Low-odor antibacterial polypropylene composite material and preparation method thereof

Abstract

The invention discloses a low-odor antibacterial polypropylene composite material and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 50-95 parts of polypropylene, 0.5-2 parts of an odor antibacterial agent, 0.2-0.5 part of an antioxidant, 0.2-0.5 part of a light stabilizer, 0.1-2 parts of a lubricant and 0.5-2 parts of a coloring agent, 0-20 parts of a flexibilizer and 0-30 parts of an inorganic filler, and the sum of the parts by weight of the polypropylene, the flexibilizer and the inorganic filler is 100 parts. The metal oxide subjected to irradiation treatment is adopted as an odor antibacterial agent, ultra-far infrared electromagnetic waves can be released, oxygen molecules in the air are changed into an excited state, C-H and N-H bonds in main pollutants such as formaldehyde in the air are effectively broken and split, and continuous decomposition and conversion of harmful substances are achieved. In addition, the odor antibacterial agent also shows excellent antibacterial performance, endows the polypropylene composite material with lasting low odor and antibacterial protection, and fundamentally solves the problem that the odor level of the traditional polypropylene composite material rises over time.

Description

Technical Field

[0001] The invention relates to the field of polymer composite materials, in particular to a low-odor, antibacterial polypropylene composite material and a preparation method thereof. Background Art

[0002] Polypropylene has been increasingly widely used due to its excellent mechanical properties, heat resistance, and easy processing and molding. Its modified products are widely used in automotive interior and exterior decoration, especially in interior parts such as dashboards and door panels. In order to achieve the performance required by the products, it is often necessary to add some mineral fillers, stabilizers and other processing aids to polypropylene. These materials may bring some obvious abnormal odors. Polypropylene has serious degradation during the synthesis process, and the incomplete elimination of small molecules that are not completely polymerized will also produce irritating odors and emit volatile organic compounds (VOCs). In addition, as people's living standards continue to improve, their requirements for health are also getting higher and higher. Plastic products will be easily eroded by mold after a long time of use, and the surface of plastic products is easy to absorb oil, which will provide rich nutrients for pathogenic microorganisms such as Staphylococcus aureus, Escherichia coli, Aspergillus niger, and green plum, which are difficult to completely remove. These products will also cause bacterial infection and cross-contamination during the transmission process between people and between people and objects, causing diseases. Therefore, the development of a polypropylene material with persistent antibacterial and low-odor properties has become a hot topic in current research. Summary of the invention

[0003] In view of this, the present invention provides a low-odor, antibacterial polypropylene composite material and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology, so that the polypropylene material has both low-odor and antibacterial properties. The use of irradiated metal oxides as odor antibacterial agents can release ultra-far infrared electromagnetic waves, which can make the oxygen molecules in the air become excited states, effectively breaking and splitting the CH and NH bonds in the main pollutants such as formaldehyde, toluene, ammonia and VOC in the air, and realizing the continuous decomposition and transformation of these harmful substances. In addition, the odor antibacterial agent also exhibits excellent antibacterial properties, giving the polypropylene composite material lasting low odor and antibacterial protection, fundamentally solving the problem of the increase in odor level of traditional polypropylene composite materials over time, and providing users with a safer and healthier material choice.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] In a first aspect, the present invention discloses a low-odor, antibacterial polypropylene composite material, which is prepared from the following components in parts by weight:

[0006]

[0007] The total weight of the polypropylene, toughening agent and inorganic filler is 100 parts.

[0008] As a further solution of the present invention: the melt flow rate of the polypropylene at 230°C / 2.16kg is 10-100g / 10min.

[0009] As a further solution of the present invention: the toughening agent is a polyolefin thermoplastic elastomer, and its melt flow rate at 190°C / 2.16kg is 0.1-40g / 10min.

[0010] As a further solution of the present invention: the inorganic filler is at least one of talc, calcium carbonate and barium sulfate.

[0011] As a further solution of the present invention: the odor antibacterial agent is generated by irradiating metal oxide with β rays.

[0012] As a further solution of the present invention: the irradiation time is 15-25 minutes, and the irradiation dose is 30-40 kGy.

[0013] As a further embodiment of the present invention: the metal oxide is at least one oxide of manganese, platinum, cerium, silver, zinc, titanium and iron.

[0014] As a further embodiment of the present invention: the antioxidant is selected from at least one of hindered phenols, phosphites, hindered amines and thioesters; and / or,

[0015] The lubricant is selected from at least one of fatty acids, amides, esters, alcohols, and silicone lubricants; and / or,

[0016] The light stabilizer is at least one of salicylate, benzophenone, benzotriazole, triazine, substituted acrylonitrile, oxamide, organic nickel compound and hindered amine light stabilizers; and / or,

[0017] The colorant is toner.

[0018] In a second aspect, the present invention discloses a method for preparing the low-odor, antibacterial polypropylene composite material as described above, comprising the following steps:

[0019] Polypropylene, toughening agent, inorganic filler, odor antibacterial agent, antioxidant, light stabilizer, lubricant and colorant are mixed, and then melt-extruded and granulated by side feeding to prepare a low-odor antibacterial polypropylene composite material.

[0020] In a third aspect, the present invention discloses the use of the low-odor, antibacterial polypropylene composite material as described above, wherein the low-odor, antibacterial polypropylene composite material is used for automotive interior products.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. After irradiation, the odor antibacterial agent of the present invention can release ultra-far infrared electromagnetic waves, which are between microwaves and infrared radiation. Compared with infrared light, infrared electromagnetic waves have strong transmittance and good penetration ability, which can make oxygen molecules in the air excited, effectively break and split the CH and NH bonds in the main pollutants such as formaldehyde, toluene, ammonia and VOC in the air, thereby continuously decomposing and transforming these harmful substances, and has a strong removal ability for formaldehyde, benzene, ammonia, etc., and has good antibacterial function, so that the polypropylene composite material has a long-term low odor and antibacterial effect, which effectively solves the problem that the odor level of the existing polypropylene composite material increases with time.

[0023] 2. The present invention does not require the material to be baked, and can ensure that the odor and VOC of the polypropylene composite material meet the requirements, thereby further improving efficiency and saving energy.

[0024] 3. When the low-odor, antibacterial polypropylene composite material prepared by the present invention is used to mold automotive interior decoration parts, the odor level and VOC content of the parts will not increase, which has very important practical significance for the health of users. DETAILED DESCRIPTION

[0025] For ease of understanding of the present invention, the present invention will be described more fully below in conjunction with specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] The specific information of the raw materials used in the following examples and comparative examples is as follows:

[0028] Polypropylene K7227 was purchased from Guangzhou Petrochemical;

[0029] Polypropylene 648U was purchased from Sinopec;

[0030] POE 875L was purchased from SK Chemicals;

[0031] Talc T0214 was purchased from Beihai Group;

[0032] Antioxidants were purchased from Xinxiu Chemical, including antioxidant 1010 (hindered phenols) and antioxidant 168 (phosphites);

[0033] The light stabilizer was purchased from Wuhan Yuancheng Gongchuang Technology, brand number 2002;

[0034] The lubricant was purchased from Silike, brand name is silicone 306;

[0035] The colorant was purchased from Clariant Chemicals, and black powder was selected;

[0036] The odor antimicrobial agent was prepared according to the following method, wherein manganese dioxide (MnO2), ferric oxide (Fe2O3), zinc oxide (ZnO), and titanium dioxide (TiO2) were purchased from Beekman Biotechnology;

[0037] MnO2, Fe2O3, ZnO, and TiO2 were placed in an electron accelerator, respectively, and irradiated with β rays in an inert atmosphere. The irradiation time was 15-25 minutes and the irradiation dose was 30-40 kGy to obtain a variety of odor antibacterial agents (MnO2, Fe2O3, ZnO, TiO2). The specific irradiation time and energy are shown in Table 1:

[0038] Table 1 Preparation of odor antibacterial agent irradiation time and energy

[0039] Odor Antibacterial Agent Irradiation time Irradiation Energy <![CDATA[MnO2 a]]> 15 30 <![CDATA[MnO2 b]]> 15 35 <![CDATA[Fe2O3 a]]> 20 30 <![CDATA[Fe2O3 b]]> 25 30 ZnO 20 35 ZnO 25 40 <![CDATA[TiO2 a]]> 20 35 <![CDATA[TiO2 b]]> 15 40 <![CDATA[TiO2 c]]> 20 20 <![CDATA[TiO2 d]]> 15 45 <![CDATA[TiO2 e]]> 10 30 <![CDATA[TiO2 f]]> 30 40

[0040] All the above materials are commercially available conventional products.

[0041] It is to be understood that the above raw materials and reagents are only examples of some specific embodiments of the present invention, so that the technical solution of the present invention is clearer, and it does not mean that the present invention can only use the above reagents, and the specific scope in the claims shall prevail. In addition, the "parts" described in the examples and comparative examples, unless otherwise specified, refer to parts by weight.

[0042] Any range described in the present invention includes the end value and any numerical value between the end values ​​and any sub-range formed by the end value or any numerical value between the end values.

[0043] Example 1

[0044] Weigh 25 parts of PP 648U, 70 parts of PP K7227, 5 parts of POE 875L, 0.5 parts of odor antibacterial agent MnO2 a, 0.1 parts of antibacterial agent 168, 0.1 parts of antibacterial agent 1010, 0.2 parts of light stabilizer 2002, 0.1 parts of silicone 306, and 0.5 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0045] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0046] The operating parameters of the twin-screw extruder are as follows: the temperature of zone 1 is 60°C, the temperature of zones 2 to 8 is 190°C, the extrusion port temperature is 200°C, and the screw speed is 400rpm.

[0047] Example 2

[0048] Weigh 35 parts of PP 648U, 50 parts of PP K7227, 5 parts of POE 875L, 10 parts of talc T0214, 0.5 parts of odor antibacterial agent MnO2 b, 0.3 parts of antioxidant 168, 0.3 parts of antioxidant 1010, 0.4 parts of light stabilizer 2002, 2 parts of silicone 306, and 2 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0049] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0050] The operating parameters of the twin-screw extruder are as follows: the temperature of zone 1 is 60°C, the temperature of zones 2 to 8 is 190°C, the extrusion port temperature is 200°C, and the screw speed is 500rpm.

[0051] Example 3

[0052] Weigh 35 parts of PP 648U, 50 parts of PP K7227, 5 parts of POE 875L, 10 parts of talc T0214, 0.5 parts of odor antibacterial agent Fe2O3 a, 0.2 parts of antioxidant 168, 0.2 parts of antioxidant 1010, 0.3 parts of light stabilizer 2002, 0.5 parts of silicone 306, and 1 part of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0053] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0054] The operating parameters of the twin-screw extruder are as follows: the temperature of zone 1 is 60°C, the temperature of zones 2 to 8 is 190°C, the extrusion port temperature is 210°C, and the screw speed is 500rpm.

[0055] Example 4

[0056] Weigh 32 parts of PP 648U, 60 parts of PP K7227, 8 parts of POE 875L, 1 part of odor antibacterial agent Fe2O3 b, 0.3 parts of antioxidant 168, 0.3 parts of antioxidant 1010, 0.3 parts of light stabilizer 2002, 0.9 parts of silicone 306, and 1 part of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0057] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0058] The operating parameters of the twin-screw extruder are as follows: the temperature of zone 1 is 60°C, the temperature of zones 2 to 8 is 190°C, the extrusion port temperature is 220°C, and the screw speed is 500rpm.

[0059] Example 5

[0060] Weigh 35 parts of PP 648U, 40 parts of PP K7227, 10 parts of POE 875L, 15 parts of talc T0214, 1 part of odor antibacterial agent ZnO a, 0.3 parts of antioxidant 168, 0.3 parts of antioxidant 1010, 0.2 parts of light stabilizer 2002, 1.5 parts of silicone 306, and 1.5 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0061] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0062] The operating parameters of the twin-screw extruder are as follows: the temperature of zone 1 is 60°C, the temperature of zones 2 to 8 is 200°C, the extrusion port temperature is 210°C, and the screw speed is 400rpm.

[0063] Example 6

[0064] Weigh 30 parts of PP 648U, 55 parts of PP K7227, 15 parts of talc T0214, 1 part of odor antibacterial agent ZnO b, 0.3 parts of antioxidant 168, 0.3 parts of antioxidant 1010, 0.4 parts of light stabilizer 2002, 0.5 parts of silicone 306, and 1 part of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0065] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0066] The operating parameters of the twin-screw extruder are as follows: the temperature of zone 1 is 60°C, the temperature of zones 2 to 8 is 190°C, the extrusion port temperature is 200°C, and the screw speed is 500rpm.

[0067] Example 7

[0068] Weigh 25 parts of PP 648U, 40 parts of PP K7227, 15 parts of POE 875L, 20 parts of talc T0214, 1.5 parts of odor antibacterial agent TiO2 a, 0.1 parts of antioxidant 168, 0.1 parts of antioxidant 1010, 0.2 parts of light stabilizer 2002, 0.1 parts of silicone 306, and 0.5 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0069] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0070] The operating parameters of the twin-screw extruder are as follows: the temperature of zone 1 is 60°C, the temperature of zones 2 to 8 is 190°C, the extrusion port temperature is 200°C, and the screw speed is 500rpm.

[0071] Example 8

[0072] Weigh 20 parts of PP 648U, 30 parts of PP K7227, 20 parts of POE 875L, 30 parts of talc T0214, 2 parts of odor antibacterial agent TiO2 b, 0.3 parts of antioxidant 168, 0.3 parts of antioxidant 1010, 0.4 parts of light stabilizer 2002, 2 parts of silicone 306, and 2 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0073] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0074] The operating parameters of the twin-screw extruder are as follows: the temperature of zone 1 is 60°C, the temperature of zones 2 to 8 is 200°C, the extrusion port temperature is 220°C, and the screw speed is 400rpm.

[0075] Comparative Example 1

[0076] Weigh 25 parts of PP 648U, 70 parts of PP K7227, 5 parts of POE 875L, 0.1 parts of antioxidant 168, 0.1 parts of antioxidant 1010, 0.2 parts of light stabilizer 2002, 0.1 parts of silicone 306, and 0.5 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0077] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0078] Wherein, the operating parameters of the twin-screw extruder are the same as those in Example 1.

[0079] Comparative Example 2

[0080] Weigh 35 parts of PP 648U, 50 parts of PP K7227, 5 parts of POE 875L, 10 parts of talc T0214, 0.5 parts of MnO, 0.3 parts of antioxidant 168, 0.3 parts of antioxidant 1010, 0.4 parts of light stabilizer 2002, 2 parts of silicone 306, and 2 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0081] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0082] Wherein, the operating parameters of the twin-screw extruder are the same as those in Example 2.

[0083] Comparative Example 3

[0084] Weigh 35 parts of PP 648U, 50 parts of PP K7227, 5 parts of POE 875L, 10 parts of talc T0214, 0.2 parts of antioxidant 168, 0.2 parts of antioxidant 1010, 0.3 parts of light stabilizer 2002, 0.5 parts of silicone 306, and 1 part of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0085] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0086] Wherein, the operating parameters of the twin-screw extruder are the same as those in Example 3.

[0087] Comparative Example 4

[0088] Weigh 35 parts of PP 648U, 40 parts of PP K7227, 10 parts of POE 875L, 15 parts of talc T0214, 1 part of ZnO, 0.3 parts of antioxidant 168, 0.3 parts of antioxidant 1010, 0.2 parts of light stabilizer 2002, 1.5 parts of silicone 306, and 1.5 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0089] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0090] Wherein, the operating parameters of the twin-screw extruder are the same as those in Example 5.

[0091] Comparative Example 5

[0092] Weigh 30 parts of PP 648U, 55 parts of PP K7227, 15 parts of talc T0214, 0.3 parts of antioxidant 168, 0.3 parts of antioxidant 1010, 0.4 parts of light stabilizer 2002, 0.5 parts of silicone 306, and 1 part of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0093] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0094] Wherein, the operating parameters of the twin-screw extruder are the same as those in Example 6.

[0095] Comparative Example 6

[0096] Weigh 30 parts of PP 648U, 55 parts of PP K7227, 15 parts of talc T0214, TiO2, antioxidant 168, antioxidant 1010, weathering agent 2002, silicone 306 and black powder into a high-speed mixer and mix well to obtain a mixture;

[0097] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0098] Wherein, the operating parameters of the twin-screw extruder are the same as those in Example 6.

[0099] Comparative Example 7

[0100] Weigh 25 parts of PP 648U, 40 parts of PP K7227, 15 parts of POE 875L, 20 parts of talc T0214, 1.5 parts of odor antibacterial agent TiO2 c, 0.1 parts of antioxidant 168, 0.1 parts of antioxidant 1010, 0.2 parts of light stabilizer 2002, 0.1 parts of silicone 306, and 0.5 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0101] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0102] Among them, the operating parameters of the twin-screw extruder are the same as those in Example 7.

[0103] Comparative Example 8

[0104] Weigh 20 parts of PP 648U, 30 parts of PP K7227, 20 parts of POE 875L, 30 parts of talc T0214, 2 parts of odor antibacterial agent TiO2 d, 0.3 parts of antioxidant 168, 0.3 parts of antioxidant 1010, 0.4 parts of light stabilizer 2002, 2 parts of silicone 306, and 2 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0105] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0106] Among them, the operating parameters of the twin-screw extruder are the same as those in Example 8.

[0107] Comparative Example 9

[0108] Weigh 25 parts of PP 648U, 40 parts of PP K7227, 15 parts of POE 875L, 20 parts of talc T0214, 1.5 parts of odor antibacterial agent TiO2 e, 0.1 parts of antioxidant 168, 0.1 parts of antioxidant 1010, 0.2 parts of light stabilizer 2002, 0.1 parts of silicone 306, and 0.5 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0109] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0110] Among them, the operating parameters of the twin-screw extruder are the same as those in Example 7.

[0111] Comparative Example 10

[0112] Weigh 20 parts of PP 648U, 30 parts of PP K7227, 20 parts of POE 875L, 30 parts of talc T0214, 2 parts of odor antibacterial agent TiO2 f, 0.3 parts of antioxidant 168, 0.3 parts of antioxidant 1010, 0.4 parts of light stabilizer 2002, 2 parts of silicone 306, and 2 parts of black powder, add them into a high-speed mixer and mix them evenly to obtain a mixture;

[0113] The mixed material is added into a twin-screw extruder, and after melting, extruding and granulating, a low-odor, antibacterial polypropylene composite material is obtained.

[0114] Among them, the operating parameters of the twin-screw extruder are the same as those in Example 8.

[0115] Performance testing and results

[0116] The low-odor, antibacterial polypropylene composite materials prepared in the above examples and comparative examples were subjected to the following performance tests:

[0117] (1) Odor test: Tested according to BYD-TY-D11F14-10013 standard,

[0118] (2) VOC test: Tested according to BYD-TY-D11F14-10160 standard;

[0119] (3) Antibacterial test; tested according to GB / T 31402-2015 standard

[0120] (4) Anti-mildew test: Tested according to GB / T 2423.16-2022 standard.

[0121] The test results are shown in Table 2.

[0122] Table 2 Test data results of embodiments and comparative examples

[0123]

[0124]

[0125] From Examples 1-8, it can be seen that within the set irradiation time and energy range, the longer the irradiation time and the higher the energy of the metal oxide, the better the effect on the odor, VOC and antibacterial of the composite material;

[0126] From the comparison between Example 1 and Comparative Example 1, and between Example 2 and Comparative Example 2, it can be seen that: whether in a non-filled system or a filled system, the use of irradiated metal oxides can greatly improve the odor, VOC and antibacterial effects of the composite material. From the comparison between Example 3 and Comparative Example 3, and between Example 5 and Comparative Example 4, it can be seen that in talc filling systems with different proportions, the use of irradiated metal oxides can greatly improve the odor, VOC and antibacterial effects of the composite material. From the comparison between Example 6 and Comparative Example 5, and Comparative Example 6, it can be seen that in a non-POE system, the irradiated metal oxides have an improvement effect on the odor, VOC and antibacterial properties of the composite material.

[0127] From the comparison between Example 7 and Comparative Example 7, Example 8 and Comparative Example 8, Example 7 and Comparative Example 9, and Example 8 and Comparative Example 10, it can be seen that: the use of metal oxides with insufficient irradiation time and energy improves the odor, VOC and antibacterial effect of the composite material, but the effect is not good within the set irradiation time and energy range; the use of metal oxides with irradiation time and energy exceeding the range destroys the structure of part of the matrix, and the antibacterial effect of the composite material is very good, but the odor and VOC effects are not good within the set irradiation time and energy range.

[0128] Therefore, the irradiated metal oxides in the commonly used formulation system for automotive interior parts have an improvement effect on the odor, VOC and antibacterial properties of composite materials.

[0129] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0130] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A low-odor, antibacterial polypropylene composite material, characterized in that: It is prepared from the following components in parts by weight: The total weight of the polypropylene, toughening agent and inorganic filler is 100 parts.

2. The low-odor, antibacterial polypropylene composite material according to claim 1, characterized in that: The polypropylene has a melt flow rate of 10-100 g / 10 min at 230° C. / 2.16 kg.

3. The low-odor, antibacterial polypropylene composite material according to claim 1, characterized in that: The toughening agent is a polyolefin thermoplastic elastomer, and the melt flow rate of the polyolefin thermoplastic elastomer under the conditions of 190° C. / 2.16 kg is 0.1-40 g / 10 min.

4. The low-odor, antibacterial polypropylene composite material according to claim 1, characterized in that: The inorganic filler is at least one of talc, calcium carbonate and barium sulfate.

5. The low-odor, antibacterial polypropylene composite material according to claim 1, characterized in that: The odor antibacterial agent is generated by irradiating metal oxide with beta rays.

6. The low-odor, antibacterial polypropylene composite material according to claim 5, characterized in that: The irradiation time is 15-25 minutes, and the irradiation dose is 30-40 kGy.

7. The low-odor, antibacterial polypropylene composite material according to claim 5, characterized in that: The metal oxide is at least one oxide of manganese, platinum, cerium, silver, zinc, titanium and iron.

8. The low-odor, antibacterial polypropylene composite material according to claim 1, characterized in that: The antioxidant is selected from at least one of hindered phenols, phosphites, hindered amines and thioesters; and / or, The lubricant is selected from at least one of fatty acids, amides, esters, alcohols, and silicone lubricants; and / or, The light stabilizer is at least one of salicylate, benzophenone, benzotriazole, triazine, substituted acrylonitrile, oxamide, organic nickel compound and hindered amine light stabilizers; and / or, The colorant is toner.

9. A method for preparing the low-odor, antibacterial polypropylene composite material according to any one of claims 1 to 8, characterized in that: The following steps are involved: Polypropylene, toughening agent, inorganic filler, odor antibacterial agent, antioxidant, light stabilizer, lubricant and colorant are mixed, and then melt-extruded and granulated by side feeding to prepare a low-odor antibacterial polypropylene composite material.

10. An application of the low-odor, antibacterial polypropylene composite material according to any one of claims 1 to 8, characterized in that: The low-odor, antibacterial polypropylene composite material is used for automotive interior products.

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