Novel high-definition blue-light-resistant nylon lens and preparation method thereof

Abstract

The invention discloses a novel high-definition blue-light-resistant nylon lens and a preparation method thereof. The novel high-definition blue-light-resistant nylon lens is prepared from the following raw materials in parts by weight: 0.01 to 0.15 part of first toner, 100 to 180 parts of color master batch, 0.11 to 0.61 part of dispersing agent and 0.20 to 0.80 part of functional additive, the color master batch is prepared from the following raw materials in parts by weight: 1000 parts of polyamide, 140-180 parts of an ultraviolet stabilizer and 0.11-0.61 part of a dispersing agent. According to the scheme, the color powder is successfully and uniformly dispersed into the nylon material through accurate proportioning of the raw materials and a special manufacturing process, and under the combined action of the first color powder, the second color powder and the ultraviolet stabilizer, the nylon lens base material has an excellent anti-blue-light function and has excellent color reducibility and high transmissivity, and the service life of the nylon lens base material is prolonged. And a user can obtain more comfortable, attractive and clear visual experience in the use process.

Description

Technical Field

[0001] The present application relates to the technical field of optical materials, and mainly to a novel high-definition anti-blue light nylon lens and a preparation method thereof. Background Art

[0002] Blue light is widely used in various electronic products as the background light source of liquid crystal displays. Short-wave blue light (400-480nm) has relatively high energy, which will increase the amount of toxins in the macula of the eye, seriously threatening our health. In the field of optical lenses, with the popularization of electronic products and the increase in people's awareness of healthy eye use, the development of lenses that can effectively resist specific wavelengths of blue light (especially high-energy short-wave blue light in the range of 400-420nm) has become an important research direction.

[0003] Nylon lenses are made of transparent polyamide materials. They have extremely high toughness, impact resistance, heat resistance and chemical stability. They can maintain good shape stability after multiple bending or deformation, and have strong resistance to solvents, greases and other substances. In addition, nylon lenses are light and can be worn comfortably for a long time. At the same time, nylon materials themselves have good UV resistance, which can block harmful ultraviolet rays and protect eye health. Nylon materials are widely used in space suit masks, military and police explosion-proof and precision instruments. However, there are many technical challenges in realizing the anti-blue light function on nylon lenses:

[0004] (1) The contradiction between material properties and anti-blue light function: Nylon material has excellent physical properties and processing properties, but it does not have the ability to directly absorb or reflect 420nm blue light. Traditionally, the anti-blue light function relies on coating the lens surface or adding specific anti-blue light factors, but these methods often affect the performance of the nylon material itself, such as light transmittance, refractive index, and yellowing and distortion of the lens.

[0005] (2) Difficulty in maintaining optical performance: Traditional anti-blue light technology often causes problems such as color deviation and decreased light transmittance of lenses, which in turn affects the user's visual experience. It is especially difficult to achieve these goals on nylon materials.

[0006] (3) Complexity of process implementation: To effectively combine color powder in nylon material and realize anti-blue light function through high-temperature injection molding process, it is necessary to solve multiple technical problems such as material mixing uniformity, temperature control during injection molding, and mold design accuracy. The interaction of these factors makes the process implementation extremely complex and it is difficult to ensure the stability and consistency of the final product.

[0007] These challenges limit the widespread application of nylon materials in high-end optical lenses. Therefore, it is of great significance to develop a new type of high-definition anti-blue light nylon lens. Summary of the invention

[0008] In view of the technical problem in the prior art that the nylon lens substrate itself is difficult to achieve blue light resistance, the present application proposes a new high-definition blue light resistance nylon lens and a preparation method thereof.

[0009] According to one aspect of the present invention, a novel polymer anti-blue light polyamide material is proposed. The raw materials for preparing the material include, by weight: 0.01-0.15 parts of a first color powder, 100-180 parts of a masterbatch, 0.11-0.61 parts of a dispersant and 0.20-0.80 parts of a functional additive; the raw materials for preparing the masterbatch include, by weight: 1000 parts of polyamide, 140-180 parts of a UV stabilizer and 0.11-0.61 parts of a dispersant.

[0010] This solution innovatively abandons the traditional preparation method of coating the anti-blue light film on the surface of the nylon lens substrate, and instead adopts a new material modification process: by introducing UV stabilizers into the nylon material (polyamide) to make masterbatches, and then accurately mixing the masterbatches with color powders, so that the color powders can be evenly dispersed in the nylon material, and finally successfully producing a new type of high-definition anti-blue light nylon lens. This unique process can not only effectively avoid the adverse effects on the optical performance, weather resistance, reflectivity, yellowing, distortion, etc. of the lens that may be introduced during the coating process, but also fundamentally improve the anti-blue light performance of the lens, solve the problem that nylon materials are difficult to combine with anti-blue light factors, and achieve optimization at the material level, rather than relying solely on the surface treatment of the lens substrate. The UV stabilizer of this solution can absorb part of the blue light (especially short-wave blue light) and ultraviolet rays with shorter wavelengths. Under the synergistic effect of the masterbatch and color powder made by a special process, the nylon lens substrate itself can have high-fidelity, high-definition and high-efficiency anti-blue light functions without the need for coating or other processes, thereby increasing the thickness resistance and reducing the production cost.

[0011] Preferably, the dispersant includes vinyl bisstearamide. Vinyl bisstearamide has good external and internal lubrication. By reducing surface tension, vinyl bisstearamide helps maintain the stability of the dispersion system and prevents particle aggregation. It can evenly disperse additives such as toner in the polyamide material, avoiding the carbonization problem caused by a small proportion of toner powder, thereby improving the uniformity, transparency and clarity of the lens.

[0012] Preferably, the functional additive includes a second color powder.

[0013] In a specific embodiment, the functional additive can absorb 580nm visible light, thereby enhancing the anti-blue light performance of the lens. By properly matching the first color powder and the second color powder, the lens can have excellent color reproduction and high transmittance while ensuring the anti-blue light performance, and can effectively avoid the yellowing of the lens.

[0014] According to a second aspect of the present invention, a new type of high-definition anti-blue light nylon lens is proposed, which is made of a new type of high-molecular anti-blue light polyamide material.

[0015] According to a third aspect of the present invention, a method for preparing a novel high-definition anti-blue light nylon lens is proposed, comprising the following steps:

[0016] S1, drying pretreatment of raw materials;

[0017] S2, premixing the polyamide, the UV stabilizer and the dispersant by weight, and then putting them into an extruder for mixing, extruding, cooling and pelletizing to prepare the masterbatch; the working temperature of the extruder is 270-290° C.;

[0018] S3. Add the raw materials in the order of the masterbatch, the dispersant, the first color powder and the functional additive in parts by weight for premixing, and then put them into an injection molding machine for mixing, ejection and injection molding to produce the new high-definition anti-blue light nylon lens; the working temperature of the injection molding machine is 255-285°C, the working temperature of the injection mold is 70-90°C, and the injection pressure is 80-130Pa.

[0019] Nylon material has strong chemical and acid resistance. Directly mixing it with color powder will easily cause uneven coloring. Directly blending the color powder into the nylon material will easily cause the color powder to crack and lose its function. Therefore, this solution adopts a special process to covalently bond the UV stabilizer to the nylon material macromolecular group, and use a dispersant to make a masterbatch. The masterbatch is then mixed with the color powder to overcome the repulsion of nylon plastic to heterosexual materials, ensure uniform fusion with the color powder, and exert its anti-blue light function.

[0020] In the premixing step, the masterbatch, dispersant, first color powder and functional additive are added in order to ensure uniform dispersion and synergistic effect of each component. Adding the masterbatch first can provide a stable dispersion base for the mixed system to avoid pigment particle agglomeration; adding the dispersant later can further optimize the dispersion effect, reduce the surface tension of the particles, and improve the uniformity of the system. The first color powder is added later, and it can achieve rapid and uniform distribution with the help of the stable dispersion environment that has been formed, preventing the occurrence of color difference and color spots. Finally, adding the functional additive can ensure its uniform distribution in the system to avoid uneven color mixing. This order of addition not only improves mixing efficiency and process stability, but also optimizes the optical properties and overall quality of the nylon lens substrate.

[0021] Preferably, the method further includes S4, performing surface treatment and optical processing on the new high-definition anti-blue light nylon lens.

[0022] In a specific embodiment, reprocessing of the nylon lens substrate (such as surface coating, optical processing, etc.) can significantly improve the overall performance and user experience of the lens, ensure optical accuracy and mechanical stability, and bring users a more comfortable, beautiful and clear visual experience.

[0023] Preferably, in S1, the drying temperature is 90-100°C and the drying time is 5-6h. Nylon material has strong hygroscopicity, so the moisture in the nylon material and the toner can be effectively removed by drying pretreatment to prevent moisture from affecting the process stability. Under this drying condition, the moisture in the nylon material and the toner can be fully removed without causing thermal degradation or performance loss of the material.

[0024] Preferably, the screw temperature of the extruder is 290-310°C. The screw temperature setting range ensures that the polyamide, UV stabilizer and dispersant can be effectively melt-mixed, while avoiding material degradation caused by excessively high temperatures, thereby ensuring the quality of the masterbatch. Through the mixing, extrusion, cooling and pelletizing processes of the extruder, a masterbatch with a uniform dispersion of UV stabilizer is prepared, providing a key raw material for subsequent lens preparation.

[0025] Preferably, in S2, the diameter of the masterbatch is 2-4 mm. Keeping the masterbatch diameter within the range of 2-4 mm can ensure good fluidity and dispersibility during the injection molding process, reduce the problems of color powder aggregation and uneven distribution, and thus improve the uniformity and stability of the optical performance of the lens.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The novel high-definition anti-blue light nylon lens of the present application solves the contradiction between nylon material and anti-blue light function. Through the precise proportion of raw materials and the special masterbatch manufacturing process, the color powder is successfully dispersed evenly into the nylon material. Under the joint action of the first color powder, the second color powder and the ultraviolet stabilizer, the nylon lens substrate itself can have the anti-blue light function;

[0028] (2) The new high-definition anti-blue light nylon lens of the present application effectively avoids the phenomenon of yellowing of the lens and high reflectivity of the coated lens, and while ensuring the anti-blue light performance, it has excellent color reproduction and high transmittance, so that users can obtain a clearer and more realistic visual experience during use, while also improving the protective effect of the lens;

[0029] (3) The present application effectively simplifies the production process of the overall lens through the use of high-efficiency masterbatch technology, and omits the complex coating process; this method not only improves the controllability of the production process, but also significantly enhances the stability and repeatability of the process; in addition, this method can also effectively ensure the stability of the physical and chemical properties and quality indicators of the final product and the consistency between batches, meeting the implementation requirements of large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and are used together with the description to explain the principles of the present invention. It will be easy to recognize other embodiments and many expected advantages of the embodiments because they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale with each other. The same reference numerals refer to corresponding similar parts.

[0031] Figure 1 A schematic diagram of a method for preparing a novel high-definition anti-blue light nylon lens according to an embodiment of the present invention is shown;

[0032] Figure 2 The transmission spectrum of the new high-definition anti-blue light nylon lens according to the specific embodiment 1 of the present invention is shown;

[0033] Figure 3 The transmission spectrum of the new high-definition anti-blue light nylon lens according to the specific embodiment 2 of the present invention is shown;

[0034] Figure 4 The transmission spectrum of the new high-definition anti-blue light nylon lens according to Comparative Example 1 of the present invention is shown;

[0035] Figure 5 The transmittance spectrum of the new high-definition anti-blue light nylon lens according to Comparative Example 2 of the present invention is shown. DETAILED DESCRIPTION

[0036] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the inventions. It should also be noted that, for ease of description, only the parts related to the relevant inventions are shown in the accompanying drawings, and the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0037] Figure 1 A schematic diagram of a method for preparing a novel high-definition anti-blue light nylon lens according to an embodiment of the present invention is shown. Figure 1 , the specific preparation method is as follows:

[0038] S1. Pre-dry the raw materials at a drying temperature of 90-100°C and a drying time of 5-6h;

[0039] S2, premixing polyamide, UV stabilizer and dispersant by weight and putting them into an extruder for mixing, extruding, cooling and pelletizing to prepare masterbatch; the working temperature of the extruder is 270-290° C., and the screw temperature is 290-310° C.;

[0040] S3, adding the raw materials in the order of masterbatch, dispersant, first color powder and functional additives in parts by weight to mix, and then putting them into an injection molding machine for mixing, injection and injection molding to prepare a new high-definition anti-blue light nylon lens; the working temperature of the injection molding machine is 255-285° C.; the working temperature of the injection mold is 70-90° C., and the injection pressure is 80-130 Pa;

[0041] S4. Perform surface treatment and optical processing on the new high-definition anti-blue light nylon lens.

[0042] Example 1

[0043] A new type of high molecular anti-blue light polyamide material, the raw materials of which include by weight: 0.10 parts of a first color powder, 160 parts of a masterbatch, 0.20 parts of a dispersant and 0.50 parts of a functional additive, wherein the masterbatch raw materials include by weight 1000 parts of polyamide, 160 parts of an ultraviolet stabilizer and 0.20 parts of a dispersant.

[0044] A method for preparing a novel high-definition anti-blue light nylon lens comprises the following steps:

[0045] S1. Drying pretreatment of raw materials, drying temperature is 90°C, drying time is 5h;

[0046] S2, premixing polyamide, UV stabilizer and dispersant by weight and putting them into an extruder for mixing, extruding, cooling and pelletizing to prepare masterbatch; the extruder temperature is: 270-290°C, and the screw temperature is 300°C;

[0047] S3. Add the raw materials in the order of masterbatch, dispersant, first color powder and functional additives in parts by weight and mix them, then put them into an injection molding machine for mixing, ejection and injection molding to prepare a new high-definition anti-blue light nylon lens; the temperature of the injection molding machine is 255-275°C, the working temperature of the injection mold is 70-90°C, and the injection pressure is 125Pa.

[0048] The transmission spectrum of the new high-definition anti-blue light nylon lens is as follows Figure 2 shown.

[0049] Example 2

[0050] A new type of high molecular anti-blue light polyamide material, the raw materials of which include by weight: 0.10 parts of a first color powder, 160 parts of a masterbatch, 0.20 parts of a dispersant and 0.40 parts of a functional additive, wherein the masterbatch raw materials include by weight 1000 parts of polyamide, 160 parts of an ultraviolet stabilizer and 0.20 parts of a dispersant.

[0051] A method for preparing a novel high-definition anti-blue light nylon lens, wherein the specific steps are the same as those in Example 1.

[0052] The transmission spectrum of the new high-definition anti-blue light nylon lens is as follows Figure 3 shown.

[0053] Comparative Example 1

[0054] A novel high molecular weight anti-blue light polyamide material, wherein the raw materials include by weight: 0.10 parts of a first color powder, 160 parts of a masterbatch and 0.20 parts of a dispersant, wherein the masterbatch raw materials include by weight 1000 parts of polyamide, 160 parts of an ultraviolet stabilizer and 0.20 parts of a dispersant.

[0055] A method for preparing a novel high-definition anti-blue light nylon lens, wherein the specific steps are the same as those of Example 1, except that the premixing order of the raw materials in step S3 is: adding and mixing the masterbatch, the dispersant and the first color powder in the order described above.

[0056] The transmission spectrum of the new high-definition anti-blue light nylon lens is as follows Figure 4 shown.

[0057] Comparative Example 2

[0058] A new type of high molecular anti-blue light polyamide material, the raw materials of which include by weight: 0.10 parts of a first color powder, 90 parts of a masterbatch, 0.20 parts of a dispersant and 0.40 parts of a functional additive, wherein the masterbatch raw materials include by weight 1000 parts of polyamide, 160 parts of an ultraviolet stabilizer and 0.20 parts of a dispersant.

[0059] A method for preparing a novel high-definition anti-blue light nylon lens, wherein the specific steps are the same as those in Example 1.

[0060] The transmission spectrum of the new high-definition anti-blue light nylon lens is as follows Figure 5 shown.

[0061] Table 1 is a summary of the light transmittance data of the lenses of various embodiments and comparative examples.

[0062] Table 1 Summary of lens transmittance data

[0063]

[0064] From the results in Table 1, it can be seen that the lenses prepared in the embodiments and comparative examples can meet the light transmittance requirement (≥85%) and can fully ensure the clarity of vision.

[0065] Blue light transmittance (TSB) refers to the transmittance in the blue light band (380-500nm), which is usually used to measure the transmittance of eyeglass lenses to blue light. Usually, TSB needs to meet the condition of less than 75%. Table 2 shows the TSB values ​​of Example 1-2 and Comparative Example 1-2.

[0066] Table 2 TSB values ​​of lenses of various embodiments and comparative examples

[0067]

[0068] Combination Figure 2-5 As shown in Table 2, the blue light transmittance of each embodiment and comparative example meets the requirements and can achieve the anti-blue light effect to a certain extent. However, the transmittance of high-energy short-wave blue light (400-420nm) is less than 0.5%, which is also an important indicator of anti-blue light function. Among them, the transmittances of embodiments 1, 2 and comparative example 1 at 410nm are 0.4%, 0.3% and 0.1%, respectively, all less than 0.5%, while the transmittance of comparative example 2 at 410nm is 1.50%. Therefore, it can be seen from the results that the anti-high-energy short-wave blue light ability of the lens of comparative example 2 is weaker than that of the other lenses and does not meet the requirements. This is related to the fact that there are relatively few masterbatches in comparative example 2 that can effectively absorb and block high-energy short-wave blue light.

[0069] In addition, whether the transmittance at 580-590nm is greater than 70% is an important indicator for judging whether the lens is color-biased. Among them, the transmittances of the lens of Example 1 at 580nm and 590nm are 59.6% and 56% respectively, the transmittances of the lens of Example 2 at 580nm and 590nm are 69.4% and 66.8% respectively, the transmittances of the lens of Comparative Example 1 at 580nm and 590nm are 84.7% and 84.8% respectively, and the transmittances of the lens of Comparative Example 2 at 580nm and 590nm are 69.4% and 66.8% respectively. The results show that the transmittances of the lens of Comparative Example 1 at 580nm and 590nm are both greater than 70%, and the lens has a yellowing phenomenon. This shows that in the scheme of the present invention, the ultraviolet stabilizer can change the color of the lens through reasonable allocation and synergistic effect with the color powder, so that the lens does not turn yellow, enhances the visual effect and aesthetics, and can selectively absorb or reflect blue light, reduce its transmittance, and thus protect the eyes from blue light damage.

[0070] The above results show that the present invention innovatively introduces UV stabilizers into the nylon substrate to prepare masterbatches, and then accurately mixes them with color powders, successfully achieving efficient anti-blue light function of the lenses through a special process. This method abandons the traditional coating process and fundamentally solves the difficult problems of nylon lenses in terms of anti-blue light performance, optical stability, weather resistance, and processing complexity. Through precise material formula design and optimized process technology, the present invention not only ensures that the nylon lens substrate has high fidelity, high definition, and efficient anti-blue light functions, but also effectively avoids problems such as yellowing and light spots of the lenses, enabling users to obtain a more comfortable, beautiful, and clear visual experience during use.

[0071] The above describes the specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0072] In the description of the present application, it is to be understood that the word 'comprising' does not exclude the presence of elements or steps not listed in the claims. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The simple fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to improve. Any reference signs in the claims should not be construed as limiting the scope.

Claims

1. A new type of high molecular weight blue light resistant polyamide material, characterized in that: The raw materials for preparing the masterbatch include, by weight: 0.01-0.15 parts of the first color powder, 100-180 parts of the masterbatch, 0.11-0.61 parts of the dispersant and 0.20-0.80 parts of the functional additive; the raw materials for preparing the masterbatch include, by weight: 1000 parts of polyamide, 140-180 parts of the ultraviolet stabilizer and 0.11-0.61 parts of the dispersant.

2. The novel high molecular weight blue light resistant polyamide material according to claim 1, characterized in that: The dispersant includes vinyl bisstearamide.

3. The novel high molecular weight blue light resistant polyamide material according to claim 1, characterized in that: The functional additive includes a second color powder.

4. A new type of high-definition anti-blue light nylon lens, characterized in that: The method is made of the novel high molecular weight blue light resistant polyamide material as described in any one of claims 1 to 3.

5. A method for preparing the new high-definition anti-blue light nylon lens as claimed in claim 4, characterized in that: The steps include: S1, drying pretreatment of raw materials; S2, premixing the polyamide, the UV stabilizer and the dispersant by weight, and then putting them into an extruder for mixing, extruding, cooling and pelletizing to prepare the masterbatch; the working temperature of the extruder is 270-290° C.; S3. Add the raw materials in the order of the masterbatch, the dispersant, the first color powder and the functional additive in parts by weight for premixing, and then put them into an injection molding machine for mixing, ejection and injection molding to prepare the new high-definition anti-blue light nylon lens; the working temperature of the injection molding machine is 255-285°C, the working temperature of the injection mold is 70-90°C, and the injection pressure is 80-130Pa.

6. The method for preparing the new high-definition anti-blue light nylon lens according to claim 5, characterized in that: Also included is S4, which has surface treatment and optical processing for the new high-definition anti-blue light nylon lens.

7. The method for preparing the novel high-definition anti-blue light nylon lens according to claim 5, characterized in that: In S1, the drying temperature is 90-100° C. and the drying time is 5-6 hours.

8. The method for preparing the new high-definition anti-blue light nylon lens according to claim 5, characterized in that: The screw temperature of the extruder is 290-310°C.

9. The method for preparing the novel high-definition anti-blue light nylon lens according to claim 5, characterized in that: In S2, the diameter of the masterbatch is 2-4 mm.

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