Thermoplastic polyurethane film with matting effect and preparation method thereof

Abstract

The invention relates to the technical field of matt films, in particular to a thermoplastic polyurethane film with a matt effect and a preparation method of the thermoplastic polyurethane film. The thermoplastic polyurethane film with the matting effect is prepared from the following raw materials in parts by mass: 80 to 120 parts of polypropylene random copolymer, 30 to 50 parts of crystalline thermoplastic polyurethane, 8 to 26 parts of activated glass fiber, 5 to 15 parts of compatibilizer, 1 to 2 parts of antioxidant, 1 to 2 parts of light stabilizer and 1 to 2 parts of lubricant, the activated glass fiber is prepared by the following steps: carrying out plasma treatment on glass fiber in an argon atmosphere for 50-100 seconds, adding the treated glass fiber into an ethanol water solution, stirring, then adding hydrochloric acid, adding tetrabutyl titanate and tetraethoxysilane in a stirring state, stirring at 40-50 DEG C for 1-2 hours, filtering, drying, spraying a silane coupling agent solution on the surface, and carrying out vacuum drying. According to the invention, high haze and low glossiness are realized, and the material is endowed with flexible and bendable characteristics.

Description

Technical Field

[0001] The invention relates to the technical field of matt films, in particular to a thermoplastic polyurethane film with a matt effect and a preparation method thereof. Background Art

[0002] In the field of textile and apparel decorative materials, polyolefin-based matte films, represented by polyethylene (PE) and polypropylene (PP), have long been the mainstream material used for decorative applications such as clothing logos and hot stamping patterns. Leveraging the crystalline properties of polyethylene, these materials, through blending and modification, form films with a unique light-scattering structure, effectively reducing surface gloss and even achieving a matte effect. These polyolefin-based matte films have a mature and stable production process, low raw material costs, and can be quickly formed through cast or blow molding, making them widely used in various decorative applications.

[0003] However, polyolefin-based matte films have exposed significant performance defects during long-term use. They are prone to photo-oxidation synergistic degradation reactions under ultraviolet light. This photoaging effect not only causes visual degradation phenomena such as yellow spots and color differences in the decorative layer, but also causes molecular chains to break to form microporous structures, reducing the tensile strength of the material, seriously affecting the decorative durability of clothing during repeated wear.

[0004] At the same time, polyolefin materials have poor weather resistance. When used for outdoor clothing decoration, microcracks appear on the surface of the material and expand, and the edges of the decorative patterns peel off. This defect in washable performance directly limits the use of the product in application scenarios such as washing labels and detachable decorations.

[0005] Although the rigidity of polyolefin materials can be improved by blending inorganic fillers, the interfacial bonding between the non-polar polyolefin matrix and the polar filler is weak. Filler agglomeration not only makes the material surface feel stiff, but also forms microcrack sources in stress concentration areas, seriously restricting the product's ability to maintain its appearance after multiple wear and washing.

[0006] Currently, the above-mentioned defects have led to strict restrictions on the application of polyolefin-based matte films in the high-end clothing market, becoming a technical problem that needs to be solved. Summary of the Invention

[0007] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a thermoplastic polyurethane film with a matte effect and a preparation method thereof.

[0008] A thermoplastic polyurethane film with matting effect comprises the following raw materials by mass: 80-120 parts of random copolymerized polypropylene, 30-50 parts of crystalline thermoplastic polyurethane, 8-26 parts of activated glass fiber, 5-15 parts of compatibilizer, 1-2 parts of antioxidant, 1-2 parts of light stabilizer and 1-2 parts of lubricant.

[0009] The activated glass fiber is prepared by the following steps: the glass fiber is plasma treated in an argon atmosphere for 50-100 seconds, added to an ethanol aqueous solution and stirred, followed by adding hydrochloric acid, and tetrabutyl titanate and ethyl orthosilicate are added thereto under stirring, stirred at 40-50° C. for 1-2 hours, filtered, dried, sprayed with a silane coupling agent solution on the surface, and vacuum dried.

[0010] Preferably, the compatibilizer is an amorphous α-olefin copolymer containing polypropylene groups in its main chain.

[0011] Preferably, the antioxidant is antioxidant 1010 or / and antioxidant 168.

[0012] Preferably, the light stabilizer is a benzotriazole light stabilizer.

[0013] Preferably, the lubricant is calcium stearate and / or ethylene bisstearamide.

[0014] Preferably, the mass ratio of glass fiber, tetrabutyl titanate, ethyl orthosilicate and silane coupling agent is 5-15:1-5:1-4:0.05-0.25.

[0015] Preferably, the fineness of the glass fiber is 20-50 μm, and the silane coupling agent is KH570 coupling agent.

[0016] Preferably, the plasma treatment power density is 30-40 W / m 2 .

[0017] Preferably, the mass fraction of the silane coupling agent solution is 5-12.5%.

[0018] The method for preparing the thermoplastic polyurethane film having a matting effect comprises the following steps: S1. Premixing random copolymer polypropylene, crystalline thermoplastic polyurethane, a compatibilizer, an antioxidant, a light stabilizer, and a lubricant for 1-5 minutes to obtain a premix; S2. Add the premix to the main feed port of the twin-screw extruder, add the activated glass fiber from the side feed port, and melt extrude.

[0019] Preferably, the thermoplastic polyurethane film has a thickness of 100-500 μm.

[0020] Beneficial effects: The present invention adopts random copolymerization polypropylene and thermoplastic polyurethane to form a microphase separation structure, combines a compatibilizer and controls the ratio of the three to moderately regulate the microphase structure, thereby achieving effective water washability of the matte film, and at the same time giving the material soft and bendable properties, which can adapt to the complex needs of curved surface decoration.

[0021] The present invention treats the glass fiber with argon plasma and then hydrolyzes it on the surface to generate SiO2 and TiO2 deposition layers, which not only have extremely high bonding strength, but also have high bonding strength with random copolymer polypropylene and crystalline thermoplastic polyurethane. Multiple light scattering centers can be generated when dispersed therein, which can effectively enhance the haze of the film, reduce the glossiness, and achieve a matte effect similar to a rough surface, and can also significantly enhance the tensile strength of the product, and the product has excellent mechanical properties.

[0022] The present invention combines a SiO2-TiO2 adhesion layer on the surface of the glass fiber with the effect of crystalline thermoplastic polyurethane, which greatly reduces the ultraviolet transmittance of the system, has excellent aging resistance, and has a high color fastness retention rate after washing, far exceeding that of traditional PE-based films.

[0023] The present invention utilizes the synergistic effect of thermoplastic polyurethane and random copolymerized polypropylene, combined with a compatibilizer and activated glass fiber to regulate the microphase structure, thereby not only achieving high haze and low gloss, but also increasing water washability by 3 times and color retention by 50%, while giving the material soft and bendable properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 1-2 is a comparison chart of the haze and surface gloss of the thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2.

[0025] Figure 2 1 is a comparison chart of the tensile strength and elongation at break of the thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2.

[0026] Figure 3 This is a comparison chart of the Shore hardness and haze retention after 1000 hours of xenon lamp aging of the thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2.

[0027] Figure 4 This is a comparison chart of the haze retention rate and gloss change rate of the thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2 after being washed with water 10 times. DETAILED DESCRIPTION

[0028] The present invention will be further explained below with reference to specific embodiments.

[0029] The random copolymer polypropylene used below was purchased from / originating from XX Company with the brand name YY.

[0030] The crystalline thermoplastic polyurethane used below was purchased from / derived from XX Company with the brand name YY.

[0031] The compatibilizer used below is an amorphous α-olefin copolymer purchased from / derived from XX Company with a brand name of YY, and contains a polypropylene group in its main chain.

[0032] [Shell Mask 1] Example 1 A thermoplastic polyurethane film with a matting effect, comprising raw materials of: 80g of random copolymerized polypropylene, 30g of crystalline thermoplastic polyurethane, 8g of activated glass fiber, 5g of a compatibilizer, 1g of an antioxidant 168, 1g of an ultraviolet absorber UV-326, and 1g of calcium stearate.

[0033] The activated glass fiber was prepared by the following steps: 5g of glass fiber with a fineness of 20-50μm was surface activated by plasma treatment equipment in an argon atmosphere, wherein the power density was 30W / m 2 , the treatment time is 50s, added to 50g of 50% ethanol aqueous solution and stirred, then added 0.5g of 1mol / L hydrochloric acid, added 1g of tetrabutyl titanate and 1g of ethyl orthosilicate under stirring, stirred at a temperature of 40℃ for 1h, the stirring speed is 100r / min, filtered, dried with hot air at a temperature of 120℃, sprayed with 5% KH570 coupling agent solution on the surface, and dried in vacuum.

[0034] The method for preparing the thermoplastic polyurethane film having a matting effect comprises the following steps: S1. Premix random copolymer polypropylene, crystalline thermoplastic polyurethane, compatibilizer, antioxidant 168, ultraviolet absorber UV-326, and calcium stearate in a high-speed mixer for 1 minute to obtain a premix; S2. Add the premix to the main feed port of the twin-screw extruder, add the activated glass fiber from the side feed port, and melt extrude. The processing temperature is 160°C.

[0035] Example 2 A thermoplastic polyurethane film with a matting effect, comprising raw materials of: 120 g of random copolymerized polypropylene, 50 g of crystalline thermoplastic polyurethane, 26 g of activated glass fiber, 15 g of a compatibilizer, 1 g of an antioxidant 168, 1 g of an antioxidant 1010, 2 g of an ultraviolet absorber UV-326, and 2 g of calcium stearate.

[0036] The activated glass fiber was prepared by the following steps: 15g of glass fiber with a fineness of 20-50μm was surface activated by plasma treatment equipment in an argon atmosphere, wherein the power density was 40W / m 2 , the treatment time is 100s, added to 100g of 60% ethanol aqueous solution and stirred, then added 1g of 2mol / L hydrochloric acid, added 5g of tetrabutyl titanate and 4g of ethyl orthosilicate under stirring, stirred at a temperature of 50℃ for 2h, the stirring speed is 400r / min, filtered, dried with hot air at a temperature of 140℃, sprayed with 12.5% KH570 coupling agent solution on the surface, and dried in vacuum.

[0037] The method for preparing the thermoplastic polyurethane film having a matting effect comprises the following steps: S1. Premix random copolymer polypropylene, crystalline thermoplastic polyurethane, compatibilizer, antioxidant 168, antioxidant 1010, ultraviolet absorber UV-326, and calcium stearate in a high-speed mixer for 5 minutes to obtain a premix; S2. Add the premix to the main feed port of the twin-screw extruder, add the activated glass fiber from the side feed port, and melt extrude. The processing temperature is 200°C.

[0038] Example 3 A thermoplastic polyurethane film with a matting effect, comprising raw materials: 90 g of random copolymer polypropylene, 45 g of crystalline thermoplastic polyurethane, 12 g of activated glass fiber, 12 g of a compatibilizer, 0.4 g of an antioxidant 168, 0.9 g of an antioxidant 1010, 1.7 g of an ultraviolet absorber UV-326, and 1.2 g of calcium stearate.

[0039] The activated glass fiber was prepared by the following steps: 12g of glass fiber with a fineness of 20-50μm was surface activated by plasma treatment equipment in an argon atmosphere, wherein the power density was 33W / m 2 The mixture was added to 70 g of 58% ethanol aqueous solution with a stirring time of 90 s, followed by adding 0.7 g of 1.8 mol / L hydrochloric acid, and adding 2 g of tetrabutyl titanate and 3 g of ethyl orthosilicate under stirring. The mixture was stirred at 42 ° C for 100 min at a stirring speed of 200 r / min, filtered, and dried with hot air at 135 ° C. The surface was sprayed with 8% KH570 coupling agent solution by mass, and vacuum dried.

[0040] The method for preparing the thermoplastic polyurethane film having a matting effect comprises the following steps: S1. Premix random copolymer polypropylene, crystalline thermoplastic polyurethane, compatibilizer, antioxidant 168, antioxidant 1010, ultraviolet absorber UV-326, and calcium stearate in a high-speed mixer for 4 minutes to obtain a premix; S2. Add the premix to the main feed port of the twin-screw extruder, add the activated glass fiber from the side feed port, and melt extrude. The processing temperature is 170°C.

[0041] Example 4 A thermoplastic polyurethane film with a matting effect. Its raw materials include: 110g of random copolymerized polypropylene, 35g of crystalline thermoplastic polyurethane, 22g of activated glass fiber, 8g of a compatibilizer, 1.7g of an antioxidant 1010, 1.3g of an ultraviolet absorber UV-326, and 1.8g of ethylene bisstearamide.

[0042] The activated glass fiber was prepared by the following steps: 8g of glass fiber with a fineness of 20-50μm was surface activated by plasma treatment equipment in an argon atmosphere, wherein the power density was 37W / m 2 , the treatment time is 70s, added to 90g of 52% ethanol aqueous solution and stirred, then added 0.9g of 1.2mol / L hydrochloric acid, added 4g of tetrabutyl titanate and 2g of ethyl orthosilicate under stirring, stirred at a temperature of 48°C for 80min, the stirring speed is 300r / min, filtered, dried with hot air at a temperature of 125°C, sprayed with a 10% mass fraction of KH570 coupling agent solution on the surface, and vacuum dried.

[0043] The method for preparing the thermoplastic polyurethane film having a matting effect comprises the following steps: S1. Premix random copolymer polypropylene, crystalline thermoplastic polyurethane, compatibilizer, antioxidant 1010, ultraviolet absorber UV-326, and ethylene bisstearamide in a high-speed mixer for 2 minutes to obtain a premix; S2. Add the premix to the main feed port of the twin-screw extruder, add the activated glass fiber from the side feed port, and melt extrude. The processing temperature is 190°C.

[0044] Example 5 A thermoplastic polyurethane film with a matting effect. Its raw materials include: 100g of random copolymer polypropylene, 40g of crystalline thermoplastic polyurethane, 17g of activated glass fiber, 10g of a compatibilizer, 1.5g of an antioxidant 1010, 1.5g of an ultraviolet absorber UV-326, and 1.5g of ethylene bisstearamide.

[0045] The activated glass fiber was prepared by the following steps: 10g of glass fiber with a fineness of 20-50μm was surface activated by plasma treatment equipment in an argon atmosphere, wherein the power density was 35W / m 2 , the treatment time is 80s, added to 80g of 55% ethanol aqueous solution and stirred, then added 0.8g of 1.5mol / L hydrochloric acid, and added 3g of tetrabutyl titanate and 2.5g of ethyl orthosilicate under stirring. Stir at a temperature of 45°C for 90min, the stirring speed is 260r / min, filtered, dried with hot air at a temperature of 130°C, sprayed with a 9% mass fraction of KH570 coupling agent solution on the surface, and vacuum dried.

[0046] The method for preparing the thermoplastic polyurethane film having a matting effect comprises the following steps: S1. Premix random copolymer polypropylene, crystalline thermoplastic polyurethane, compatibilizer, antioxidant 1010, ultraviolet absorber UV-326, and ethylene bisstearamide in a high-speed mixer for 3 minutes to obtain a premix; S2. Add the premix to the main feed port of the twin-screw extruder, add the activated glass fiber from the side feed port, and melt extrude. The processing temperature is 180°C.

[0047] Comparative Example 1 A thermoplastic polyurethane film with a matting effect. Its raw materials include: 100g of random copolymer polypropylene, 40g of crystalline thermoplastic polyurethane, 17g of activated glass fiber, 10g of a compatibilizer, 1.5g of an antioxidant 1010, 1.5g of an ultraviolet absorber UV-326, and 1.5g of ethylene bisstearamide.

[0048] The activated glass fiber was prepared by the following steps: 10 g of glass fiber with a fineness of 20-50 μm was added to 80 g of 55% ethanol aqueous solution and stirred, followed by adding 0.8 g of 1.5 mol / L hydrochloric acid, and adding 3 g of tetrabutyl titanate and 2.5 g of ethyl orthosilicate under stirring. The mixture was stirred at 45°C for 90 min at a stirring speed of 260 r / min, filtered, dried with hot air at 130°C, sprayed with 9% KH570 coupling agent solution on the surface, and dried in vacuo.

[0049] The method for preparing the thermoplastic polyurethane film having a matting effect comprises the following steps: S1. Premix random copolymer polypropylene, crystalline thermoplastic polyurethane, compatibilizer, antioxidant 1010, ultraviolet absorber UV-326, and ethylene bisstearamide in a high-speed mixer for 3 minutes to obtain a premix; S2. Add the premix to the main feed port of the twin-screw extruder, add the activated glass fiber from the side feed port, and melt extrude. The processing temperature is 180°C.

[0050] Comparative Example 2 A thermoplastic polyurethane film with a matting effect. Its raw materials include: 100g of random copolymer polypropylene, 40g of crystalline thermoplastic polyurethane, 17g of activated glass fiber, 10g of a compatibilizer, 1.5g of an antioxidant 1010, 1.5g of an ultraviolet absorber UV-326, and 1.5g of ethylene bisstearamide.

[0051] The activated glass fiber was prepared by the following steps: 10g of glass fiber with a fineness of 20-50μm was surface activated by plasma treatment equipment in an argon atmosphere, wherein the power density was 35W / m 2The mixture was added to 80 g of 55% ethanol aqueous solution and stirred for 80 seconds. Then 0.8 g of 1.5 mol / L hydrochloric acid was added. 5.5 g of tetrabutyl titanate was added thereto under stirring. The mixture was stirred at 45 ° C for 90 minutes at a stirring speed of 260 r / min. The mixture was filtered and dried with hot air at 130 ° C. A 9% KH570 coupling agent solution was sprayed on the surface and dried in vacuo.

[0052] The method for preparing the thermoplastic polyurethane film having a matting effect comprises the following steps: S1. Premix random copolymer polypropylene, crystalline thermoplastic polyurethane, compatibilizer, antioxidant 1010, ultraviolet absorber UV-326, and ethylene bisstearamide in a high-speed mixer for 3 minutes to obtain a premix; S2. Add the premix to the main feed port of the twin-screw extruder, add the activated glass fiber from the side feed port, and melt extrude. The processing temperature is 180°C.

[0053] The thickness of the thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2 was measured, and the thickness of the three films was 300±50 μm.

[0054] The haze of the thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2 was measured with reference to GB / T 2410-2008, "Determination of Light Transmittance and Haze of Transparent Plastics." The surface gloss of the thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2 was measured at a 60° angle with reference to GB / T 8807-1988, "Test Method for Specular Gloss of Plastics."

[0055] like Figure 1 As shown, the thermoplastic polyurethane film obtained in Example 5 has the highest haze and the lowest surface gloss, which is better than that of Comparative Examples 1-2 (P < 0.05).

[0056] The longitudinal tensile strength and tear strength of the thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2 were measured with reference to HG / T 5070-2016 “Thermoplastic Polyurethane (TPU) Films”.

[0057] like Figure 2 As shown, the tensile strength and elongation at break of the thermoplastic polyurethane film obtained in Example 5 are both the highest, which are better than those of Comparative Examples 1-2 (P < 0.05).

[0058] The Shore hardness of the thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2 was measured with reference to GB / T 531.1-2008, "Rubber, vulcanized or thermoplastic—Test method for indentation hardness—Part 1: Shore durometer method." The thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2 were subjected to a 1000-h xenon arc aging test with reference to GB / T 16422.3-2014, "Plastics—Test methods for laboratory light source exposure—Part 3: Xenon arc lamp." The yellowing level and haze retention of each sample were measured.

[0059] Table 1 Yellowing grade of thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2 after 1000h xenon lamp aging

[0060] like Figure 3 As shown in Table 1, the Shore hardness of the thermoplastic polyurethane film obtained in Example 5 was less than 90A, which was better than that of Comparative Examples 1-2 (P<0.05). The yellowing grade of the thermoplastic polyurethane film obtained in Example 5 was 1, which was better than that of Comparative Examples 1-2. The haze retention rate of the thermoplastic polyurethane film obtained in Example 5 was the highest, which was better than that of Comparative Examples 1-2 (P<0.05).

[0061] The thermoplastic polyurethane films obtained in Example 5 and Comparative Examples 1-2 were hot pressed onto the surface of cotton fabric, and then washed 10 times using a type A standard washing machine with reference to GB / T8629-2017 "Household Washing and Drying Procedure for Textile Testing". After hanging to dry, the surface gloss and haze were measured again, and the gloss change rate and haze retention rate were calculated.

[0062] like Figure 4 As shown, after washing, the haze retention rate of the thermoplastic polyurethane film obtained in Example 5 is the highest, while the gloss change rate is the smallest, which is better than that of Comparative Examples 1-2 (P < 0.05).

[0063] The applicant believes that this is due to the fact that the present invention utilizes a random copolymerized polypropylene and thermoplastic polyurethane compound to form a microphase separation structure, combined with a compatibilizer and controlled ratio of the three to moderately regulate the microphase structure, achieving effective water-wash resistance for the matte film while imparting softness and flexibility to the material, making it adaptable to the complex demands of curved surface decoration. The present invention treats glass fiber with argon plasma and then hydrolyzes it on its surface to form a SiO2 and TiO2 deposition layer. This not only provides extremely high bonding strength, but also creates strong bonding strength with the random copolymerized polypropylene and crystalline thermoplastic polyurethane, generating multiple light scattering centers dispersed therein. This effectively enhances film haze and reduces gloss, achieving a matte-like matte effect, while also significantly increasing the tensile strength of the finished product, resulting in excellent mechanical properties. The present invention incorporates a SiO2-TiO2 adhesion layer on the glass fiber surface, combined with the action of the crystalline thermoplastic polyurethane, to significantly reduce the system's UV transmittance, resulting in excellent aging resistance and high color fastness retention after washing, far exceeding that of traditional PE-based films.

[0064] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A thermoplastic polyurethane film with a matte effect, characterized in that: The raw materials include, by mass: 80-120 parts of random copolymer polypropylene, 30-50 parts of crystalline thermoplastic polyurethane, 8-26 parts of activated glass fiber, 5-15 parts of compatibilizer, 1-2 parts of antioxidant, 1-2 parts of light stabilizer, and 1-2 parts of lubricant; The activated glass fiber is prepared by the following steps: the glass fiber is plasma treated in an argon atmosphere for 50-100 seconds, added to an ethanol aqueous solution and stirred, followed by adding hydrochloric acid, and tetrabutyl titanate and ethyl orthosilicate are added thereto under stirring, stirred at 40-50° C. for 1-2 hours, filtered, dried, sprayed with a silane coupling agent solution on the surface, and vacuum dried.

2. The thermoplastic polyurethane film with matte effect according to claim 1, characterized in that: The compatibilizer is an amorphous α-olefin copolymer containing polypropylene groups in its main chain.

3. The thermoplastic polyurethane film with matte effect according to claim 1, characterized in that: The light stabilizer is a benzotriazole light stabilizer.

4. The thermoplastic polyurethane film with matte effect according to claim 1, characterized in that: The lubricant is calcium stearate and / or ethylene bisstearamide.

5. The thermoplastic polyurethane film with matte effect according to claim 1, characterized in that: The mass ratio of glass fiber, tetrabutyl titanate, ethyl orthosilicate and silane coupling agent is 5-15:1-5:1-4:0.05-0.

25.

6. The thermoplastic polyurethane film with matte effect according to claim 1, characterized in that: The fineness of the glass fiber is 20-50 μm, and the silane coupling agent is KH570 coupling agent.

7. The thermoplastic polyurethane film with matte effect according to claim 1, characterized in that: Plasma treatment power density is 30-40W / m 2 .

8. The thermoplastic polyurethane film with matte effect according to claim 1, characterized in that: The mass fraction of the silane coupling agent solution is 5-12.5%.

9. A method for preparing a thermoplastic polyurethane film with a matte effect according to any one of claims 1 to 8, characterized in that: The steps include: S1. Premixing random copolymer polypropylene, crystalline thermoplastic polyurethane, a compatibilizer, an antioxidant, a light stabilizer, and a lubricant for 1-5 minutes to obtain a premix; S2. Add the premix to the main feed port of the twin-screw extruder, add the activated glass fiber from the side feed port, and melt extrude.

10. The method for preparing a thermoplastic polyurethane film with a matte effect according to claim 9, characterized in that: The thickness of the thermoplastic polyurethane film is 100-500 μm.

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