Scratch-resistant PE (polyethylene) protective film as well as preparation method and application thereof

Abstract

The invention discloses a scratch-resistant PE protective film and a preparation method and application thereof. The scratch-resistant PE protective film comprises a PE original film, the scratch-resistant layer is arranged on the surface of one side of the PE original film, and the adhesive layer is arranged on the surface of the other side of the PE original film; the scratch-resistant layer is prepared by coating the surface of one side of the PE original film with a scratch-resistant coating, and the adhesive layer is prepared by coating the surface of the other side of the PE original film with an adhesive; wherein the scratch-resistant coating is prepared from the following raw materials in parts by weight: 90 to 110 parts of water-based light-cured polyurethane, 140 to 160 parts of deionized water, 10 to 20 parts of pentaerythritol tetra (3-mercaptopropionic acid) ester, 1 to 2 parts of a photoinitiator 184 and 0.1 to 0.5 part of a photoinitiator TPO. According to the scratch-resistant PE protective film as well as the preparation method and the application thereof, the scratch-resistant layer with higher hardness covers the surface of one side of the PE original film, so that the scratch-resistant PE protective film has excellent scratch resistance, and the adhesive layer is arranged on the surface of the other side of the PE original film, so that the PE original film can be conveniently attached to an object to be protected, and the application prospect is wide.

Description

Technical Field

[0001] The invention belongs to the technical field of PE protective films, and in particular relates to a scratch-resistant PE protective film and a preparation method and application thereof. Background Art

[0002] Polymer materials have excellent performance and a wide range of uses. Polyethylene, as a representative of organic film materials, is widely used for its advantages of low cost, good thermal stability, stable chemical properties, and extremely low friction coefficient. Among them, large and valuable items such as high-end cars, airplanes, and yachts need additional protection measures to extend their service life because the decorative panels of these items are very expensive and easily damaged. Covering the decorative panels of the above items with PE protective film is a common protection measure.

[0003] The scratch resistance of PE protective film refers to the ability of the PE film surface to withstand scratches and friction without being easily scratched or worn. PE protective films used in high-end cars, aircraft, yachts and other items have high requirements for scratch resistance.

[0004] Therefore, it is necessary to develop a scratch-resistant PE protective film and its preparation method, which can be used for the protection of decorative panels of large and valuable items such as high-end cars, airplanes and yachts. It has high scratch resistance and can be coated on the surface of the decorative panels of the items during use to protect the original smooth and shiny surface from pollution, corrosion or scratches. Summary of the invention

[0005] Purpose of the invention: In order to overcome the above shortcomings, the purpose of the present invention is to provide a scratch-resistant PE protective film and its preparation method and application, by surface treating the PE original film to increase its surface roughness, further improving the adsorption capacity of the PE original film with the scratch-resistant coating and adhesive, optimizing the formula of the scratch-resistant coating, so that one side of the surface of the PE original film is covered with a scratch-resistant layer with higher hardness, thereby improving the scratch resistance and having broad application prospects.

[0006] The objective of the present invention is achieved through the following technical solutions: A scratch-resistant PE protective film comprises an original PE film; a scratch-resistant layer is arranged on one surface of the original PE film and a glue layer is arranged on the other surface of the original PE film; the scratch-resistant layer is prepared by coating a scratch-resistant coating on one surface of the original PE film, and the glue layer is prepared by coating an adhesive on the other surface of the original PE film; wherein the scratch-resistant coating comprises the following raw materials in parts by weight: 90-110 parts of water-based light-cured polyurethane, 140-160 parts of deionized water, 10-20 parts of pentaerythritol tetrakis(3-mercaptopropionate), 1-2 parts of photoinitiator 184, and 0.1-0.5 parts of photoinitiator TPO.

[0007] The scratch-resistant PE protective film of the present invention improves the scratch resistance by covering a scratch-resistant layer with high hardness on one side of the PE original film, and provides an adhesive layer on the other side of the PE original film to facilitate the attachment of the PE original film to the object to be protected.

[0008] The scratch-resistant layer is prepared by coating a scratch-resistant coating on one side of the PE original film. The scratch-resistant coating is composed of water-based photocurable polyurethane, deionized water, pentaerythritol tetrakis (3-mercaptopropionic acid) ester, photoinitiator 184, and photoinitiator TPO. The water-based photocurable polyurethane uses deionized water as a solvent, which has less environmental pollution and meets environmental protection requirements. Photoinitiator 184 is compounded with photoinitiator TPO for photoinitiation. Initiator 184 and photoinitiator TPO have different wavelength absorption peaks. After compounding, they can absorb light energy in a wider wavelength range, thereby increasing the curing speed and the curing depth, and improving the quality of the scratch-resistant layer. Photoinitiator 184 and photoinitiator TPO have different sensitivities. After compounding, the available light intensity and light time range can be expanded, making the curing window wider. Pentaerythritol tetrakis (3-mercaptopropionic acid) ester can undergo a cross-linking reaction with polyurethane, increase the cross-linking degree of the coating and reduce internal stress, thereby increasing the wear resistance, chemical resistance, weather resistance and other properties of the scratch-resistant layer.

[0009] Furthermore, in the above-mentioned scratch-resistant PE protective film, the water-based light-curable polyurethane comprises the following raw materials in parts by weight: Polyether 30-50 parts; 10-20 parts of isophorone diisocyanate; 2-6 parts of small molecule chain extender; 1-5 parts of hydroxyethyl methacrylate; 1-5 parts of triethylamine; Dibutyltin dilaurate 0.1-0.5 parts.

[0010] Furthermore, in the above-mentioned scratch-resistant PE protective film, the polyether is selected from at least two of polyether diols, polyether triols, polytetramethylene ether diols, and polypropylene oxide ethers; and the small molecule chain extender is selected from at least two of 2,2-dihydroxymethylbutyric acid, neopentyl glycol, 1,4-butanediol, and ethylene glycol.

[0011] The scratch-resistant coating of the present invention has a reasonable formula design. In the water-based light-cured polyurethane, multiple polyethers are used as flexible segments, isophorone diisocyanate is used as a hard segment, hydroxyethyl methacrylate is used as a capping agent, dibutyltin dilaurate is used as a chain extender, triethylamine is used as a neutralizing agent, and multiple small molecule chain extenders are used to synthesize the water-based light-cured polyurethane. The hardness of the obtained scratch-resistant layer is 5H, and the water-based light-cured polyurethane has excellent scratch resistance.

[0012] Furthermore, in the above-mentioned scratch-resistant PE protective film, the PE original film is surface-treated and then coated on both sides of the PE original film with adhesive and scratch-resistant coating respectively.

[0013] Surface treatment of the original PE film can increase its surface roughness and further improve the adsorption capacity of the original PE film with scratch-resistant coatings and adhesives. This can not only improve the quality of the scratch-resistant layer, but also reduce the situation where the adhesive layer is left behind when the PE protective film is removed.

[0014] Furthermore, in the above-mentioned scratch-resistant PE protective film, the surface treatment of the PE original film includes at least one of corona treatment, oxygen plasma treatment, and chlorine plasma treatment.

[0015] Furthermore, in the above-mentioned scratch-resistant PE protective film, the adhesive is SIS pressure-sensitive adhesive.

[0016] The present invention also relates to a method for preparing the scratch-resistant PE protective film, comprising the following steps: S1: Surface treatment of the original PE film; S2: preparing a scratch-resistant coating, and evenly coating the prepared scratch-resistant coating on one side of the surface of the surface-treated PE original film, and after the water evaporates, placing it under a 500-1500W high-pressure mercury lamp at room temperature for ultraviolet curing to obtain a scratch-resistant layer; S3: The adhesive is evenly coated on the other side of the surface of the surface-treated PE original film to obtain an adhesive layer.

[0017] Furthermore, in the method for preparing the scratch-resistant PE protective film, the step S1 specifically comprises the following steps: S11 corona treatment: first perform corona treatment on both sides of the original PE film. The output power of the corona machine is 5-15kW, the frequency is adjusted to 10-20kHz, the treatment voltage is 10-20kV, and the treatment lasts for 1-3min. S12 chlorine plasma treatment: the surfaces of both sides of the original PE film after corona treatment are treated with chlorine plasma. The power of the plasma etcher is 300-1000W, the DC bias voltage is 100-300V, the gas is Cl2 / He, the flow rate is (20-50) sccm / (5-10) sccm, and the treatment time is 1-3min. S13 oxygen plasma treatment: oxygen plasma treatment is performed on both sides of the PE original film after chlorine plasma treatment. The power of the plasma etcher is 300-1000W, the DC bias voltage is 100-300V, the gas is O2 / He, the flow rate is (20-50) sccm / (5-10) sccm, and the treatment lasts 1-3min.

[0018] Furthermore, in the method for preparing the scratch-resistant PE protective film, the step S2 specifically comprises the following steps: S21: Add polyether to a dry reactor filled with nitrogen, heat to melt it, cool to 40-50°C, add isophorone diisocyanate, stir for 10-30 minutes, add dibutyltin dilaurate, heat to 80-90°C, react for 30-60 minutes, add a small molecule chain extender, continue to react for 2-4 hours, cool to 50-60°C, add hydroxyethyl methacrylate, continue to react for 2-4 hours, after the reaction is completed, cool to 30-40°C, add triethylamine, neutralize for 20-40 minutes, and obtain a water-based light-curable polyurethane; S22: Deionized water is added to the above-mentioned water-based photocurable polyurethane for emulsification to obtain a uniform emulsion, and photoinitiator 184, photoinitiator TPO, and pentaerythritol tetrakis(3-mercaptopropionate) are sequentially added to the emulsion, and emulsification is continued to obtain a uniform scratch-resistant coating.

[0019] The present invention also relates to the application of the scratch-resistant PE protective film, which is applied to the protection of decorative panels of large valuable items.

[0020] Flatly sticking a scratch-resistant PE protective film on the decorative panels of large valuable items can effectively prevent the surface of the decorative panels of large valuable items from being scratched or worn due to scratches and friction during use.

[0021] Compared with the prior art, the present invention has the following beneficial effects: (1) The scratch-resistant PE protective film disclosed in the present invention effectively improves the scratch resistance by covering a scratch-resistant layer with high hardness on one side of the PE original film, and a glue layer is provided on the other side of the PE original film to facilitate the attachment of the PE original film to the object to be protected; (2) The scratch-resistant PE protective film disclosed in the present invention provides a formula of a scratch-resistant coating, which is composed of water-based light-cured polyurethane, deionized water, pentaerythritol tetrakis (3-mercaptopropionate), photoinitiator 184, and photoinitiator TPO. In the water-based light-cured polyurethane, multiple polyethers are used as flexible segments, isophorone diisocyanate is used as a hard segment, hydroxyethyl methacrylate is used as a capping agent, dibutyltin dilaurate is used as a chain extender, and triethylamine is used as a neutralizing agent. The water-based light-cured polyurethane is synthesized with multiple small molecule chain extenders to make Using deionized water as a solvent has less pollution to the environment and meets environmental protection requirements. Using photoinitiator 184 and photoinitiator TPO for photoinitiation can increase the curing speed, increase the curing depth, expand the curing window, and improve the quality of the scratch-resistant layer. Pentaerythritol tetrakis (3-mercaptopropionic acid) ester can react with polyurethane to increase the crosslinking degree of the coating and reduce internal stress, thereby increasing the wear resistance, chemical resistance, weather resistance and other properties of the scratch-resistant layer. The hardness of the scratch-resistant layer using the scratch-resistant coating is 5H, which has excellent scratch resistance. (3) The preparation method of the scratch-resistant PE protective film disclosed in the present invention is simple and highly flexible and can be mass-produced; (4) The application of the scratch-resistant PE protective film disclosed in the present invention, by flatly attaching the scratch-resistant PE protective film on the decorative panels of large valuable items, can effectively prevent the surface of the decorative panels of large valuable items from being scratched or worn due to scratching and friction during use. DETAILED DESCRIPTION

[0022] The following will combine Comparative Example 1, Comparative Example 2, Example 1 and specific experimental data to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. Comparative Example 1 Comparative Example 1 is an original PE film (width and thickness are 1230 mm and 60 μm, respectively).

[0023] The following Comparative Example 2 and Example 1 provide a scratch-resistant PE protective film and a preparation method thereof.

[0024] Comparative Example 2 The scratch-resistant PE protective film of comparative example 2 includes a PE original film (same as comparative example 1), a scratch-resistant layer is arranged on one surface of the PE original film and an adhesive layer is arranged on the other surface, the scratch-resistant layer is prepared by coating a scratch-resistant coating on one surface of the PE original film, and the thickness of the scratch-resistant layer is 10 μm, and the adhesive layer is prepared by coating an adhesive (SIS pressure-sensitive adhesive, brand SIS D1161JSP) on the other surface of the PE original film, and the thickness of the adhesive layer is 15 μm.

[0025] Wherein, the scratch-resistant coating comprises the following raw materials in parts by weight: Polyether diol (Mr=1000) 25 parts; Polytetramethylene glycol (Mr=1000) 20 parts; 18 parts of isophorone diisocyanate; 3 parts of neopentyl glycol; 1 part of 1,4-butanediol; 2 parts of hydroxyethyl methacrylate; 1 part of triethylamine; 0.2 parts of dibutyltin dilaurate; 100 parts of deionized water; Pentaerythritol tetrakis (3-mercaptopropionic acid) 9 parts; Photoinitiator 184 0.9 parts Photoinitiator TPO 0.1 parts.

[0026] The scratch-resistant PE protective film of Comparative Example 2 comprises the following steps: S1: preparing a scratch-resistant coating, coating the prepared scratch-resistant coating evenly on one side of the original PE film, and after the water evaporates, placing it under a 1000W high-pressure mercury lamp for ultraviolet curing at room temperature to obtain a scratch-resistant layer; The preparation of the scratch-resistant coating specifically includes the following steps: S11: Add polyether diol and polytetrahydrofuran ether diol to a dry reactor filled with nitrogen, heat to melt, and then cool to 45°C, add isophorone diisocyanate, stir for 20 minutes, add dibutyltin dilaurate, heat to 82°C, react for 40 minutes, add neopentyl glycol and 1,4-butanediol, continue to react for 4 hours, cool to 50°C, add hydroxyethyl methacrylate, continue to react for 3 hours, and after the reaction is completed, cool to 40°C, add triethylamine, neutralize for 30 minutes, and obtain a water-based light-curable polyurethane; S12: adding deionized water to the water-based light-curable polyurethane for emulsification to obtain a uniform emulsion, sequentially adding photoinitiator 184, photoinitiator TPO, and pentaerythritol tetrakis(3-mercaptopropionate) ester to the emulsion, and continuing emulsification to obtain a uniform scratch-resistant coating; S2: Evenly apply the adhesive on the other side of the surface of the surface-treated PE original film to obtain an adhesive layer.

[0027] Example 1 The scratch-resistant PE protective film of Example 1 includes a PE original film (same as comparison example 1), a scratch-resistant layer is provided on one surface of the surface of the surface-treated PE original film and an adhesive layer is provided on the other surface, the scratch-resistant layer is prepared by coating a scratch-resistant coating on one surface of the PE original film, and the thickness of the scratch-resistant layer is 10 μm, and the adhesive layer is prepared by coating an adhesive (SIS pressure-sensitive adhesive, brand SISD1161JSP) on the other surface of the PE original film, and the thickness of the adhesive layer is 15 μm.

[0028] Wherein, the scratch-resistant coating comprises the following raw materials in parts by weight: Polyether diol (Mr = 1 000) 25 parts; Polytetramethylene glycol (Mr=1 000) 20 parts; 18 parts of isophorone diisocyanate; 3 parts of neopentyl glycol; 1 part of 1,4-butanediol; 2 parts of hydroxyethyl methacrylate; 1 part of triethylamine; 0.2 parts of dibutyltin dilaurate; 100 parts of deionized water; Pentaerythritol tetrakis (3-mercaptopropionic acid) 9 parts; Photoinitiator 184 0.9 parts Photoinitiator TPO 0.1 parts.

[0029] The scratch-resistant PE protective film of embodiment 1 comprises the following steps: S1: Surface treatment of the original PE film; Among them, the surface treatment of the original PE film specifically includes the following steps: S11 corona treatment: The surfaces of both sides of the PE original film are first subjected to corona treatment. The output power of the corona machine is 10kW, the frequency is adjusted to 15kHz, the treatment voltage is 10kV, and the treatment is 1min. S12 chlorine plasma treatment: the surfaces of both sides of the corona treated PE original film were treated with chlorine plasma. The power of the plasma etcher was 500W, the DC bias voltage was 200V, the gas was Cl2 / He, the flow rate was 25sccm / 6sccm, and the treatment lasted for 2min. S13 oxygen plasma treatment: oxygen plasma treatment is performed on both sides of the PE original film after chlorine plasma treatment. The power of the plasma etcher is 500W, the DC bias voltage is 200V, the gas is O2 / He, the flow rate is 30sccm / 8sccm, and the treatment is 2min. S2: preparing a scratch-resistant coating, and evenly coating the prepared scratch-resistant coating on one side of the original PE film. After the water evaporates, the coating is placed under a 1000W high-pressure mercury lamp at room temperature for ultraviolet curing to obtain a scratch-resistant layer; The preparation of the scratch-resistant coating specifically includes the following steps: S21: Add polyether diol and polytetrahydrofuran ether diol to a dry reactor filled with nitrogen, heat to melt, and then cool to 45°C, add isophorone diisocyanate, stir for 20 minutes, add dibutyltin dilaurate, heat to 82°C, react for 40 minutes, add neopentyl glycol and 1,4-butanediol, continue to react for 4 hours, cool to 50°C, add hydroxyethyl methacrylate, continue to react for 3 hours, and after the reaction is completed, cool to 40°C, add triethylamine, neutralize for 30 minutes, and obtain a water-based light-curable polyurethane; S22: adding deionized water to the water-based light-curable polyurethane for emulsification to obtain a uniform emulsion, sequentially adding photoinitiator 184, photoinitiator TPO, and pentaerythritol tetrakis(3-mercaptopropionate) ester to the emulsion, and continuing emulsification to obtain a uniform scratch-resistant coating; S3: Evenly apply the adhesive on the other side of the surface of the surface-treated PE original film to obtain an adhesive layer.

[0030] Effect verification: The hardness test was performed on the scratch-resistant PE protective films respectively prepared from the PE original film of Comparative Example 1, Comparative Example 2 and Example 1. The test results are shown in Table 1.

[0031] Table 1 Hardness test results The scratch-resistant layer adhesion test was performed on the scratch-resistant PE protective films prepared in the above-mentioned comparative example 2 and embodiment 1, and the test results are shown in Table 2.

[0032] Table 2 Adhesion test results The peeling strength and anti-residue performance of the adhesive layer of the scratch-resistant PE protective films prepared in the above-mentioned comparative example 2 and embodiment 1 were tested.

[0033] Among them, the test materials are based on the current mainstream decorative panel products in the market, and 4 representative decorative panels are selected. The surface finishing materials of the 4 decorative panels are shown in Table 3.

[0034] Table 3 Surface finishing materials of four veneer panels The scratch-resistant PE protective films prepared in Comparative Example 2 and Example 1 were directly applied to the front of the four decorative panels by a flat laminating machine. The comparative example 2-triamine decorative panel was sample 1, the comparative example 2-UV decorative panel was sample 2, the comparative example 2-PVC decorative panel was sample 3, the comparative example 2-PVC decorative panel was sample 4, the example 1-triamine decorative panel was sample 5, the example 1-UV decorative panel was sample 6, the example 1-PVC decorative panel was sample 7, and the example 1-PVC decorative panel was sample 8.

[0035] The test results of the peel strength (GB / T 2792-2014) and anti-residue performance (ASTM D3359 Standard Test Methods for Rating Adhesion by Tape Test) of the scratch-resistant PE protective films prepared in Comparative Example 2 and Example 1 are shown in Table 4.

[0036] Table 4 Test results of peel strength and anti-residue performance The present invention has many specific application paths, and the above is only a preferred embodiment of the present invention. It should be pointed out that the above embodiments are only used to illustrate the present invention, and are not used to limit the protection scope of the present invention. For those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A scratch-resistant PE protective film, characterized in that: It comprises a PE original film; a scratch-resistant layer is arranged on one side of the PE original film and a glue layer is arranged on the other side; the scratch-resistant layer is prepared by coating a scratch-resistant coating on one side of the PE original film, and the glue layer is prepared by coating an adhesive on the other side of the PE original film; wherein the scratch-resistant coating comprises the following raw materials in parts by weight: 90-110 parts of water-based light-cured polyurethane, 140-160 parts of deionized water, 10-20 parts of pentaerythritol tetrakis(3-mercaptopropionic acid), 1-2 parts of photoinitiator 184, and 0.1-0.5 parts of photoinitiator TPO.

2. The scratch-resistant PE protective film according to claim 1, characterized in that: The water-based light-curable polyurethane comprises the following raw materials in parts by weight: Polyether 30-50 parts; 10-20 parts of isophorone diisocyanate; 2-6 parts of small molecule chain extender; 1-5 parts of hydroxyethyl methacrylate; 1-5 parts of triethylamine; Dibutyltin dilaurate 0.1-0.5 parts.

3. The scratch-resistant PE protective film according to claim 2, characterized in that: The polyether is selected from at least two of polyether diols, polyether triols, polytetramethylene ether diols, and polypropylene oxide ethers; the small molecule chain extender is selected from at least two of 2,2-dihydroxymethylbutyric acid, neopentyl glycol, 1,4-butanediol, and ethylene glycol.

4. The scratch-resistant PE protective film according to claim 1, characterized in that: After the surface of the PE original film is treated, adhesive and scratch-resistant coating are respectively applied on the surfaces of both sides of the PE original film.

5. The scratch-resistant PE protective film according to claim 4, characterized in that: The surface treatment of the original PE film includes at least one of corona treatment, oxygen plasma treatment and chlorine plasma treatment.

6. The scratch-resistant PE protective film according to claim 1, characterized in that: The adhesive is SIS pressure-sensitive adhesive.

7. The method for preparing the scratch-resistant PE protective film according to any one of claims 1 to 6, characterized in that: The steps include: S1: Surface treatment of the original PE film; S2: preparing a scratch-resistant coating, and evenly coating the prepared scratch-resistant coating on one side of the surface of the surface-treated PE original film, and after the water evaporates, placing it under a 500-1500W high-pressure mercury lamp at room temperature for ultraviolet curing to obtain a scratch-resistant layer; S3: The adhesive is evenly coated on the other side of the surface of the surface-treated PE original film to obtain an adhesive layer.

8. The method for preparing the scratch-resistant PE protective film according to claim 7, characterized in that: The step S1 specifically includes the following steps: S11 corona treatment: first perform corona treatment on both sides of the original PE film. The output power of the corona machine is 5-15kW, the frequency is adjusted to 10-20kHz, the treatment voltage is 10-20kV, and the treatment lasts for 1-3min. S12 chlorine plasma treatment: the surfaces of both sides of the original PE film after corona treatment are treated with chlorine plasma. The power of the plasma etcher is 300-1000W, the DC bias voltage is 100-300V, the gas is Cl2 / He, the flow rate is (20-50) sccm / (5-10) sccm, and the treatment time is 1-3min. S13 oxygen plasma treatment: oxygen plasma treatment is performed on both sides of the PE original film after chlorine plasma treatment. The power of the plasma etcher is 300-1000W, the DC bias voltage is 100-300V, the gas is O2 / He, the flow rate is (20-50) sccm / (5-10) sccm, and the treatment lasts 1-3min.

9. The method for preparing the scratch-resistant PE protective film according to claim 7, characterized in that: The step S2 specifically includes the following steps: S21: Add polyether to a dry reactor filled with nitrogen, heat to melt it, cool to 40-50°C, add isophorone diisocyanate, stir for 10-30 minutes, add dibutyltin dilaurate, heat to 80-90°C, react for 30-60 minutes, add a small molecule chain extender, continue to react for 2-4 hours, cool to 50-60°C, add hydroxyethyl methacrylate, continue to react for 2-4 hours, after the reaction is completed, cool to 30-40°C, add triethylamine, neutralize for 20-40 minutes, and obtain a water-based light-curable polyurethane; S22: Deionized water is added to the above-mentioned water-based photocurable polyurethane for emulsification to obtain a uniform emulsion, and photoinitiator 184, photoinitiator TPO, and pentaerythritol tetrakis(3-mercaptopropionate) are sequentially added to the emulsion, and emulsification is continued to obtain a uniform scratch-resistant coating.

10. The use of the scratch-resistant PE protective film according to any one of claims 1 to 6, characterized in that: The scratch-resistant PE protective film is used for protecting decorative panels of large valuable items.

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