A nano-modified eyeglass lens packaging material and its application

Abstract

The present invention discloses a nano-modified eyeglass wipe packaging material and its application, which belongs to the intersection of environmentally friendly packaging material technology and nano-composite materials. It adopts a multi-layer composite structure. First, polylactic acid is melted in a twin-screw extruder and then injection-molded into a polylactic acid film. Nano-silica modified with a silane coupling agent is mixed with a sodium polyacrylate dispersant and evenly coated on the surface of the polylactic acid film by electrostatic spraying or roller coating to obtain a modified nano-silica-coated polylactic acid film; finally, a nanofiber membrane is bonded to the modified nano-silica-coated polylactic acid film. This structure achieves high barrier properties, excellent mechanical properties and high light transmittance. By optimizing the material ratio and process parameters, the wet heat stability and printing adhesion are significantly improved, effectively overcoming the defects of traditional paper aluminum plastic packaging in resource recovery, low-carbon manufacturing and food safety. It is suitable for single-piece independently packaged eyeglass wipes.

Description

Technical Field

[0001] The present invention belongs to the intersection of environmentally friendly packaging material technology and nanocomposite materials, and specifically relates to a preparation process of a multi-layer composite packaging material based on a single environmentally friendly material, which is suitable for degradable eyeglass lens packaging materials. Background Art

[0002] In recent years, the rapid growth of the eyeglass wipe market has placed higher demands on the performance of packaging materials. Currently, the most widely used packaging structure is a composite of paper, aluminum, and plastic. The key advantage of this multi-layered, heterogeneous composite structure lies in its excellent barrier properties, effectively protecting against moisture and oxygen, while also possessing excellent mechanical strength, protecting the product from environmental influences during transportation and storage. As such, this packaging technology possesses significant market competitiveness and technical advantages in meeting product protection requirements.

[0003] However, with growing global environmental awareness and the growing popularity of low-carbon economies and sustainable development, this traditional composite packaging technology has exposed a series of shortcomings that need to be addressed. First, the significant differences in the physical properties of paper, aluminum, and plastic make efficient separation difficult during recycling, resulting in high costs and a global recycling rate of less than 15% for composite packaging materials. This low recycling rate not only wastes significant resources but also increases the environmental burden. Second, while the aluminum layer used in packaging possesses excellent barrier properties, its mining and processing consumes significant energy. Statistics show that carbon emissions can reach 12 tons per ton of aluminum produced, which is contrary to the current global goals of promoting a low-carbon economy and reducing greenhouse gas emissions. Furthermore, the plastic layer in packaging is often made of non-biodegradable materials such as polyethylene and polypropylene. These materials are difficult to decompose after use and remain in the environment for a long time, further exacerbating the problem of white pollution. This is particularly prominent in emerging markets, where plastic consumption has exceeded 9 million tons per year, and the resulting environmental pollution is particularly severe.

[0004] Another issue that shouldn't be overlooked is that traditional multi-layer lamination processes typically rely on chemical adhesives, such as polyurethane. These adhesives often contain residual solvents during their preparation. This residual solvent poses a risk of migration into the wipes, potentially compromising the safety of eyeglass wipes. This potential food safety risk is particularly concerning for products that come into direct contact with human skin.

[0005] In this context, it is particularly urgent to develop a new packaging material that can not only meet the barrier and mechanical strength requirements of eyeglass wipe packaging, but also has significant advantages in environmental protection and resource recycling. The introduction of nano-modification technology provides an effective way to improve material performance. Through nano-modification of a single environmentally friendly substrate, it is possible to achieve a barrier effect similar to or even better than that of a traditional paper / aluminum / plastic composite structure without introducing multiple substances, while also improving the mechanical strength and durability of the material. Due to their small particle size and large specific surface area, nanomaterials can significantly improve the substrate's anti-permeability and anti-aging properties during material modification, which provides technical support for the development of new eyeglass wipe packaging materials.

[0006] From a process perspective, nano-modification preparation technology avoids the multi-layer structures and chemical adhesives required in traditional composite processes, fundamentally eliminating food safety risks caused by residual solvents. It also simplifies the production process of packaging materials and reduces energy and resource consumption during the production process. Compared to traditional composite structures, packaging materials using a single substrate that has undergone nano-modification are not only easier to recycle but also have a lower environmental impact throughout their life cycle, contributing to the recycling of resources and fundamental improvements in environmental pollution.

[0007] Furthermore, considering the increasingly stringent global demand for low-carbon and environmentally friendly packaging, developing a new packaging material with high barrier properties, excellent mechanical properties, easy recycling, and environmental friendliness not only aligns with the green development trend of the international market but also provides a competitive advantage in the fierce market. Through an in-depth analysis of the defects of traditional paper, aluminum, and plastic composite materials, combined with the latest advances in nano-modification technology, this patent aims to provide a packaging material for eyeglass wipes that balances environmental protection and high performance, and a method for its preparation. This method eliminates the use of potentially environmentally harmful chemical adhesives during the production process and also avoids the drawback of the difficulty of recycling multi-layer heterogeneous composite materials.

[0008] In summary, although the commonly used eyeglass wipe packaging materials on the market have certain advantages in terms of moisture resistance, oxygen resistance and mechanical strength, they have obvious deficiencies in resource recovery, low-carbon manufacturing, environmental pollution and food safety. The application of nano-modification technology provides an innovative approach to solving the above problems. Its core lies in the functional modification of a single environmentally friendly substrate to achieve the preparation of high-performance packaging materials, thereby meeting the urgent needs of modern packaging technology in terms of environmental protection and sustainable development. The present invention provides a nano-modified eyeglass wipe packaging material and its application, which has important innovative significance and application prospects in technology, and provides a new idea and method for solving key problems in the existing technology. Summary of the Invention

[0009] A nano-modified eyeglass lens packaging material comprises the following raw materials in parts by weight:

[0010] Polylactic acid: 9-36 parts,

[0011] Surface modified nano-silica: 9-12 parts,

[0012] Sodium polyacrylate dispersant: 9-36 parts,

[0013] Plasma-treated nanofiber membrane: 1-3 parts;

[0014] The preparation method of surface-modified nano-silica is as follows: the nano-silica is modified with a silane coupling agent KH550 or KH570, and ultrasonically dispersed in anhydrous ethanol for 30-60 minutes, the coupling agent addition amount is 1-5% of the mass of the nanoparticles, and the reaction temperature is 50-70°C; the preparation method of the plasma-treated nanofiber membrane is as follows: it is prepared by electrospinning, the spinning solution contains 5-10 wt% polylactic acid solution, the spinning voltage is 15-25 kV, the receiving distance is 10-20 cm, and the fiber diameter is 100-500 nm. The fiber membrane is placed in a chamber, ultrasonically cleaned with ethanol for 5-10 minutes and dried; modified with argon / nitrogen mixed gas with a volume ratio of 3:1, a gas pressure of 20-30 kPa, a power of 80-100 W, and a time of 1-15 minutes; post-treatment is performed by rinsing with ethanol / water 3-5 times, vacuum drying at 40°C for 2 hours, and then sealed and stored.

[0015] A nano-modified eyeglass lens packaging material comprises the following raw materials in parts by weight:

[0016] Polylactic acid: 15-30 parts,

[0017] Surface modified nano-silica: 9-12 parts,

[0018] Sodium polyacrylate dispersant: 18-36 parts,

[0019] Plasma-treated nanofiber membrane: 1-3 parts;

[0020] The preparation method of surface-modified nano-silica is as follows: nano-silica is modified with silane coupling agent KH550 and ultrasonically dispersed in anhydrous ethanol for 35-45 minutes, the coupling agent addition amount is 2-5% of the mass of the nanoparticles, and the reaction temperature is 55-65°C; the preparation method of plasma-treated nanofiber membrane is as follows: it is prepared by electrospinning, the spinning solution contains 6-9wt% polylactic acid solution, the spinning voltage is 20-25 kV, the receiving distance is 15-20 cm, the fiber diameter is 400-500 nm, the fiber membrane is placed in a chamber, ultrasonically cleaned with ethanol for 7-9 minutes and dried; modified with argon / nitrogen mixed gas with a volume ratio of 3:1, a gas pressure of 25-30 kPa, a power of 90-100 W, and a time of 10-15 minutes; post-treatment is rinsed with ethanol / water 4-5 times, vacuum dried at 40°C for 2 hours, and then sealed and stored.

[0021] A nano-modified eyeglass lens packaging material comprises the following raw materials in parts by weight:

[0022] Polylactic acid: 18 parts,

[0023] Surface modified nano-silica: 12 parts,

[0024] Sodium polyacrylate dispersant: 24 parts,

[0025] Plasma-treated nanofiber membrane: 2 parts;

[0026] The preparation method of surface-modified nano-silica is as follows: nano-silica is modified with silane coupling agent KH550 and ultrasonically dispersed in anhydrous ethanol for 40 minutes. The coupling agent addition amount is 3% of the mass of the nanoparticles, and the reaction temperature is 60°C. The preparation method of plasma-treated nanofiber membrane is as follows: it is prepared by electrospinning, the spinning solution contains 8 wt% polylactic acid solution, the spinning voltage is 20 kV, the receiving distance is 15 cm, the fiber diameter is 300 nm, the fiber membrane is placed in a chamber, ultrasonically cleaned with ethanol for 8 minutes and dried; it is modified with argon / nitrogen mixed gas with a volume ratio of 3:1, a gas pressure of 25 kPa, a power of 90 W, and a time of 8 minutes; after post-treatment, it is rinsed with ethanol / water 4 times, vacuum-dried at 40°C for 2 hours, and then sealed and stored.

[0027] A nano-modified eyeglass lens packaging material, preferably:

[0028] The CAS number of polylactic acid is 26100-51-6, Mw 60000, purchased from Shanghai Bid Pharmaceutical Technology Co., Ltd.

[0029] The CAS number of nano-silica is 7631-86-9, Mw is 60.08, and the particle size is 10-50 nm. It was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.

[0030] The sodium polyacrylate dispersant has a CAS number of 9003-04-7 and a Mw of 10,000–100,000 and was purchased from Shanghai Bid Pharmaceutical Technology Co., Ltd.

[0031] A nano-modified spectacles wipe packaging material and a preparation method of the spectacles wipe packaging material comprise the following steps:

[0032] (1) Melting polylactic acid in a twin-screw extruder and then injection molding it into a polylactic acid film;

[0033] (2) mixing nano-silica modified with silane coupling agent KH550 or KH570 with sodium polyacrylate dispersant, and uniformly coating the nano-silica on the surface of the polylactic acid film by electrostatic spraying or roller coating to obtain a polylactic acid film coated with modified nano-silica;

[0034] (3) Activating the plasma-treated nanofiber membrane under argon protection, and bonding the nanofiber membrane to the modified nano-silica-coated polylactic acid film by combining a hot pressing process.

[0035] A nano-modified eyeglass lens packaging material, preferably:

[0036] Parameters for melting polylactic acid in a twin-screw extruder in step (1):

[0037] Temperature 160-180℃, rotation speed 80-120 rpm.

[0038] A nano-modified eyeglass lens packaging material, preferably:

[0039] Parameters of the hot pressing process in step (3):

[0040] Power 50-100 W, time 30-90 s, pressure 5-10 MPa, temperature 80-100 °C.

[0041] A nano-modified eyeglass lens packaging material has a total thickness of 0.1-0.3 mm, a tensile strength of 35 MPa or greater, and an elongation at break of 20% or greater.

[0042] The invention discloses an application of a nano-modified eyeglass wipe packaging material in eye wipe packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 The polylactic acid film coated with modified nano-silica prepared in Example 1.

[0044] Figure 2 The nanofiber membrane treated with plasma prepared in Example 1 is bonded to the modified nano-silica coated polylactic acid film. DETAILED DESCRIPTION Example 1

[0045] A nano-modified eyeglass lens packaging material, comprising the following raw materials, in parts by weight: polylactic acid: 36 parts,

[0046] Surface modified nano-silica: 12 parts, sodium polyacrylate dispersant: 36 parts, plasma-treated nanofiber membrane: 3 parts.

[0047] The preparation method of the packaging material for eyeglass wipes comprises the following steps:

[0048] (1) PLA was melted in a twin-screw extruder and then injection molded into PLA film at 180°C and 120 rpm.

[0049] (2) First, nano-silica and silane coupling agent KH570 were ultrasonically dispersed in anhydrous ethanol for 60 minutes at a reaction temperature of 70°C to obtain nano-silica modified with silane coupling agent KH570. The modified nano-silica was mixed with sodium polyacrylate dispersant and evenly coated on the surface of the polylactic acid film by roller coating to obtain a polylactic acid film coated with modified nano-silica ( Figure 1 );

[0050] (3) First, a spinning solution containing 5 wt% polylactic acid solution was electrospun to prepare a nanofiber membrane, wherein the spinning voltage was 15 kV, the receiving distance was 10 cm, and the fiber diameter was 100 nm; the fiber membrane was placed in a chamber, ultrasonically cleaned with ethanol for 5 minutes and dried; modified with argon / nitrogen mixed gas with a volume ratio of 3:1, a gas pressure of 20 kPa, a power of 80 W, and a time of 1 minute; post-processed with ethanol / water rinsed 3 times, vacuum dried at 40 ° C for 2 hours, and sealed for storage; the plasma-treated nanofiber membrane was activated under argon protection with a power of 50 W and a time of 30 s, combined with a hot pressing process pressure of 5 MPa, and the plasma-treated nanofiber membrane was bonded to the modified nano-silica-coated polylactic acid film at a temperature of 80 ° C ( Figure 2 ).

[0051] After undergoing these processes, the resulting composite packaging material achieves a tensile strength of 38 MPa and an elongation at break of 22%. Its light transmittance is 88%, and its water vapor transmission rate is controlled at 4.8 g / m²·day. In a 180-day biodegradation test, the material achieved a degradation rate of 93%. In a humid and hot environment at 40°C, the material's performance retention rate reached 96%, fully demonstrating its excellent overall performance. Example 2

[0052] A method for preparing a nano-modified eyeglass lens packaging material comprises the following raw materials, measured in parts by weight: 18 parts of polylactic acid, 12 parts of surface-modified nano-silica, 24 parts of a sodium polyacrylate dispersant, and 2 parts of a plasma-treated nanofiber membrane.

[0053] The preparation method of the packaging material for eyeglass wipes comprises the following steps

[0054] (1) Polylactic acid was melted in a twin-screw extruder and then injection molded into a polylactic acid film at 160°C and a rotation speed of 80 rpm.

[0055] (2) First, nano-silica and silane coupling agent KH550 are ultrasonically dispersed in anhydrous ethanol for 30-60 minutes at a reaction temperature of 70°C to obtain nano-silica modified with silane coupling agent KH550, and the modified nano-silica is mixed with sodium polyacrylate dispersant, and the modified nano-silica is evenly coated on the surface of the polylactic acid film by electrostatic spraying to obtain a polylactic acid film coated with modified nano-silica;

[0056] (3) First, a spinning solution containing 5 wt% polylactic acid solution was used to prepare a nanofiber membrane by electrospinning, wherein the spinning voltage was 15 kV, the receiving distance was 10 cm, and the fiber diameter was 100 nm; the fiber membrane was placed in a chamber, ultrasonically cleaned with ethanol for 10 minutes and dried; modified with argon / nitrogen mixed gas with a volume ratio of 3:1, a gas pressure of 30 kPa, a power of 100 W, and a time of 15 minutes; post-processed with ethanol / water rinse 5 times, vacuum dried at 40°C for 2 hours, and then sealed and stored, and the plasma-treated nanofiber membrane was activated under argon protection with a power of 100 W and a time of 90 s combined with a hot pressing process pressure of 10 MPa, and the plasma-treated nanofiber membrane was bonded to the modified nano-silica-coated polylactic acid film at a temperature of 100°C.

[0057] After undergoing these processes, the resulting composite packaging material achieves a tensile strength of 35 MPa and an elongation at break of 20%. Its light transmittance is 80%, and its water vapor transmission rate is controlled at 4.4 g / m²·day. In a 180-day biodegradation test, the material achieved a degradation rate of 90%. In a humid and hot environment at 40°C, the material's performance retention reached 96%, fully demonstrating its excellent overall performance. Example 3

[0058] A nano-modified eyeglass lens packaging material, comprising the following raw materials, in parts by weight: polylactic acid: 9 parts,

[0059] Surface modified nano-silica: 9 parts, sodium polyacrylate dispersant: 9 parts, plasma treated nanofiber membrane: 1 part.

[0060] This embodiment proposes an ultra-thin design with a total thickness of only 0.1 mm. In the specific design, the polylactic acid film is only 0.05 mm, the modified nano-silica-coated polylactic acid film still maintains a thickness of 5 μm, and the plasma-treated nanofiber membrane is significantly increased to 45 μm after being bonded to the modified nano-silica-coated polylactic acid film. After processing, the resulting packaging material has a tensile strength of 36 MPa and a light transmittance of 90%, which is particularly suitable for ultra-thin wipe packaging with extremely stringent thickness requirements, such as contact lens packaging. This design fully utilizes the application advantages of nanotechnology in film materials to ensure that good mechanical strength and barrier properties can still be achieved under ultra-thin design. Example 4

[0061] In this example, to further enhance the light transmittance of the packaging material while maintaining a barrier effect, the plasma-treated nanofiber membrane process was optimized. Specifically, the nanofiber membrane was prepared using an electrospinning method, with a spinning solution concentration set at 8 wt% and a receiving distance extended to 20 cm to achieve a more detailed fiber distribution. Through process optimization, the fiber diameter was controlled to approximately 100 nm, the porosity increased to 50%, and the light transmittance reached 92%. Tests showed that the barrier layer after this treatment had an oxygen transmission rate of only 8 cm³ / m²·day, while the overall composite material had a light transmittance of 91%, demonstrating a superior light-transmitting barrier effect compared to traditional processes, making it suitable for packaging applications requiring high optical transparency. Example 5

[0062] This embodiment adopts a low-temperature composite process. During the composite process of the plasma-treated nanofiber membrane and the modified nano-silica-coated polylactic acid film, the hot pressing temperature is controlled at 80°C and the pressure is appropriately increased to 10 MPa. This low-temperature composite process not only effectively reduces the energy consumption in the material production process, but also makes the peel strength of the composite material reach 2.3 N / mm and ensures that the transmittance is maintained at 87%. This process is particularly suitable for temperature-sensitive substrates and functional layer materials, and helps to achieve a low-energy, low-cost production process while ensuring bonding strength. Example 6

[0063] In this example, for specialized applications such as outdoor use or packaging requiring high UV protection, large-particle modified nanosilica with a particle size of 50 nm and a specific surface area of ​​310 m² / g was selected. By adjusting the composite formula of the modified nanosilica-coated polylactic acid film, the layer not only effectively blocks moisture and oxygen but also achieves excellent UV shielding. Test results show a UV shielding rate of up to 99%. This design not only provides protection for outdoor wipe packaging but also plays a positive role in preventing UV aging and related product quality degradation, meeting the multi-performance requirements of packaging materials in specialized environments. Example 7

[0064] The materials synthesized in Examples 1-6 have been successfully used to package individual anti-fog eyeglass wipes. The packaging is 8×8 cm per wipe, and after opening, the wipes can be used directly to wipe lenses. After six months of soil burial testing, the packaging showed a mass loss rate of 85%, in line with green packaging trends.

[0065] Comparative Example 1

[0066] Traditional paper-aluminum-plastic composite film consists of paper, aluminum foil, and polyethylene, with the paper layer approximately 40 μm thick, the aluminum foil approximately 9 μm, and the polyethylene layer approximately 50 μm. While this structure exhibits good barrier properties, efficient separation between the different materials is difficult to achieve, resulting in high recycling costs. Furthermore, its tensile strength is only 28 MPa, and the overall structure is non-degradable, with a light transmittance of 0%. This fails to meet the environmental, biodegradability, and high light transmittance requirements of modern packaging.

[0067] Comparative Example 2

[0068] In a comparative experiment, nano-SiO2 that had not been modified with a silane coupling agent was used as a functional layer component. Due to its tendency to agglomerate, the coating thickness distribution was uneven, with an actual thickness range of 5-30 μm and an unstable overall transmittance of only 72%. In mechanical performance tests of this structure after composite coating, its tensile strength was only 28 MPa, demonstrating a significant performance disadvantage. This demonstrates the importance of modification for uniform dispersion of nano-SiO2 and improving the performance of the composite layer.

[0069] Comparative Example 3

[0070] Another comparative solution uses traditional chemical adhesives (such as polyurethane) for lamination. However, this process can easily leave residual solvents in the barrier layer. Test results show that the packaging material produced using this method has a peel strength of only 1.8 N / mm, a residual solvent content of up to 120 ppm, and a biodegradability rate of only 65%. This low degradation rate and potential food safety risks clearly demonstrate the shortcomings of traditional adhesive processes in the areas of environmentally friendly and high-performance packaging.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the implementation process and features of the present invention, rather than to limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that the present invention can still be modified or replaced by equivalents, and any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A nano-modified eyeglass lens packaging material, characterized in that: In parts by weight, it includes the following raw materials: Polylactic acid: 9-36 parts, Surface modified nano-silica: 9-12 parts, Sodium polyacrylate dispersant: 9-36 parts, Plasma-treated nanofiber membrane: 1-3 parts; The surface-modified nano-silica is prepared by the following method: the nano-silica is modified with a silane coupling agent KH550 or KH570, and ultrasonically dispersed in anhydrous ethanol for 30-60 minutes, the coupling agent is added in an amount of 1-5% of the mass of the nanoparticles, and the reaction temperature is 50-70°C. The plasma-treated nanofiber membrane is prepared by the following method: the spinning solution contains 5-10 wt% polylactic acid solution, the spinning voltage is 15-25 kV, the receiving distance is 10-20 cm, and the fiber diameter is 100-500 nm. The fiber membrane is placed in a chamber, ultrasonically cleaned with ethanol for 5-10 minutes and dried; the membrane is modified with an argon / nitrogen mixed gas with a volume ratio of 3:1, a gas pressure of 20-30 kPa, a power of 80-100 W, and a time of 1-15 minutes; the membrane is post-treated by rinsing with ethanol / water 3-5 times, vacuum drying at 40°C for 2 hours, and then sealed and stored. The preparation method of the spectacles wipe packaging material comprises the following steps: (1) Melting polylactic acid in a twin-screw extruder and then injection molding it into a polylactic acid film; (2) mixing nano-silica modified with silane coupling agent KH550 or KH570 with sodium polyacrylate dispersant, and uniformly coating the nano-silica on the surface of the polylactic acid film by electrostatic spraying or roller coating to obtain a polylactic acid film coated with modified nano-silica; (3) Activating the plasma-treated nanofiber membrane under argon protection, and bonding the nanofiber membrane to the modified nano-silica-coated polylactic acid film by combining a hot pressing process to form a three-layer composite structure.

2. The nano-modified eyeglass wipe packaging material according to claim 1, characterized in that: In parts by weight, it includes the following raw materials: Polylactic acid: 15-30 parts, Surface modified nano-silica: 9-12 parts, Sodium polyacrylate dispersant: 18-36 parts, Plasma-treated nanofiber membrane: 1-3 parts; The preparation method of surface-modified nano-silica is as follows: nano-silica is modified with silane coupling agent KH550 and ultrasonically dispersed in anhydrous ethanol for 35-45 minutes, the coupling agent addition amount is 2-5% of the mass of the nanoparticles, and the reaction temperature is 55-65°C; the preparation method of plasma-treated nanofiber membrane is as follows: it is prepared by electrospinning, the spinning solution contains 6-9 wt% polylactic acid solution, the spinning voltage is 20-25 kV, the receiving distance is 15-20 cm, the fiber diameter is 400-500 nm, the fiber membrane is placed in a chamber, ultrasonically cleaned with ethanol for 7-9 minutes and dried; modified with argon / nitrogen mixed gas with a volume ratio of 3:1, a gas pressure of 25-30 kPa, a power of 90-100 W, and a time of 10-15 minutes; post-treatment is rinsed with ethanol / water 4-5 times, vacuum dried at 40°C for 2 hours, and then sealed and stored.

3. The nano-modified eyeglass wipe packaging material according to claim 1, characterized in that: In parts by weight, it includes the following raw materials: Polylactic acid: 18 parts, Surface modified nano-silica: 12 parts, Sodium polyacrylate dispersant: 24 parts, Plasma-treated nanofiber membrane: 2 parts; The preparation method of surface-modified nano-silica is as follows: nano-silica is modified with silane coupling agent KH550 and ultrasonically dispersed in anhydrous ethanol for 40 minutes. The coupling agent addition amount is 3% of the mass of the nanoparticles, and the reaction temperature is 60°C. The preparation method of plasma-treated nanofiber membrane is as follows: it is prepared by electrospinning, the spinning solution contains 8 wt% polylactic acid solution, the spinning voltage is 20 kV, the receiving distance is 15 cm, the fiber diameter is 300 nm, the fiber membrane is placed in a chamber, ultrasonically cleaned with ethanol for 8 minutes and dried; modified with argon / nitrogen mixed gas with a volume ratio of 3:1, a gas pressure of 25 kPa, a power of 90 W, and a time of 8 minutes; post-treatment is rinsed with ethanol / water 4 times, vacuum dried at 40°C for 2 hours, and then sealed and stored.

4. The nano-modified eyeglass wipe packaging material according to claim 1, characterized in that: Parameters for melting polylactic acid in a twin-screw extruder in step (1): Temperature 160-180℃, rotation speed 80-120 rpm.

5. The nano-modified eyeglass wipe packaging material according to claim 1, characterized in that: Parameters of the hot pressing process in step (3): Power 50-100 W, time 30-90 s, pressure 5-10 MPa, temperature 80-100 °C.

6. The nano-modified eyeglass wipe packaging material according to claim 1, characterized in that: The total thickness of the material is 0.1-0.3 mm, the tensile strength is ≥35 MPa, and the elongation at break is ≥20%.

7. Use of the nano-modified eyeglass wipe packaging material according to claim 1 in eye wipe packaging.

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