A polypropylene material, a method for producing the same and an article

Abstract

This invention discloses a polypropylene material, its preparation method, and the product thereof. The polypropylene material comprises the following components in parts by weight: 45-85 parts block copolymer polypropylene and 20-50 parts polyethylene composite; wherein the block copolymer polypropylene has an EPR content ≥19% and an EPR weight-average molecular weight ≤370,000; the polyethylene composite comprises high-density polyethylene and linear low-density polyethylene. The polypropylene material of this invention possesses both high gloss and high impact strength properties.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, and more specifically, to a polypropylene material, its preparation method, and its products. Background Technology

[0002] Polypropylene (PP) is widely used in the automotive industry, home electronics, packaging, and building materials sectors due to its advantages such as low density, good heat resistance, and low cost. For example, it is used to manufacture automotive parts, appliance housings, and tricycle body panels. However, PP products used in automotive parts, appliance housings, and tricycle body panels often require high gloss and high impact strength. High gloss PP products have a more refined and textured appearance, enhancing their visual appeal and meeting consumer aesthetic demands. It can also partially conceal minor surface imperfections that may occur during production. Furthermore, the smoother surface of high-gloss PP products makes them less prone to dirt and dust adhesion and easier to clean – a highly practical attribute for appliance housings and frequently exposed automotive parts and tricycle body panels. High impact strength PP products can better withstand impacts and drops, reducing the likelihood of cracking or breakage and extending the lifespan of PP products used in automotive parts, appliance housings, and tricycle body panels.

[0003] Therefore, it is of great significance to develop a polypropylene material that combines high gloss and high impact strength. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and to provide a polypropylene material, its preparation method, and the product thereof.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a polypropylene material comprising the following components in parts by weight: 45-85 parts block copolymer polypropylene (PP-B), 20-50 parts polyethylene compound; In the block copolymer polypropylene (PP-B), the EPR content is ≥19%, and the weight-average molecular weight of EPR (M) is ≥19%. W ≤370,000; The polyethylene compound includes high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE).

[0006] The polypropylene material of the present invention possesses both high gloss and high impact strength properties, specifically: It has a specific EPR content and EPR weight-average molecular weight (M). WBlock copolymer polypropylene (PP-B) exhibits EPR molecular chains that can entangle with high-density polyethylene (HDPE) with very few short branches and linear low-density polyethylene (LLDPE) with a large number of short branches. This promotes the dispersion of the EPR phase in the system, making the EPR phase more extended and uniformly dispersed. This reduces the differences between phase interfaces, making light diffract more easily and reducing diffuse reflection at the phase interfaces, thereby improving the gloss of the polypropylene material. At the same time, because the EPR phase is more extended and uniformly dispersed in the system, the toughening zone in the system is increased, thus improving the impact strength of the polypropylene material (including impact strength at room temperature and low temperature).

[0007] The reason why high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE) were chosen for the polyethylene composite of this invention, instead of low-density polyethylene (LDPE), is that the long branch lengths of LDPE are not fixed and the size is large, which will generate greater steric hindrance. This means that LDPE cannot be smoothly embedded between the EPR molecular chains of PP-B and entangled with the EPR molecular chains as smoothly as HDPE with very few short branches and LLDPE with a large number of short branches. Moreover, its own long branches are prone to self-entanglement, reducing the chance of entanglement between LDPE and the EPR molecular chains of PP-B. As a result, the EPR phase of PP-B cannot be more spread out and more uniformly dispersed in the system, which is not conducive to improving the gloss and impact strength of polypropylene materials.

[0008] Preferably, the EPR content in the block copolymer polypropylene (PP-B) is 19-35%, such as a range of one or any two of the following: 19%, 19.5%, 20%, 20.5%, 20.7%, 21%, 21.5%, 22%, 22.5%, 23%, 23.5%, 24%, 24.2%, 24.3%, 24.5%, 25%, 26%, 27%, 27.2%, 27.3%, 27.5%, 28%, 29%, 30%, 31%, 33%, and 35%.

[0009] More preferably, the block copolymer polypropylene (PP-B) contains 20-28% EPR.

[0010] In one embodiment, the mass percentage of ethylene content in the EPR (rubber phase) of the block copolymer polypropylene (PP-B) can be 40-53%, such as a range of one or any two of the following: 40%, 40.5%, 41%, 41.5%, 42%, 42.5%, 43%, 43.5%, 44%, 44.5%, 45%, 45.5%, 46%, 46.5%, 47%, 47.5%, 48%, 48.5%, 49%, 49.5%, 50%, 50.5%, 51%, 51.5%, 52%, 52.5%, and 53%.

[0011] Preferably, in the block copolymer polypropylene (PP-B), the weight-average molecular weight (M) of EPR is... W The range is from 50,000 to 370,000, specifically one or any two of the following: 50,000, 60,000, 70,000, 80,000, 90,000, 100,000, 120,000, 130,000, 150,000, 170,000, 180,000, 190,000, 194,000, 195,000, 200,000, 220,000, 230,000, 250,000, 255,000, 260,000, 270,000, 280,000, 300,000, 310,000, 320,000, 330,000, 340,000, 345,000, 349,000, 350,000, 360,000, and 370,000.

[0012] Preferably, in the block copolymer polypropylene (PP-B), the weight-average molecular weight (M) of EPR is... W The range is 190,000 to 350,000.

[0013] In this invention, the EPR content test method in the block copolymer polypropylene (PP-B) is as follows: add M1 (unit g) of block copolymer polypropylene (PP-B) to xylene, heat and reflux at 135°C for 90 min, cool and crystallize, filter, take the filtrate, evaporate and dry, weigh the mass of the dried substance, and record it as M2 (unit g). Then, the EPR (ethylene propylene diene monomer rubber) content (%) in the block copolymer polypropylene (PP-B) is = M2 / M1×100%.

[0014] In this invention, the weight-average molecular weight (M) of the EPR in the block copolymer polypropylene (PP-B) is... W The test method is as follows: Block copolymer polypropylene (PP-B) is added to xylene, heated under reflux at 135℃ for 90 min, cooled to crystallize, filtered, and the filtrate is evaporated and dried. The weight-average molecular weight (Mn) of the dried substance is measured by gel permeation chromatography (GPC, volume exclusion chromatography) according to GB / T 36214.4-2018 standard. W ).

[0015] In this invention, the melt flow rate (melt mass flow rate, MFR) of the block copolymer polypropylene (PP-B) at 230°C and 2.16 kg is 15-35 g / 10 min, which can be obtained by testing according to ISO 1133-1-2022 standard.

[0016] For example, the melt flow rate (melt mass flow rate, MFR) of the block copolymer polypropylene (PP-B) at 230°C and 2.16 kg is a range of one or any two of the following values: 15 g / 10 min, 16 g / 10 min, 17 g / 10 min, 18 g / 10 min, 19 g / 10 min, 20 g / 10 min, 21 g / 10 min, 22 g / 10 min, 23 g / 10 min, 24 g / 10 min, 25 g / 10 min, 26 g / 10 min, 27 g / 10 min, 28 g / 10 min, 29 g / 10 min, 30 g / 10 min, 31 g / 10 min, 32 g / 10 min, 33 g / 10 min, 34 g / 10 min, and 35 g / 10 min.

[0017] Preferably, the weight ratio of high-density polyethylene (HDPE) to linear low-density polyethylene (LLDPE) is (0.1-3):1, specifically (0.2-3):1.

[0018] Preferably, the weight ratio of the high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE) is one or any two of the following: 0.1:1, 0.2:1, 0.3:1, 0.4:1, 0.5:1, 0.6:1, 0.7:1, 0.8:1, 0.9:1, 1:1, 1.2:1, 1.3:1, 1.5:1, 1.7:1, 1.8:1, 2:1, 2.2:1, 2.3:1, 2.5:1, 2.7:1, 2.8:1, and 3:1.

[0019] More preferably, the weight ratio of the high-density polyethylene (HDPE) to the linear low-density polyethylene (LLDPE) is (1-2):1.

[0020] Preferably, the high-density polyethylene (HDPE) has a melt flow rate (melt mass flow rate, MFR) of ≥5g / 10min under the conditions of 190℃ and 2.16kg, and more specifically, it can be ≥7g / 10min.

[0021] Preferably, the melt flow rate (melt mass flow rate, MFR) of the high-density polyethylene (HDPE) at 190°C and 2.16 kg is one or any two of the following values: 5 g / 10 min, 6 g / 10 min, 7 g / 10 min, 8 g / 10 min, 9 g / 10 min, 10 g / 10 min, 12 g / 10 min, 13 g / 10 min, 15 g / 10 min, 17 g / 10 min, 18 g / 10 min, 20 g / 10 min, 22 g / 10 min, 23 g / 10 min, 25 g / 10 min, 27 g / 10 min, 28 g / 10 min, and 30 g / 10 min.

[0022] More preferably, the melt flow rate (melt mass flow rate, MFR) of the high-density polyethylene (HDPE) at 190°C and 2.16 kg is 5-25 g / 10 min, specifically 7-20 g / 10 min.

[0023] Preferably, the linear low-density polyethylene (LLDPE) has a melt flow rate (melt mass flow rate, MFR) of ≥15g / 10min at 190℃ and 2.16kg, specifically ≥20g / 10min.

[0024] Preferably, the melt flow rate (melt mass flow rate, MFR) of the linear low-density polyethylene (LLDPE) at 190°C and 2.16 kg is one or any two of the following values: 15 g / 10 min, 16 g / 10 min, 17 g / 10 min, 18 g / 10 min, 19 g / 10 min, 20 g / 10 min, 30 g / 10 min, 40 g / 10 min, 50 g / 10 min, 60 g / 10 min, 70 g / 10 min, 80 g / 10 min, 90 g / 10 min, 100 g / 10 min, 105 g / 10 min, 110 g / 10 min, and 120 g / 10 min.

[0025] More preferably, the melt flow rate (melt mass flow rate, MFR) of the linear low-density polyethylene (LLDPE) at 190°C and 2.16 kg is 20-100 g / 10 min.

[0026] In this invention, the melt flow rate (melt mass flow rate, MFR) of the high-density polyethylene (HDPE) and / or linear low-density polyethylene (LLDPE) is tested according to ISO 1133-1-2022 standard.

[0027] Preferably, the polypropylene material further includes at least one of an antioxidant and a light stabilizer.

[0028] More preferably, the antioxidant is present in 0-1.5 parts by weight, specifically 0.2-1 parts.

[0029] More preferably, the antioxidant is in the range of one or any two of the following weight parts: 0 parts, 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, and 1.5 parts.

[0030] More preferably, the antioxidant includes at least one of hindered phenolic antioxidants and phosphite antioxidants.

[0031] More preferably, the hindered phenolic antioxidant includes at least one of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] (antioxidant 1010), octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (antioxidant 1076), and N,N'-(hexane-1,6-diyl)bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide] (antioxidant 1098).

[0032] More preferably, the phosphite antioxidant includes at least one of tris(2,4-di-tert-butyl)phosphite (antioxidant 168), bis(2,4-di-tert-butylphenol) pentaerythritol diphosphite (antioxidant 626), and triphenyl phosphite (antioxidant TPP).

[0033] More preferably, the light stabilizer is 0-1.5 parts by weight, specifically 0.1-1 parts.

[0034] More preferably, the weight parts of the light stabilizer are one or any two of the following: 0 parts, 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, and 1.5 parts.

[0035] More preferably, the light stabilizer includes hindered amine light stabilizers.

[0036] More preferably, the hindered amine light stabilizer includes at least one of light stabilizer 770 [bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, CAS No.: 52829-07-9], light stabilizer 622 (CAS No.: 65447-77-0), and light stabilizer 944 (CAS No.: 71878-19-8).

[0037] Preferably, in the polypropylene material, the block copolymer polypropylene (PP-B) comprises one or any two of the following weight parts: 45 parts, 47 parts, 48 ​​parts, 50 parts, 52 parts, 53 parts, 55 parts, 57 parts, 58 parts, 60 parts, 62 parts, 63 parts, 65 parts, 67 parts, 68 parts, 70 parts, 72 parts, 73 parts, 75 parts, 77 parts, 78 parts, 80 parts, 82 parts, 83 parts, and 85 parts; and the polyethylene composite comprises one or any two of the following weight parts: 20 parts, 22 parts, 23 parts, 25 parts, 27 parts, 28 parts, 30 parts, 32 parts, 33 parts, 35 parts, 37 parts, 38 parts, 40 parts, 42 parts, 43 parts, 45 parts, 47 parts, 48 ​​parts, and 50 parts.

[0038] Preferably, the polypropylene material comprises the following components in parts by weight: 50-80 parts block copolymer polypropylene (PP-B), 25-45 parts polyethylene compound.

[0039] Preferably, based on the weight of the polypropylene material, the block copolymer polypropylene (PP-B) has a weight percentage of ≥40%, specifically 48%-78%.

[0040] Secondly, the present invention provides a method for preparing a polypropylene material, comprising the following steps: Mix the components, melt and extrude to obtain polypropylene material.

[0041] Preferably, a twin-screw extruder is used for the melt extrusion.

[0042] More preferably, the length-to-diameter ratio of the twin-screw extruder is (38-48):1.

[0043] More preferably, the temperature of the twin-screw extruder is 80-120℃ in zone 1, 180-200℃ in zone 2, 180-220℃ in zone 3, 180-220℃ in zone 4, 180-220℃ in zone 5, 180-220℃ in zone 6, 180-220℃ in zone 7, 180-220℃ in zone 8, and 180-220℃ in zone 9.

[0044] Thirdly, the present invention provides an article comprising the aforementioned polypropylene material.

[0045] In this invention, the articles include, but are not limited to, at least one of automotive parts, appliance housings, and tricycle body panels.

[0046] Compared with the prior art, the beneficial effects of the present invention are as follows: The polypropylene material of the present invention possesses both high gloss and high impact strength properties, specifically: It has a specific EPR content and EPR weight-average molecular weight (M). W Block copolymer polypropylene (PP-B) exhibits EPR molecular chains that can entangle with high-density polyethylene (HDPE) with very few short branches and linear low-density polyethylene (LLDPE) with a large number of short branches. This promotes the dispersion of the EPR phase in the system, making the EPR phase more extended and uniformly dispersed. This reduces the differences between phase interfaces, making light diffract more easily and reducing diffuse reflection at the phase interfaces, thereby improving the gloss of the polypropylene material. At the same time, because the EPR phase is more extended and uniformly dispersed in the system, the toughening zone in the system is increased, thus improving the impact strength of the polypropylene material (including impact strength at room temperature and low temperature). Detailed Implementation

[0047] To better illustrate the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0048] The experimental methods used in the following examples and comparative examples, unless otherwise specified, are generally performed under conventional conditions in the art or as recommended by the manufacturer. Unless otherwise specified, all raw materials and reagents used are commercially available from the general market. Furthermore, unless otherwise specified, "parts" and "%" refer to mass measurements.

[0049] The reagents used in the various embodiments and comparative examples of this invention are as follows: Block copolymer polypropylene 1 (PP-B1) had a measured EPR content of 20.7%, and the weight-average molecular weight of EPR (M) was... W The figure is 194,000, PP K9017; Block copolymer polypropylene 2 (PP-B2) had a measured EPR content of 27.3%, and the weight-average molecular weight of EPR (M) was... W The figure is 255,000, K9829H, Yanshan Petrochemical; The block copolymer polypropylene 3 (PP-B3) had a measured EPR content of 24.3%, and the weight-average molecular weight of the EPR (M) was... W The figure is 349,000, PP 8285E1, ExxonMobil; Block copolymer polypropylene 4 (PP-B4) had a measured EPR content of 25.0%, and the weight-average molecular weight of EPR (M) was... W The figure was 533,000, PP SP179, Lanzhou Petrochemical; The block copolymer polypropylene 5 (PP-B5) had a measured EPR content of 17.2%, and the weight-average molecular weight of EPR (M) was [not specified]. W The figure is 348,000, EP300M, CNOOC Shell; High-density polyethylene 1 (HDPE-1) has a melt flow rate (melt mass flow rate, MFR) of 20 g / 10 min at 190℃ and 2.16 kg. HDPE 2911, Fushun Petrochemical. High-density polyethylene 2 (HDPE-2) has a melt flow rate (melt mass flow rate, MFR) of 10 g / 10 min at 190℃ and 2.16 kg. HDPE DGDA 6098, Sinopec Qilu Petrochemical. High-density polyethylene 3 (HDPE-3) has a melt flow rate (melt mass flow rate, MFR) of 7 g / 10 min at 190℃ and 2.16 kg. HDPE DMDA 8008, Sinopec Fujian Refinery. Linear low-density polyethylene 1 (LLDPE-1) has a melt flow rate (melt mass flow rate, MFR) of 50 g / 10 min at 190℃ and 2.16 kg. LLDPE DMDA-8350, Tianjin United Petrochemical. Linear low-density polyethylene 2 (LLDPE-2), with a melt flow rate (melt mass flow rate, MFR) of 100 g / 10 min at 190℃ and 2.16 kg, LLDPE DMDA-1077, Tianjin United Petrochemical; Linear low-density polyethylene 3 (LLDPE-3), with a melt flow rate (melt mass flow rate, MFR) of 20 / 10min at 190℃ and 2.16kg, LLDPE M2320, Sinopec; Low-density polyethylene (LDPE) has a melt flow rate (melt mass flow rate, MFR) of 7 g / 10 min at 190℃ and 2.16 kg. LDPE LD605, Yanshan Petrochemical. Antioxidant 1010, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], commercially available; Antioxidant 168, tris(2,4-di-tert-butyl)phosphite, commercially available; Light stabilizer 770, bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, CAS No.: 52829-07-9, commercially available; In this invention, the EPR content test method in the block copolymer polypropylene (PP-B) is as follows: add M1 (unit g) of block copolymer polypropylene (PP-B) to xylene, heat and reflux at 135°C for 90 min, cool and crystallize, filter, take the filtrate, evaporate and dry, weigh the mass of the dried substance, and record it as M2 (unit g). Then, the EPR (ethylene propylene diene monomer rubber) content (%) in the block copolymer polypropylene (PP-B) is = M2 / M1×100%.

[0050] In this invention, the weight-average molecular weight (M) of the EPR in the block copolymer polypropylene (PP-B) is... W The test method is as follows: Block copolymer polypropylene (PP-B) is added to xylene, heated under reflux at 135℃ for 90 min, cooled to crystallize, filtered, and the filtrate is evaporated and dried. The weight-average molecular weight (Mn) of the dried substance is measured by gel permeation chromatography (GPC, volume exclusion chromatography) according to GB / T 36214.4-2018 standard. W ).

[0051] In this invention, the melt flow rate (melt mass flow rate, MFR) of the high-density polyethylene (HDPE) and / or linear low-density polyethylene (LLDPE) and / or low-density polyethylene (LDPE) is tested according to ISO 1133-1-2022 standard.

[0052] Examples 1-13 and Comparative Examples 1-5 Examples 1-13 and Comparative Examples 1-5 provide different polypropylene materials, which differ only in the types and amounts of each component. By weight, Examples 1-13 and Comparative Examples 1-5 include the components shown in Table 1-3. The preparation methods of the polypropylene materials in Examples 1-13 and Comparative Examples 1-5 include the following steps: The components are mixed at high speed in a high-speed mixer for 3 minutes to obtain a premix. Then, the premix is ​​melt-extruded and granulated using a twin-screw extruder (length-to-diameter ratio 40:1) to obtain the polypropylene material. The twin-screw extruder has the following temperatures: Zone 1: 90℃; Zone 2: 180℃; Zone 3: 200℃; Zone 4: 200℃; Zone 5: 200℃; Zone 6: 200℃; Zone 7: 200℃; Zone 8: 200℃; Zone 9: 200℃; and the main extruder speed is 450 r / min. Table 1. Weight parts of each component in the polypropylene materials of Examples 1-7 Table 2. Weight parts of each component in polypropylene materials of Examples 8-13 Table 3 shows the weight parts of each component in the polypropylene materials of Comparative Examples 1-5. Performance testing The performance of the polypropylene materials in each embodiment and comparative example was tested, as follows: 1. Gloss test: (1) Under the conditions of injection temperature of 220℃ and mold temperature of 50℃, polypropylene material is injection molded into a template with a length of 70cm, a width of 50cm and a thickness of 3cm. (2) Measure the gloss of the sample surface with a gloss meter at a measurement angle of 60°; 2. Impact strength test: (1) Room temperature impact strength test Under the conditions of injection temperature of 220℃ and mold temperature of 50℃, polypropylene material was injection molded into a sample with dimensions of 80mm in length, 10mm in width and 4mm in thickness. At 23℃, according to ISO180-2023 standard, using type A notch, the cantilever beam notched impact strength of polypropylene material is measured under normal temperature conditions of 23℃, which is the room temperature impact strength of polypropylene material; (2) Low-temperature impact strength test Under the conditions of injection temperature of 220℃ and mold temperature of 50℃, polypropylene material was injection molded into a sample with dimensions of 80mm in length, 10mm in width and 4mm in thickness. At -30℃, according to ISO180-2023 standard, using a type A notch, the cantilever beam notched impact strength of polypropylene material is measured under low temperature conditions of -30℃, which is the low temperature impact strength of polypropylene material; The experimental results are shown in the table below: Table 4. Performance test results of polypropylene materials in each example and comparative example. As shown in Table 4, the polypropylene material of the present invention possesses both high gloss and high impact strength. Specifically, the PC / ABS composition in the above embodiments achieves a gloss level ≥70 GU and a room-temperature impact strength ≥30 kJ / m². 2 Low-temperature impact strength ≥4.0 kJ / m 2 .

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A polypropylene material, characterized in that, The components include the following parts by weight: 45-85 parts block copolymer polypropylene, 20-50 parts polyethylene composite; In the block copolymer polypropylene, the EPR content is ≥19%, and the weight-average molecular weight of EPR is ≤370,000. The polyethylene compound includes high-density polyethylene and linear low-density polyethylene.

2. The polypropylene material as described in claim 1, characterized in that, The weight ratio of the high-density polyethylene to the linear low-density polyethylene is (0.1-3):

1.

3. The polypropylene material as described in claim 1, characterized in that, The weight ratio of the high-density polyethylene to the linear low-density polyethylene is (1-2):

1.

4. The polypropylene material as described in claim 1, characterized in that, The high-density polyethylene has a melt flow rate ≥5g / 10min at 190℃ and 2.16kg.

5. The polypropylene material as described in claim 1, characterized in that, The high-density polyethylene has a melt flow rate of 7-20 g / 10 min at 190°C and 2.16 kg.

6. The polypropylene material as described in claim 1, characterized in that, The linear low-density polyethylene has a melt flow rate ≥15g / 10min at 190℃ and 2.16kg.

7. The polypropylene material as described in claim 1, characterized in that, The linear low-density polyethylene has a melt flow rate of 20-100 g / 10 min at 190°C and 2.16 kg.

8. The polypropylene material as described in claim 7, characterized in that, The polypropylene material also includes at least one of antioxidants and light stabilizers.

9. A method for preparing the polypropylene material according to any one of claims 1-8, characterized in that, Includes the following steps: Mix the components, melt and extrude to obtain polypropylene material.

10. An article characterized in that, Contains the polypropylene material according to any one of claims 1-8.

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