Environmentally friendly matte touch film and production method thereof

Abstract

The present application discloses a method for producing an environmentally friendly matte touch film, which relates to the technical field of packaging materials and comprises the following steps: S1. preparing polyethylene particles wrapped by cycloolefin copolymers; specifically, adding polyethylene particles into a cycloolefin solution, stirring evenly, and heating, so that the cycloolefin copolymer forms a uniform wrapping layer on the surface of the polyethylene particles; S2. preparing a film body by multi-layer co-extrusion blown film; S3. stretching and electron beam irradiating the film body; S4. corona treating the film body; S5. winding; the uniformity and quality of the film body can be improved, the uncertainty and complexity in the production process can be reduced, and the production stability can be improved.

Description

Technical Field

[0001] The invention relates to the field of packaging materials, and in particular to an environmentally friendly matte touch film and a production method thereof. Background Art

[0002] The touch film, also called soft-touch film, is a special matte BOPP film for lamination with a special velvety smooth and delicate touch. It is mainly achieved by coating the surface of the film with touch oil. It can be used for luxury goods packaging, high-end book and magazine packaging, high-end hang tags, etc.

[0003] The invention patent with the Chinese patent announcement number CN114368208B discloses a matte film, including a film body, which at least includes a first matte layer, a core layer and a second matte layer stacked in sequence, the first matte layer and the second matte layer at least contain polyethylene and cycloolefin copolymer, and the core layer at least contains polyethylene; the total thickness of the film body is 20-40μm; the present invention also provides a production method for the above matte film. Compared with the prior art, the matte film of the present invention has a simple component structure, excellent performance, and is easy to recycle; the production method of the present invention can produce high-quality matte films.

[0004] Although the above method can improve the quality of the matte film and facilitate recycling, the temperature difference of 10°C is difficult to control in the actual factory production environment, is greatly affected by environmental factors, has high production difficulty, and has great production instability. Summary of the invention

[0005] The embodiments of the present application provide an environmentally friendly matte tactile film and a production method thereof, thereby solving the problems in the prior art of difficult temperature control, high production difficulty and high production instability, improving the uniformity and quality of the film, reducing the uncertainty and complexity of the production process, and improving production stability.

[0006] The present application provides a method for producing an environmentally friendly matte touch film, which specifically includes the following steps:

[0007] S1. Preparation of polyethylene particles coated with cyclic olefin copolymer;

[0008] Specifically, polyethylene particles are added into the cycloolefin solution, stirred evenly, and heated to make the cycloolefin copolymer form a uniform coating layer on the surface of the polyethylene particles, thereby obtaining;

[0009] S2. Preparing a film body by multi-layer co-extrusion blown film;

[0010] S3. stretching the film and irradiating it with an electron beam;

[0011] S4. performing corona treatment on the film;

[0012] S5. Roll up.

[0013] Furthermore, in step S1, the particle size of the polyethylene particles is 2-8 μm; and the content of the cycloolefin copolymer is 30-70%.

[0014] Furthermore, in step S2, the film body comprises a laminated inner layer, a middle layer and an outer layer, the inner layer and the outer layer comprise polyethylene particles wrapped by cycloolefin copolymer, and the middle layer comprises polyethylene; the total thickness of the film body is 20-40 μm.

[0015] Furthermore, in step S3, the stretching treatment temperature is 65-85°C, the stretching treatment time is 0.5-10 min; the stretching treatment is carried out on a stretching roller with negative pressure adsorption, and the negative pressure on the stretching roller is 110-140 mbar; the radiation amount of electron beam irradiation per square meter of the film is 10-12 mrad.

[0016] Furthermore, in step S2, the middle layer of the membrane body includes polyethylene particles wrapped by cycloolefin copolymer.

[0017] Furthermore, the thickness of the middle layer of the membrane accounts for 40-70% of the total thickness of the membrane, and the mass fraction of the cyclic olefin copolymer in the middle layer of the membrane is 10-30%; the thickness of the outer layer and the inner layer of the membrane both account for 15-30% of the total thickness of the membrane, and the mass fraction of the cyclic olefin copolymer in the outer and inner layers is 30-70%.

[0018] Furthermore, the particle size of the polyethylene in the polyethylene particles wrapped by the cyclic olefin copolymer in the outer layer of the membrane body is 2-4μm, and the mass fraction of the polyethylene particles is 20-50%, the particle size of the polyethylene in the polyethylene particles wrapped by the cyclic olefin copolymer in the middle layer of the membrane body is 3-6μm, and the mass fraction of the polyethylene particles is 60-90%, and the particle size of the polyethylene in the polyethylene particles wrapped by the cyclic olefin copolymer in the outer layer of the membrane body is 5-8μm, and the mass fraction of the polyethylene particles is 20-50%.

[0019] Furthermore, the polyethylene of the polyethylene particles wrapped by the copolymer in the inner layer, middle layer and outer layer of the membrane body is any combination of high molecular weight polyethylene, medium molecular weight polyethylene and low molecular weight polyethylene.

[0020] Furthermore, the molecular weight of the polyethylene is divided into high molecular weight 200,000-500,000 g / mol, medium molecular weight 50,000-200,000 g / mol, and low molecular weight 10,000-50,000 g / mol.

[0021] An environmentally friendly matte touch film is prepared by the production method.

[0022] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0023] Cyclic olefin copolymer has low surface energy and small surface tension. After the polyethylene particles are wrapped with cyclic olefin copolymer, the mutual attraction between particles can be reduced, the particle agglomeration can be reduced, and thus the dispersion of polyethylene particles can be improved. In the subsequent film-forming process, the particles can be more evenly distributed in the film body, thereby improving the uniformity and quality of the film body. The wrapping layer can also enhance the compatibility between polyethylene and cyclic olefin copolymer, reduce the interfacial tension, and enable the two to be better combined to form a more stable matte touch film structure.

[0024] The use of cycloolefin copolymer to wrap polyethylene particles can simplify the production process. Since the polyethylene particles remain in a solid state during the stretching process, the glass transition temperature of the outer and inner cycloolefin copolymers can be selected to be a fixed temperature. Therefore, it is only necessary to control the stretching film forming time to control the quality and matte degree of the film, thereby significantly reducing the uncertainty and complexity of the production process, being able to more accurately control the thickness and uniformity of the film, improving production efficiency and operability, and improving the controllability and adjustability of the matte touch film.

[0025] The membrane prepared by this scheme can be recycled and reused after the service life of the membrane ends, thereby reducing the generation of waste and reducing the impact on the environment. The recycled materials can be processed and reused to produce new membranes or other plastic products, thus realizing the recycling of resources.

[0026] Compared with the need to stretch the temperature at 10°C below the higher temperature of the glass transition temperature of the cycloolefin copolymer and the melting point of the polyethylene, the temperature is difficult to control in the actual factory production environment, and is greatly affected by the environment and the outside world, which is not conducive to actual production and has extremely high production instability. The polyethylene particles wrapped in the cycloolefin copolymer used in the present application can control the time within the range determined by the temperature, reducing the impact of the environment and other external factors on the production of the environmentally friendly matte tactile film, and improving the stability and controllability of production. DETAILED DESCRIPTION

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] Embodiment 1: The present application provides a method for producing an environmentally friendly matte touch film, which specifically comprises the following steps:

[0029] S1. Preparation of polyethylene particles coated with cyclic olefin copolymer;

[0030] Specifically, polyethylene particles are added to a cycloolefin solution, stirred evenly, and heated to form a uniform coating layer of the cycloolefin copolymer on the surface of the polyethylene particles, wherein the particle size of the polyethylene particles is 2-8 μm; and the content of the cycloolefin copolymer is 30-70%;

[0031] S2. Preparing a film body by multi-layer co-extrusion blown film;

[0032] The film body comprises a laminated inner layer, a middle layer and an outer layer, the inner layer and the outer layer comprise polyethylene particles wrapped by cycloolefin copolymer, and the middle layer comprises polyethylene; the total thickness of the film body is 20-40 μm;

[0033] S3. stretching the film and irradiating it with an electron beam;

[0034] The stretching treatment temperature is 65-85°C, the stretching treatment time is 0.5-10 minutes, the stretching treatment is carried out on a stretching roller with negative pressure adsorption, and the negative pressure on the stretching roller is 110-140 mbar; the radiation amount of electron beam irradiation per square meter of the film body is 10-12 mrad;

[0035] S4. performing corona treatment on the film;

[0036] S5. Roll up.

[0037] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0038] Cyclic olefin copolymer has low surface energy and small surface tension. After the polyethylene particles are wrapped with cyclic olefin copolymer, the mutual attraction between particles can be reduced, the particle agglomeration can be reduced, and thus the dispersion of polyethylene particles can be improved. In the subsequent film-forming process, the particles can be more evenly distributed in the film body, thereby improving the uniformity and quality of the film body. The wrapping layer can also enhance the compatibility between polyethylene and cyclic olefin copolymer, reduce the interfacial tension, and enable the two to be better combined to form a more stable matte touch film structure.

[0039] The use of cycloolefin copolymer to wrap polyethylene particles can simplify the production process. Since the polyethylene particles remain in a solid state during the stretching process, the glass transition temperature of the outer and inner cycloolefin copolymers can be selected to be a fixed temperature. Therefore, it is only necessary to control the stretching film forming time to control the quality and matte degree of the film, thereby significantly reducing the uncertainty and complexity of the production process, being able to more accurately control the thickness and uniformity of the film, improving production efficiency and operability, and improving the controllability and adjustability of the matte touch film.

[0040] The membrane prepared by this scheme can be recycled and reused after the service life of the membrane ends, thereby reducing the generation of waste and reducing the impact on the environment. The recycled materials can be processed and reused to produce new membranes or other plastic products, thus realizing the recycling of resources.

[0041] A matte film with publication number CN114368208B needs to be stretched at 10°C below the higher temperature of the glass transition temperature of the cycloolefin copolymer and the melting point of the polyethylene. In the actual factory production environment, the temperature is difficult to control and is greatly affected by the environment and the outside world, which is not conducive to actual production and has high production instability. Compared with the above-mentioned matte film, the polyethylene particles wrapped with the cycloolefin copolymer can control the time within the range determined by the temperature, reducing the impact of the environment and other external factors on the production of the environmentally friendly matte tactile film, and improving the stability and controllability of the production.

[0042] Example 2: The above-mentioned Example 1 uses polyethylene particles wrapped with cycloolefin copolymer as the inner and outer layers of the film body, and forms a matte tactile film structure by controlling the stretching time, thereby improving the stability and quality of the production of the environmentally friendly matte tactile film. In order to further improve the quality of the environmentally friendly matte tactile film, further optimization is made on the basis of Example 1.

[0043] In step S2, the middle layer of the film body includes polyethylene particles wrapped by cyclic olefin copolymer;

[0044] The thickness of the middle layer of the membrane accounts for 40-70% of the total thickness of the membrane, and the mass fraction of the cyclic olefin copolymer in the middle layer of the membrane is 10-30%; the thickness of the outer and inner layers of the membrane both account for 15-30% of the total thickness of the membrane, and the mass fraction of the cyclic olefin copolymer in the outer and inner layers is 30-70%.

[0045] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0046] By introducing polyethylene particles wrapped by cyclic olefin copolymer into the middle layer of the membrane, the overall structural stability of the membrane is further enhanced. The cyclic olefin copolymer wrapping layer can enhance the compatibility and bonding force between polyethylene particles. The interlayer similarity can reduce the interfacial tension between layers, making the bonding between the middle layer particles and between the middle layer and the inner and outer layers tighter, thereby improving the mechanical strength and durability of the membrane.

[0047] The middle layer uses polyethylene particles wrapped with cyclic olefin copolymer to improve the uniformity of the film. After the polyethylene particles are wrapped with cyclic olefin copolymer, the mutual attraction between particles can be reduced, the particle agglomeration can be reduced, the dispersion between polyethylene particles is improved, the uniformity of the film is enhanced, the defects and unevenness can be reduced, and the optical properties of the film are improved;

[0048] Cyclic olefin copolymer has a high heat deformation temperature and thermal stability as well as excellent barrier properties. Introducing it into the middle layer of the film can improve the stability of the entire film in a high temperature environment, prevent the film from deforming due to heat, and improve the film's barrier properties against oxygen, moisture and other gases. Cyclic olefin copolymer itself has good mechanical properties and chemical stability. Adding the polyethylene particles wrapped in it to the middle layer can enhance the tensile strength, tear resistance and weather resistance of the film, improve the service life and reliability of the film, and thus improve the overall performance of the film.

[0049] By adjusting the content and distribution of polyethylene particles wrapped by cyclic olefin copolymer, the optical properties of the film can be adjusted, further enhancing the controllability and adjustability of film preparation.

[0050] Embodiment 3: The above embodiment 2 further improves the quality of the environmentally friendly matte touch film by introducing polyethylene particles wrapped by cycloolefin copolymer into the middle layer of the film body. In order to further improve the performance of the environmentally friendly matte touch film, further optimization is made on the basis of embodiment 2.

[0051] Adjusting the particle size and content of polyethylene in the polyethylene particles wrapped by the copolymer in the inner layer, middle layer and outer layer of the film body in step S2;

[0052] Specifically, the particle size of the polyethylene in the polyethylene particles wrapped by the cyclic olefin copolymer in the outer layer of the membrane body is 2-4μm, and the mass fraction of the polyethylene particles is 20-50%; the particle size of the polyethylene in the polyethylene particles wrapped by the cyclic olefin copolymer in the middle layer of the membrane body is 3-6μm, and the mass fraction of the polyethylene particles is 60-90%; the particle size of the polyethylene in the polyethylene particles wrapped by the cyclic olefin copolymer in the outer layer of the membrane body is 5-8μm, and the mass fraction of the polyethylene particles is 20-50%.

[0053] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0054] The small-sized polyethylene particles in the inner layer can provide a more delicate touch, while the low content can maintain the flexibility and transparency of the inner layer, making the inner layer smoother, providing a smooth and soft touch, while maintaining good light transmittance;

[0055] The middle layer uses polyethylene particles with medium particle size to provide a good supporting structure, and the high content enhances the structural stability and barrier properties of the film. The middle layer uses polyethylene particles with medium particle size and high content to increase the contact points between particles. The wrapping of cycloolefin copolymer can enhance the binding force between particles, form a tighter structure, and improve the structural stability of the film. Polyethylene particles with different particle sizes and contents form a gradient structure in the film. This gradient structure design enables the film to disperse stress more effectively when subjected to external forces, improve the tensile strength and tear resistance of the film, improve the mechanical strength and barrier properties of the film, and can block oxygen, moisture, etc., extending the service life of the film.

[0056] Larger polyethylene particles can form tiny concave-convex structures on the outer layer, which can enhance the scattering of light, increase the diffuse reflection of the film, and achieve a specific matte effect. The moderate content ensures the strength and wear resistance of the outer layer, while maintaining sufficient durability to prevent cracking.

[0057] By adjusting the particle size and content of polyethylene particles in each layer, the transparency and matte degree of the film can be controlled and the adaptability of the matte film can be improved. Polyethylene particles of different particle sizes have different fluidity in the molten state. By adjusting the particle size distribution, the melt fluidity and thermal stability during processing can be improved, the processing difficulty and cost can be reduced, the defects in the production process can be reduced, and the controllability and adjustability of the preparation can be enhanced.

[0058] Embodiment 4: The above embodiment 3 improves the stability and quality of the production of the environmentally friendly matte tactile film by adjusting the particle size and content of the polyethylene particles. In order to further improve the performance of the environmentally friendly matte tactile film, further optimization is made on the basis of embodiment 3.

[0059] In step S2, the polyethylene of the polyethylene particles wrapped by the copolymer in the inner layer, the middle layer and the outer layer of the membrane body is any combination of high molecular weight polyethylene, medium molecular weight polyethylene and low molecular weight polyethylene;

[0060] The molecular weight of polyethylene is divided into high molecular weight 200,000-500,000 g / mol, medium molecular weight 50,000-200,000 g / mol, and low molecular weight 10,000-50,000 g / mol.

[0061] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0062] By adjusting the molecular weight distribution and particle size of each layer of polyethylene, the performance of the film can be finely controlled to form a gradient structure design, improve the melt fluidity and thermal stability during processing, improve production flexibility and adaptability, reduce processing difficulty and cost, reduce defects in the production process, improve product yield and production efficiency, and expand the scope of use of matte touch films; high molecular weight polyethylene has a higher melting point and melt viscosity, which makes the film have higher thermal stability and mechanical strength. High molecular weight polyethylene has a longer chain length and more intermolecular entanglement, so its tensile strength and wear resistance will also be improved. Using high molecular weight polyethylene in the film Ethylene can improve the durability and service life of the membrane, especially in application scenarios that need to withstand greater mechanical stress or frequent friction, the use of high molecular weight polyethylene can significantly improve the performance of the membrane; when high molecular weight polyethylene is combined with larger particle size particles, it can provide stronger structural support and enhance the overall stability of the membrane; when combined with medium particle size, it can form a tighter structure in the membrane, improve the ability to block external factors such as oxygen and moisture, while maintaining a certain degree of transparency; when combined with small particle size particles, small particle size particles are easy to distribute, which can make the inner layer of the membrane feel more delicate, while maintaining the flexibility and strength of high molecular weight polyethylene;

[0063] Medium molecular weight polyethylene has moderate fluidity in the molten state, with sufficient strength and good processing performance. It can provide moderate strength and flexibility in the film, making the film neither easy to break nor easy to deform. Using medium molecular weight polyethylene in the film can balance the mechanical properties and processing properties of the film, maintaining a certain strength while having good flexibility; when medium molecular weight polyethylene is combined with larger particle size particles, it can form a tiny concave-convex structure on the outer layer of the film, enhance the scattering of light, and achieve a specific matte effect, which not only ensures the durability of the outer layer but also prevents rupture; when combined with medium particle size, it can provide balanced performance, with good support structure and moderate flexibility and transparency; combined with small particle size particles, it can make the inner layer softer to the touch while maintaining flexibility and transparency;

[0064] Low molecular weight polyethylene has a low melting point, low melt viscosity, and good fluidity, which can make the film softer and easier to process. The strength of low molecular weight polyethylene is relatively low. Using low molecular weight polyethylene in the film can improve the flexibility and processing performance of the film, making it easier to process. The combination of low molecular weight polyethylene and small particle size particles can maximize the flexibility of the inner layer and enhance the fineness of the matte touch film. The combination of low molecular weight polyethylene and larger particle size can further enhance the scattering effect of light while maintaining transparency, achieving a more obvious matte effect.

[0065] When low molecular weight and small particle size polyethylene is used for the inner layer, medium molecular weight and medium particle size polyethylene is used for the middle layer, and high molecular weight and larger particle size polyethylene is used for the outer layer during production, the flexibility of the inner layer low molecular weight polyethylene and the smoothness of the small particle size particles are combined to make the inner layer softer and softer to the touch, so that the film has good flexibility and ductility, and is easy to process and form. The medium molecular weight and medium particle size polyethylene in the middle layer enhances the structural stability and improves the barrier properties. The outer layer high molecular weight polyethylene has excellent mechanical properties, combined with larger particle size particles, which can enhance the durability and wear resistance of the outer layer of the film. It is suitable for outdoor products and protective films that require high durability and structural stability. and packaging materials, etc.; when the inner layer uses low molecular weight and small particle size polyethylene, the middle layer uses high molecular weight and medium particle size polyethylene, and the outer layer uses medium molecular weight and larger particle size polyethylene, the inner layer also provides good flexibility and processing performance, the middle layer high molecular weight polyethylene provides strong mechanical strength, and the medium particle size particles play a good supporting role, which jointly enhance the structural stability of the membrane, while the outer layer of medium molecular weight and larger particle size polyethylene maintains a certain wear resistance, the larger particle size polyethylene particles can form a microscopic concave and convex surface, which can effectively scatter light and achieve a matte effect of the membrane, which is suitable for protective layers or interlayers of building materials, automotive interiors and electronic product packaging, etc.

[0066] In the comparative example, the matte film was prepared by the method of publication number CN114368208B without using polyethylene particles coated with cycloolefin copolymer.

[0067] The matte touch films prepared in Examples 1 to 4 and the comparative example were subjected to performance tests, wherein the inner layer of Example 4 used low molecular weight and small particle size polyethylene, the middle layer used medium molecular weight and medium particle size polyethylene, and the outer layer used high molecular weight and larger particle size polyethylene; the tensile strength measurement standard: ASTM D882-12 "Test method for tensile properties of plastic thin sheets"; the barrier performance measurement standard: GB / T197810-2021 "Packaging materials: oxygen permeability test of plastic films and sheets", GB / T1037-1988 "Test method for water vapor permeability of plastic films and sheets"; gloss measurement: measured using a 60-degree gloss meter; the test results are shown in the following table:

[0068]

[0069]

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for producing an environmentally friendly matte touch film, characterized in that: The specific steps include: S1. Preparation of polyethylene particles coated with cyclic olefin copolymer; Specifically, polyethylene particles are added into the cycloolefin solution, stirred evenly, and heated to make the cycloolefin copolymer form a uniform coating layer on the surface of the polyethylene particles, thereby obtaining; S2. Preparing a film body by multi-layer co-extrusion blown film; The film body comprises a laminated inner layer, a middle layer and an outer layer, the inner layer and the outer layer comprise polyethylene particles wrapped by cycloolefin copolymer, and the middle layer comprises polyethylene; the total thickness of the film body is 20-40 μm; S3. stretching the film and irradiating it with an electron beam; S4. performing corona treatment on the film; S5. Roll up.

2. The method for producing an environmentally friendly matte touch film according to claim 1, characterized in that: In the step S1, the particle size of the polyethylene particles is 2-8 μm; the content of the cycloolefin copolymer is 30-70%.

3. The method for producing an environmentally friendly matte touch film according to claim 1, characterized in that: In step S3, the stretching treatment temperature is 65-85° C., and the stretching treatment time is 0.5-10 min. The stretching treatment is performed on a stretching roller with negative pressure adsorption, and the negative pressure on the stretching roller is 110-140 mbar. The radiation amount of electron beam irradiation per square meter of the film body is 10-12 mrad.

4. The method for producing an environmentally friendly matte touch film according to claim 1, characterized in that: In the step S2, the middle layer of the membrane body includes polyethylene particles wrapped by cycloolefin copolymer.

5. The method for producing an environmentally friendly matte touch film according to claim 4, characterized in that: The thickness of the middle layer of the membrane accounts for 40-70% of the total thickness of the membrane, and the mass fraction of the cycloolefin copolymer in the middle layer of the membrane is 10-30%; the thickness of the outer and inner layers of the membrane both account for 15-30% of the total thickness of the membrane, and the mass fraction of the cycloolefin copolymer in the outer and inner layers is 30-70%.

6. The method for producing an environmentally friendly matte touch film according to claim 4, characterized in that: The particle size of the polyethylene in the polyethylene particles wrapped by the cyclic olefin copolymer in the outer layer of the membrane body is 2-4 μm, and the mass fraction of the polyethylene particles is 20-50%. The particle size of the polyethylene in the polyethylene particles wrapped by the cyclic olefin copolymer in the middle layer of the membrane body is 3-6 μm, and the mass fraction of the polyethylene particles is 60-90%. The particle size of the polyethylene in the polyethylene particles wrapped by the cyclic olefin copolymer in the outer layer of the membrane body is 5-8 μm, and the mass fraction of the polyethylene particles is 20-50%.

7. The method for producing an environmentally friendly matte touch film according to claim 4, characterized in that: The polyethylene of the polyethylene particles wrapped by the copolymer in the inner layer, the middle layer and the outer layer of the membrane body is any combination of high molecular weight polyethylene, medium molecular weight polyethylene and low molecular weight polyethylene.

8. The method for producing an environmentally friendly matte touch film according to claim 7, characterized in that: The molecular weight of the polyethylene is divided into high molecular weight 200,000-500,000 g / mol, medium molecular weight 50,000-200,000 g / mol, and low molecular weight 10,000-50,000 g / mol.

9. An environmentally friendly matte touch film, characterized in that: The environmentally friendly matte touch film is prepared by the production method of any one of claims 1 to 8.

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