present invention disclosed herein are illustrative for illustrative purposes only and may be implemented in various forms and are not limited to the described embodiments. A system for manufacturing mother-of-pearl lacquerware based on metal and synthetic resin substrates according to the present invention may be configured to include an intaglio groove forming module, a surface roughness forming module, a resin composition module, a hydraulic compression module, a heat curing module, and a polishing module.

[0067] Method for manufacturing a mother-of-pearl lacquerware product according to the first embodiment

[0068] As illustrated in Fig. 5a, the manufacturing method using plate-shaped mother-of-pearl or mother-of-pearl powder proceeds as follows.

[0069] The intaglio groove formation step (S100) has the following method.

[0070] Intaglio grooves of a depth corresponding to a mother-of-pearl pattern are formed on the surface of a substrate selected from stainless steel, glass, wood, ceramics, bronze ware, aluminum, titanium, and synthetic resin using an engraving device.

[0071] In the case of plate-shaped mother-of-pearl, it is processed to a depth of 0.3 mm to 0.5 mm, and when filling with mother-of-pearl powder mixture, it is processed to a depth of 0.5 mm to 1.0 mm to secure bonding strength and polishing margin.

[0072] The surface roughness formation step (S200) is as follows.

[0073] After forming the engraved groove, the bottom surface is sandblasted to form a surface roughness (Ra) of 1.5 μm to 2.0 μm.

[0074] This process is a pretreatment process that increases the contact area by more than 300% compared to the smooth surface and allows the resin to penetrate into the micro-irregularities to produce an anchoring effect.

[0075] The first step of adhesive resin preparation and filler placement (S300) has the following process.

[0076] An adhesive resin is prepared by mixing 7 to 8 parts by weight of pearl pigment with a particle size of 150 to 250 mesh with 100 parts by weight of a one-component resin composition comprising 56 parts by weight of unsaturated polyester resin, 10 parts by weight of toluene thinner, 2 parts by weight of plasticizer (DOP), 1 part by weight of surface leveling agent, 1 part by weight of anti-foaming agent, and 30 parts by weight of retardant (methyl salicylate).

[0077] When the ratio of pearl pigment meets this range, the rainbow diffuse reflection effect is maximized and the adhesive strength increases significantly. If the amount of pigment is 6 weight% or less, clarity decreases, and if it is 9 weight% or more, cracks occur during post-processing.

[0078] A filler containing plate-shaped mother-of-pearl and the adhesive resin is placed inside the engraved groove. In the case of powder paste, the engraved groove is overfilled at a ratio of 110% to account for volume reduction due to internal air bubble discharge.

[0079] The step of forming the mold layer (S350) and the hydraulic compression step (S400) are as follows.

[0080] A fluoropolymer (PTFE) film is placed on top of the filler to form a release layer that prevents adhesion with the press mold.

[0081] Using a hydraulic press, the filler is pressed in the direction of the substrate to ensure close contact.

[0082] The applied pressure is controlled differentially according to the material and hardness of the substrate. Pressures of 40 to 70 kgf / cm² are applied to stainless steel, 20 to 30 kgf / cm² to Bangjja bronze, 10 to 20 kgf / cm² to aluminum, and 5 to 10 kgf / cm² to synthetic resin to prevent breakage.

[0083] A dwell time process is performed by maintaining the pressurized state for 30 to 180 seconds to induce the resin to completely penetrate into the micro-irregularities of the intaglio groove, thereby discharging internal bubbles.

[0084] The curing step (S500) has the following process.

[0085] In order to suppress bubble generation and stabilize the resin through the first low-temperature drying step (S510), it is slowly cured at a low temperature of 40°C for 30 minutes.

[0086] Afterwards, through a second main drying step (S520), the substrate and the filler are completely integrated by drying at a high temperature of 150°C for 20 to 30 minutes. If the temperature exceeds 150°C, the adhesive strength may be weakened or yellowing may occur due to the difference in expansion coefficients.

[0087] The first polishing step (S600) has the following process.

[0088] After heat curing is complete, the surface of the above substrate and the above mother-of-pearl material are flattened so that they form a single plane.

[0089] Remove unevenness using sandpaper from #400 to #3000 in sequence, then polish with diamond paste.

[0090] The method for manufacturing a mother-of-pearl lacquerware product according to the second embodiment is as follows.

[0091] As shown in Fig. 5b, the method of filling only the adhesive resin excluding the plate box mother-of-pearl material proceeds as follows.

[0092] The intaglio groove forming step (S100) and the surface roughness forming step (S200) are performed in the same manner as in the first embodiment described above.

[0093] In the second step of filler placement (S330), only adhesive resin is placed as a filler inside the aforementioned intaglio groove.

[0094] After undergoing the same hydraulic compression step (S400) and curing step (S500), the surface of the substrate and the cured adhesive resin are polished in a second polishing step (S650) so that they form a plane. Even if the mother-of-pearl is omitted, brilliant visibility can be secured through the diffuse reflection of pearls within the adhesive resin.

[0095] The structure and physical properties of mother-of-pearl lacquerware products are as follows.

[0096] The product completed by the above manufacturing method has an inlay structure in which the mother-of-pearl is embedded rather than protruding.

[0097] An intaglio groove is formed on the surface of the substrate with a depth of 0.3 mm to 1.0 mm and a bottom surface roughness (Ra) of 1.5 μm to 2.0 μm.

[0098] It includes a mother-of-pearl material embedded within the above-mentioned engraved groove and physically integrated with the substrate.

[0099] It comprises an adhesive layer in which 7 to 8 parts by weight of pearl pigment are mixed with 100 parts by weight of a one-component resin composition comprising 56 parts by weight of unsaturated polyester resin, 10 parts by weight of toluene thinner, 2 parts by weight of dioctyl phthalate (DOP), 1 part by weight of leveling agent, 1 part by weight of silicone-based anti-foaming agent (KF-69), and 30 parts by weight of methyl salicylate.

[0100] The surface of the mother-of-pearl material and the substrate form a single plane, and the adhesive layer is anchored to the fine irregularities on the bottom surface of the engraved groove to produce an anchoring effect.

[0101] Through this structure, a peel strength of 28 to 32 MPa is secured, achieving excellent mechanical strength that prevents detachment or cracking even in dishwashers or high-temperature environments.

[0102] The ceramic application embodiments are as follows.

[0103] The present invention can also be applied to ceramics.

[0104] In the case of ceramics, a mold is used during the initial molding stage to pre-form reliefs corresponding to the mother-of-pearl pattern.

[0105] Afterwards, mother-of-pearl and resin are filled into the corresponding area to form an embedded structure.

[0106] Through this method, it is possible to mass-produce mother-of-pearl ceramic products, which were difficult to commercialize due to low workability in conventional technology.

[0107] The workability of the present invention is as follows.

[0108] In the background technology, the wood did not have the pattern attached by adhesive force, but rather held in place by a coating film through 5 to 8 coatings.

[0109] Furthermore, even when attached with adhesive, the glue would seep out or get on the sides, requiring various troublesome processes to remove it.

[0110] For this reason, attaching mother-of-pearl to wood was very low in productivity.

[0111] However, in the present invention, the bonding agent is applied by engraving, but the bonding agent actually helps the mother-of-pearl to reflect light more effectively, and the adhesive strength is further enhanced by the mother-of-pearl powder, thereby eliminating the need for the time and process of coating and the work of removing the bonding agent. Therefore, the productivity of the present invention has been significantly increased.

[0112] The present invention can also be applied to glass.

[0113] In the background technology, it could not be used on glass at all.

[0114] Because the glue / adhesive became transparent and actually had a counterproductive effect on the dazzling patterns of the mother-of-pearl, it was impossible to attach the mother-of-pearl to the glass.

[0115] However, the color of the binder of the present invention is not only transparent, but also, by adding 7-8% by weight of mother-of-pearl powder to the polyester resin and using it as a binder, the binder causes diffuse reflection, thereby producing a more brilliant color.

[0116] Glass also has uneven surfaces created in advance using a mold. In other words, the shape of the pattern is formed using a mold.

[0117] The invention is suitable for attaching and coating by mixing the aforementioned components into a polyester resin, and mixing 7 to 8 weight percent of mother-of-pearl powder.

[0118] If not applied to the wood, mold will grow.

[0119] As for wood, productivity was low because it was lacquered using background technology.

[0120] The present invention is composed of a coating solution that enhances adhesion and makes the color of the mother-of-pearl more vivid.

[0121] Since wood absorbs light, the brilliance or unique colors were diminished when mother-of-pearl was applied to wood.

[0122] The present invention achieves vibrant colors by reinforcing with a coating liquid adhesive.

[0123] The present invention can also provide positive effects from an environmental perspective. Conventional two-component epoxy resins emitted large amounts of volatile organic compounds (VOCs) from the curing agent, whereas the one-component polyester resin of the present invention is cured in a closed-type thermal curing furnace, which can reduce VOC emissions by more than 70%. In addition, waste generation can be minimized due to zero material loss, which can be understood as an eco-friendly manufacturing process.

[0124] Embodiments according to the concept of the present invention may be subject to various modifications and may take various forms, so specific embodiments are illustrated in the drawings and described in detail in this specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. Explanation of the symbols

[0125] 100: Entry 110: Engraved groove

Claims

Claim 1 An intaglio groove forming step of forming an intaglio groove corresponding to a mother-of-pearl pattern on the surface of a substrate made of any one selected from stainless steel, glass, wood, ceramics, bronze ware, aluminum, titanium, and synthetic resin; a surface roughness forming step of forming a surface roughness (Ra) by sandblasting the bottom surface of the intaglio groove to generate an anchoring effect with an adhesive resin; a mother-of-pearl material and the above A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized by comprising a hydraulic pressure control and embedding structure, wherein the first step of placing a filler containing an adhesive resin; the first step of placing a filler containing an adhesive resin, wherein the adhesive resin is a mixture of pearl pigment in a polyester resin composition, wherein the adhesive resin further includes mother-of-pearl powder, and the filler is pressed and adhered in the direction of the substrate using a hydraulic press; and the first step of differentially controlling the applied pressure according to the material and hardness of the substrate in the hydraulic pressing step, wherein the curing step performed after the hydraulic pressing step comprises: a first low-temperature drying step for suppressing bubble generation and stabilizing the resin; a second main drying step for integrating the substrate and the filler at a high temperature after the first low-temperature drying step; and a first step of polishing for polishing so that the surface of the substrate and the mother-of-pearl material form a same plane after curing the filler. Claim 2 In claim 1, when the mother-of-pearl material is plate-shaped mother-of-pearl, the depth of the engraved groove is configured to be 0.3mm to 0.5mm, and the applied pressure of the hydraulic compression step is 5 to 15kgf / cm² to prevent damage to the mother-of-pearl. 2 A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized by including hydraulic pressure control and a buried structure, including controlling by Claim 3 An engraved groove forming step of forming an engraved groove corresponding to a mother-of-pearl pattern on the surface of a substrate made of any one selected from stainless steel, glass, wood, ceramics, Bangjja bronze, aluminum, titanium, and synthetic resin; a surface roughness forming step of forming a surface roughness (Ra) by sandblasting the bottom surface of the engraved groove to generate an anchoring effect with the adhesive resin; a filler placement step 2 of placing a filler, which is the adhesive resin, inside the engraved groove; a hydraulic compression step in which the adhesive resin is a mixture of pearl pigment in a polyester resin composition, wherein the adhesive resin further includes mother-of-pearl powder, and the filler is pressed and adhered in the direction of the substrate using a hydraulic press; wherein the applied pressure in the hydraulic compression step is differentially controlled according to the material and hardness of the substrate, and the curing step performed after the hydraulic compression step is a first low-temperature drying step that suppresses bubble generation and stabilizes the resin; A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized by including a hydraulic pressure control and embedding structure comprising: a second main drying step of integrating the substrate and the filler at a high temperature after the first low-temperature drying step; and a second polishing step of polishing so that the surface of the substrate and the cured adhesive resin form a same plane after curing the filler. Claim 4 A method for manufacturing a mother-of-pearl lacquerware product for a heterogeneous substrate, characterized in that, in the surface roughness forming step of claim 1 or 3, the bottom surface of the intaglio groove is formed such that the surface roughness (Ra) is 1.5 μm to 2.0 μm. Claim 5 A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized in that, in claim 1 or 3, the polyester resin composition is a one-component resin composition comprising an unsaturated polyester resin. Claim 6 A method for manufacturing a mother-of-pearl lacquerware product for a heterogeneous substrate, characterized in that, in claim 1 or 3, the pearl pigment powder comprises a hydraulic pressure control and embedding structure having a particle size of 150 to 250 mesh. Claim 7 In claim 1 or 3, the depth of the engraved groove is formed to be 0.3 mm to 1 mm, and the pressure in the hydraulic compression step is 30 to 70 kgf / cm² for the upper discharge of internal bubbles. 2 A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized by including hydraulic pressure control and a buried structure, including controlling by Claim 8 A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized in that, in claim 1 or 3, during the hydraulic compression step, a release layer forming step is further included in which a fluoropolymer (PTFE) film is placed on the upper surface of the filler to prevent adhesion with the press mold, and a dwell time process is performed to maintain the pressurized state of the hydraulic compression for 30 to 180 seconds to induce the resin to penetrate into the fine irregularities of the intaglio groove. Claim 9 In the case of claim 1 or 3, if the above material is stainless steel, 40 to 70 kgf / cm 2 , in the case of Bangjja bronze ware, 20 to 30 kgf / cm 2 , in the case of aluminum, 10 to 20 kgf / cm² 2 , in the case of synthetic resin, 5 to 10 kgf / cm 2 A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized by including a hydraulic pressure control and a buried structure that includes applying pressure. Claim 10 A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized in that, in claim 5, the one-component resin composition comprises 56 parts by weight of unsaturated polyester resin, 10 parts by weight of toluene thinner, 2 parts by weight of plasticizer (DOP), 1 part by weight of surface leveling agent, 1 part by weight of anti-foaming agent, and 30 parts by weight of methyl salicylate as a retardant, and 7 to 8 parts by weight of pearl pigment are mixed with 100 parts by weight of the one-component resin composition. Claim 11 A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized in that, in claim 1 or 3, the first low-temperature drying step is performed at 40°C for 30 minutes, and the second main drying step is performed at 150°C for 20 to 30 minutes. Claim 12 A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized in that, in claim 1 or 3, the surface of the substrate comprises a flat or curved surface, and the intaglio groove is formed on the outer surface of a bottle, container, or curved structure. Claim 13 A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized in that, in claim 1, the adhesive resin comprises a transparent polyester resin and enhances the color expression of the mother-of-pearl by increasing the diffuse reflection of light generated from the mother-of-pearl material. Claim 14 In paragraph 1 or 3, A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized by including a hydraulic pressure control and embedding structure in which the content of the mother-of-pearl powder is 3 to 10 weight percent relative to the total weight of the adhesive resin. Claim 15 A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized in that, in claim 1 or 3, the hydraulic compression step is performed in a step-pressure method that increases pressure stepwise to prevent damage to the mother-of-pearl material. Claim 16 A method for manufacturing a mother-of-pearl lacquerware product for heterogeneous substrates, characterized in that, in claim 1 or 3, the intaglio groove is formed by any one of CNC machining, laser machining, or mold forming processes. Claim 17 A mother-of-pearl lacquerware product manufactured by the method of manufacturing a mother-of-pearl lacquerware product according to any one of paragraphs 1 to 3. Claim 18 A substrate selected from the group consisting of stainless steel, Bangjja bronze, aluminum, titanium, and synthetic resin; an intaglio groove formed on the surface of the substrate, having a depth of 0.3 mm to 1.0 mm and a bottom surface roughness (Ra) of 1.5 μm to 2.0 μm; and a mother-of-pearl material embedded within the intaglio groove and physically integrated with the substrate. An adhesive layer comprising 7 to 8 parts by weight of pearl pigment mixed with 100 parts by weight of a one-component resin composition comprising 56 parts by weight of unsaturated polyester resin, 10 parts by weight of toluene thinner, 2 parts by weight of dioctyl phthalate (DOP), 1 part by weight of leveling agent, 1 part by weight of silicone-based anti-foaming agent (KF-69), and 30 parts by weight of methyl salicylate; wherein the adhesive layer is placed in the intaglio groove and then penetrates into the micro-irregularities on the bottom surface of the intaglio groove while being pressed in the direction of the substrate by a hydraulic press, and is heat-cured by a first low-temperature drying at 40°C for 30 minutes and a second main drying at 150°C for 20 to 30 minutes to anchor to the micro-irregularities on the bottom surface of the intaglio groove, thereby generating an anchoring effect, wherein the surface of the mother-of-pearl material and the surface of the substrate form a coplanar plane, and the adhesive layer anchors to the micro-irregularities on the bottom surface of the intaglio groove A mother-of-pearl lacquerware product characterized by including a component that generates an anchoring effect. Claim 19 A mother-of-pearl lacquerware product according to claim 18, characterized in that the adhesive layer contains 3 to 10 weight percent of mother-of-pearl powder in a transparent polyester resin to increase diffuse reflection of light. Claim 20 A mother-of-pearl lacquerware product according to claim 18, characterized in that the surface of the above description includes a flat or curved surface, and the above incised groove is formed on the outer circumference of the curved surface in the shape of a container or bottle. Claim 21 A mother-of-pearl lacquerware product according to claim 18, characterized in that the surface of the above description includes a transparent protective coating layer for protecting the mother-of-pearl material and the adhesive layer.

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