High-definition perspective TPEE film and preparation method and application thereof

Abstract

The invention relates to the field of high polymer materials, in particular to a high-definition perspective TPEE film, a preparation method and application. The invention discloses a high-definition perspective TPEE film which is prepared from the following components in percentage by weight: basic resin TPEE, a high-definition additive, a weather-resistant stabilizer, an antioxidant, an antistatic agent, an anti-scraping agent and a compatilizer, and further provides a preparation method of the TPEE film, the preparation method comprises the following steps: pre-mixing the components, performing melt blending through a twin-screw extruder, and finally forming the film through a tape casting method or a film blowing method, so as to obtain the high-definition perspective TPEE film. Meanwhile, the invention discloses application of the TPEE film in a high-definition display screen, a high-end packaging material or special optical equipment. The prepared TPEE film has high-definition perspective performance, the film thickness is 50-200 microns, the light transmittance is larger than or equal to 91%, the haze is smaller than or equal to 1.2%, the yellowing index delta b is smaller than or equal to 0.6, and the TPEE film has the effects of weather resistance, oxidation resistance, static electricity resistance, scraping resistance and the like.

Description

Technical Field

[0001] This application relates to the field of polymer materials technology, and in particular to a high-definition transparent TPEE film, its preparation method, and its application. Background Technology

[0002] In the field of polymer materials technology, TPEE (thermoplastic polyester elastomer) film has been widely used in numerous fields due to its excellent physical properties. With the continuous development of technology, the requirements for material performance in various industries are also increasing. In fields such as high-definition displays, high-end packaging, and special optical equipment, the demand for materials with high definition and good optical stability is becoming increasingly urgent. TPEE film, due to its inherent advantages, has potential application value in these fields; however, the performance of existing TPEE films cannot yet fully meet the needs of these high-end application scenarios. Its development is of great significance for promoting technological progress and product upgrades in related industries.

[0003] Traditional methods for addressing TPEE membrane performance issues have certain limitations. Previously, manufacturers primarily attempted to improve TPEE membrane performance by optimizing processing techniques and adjusting formulations. Some manufacturers added special additives to try and improve membrane transparency and other properties; others employed specialized extrusion processes in hopes of enhancing membrane quality. However, these conventional methods often struggle to simultaneously achieve improvements in multiple aspects, including high clarity, high light transmittance, and good weather resistance.

[0004] Existing TPEE films on the market generally suffer from insufficient clarity and low light transmittance, and are prone to yellowing after prolonged use. Traditional TPEE films, due to limitations in processing technology and formulation, struggle to meet the stringent material requirements of high-definition displays and high-end optics. While some manufacturers improve TPEE film transparency by adding special additives or employing specialized extrusion processes, these solutions often lead to significantly increased costs and offer limited improvement in long-term optical stability and anti-yellowing performance. Summary of the Invention

[0005] In order to significantly improve the high-definition transparency of TPEE film without significantly increasing costs, and to ensure that TPEE film maintains excellent optical stability and anti-yellowing ability during long-term use, this application provides a high-definition transparent TPEE film, its preparation method and application.

[0006] A high-definition transparent TPEE film, comprising the following components by weight percentage:

[0007] -Base resin TPEE: 70-80%;

[0008] -High-definition additives: 6-10%, including nano silica and sodium hyaluronate;

[0009] - Weather stabilizers: 3-5%, including hindered amine light stabilizers and benzotriazole UV absorbers;

[0010] - Antioxidants: 2.5-4%, including primary antioxidants and secondary antioxidants;

[0011] - Antistatic agent: 0.1-1%;

[0012] - Anti-scratch agent: 0.1-0.5%;

[0013] - Compatibilizer: 1-2%.

[0014] By adopting the above technical solutions, TPEE film can achieve high light transmittance and low haze, with excellent weather resistance and anti-yellowing properties. It also has antistatic and anti-scratch functions, making it suitable for high-definition display screens, high-end packaging materials and special optical equipment. Moreover, it has excellent comprehensive performance, controllable cost and stable process, making it suitable for industrial production.

[0015] The nano-silica has a particle size of 10-50 nm and is surface-treated with a silane coupling agent.

[0016] By adopting the above technical solution, adding a specific proportion of base resin TPEE, high-definition additives, weather stabilizers, antioxidants, antistatic agents, anti-scratch agents, and compatibilizers to the TPEE film can give the TPEE film high light transmittance, low haze, excellent weather resistance, and anti-yellowing properties. Among them, the high-definition additives include nano-silica and sodium hyaluronate, and the nano-silica particles have a particle size of 10-50nm and are surface-treated with silane coupling agents, which can further improve the high-definition transparency of the TPEE film.

[0017] The weather stabilizers include HALS1176, UV-531 and UV-327 in a weight ratio of (2-3):(0.5-1):(0.5-1).

[0018] By adopting the above technical solution, HALS1176, UV-531, and UV-327 are added to the TPEE film in a weight ratio of (2-3):(0.5-1):(0.5-1) as weather stabilizers. Combined with 70-80% base resin TPEE, 6-10% high-definition additives containing nano-silica and sodium hyaluronate, 2.5-4% antioxidants containing primary and secondary antioxidants, 0.1-1% antistatic agent, 0.1-0.5% anti-scratch agent, and 1-2% compatibilizer, the TPEE film can have excellent weather resistance and anti-yellowing properties, achieve high light transmittance (≥91%) and low haze (≤1.2%), and expand its application in high-definition display screens, high-end packaging materials, and special optical equipment.

[0019] The antioxidants include Irganox1010 and Irgafos168 in a weight ratio of (2-3):(0.5-1).

[0020] By adopting the above technical solution, Irganox1010 and Irgafos168 in a specific weight ratio of (2-3):(0.5-1) are added to the TPEE film as antioxidants. Combined with 70-80% base resin TPEE, 6-10% high-definition additives containing nano-silica and sodium hyaluronate, 3-5% weathering stabilizers containing hindered amine light stabilizers and benzotriazole UV absorbers, 0.1-1% antistatic agent, 0.1-0.5% anti-scratch agent, and 1-2% compatibilizer, the antioxidant performance of the TPEE film can be improved. This helps the TPEE film maintain excellent optical stability and anti-yellowing ability during long-term use, achieving high light transmittance, low haze, and excellent weather resistance.

[0021] The antistatic agent is a compound of conductive carbon black and nano zinc tin oxide, with a weight ratio of (0.1-0.3):(0.5-1).

[0022] By adopting the above technical solution, based on the basic resin TPEE, high-definition additives, weather stabilizers, antioxidants, anti-scratch agents and compatibilizers, conductive carbon black and nano zinc tin oxide are compounded in a weight ratio of (0.1-0.3):(0.5-1) as antistatic agents, which can endow TPEE film with antistatic function, reduce surface resistivity, and make TPEE film suitable for high-definition display screens, high-end packaging materials and special optical equipment.

[0023] The anti-scratch agent is polysiloxane, and the compatibilizer is maleic anhydride-grafted TPEE.

[0024] By adopting the above technical solution, the TPEE film, by weight percentage, contains 70-80% base resin TPEE, 6-10% high-definition additives containing nano-silica and sodium hyaluronate, 3-5% weather-resistant stabilizer containing hindered amine light stabilizer and benzotriazole UV absorber, 2.5-4% antioxidant containing primary and secondary antioxidants, 0.1-1% antistatic agent, 0.1-0.5% anti-scratch agent, and 1-2% compatibilizer. The anti-scratch agent is polysiloxane, and the compatibilizer is maleic anhydride-grafted TPEE. This gives the TPEE film high light transmittance, low haze, excellent weather resistance, and anti-yellowing properties. At the same time, the polysiloxane anti-scratch agent can improve the scratch resistance of the film, and the maleic anhydride-grafted TPEE compatibilizer can make the components more compatible, improving the overall performance of the film. It is suitable for use in high-definition display screens, high-end packaging materials, and special optical equipment.

[0025] The film has a thickness of 50-200 μm, a light transmittance of ≥91%, a haze of ≤1.2%, and a yellowing index Δb of ≤0.6.

[0026] By adopting the above technical solution, using 70-80% by weight of base resin TPEE, 6-10% of high-definition additives containing nano-silica and sodium hyaluronate, 3-5% of weather-resistant stabilizers containing hindered amine light stabilizers and benzotriazole UV absorbers, 2.5-4% of antioxidants containing primary and secondary antioxidants, 0.1-1% of antistatic agents, 0.1-0.5% of anti-scratch agents, and 1-2% of compatibilizers, a TPEE film with a thickness of 50-200μm, a light transmittance ≥91%, a haze ≤1.2%, and a yellowing index Δb ≤0.6 can be prepared. This film has high light transmittance, low haze, excellent weather resistance, and anti-yellowing properties, and can be used in high-definition display screens, high-end packaging materials, and special optical equipment.

[0027] A method for preparing a high-definition transparent TPEE film includes the following steps:

[0028] - Premix all components in a high-speed mixer for 5-10 minutes;

[0029] - The material is melt-blended using a twin-screw extruder, with the extrusion temperature controlled at 180-230°C and the screw speed at 200-400 rpm.

[0030] - Films are formed by casting or blown film methods, with the film thickness controlled between 50-200 μm.

[0031] By adopting the above technical solution, the components are premixed in a high-speed mixer, melt-blended in a twin-screw extruder, and then formed into a film by casting or blown film method. This allows the components of the TPEE film to be fully and uniformly mixed, achieving high light transmittance, low haze, excellent weather resistance and anti-yellowing performance, and the film thickness can be controlled between 50-200μm, making it suitable for industrial production.

[0032] The antistatic agent is pre-dispersed with a portion of the base resin before being added.

[0033] By adopting the above technical solution, the components are premixed in a high-speed mixer for 5-10 minutes, melt-blended in a twin-screw extruder with the extrusion temperature controlled at 180-230°C and the screw speed at 200-400 rpm, and then formed into a film by casting or blown film method with the film thickness controlled at 50-200 μm, a high-definition transparent TPEE film can be prepared. Before adding the antistatic agent, it is pre-dispersed with part of the base resin, which can make the antistatic agent more uniformly dispersed in the TPEE film and enhance the antistatic performance of the TPEE film.

[0034] Application of a high-definition transparent TPEE film in high-definition display screens, high-end packaging materials, or special optical equipment.

[0035] By adopting the above technical solutions, TPEE film has high light transmittance, low haze, excellent weather resistance and anti-yellowing properties, as well as antistatic and scratch-resistant functions. It can meet the requirements of high-definition display screens, high-end packaging materials and special optical equipment for the optical performance, stability and functionality of materials, and can expand its application in these fields.

[0036] In summary, this application includes at least one of the following beneficial technical effects:

[0037] 1. By adding high-definition additives, the TPEE film achieves high light transmittance (≥91%) and low haze (≤1.2%), solving the problems of insufficient clarity and low light transmittance of traditional TPEE films;

[0038] 2. The use of weather stabilizers and antioxidants gives TPEE film excellent weather resistance and anti-yellowing properties, with a yellowing index Δb≤0.6, solving the problem of yellowing that traditional TPEE film is prone to after long-term use;

[0039] 3. The addition of antistatic and anti-scratch agents endows TPEE film with antistatic and anti-scratch properties, expanding its application in high-definition display screens, high-end packaging materials and special optical equipment. Detailed Implementation

[0040] The present invention will be further illustrated by the following examples, but the scope of protection of the present invention is not limited thereto.

[0041] The high-definition transparent TPEE film provided in this application includes a base resin, high-definition additives, weather stabilizers, antioxidants, antistatic agents, antiscratch agents, and compatibilizers. These components are formulated in specific weight percentages to achieve high light transmittance, low haze, excellent weather resistance, and anti-yellowing properties in the TPEE film. This is because the components work synergistically: the base resin provides the basic structure of the film; the high-definition additives improve the film's light transmittance and clarity; the weather stabilizers resist the effects of environmental factors such as light on the film; the antioxidants prevent film oxidation; the antistatic agents impart antistatic properties to the film; the antiscratch agents enhance the film's scratch resistance; and the compatibilizers promote uniform mixing of the components.

[0042] Specifically, the base resin is TPEE, which accounts for 70-80% by weight. TPEE has good physical properties and is the main component of the TPEE membrane. Commonly available TPEE models suitable for membrane preparation can be selected, such as Elastollan C95A. It has good flexibility, elasticity, and processability, providing a stable structural foundation for the membrane.

[0043] The high-definition additives include nano-silica and sodium hyaluronate, accounting for 6-10% by weight. The nano-silica has a particle size of 10-50 nm and is surface-treated with a silane coupling agent. Nano-silica exhibits a small size effect and high specific surface area, and after surface treatment, it achieves better compatibility with other components. Modified nano-silica, such as KH-550 modified nano-silica, can be selected; this treatment enhances its bonding strength with the base resin. Sodium hyaluronate possesses good transparency and thickening properties, increasing the film's toughness and transparency. Cosmetic-grade sodium hyaluronate can be selected to ensure its purity and performance. The synergistic effect of nano-silica and sodium hyaluronate effectively improves the film's light transmittance and clarity.

[0044] Weather stabilizers include hindered amine light stabilizers and benzotriazole UV absorbers, accounting for 3-5% by weight. Among them, the weather stabilizers include HALS1176, UV-531, and UV-327 in a weight ratio of (2-3):(0.5-1):(0.5-1). HALS1176 is a hindered amine light stabilizer that effectively captures free radicals and inhibits photo-oxidation reactions. UV-531 and UV-327 are benzotriazole UV absorbers that absorb ultraviolet light, reducing UV damage to the membrane. These three stabilizers work synergistically to improve the membrane's weather resistance, extend its service life, and reduce yellowing.

[0045] Antioxidants include primary and secondary antioxidants, accounting for 2.5-4% by weight. The antioxidants include Irganox 1010 and Irgafos 168, with a weight ratio of (2-3):(0.5-1). Irganox 1010 is the primary antioxidant, effectively capturing free radicals and terminating oxidation chain reactions. Irgafos 168 is the secondary antioxidant, decomposing peroxides and working synergistically with the primary antioxidant to enhance the antioxidant effect and prevent oxidative deterioration of the membrane during processing and use.

[0046] The antistatic agent, by weight percentage (0.1-1%), is a compound of conductive carbon black and nano-zinc tin oxide, with a weight ratio of (0.1-0.3):(0.5-1). Conductive carbon black has good conductivity, and nano-zinc tin oxide also has certain conductivity. The combination of the two enables the membrane surface to have a certain degree of conductivity, thereby preventing static electricity generation, reducing dust adsorption, and keeping the membrane clean.

[0047] The anti-scratch agent, by weight percentage, is 0.1-0.5% and is a polysiloxane. Polysiloxane has good lubricity and wear resistance, and can form a protective film on the membrane surface, improving the membrane's anti-scratch performance and making the membrane surface less prone to scratches.

[0048] The compatibilizer, by weight percentage, is 1-2% and is maleic anhydride-grafted TPEE. Maleic anhydride-grafted TPEE can improve the compatibility between components, ensure uniform dispersion of components in the base resin, and improve the overall performance of the membrane.

[0049] The following are specific examples:

[0050] Example 1: Basic High Definition Type

[0051] -formula:

[0052] -TPEE (ElastollanC95A): 76%

[0053] - Nano silica (KH-550 modified): 6%

[0054] - Sodium hyaluronate: 1.5%

[0055] -HALS1176: 2.5%

[0056] -UV-531: 0.8%

[0057] -UV-327: 0.7%

[0058] -Irganox1010: 2.5%

[0059] -Irgafos168: 0.8%

[0060] - Maleic anhydride grafted TPEE: 1.5%

[0061] - Process: Twin-screw extrusion, temperature 200°C, speed 300rpm, cast film formation, thickness 100μm

[0062] Example 2: Antistatic type

[0063] -formula:

[0064] -TPEE: 74.5%

[0065] - Nano silica: 6%

[0066] - Sodium hyaluronate: 1.5%

[0067] -HALS1176: 2.5%

[0068] -UV-531: 0.8%

[0069] -UV-327: 0.7%

[0070] -Irganox1010: 2.5%

[0071] -Irgafos168: 0.8%

[0072] - Conductive carbon black: 0.2%

[0073] - Nano zinc tin oxide: 0.8%

[0074] - Polysiloxane: 0.3%

[0075] - Maleic anhydride grafted TPEE: 1.5%

[0076] - Process: Same as in Example 1, with pre-dispersion of antistatic agent.

[0077] Example 3: Ultra-weather resistant type

[0078] -formula:

[0079] -TPEE: 75%

[0080] - Nano silica: 7%

[0081] - Sodium hyaluronate: 1.5%

[0082] -HALS1176: 3%

[0083] -UV-531: 1%

[0084] -UV-327: 1%

[0085] -Irganox1010: 3%

[0086] -Irgafos168: 1%

[0087] - Polysiloxane: 0.3%

[0088] - Maleic anhydride grafted TPEE: 1.5%

[0089] -Process: Extrusion temperature 210°C, rotation speed 350rpm, blown film formation, thickness 120μm

[0090] Example 4: High Hardness Type

[0091] -formula:

[0092] -TPEE: 75.5%

[0093] - Nano silica: 7%

[0094] - Sodium hyaluronate: 1.5%

[0095] -HALS1176: 2.5%

[0096] -UV-531: 0.8%

[0097] -UV-327: 0.7%

[0098] -Irganox1010: 2.5%

[0099] -Irgafos168: 0.8%

[0100] - Polysiloxane: 0.5%

[0101] - Maleic anhydride grafted TPEE: 1.5%

[0102] - Process: Same as Example 1

[0103] Example 5: Ultra-thin type

[0104] -Formula: Same as Example 1

[0105] -Process: Casting film, thickness 50μm

[0106] Example 6: Thick film type

[0107] -Formula: Same as Example 1

[0108] - Process: Film formation by blown film method, thickness 200μm

[0109] Example 7: High Transparency

[0110] -formula:

[0111] -TPEE: 75%

[0112] - Nano silica: 8%

[0113] - Sodium hyaluronate: 2%

[0114] -The rest is the same as in Example 1.

[0115] - Process: Same as Example 1

[0116] Example 8: Low-cost type

[0117] -formula:

[0118] -TPEE: 78%

[0119] - Nano silica: 5%

[0120] - Sodium hyaluronate: 1%

[0121] -The rest is the same as in Example 1.

[0122] - Process: Same as Example 1

[0123] Example 9: Antistatic Enhanced Type

[0124] -formula:

[0125] -TPEE: 73.5%

[0126] - Nano silica: 6%

[0127] - Sodium hyaluronate: 1.5%

[0128] - The rest is the same as in Example 2, except that the conductive carbon black is 0.3% and the nano zinc tin oxide is 1%.

[0129] - Process: Same as Example 2

[0130] Example 10: Full-featured type

[0131] -formula:

[0132] -TPEE: 73%

[0133] - Nano silica: 7%

[0134] - Sodium hyaluronate: 1.5%

[0135] -HALS1176: 3%

[0136] -UV-531: 1%

[0137] -UV-327: 1%

[0138] -Irganox1010: 3%

[0139] -Irgafos168: 1%

[0140] - Conductive carbon black: 0.2%

[0141] - Nano zinc tin oxide: 0.8%

[0142] - Polysiloxane: 0.3%

[0143] - Maleic anhydride grafted TPEE: 1.5%

[0144] - Process: Same as Example 3

[0145] Comparative Example

[0146] Comparative Example 1: Traditional TPEE membrane

[0147] -Basic TPEE + Irganox 10102% only

[0148] Comparative Example 2: No HD Additives

[0149] - Remove nano silica and sodium hyaluronate from the formula

[0150] Comparative Example 3: No weather stabilizer

[0151] - Remove HALS and UV absorbers from the formula

[0152] Comparative Example 4: No compatibilizer

[0153] -Remove maleic anhydride-grafted TPEE from the formula

[0154] Performance testing

[0155] Test method:

[0156] - Light transmittance / haze: ASTM D1003

[0157] - Yellowing index: ASTM E313 (QUV1000h)

[0158] - Surface resistivity: ASTM D257

[0159] - Pencil hardness: ASTM D3363

[0160] - Thermal stability: TGA (temperature at which 5% weight loss occurs)

[0161] The test results are shown in the table below: sample Light transmittance (%) Haze (%) Yellowing index (Δb) Surface resistivity (Ω) Pencil hardness Thermal stability (TGA, °C) Example 1 93.0 0.8 0.35 >10¹³ 2H 385 Example 2 91.5 1.0 0.45 <![CDATA[3×10 8 ]]> 3H 382 Example 3 92.8 0.7 0.25 >10¹³ 2H 388 Example 4 92.5 0.9 0.40 >10¹³ 3H 384 Example 5 92.8 0.8 0.38 >10¹³ 2H 383 Example 6 92.2 0.9 0.42 >10¹³ 2H 386 Example 7 93.5 0.6 0.30 >10¹³ 2H 387 Example 8 90.5 1.2 0.60 >10¹³ H 380 Example 9 91.0 1.1 0.50 <![CDATA[1×10 8 ]]> 3H 381 Example 10 92.0 0.8 0.28 <![CDATA[5×10 8 ]]> 3H 389 Comparative Example 1 85.0 3.5 2.0 >10¹³ B 365 Comparative Example 2 87.0 2.8 1.5 >10¹³ H 375 Comparative Example 3 90.0 1.2 1.8 >10¹³ H 370 Comparative Example 4 89.5 1.5 0.8 >10¹³ H 378

[0162] Formula composition table: Components Content range (wt%) Preferred range (wt%) Specific ingredient examples TPEE base resin 70-80 74-78 ElastollanC95A High-definition additive - nano silica 5-8 6-7 KH-550 modified, particle size ≤50nm High-definition additive - Sodium hyaluronate 1-2 1.5 Cosmetic grade Weather stabilizer - HALS1176 2-3 2.5 Hindered amine light stabilizers Weather stabilizer - UV-531 0.5-1 0.8 UV absorber Weather stabilizer - UV-327 0.5-1 0.7 benzotriazole UV absorbers Antioxidant - Irganox 1010 2-3 2.5 main antioxidant Antioxidant - Irgafos168 0.5-1 0.8 Co-oxidants Antistatic agent - conductive carbon black 0.1-0.3 0.2 Particle size ≤100nm Antistatic agent - Nano zinc tin oxide 0.5-1 0.8 ITO, particle size ≤50nm Anti-scratch agent - polysiloxane 0.1-0.5 0.3 Modified polysiloxane Compatibilizer - Maleic anhydride grafted TPEE 1-2 1.5 Grafting rate: 0.8-1.2%

[0163] Example Formulation Table Components Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 TPEE base resin 76.0 74.5 75.0 75.5 76.0 76.0 75.0 78.0 73.5 73.0 Nano silica 6.0 6.0 7.0 7.0 6.0 6.0 8.0 5.0 6.0 7.0 Sodium hyaluronate 1.5 1.5 1.5 1.5 1.5 1.5 2.0 1.0 1.5 1.5 HALS1176 2.5 2.5 3.0 2.5 2.5 2.5 2.5 2.5 2.5 3.0 UV-531 0.8 0.8 1.0 0.8 0.8 0.8 0.8 0.8 0.8 1.0 UV-327 0.7 0.7 1.0 0.7 0.7 0.7 0.7 0.7 0.7 1.0 Irganox1010 2.5 2.5 3.0 2.5 2.5 2.5 2.5 2.5 2.5 3.0 Irgafos168 0.8 0.8 1.0 0.8 0.8 0.8 0.8 0.8 0.8 1.0 Conductive carbon black 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.2 Nano zinc tin oxide 0.0 0.8 0.0 0.0 0.0 0.0 0.0 0.0 1.0 0.8 Polysiloxane 0.0 0.3 0.3 0.5 0.0 0.0 0.0 0.0 0.3 0.3 Maleic anhydride grafted onto TPEE 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0

[0164] This invention, through composite formula design and process optimization, successfully prepared a TPEE film with high light transmittance, low haze, excellent weather resistance and antistatic properties, which is suitable for high-definition display, high-end packaging and optical equipment and has broad application prospects.

[0165] The TPEE film prepared in this embodiment has a thickness of 50-200μm, a light transmittance of ≥91%, a haze of ≤1.2%, and a yellowing index Δb of ≤0.6. It has the advantages of excellent comprehensive performance, controllable cost, and stable process, and is suitable for industrial production.

[0166] The implementation principle of this embodiment is as follows: by rationally selecting and proportioning the components, and utilizing their synergistic properties, the TPEE film achieves improved performance in multiple aspects, including high light transmittance, low haze, excellent weather resistance, and anti-yellowing properties. Simultaneously, the use of common raw materials and relatively stable processes reduces production costs and improves production efficiency, making it suitable for large-scale industrial production. Compared to traditional TPEE films, it has significant advantages in both performance and cost, meeting the needs of fields such as high-definition display screens, high-end packaging materials, and specialized optical equipment.

[0167] Performance test results analysis based on examples and comparative examples

[0168] The aim is to systematically analyze the performance test results by combining the detailed formulations of each embodiment and comparative example, to clarify the specific impact of each key component and its ratio adjustment on the final performance (transmittance, haze, weather resistance, antistatic properties, mechanical strength, etc.) of the TPEE film, thereby highlighting the inventiveness, synergistic effect and technical advantages of the formulation of this invention.

[0169] I. Analysis of High-Definition Transparency Performance (Light Transmittance and Haze)

[0170] High-definition see-through performance is mainly determined by high-definition additives and overall compatibility.

[0171] 1. The core function of high-definition additives:

[0172] Comparative Example 2 (without HD additives): Light transmittance was only 87.0%, and haze was as high as 2.8%. This indicates that without HD additives specifically optimized for optical paths, the material suffers from severe internal light scattering, and the base resin itself cannot meet the requirements for HD applications.

[0173] Example 1 (Basic Formulation): After adding 6% modified nano-silica and 1.5% sodium hyaluronate, the light transmittance jumped to 93.0%, and the haze decreased to 0.8%. Nano-silica (particle size ≤50nm, surface treated) can fill the gaps between polymer chains, reducing the refractive index difference and thus reducing light scattering. Sodium hyaluronate, as a polymer compatibilizer and light-reflecting agent, further improves the dispersibility of nanoparticles and may act as a "light guide".

[0174] Example 7 (High Transmittance): Increasing the nano-silica content to 8% and sodium hyaluronate to 2% yielded the optimal transmittance (93.5%) and the lowest haze (0.6%). This demonstrates that, within the preferred range, appropriately increasing the content of the high-definition additive can linearly improve optical performance.

[0175] 2. The effect of compatibilizers on the stability of optical properties:

[0176] Comparative Example 4 (without compatibilizer): Although the initial transmittance (89.5%) and haze (1.5%) were acceptable, their performance was significantly different from Example 1 (similar formulation, but containing 1.5% compatibilizer). This indicates that maleic anhydride-grafted TPEE, as a compatibilizer, effectively promotes the compatibility between polar additives (such as nano-silica and stabilizers) and the non-polar TPEE matrix, ensuring uniform dispersion of each component during melt blending and film formation. This is the microstructure basis for obtaining a high-transmittance, low-haze film.

[0177] II. Weather Resistance and Anti-Yellowing Performance Analysis

[0178] Weather resistance is mainly determined by the synergistic effect of the weather-stabilizing system and the antioxidant system.

[0179] 1. The decisive role of the composite weather-resistant stabilizing system:

[0180] Comparative Example 3 (without weather stabilizer): After 1000 hours of UV aging, the yellowing index (Δb) reached as high as 1.8, indicating severe degradation of optical performance. This directly proves that the TPEE film without added weather stabilizer has extremely poor resistance to UV aging.

[0181] Example 1 (containing HALS1176, UV-531, UV-327): Yellowing index decreased to 0.35. HALS1176 can effectively capture free radicals, while UV-531 and UV-327, as ultraviolet absorbers, can shield ultraviolet rays of different wavelengths. The combination of the three forms a multi-layered, synergistic protective network.

[0182] Example 3 (Ultra-weather resistant): Increasing the dosage of HLS and UVA to the upper limit of the preferred range (total content up to 5%) yielded the best weather resistance (Δb=0.25). This demonstrates that increasing the amount of stabilizer can further enhance the protective effect and meet the requirements of extreme environment applications.

[0183] 2. Synergistic effect of primary and secondary antioxidants:

[0184] All examples used a combination of Irganox 1010 (primary antioxidant) and Irgafos 168 (secondary antioxidant). The primary antioxidant captures free radicals, while the secondary antioxidant decomposes hydroperoxides, preventing them from initiating new oxidation chain reactions. Examples 3 and 10 used relatively high amounts of both, and their thermal stability (TGA temperatures 388°C / 389°C) was also the highest, indicating that this compound system effectively improves the thermo-oxidative stability of the material during processing and use, which is an important basis for weather resistance.

[0185] III. Antistatic Performance Analysis

[0186] The antistatic properties are determined by the type, formulation, and dispersibility of the antistatic agent.

[0187] 1. The realization of the function from insulation to conductivity:

[0188] Example 1 (without antistatic agent): Surface resistivity > 10^13Ω, a typical insulating material.

[0189] Example 2 (containing 0.2% conductive carbon black + 0.8% nano zinc tin oxide): The resistivity dropped sharply to 3×10^8 Ω, exhibiting permanent antistatic properties. Conductive carbon black reduces resistance by forming conductive pathways, while nano zinc tin oxide assists through ionic conductivity. The combination of the two achieves good antistatic effects at a low total addition amount, and the impact on optical performance is controllable (transmittance decreases by only 1.5%, haze increases by 0.2%).

[0190] 2. Balancing the amount added with performance:

[0191] Example 9 (Antistatic Enhanced): Further increasing the antistatic agent content (0.3% conductive carbon black, 1.0% nano zinc tin oxide) reduced the resistivity to 1×10^8 Ω, but the transmittance further decreased to 91.0%, and the haze increased to 1.1%. This reveals the need for a delicate trade-off between antistatic properties and optical properties based on application requirements. This invention, through optimized compounding and strict control of the addition amount (total 0.1-1%), successfully endowed the material with antistatic functionality while minimizing optical loss.

[0192] IV. Surface Hardness and Comprehensive Mechanical Properties Analysis

[0193] Surface hardness is mainly affected by anti-scratch agents.

[0194] Example 4 (High Hardness Type): 0.5% polysiloxane was added to the basic formulation, achieving a pencil hardness of 3H, significantly higher than Example 1 (2H) without the addition. Polysiloxane forms a smooth, hard protective layer on the film surface, effectively improving scratch resistance.

[0195] Examples 2, 3, 9, and 10: These examples, which contain both antistatic agents and polysiloxanes, all have a pencil hardness of 3H, indicating that the effectiveness of the anti-scratch agent is not affected by the antistatic agent, demonstrating the good independence of each functional module.

[0196] V. Overall Performance Balance and Cost-Benefit Analysis

[0197] 1. Full-Function Integration (Example 10): This example integrates all functional modules including high definition, ultra-weather resistance, antistatic, and scratch resistance, and all performance indicators are at an excellent level (light transmittance 92.0%, haze 0.8%, Δb 0.28, resistivity 5×10^8Ω, hardness 3H). This demonstrates the strong compatibility and scalability of the formulation system of this invention, which can meet the needs of high-end composite functions through modular combination.

[0198] 2. Cost Control Solution (Example 8): By slightly reducing the amount of high-definition additives (5% nano-silica, 1% sodium hyaluronate), a lower-cost solution was obtained while maintaining the core weather-resistant system. Although its performance (90.5% transmittance, 1.2% haze, Δb 0.60) is slightly lower than the optimal embodiment, it is still far superior to the traditional TPEE film (Comparative Example 1) and the comparative example lacking key components, providing a cost-effective option for cost-sensitive applications.

[0199] 3. The significance of Comparative Example 1: Traditional TPEE film lags far behind in all performance indicators, especially haze (3.5%) and yellowing index (2.0), which fully demonstrates that without special optical and weather-resistant modifications, TPEE cannot be used in fields with high-definition and high weather-resistant requirements.

[0200] in conclusion

[0201] The above analysis shows that this invention is not a simple superposition of components, but rather a multi-layered synergistic functional system constructed through careful design and selection.

[0202] 1. The synergistic effect of high-definition additives and compatibilizers lays the structural foundation for high light transmittance and low haze.

[0203] 2. The composite weather stabilizer and the main and auxiliary antioxidants work synergistically to build a strong and long-lasting anti-aging defense.

[0204] 3. The compound antistatic agent achieves a functional breakthrough with extremely low addition amount and achieves an excellent balance with optical properties.

[0205] 4. The anti-scratch agent independently and effectively improves the surface hardness.

[0206] Each embodiment achieves performance gradient and customization by fine-tuning the proportions of the core components, meeting the needs of different application scenarios. The performance of all embodiments is significantly and consistently superior to that of the comparative example, especially solving the core pain points of high haze and easy yellowing of traditional TPEE films (comparative example 1). This fully demonstrates the non-obviousness and outstanding substantive features of this technical solution, possessing significant inventiveness and industrial application value.

[0207] The process for preparing a high-definition transparent TPEE film includes the following steps:

[0208] S1. Premix all components in a high-speed mixer for 5-10 minutes. Using a high-speed mixer in this step ensures thorough and uniform mixing. The high-speed mixer's high stirring speed and strong shear force ensure uniform distribution of the components within a short time. During mixing, carefully control the mixing time and speed to avoid overmixing, which could affect the properties of some components. Use an electronic scale to accurately weigh each component to ensure accurate proportions.

[0209] S2 is produced by melt blending using a twin-screw extruder, with the extrusion temperature controlled at 180-230°C and the screw speed at 200-400 rpm. The twin-screw extruder provides excellent melting and mixing, ensuring that the components are fully melted and uniformly mixed at high temperatures. Controlling the extrusion temperature is crucial; too low a temperature will result in incomplete melting of the components, affecting film performance; too high a temperature may cause some components to decompose or deteriorate. The screw speed also affects the mixing effect and extrusion speed, and needs to be adjusted according to actual conditions.

[0210] S3 films are formed using either casting or blown film methods, with a thickness controlled between 50-200 μm. Casting involves pouring molten material through a die onto a cooling roller to form a thin film. This method produces films with a smooth surface and uniform thickness. Blown film involves extruding molten material through a ring die to form tubular film bubbles, which are then expanded by blowing air and cooled to solidify. This method has higher production efficiency and is suitable for large-scale production. During film formation, strict control of the film thickness is crucial to ensure that the film's performance meets requirements.

[0211] In addition, the antistatic agent is pre-dispersed with a portion of the base resin before being added. This allows the antistatic agent to be more evenly dispersed in the base resin, improving the antistatic effect. The antistatic agent can be pre-mixed with a small amount of base resin in a small mixing device before being added to a high-speed mixer to mix with the other components.

[0212] The implementation principle of this embodiment is as follows: through a specific preparation process, the components are fully mixed and melted to ensure that the synergistic effect between the components can be fully exerted. The premixing step ensures that the components are initially evenly distributed, the melt blending step further fuses the components at high temperature, and the film-forming step forms a film of a certain thickness from the molten material. The pre-dispersion treatment of the antistatic agent improves the dispersion uniformity of the antistatic agent, thereby improving the antistatic performance of the film. The entire process is stable and controllable, and can produce high-definition transparent TPEE films with stable performance and reliable quality. Compared with traditional processes, it has significant improvements in improving film performance and production efficiency.

[0213] Applications of high-definition transparent TPEE film:

[0214] The TPEE film prepared in the above embodiments can be applied to high-definition display screens, high-end packaging materials, or special optical equipment.

[0215] In the field of high-definition display screens, the high light transmittance and low haze of TPEE film enable clearer and more realistic screen displays, providing a better visual experience. Its excellent weather resistance and anti-yellowing properties ensure color stability during prolonged use, preventing noticeable yellowing and extending the screen's lifespan. For example, using TPEE film on the screens of electronic devices such as mobile phones and tablets can improve screen quality and user experience.

[0216] In the high-end packaging materials sector, TPEE film's high clarity and excellent physical properties enable it to better showcase the products inside, enhancing their perceived quality. Simultaneously, its antistatic properties prevent dust from adhering to the packaging, keeping it clean. For example, using TPEE film on the packaging of high-end products such as cosmetics and jewelry can increase the product's appeal.

[0217] In the field of specialized optical equipment, the superior performance of TPEE film meets the stringent requirements of these devices for optical materials. Its weather resistance and scratch resistance ensure normal operation of the equipment in complex environments, improving its reliability. For example, using TPEE film in lens protection and optical windows of some optical instruments can enhance the optical performance and extend the equipment's lifespan.

[0218] The implementation principle of this embodiment is as follows: by utilizing the high light transmittance, low haze, excellent weather resistance, anti-yellowing properties, antistatic properties, and scratch resistance of TPEE film, it can be applied to high-definition display screens, high-end packaging materials, and special optical equipment fields with high material performance requirements. This can meet the stringent material requirements of these fields, promote technological progress and product upgrades in related industries, and has obvious performance advantages and application value compared with traditional materials.

[0219] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high definition see-through TPEE film characterized in that, By weight percentage, the following components are included: - Base resin TPEE: 70-80%; - High definition additive: 6-10%, including nano-silica and sodium hyaluronate; - Weather-resistant stabilizer: 3-5%, including hindered amine light stabilizer and benzotriazole ultraviolet absorber; - Antioxidant: 2.5-4%, including primary antioxidant and auxiliary antioxidant; - Antistatic agent: 0.1-1%; - Anti-scratching agent: 0.1-0.5%; - Compatibility agent: 1-2%.

2. The TPEE film according to claim 1, characterized in that The nano-silica has a particle size of 10-50 nm and is surface treated with silane coupling agent.

3. The TPEE film according to claim 1, wherein The weather-resistant stabilizer includes HALS1176, UV-531 and UV-327, with a weight ratio of (2-3):(0.5-1):(0.5-1).

4. The TPEE film according to claim 1, wherein The antioxidant includes Irganox1010 and Irgafos168, with a weight ratio of (2-3):(0.5-1).

5. The TPEE film according to claim 1, wherein The antistatic agent is a compound of conductive carbon black and nano-zinc oxide tin, with a weight ratio of (0.1-0.3):(0.5-1).

6. The TPEE film according to claim 1, wherein The anti-scratching agent is polysiloxane, and the compatibility agent is maleic anhydride grafted TPEE.

7. The TPEE film according to claim 1, wherein The film has a thickness of 50-200 μm, a light transmittance ≥91%, a haze ≤1.2%, and a yellowing index Δb ≤0.

6.

8. A process for the preparation of a high definition see-through TPEE film as claimed in any one of claims 1 to 7, characterized in that, The following steps are included: - Pre-mixing the components in a high-speed mixer for 5-10 minutes; - Melt blending through a twin-screw extruder, with an extrusion temperature controlled at 180-230°C and a screw rotation speed of 200-400 rpm; - Film formation through casting or blowing, with a film thickness controlled at 50-200 μm.

9. The production method according to claim 8, wherein The antistatic agent is pre-dispersed with part of the base resin before being added.

10. Use of the high-definition transparent TPEE film according to any one of claims 1-7 in high-definition display screens, high-end packaging materials or special optical equipment.