CN112552601A - Polypropylene composite material suitable for automotive interior parts and preparation method thereof - Google Patents
Polypropylene composite material suitable for automotive interior parts and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/004—Additives being defined by their length
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/016—Additives defined by their aspect ratio
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention discloses a polypropylene composite material suitable for automobile interior parts and a preparation method thereof, wherein the polypropylene composite material comprises, by weight, 60-90% of polypropylene, 0-15% of inorganic filler, 0-20% of elastomer PO E5, 0.5-5% of fiber fluff points, 1-6% of compatilizer, 1-15% of natural plant fibers and 0.2-3% of auxiliary agent.
Description
Technical Field
The invention relates to the field of materials, in particular to a polypropylene composite material suitable for automotive interior parts and a preparation method thereof.
Background
As a general plastic, polypropylene is widely applied to interior and exterior trims of automobiles, such as automobile instrument panels, upright post decorative panels, door interior decorative panels, auxiliary instrument panels and the like, due to the advantages of low cost, low density, good chemical resistance, good processing technology, easy recycling and the like. However, polypropylene also has the performance problems of low mechanical strength, poor impact performance, poor heat resistance and the like, so that the polypropylene needs to be modified in the actual use process to meet the performance requirements of various parts.
In the development of automotive products, airbag blasting configurations are added to the cockpit, the copilot, the pillars, and even the seats in consideration of the safety of passengers. The side curtain is generally an airbag installed at a junction of a pillar (a pillar to C pillar or D pillar) of a vehicle and a ceiling, and the airbag is ejected to protect the safety of a driver and passengers when the vehicle collides. At the moment of blasting, the stand column is subjected to huge impact force of the air bag, but the stand column is required to have no factors influencing driver safety, such as fragment flying, sheet metal parts separation and the like. Therefore, the column material with the requirement of side air curtain blasting has very high toughness requirement, especially under the condition of low temperature.
In addition, for automobile products, consumers no longer satisfy the requirement of being only used as a transportation tool, but to a great extent, the automobile products are a movable private space, so that the consumers are more and more concerned about the quality, the technological sense and the humanization of the products. Based on the demand, the prior art improves the perception quality of the automotive interior by adopting the technologies of soft coating or low-pressure injection molding and the like. However, the application of the technology is limited due to high cost, complex process and the like, so that the material with low cost and good appearance is developed to replace soft coating or low-pressure injection molding, the quality of automotive upholsteries can be improved, the application cost can be effectively controlled, and the comprehensive competitiveness of products is improved.
Furthermore, since the mandatory standard of air quality in the vehicle is about to be implemented, the air quality in the vehicle is also a hot spot researched by various major host factories and material manufacturers, the polypropylene material is used as a main raw material of interior plastic parts, and the odor of the polypropylene material must be strictly controlled, but the polypropylene material can emit peculiar odor under high temperature (extrusion and injection molding), and the odor emitted by the polypropylene material during high temperature treatment is difficult to change from the material. The odor solution in the prior art is realized by subsequent heat treatment, such as baking for 2-10 h at the temperature of 100-130 ℃, however, the heat treatment method has low production efficiency and huge energy consumption.
Therefore, there is a need to develop a polypropylene composite material with high impact resistance, low cost, good appearance and good odor to meet the requirements of automotive interior parts, especially automotive pillars.
Disclosure of Invention
An object of the present invention is to provide a polypropylene composite material suitable for automotive interior parts, which has advantages of high impact resistance, low cost, good appearance and good odor.
It is another object of the present invention to provide a method for preparing a polypropylene composite material suitable for automotive interior parts, which has advantages of high impact resistance, low cost, good appearance and good smell.
In order to achieve the above object, the present invention provides a polypropylene composite material suitable for automotive interior parts, comprising, by weight:
for example, the weight percentage of polypropylene may be 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, or 90%; the weight percentage of inorganic filler may be 0, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15%; the weight percentage of elastomer POE may be 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, or 20%; the weight percentage of fiber fluff points may be 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%; the weight percentage of the compatibilizer may be 1%, 2%, 3%, 4%, 5%, or 6%; the weight percentage of natural plant fiber may be 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, or 15%.
Further, the polypropylene is homo-polypropylene or block co-polypropylene, and the melt index of the polypropylene is 15-60 g/10min under the conditions that the test temperature is 230 ℃ and the weight is 2.16 kg.
Further, the inorganic filler comprises talcum powder, the particle size range of the talcum powder is 1-5 microns, and the inorganic filler can selectively comprise one or more of calcium carbonate, calcium sulfate and kaolin.
Further, the elastomer POE is a linear ethylene-octene copolymer with the density of 0.88g/cm3～0.90g/cm3Under the conditions that the test temperature is 190 ℃ and the weight is 2.16kg, the melt index range of the POE is 0.5-14 g/10 min.
Further, the fiber fluff points are the fiber fluff points with the diameter-length ratio of less than or equal to 1: 12, wherein the length of the fiber fluff point is 1-4 mm. Specifically, the fiber fluff points can be dyed, the color can be adjusted, the fiber fluff points are suitable for various material color systems, the interior decoration scheme application of different colors can be met, and the application width is expanded.
Further, the compatilizer is maleic anhydride grafted polypropylene resin PP-g-MAH, the grafting rate of maleic anhydride is 0.5-1.3%, and the melt index of the compatilizer is 40-150 g/10min under the conditions that the test temperature is 190 ℃ and the weight is 2.16 kg.
Further, the fiber length of the natural plant fiber is 1-10 mm.
Further, the auxiliary agent comprises 0.1-2% of antioxidant and 0.1-1% of light stabilizer by weight percentage. For example, the antioxidant is 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, or 2%; light stabilizers are 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1%.
Further, the antioxidant comprises a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is at least one of hindered phenol and thioester antioxidant; the auxiliary antioxidant is at least one of phosphite and ester antioxidant; the light stabilizer is one or a combination of more of triazine light stabilizer, benzotriazole light stabilizer, salicylate light stabilizer and hindered amine light stabilizer. For example, the primary antioxidant is at least one of 3114, 1010 and DSTP; the secondary antioxidant is at least one of 618 and 168.
In order to achieve the above object, the present invention also provides a method for preparing the above polypropylene composite, the preparation method comprising the steps of:
(1) weighing raw materials for preparing the polypropylene composite material according to the following weight ratio, wherein the raw materials comprise, by weight, 60-90% of polypropylene, 0-15% of inorganic filler, 5-20% of elastomer POE, 0.5-5% of fiber fluff points, 1-6% of compatilizer, 1-15% of natural plant fibers and 0.2-3% of auxiliary agent;
(2) placing the raw materials in a mixer to mix until uniform; the rotating speed of the mixer is 500-1800 rpm, and the mixing time is 3-5 minutes;
(3) placing the uniformly mixed raw materials in an extruder, and preparing the polypropylene composite material after melt extrusion, wherein the residence time of the whole extrusion process is 1-2 minutes, the extrusion pressure is 12-18 MPa, and the temperature of each zone of the screw is as follows: 190-200 ℃ in the first zone, 200-210 ℃ in the second zone, 210-230 ℃ in the third zone and 205-220 ℃ in the fourth zone. The extruder can be a double-screw extruder, and the melt extrusion is generally carried out by the working procedures of cooling, granulating, drying and the like.
Compared with the prior art, the polypropylene composite material suitable for the automotive interior parts and the preparation method thereof provided by the invention have the following beneficial effects:
(1) the formula of the polypropylene composite material is improved by adding fiber fluff points in a polypropylene system, and the stand column prepared from the polypropylene composite material has a flocking-imitating effect, replaces a soft coating or low-pressure injection molding technology, and reduces the cost by 50%;
(2) the compatilizer improves the interface between fiber fluff points and polypropylene, reduces the damage of the fluff points to the polypropylene interface, thereby not reducing the toughening and reinforcing effects of talcum powder and elastomer POE in the system, and the prepared polypropylene composite material has both rigidity and toughness so as to meet the requirement of the side air curtain blasting of the automobile stand column without fragmentation and can pass the blasting verification of the side air curtain of the automobile stand column;
(3) the natural plant fibers are added into the formula system, so that the prepared polypropylene composite material not only has the flocking simulating effect, but also has the effect of improving the odor intensity and type, and the natural plant fibers have a synergistic enhancement effect on the flocking simulating effect of the fiber fluff points; in addition, long-time subsequent heat treatment is not needed, so that the production efficiency is greatly improved, and the energy consumption is reduced;
(4) the polypropylene composite material is used for producing the automobile stand column, and has the advantages of simple preparation process, high qualification rate and low production cost.
The polypropylene composite material solves the problems of consumer complaints of 'plastic feeling', 'high gloss', 'poor smell' and the like of automotive interiors, and has the advantages of high impact resistance, low cost, good appearance and good smell.
Detailed Description
The "ranges" disclosed herein are in the form of lower and upper limits. There may be one or more lower limits, and one or more upper limits, respectively. The given range is defined by the selection of a lower limit and an upper limit. The selected lower and upper limits define the boundaries of the particular range. All ranges that can be defined in this manner are inclusive and combinable, i.e., any lower limit can be combined with any upper limit to form a range. For example, ranges of 60-120 and 80-110 are listed for particular parameters, with the understanding that ranges of 60-110 and 80-120 are also contemplated. Furthermore, if the minimum range values 1 and 2 are listed, and if the maximum range values 3, 4, and 5 are listed, the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In the present invention, all embodiments and preferred embodiments mentioned herein may be combined with each other to form a new technical solution, if not specifically stated.
In the present invention, all the technical features mentioned herein and preferred features may be combined with each other to form a new technical solution, if not specifically stated.
In the present invention, all the steps mentioned herein may be performed sequentially or randomly, if not specifically stated, but preferably sequentially.
In the polypropylene composite formulations of the examples and comparative examples, the polypropylene was copolymerized polypropylene petrochemical-produced from Mitsu (Tianjin) under the trade name PP511MK40T, and the melt flow rate thereof was 29g/10min (test conditions: temperature 230 ℃ C., weight 2.16 Kg); the inorganic filler is 10000 meshes of talcum powder, and the average grain diameter is 1.3 mu m; the POE elastomer is Engage8180 produced by Dow corporation of America; the fiber fluff points are gray commercial products, and the ratio of diameter to length is less than or equal to 1: 12, the length is 1-4 mm; the main antioxidant is DSTP produced by British ICE company, the chemical name is octadecyl thiodipropionate, 3114 produced by Ciba company, the chemical name is 3, 5-di-tert-butyl-4-hydroxy benzyl diethyl phosphate, the auxiliary antioxidant is 168 produced by Ciba company, the chemical name is tris (2, 4-di-tert-butyl benzyl) phosphite ester, and the natural plant fiber is plant straw fiber sold in the market. The light stabilizer is at least one of triazine light stabilizer, benzotriazole light stabilizer, salicylate light stabilizer and hindered amine light stabilizer, and the light stabilizer and other additives are not added in the following examples and comparative examples, so that the main performance of the polypropylene composite material is not influenced.
The preparation method of the polypropylene composite material comprises the following steps:
(1) weighing raw materials for preparing the polypropylene composite material according to the following weight ratio, wherein the raw materials comprise, by weight, 60-90% of polypropylene, 0-15% of inorganic filler, 5-20% of elastomer POE, 0.5-5% of fiber fluff points, 1-6% of compatilizer, 1-15% of natural plant fibers and 0.2-3% of auxiliary agent;
(2) placing the raw materials in a mixer to mix until uniform; the rotating speed of the mixer is 500-1800 rpm, and the mixing time is 3-5 minutes;
(3) the uniformly mixed raw materials are placed in an extruder, and a polypropylene composite material is prepared after melt extrusion, wherein the rotating speed of a screw is 120-320 revolutions per minute, the residence time of the whole extrusion process is 1-2 minutes, the extrusion pressure is 12-18 MPa, and the temperature of each partition of the screw is as follows: 190-200 ℃ in the first zone, 200-210 ℃ in the second zone, 210-230 ℃ in the third zone and 205-220 ℃ in the fourth zone. The extruder may alternatively be a twin screw extruder.
Performance evaluation and implementation criteria:
and (3) drying the plastic particle material prepared by the preparation method in a forced air drying oven at 100 ℃ for 2-3 hours, and then carrying out injection molding on the dried granules on an injection molding machine to prepare a sample. Tensile properties were carried out according to ISO527, with specimen dimensions of 170X 10X 4mm dumbbell specimen at a tensile speed of 50 mm/min; the bending property test is carried out according to ISO178, the size of a test sample is 80 multiplied by 10 multiplied by 4mm, the bending speed is 2mm/min, and the span is 64 mm; the impact strength of the notch of the simply supported beam is carried out according to ISO179, the size of a test sample is 80 multiplied by 10 multiplied by 4mm, the notch adopts A type in the standard, the flocking simulating effect and the odor evaluation adopt an internal evaluation method, the sampling amount of the odor evaluation sample is 50cm2。
The comprehensive performance of the material is judged by testing the obtained notch impact strength, tensile strength, bending modulus, flocking simulating effect, odor strength and odor type. The example formulations, comparative formulations and various performance test results are shown in the following tables:
TABLE 1 formulations (unit:%) of examples 1 to 8 and comparative examples 1 to 3.
TABLE 2 test results of examples 1 to 8 and comparative examples 1 to 3
"O" indicates the imitation flocking effect, and more O's indicate better imitation flocking effect.
As can be seen from comparison of examples 1-8 with comparative example 1, the polypropylene composite material prepared by adding the fiber fluff dots and the natural plant fibers has a good flocking-like effect, and meanwhile, the odor intensity is remarkably reduced and the odor type is changed. From the embodiment 1-3, it can be seen that the higher the addition content of the fiber fluff points is, the better the addition content is, the higher the fluff content is, and the flocking-imitating effect of the material can be reduced; from examples 3-4, it can be seen that the increase of the content of the compatibilizer does not significantly improve the impact resistance of the material; from the examples 2 and 5 to 6, it can be seen that the addition amount of the elastomer does not affect the flocking-imitating effect of the material, and the higher the addition amount of the elastomer is, the higher the notch impact strength of the material is, but the modulus of the material is rapidly reduced; from example 8, it is seen that the natural plant fiber is added in too much amount, the odor is too strong, and the odor of the material is deteriorated; as can be seen from the example 4 and the comparative examples 2-3, the flocking effect of the example 4 is better than that of the comparative example 2, and the odor effect of the example 4 is equivalent to that of the comparative example 3; because the fiber fluff spots are small in length and difficult to disperse, the appearance is easy to have aggregation points (defects) and the effect is influenced, and because the natural plant fibers (large in length) are added, the dispersion of the fiber fluff spots is more uniform, and the synergistic enhancement effect is achieved, so that the flocking effect of the embodiment 4 is better than that of the comparative example 2 in which the fiber fluff spots are added singly.
Compared with the prior art, the polypropylene composite material suitable for the automotive interior parts and the preparation method thereof provided by the invention have the following beneficial effects:
(1) the formula of the polypropylene composite material is improved by adding fiber fluff points in a polypropylene system, and the upright post decorative plate prepared from the polypropylene composite material has a flocking-imitating effect, replaces a soft coating or low-pressure injection molding technology, and reduces the cost by 50%;
(2) the compatilizer improves the interface between fiber fluff points and polypropylene, reduces the damage of the fluff points to the polypropylene interface, thereby not reducing the toughening and reinforcing effects of talcum powder and elastomer POE in the system, ensuring that the prepared polypropylene composite material has both rigidity and toughness so as to meet the requirement of side air curtain blasting of the automobile upright post decorative plate, and can not crack and pass the blasting verification of the side air curtain of the automobile upright post decorative plate;
(3) the natural plant fibers are added into the formula system, so that the prepared polypropylene composite material not only has the flocking simulating effect, but also has the effect of improving the odor intensity and type, and the natural plant fibers have a synergistic enhancement effect on the flocking simulating effect of the fiber fluff points; in addition, long-time subsequent heat treatment is not needed, so that the production efficiency is greatly improved, and the energy consumption is reduced;
(4) the polypropylene composite material is used for producing the automobile upright post decorative plate, and has the advantages of simple preparation process, high qualification rate and low production cost.
The polypropylene composite material solves the problems of consumer complaints of 'plastic feeling', 'high gloss', 'poor smell' and the like of automotive interiors, and has the advantages of high impact resistance, low cost, good appearance and good smell.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. A polypropylene composite suitable for use in automotive interior trim comprising, in weight percent:
2. the polypropylene composite material according to claim 1, wherein the polypropylene is homo-polypropylene or block co-polypropylene, and the melt index of the polypropylene is in a range of 15 to 60g/10min under the conditions that the test temperature is 230 ℃ and the weight is 2.16 kg.
3. The polypropylene composite material according to claim 1, wherein the inorganic filler comprises talc powder, the particle size of the talc powder ranges from 1 μm to 5 μm, and the inorganic filler can selectively comprise one or more of calcium carbonate, calcium sulfate and kaolin.
4. The polypropylene composite of claim 1, wherein the elastomeric POE is a linear ethylene-octene copolymer having a density of 0.88g/cm3～0.90g/cm3Under the conditions that the test temperature is 190 ℃ and the weight is 2.16kg, the melt index range of the POE is 0.5-14 g/10 min.
5. The polypropylene composite of claim 1, wherein the fiber fluff points are of a diameter to length ratio of ≤ 1: 12, wherein the length of the fiber fluff point is 1-4 mm.
6. The polypropylene composite material according to claim 1, wherein the compatibilizer is a maleic anhydride grafted polypropylene resin PP-g-MAH, the grafting ratio of maleic anhydride is 0.5-1.3%, and the melt index of the compatibilizer is 40-150 g/10min under the conditions that the test temperature is 190 ℃ and the weight is 2.16 kg.
7. The polypropylene composite according to claim 1, wherein the natural plant fibers have a fiber length of between 1 and 10 mm.
8. The polypropylene composite material of claim 1, wherein the auxiliary agent comprises 0.1-2% by weight of an antioxidant and 0.1-1% by weight of a light stabilizer.
9. The polypropylene composite of claim 8, wherein the antioxidant comprises a primary antioxidant and a secondary antioxidant, the primary antioxidant being at least one of a hindered phenol antioxidant and a thioester antioxidant; the auxiliary antioxidant is at least one of phosphite and ester antioxidant; the light stabilizer is one or a combination of more of triazine light stabilizer, benzotriazole light stabilizer, salicylate light stabilizer and hindered amine light stabilizer.
10. A process for the preparation of a polypropylene composite according to any one of claims 1 to 9, comprising the steps of:
(1) weighing raw materials for preparing the polypropylene composite material according to the following weight ratio, wherein the raw materials comprise, by weight, 60-90% of polypropylene, 0-15% of inorganic filler, 5-20% of elastomer POE, 0.5-5% of fiber fluff points, 1-6% of compatilizer, 1-15% of natural plant fibers and 0.2-3% of auxiliary agent;
(2) placing the raw materials in a mixer to mix until uniform;
(3) placing the uniformly mixed raw materials in an extruder, and preparing the polypropylene composite material after melt extrusion, wherein the residence time of the whole extrusion process is 1-2 minutes, the extrusion pressure is 12-18 MPa, and the temperature of each zone of the screw is as follows: 190-200 ℃ in the first zone, 200-210 ℃ in the second zone, 210-230 ℃ in the third zone and 205-220 ℃ in the fourth zone.
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| CN114395224A (en) * | 2021-12-28 | 2022-04-26 | 浙江普利特新材料有限公司 | Degradable antibacterial flocking-imitating composite material for automobile and preparation method thereof |
| CN114605739A (en) * | 2022-03-28 | 2022-06-10 | 金发科技股份有限公司 | Nanofiber modified PP composite material and preparation method and application thereof |
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