Cosmetic contact lens based on water-based ink film refraction principle and preparation method thereof

Abstract

The invention discloses a cosmetic contact lens based on a water-based ink film refraction principle, the cosmetic contact lens comprises a base material layer, an ink layer and a protective layer, the ink layer comprises the following components by mass: 40-60 parts of water-based acrylic resin, 10-20 parts of nanoscale titanium dioxide particles, 5-15 parts of an organic pigment, 3-8 parts of a dispersant, 2-5 parts of a plasticizer, and 20-30 parts of deionized water; the preparation method of the cosmetic contact lens comprises the steps of ink layer preparation, base material layer pretreatment, ink layer coating and curing treatment, through design and application of the water-based ink film, the cosmetic contact lens shows unique colors and refraction effects under different light conditions, and meanwhile the safety and comfort of the cosmetic contact lens are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cosmetic contact lenses, and in particular to cosmetic contact lenses based on the refraction principle of water-based ink films and a preparation method thereof. Background Art

[0002] At present, the cosmetic contact lens products on the market mainly achieve color and pattern effects by printing a pigment layer on the lens. However, the traditional pigment printing method has many problems, such as poor pigment stability, which may cause pigment shedding after long-term wearing, affecting eye health; the color expression is single, which is difficult to meet consumers' demand for personalized and diversified visual effects. In addition, the existing cosmetic contact lens products lack innovation in light refraction effects and cannot present rich and varied visual effects under different light conditions. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a cosmetic contact lens based on the refraction principle of water-based ink film and a method for preparing the same. Through the design and application of the water-based ink film, the cosmetic contact lens can present unique colors and refraction effects under different lighting conditions, while improving the safety and comfort of the cosmetic contact lens.

[0004] To achieve the above objectives, the present invention is implemented through the following technical scheme: a cosmetic contact lens based on the refraction principle of water-based ink film, the cosmetic contact lens comprises a substrate layer, an ink layer and a protective layer, the ink layer comprises the following components by mass: water-based acrylic resin: 40-60 parts, nano-scale titanium dioxide particles: 10-20 parts, organic pigment: 5-15 parts, dispersant: 3-8 parts, plasticizer: 2-5 parts, deionized water: 20-30 parts.

[0005] A method for preparing cosmetic contact lenses based on the refraction principle of water-based ink films, specifically comprising the following components: S1 ink layer preparation, specifically: (1) Slowly add the weighed water-based acrylic resin into the stirring container, turn on the stirring equipment, and stir at a low speed; (2) Then add nano-sized titanium dioxide particles, organic pigments, dispersants and plasticizers in sequence, and increase the speed of stirring; (3) Finally, add deionized water and continue stirring at high speed; (4) After stirring, test the water-based ink to see if its viscosity, fineness and other indicators meet the requirements; S2 substrate layer pretreatment, specifically: (1) Select appropriate contact lens substrate; (2) placing the selected lens substrate into an ultrasonic cleaning tank filled with deionized water for ultrasonic cleaning; (3) Place the lens after ultrasonic cleaning into the processing chamber of the plasma processing equipment, start the equipment, adjust the equipment parameters, set the plasma processing time, and perform activation treatment on the lens surface; S3 Ink layer coating, specifically: (1) Carefully place the pre-treated lens at the center position of the rotating platform of the spin coating equipment with tweezers, and use a pipette or dropper to suck an appropriate amount of aqueous ink and slowly drop it at the center position of the lens; (2) Start the spin coating equipment, control the spin coating speed at 1000 - 2000 revolutions per minute, and control the coating time at 3 - 5 minutes; S4 Curing treatment, specifically: (1) Preheat the oven, and after reaching the temperature, carefully place the lens coated with ink on the tray inside the oven with tweezers; (2) Set the curing temperature and curing time for curing treatment.

[0006] The present invention further defines the technical solution: Preferably, the dispersant adopts polyethylene glycol or lecithin, and the plasticizer adopts polycaprolactone or triacetin.

[0007] Preferably, the protective layer adopts a polymer coating.

[0008] Preferably, the substrate layer adopts a material with good optical properties, oxygen permeability, and softness.

[0009] Preferably, in S1(1), the low-speed stirring speed is 300 - 500 revolutions per minute; in S1(2), the speed is increased to 800 - 1000 revolutions per minute and stirred for 5 - 10 minutes; in S1(3), high-speed stirring is carried out at 1000 - 1500 revolutions per minute for 30 - 60 minutes.

[0010] Preferably, in S2(2), the ultrasonic cleaning time is 5 - 10 minutes; in S2(3), the plasma processing time is 1 - 3 minutes.

[0011] Preferably, in S4(1), the preheating temperature is 40 - 55 °C; in S4(2), the curing temperature is 60 - 80 °C, and the curing time is 1 - 2 hours. Beneficial effects

[0012] Compared with the prior art, the following beneficial effects are achieved: The base material layer of the present invention uses materials with good optical properties, oxygen permeability, and softness, such as silicone hydrogel, hydrogel, etc. These materials can ensure the normal breathing and comfort of the eyes when wearing colored contact lenses. After ultrasonic cleaning to remove surface impurities and activation by plasma treatment technology, a good adhesion is achieved between the water-based ink film and the lens base material, making it not easy to fall off, ensuring the service life and stability of the colored contact lenses, and also ensuring the smooth progress of subsequent manufacturing processes.

[0013] The ink layer of the present invention uses water-based acrylic resin as the main film-forming substance, endowing the ink film with good film-forming properties and stability; adding nano-titanium dioxide particles, and the refractive index of the ink film can be accurately regulated by adjusting its content. When light enters this film layer, the nano-titanium dioxide particles will interact with the light, and according to different refractive index conditions, phenomena such as light refraction and scattering will occur, thereby achieving unique color and refraction effects to meet the personalized visual needs of consumers; adding organic pigments provides rich color choices for the ink film, the dispersant ensures the uniform dispersion of each component, the plasticizer increases the flexibility of the ink film, reduces the friction on the eyes, improves the wearing comfort, and deionized water as a solvent ensures the fluidity and processability of the whole system. The whole does not contain harmful organic solvents, reduces the irritation and potential harm to the eyes, and improves the safety of wearing colored contact lenses.

[0014] In the preparation process, the lens base material is subjected to ultrasonic cleaning and plasma treatment, and then the water-based ink is uniformly coated on the surface of the pretreated lens base material by spin coating to form a uniform thin film, and then through curing treatment, the ink film is firmly attached to the lens. Specific Embodiments

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present invention. Embodiment

[0016] The present invention provides a technical solution: a colored contact lens based on the refraction principle of a water-based ink film, which consists of a base material layer, an ink layer, and a protective layer. The ink layer includes the following components by mass: water-based acrylic resin: 40 parts, nano-titanium dioxide particles: 10 parts, organic pigment: 5 parts, dispersant: 3 parts, plasticizer: 2 parts, deionized water: 20 parts.

[0017] The preparation method of the above-mentioned colored contact lens based on the refraction principle of a water-based ink film specifically includes the following components: S1 Preparation of the ink layer, specifically: (1) Slowly add the weighed waterborne acrylic resin into the stirring container, start the stirring equipment, and stir at 300 revolutions per minute. (2) Then, successively add nano-titanium dioxide particles, organic pigments, dispersants, and plasticizers, increase the rotation speed to 800 revolutions per minute, and stir for 10 minutes. (3) Finally, add deionized water and stir at a high speed of 1200 revolutions per minute for 45 minutes. (4) After stirring is completed, detect the water-based ink and check whether its viscosity, fineness, and other indicators meet the requirements. S2 Substrate layer pretreatment, specifically: (1) Select a suitable contact lens substrate. (2) Place the selected lens substrate in an ultrasonic cleaning tank filled with deionized water and perform ultrasonic cleaning for 10 minutes. (3) Put the ultrasonically cleaned lens into the processing chamber of the plasma processing equipment, start the equipment, and adjust the equipment parameters. Set the plasma processing time to 2 minutes to activate the lens surface. S3 Ink layer coating, specifically: (1) Carefully place the pretreated lens at the center of the rotating platform of the spin coating equipment with tweezers. Use a pipette or dropper to suck an appropriate amount of water-based ink and slowly drop it at the center of the lens. (2) Start the spin coating equipment, control the spin coating speed at 1800 revolutions per minute, and control the coating time at 3 minutes. S4 Curing treatment, specifically: (1) Preheat the oven to 45 °C. After reaching the temperature, carefully place the lens coated with ink on the tray in the oven with tweezers. (2) Set the curing temperature and curing time for curing treatment. The curing temperature is 80 °C, and the curing time is 1.2 hours.

[0018] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising", or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article, or device.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cosmetic contact lens based on the refraction principle of water-based ink film, the cosmetic contact lens comprises a substrate layer, an ink layer and a protective layer, characterized in that: The ink layer comprises the following components by weight: 40-60 parts of water-based acrylic resin, 10-20 parts of nano-scale titanium dioxide particles, 5-15 parts of organic pigments, 3-8 parts of dispersants, 2-5 parts of plasticizers, and 20-30 parts of deionized water.

2. The cosmetic contact lens based on the refraction principle of water-based ink film according to claim 1, characterized in that: The dispersant is polyethylene glycol or lecithin, and the plasticizer is polycaprolactone or triacetin.

3. The cosmetic contact lens based on the refraction principle of water-based ink film according to claim 1, characterized in that: The protective layer is a high molecular polymer coating.

4. The cosmetic contact lens based on the refraction principle of water-based ink film according to claim 1, characterized in that: The substrate layer is made of a material having good optical properties, oxygen permeability and softness.

5. A method for preparing cosmetic contact lenses based on the refraction principle of water-based ink films according to any one of claims 1 to 4, characterized in that: Specifically include the following components: S1 ink layer preparation, specifically: (1) Slowly add the weighed water-based acrylic resin into the stirring container, turn on the stirring equipment, and stir at a low speed; (2) Then add nano-sized titanium dioxide particles, organic pigments, dispersants and plasticizers in sequence, and increase the speed of stirring; (3) Finally, add deionized water and continue stirring at high speed; (4) After stirring, test the water-based ink to see if its viscosity, fineness and other indicators meet the requirements; S2 substrate layer pretreatment, specifically: (1) Select appropriate contact lens substrate; (2) placing the selected lens substrate into an ultrasonic cleaning tank filled with deionized water for ultrasonic cleaning; (3) placing the lens after ultrasonic cleaning into the processing chamber of the plasma treatment equipment, starting the equipment, adjusting the equipment parameters, setting the plasma treatment time, and activating the lens surface; S3 ink layer coating, specifically: (1) Use tweezers to carefully place the pre-treated lens on the center of the rotating platform of the spin coating equipment, use a pipette or dropper to absorb an appropriate amount of water-based ink, and slowly drip it on the center of the lens; (2) Start the spin coating equipment, control the spin coating speed at 1000-2000 rpm, and control the coating time at 3-5 minutes; S4 curing treatment, specifically: (1) Preheat the oven. When the temperature reaches the required level, use tweezers to carefully place the lens coated with ink on the tray in the oven. (2) Set the curing temperature and curing time for curing.

6. The method for preparing cosmetic contact lenses based on the refraction principle of water-based ink films according to claim 5, characterized in that: In S1 (1), the low-speed stirring speed is 300-500 rpm; in S1 (2), the speed is increased to 800-1000 rpm and stirred for 5-10 minutes; in S1 (3), the high-speed stirring speed of 1000-1500 rpm is used for 30-60 minutes.

7. The method for preparing cosmetic contact lenses based on the refraction principle of water-based ink films according to claim 5, characterized in that: The ultrasonic cleaning time in S2 (2) is 5-10 minutes; the plasma treatment time in S2 (3) is 1-3 minutes.

8. The method for preparing cosmetic contact lenses based on the refraction principle of water-based ink films according to claim 5, characterized in that: The preheating temperature in S4 (1) is 40-55°C; the curing temperature in S4 (2) is 60-80°C, and the curing time is 1-2 hours.