CN109851907B - High-noise-resistance scratch-resistant polypropylene composite material and preparation method and application thereof - Google Patents
High-noise-resistance scratch-resistant polypropylene composite material and preparation method and application thereof Download PDFInfo
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Abstract
The invention provides a high-noise-resistance scratch-resistant polypropylene composite material as well as a preparation method and application thereof, wherein the composite material comprises the following components in parts by weight: 45.6-76.2 parts of polypropylene, 5-10 parts of toughening agent, 15-35 parts of nano silicon dioxide, 0.2-0.6 part of nano sodium bicarbonate, 0.8-2 parts of scratch-resistant agent, 2-6 parts of compatilizer, 0.2-0.6 part of antioxidant and 0.2-0.6 part of lubricant. The invention controls the proportion of nanometer pores formed by silicon dioxide in the material and micron pores formed by sodium bicarbonate by foaming agents of nanometer silicon dioxide and nanometer sodium bicarbonate, thereby enhancing the absorption effect of the material on sound waves.
Description
Technical Field
The invention relates to the technical field of new materials, and particularly relates to a high-noise-resistance scratch-resistant polypropylene composite material as well as a preparation method and application thereof.
Background
With the improvement of living standard of people, automobiles become an important tool for people to ride instead of walk. Meanwhile, the requirements of people on automobiles are higher and higher, requirements from lightweight automobiles to interior isolation, noise reduction effect, interior odor and the like are proposed for one time, and the auditing standard is stricter and stricter. In all cases, automobile parts manufacturers are increasingly demanding materials for automobiles.
Due to the popularization of light weight of automobiles, the usage amount of plastics on automobiles is larger, and particularly, the plastification of interior parts of automobiles is basically realized. Polypropylene (PP) is a general thermoplastic with excellent comprehensive performance, is one of the lightest varieties of all plastics at present, has the characteristics of low price, corrosion resistance, easiness in recycling, no water absorption, no toxicity and the like, and is widely applied to interior and exterior trimming parts of automobiles, such as instrument panels, door panels, stand columns, bumpers, bottom plates and the like.
However, at present, the ordinary PP material is difficult to meet the requirement of the car manufacturer for the sound insulation effect in the car, and a certain modification treatment is often required to be performed on the ordinary PP material, so that the PP material has the effect of reducing the noise in the car, and meanwhile, certain requirements are also provided for the performances of the material, such as the smell and the like. Chinese patent No. CN102993687A discloses a halogen-free flame-retardant sound-insulation PP/ABS/PA6 alloy material, a preparation method and application thereof, and Chinese patent No. CN 107599564A discloses a preparation method of a PET/PP composite sound-absorption material, but the materials disclosed by the patents have the problems of complex preparation process and high cost.
Disclosure of Invention
In order to solve the defects and problems in the prior art, the invention provides a high noise-resistant scratch-resistant polypropylene composite material, which comprises the following components in parts by weight:
further, the polypropylene is one of homo-polypropylene or co-polypropylene or a mixture thereof.
Further, the nano-silica has a specific surface area of 400-1000m2A silica material with a pore diameter of 10-40nm and a particle diameter of 150-800 nm.
Furthermore, the nano sodium bicarbonate is a sheet-shaped nano sodium bicarbonate material with the particle size of 150-800 nm.
Further, the toughening agent is one of ethylene octene copolymer and ethylene butene copolymer or a mixture thereof.
Further, the scratch-resistant agent is silicone master batch made of silicone.
Further, the compatilizer is maleic anhydride graft copolymerization propylene, and comprises one or a mixture of more of ethylene propylene copolymer grafted maleic anhydride, ethylene octene copolymer grafted maleic anhydride and polypropylene grafted maleic anhydride.
Further, the antioxidant is one or a combination of 1010, 168, G814 and PS 802; the lubricant is one of PE wax, stearate or the combination of PE wax and stearate.
The invention also provides a preparation method of the high-noise-resistance scratch-resistant polypropylene composite material, which comprises the following steps:
step one, weighing the required polypropylene, nano silicon dioxide, toughening agent, scratch resistant agent, antioxidant, compatilizer and lubricant according to the weight ratio, and blending the mixture in a high-speed mixer at 40HZ for 2 min;
step two, adding the mixture obtained in the step one into a double-screw extruder through a weighing machine and a feeding machine, and carrying out melt blending extrusion; wherein the temperature of the first/second area of the double-screw extruder is 185-;
step three, carrying out water cooling, drying and grain cutting on the sample strips extruded in the step two to obtain primary particles;
and step four, adding nano sodium bicarbonate with a corresponding weight ratio into the particles obtained in the step three, fully and uniformly mixing, and carrying out micro-foaming injection molding to obtain the micro-foaming polypropylene composite material with high noise resistance and scraping resistance.
The invention also provides application of the high-noise-resistant scratch-resistant polypropylene composite material in automotive upholstery.
The invention controls the proportion of nanometer pores formed by silicon dioxide in the material and micron pores formed by sodium bicarbonate by adjusting foaming agents of nanometer silicon dioxide and nanometer sodium bicarbonate, thereby enhancing the absorption effect of the material on sound waves.
The nano silicon dioxide has more nano micropores, the addition of the substance can greatly increase the porosity and the specific surface area of the material, the addition of the foaming agent nano sodium bicarbonate enables a workpiece obtained by injection molding to have more micron-sized holes, so that the porosity and the specific surface area of the material are further increased, when external sound waves pass through the material, the sound waves are firstly reflected in the micron-sized holes and then transmitted into the nano pores in the nano silicon dioxide for reflection, and the sound is weakened in the reflection process.
By adjusting the proportion of the nano-scale micropores to the micro-scale micropores and adding the silicone master batch, the optimal anti-noise material can be obtained, and the material not only has good anti-noise capability, but also has good scratch resistance. The finally obtained material can be well applied to interior trim parts such as automobile door plates and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention provides examples 1-3 and comparative examples 1-4.
Table 1: compositions and proportions of examples and comparative examples in weight proportions
The preparation methods of the above examples and comparative examples include: step one, weighing the required polypropylene, nano silicon dioxide, toughening agent, scratch resistant agent, antioxidant, compatilizer and lubricant according to the weight ratio, and blending the mixture in a high-speed mixer at 40HZ for 2 min;
step two, adding the mixture obtained in the step one into a double-screw extruder through a weighing machine and a feeding machine, and carrying out melt blending extrusion; wherein the temperature of the first/second area of the double-screw extruder is 185-;
step three, carrying out water cooling, drying and grain cutting on the sample strips extruded in the step two to obtain primary particles;
and step four, adding a certain weight of nano sodium bicarbonate into the particles obtained in the step three, fully and uniformly mixing, and carrying out micro-foaming injection molding to obtain the micro-foaming polypropylene composite material with high noise resistance and scraping resistance.
A certain amount of the high noise resistant and scratch resistant polypropylene composite was prepared by examples 1 to 3 and comparative examples 1 to 4 and tested under the same conditions, and the experimental results are shown in Table 2. The sound loss experiment test method comprises the following steps: the foaming material prepared by the method is made into a closed box shape (30 x 30cm, thickness 5mm) by using glass cement, a decibel tester is placed in the closed box shape, the whole device is 0.5 meter away from a sound source, and the sound source is 70 decibels. The ratio of the nano-scale micropores to the micro-scale micropores is obtained by testing the specific surface area of the sample before and after the micro-foaming. The color difference is measured by using the prepared sample as a standard sample and a sample subjected to a ten-scratch test (test standard: PV 3952) as a test sample. The flexural modulus test method is referred to GB/T9341-2008/ISO 178: 2001.
TABLE 2 Experimental results for examples 1-3 and comparative examples 1-4
From the test in table 2, it can be seen that the sound loss gradually increases with the increase of the ratio of the nano-pores to the micro-pores, which indicates that the increase of the ratio of the two pores is helpful for sound insulation and noise reduction of the material, while when the ratio is too low, the noise-resistant effect of the material is not as good as that of the material with a larger ratio of the two pores due to the fact that the sound waves do not have enough nano-pores to further weaken the sound waves after passing through the micro-pores, and when the ratio is too high, the noise-resistant effect of the material is reduced due to the sudden decrease of the micro-pores, which may be because the balance of the cooperative noise reduction of the large and small pores is broken, so that the efficiency is reduced, and when the addition amount of the nano-silica is further increased, the problems of the material such as difficult blanking easily occur, and the usage amount of the nano-silica is not increased. Meanwhile, when nano calcium carbonate is added for micro-foaming treatment, the scratch resistance of the material is obviously reduced, and due to the introduction of the scratch-resistant agent silicone master batch, the scratch resistance of the material is obviously improved, namely the color difference is reduced from 2.24 to 1.13, and then the scratch resistance of the material is further improved along with the increase of the filling of the nano silicon dioxide. From the modulus, the material also has certain strength.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The high-noise-resistance scratch-resistant polypropylene composite material is characterized by comprising the following components in parts by weight:
45.6 to 76.2 portions of polypropylene
5-10 parts of toughening agent
15-35 parts of silicon dioxide
0.2 to 0.6 portion of sodium bicarbonate
0.8-2 parts of scratch-resistant agent
2-6 parts of compatilizer
0.2 to 0.6 portion of antioxidant
0.2-0.6 part of lubricant;
the silicon dioxide has the specific surface area of 400-1000m2A silica material with a pore diameter of 10-40nm and a particle diameter of 150-800 nm; the sodium bicarbonate is a sheet sodium bicarbonate material with the particle size of 150-800 nm.
2. The high noise resistant and scratch resistant polypropylene composite material according to claim 1, wherein the polypropylene is one of homo polypropylene or co-polypropylene or a mixture thereof.
3. The high noise resistant and scratch resistant polypropylene composite according to claim 1, wherein the toughening agent is one of ethylene octene copolymer, ethylene butene copolymer or a mixture thereof.
4. The polypropylene composite material with high noise resistance and scratch resistance according to claim 1, wherein the scratch resistance agent is silicone master batch made of silicone.
5. The high noise resistant and scratch resistant polypropylene composite material according to claim 1, wherein the compatibilizer comprises one or a mixture of ethylene propylene copolymer grafted maleic anhydride, ethylene octene copolymer grafted maleic anhydride and polypropylene grafted maleic anhydride.
6. The high noise resistant scratch resistant polypropylene composite according to claim 1, wherein the antioxidant is one of 1010, 168, PS802 or a combination thereof; the lubricant is one of PE wax, stearate or the combination of PE wax and stearate.
7. A method for preparing the high noise resistant scratch resistant polypropylene composite material according to claim 1, which comprises the following steps:
step one, weighing the required polypropylene, silicon dioxide, toughening agent, scratch resistant agent, antioxidant, compatilizer and lubricant according to the weight ratio, and blending for 2min at 40HZ in a high-speed mixer;
step two, adding the mixture obtained in the step one into a double-screw extruder through a weighing machine and a feeding machine, and carrying out melt blending extrusion; wherein the temperature of the first/second area of the double-screw extruder is 185-;
step three, carrying out water cooling, drying and grain cutting on the sample strips extruded in the step two to obtain primary particles;
and step four, adding sodium bicarbonate with a corresponding weight ratio into the particles obtained in the step three, fully and uniformly mixing, and carrying out micro-foaming injection molding to obtain the high-noise-resistance scratch-resistant polypropylene composite material.
8. Use of the high noise resistant scratch resistant polypropylene composite of claim 1 in automotive upholstery.
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| CN110982171B (en) * | 2019-11-26 | 2022-07-01 | 金旸（厦门）新材料科技有限公司 | Low-density toughened polypropylene open-cell micro-foaming material |
| CN111875884A (en) * | 2020-07-31 | 2020-11-03 | 海信（山东）空调有限公司 | Filter screen and air conditioner |
| CN114854130B (en) * | 2022-05-19 | 2024-04-12 | 北鸿科(天津)科技有限公司 | High-impact-resistance halogen-free flame-retardant polypropylene composite material and preparation method thereof |
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| CN106432897A (en) * | 2015-08-07 | 2017-02-22 | 现代自动车株式会社 | Foamable masterbatch and polyolefin resin composition with excellent expandability and direct metallizing property |
| CN108546385A (en) * | 2018-03-13 | 2018-09-18 | 上海普利特复合材料股份有限公司 | A kind of automobile seamless gasbag instrument board high-performance polypropylene compound material and preparation method thereof |
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| US6946495B2 (en) * | 2004-01-28 | 2005-09-20 | Zwynenburg James L | Foamable composition using recycled or offgrade polypropylene |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106432897A (en) * | 2015-08-07 | 2017-02-22 | 现代自动车株式会社 | Foamable masterbatch and polyolefin resin composition with excellent expandability and direct metallizing property |
| CN108546385A (en) * | 2018-03-13 | 2018-09-18 | 上海普利特复合材料股份有限公司 | A kind of automobile seamless gasbag instrument board high-performance polypropylene compound material and preparation method thereof |
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