CN112625361A - Low-odor high-thermal-oxidative-aging-resistance glass fiber reinforced polypropylene composite material and preparation method thereof - Google Patents
Low-odor high-thermal-oxidative-aging-resistance glass fiber reinforced polypropylene composite material and preparation method thereof Download PDFInfo
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/10—Reinforcing macromolecular compounds with loose or coherent fibrous material characterised by the additives used in the polymer mixture
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/14—Copolymers of propene
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K7/00—Use of ingredients characterised by shape
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Abstract
The invention discloses a low-odor low-emission high-thermal-aging-resistance glass fiber reinforced polypropylene composite material and a preparation method thereof, wherein the glass fiber reinforced polypropylene composite material is prepared from the following raw materials in parts by weight: 20-30 parts of sheet-like layered material, 45-70 parts of conventional polypropylene resin, 10-20 parts of glass fiber, 1-3 parts of compatilizer, 1-2 parts of carbon black master batch and 0.5-1.5 parts of antioxidant. Compared with the common materials with the same glass fiber addition amount in the market, the short glass fiber reinforced polypropylene composite material prepared by the invention contains the layered material in the raw materials, and utilizes the characteristic physical adsorption characteristic and the layered structure characteristic of the layered material, thereby not only reducing the emission problems of odor VOC and the like in the production and subsequent use processes of the glass fiber reinforced material, but also having better heat resistance. The final product has excellent emission performance, is easy to demould, maintains higher physical property, and can be widely applied to the fields of automobile materials, 5G product shells and the like.
Description
Technical Field
The invention relates to the technical field of polypropylene materials, in particular to a novel low-odor high-thermal-oxidative-aging-resistance glass fiber reinforced polypropylene composite material and a preparation method thereof. The material is suitable for manufacturing automobile appearance parts, electric fittings, 5G base station shells and the like.
Background
With the rise of the 5G industry, new challenges are provided for traditional materials, on one hand, base stations are greatly reduced compared with the previous generation, and on the other hand, the heating value of products is far higher than before due to the increase of data communication volume. This requires materials which, on the one hand, can maintain high performance while also increasing the resistance to thermal ageing. The miniaturization of the base station means that the possibility of installing a specific component or device indoors in later development is increased, which also puts demands on the emission performance of the product. The glass fiber reinforced polypropylene material has higher tensile strength, bending strength and modulus, is favorable for realizing the application of plastics on supporting parts such as 5G device shells and the like, and keeps a long-time stable working state on the premise of reducing the total weight of parts. Therefore, the reinforced polypropylene material has quite considerable prospect in the application of the 5G industry.
The traditional glass fiber material used for reinforcing the polypropylene material has some defects which need to be perfected continuously. Although having excellent performance, the material often has a certain degree of pungent odor during the production process and the subsequent use process due to the characteristics of the material. The problem of environmental resistance of products in subsequent use needs to be solved urgently, and meanwhile, after the short fiber reinforced material is subjected to injection molding, flow marks are easy to generate, and the defect is difficult to avoid when parts with complex structures are manufactured.
From the production requirements of enterprises, the laminated material is selected as one of the main raw materials for production in the production of the chopped glass fiber reinforced polypropylene material. The laminated material has a unique interlayer sliding structure, a certain lubricating effect is achieved when the laminated material is separated from a mold after plastic injection molding, the problem of flow marks can be effectively solved, the interlayer pores have adsorption and solidification effects on odor and small molecules, the concentrations of the odor small molecules and the small molecules involved in VOC detection can be effectively reduced, and finally the laminated structure has a physical blocking effect, so that oxygen atoms can be effectively prevented from entering a system to induce oxidative aging, and the thermal-oxidative aging resistance of the material is improved. Meanwhile, the production process is changed, the generation of odor micromolecules of the product is reduced by adopting a mode of extruding twice, the raw materials are distributed more uniformly, and the performance fluctuation of the product is effectively inhibited. The low-carbon environmental protection concept is taken as guidance, and on the premise of ensuring that the product performance meets the standard of common materials, the glass fiber reinforced polypropylene product added with the layered material improves the impregnation effect of glass fibers by adjusting the production process, avoids the damage of the glass fibers and effectively improves the mechanical property of the produced reinforced polypropylene product.
Disclosure of Invention
The invention aims to solve the technical problems of bad smell and excessive VOC (volatile organic compounds) caused by the production and subsequent use of the existing chopped glass fiber reinforced polypropylene material, difficulty in manufacturing a complex structure of a product, poor thermal oxidation aging performance and the like. Providing a novel layered material composite glass fiber reinforced polypropylene composite material:
in order to solve the technical problems, the invention adopts the following technical scheme:
the low-odor high-thermal-oxidative-aging-resistance glass fiber reinforced polypropylene composite material is prepared from the following raw materials in parts by weight: 10-15 parts of sheet-like layered material, 45-70 parts of conventional polypropylene resin, 20-20 parts of glass fiber, 1-3 parts of compatilizer, 1-2 parts of carbon black master batch and 0.5-1.5 parts of antioxidant.
The lamellar material is at least one of magnesium aluminum hydrotalcite, zinc aluminum hydrotalcite, montmorillonite, spinel and kaolinite.
The conventional polypropylene base material is copolymerized PP, and MFR of the conventional polypropylene base material is less than or equal to 20.
The glass fiber is chopped continuous yarn alkali-free glass fiber: the diameter of the monofilament is 5-15 μm.
The compatilizer is at least one of low-odor low-emission maleic anhydride grafted PP, silane coupling agent and acrylic acid grafted PP.
The antioxidant is at least one of general type 168, 619F, 1010, 1076 and 1035.
The low-odor high-thermal-oxidative-aging-resistance glass fiber reinforced polypropylene composite material and the preparation method thereof comprise the following steps:
(1) uniformly mixing and extruding the layered material powder and conventional polypropylene, and granulating to obtain a semi-finished product raw material, wherein a vacuum system is added in the extrusion process.
(2) Mixing the semi-finished raw material, the compatilizer, the antioxidant and the carbon black master batch at a high speed according to a proportion and stirring.
(3) And (3) uniformly mixing the materials in the step (2), then feeding the mixture into a double-screw extruder, wherein the processing temperature is 200-240 ℃, the rotating speed of a host is 300-600rpm, adding an ultrasonic dispersion device at the position of a stirring machine head, and applying ultrasonic waves with fixed frequency (20-40 Hz) to the position of the machine head. The short-cut continuous yarn alkali-free glass fiber is added into a feeding port on the main side, and a vacuum pumping system is added in the stirring process.
(4) The sectional extrusion devices are respectively at 200 ℃, 220 ℃, 220 ℃ and 230 ℃, and then the reinforced polypropylene granules with the length of 2-4mm are prepared by water tank cooling and grain cutting of a grain cutting machine, and the weight content of the fiber is 10-20%.
Compared with the common materials with the same glass fiber addition amount in the market, the short glass fiber reinforced polypropylene composite material prepared by the invention contains the layered material in the raw materials, and utilizes the characteristic physical adsorption characteristic and the layered structure characteristic of the layered material, thereby not only reducing the emission problems of odor VOC and the like in the production and subsequent use processes of the glass fiber reinforced material, but also having better heat resistance. The final product has excellent emission performance, is easy to demould, maintains higher physical property, and can be widely applied to the fields of automobile materials, 5G product shells and the like.
Detailed Description
The following is a further explanation of the present disclosure in connection with the examples, but the examples are not intended to limit the present disclosure in any way.
The compositions and the mass percentages of the components contained in the comparative examples and examples of the present invention are shown in Table 1 below
Table 1: compositions and contents of formulations of examples and comparative examples
| Raw material ratio | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 |
| Powder of layered material | 10 | 15 | 15 | 0 | 0 |
| Polypropylene | 67 | 62 | 52 | 77 | 67 |
| Glass fiber | 20 | 20 | 30 | 20 | 30 |
| Compatilizer | 2 | 2 | 2 | 2 | 2 |
| Antioxidant agent | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Carbon black masterbatch | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
The preparation procedure was as per one example of table:
(1) uniformly mixing and extruding the layered material powder and conventional polypropylene, and granulating to obtain a semi-finished product raw material, wherein a vacuum system is added in the extrusion process.
(2) Mixing the semi-finished raw material, the compatilizer, the antioxidant and the carbon black master batch at a high speed according to a proportion and stirring.
(3) And (3) uniformly mixing the materials in the step (2), then feeding the mixture into a double-screw extruder, wherein the processing temperature is 200-.
(4) The segmented extrusion devices are respectively at 200 ℃, 220 ℃, 220 ℃ and 230 ℃, and then are cooled by a water tank and cut into reinforced polypropylene granules with the length of 2-4mm by a cutting machine, and the weight content of the fiber is 20-30%;
the preparation method is prepared according to the table in a comparative way:
(1) mixing and stirring the raw materials of polypropylene, compatilizer, antioxidant and carbon black master batch at a high speed according to a proportion.
(2) And (2) uniformly mixing the materials in the step (1), then feeding the mixture into a double-screw extruder, wherein the processing temperature is 200-.
(3) The segmented extrusion devices are respectively at 200 ℃, 220 ℃, 220 ℃ and 230 ℃, and then are cooled by a water tank and cut into reinforced polypropylene granules with the length of 2-4mm by a cutting machine, and the weight content of the fiber is 20-30%;
the test method and the detection standard of the invention refer to Jili automobile material standard Q/JL J124011-2015, and the odor evaluation method is Jili grade 10 evaluation method. The results of the performance tests of the inventive and comparative examples are shown in table 2 below:
table 2: results of testing the Performance of the examples and comparative examples
As can be seen from the table, compared with the long glass fiber reinforced polypropylene material produced by the conventional production mode, the mechanical property of the product produced by compounding the layered material is improved to a certain extent, and the product can meet the common material standard of a host factory. When the content of the glass fiber is increased, the performance improvement effect is more obvious. The enhancement shows that the glass fibers are dispersed more uniformly and oriented more uniformly in the microstructure, which is an important guarantee for eliminating the flow mark defect after the subsequent injection molding. Through the structural characteristics of the layered material, the residual micromolecules of the product graft and the raw material micromolecules generated in the production process are inhibited, so that the odor grade of the product can be effectively improved. Meanwhile, the heat-resistant aging resistance of the product is greatly improved. The method is greatly helpful for optimizing and expanding the application field of the subsequent material emission performance.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (7)
1. The glass fiber reinforced polypropylene composite material with low odor and high thermal-oxidative aging resistance is characterized in that: the composition comprises the following raw materials in parts by weight: 10-15 parts of sheet-like layered material, 45-70 parts of conventional polypropylene resin, 20-20 parts of glass fiber, 1-3 parts of compatilizer, 1-2 parts of carbon black master batch and 0.5-1.5 parts of antioxidant.
2. The low-odor high thermal oxidative aging resistant glass fiber reinforced polypropylene composite material as claimed in claim 1, wherein: the lamellar material is at least one of magnesium aluminum hydrotalcite, zinc aluminum hydrotalcite, montmorillonite, spinel and kaolinite.
3. The low-odor high thermal oxidative aging resistant glass fiber reinforced polypropylene composite material as claimed in claim 1, wherein: the conventional polypropylene base material is copolymerized PP, and MFR of the conventional polypropylene base material is less than or equal to 20.
4. The low-odor high thermal oxidative aging resistant glass fiber reinforced polypropylene composite material as claimed in claim 1, wherein: the glass fiber is chopped continuous yarn alkali-free glass fiber: the diameter of the monofilament is 5-15 μm.
5. The low-odor high thermal oxidative aging resistant glass fiber reinforced polypropylene composite material as claimed in claim 1, wherein: the compatilizer is at least one of low-odor low-emission maleic anhydride grafted PP, silane coupling agent and acrylic acid grafted PP.
6. The low-odor high thermal oxidative aging resistant glass fiber reinforced polypropylene composite material as claimed in claim 1, wherein: the antioxidant is at least one of general type 168, 619F, 1010, 1076 and 1035.
7. The method for preparing the low-odor high thermal oxidative aging resistance glass fiber reinforced polypropylene composite material according to any one of claims 1 to 6, comprising the following steps:
(1) uniformly mixing and extruding layered material powder and conventional polypropylene, and granulating to obtain a semi-finished product raw material, wherein the extrusion process is added into a vacuum system;
(2) mixing and stirring the semi-finished product raw material, the compatilizer, the antioxidant and the carbon black master batch at a high speed according to a ratio;
(3) and (3) uniformly mixing the materials in the step (2), then feeding the mixture into a double-screw extruder, wherein the processing temperature is 200-240 ℃, the rotating speed of a host is 300-600rpm, adding an ultrasonic dispersion device at the position of a stirring machine head, and applying ultrasonic waves with fixed frequency (20-40 Hz) to the position of the machine head. Adding the chopped continuous yarn alkali-free glass fiber into a feeding port on the main side, and adding a vacuum pumping system in the stirring process;
(4) the sectional extrusion devices are respectively at 200 ℃, 220 ℃, 220 ℃ and 230 ℃, and then the reinforced polypropylene granules with the length of 2-4mm are prepared by water tank cooling and grain cutting of a grain cutting machine, and the weight content of the fiber is 10-20%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113214565A (en) * | 2021-06-25 | 2021-08-06 | 浙江晟祺实业有限公司 | Novel layered material composite long glass fiber reinforced polypropylene composite material and preparation method thereof |
| CN114835975A (en) * | 2022-03-25 | 2022-08-02 | 成都金发科技新材料有限公司 | Low-warpage glass fiber reinforced polypropylene composite material and preparation method and application thereof |
| CN116285103A (en) * | 2023-03-03 | 2023-06-23 | 广东聚石化学股份有限公司 | Aging-resistant polypropylene composite material and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108485066A (en) * | 2018-04-08 | 2018-09-04 | 成都工业学院 | A kind of automobile-used PP composite material of environmental protection type, less smell and preparation method thereof |
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- 2020-12-15 CN CN202011469130.1A patent/CN112625361A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108485066A (en) * | 2018-04-08 | 2018-09-04 | 成都工业学院 | A kind of automobile-used PP composite material of environmental protection type, less smell and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113214565A (en) * | 2021-06-25 | 2021-08-06 | 浙江晟祺实业有限公司 | Novel layered material composite long glass fiber reinforced polypropylene composite material and preparation method thereof |
| CN114835975A (en) * | 2022-03-25 | 2022-08-02 | 成都金发科技新材料有限公司 | Low-warpage glass fiber reinforced polypropylene composite material and preparation method and application thereof |
| CN116285103A (en) * | 2023-03-03 | 2023-06-23 | 广东聚石化学股份有限公司 | Aging-resistant polypropylene composite material and preparation method and application thereof |
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Application publication date: 20210409 |