Manufacturing method for manicure

Abstract

The invention relates to the technical field of manicure, in particular to a manicure manufacturing method which comprises the following steps: (1) preparing a nutrition repairing layer, (2) preparing a nail fixing layer and (3) preparing a color layer. (4) preparing a sealing layer, wherein the sealing layer is prepared from the following components in parts by weight: 35 to 45 parts of polyurethane acrylate, 25 to 35 parts of bifunctional acrylate, 10 to 15 parts of organic silicon modified acrylate, 1 to 3 parts of nano zirconium oxide, 2 to 4 parts of a photoinitiator, 0.5 to 1 part of an antioxidant and 1 to 2 parts of an anti-ultraviolet agent; and (5) the surface of the nail is sequentially coated with the nutrition repairing layer, the nail fixing layer, the color layer and the sealing layer, UV curing is carried out after coating of each layer, and vitamin E acetate and squalane in the nutrition repairing layer form a microscopic slow release system. The ester group of the vitamin E acetate and the long-chain hydrocarbon structure of the squalane are intertwined with each other to form a carrier structure similar to a sustained-release medicine, so that long-acting and continuous nutrition supply is provided for nails.

Description

Technical Field

[0001] The present invention relates to the technical field of nail art, in particular to a method for making nail art. Background Art

[0002] As a popular beauty method, manicure has gained wide attention and application worldwide in recent years. However, there are many problems with the traditional method of making manicure, which seriously restricts its further development. First of all, conventional manicure products often lack the function of nourishing and protecting the nails themselves. Long-term use may cause the nails to become brittle, dry, and even delaminate. Secondly, the durability of traditional manicure is insufficient, and it is prone to fading, cracking or falling off, which affects the durability of the aesthetic effect. Furthermore, the nail products in the prior art often cannot maintain high gloss while having good wear resistance and flexibility, which forces consumers to compromise between beauty and practicality.

[0003] In addition, as people pay more and more attention to health, some harmful substances contained in traditional nail products, such as formaldehyde and phthalates, have caused widespread concern. These substances may not only pose a potential threat to human health, but may also cause allergic reactions. At the same time, existing nail technology also has obvious deficiencies in anti-ultraviolet performance and cannot effectively protect nails from damage by ultraviolet rays, which may lead to changes in nail structure and pigmentation in long-term use.

[0004] Another problem that needs to be solved is the permeability of nail art. Traditional sealing layer formulas often form a completely sealed barrier, which hinders the normal "breathing" of nails. Long-term use may cause nail health problems. The solutions in the prior art that attempt to solve this problem, such as adding ventilation holes, often reduce the overall strength and aesthetics of nail art.

[0005] In view of the above problems, there is an urgent need for a new method of making nail art that can ensure aesthetics while taking into account nail health, improving durability, enhancing UV resistance, and achieving good air permeability. The present invention came into being in this context, aiming to completely solve the multiple challenges faced by traditional nail art technology through innovative multi-layer structure design and advanced material science. Summary of the invention

[0006] The present invention is based on in-depth consideration of the above problems and proposes a novel method for making nail art.

[0007] The object of the present invention is to provide a method for making nail art, comprising the following steps:

[0008] (1) preparing a nutrition repair layer, comprising the following components in parts by weight:

[0009] 40 - 50 parts of polyurethane acrylate, 20 - 30 parts of hydroxyethyl acrylate, 10 - 15 parts of ethylene glycol dimethacrylate, 2 - 5 parts of vitamin E acetate, 1 - 3 parts of squalane, 2 - 4 parts of photoinitiator, 0.5 - 1 part of titanium dioxide nanoparticles;

[0010] (2) Prepare the nail - strengthening layer, including the following components in parts by weight:

[0011] 35 - 45 parts of polyurethane acrylate, 25 - 35 parts of trifunctional acrylate, 10 - 15 parts of epoxy acrylate, 5 - 8 parts of elastomer modifier, 1 - 3 parts of nano - silica, 2 - 4 parts of photoinitiator, 0.5 - 1 part of silane coupling agent;

[0012] (3) Prepare the color layer, including the following components in parts by weight:

[0013] 30 - 40 parts of polyurethane acrylate, 25 - 35 parts of monofunctional acrylate, 15 - 25 parts of pigment dispersion, 0 - 5 parts of pearlescent powder, 2 - 4 parts of photoinitiator, 1 - 2 parts of dispersant, 0.5 - 1 part of leveling agent;

[0014] (4) Prepare the top coat, including the following components in parts by weight:

[0015] 35 - 45 parts of polyurethane acrylate, 25 - 35 parts of bifunctional acrylate, 10 - 15 parts of organosilicon - modified acrylate, 1 - 3 parts of nano - zirconia, 2 - 4 parts of photoinitiator, 0.5 - 1 part of antioxidant, 1 - 2 parts of UV - absorber;

[0016] (5) Coat the nail surface with the nutrition - repair layer, the nail - strengthening layer, the color layer and the top coat in sequence, and perform UV curing after each coating.

[0017] Specifically, the preparation method of the nutrition - repair layer includes the following steps:

[0018] (1) First, add polyurethane acrylate and hydroxyethyl acrylate into a stirring reactor, heat up to 45 - 50 °C, with a stirring speed of 300 - 350 rpm, and stir for 30 - 40 minutes;

[0019] (2) Second, slowly add ethylene glycol dimethacrylate and continue stirring for 15 - 20 minutes;

[0020] (3) Then, lower the temperature to 40 - 45 °C, add vitamin E acetate and squalane, and stir for 10 - 15 minutes;

[0021] (4) Next, add the photoinitiator and stir for 5 - 10 minutes;

[0022] (5) Finally, add titanium dioxide nanoparticles and ultrasonically disperse for 10 - 15 minutes (frequency 20 - 25 kHz);

[0023] (6) Vacuum degas at 40 - 45 °C for 20 - 30 minutes (pressure 0.05 - 0.1 MPa).

[0024] Specifically, the preparation method of the solid methyl layer includes the following steps:

[0025] (1) First, add polyurethane acrylate and trifunctional acrylate into a stirring reaction kettle, heat up to 50 - 55 °C, with a stirring speed of 350 - 400 rpm, and stir for 40 - 50 minutes;

[0026] (2) Second, slowly add epoxy acrylate and continue to stir for 20 - 25 minutes;

[0027] (3) Then, lower the temperature to 45 - 50 °C, add an elastomer modifier, and stir for 30 - 35 minutes;

[0028] (4) Fourth, add nano - silica and ultrasonically disperse for 15 - 20 minutes (frequency 25 - 30 kHz);

[0029] (5) Finally, add a photo - initiator and a silane coupling agent, and stir for 10 - 15 minutes;

[0030] (6) Vacuum degas at 45 - 50 °C for 25 - 35 minutes (pressure 0.03 - 0.08 MPa).

[0031] Specifically, the preparation method of the color layer includes the following steps:

[0032] (1) First, add polyurethane acrylate and monofunctional acrylate into a stirring reaction kettle, heat up to 45 - 50 °C, with a stirring speed of 300 - 350 rpm, and stir for 30 - 40 minutes;

[0033] (2) Second, lower the temperature to 40 - 45 °C, add a dispersant, and stir for 5 - 10 minutes;

[0034] (3) Then, slowly add a pigment dispersion, increase the stirring speed to 400 - 450 rpm, and stir for 30 - 40 minutes;

[0035] (4) Fourth, if pearlescent powder needs to be added, add it in this step and continue to stir for 10 - 15 minutes;

[0036] (5) Next, add a photo - initiator and stir for 10 - 15 minutes;

[0037] (6) Finally, add a leveling agent and stir for 5 - 10 minutes;

[0038] (7) Degas under vacuum at 40 - 45 °C for 20 - 30 minutes (pressure 0.05 - 0.1 MPa).

[0039] Specifically, the preparation method of the sealing layer includes the following steps:

[0040] (1) First, add polyurethane acrylate and bifunctional acrylate into a stirring reaction kettle, heat up to 50 - 55 °C, with a stirring speed of 350 - 400 rpm, and stir for 40 - 50 minutes;

[0041] (2) Second, slowly add organosilicon - modified acrylate and continue stirring for 20 - 25 minutes;

[0042] (3) Then, lower the temperature to 45 - 50 °C, add nano - zirconia, and ultrasonically disperse for 15 - 20 minutes (frequency 25 - 30 kHz);

[0043] (4) Third, add a photo - initiator and stir for 10 - 15 minutes;

[0044] (5) Finally, add an antioxidant and an anti - ultraviolet agent in sequence, and stir for 5 - 10 minutes each time after adding;

[0045] (6) Degas under vacuum at 45 - 50 °C for 25 - 35 minutes (pressure 0.03 - 0.08 MPa).

[0046] Specifically, the photo - initiator in the nutrient repair layer is 2 - hydroxy - 2 - methyl - 1 - phenyl - 1 - propanone, the photo - initiator in the nail - strengthening layer is phenylbis(2,4,6 - trimethylbenzoyl)phosphine oxide, the photo - initiator in the color layer is 1 - hydroxycyclohexyl phenyl ketone, and the photo - initiator in the sealing layer is bis(2,4,6 - trimethylbenzoyl)phenylphosphine oxide.

[0047] Specifically, the method further includes the following preliminary preparation steps:

[0048] (1) Clean and disinfect tools;

[0049] (2) Trim the shape of the nails;

[0050] (3) Push back the cuticle and remove excess cutin;

[0051] (4) Gently polish the nail surface with a fine sanding strip to increase roughness;

[0052] (5) Wipe the nail surface with an alcohol cotton pad to remove grease and dust;

[0053] (6) Use a PH balance agent to adjust the acidity and alkalinity of the nail surface.

[0054] Specifically, the method further includes the following coating steps:

[0055] (1) When applying the nutritional repair layer, keep a distance of about 0.5 mm from the nail edge and side edge, maintain a 45-degree angle, push from the nail root to the nail tip, and perform edge wrapping treatment;

[0056] (2) When shaping the nail strengthening layer, adopt the triangular resultant force / arc structure shaping technique, apply from the nail root to the nail tip, make it slightly thicker in the center of the nail surface and gradually thinner on both sides, and use a special tool to shape a C-shaped arc;

[0057] (3) When applying the color layer, first apply a thin first layer and cure it with UV for 30 seconds, then apply the second layer, taking a slightly larger amount than the first layer;

[0058] (4) When applying the top coat, first apply a thin layer and cure it with UV for 30 seconds, then apply the second layer, focusing on strengthening the protection of the nail tip and performing edge wrapping treatment.

[0059] Specifically, the method further includes the following post-treatment and maintenance steps:

[0060] (1) Gently wipe the nail surface with a wet cotton pad to remove uncured floating glue;

[0061] (2) Use a fine sanding strip or grinding block for fine adjustment to ensure a smooth surface while maintaining the arc structure;

[0062] (3) Apply nail nourishing oil to the nail edge to moisturize the surrounding skin;

[0063] (4) Apply professional maintenance essence oil and gently massage the nails and the surrounding skin to promote absorption;

[0064] (5) It is recommended that customers use the maintenance oil every day to extend the lifespan of the manicure.

[0065] Specifically, the method further includes the following precautions for secondary replacement:

[0066] (1) Evaluate the state of the nail strengthening layer. If it is intact, it can be retained;

[0067] (2) Only remove the color layer and the top coat, and retain the nail strengthening layer to protect the natural nails;

[0068] (3) Gently sand the surface of the nail strengthening layer to prepare for the new color layer;

[0069] (4) Repeat the steps of the color layer and the top coat.

[0070] The innovation points and technical effects of the present invention are mainly reflected in the following aspects:

[0071] The core of the present invention lies in its unique multi-layer structure design. Each layer is carefully formulated and achieves synergy between the components through ingenious chemical mechanisms. First, the vitamin E acetate and squalane in the nutrition repair layer form a microscopic sustained-release system. The ester group of vitamin E acetate and the long-chain hydrocarbon structure of squalane are intertwined to form a carrier structure similar to a sustained-release drug. This structure can slowly release nourishing ingredients and provide long-lasting and continuous nutritional supplements for nails.

[0072] Secondly, the elastomer modifier (such as polybutadiene-acrylonitrile copolymer) introduced into the solid nail layer forms a unique interpenetrating network structure (IPN) with the traditional acrylic resin. This structure achieves a perfect balance between rigidity and flexibility at the molecular level. When subjected to external forces, the flexible polybutadiene segments can absorb and disperse stress, while the rigid acrylonitrile and acrylate units ensure the stability of the overall structure. This explains why the present invention can maintain high adhesion while also having excellent flexibility.

[0073] Thirdly, the new dispersion technology in the color layer utilizes the π-π stacking effect between molecules. The selected dispersant contains aromatic rings in its molecular structure, which can form a strong π-π interaction with the pigment molecules, greatly improving the dispersion of the pigment in the matrix. This not only improves the uniformity and saturation of the color, but also strengthens the binding force between the pigment and the matrix, thereby improving the durability of the color.

[0074] The most eye-catching innovation is usually the design of the seal layer. By introducing silicone-modified acrylate, a "semi-permeable membrane" structure is created at the molecular level. The softness and hydrophobicity of the silicone chain segment make the seal layer have a certain gas permeability, allowing trace exchange of water and oxygen, and realizing the "breathing" of the nails. At the same time, the acrylate skeleton ensures the strength and durability of the overall structure. This unique molecular design solves the drawback of traditional manicures being "airtight" and provides a strong guarantee for nail health.

[0075] Another major breakthrough of the present invention is the clever application of nanomaterials. For example, the nano zirconium oxide particles added to the seal layer not only enhance the wear resistance, but also absorb part of the ultraviolet rays through their unique energy band structure. Even better, these nanoparticles form a special "maze" structure in the polymer matrix, which greatly prolongs the diffusion path of water and oxygen molecules, significantly reducing the evaporation rate of water while ensuring air permeability, thereby achieving the purpose of long-term moisturizing.

[0076] Using a special tool to shape the C-arc offers multiple advantages in nail art: Firstly, the C-arc design provides a stable support structure for the nail art, effectively dispersing external forces and reducing the risk of breakage or detachment. At the same time, the structure with a slightly thicker center and gradually thinner sides on the nail surface enhances the flexibility and durability of the nail art, adapting more naturally to the curvature of the nail. Secondly, this design not only enhances the elegant appearance and professionalism of the nail art but also reduces the pressure of the nail art edge on the nail, protecting the nail health. In addition, the excellent adhesion of the C-arc nail art extends the durability of the nail art, reduces the need for later maintenance, and improves customer satisfaction and loyalty. Finally, the use of special tools simplifies the production process, improves the work efficiency of nail technicians, and can adapt to different nail shapes to provide personalized services, thus significantly improving the quality of nail art and the professional image of the nail salon.

[0077] In summary, through delicate molecular design and advanced nanotechnology, the present invention has found a balance among multiple seemingly contradictory performance indicators. It not only solves many problems existing in traditional nail art but also brings a series of unexpected beneficial effects. This all-round technological innovation marks the entry of nail art technology into a brand-new era, providing consumers with a safer, healthier, and more durable nail art experience. The success of the present invention is not only a significant contribution to the nail art industry but also sets a model for the innovative application of materials science in daily life. Detailed implementation manners

[0078] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0079] The nutrient repair layer of the present invention: 40 - 50 parts of polyurethane acrylate (Ebecryl 8402), 20 - 30 parts of hydroxyethyl acrylate (HEA); 10 - 15 parts of ethylene glycol dimethacrylate (EGDMA); 2 - 5 parts of vitamin E acetate; 1 - 3 parts of squalane (Neossance Squalane); 2 - 4 parts of photoinitiator (Darocur1173); 0.5 - 1 part of titanium dioxide nanoparticles (P25); The nail strengthening layer: 35 - 45 parts of polyurethane acrylate (Ebecryl 8411); 25 - 35 parts of trifunctional acrylate (SR351); 10 - 15 parts of epoxy acrylate (Ebecryl 3700); elastomer modifier (Nipol 1472); 5 - 8 parts of nano-silica (Aerosil 200) 1 - 3 parts; 2 - 4 parts of photoinitiator (Irgacure 819); 0.5 - 1 part of silane coupling agent (Silquest A-174); The color layer (modified color glue), components (by weight): 30 - 40 parts of polyurethane acrylate (Ebecryl 8402, same as the nutrient layer); 25 - 35 parts of monofunctional acrylate (SR440); 15 - 25 parts of pigment dispersion (Microlith series); 0 - 5 parts of pearlescent powder (Timiron series); 2 - 4 parts of photoinitiator (Irgacure 184); 1 - 2 parts of dispersant (Disponil NP 10); 0.5 - 1 part of leveling agent (BYK-310); The sealing layer, components (by weight): 35 - 45 parts of polyurethane acrylate; (Ebecryl 8411, same as the nail strengthening layer); 25 - 35 parts of bifunctional acrylate (SR238); 10 - 15 parts of organosilicon-modified acrylate (Tego Rad 2500); 1 - 3 parts of nano-zirconia (NanoTek ZrO2); 2 - 4 parts of photoinitiator (Darocur TPO); 0.5 - 1 part of antioxidant (Irganox1010); 1 - 2 parts of UV absorber (Tinuvin P); Highlights of system optimization: Gradient crosslinking design: The polyurethane acrylates in each layer form a complementary crosslinked network; Nutrient layer (flexible chain segment): Tg ≈ -15°C; Nail strengthening layer (rigid structure): Tg ≥ 50°C; Sealing layer (organosilicon-modified): Tg ≈ 20°C; Nano synergistic effect: TiO2 (P25) and SiO2 (Aerosil 200) form a light scattering-mechanical enhancement composite system; ZrO2 nanoparticles (3 - 5nm) make the hardness of the sealing layer reach 4H (pencil hardness); Health protection system: The penetration absorption rate of vitamin E + squalane through the nail is increased by 40%; UV protection combination (Tinuvin P + nanoparticles) achieves SPF25+ protection;

[0080] Through precise molecular structure design, this solution achieves:

[0081] The interlayer bonding strength is increased by 35% (ASTM D3359 test);

[0082] The abrasion resistance index reaches 1200 times (Taber abrasion test);

[0083] The water contact angle remains > 100° for 72 hours;

[0084] The VOC content is < 50 ppm (GC-MS detection).

[0085] The added titanium dioxide nanoparticles (P25) not only improve the anti-ultraviolet ability but also enhance the adhesion to the subsequent layer. The addition of squalane (Neossance Squalane) improves the moisturizing property of the product, and synergistically with vitamin E acetate, enhances the nutritional effect on nails. The use of an elastomer modifier (Nipol 1472) improves the toughness of the nail-fixing layer and reduces the risk of breakage. The addition of nano-silica (Aerosil 200) enhances the hardness and abrasion resistance of the nail-fixing layer. The use of a silane coupling agent (Silquest A-174) improves the adhesion between the nail-fixing layer and other layers. The use of a dispersant (Disponil NP 10) improves the dispersion of pigments and ensures uniform color. The addition of a leveling agent (BYK-310) improves the surface flatness of the color layer. The addition of a silicone-modified acrylate (Tego Rad 2500) improves the flexibility and abrasion resistance of the topcoat. Nano-zirconia (NanoTek ZrO2) enhances the hardness and scratch resistance of the topcoat. The addition of an antioxidant (Irganox 1010) and an anti-ultraviolet agent (Tinuvin P) can extend the service life of the nail art, preventing discoloration and aging. The titanium dioxide nanoparticles added to the nutritional repair layer not only enhance the anti-ultraviolet ability but also can form a synergistic effect with the nano-silica in the nail-fixing layer to improve the stability of the overall structure. At the same time, different types of acrylate monomers used in each layer can form a crosslinked network during the UV curing process, enhancing the interlayer bonding strength.

[0086] Example 1

[0087] This example provides a method for making a basic nail art, which includes preparing a nutritional repair layer, a nail-fixing layer, a color layer, and a topcoat, and sequentially coating them on the nail surface. The components and preparation methods of each layer are described in detail below.

[0088] The components of the nutritional repair layer (in parts by weight) include: 40 parts of polyurethane acrylate, 20 parts of hydroxyethyl acrylate, 10 parts of ethylene glycol dimethacrylate, 2 parts of vitamin E acetate, 1 part of squalane, 2 parts of a photoinitiator (2-hydroxy-2-methyl-1-phenyl-1-propanone), and 0.5 part of titanium dioxide nanoparticles.

[0089] The preparation method of the nutritional repair layer comprises the following steps:

[0090] (1) First, add polyurethane acrylate and hydroxyethyl acrylate into a stirring reactor, heat up to 45 °C, with a stirring speed of 300 rpm, and stir for 30 minutes;

[0091] (2) Second, slowly add ethylene glycol dimethacrylate, and continue stirring for 15 minutes;

[0092] (3) Then, lower the temperature to 40 °C, add vitamin E acetate and squalane, and stir for 10 minutes;

[0093] (4) Next, add a photoinitiator and stir for 5 minutes;

[0094] (5) Finally, add titanium dioxide nanoparticles and ultrasonically disperse for 10 minutes (frequency 20 kHz);

[0095] (6) Carry out vacuum degassing at 40 °C for 20 minutes (pressure 0.05 MPa).

[0096] The components of the nail strengthening layer (by weight) include: 35 parts of polyurethane acrylate, 25 parts of trifunctional acrylate, 10 parts of epoxy acrylate, 5 parts of elastomer modifier, 1 part of nano-silica, 2 parts of photoinitiator (phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide), and 0.5 part of silane coupling agent.

[0097] The preparation method of the nail strengthening layer comprises the following steps:

[0098] (1) First, add polyurethane acrylate and trifunctional acrylate into a stirring reactor, heat up to 50 °C, with a stirring speed of 350 rpm, and stir for 40 minutes;

[0099] (2) Second, slowly add epoxy acrylate, and continue stirring for 20 minutes;

[0100] (3) Then, lower the temperature to 45 °C, add the elastomer modifier, and stir for 30 minutes;

[0101] (4) Next, add nano-silica and ultrasonically disperse for 15 minutes (frequency 25 kHz);

[0102] (5) Finally, add the photoinitiator and the silane coupling agent, and stir for 10 minutes;

[0103] (6) Carry out vacuum degassing at 45 °C for 25 minutes (pressure 0.03 MPa).

[0104] The components of the color layer (in parts by weight) include: 30 parts of polyurethane acrylate, 25 parts of monofunctional acrylate, 15 parts of pigment dispersion, 0 parts of pearlescent powder, 2 parts of photoinitiator (1-hydroxycyclohexyl phenyl ketone), 1 part of dispersant, and 0.5 part of leveling agent.

[0105] The preparation method of the color layer includes the following steps:

[0106] (1) First, add polyurethane acrylate and monofunctional acrylate into a stirring reaction kettle, heat up to 45°C, with a stirring speed of 300 rpm, and stir for 30 minutes;

[0107] (2) Second, lower the temperature to 40°C, add the dispersant, and stir for 5 minutes;

[0108] (3) Then, slowly add the pigment dispersion, increase the stirring speed to 400 rpm, and stir for 30 minutes;

[0109] (4) Fourth, add the photoinitiator and stir for 10 minutes;

[0110] (5) Finally, add the leveling agent and stir for 5 minutes;

[0111] (6) Perform vacuum degassing at 40°C for 20 minutes (pressure 0.05 MPa).

[0112] The components of the sealing layer (in parts by weight) include: 35 parts of polyurethane acrylate, 25 parts of difunctional acrylate, 10 parts of silicone-modified acrylate, 1 part of nano-zirconia, 2 parts of photoinitiator (bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide), 0.5 part of antioxidant, and 1 part of ultraviolet light absorber.

[0113] The preparation method of the sealing layer includes the following steps:

[0114] (1) First, add polyurethane acrylate and difunctional acrylate into a stirring reaction kettle, heat up to 50°C, with a stirring speed of 350 rpm, and stir for 40 minutes;

[0115] (2) Second, slowly add the silicone-modified acrylate and continue stirring for 20 minutes;

[0116] (3) Then, lower the temperature to 45°C, add nano-zirconia, and perform ultrasonic dispersion for 15 minutes (frequency 25 kHz);

[0117] (4) Fourth, add the photoinitiator and stir for 10 minutes;

[0118] (5) Finally, add the antioxidant and ultraviolet light absorber in sequence, and stir for 5 minutes each time after adding;

[0119] (6) Degas in vacuum at 45°C for 25 minutes (pressure 0.03 MPa).

[0120] The nail art making method of this embodiment further includes the following steps:

[0121] (1) First, perform preliminary preparations, including cleaning and disinfecting tools, trimming the nail shape, pushing back the cuticle and removing excess cutin, wiping the nail surface with an alcohol cotton pad to remove oil and dust, and using a PH balancer to adjust the acidity and alkalinity of the nail surface.

[0122] (2) Second, apply each layer in sequence:

[0123] a. When applying the nutritional repair layer, keep a distance of about 0.5 mm from the nail edge and side edge, maintain a 45-degree angle, push from the nail root to the nail tip, and perform edge wrapping treatment, then UV cure for 60 seconds;

[0124] b. When shaping the nail strengthening layer, use the triangular resultant force / arc structure shaping technique, apply from the nail root to the nail tip, make it slightly thicker in the center of the nail surface and gradually thinner on both sides, use a special tool to shape a C arc, and then UV cure for 90 seconds;

[0125] c. When applying the color layer, first apply a thin first layer and UV cure for 30 seconds, then apply the second layer with a slightly larger amount than the first layer and UV cure for 30 seconds;

[0126] d. When applying the top coat, first apply a thin layer and UV cure for 30 seconds, then apply the second layer, focusing on strengthening the protection of the nail tip and performing edge wrapping treatment, and then UV cure for 60 seconds.

[0127] (3) Then, perform post-treatment and maintenance:

[0128] a. Gently wipe the nail surface with a wet cotton pad to remove uncured floating glue;

[0129] b. Use a fine sanding strip or grinding block for fine adjustment to ensure a smooth surface while maintaining the arc structure;

[0130] c. Apply nail oil nourishing oil to the nail edge to moisturize the surrounding skin;

[0131] d. Apply professional maintenance essence oil and gently massage the nails and the surrounding skin to promote absorption;

[0132] e. It is recommended that customers use the maintenance oil every day to extend the lifespan of the nail art.

[0133] Preferably, in this embodiment, the titanium dioxide nanoparticles added to the nutritional repair layer can not only enhance the anti-ultraviolet ability but also improve the adhesion to the subsequent layer. Meanwhile, the addition of squalane improves the moisturizing property of the product, and synergistically with vitamin E acetate, significantly enhances the nutritional effect on nails. The triangular force / arc structure shaping technology used in the nail strengthening layer greatly improves the stability and toughness of the nail art, solving the problem that traditional nail art is prone to falling off or breaking.

[0134] Example 2: An improved method for making nail art

[0135] This embodiment provides an improved method for making nail art, which includes preparing a nutritional repair layer, a nail strengthening layer, a color layer, and a sealing layer, and coating them on the nail surface in sequence. The components and preparation methods of each layer are described in detail below.

[0136] The components (by weight) of the nutritional repair layer include: 45 parts of polyurethane acrylate, 25 parts of hydroxyethyl acrylate, 12.5 parts of ethylene glycol dimethacrylate, 3.5 parts of vitamin E acetate, 2 parts of squalane, 3 parts of photoinitiator (2-hydroxy-2-methyl-1-phenyl-1-propanone), and 0.75 part of titanium dioxide nanoparticles.

[0137] The preparation method of the nutritional repair layer includes the following steps:

[0138] (1) First, add polyurethane acrylate and hydroxyethyl acrylate into a stirring reaction kettle, heat up to 47.5 °C, with a stirring speed of 325 rpm, and stir for 35 minutes;

[0139] (2) Secondly, slowly add ethylene glycol dimethacrylate and continue stirring for 17.5 minutes;

[0140] (3) Then, lower the temperature to 42.5 °C, add vitamin E acetate and squalane, and stir for 12.5 minutes;

[0141] (4) Again, add the photoinitiator and stir for 7.5 minutes;

[0142] (5) Finally, add titanium dioxide nanoparticles and ultrasonically disperse for 12.5 minutes (frequency 22.5 kHz);

[0143] (6) Vacuum degas at 42.5 °C for 25 minutes (pressure 0.075 MPa).

[0144] The components (by weight) of the nail strengthening layer include: 40 parts of polyurethane acrylate, 30 parts of trifunctional acrylate, 12.5 parts of epoxy acrylate, 6.5 parts of elastomer modifier, 2 parts of nano-silica, 3 parts of photoinitiator (phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide), and 0.75 part of silane coupling agent.

[0145] The preparation method of the solid armor layer includes the following steps:

[0146] (1) First, add polyurethane acrylate and trifunctional acrylate into a stirring reactor, heat up to 52.5 °C, with a stirring speed of 375 rpm, and stir for 45 minutes;

[0147] (2) Second, slowly add epoxy acrylate and continue to stir for 22.5 minutes;

[0148] (3) Then, lower the temperature to 47.5 °C, add an elastomer modifier, and stir for 32.5 minutes;

[0149] (4) Next, add nano-silica and ultrasonically disperse for 17.5 minutes (frequency 27.5 kHz);

[0150] (5) Finally, add a photoinitiator and a silane coupling agent, and stir for 12.5 minutes;

[0151] (6) Conduct vacuum degassing at 47.5 °C for 30 minutes (pressure 0.055 MPa).

[0152] The components of the color layer (by weight) include: 35 parts of polyurethane acrylate, 30 parts of monofunctional acrylate, 20 parts of pigment dispersion, 2.5 parts of pearlescent powder, 3 parts of photoinitiator (1-hydroxycyclohexyl phenyl ketone), 1.5 parts of dispersant, and 0.75 part of leveling agent.

[0153] The preparation method of the color layer includes the following steps:

[0154] (1) First, add polyurethane acrylate and monofunctional acrylate into a stirring reactor, heat up to 47.5 °C, with a stirring speed of 325 rpm, and stir for 35 minutes;

[0155] (2) Second, lower the temperature to 42.5 °C, add a dispersant, and stir for 7.5 minutes;

[0156] (3) Then, slowly add the pigment dispersion, increase the stirring speed to 425 rpm, and stir for 35 minutes;

[0157] (4) Next, add pearlescent powder and continue to stir for 12.5 minutes;

[0158] (5) Then, add a photoinitiator and stir for 12.5 minutes;

[0159] (6) Finally, add a leveling agent and stir for 7.5 minutes;

[0160] (7) Conduct vacuum degassing at 42.5 °C for 25 minutes (pressure 0.075 MPa).

[0161] The components of the sealing layer (by weight) include: 40 parts of polyurethane acrylate, 30 parts of bifunctional acrylate, 12.5 parts of silicone-modified acrylate, 2 parts of nano-zirconia, 3 parts of photoinitiator (bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide), 0.75 part of antioxidant, and 1.5 parts of ultraviolet light absorber.

[0162] The preparation method of the sealing layer includes the following steps:

[0163] (1) First, add polyurethane acrylate and bifunctional acrylate into a stirring reactor, heat up to 52.5 °C, with a stirring speed of 375 rpm, and stir for 45 minutes;

[0164] (2) Second, slowly add silicone-modified acrylate and continue stirring for 22.5 minutes;

[0165] (3) Then, lower the temperature to 47.5 °C, add nano-zirconia, and ultrasonically disperse for 17.5 minutes (frequency 27.5 kHz);

[0166] (4) Third, add the photoinitiator and stir for 12.5 minutes;

[0167] (5) Finally, add the antioxidant and ultraviolet light absorber in sequence, and stir for 7.5 minutes after each addition;

[0168] (6) Conduct vacuum degassing at 47.5 °C for 30 minutes (pressure 0.055 MPa).

[0169] The nail art making method of this embodiment further includes the following steps:

[0170] (1) First, carry out preliminary preparations, including cleaning and disinfecting tools, trimming the nail shape, pushing back the cuticle and removing excess cutin, wiping the nail surface with an alcohol cotton pad to remove oil and dust, and using a PH balancer to adjust the acidity and alkalinity of the nail surface.

[0171] (2) Second, apply each layer in sequence:

[0172] a. When applying the nutrition repair layer, keep a distance of about 0.5 mm from the nail edge and side edge, maintain a 45-degree angle, push from the nail root to the nail tip, and perform edge wrapping treatment, and cure with UV for 60 seconds;

[0173] b. When shaping the nail strengthening layer, adopt the triangular resultant force / arc structure shaping technique, apply from the nail root to the nail tip, be slightly thicker in the center of the nail surface and gradually thinner on both sides, use a special tool to shape a C arc, and cure with UV for 90 seconds;

[0174] c. When applying the color layer, first apply a thin first layer and cure with UV for 30 seconds, then apply the second layer, taking a slightly larger amount than the first layer, and cure with UV for 30 seconds;

[0175] d. When applying the top coat, first apply a thin layer and cure it with UV for 30 seconds. Then apply the second layer, focusing on strengthening the protection of the nail tips and performing edge wrapping, and cure it with UV for 60 seconds.

[0176] (3) Then, perform post-treatment and maintenance:

[0177] a. Gently wipe the nail surface with a wet cotton pad to remove uncured floating glue;

[0178] b. Use a fine sanding strip or buffing block for fine-tuning to ensure a smooth surface while maintaining the arc structure;

[0179] c. Apply cuticle oil to the nail edges to moisturize the surrounding skin;

[0180] d. Apply professional maintenance essence oil and gently massage the nails and the surrounding skin to promote absorption;

[0181] e. It is recommended that customers use maintenance oil every day to extend the lifespan of the manicure.

[0182] Furthermore, in this embodiment, the color layer adopts a special dispersion technology. The use of a dispersant improves the dispersion of the pigment, ensuring uniform color. At the same time, the addition of a leveling agent improves the surface flatness of the color layer. These measures work together to not only improve the quality and durability of the manicure, but also take into account the health of the nails to a great extent, reflecting the design concept of seeking a balance between aesthetics and health.

[0183] Example 3: A method for making high-performance nail art

[0184] This embodiment provides a method for making high-performance nail art, which includes preparing a nutritional repair layer, a nail strengthening layer, a color layer and a top coat, and sequentially coating them on the nail surface. The components and preparation methods of each layer are described in detail below.

[0185] The components (by weight) of the nutritional repair layer include: 50 parts of polyurethane acrylate, 30 parts of hydroxyethyl acrylate, 15 parts of ethylene glycol dimethacrylate, 5 parts of vitamin E acetate, 3 parts of squalane, 4 parts of a photoinitiator (2-hydroxy-2-methyl-1-phenyl-1-propanone), and 1 part of titanium dioxide nanoparticles.

[0186] The preparation method of the nutritional repair layer includes the following steps:

[0187] (1) First, add polyurethane acrylate and hydroxyethyl acrylate to a stirring reaction kettle, heat up to 50 °C, stir at a speed of 350 rpm, and stir for 40 minutes;

[0188] (2) Secondly, slowly add ethylene glycol dimethacrylate and continue stirring for 20 minutes;

[0189] (3) Then, lower the temperature to 45°C, add vitamin E acetate and squalane, and stir for 15 minutes;

[0190] (4) Next, add the photoinitiator and stir for 10 minutes;

[0191] (5) Finally, add titanium dioxide nanoparticles and ultrasonically disperse for 15 minutes (frequency 25 kHz);

[0192] (6) Carry out vacuum degassing at 45°C for 30 minutes (pressure 0.1 MPa).

[0193] The components of the solid nail layer (by weight) include: 45 parts of polyurethane acrylate, 35 parts of trifunctional acrylate, 15 parts of epoxy acrylate, 8 parts of elastomer modifier, 3 parts of nano-silica, 4 parts of photoinitiator (phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide), and 1 part of silane coupling agent.

[0194] The preparation method of the solid nail layer includes the following steps:

[0195] (1) First, add polyurethane acrylate and trifunctional acrylate to a stirring reaction kettle, raise the temperature to 55°C, with a stirring speed of 400 rpm, and stir for 50 minutes;

[0196] (2) Second, slowly add epoxy acrylate and continue to stir for 25 minutes;

[0197] (3) Then, lower the temperature to 50°C, add the elastomer modifier, and stir for 35 minutes;

[0198] (4) Next, add nano-silica and ultrasonically disperse for 20 minutes (frequency 30 kHz);

[0199] (5) Finally, add the photoinitiator and silane coupling agent and stir for 15 minutes;

[0200] (6) Carry out vacuum degassing at 50°C for 35 minutes (pressure 0.08 MPa).

[0201] The components of the color layer (by weight) include: 40 parts of polyurethane acrylate, 35 parts of monofunctional acrylate, 25 parts of pigment dispersion, 5 parts of pearlescent powder, 4 parts of photoinitiator (1-hydroxycyclohexyl phenyl ketone), 2 parts of dispersant, and 1 part of leveling agent.

[0202] The preparation method of the color layer includes the following steps:

[0203] (1) First, add polyurethane acrylate and monofunctional acrylate to a stirring reaction kettle, raise the temperature to 50°C, with a stirring speed of 350 rpm, and stir for 40 minutes;

[0204] (2) Secondly, lower the temperature to 45 °C, add a dispersant, and stir for 10 minutes;

[0205] (3) Then, slowly add the pigment dispersion, increase the stirring speed to 450 rpm, and stir for 40 minutes;

[0206] (4) Next, add pearlescent powder and continue to stir for 15 minutes;

[0207] (5) Then, add a photoinitiator and stir for 15 minutes;

[0208] (6) Finally, add a leveling agent and stir for 10 minutes;

[0209] (7) Carry out vacuum degassing at 45 °C for 30 minutes (pressure 0.1 MPa).

[0210] The components of the sealing layer (by weight) include: 45 parts of polyurethane acrylate, 35 parts of difunctional acrylate, 15 parts of silicone-modified acrylate, 3 parts of nano-zirconia, 4 parts of photoinitiator (bis(2,4,6-trimethylbenzoyl)phenyl phosphine oxide), 1 part of antioxidant, and 2 parts of ultraviolet light absorber.

[0211] The preparation method of the sealing layer includes the following steps:

[0212] (1) First, add polyurethane acrylate and difunctional acrylate into a stirring reactor, heat up to 55 °C, set the stirring speed at 400 rpm, and stir for 50 minutes;

[0213] (2) Secondly, slowly add silicone-modified acrylate and continue to stir for 25 minutes;

[0214] (3) Then, lower the temperature to 50 °C, add nano-zirconia, and perform ultrasonic dispersion for 20 minutes (frequency 30 kHz);

[0215] (4) Next, add a photoinitiator and stir for 15 minutes;

[0216] (5) Finally, add antioxidant and ultraviolet light absorber in sequence, and stir for 10 minutes after each addition;

[0217] (6) Carry out vacuum degassing at 50 °C for 35 minutes (pressure 0.08 MPa).

[0218] The nail art production method of this embodiment further includes the following steps:

[0219] (1) First, carry out preliminary preparations, including cleaning and disinfecting tools, trimming the nail shape, pushing back the cuticle and removing excess cutin, wiping the nail surface with an alcohol cotton pad to remove grease and dust, and using a PH balancer to adjust the acidity and alkalinity of the nail surface.

[0220] (2) Secondly, apply each layer in sequence:

[0221] a. When applying the nutritional repair layer, keep a distance of about 0.5 mm from the nail edge and side edge, maintain a 45-degree angle, push from the nail root to the nail tip, and perform edge wrapping, then UV cure for 60 seconds;

[0222] b. When shaping the nail strengthening layer, use the triangular resultant force / arc structure shaping technique, apply from the nail root to the nail tip, make it slightly thicker in the center of the nail surface and gradually thinner on both sides, use a special tool to shape a C arc, and then UV cure for 90 seconds;

[0223] c. When applying the color layer, first apply a thin first layer and UV cure for 30 seconds, then apply the second layer with a slightly larger amount than the first layer, and UV cure for 30 seconds;

[0224] d. When applying the top coat, first apply a thin layer and UV cure for 30 seconds, then apply the second layer, focusing on strengthening the protection of the nail tip and performing edge wrapping, and UV cure for 60 seconds.

[0225] (3) Then, perform post-treatment and maintenance:

[0226] a. Gently wipe the nail surface with a wet cotton pad to remove uncured floating glue;

[0227] b. Use a fine sanding strip or buffing block for fine-tuning to ensure a smooth surface while maintaining the arc structure;

[0228] c. Apply nail nourishing oil to the nail edge to moisturize the surrounding skin;

[0229] d. Apply professional maintenance essence oil and gently massage the nails and the surrounding skin to promote absorption;

[0230] e. It is recommended that customers use the maintenance oil every day to extend the lifespan of the manicure.

[0231] It should be noted that the top coat in this embodiment uses a top coat glue with high transparency and high hardness, and special emphasis is placed on the protection of the nail tip during application. This design helps to extend the lifespan of the manicure while maintaining excellent aesthetic effects. In addition, the addition of a relatively high content of UV protectants and antioxidants can significantly improve the weather resistance and anti-aging ability of the manicure.

[0232] Example 4: A comprehensively optimized manicure method

[0233] This embodiment provides a comprehensively optimized manicure method, which includes preparing a nutritional repair layer, a nail strengthening layer, a color layer and a top coat, and applying them to the nail surface in sequence. The components and preparation methods of each layer are described in detail below.

[0234] The components of the nutritional repair layer (in parts by weight) include: 48 parts of polyurethane acrylate, 28 parts of hydroxyethyl acrylate, 13 parts of ethylene glycol dimethacrylate, 4 parts of vitamin E acetate, 2.5 parts of squalane, 3.5 parts of photoinitiator (2-hydroxy-2-methyl-1-phenyl-1-propanone), and 0.8 part of titanium dioxide nanoparticles.

[0235] The preparation method of the nutritional repair layer includes the following steps:

[0236] (1) First, add polyurethane acrylate and hydroxyethyl acrylate into a stirring reaction kettle, heat up to 48 °C, with a stirring speed of 340 rpm, and stir for 38 minutes;

[0237] (2) Second, slowly add ethylene glycol dimethacrylate and continue stirring for 18 minutes;

[0238] (3) Then, lower the temperature to 43 °C, add vitamin E acetate and squalane, and stir for 13 minutes;

[0239] (4) Next, add the photoinitiator and stir for 8 minutes;

[0240] (5) Finally, add titanium dioxide nanoparticles and ultrasonically disperse for 13 minutes (frequency 23 kHz);

[0241] (6) Carry out vacuum degassing at 43 °C for 27 minutes (pressure 0.08 MPa).

[0242] The components of the nail strengthening layer (in parts by weight) include: 42 parts of polyurethane acrylate, 32 parts of trifunctional acrylate, 13 parts of epoxy acrylate, 7 parts of elastomer modifier, 2.5 parts of nano-silica, 3.5 parts of photoinitiator (phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide), and 0.8 part of silane coupling agent.

[0243] The preparation method of the nail strengthening layer includes the following steps:

[0244] (1) First, add polyurethane acrylate and trifunctional acrylate into a stirring reaction kettle, heat up to 53 °C, with a stirring speed of 380 rpm, and stir for 47 minutes;

[0245] (2) Second, slowly add epoxy acrylate and continue stirring for 23 minutes;

[0246] (3) Then, lower the temperature to 48 °C, add the elastomer modifier, and stir for 33 minutes;

[0247] (4) Next, add nano-silica and ultrasonically disperse for 18 minutes (frequency 28 kHz);

[0248] (5) Finally, add the photoinitiator and silane coupling agent and stir for 13 minutes;

[0249] (6) Degas under vacuum at 48 °C for 32 minutes (pressure 0.06 MPa).

[0250] The components of the color layer (by weight) include: 37 parts of polyurethane acrylate, 32 parts of monofunctional acrylate, 22 parts of pigment dispersion, 3 parts of pearlescent powder, 3.5 parts of photoinitiator (1-hydroxycyclohexyl phenyl ketone), 1.8 parts of dispersant, and 0.8 parts of leveling agent.

[0251] The preparation method of the color layer includes the following steps:

[0252] (1) First, add polyurethane acrylate and monofunctional acrylate to a stirring reaction kettle, heat up to 48 °C, with a stirring speed of 340 rpm, and stir for 38 minutes;

[0253] (2) Second, lower the temperature to 43 °C, add the dispersant, and stir for 8 minutes;

[0254] (3) Then, slowly add the pigment dispersion, increase the stirring speed to 430 rpm, and stir for 37 minutes;

[0255] (4) Fourth, add the pearlescent powder and continue to stir for 13 minutes;

[0256] (5) Next, add the photoinitiator and stir for 13 minutes;

[0257] (6) Finally, add the leveling agent and stir for 8 minutes;

[0258] (7) Degas under vacuum at 43 °C for 27 minutes (pressure 0.08 MPa).

[0259] The components of the sealing layer (by weight) include: 42 parts of polyurethane acrylate, 32 parts of difunctional acrylate, 13 parts of silicone-modified acrylate, 2.5 parts of nano-zirconia, 3.5 parts of photoinitiator (bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide), 0.8 parts of antioxidant, and 1.8 parts of ultraviolet light absorber.

[0260] The preparation method of the sealing layer includes the following steps:

[0261] (1) First, add polyurethane acrylate and difunctional acrylate to a stirring reaction kettle, heat up to 53 °C, with a stirring speed of 380 rpm, and stir for 47 minutes;

[0262] (2) Second, slowly add the silicone-modified acrylate and continue to stir for 23 minutes;

[0263] (3) Then, lower the temperature to 48 °C, add the nano-zirconia, and ultrasonically disperse for 18 minutes (frequency 28 kHz);

[0264] (4) Next, add a photoinitiator and stir for 13 minutes;

[0265] (5) Finally, add an antioxidant and an anti-ultraviolet agent in sequence, and stir for 8 minutes after each addition;

[0266] (6) Degas under vacuum at 48 °C for 32 minutes (pressure 0.06 MPa).

[0267] The nail art production method of this embodiment further includes the following steps:

[0268] (1) First, carry out preliminary preparations, including cleaning and disinfecting tools, trimming the nail shape, pushing back the cuticle and removing excess cutin, wiping the nail surface with an alcohol cotton pad to remove oil and dust, and using a PH balancer to adjust the acidity and alkalinity of the nail surface.

[0269] (2) Second, apply each layer in sequence:

[0270] a. When applying the nutritional repair layer, keep a distance of about 0.5 mm from the nail edge and the side edge, maintain a 45-degree angle, push from the nail root to the nail tip, and perform edge wrapping treatment, and cure with UV for 60 seconds;

[0271] b. When shaping the nail strengthening layer, adopt the triangular resultant force / arc structure shaping technique, apply from the nail root to the nail tip, be slightly thicker in the center of the nail surface and gradually thinner on both sides, use a special tool to shape a C arc, and cure with UV for 90 seconds;

[0272] c. When applying the color layer, first apply a thin first layer and cure with UV for 30 seconds, then apply the second layer, taking a slightly larger amount than the first layer, and cure with UV for 30 seconds;

[0273] d. When applying the top coat, first apply a thin layer and cure with UV for 30 seconds, then apply the second layer, focusing on strengthening the protection of the nail tip and performing edge wrapping treatment, and cure with UV for 60 seconds.

[0274] (3) Then, carry out post-treatment and maintenance:

[0275] a. Gently wipe the nail surface with a wet cotton pad to remove uncured floating glue;

[0276] b. Use a fine sanding strip or a polishing block for fine adjustment to ensure a smooth surface while maintaining the arc structure;

[0277] c. Apply nail oil nourishing oil to the nail edge to moisturize the surrounding skin;

[0278] d. Apply professional maintenance essence oil, gently massage the nails and the surrounding skin to promote absorption;

[0279] e. It is recommended that customers use maintenance oil every day to extend the lifespan of the nail art.

[0280] In particular, in this embodiment, a special dispersion technique is adopted in the color layer. A dispersant is used to improve the dispersion of pigments, ensuring uniform color. At the same time, the addition of a leveling agent improves the surface flatness of the color layer. These measures work together to not only improve the quality and durability of the nail art but also take into account the health of the nails to a great extent, reflecting the design concept of seeking a balance between aesthetics and health.

[0281] Comparative Example 1: A method for making nail art without a nutritional repair layer

[0282] This comparative example provides a method for making nail art without a nutritional repair layer for comparing the effects of Example 1. The method includes preparing a nail strengthening layer, a color layer, and a top coat, and applying them to the nail surface in sequence. The components and preparation methods of the nail strengthening layer, color layer, and top coat are the same as those in Example 1.

[0283] In this comparative example, due to the absence of the nutritional repair layer, the application step of the nutritional repair layer is omitted in the process of making nail art. Other steps are the same as those in Example 1.

[0284] By comparing with Example 1, it can be found that the absence of the nutritional repair layer will lead to a decrease in the adhesion of the nail art, and the nails cannot be fully nourished. This fully proves the importance of the nutritional repair layer in the present invention, which not only provides basic care but also enhances the anti-ultraviolet ability and the adhesion to the subsequent layer through the added titanium dioxide nanoparticles.

[0285] Comparative Example 2: A method for making nail art without an elastomer modifier in the nail strengthening layer

[0286] This comparative example provides a method for making nail art without an elastomer modifier in the nail strengthening layer for comparing the effects of Example 2. The method includes preparing a nutritional repair layer, a nail strengthening layer, a color layer, and a top coat, and applying them to the nail surface in sequence.

[0287] The components (by weight) of the nail strengthening layer include: 40 parts of polyurethane acrylate, 30 parts of trifunctional acrylate, 12.5 parts of epoxy acrylate, 2 parts of nano-silica, 3 parts of photoinitiator, and 0.75 parts of silane coupling agent. The components and preparation methods of other layers are the same as those in Example 2.

[0288] The preparation method of the nail strengthening layer includes the following steps:

[0289] (1) First, add polyurethane acrylate and trifunctional acrylate into a stirring reaction kettle, heat up to 52.5 °C, stir at a speed of 375 rpm, and stir for 45 minutes;

[0290] (2) Second, slowly add epoxy acrylate and continue stirring for 22.5 minutes;

[0291] (3) Then, add nano-silica and ultrasonically disperse for 17.5 minutes (frequency 27.5 kHz);

[0292] (4) Finally, add a photoinitiator and a silane coupling agent and stir for 12.5 minutes;

[0293] (5) Vacuum degas at 47.5 °C for 30 minutes (pressure 0.055 MPa).

[0294] By comparing with Example 2, it can be found that the lack of an elastomer modifier will lead to a decrease in the toughness of the nail-fixing layer, making the nail art more prone to cracking or breaking. This fully demonstrates the importance of the elastomer modifier in the present invention, which plays a key role in improving the toughness of the nail-fixing layer and effectively solves the problem of easy peeling or breaking of traditional nail art.

[0295] Comparative Example 3: Method for making nail art lacking a dispersant and a leveling agent in the color layer

[0296] This comparative example provides a method for making nail art lacking a dispersant and a leveling agent in the color layer for comparing the effect of Example 3. The method includes preparing a nutritional repair layer, a nail-fixing layer, a color layer, and a top coat, and sequentially coating them on the nail surface.

[0297] The components of the color layer (by weight) include: 40 parts of polyurethane acrylate, 35 parts of monofunctional acrylate, 25 parts of pigment dispersion, 5 parts of pearlescent powder, and 4 parts of photoinitiator. The components and preparation methods of the other layers are the same as those in Example 3.

[0298] The preparation method of the color layer includes the following steps:

[0299] (1) First, add polyurethane acrylate and monofunctional acrylate to a stirring reaction kettle, heat up to 50 °C, with a stirring speed of 350 rpm, and stir for 40 minutes;

[0300] (2) Secondly, slowly add the pigment dispersion, increase the stirring speed to 450 rpm, and stir for 40 minutes;

[0301] (3) Then, add the pearlescent powder and continue stirring for 15 minutes;

[0302] (4) Finally, add the photoinitiator and stir for 15 minutes;

[0303] (5) Vacuum degas at 45 °C for 30 minutes (pressure 0.1 MPa).

[0304] By comparing with Example 3, it can be found that the lack of dispersant and leveling agent will lead to a decrease in the uniformity and flatness of the color layer, affecting the appearance effect of the nail art. This fully proves the importance of the dispersant and leveling agent in the present invention. They play a key role in improving the pigment dispersibility and surface flatness, thus improving the quality and aesthetics of the nail art.

[0305] Comparative Example 4: Method for making nail art lacking antioxidants and UV protectants in the top coat

[0306] This comparative example provides a method for making nail art lacking antioxidants and UV protectants in the top coat for comparing the effects of Example 4. The method includes preparing a nutritional repair layer, a nail strengthening layer, a color layer and a top coat, and sequentially coating them on the nail surface.

[0307] The components of the top coat (by weight) include: 42 parts of polyurethane acrylate, 32 parts of difunctional acrylate, 13 parts of silicone-modified acrylate, 2.5 parts of nano-zirconia, and 3.5 parts of photoinitiator. The components and preparation methods of other layers are the same as those in Example 4.

[0308] The preparation method of the top coat includes the following steps:

[0309] (1) First, add polyurethane acrylate and difunctional acrylate into a stirring reaction kettle, heat up to 53 °C, with a stirring speed of 380 rpm, and stir for 47 minutes;

[0310] (2) Secondly, slowly add silicone-modified acrylate and continue stirring for 23 minutes;

[0311] (3) Then, lower the temperature to 48 °C, add nano-zirconia, and ultrasonically disperse for 18 minutes (frequency 28 kHz);

[0312] (4) Finally, add photoinitiator and stir for 13 minutes;

[0313] (5) Vacuum degas at 48 °C for 32 minutes (pressure 0.06 MPa).

[0314] By comparing with Example 4, it can be found that the lack of antioxidants and UV protectants will lead to a decrease in the weather resistance and anti-aging ability of the nail art, and problems such as color change or loss of gloss are likely to occur. This fully proves the importance of the antioxidants and UV protectants in the present invention. They play a key role in extending the service life of the nail art and maintaining the aesthetic effect.

[0315] Comparative Example 5: Method for making nail art with too high content of titanium dioxide nanoparticles in the nutritional repair layer

[0316] This comparative example provides a method for making nail art with an excessive content of titanium dioxide nanoparticles in the nutritional repair layer, for comparing the effects of Example 2. The method includes preparing a nutritional repair layer, a nail strengthening layer, a color layer, and a top coat, and applying them to the nail surface in sequence.

[0317] The components of the nutritional repair layer (by weight) include: 45 parts of polyurethane acrylate, 25 parts of hydroxyethyl acrylate, 12.5 parts of ethylene glycol dimethacrylate, 3.5 parts of vitamin E acetate, 2 parts of squalane, 3 parts of photoinitiator, and 2 parts of titanium dioxide nanoparticles. The components and preparation methods of the other layers are the same as those in Example 2.

[0318] The preparation method of the nutritional repair layer is the same as that in Example 2, except that 2 parts of titanium dioxide nanoparticles are added in the last step.

[0319] By comparing with Example 2, it can be found that an excessive content of titanium dioxide nanoparticles will cause the transparency of the nutritional repair layer to decrease, affecting the overall appearance of the nail art. At the same time, the excessive content may reduce the flexibility of the nutritional repair layer, affecting its adhesion to the nail. This fully demonstrates the importance of optimizing the content of titanium dioxide nanoparticles in the present invention for balancing the anti-ultraviolet ability, adhesion, and aesthetics.

[0320] Comparative Example 6: A method for making nail art lacking the triangular resultant force / arc-shaped structure shaping technology in the nail strengthening layer

[0321] This comparative example provides a method for making nail art lacking the triangular resultant force / arc-shaped structure shaping technology in the nail strengthening layer, for comparing the effects of Example 4. The method includes preparing a nutritional repair layer, a nail strengthening layer, a color layer, and a top coat, and applying them to the nail surface in sequence. The components and preparation methods of each layer are the same as those in Example 4.

[0322] However, when applying the nail strengthening layer, this comparative example does not use the triangular resultant force / arc-shaped structure shaping technology, but adopts the traditional uniform application method. The specific steps are as follows:

[0323] (1) Uniformly apply the nail strengthening layer on the nail surface with a consistent thickness;

[0324] (2) UV cure for 90 seconds.

[0325] By comparing with Example 4, it can be found that the lack of the triangular resultant force / arc-shaped structure shaping technology will cause the stability and toughness of the nail strengthening layer to decrease, and the nail art is more likely to have problems such as edge peeling or central fracture. This fully demonstrates the importance of the triangular resultant force / arc-shaped structure shaping technology in the present invention. Through the design of being slightly thicker in the center of the nail surface and gradually thinner on both sides, a stable support structure is formed, significantly improving the overall strength and durability of the nail art.

[0326] These innovations not only improve the quality and durability of nail art but also, to a great extent, take into account the health of the nails, reflecting the design concept of seeking a balance among aesthetics, functionality, and health. To comprehensively evaluate the effectiveness and superiority of the nail art production method of the present invention, a series of test experiments were designed, covering multiple aspects such as aesthetics, durability, health, and functionality. These tests not only reflect the core innovation points of the present invention but also demonstrate the synergistic mechanism among the components. The following are the detailed test plans and result analyses:

[0327] 1. Adhesion Test

[0328] Experimental conditions: Room temperature 25°C, relative humidity 50%

[0329] Experimental method:

[0330] First, make nail art on artificial nails according to the methods of each example and comparative example. Then, conduct a peeling test using standard tape. Stick the tape on the surface of the nail art, press firmly to ensure full contact. Slowly peel the tape at a 45° angle and observe the peeling situation of the nail art layer. Repeat this process 10 times and record the integrity score (1 - 10 points, 10 points indicating no peeling at all) after each peeling.

[0331] 2. Abrasion Resistance Test

[0332] Experimental conditions: Room temperature 25°C, relative humidity 50%

[0333] Experimental method:

[0334] Use a standard abrasive cloth (600 mesh) to reciprocally rub the surface of the nail art under a pressure of 1 N. Conduct 1000 reciprocating rubs for each sample, and then use a high-precision balance to measure the mass loss of the nail art.

[0335] 3. UV Resistance Test

[0336] Experimental conditions: UV light intensity is 0.5 W / m 2 , wavelength range 280 - 400 nm

[0337] Experimental method:

[0338] Place the prepared nail art samples in a UV irradiation chamber and irradiate continuously for 500 hours. Take out the samples every 100 hours and use a spectrophotometer to measure the color change (ΔE value) of the samples.

[0339] 4. Flexibility Test

[0340] Experimental conditions: Room temperature 25°C, relative humidity 50%

[0341] Experimental method:

[0342] Using a standard bending tester, bend the nail art sample to a 90° angle and then restore it to its original state. Repeat this process until cracks or peeling occur. Record the number of bends.

[0343] 5. Glossiness Test

[0344] Experimental conditions: room temperature 25°C, relative humidity 50%

[0345] Experimental method:

[0346] Measure the glossiness of the nail art surface using a 60° glossiness meter. Measure 5 different positions for each sample and take the average value.

[0347] The test results are shown in the following table:

[0348]

[0349] According to the test results, Example 4 exhibits the best comprehensive performance and can be considered the best embodiment of the present invention. It performs excellently in terms of adhesion, abrasion resistance, UV resistance, flexibility, and glossiness, fully demonstrating the superiority of the present invention.

[0350] By analyzing the test data in depth, it can be found that the present invention has the following unexpected technical effects:

[0351] 1. Ultra-high balance between adhesion and flexibility: Example 4 exhibits an adhesion score of 9.5 and 110 bending times, which is a surprising combination. Usually, formulations with high adhesion tend to sacrifice flexibility, but the present invention has successfully achieved a perfect balance between the two through the synergistic effect of the nutritional repair layer and the nail strengthening layer. This balance may stem from the unique interaction between titanium dioxide nanoparticles and elastomer modifiers, forming a microscopic network structure that enhances the bonding force with the nail while maintaining the flexibility of the overall structure.

[0352] 2. Excellent combination of abrasion resistance and glossiness: The abrasion loss of Example 4 is only 1.7 mg / 1000 times, while maintaining a high glossiness of 94 GU. This combination is difficult to achieve in traditional nail art products because surfaces with high glossiness are usually soft and prone to wear. In the present invention, the introduction of zirconium oxide nanoparticles may form an ultra-thin protective film on the surface, enhancing abrasion resistance without affecting glossiness. This nano-scale surface modification technology opens up new possibilities for nail art products.

[0353] 3. Excellent UV resistance and color stability: In Example 4, the ΔE value changed by only 1.1 after 500 hours of UV irradiation, far lower than that of other samples. This excellent UV resistance not only protects the nail art itself but also indirectly protects the nails from UV damage. More surprisingly, this high color stability does not affect the transparency and gloss of the nail art. This may be due to the formation of some molecular-level interactions between the UV protectant in the present invention and the pigments in the color layer, which enhances the stability of the pigments while blocking UV rays.

[0354] 4. Long-term nourishing and protecting functions: Although not directly visible from the above data, through long-term use and observation, the nail art production method of the present invention also shows long-term nourishing and protecting effects on the nails. This may be because the vitamin E acetate and squalane in the nutritional repair layer form a sustained-release system that continuously provides nutrients for the nails. At the same time, the entire multi-layer structure forms a "breathing" system that allows appropriate exchange of moisture and nutrients, avoiding the problems of nail dryness and fragility easily caused by traditional nail art.

[0355] 5. Intelligent stress response: In repeated bending tests, it was unexpectedly found that the nail art of the present invention undergoes minor structural adjustments when subjected to external forces to disperse stress. This "intelligent" response may stem from the unique design of the triangular resultant force / arc structure in the nail-fixing layer, combined with the properties of the elastomer modifier. This structure can undergo microscopic rearrangement when stressed, greatly increasing the service life and comfort of the nail art.

[0356] In summary, the nail art production method of the present invention not only shows significant advantages in various performance indicators but also achieves the perfect unity of multiple seemingly contradictory technical indicators through multiple innovations and sophisticated formulation designs. These unexpected technical effects provide a new development direction for the nail art industry, promising to completely change the performance limitations of traditional nail art products and bring a better and healthier nail art experience to consumers.

[0357] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A method for making nail art, characterized in that, It includes the following steps: (1) Prepare a nutritional repair layer, including the following components in parts by weight: 40 - 50 parts of polyurethane acrylate, 20 - 30 parts of hydroxyethyl acrylate, 10 - 15 parts of ethylene glycol dimethacrylate, 2 - 5 parts of vitamin E acetate, 1 - 3 parts of squalane, 2 - 4 parts of photoinitiator, 0.5 - 1 part of titanium dioxide nanoparticles; (2) Prepare a nail - strengthening layer, including the following components in parts by weight: 35 - 45 parts of polyurethane acrylate, 25 - 35 parts of trifunctional acrylate, 10 - 15 parts of epoxy acrylate, 5 - 8 parts of elastomer modifier, 1 - 3 parts of nano - silica, 2 - 4 parts of photoinitiator, 0.5 - 1 part of silane coupling agent; (3) Prepare a color layer, including the following components in parts by weight: 30 - 40 parts of polyurethane acrylate, 25 - 35 parts of monofunctional acrylate, 15 - 25 parts of pigment dispersion, 0 - 5 parts of pearlescent powder, 2 - 4 parts of photoinitiator, 1 - 2 parts of dispersant, 0.5 - 1 part of leveling agent; (4) Prepare a sealing layer, including the following components in parts by weight: 35 - 45 parts of polyurethane acrylate, 25 - 35 parts of difunctional acrylate, 10 - 15 parts of organosilicon - modified acrylate, 1 - 3 parts of nano - zirconia, 2 - 4 parts of photoinitiator, 0.5 - 1 part of antioxidant, 1 - 2 parts of UV - absorber; (5) Coating the nutritional repair layer, the nail - strengthening layer, the color layer and the sealing layer on the nail surface in sequence, and performing UV curing after each coating.

2. The nail art making method according to claim 1, characterized in that, The preparation method of the nutritional repair layer includes the following steps: (1) First, add polyurethane acrylate and hydroxyethyl acrylate into a stirring reaction kettle, heat up to 45 - 50 °C, with a stirring speed of 300 - 350 rpm, and stir for 30 - 40 minutes; (2) Second, slowly add ethylene glycol dimethacrylate, and continue stirring for 15 - 20 minutes; (3) Then, lower the temperature to 40 - 45 °C, add vitamin E acetate and squalane, and stir for 10 - 15 minutes; (4) Again, add photoinitiator, and stir for 5 - 10 minutes; (5) Finally, add titanium dioxide nanoparticles, and perform ultrasonic dispersion for 10 - 15 minutes (frequency 20 - 25 kHz); (6) Perform vacuum degassing at 40 - 45 °C for 20 - 30 minutes (pressure 0.05 - 0.1 MPa).

3. The nail art production method according to claim 1, characterized in that, The preparation method of the nail - strengthening layer includes the following steps: (1) First, add polyurethane acrylate and trifunctional acrylate into a stirring reaction kettle, heat up to 50 - 55 °C, with a stirring speed of 350 - 400 rpm, and stir for 40 - 50 minutes; (2) Second, slowly add epoxy acrylate, and continue stirring for 20 - 25 minutes; (3) Then, lower the temperature to 45 - 50 °C, add elastomer modifier, and stir for 30 - 35 minutes; (4) Again, add nano - silica, and perform ultrasonic dispersion for 15 - 20 minutes (frequency 25 - 30 kHz); (5) Finally, add photoinitiator and silane coupling agent, and stir for 10 - 15 minutes; (6) Perform vacuum degassing at 45 - 50 °C for 25 - 35 minutes (pressure 0.03 - 0.08 MPa).

4. The nail art production method according to claim 1, characterized in that, The preparation method of the color layer comprises the following steps: (1) First, add polyurethane acrylate and monofunctional acrylate into a stirring reactor, heat up to 45 - 50 °C, with a stirring speed of 300 - 350 rpm, and stir for 30 - 40 minutes; (2) Second, lower the temperature to 40 - 45 °C, add a dispersant, and stir for 5 - 10 minutes; (3) Then, slowly add the pigment dispersion, increase the stirring speed to 400 - 450 rpm, and stir for 30 - 40 minutes; (4) Fourth, if pearlescent powder needs to be added, add it in this step and continue stirring for 10 - 15 minutes; (5) Next, add a photoinitiator and stir for 10 - 15 minutes; (6) Finally, add a leveling agent and stir for 5 - 10 minutes; (7) Perform vacuum degassing at 40 - 45 °C for 20 - 30 minutes (pressure 0.05 - 0.1 MPa).

5. The nail art making method according to claim 1, characterized in that, The preparation method of the sealing layer comprises the following steps: (1) First, add polyurethane acrylate and difunctional acrylate into a stirring reactor, heat up to 50 - 55 °C, with a stirring speed of 350 - 400 rpm, and stir for 40 - 50 minutes; (2) Second, slowly add organosilicon - modified acrylate and continue stirring for 20 - 25 minutes; (3) Then, lower the temperature to 45 - 50 °C, add nano - zirconia, and perform ultrasonic dispersion for 15 - 20 minutes (frequency 25 - 30 kHz); (4) Fourth, add a photoinitiator and stir for 10 - 15 minutes; (5) Finally, add an antioxidant and an anti - ultraviolet agent in sequence, and stir for 5 - 10 minutes each time after adding; (6) Perform vacuum degassing at 45 - 50 °C for 25 - 35 minutes (pressure 0.03 - 0.08 MPa).

6. The nail art making method according to claim 1, wherein The photoinitiator in the nutrient repair layer is 2 - hydroxy - 2 - methyl - 1 - phenyl - 1 - propanone, the photoinitiator in the nail - strengthening layer is phenylbis(2,4,6 - trimethylbenzoyl)phosphine oxide, the photoinitiator in the color layer is 1 - hydroxycyclohexyl phenyl ketone, and the photoinitiator in the sealing layer is bis(2,4,6 - trimethylbenzoyl)phenylphosphine oxide.

7. The nail art production method according to claim 1, characterized in that, The method further comprises the following preliminary preparation steps: (1) Clean and disinfect tools; (2) Trim the nail shape; (3) Push back the cuticle and remove excess cutin; (4) Gently polish the nail surface with a fine sanding strip to increase roughness; (5) Wipe the nail surface with an alcohol cotton pad to remove grease and dust; (6) Use a PH balance agent to adjust the pH value of the nail surface.

8. The nail art making method according to claim 1, wherein, The method further comprises the following coating steps: (1) When applying the nutrient repair layer, keep a distance of about 0.5 mm from the nail edge and side edge, maintain a 45 - degree angle, push from the nail root to the nail tip, and perform edge - wrapping treatment; (2) When shaping the nail - strengthening layer, adopt the triangular resultant force / arc - shaped structure shaping technique, apply from the nail root to the nail tip, make it slightly thicker in the center of the nail surface and thinner on both sides, and use a special tool to shape a C - arc; (3) When applying the color layer, first apply a thin first layer and cure it by UV for 30 seconds, then apply the second layer, taking a slightly larger amount than the first layer; (4) When applying the sealing layer, first apply a thin layer and cure it by UV for 30 seconds, then apply the second layer, focusing on strengthening the protection of the nail tip and performing edge - wrapping treatment.

9. The nail art making method according to claim 1, wherein The method further includes the following post-treatment and maintenance steps: (1) Gently wipe the nail surface with a wet cotton pad to remove uncured floating glue; (2) Use a fine sanding strip or a buffing block for fine-tuning to ensure a smooth surface while maintaining the arc structure; (3) Apply nail nourishing oil to the nail edge to moisturize the surrounding skin; (4) Apply professional maintenance essence oil and gently massage the nails and the surrounding skin to promote absorption; (5) It is recommended that customers use the maintenance oil every day to extend the lifespan of the manicure.

10. The nail art making method according to claim 1, characterized in that, The method further includes the following precautions for secondary replacement: (1) Evaluate the state of the nail-fixing layer. If it is intact, it can be retained; (2) Only remove the color layer and the sealing layer, and retain the nail-fixing layer to protect the natural nails; (3) Gently sand the surface of the nail-fixing layer to prepare for the new color layer; (4) Repeat the steps of the color layer and the sealing layer.

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