Manufacturing process of toothbrush surface paint

Abstract

The invention discloses an environment-friendly preparation process of toothbrush surface paint, which adopts waterborne polyurethane resin as a base material, combines titanium dioxide and iron oxide red as pigments, adopts kaolin as a filler, and is blended with a silver ion antibacterial agent to ensure the environment friendliness, attractiveness and antibacterial property of a paint film. The excellent performance of the paint film is realized by finely grinding until the particle diameter is less than or equal to 2 microns and optimizing the raw material ratio and curing conditions. According to the process, high-speed dispersion and mixing at 40 DEG C are particularly emphasized, a high-efficiency leveling agent is selectively used, the thickness of a paint layer is controlled to be 30-50 microns through an electrostatic spraying technology, and finally drying and curing are performed at 70 DEG C for 1.5 hours. The toothbrush surface paint produced by the process shows excellent wear-resistant, water-resistant and antibacterial characteristics, and meanwhile, the service life of a toothbrush product is prolonged, and the health and safety of a user are improved.

Description

Technical Field

[0001] The invention relates to the field of toothbrush surface paint, in particular to a manufacturing process of toothbrush surface paint. Background Art

[0002] A toothbrush is a personal hygiene product in daily life, mainly used to clean the oral cavity and keep teeth and gums healthy. A traditional manual toothbrush usually consists of bristles, a handle and a brush head. The bristles are used to clean food debris and plaque on the surface of teeth and between teeth. The handle provides a gripping function, while the brush head connects the bristles and the handle and is the part of the toothbrush that contacts the teeth. Traditional toothbrush surface treatment often uses a single coating technology, which has problems such as poor wear resistance, easy fading and poor antibacterial effect. As consumers' requirements for oral hygiene and product quality increase, it is particularly important to develop a surface treatment process that can both beautify the appearance and enhance the antibacterial ability of toothbrushes. Summary of the invention

[0003] The purpose of the present invention is to provide a process for producing a toothbrush surface paint in view of the above-mentioned defects. The present invention is achieved through the following technical solutions:

[0004] A process for producing a toothbrush surface paint comprises the following steps:

[0005] (1) Select environmentally friendly resin as the base material, add pigments, fillers and antibacterial agents to form raw materials;

[0006] (2) mixing the above raw materials and stirring them by a high-speed disperser to fully blend the components to obtain a premixed slurry;

[0007] (3) grinding the premixed slurry;

[0008] (4) adding a curing agent and a leveling agent to the refined slurry for curing;

[0009] (5) applying the prepared paint evenly to the non-bristle area of ​​the toothbrush handle and head, and then drying and curing in a constant temperature oven;

[0010] (6) Testing the wear resistance, water resistance and antibacterial performance of the dried toothbrush surface paint;

[0011] In the step (1), the environmentally friendly resin is an environmentally friendly water-based polyurethane resin;

[0012] In the step (1), the pigment is titanium dioxide (TiO2) as a white pigment;

[0013] In the step (1), red iron oxide (Fe2O3) is selected as color adjustment;

[0014] In the step (1), kaolin is selected as the filler; a silver ion antibacterial agent is selected as the antibacterial agent;

[0015] In step (3), the premixed slurry is ground until the particle diameter in the slurry is less than or equal to 5 microns;

[0016] The curing time in step (4) is 2 to 6 hours;

[0017] In the step (5), the drying temperature is set to 60° C. to 80° C., and the drying duration is 1 to 2 hours.

[0018] Furthermore, in the step (1), the mass of the environmentally friendly waterborne polyurethane resin accounts for 40% of the total mass by mass;

[0019] In the step (1), the mass of titanium dioxide (TiO2) accounts for 5% of the total mass by mass;

[0020] In the step (1), the mass of red iron oxide (Fe2O3) accounts for 1% of the total mass by mass percentage;

[0021] In the step (1), the mass of kaolin accounts for 10% of the total mass by mass;

[0022] In the step (1), the mass of the silver ion antibacterial agent accounts for 0.5% of the total mass by mass;

[0023] Furthermore, in step (2), the raw materials are mixed at a constant temperature of 40° C. and stirred at a speed of 3000 r / min for 15 to 25 min using a high-speed disperser;

[0024] Furthermore, in step (3), the premixed slurry is further ground using a three-roll mill until the pigment particles have a diameter of less than 2 μm.

[0025] Furthermore, in step (4), the curing agent is water-based polyurethane, which accounts for 5% of the total mass by mass.

[0026] Furthermore, in step (4), the leveling agent is selected from one or more of silicone, acid-modified acrylic acid, acrylic acid, and fluorine-modified acrylic acid, and accounts for 5% of the total mass by mass.

[0027] Furthermore, in step (4), the curing time is 4 hours.

[0028] Furthermore, in step (5), an electrostatic spraying technique is used, and the spraying thickness is 30 to 50 microns.

[0029] Furthermore, in step (5), the toothbrush is placed in a constant temperature oven at 70° C. for drying and curing for 1.5 hours.

[0030] Compared with traditional technologies, the advantages of the present invention are: the present invention adopts an environmentally friendly water-based polyurethane resin base material, and adds ingredients such as titanium dioxide, red iron oxide, kaolin and silver ion antibacterial agent to improve the wear resistance of the toothbrush. Through stirring with a high-speed disperser and grinding with a three-roll grinder, the pigment particles are evenly dispersed and refined, increasing the density and uniformity of the paint. Electrostatic spraying technology and constant temperature oven drying and curing further improve the adhesion, wear resistance and water resistance of the toothbrush surface paint. These improvements not only extend the service life of the toothbrush, but also maintain the beauty and functionality of the toothbrush, while reducing maintenance costs. In general, the present invention provides a toothbrush surface paint production process that is more environmentally friendly, antibacterial and wear-resistant, providing consumers with a better quality use experience. DETAILED DESCRIPTION

[0031] Here, exemplary embodiments will be described in detail, and unless otherwise indicated, the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are only examples consistent with some aspects of the present disclosure as detailed in the appended claims.

[0032] A process for producing a toothbrush surface paint comprises the following steps:

[0033] (1) Select environmentally friendly resin as the base material, add pigments, fillers and antibacterial agents to form raw materials;

[0034] Among them, by weight ratio, the environmentally friendly resin adopts an environmentally friendly water-based polyurethane resin accounting for 40% of the total weight; the pigment adopts titanium dioxide (TiO2) accounting for 5% of the total weight as a white pigment; red iron oxide (Fe2O3) accounting for 1% of the total weight is selected as a color adjustment; kaolin accounting for 10% of the total weight is selected as a filler; and silver ion antibacterial agent accounting for 0.5% of the total weight is selected as an antibacterial agent;

[0035] (2) mixing the above raw materials at a constant temperature of 40° C., stirring at a speed of 3000 r / min for 15 to 25 min using a high-speed disperser to fully blend the components to obtain a premixed slurry;

[0036] (3) Use a three-roll mill to grind the premixed slurry until the particle diameter in the slurry is less than or equal to 5 microns. In order to further improve the performance, it is necessary to further grind it to less than 2 microns.

[0037] (4) Adding 5% of waterborne polyurethane and 5% of leveling agent to the refined slurry and curing for 2 to 6 hours, preferably 4 hours; wherein the leveling agent is selected from one or more of silicone, acid-modified acrylic acid, acrylic acid, and fluorine-modified acrylic acid.

[0038] (5) using electrostatic spraying technology, the prepared paint is evenly applied to the non-bristle area of ​​the toothbrush handle and head, with a spraying thickness of 30 to 50 μm, and then dried and cured in a constant temperature oven at 60° C. to 80° C. (preferably 7080° C.) for 1 to 2 hours (preferably 1.5 hours);

[0039] (6) Testing the wear resistance, water resistance and antibacterial performance of the dried toothbrush surface paint;

[0040] The present invention will be further described below with reference to specific embodiments.

[0041] Embodiment 1:

[0042] This embodiment provides a process for making a toothbrush surface paint, and the specific steps are as follows:

[0043] 1. Raw material preparation: Take 400g of environmentally friendly water-based polyurethane resin as the base material, add 50g of titanium dioxide (TiO2) pigment as the white main color, and 5g of red iron oxide (Fe2O3) as a color regulator to increase the richness of the visual effect. At the same time, add 100g of kaolin filler to enhance the physical strength of the paint film, and 5g of silver ion antibacterial agent to ensure the antibacterial performance of the toothbrush surface. All raw materials are mixed to obtain 1000g of raw material.

[0044] 2. Mixing and grinding: Stir the above raw materials at 40°C at 3000 rpm for 20 minutes using a high-speed disperser to ensure uniform mixing. Then, grind the premixed slurry using a three-roll grinder until the pigment particles are less than 2 microns in diameter to improve the smoothness of the paint surface.

[0045] 3. Curing and leveling: Add 50g of waterborne polyurethane curing agent and 50g of silicone leveling agent to the refined slurry to ensure rapid curing and surface smoothness of the paint film. The selection of curing agent and leveling agent is based on their excellent adaptability to waterborne polyurethane resin.

[0046] 4. Painting and curing: Use electrostatic spraying technology to evenly spray the prepared paint on the non-bristle area of ​​the toothbrush handle and head, ensuring that the paint layer thickness is between 35 microns and 45 microns. Then, put the toothbrush into a 70℃ constant temperature oven for drying and curing, and the curing time is 4 hours.

[0047] 5. Performance test: After drying and curing, the toothbrush surface paint is comprehensively tested for wear resistance, water resistance, and antibacterial properties to ensure that the product meets high standards of use.

[0048] Embodiment 2:

[0049] This embodiment adjusts some parameters based on the embodiment 1 to explore the effects under different material proportions and process conditions:

[0050] 1. Raw material preparation: Environmentally friendly water-based polyurethane resin is still used as the base material, but the proportion of some components is adjusted, specifically: 400g of water-based polyurethane resin, titanium dioxide (TiO2) pigment is increased to 60g to enhance white brightness, red iron oxide (Fe2O3) remains unchanged at 5g, kaolin filler is adjusted to 120g to further enhance the wear resistance of the paint film, and silver ion antibacterial agent is maintained at 5g. The total mass is adjusted to 1100g.

[0051] 2. Mixing and grinding: The mixing step is the same as in Example 1, but in the grinding stage, a more advanced ball mill is used instead of a three-roller mill to obtain a finer slurry, and the pigment particle diameter is also controlled to be less than 2 microns.

[0052] 3. Curing and leveling: In terms of curing agent selection, water-based polyurethane is still used, but the leveling agent is a mixture of acid-modified acrylic acid and fluorine-modified acrylic acid, with a total amount of 50g, in order to obtain better leveling and hydrophobic properties of the paint film.

[0053] 4. Coating and curing: Change the spraying thickness to 40 microns to 50 microns to test the effect of different thicknesses on the final paint effect. The drying and curing conditions remain unchanged, that is, curing at 70°C for 1.5 hours.

[0054] 5. Performance test: As in Example 1, a comprehensive performance test was performed to evaluate the effect of the adjusted formula and process on improving product performance.

[0055] Through the above implementation, the prepared toothbrush surface paint has the following significant advantages:

[0056] Environmentally friendly and safe: The use of water-based polyurethane resin and silver ion antibacterial agent ensures that the product is environmentally friendly, non-toxic and harmless to the human body.

[0057] Beautiful and durable: Through precise pigment ratio and fine grinding, the paint surface is smooth, the color is uniform, and it has good wear resistance and water resistance.

[0058] Highly effective antibacterial: The effective addition of silver ion antibacterial agent provides long-term antibacterial protection for the toothbrush surface and helps maintain oral health.

[0059] Process optimization: Through strict temperature control and time management, the efficiency of the production process and the stability of the paint film performance are ensured.

[0060] The above is only one of the specific implementations of the present invention, but the technical features of the present invention are not limited thereto. Any modification, equivalent replacement or improvement made within the technical concept of the present invention shall be included in the protection scope of the present invention.

Claims

1. A process for producing a toothbrush surface paint, comprising the following steps: (1) Select environmentally friendly resin as the base material, add pigments, fillers and antibacterial agents to form raw materials; (2) mixing the above raw materials and stirring them by a high-speed disperser to fully blend the components to obtain a premixed slurry; (3) grinding the premixed slurry; (4) adding a curing agent and a leveling agent to the refined slurry for curing; (5) applying the prepared paint evenly to the non-bristle area of ​​the toothbrush handle and head, and then drying and curing in a constant temperature oven; (6) Testing the wear resistance, water resistance and antibacterial performance of the dried toothbrush surface paint; It is characterized in that: in the step (1), the environmentally friendly resin is an environmentally friendly water-based polyurethane resin; In the step (1), the pigment is titanium dioxide (TiO2) as a white pigment; In the step (1), red iron oxide (Fe2O3) is selected as color adjustment; In the step (1), kaolin is selected as the filler; a silver ion antibacterial agent is selected as the antibacterial agent; In step (3), the premixed slurry is ground until the particle diameter in the slurry is less than or equal to 5 microns; The curing time in step (4) is 2 to 6 hours; In the step (5), the drying temperature is set to 60° C. to 80° C., and the drying duration is 1 to 2 hours.

2. The process for producing a toothbrush surface paint according to claim 1, characterized in that: In the step (1), the mass of the environmentally friendly waterborne polyurethane resin accounts for 40% of the total mass, by mass percentage; In the step (1), the mass of titanium dioxide (TiO2) accounts for 5% of the total mass by mass; In the step (1), the mass of red iron oxide (Fe2O3) accounts for 1% of the total mass by mass percentage; In the step (1), the mass of kaolin accounts for 10% of the total mass by mass; In the step (1), the mass of the silver ion antibacterial agent accounts for 0.5% of the total mass, calculated by mass percentage.

3. The process for producing a toothbrush surface paint according to claim 1, characterized in that: In step (2), the raw materials are mixed at a constant temperature of 40° C. and stirred at a speed of 3000 r / min for 15 to 25 min using a high-speed disperser.

4. The process for producing a toothbrush surface paint according to claim 1, characterized in that: In step (3), the premixed slurry is further ground using a three-roll mill until the pigment particles have a diameter of less than 2 microns.

5. The process for producing a toothbrush surface paint according to claim 1, characterized in that: In step (4), the curing agent is water-based polyurethane, which accounts for 5% of the total mass by mass.

6. The process for producing a toothbrush surface paint according to claim 1, characterized in that: In step (4), the leveling agent is selected from one or more of silicone, acid-modified acrylic acid, acrylic acid, and fluorine-modified acrylic acid, and accounts for 5% of the total mass by mass.

7. The process for producing a toothbrush surface paint according to claim 1, characterized in that: In step (4), the curing time is 4 hours.

8. The process for producing a toothbrush surface paint according to claim 1, characterized in that: In step (5), an electrostatic spraying technique is used, and the spraying thickness is 30 to 50 microns.

9. The process for producing a toothbrush surface paint according to claim 1, characterized in that: In step (5), the toothbrush is placed in a constant temperature oven at 70° C. for drying and curing for 1.5 hours.