CN111205554A - Polypropylene composite material and preparation method thereof - Google Patents

Polypropylene composite material and preparation method thereof Download PDF

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Publication number
CN111205554A
CN111205554A CN202010098538.6A CN202010098538A CN111205554A CN 111205554 A CN111205554 A CN 111205554A CN 202010098538 A CN202010098538 A CN 202010098538A CN 111205554 A CN111205554 A CN 111205554A
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polypropylene
mixture
antioxidant
mixing
polypropylene composite
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冯亦奇
蒋晓东
李春进
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Jiangsu Bolin Plastics Co ltd
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Jiangsu Bolin Plastics Co ltd
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods
    • B29B7/005—Methods for mixing in batches
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • 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
    • 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
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The application discloses a polypropylene composite material and a preparation method thereof, and relates to the field of high polymer materials. The polypropylene composite material comprises the following components in percentage by mass: 10-50 wt.% of homopolymerized polypropylene, 5-45 wt.% of copolymerized polypropylene, 15-40 wt.% of filling material, 2-10 wt.% of toughening agent, 1-5 wt.% of compatilizer, 0.1-0.5 wt.% of antioxidant and 0.1-1 wt.% of other auxiliary agents. The method has the advantages that the type and the amount of the polypropylene and the type and the amount of the toughening agent are adjusted, and the prepared product is extruded and granulated in a batch feeding, material mixing by processes and sectional feeding mode, so that the product is high in dimensional stability, high in glossiness and stable in product performance.

Description

Polypropylene composite material and preparation method thereof
Technical Field
The application relates to the field of high polymer materials, in particular to a polypropylene composite material and a preparation method thereof.
Background
With the scientific and technological progress and the enhancement of environmental protection consciousness, various high-gloss and spraying-free plastic products are more and more widely applied, and particularly, high-gloss materials represented by ABS and HIPS are widely applied to the traditional fields of household appliances, tools and the like and the emerging fields of new energy automobiles and the like.
The polypropylene is one of five general-purpose plastics, has the characteristics of good strength, rigidity, transparency, electrical property and the like, is widely used in the fields of buildings, packaging, communication, electronic and electric appliances, household goods and the like, and a part of alloy or composite polypropylene materials are developed to replace high-gloss ABS, HIPS and the like. However, the high-gloss polypropylene product is mainly used in the form of pure material or low-filling composite material, the gloss of the product is greatly reduced when the filling modification amount is high, and the product has obvious difference compared with ABS and HIPS, so that the performance and the application range of the material are limited.
In conclusion, it is very necessary to improve the glossiness of the polypropylene composite material on the premise of ensuring high strength, high toughness and low shrinkage rate, and the application range of the polypropylene composite material can be greatly expanded.
Disclosure of Invention
The polypropylene composite material and the preparation method thereof aim to provide the polypropylene composite material, the homo-polypropylene and the block co-polypropylene in proper proportion are used as matrixes, the type and proportion of the toughening agent are adjusted, and the type and proportion of the filling material and the fiber reinforced material are adjusted at the same time, so that the prepared product has the advantages of good strength and toughness, high dimensional stability and high glossiness.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions: a polypropylene composite material comprises the following components in percentage by mass: 10-50 wt.% of homopolymerized polypropylene, 5-45 wt.% of copolymerized polypropylene, 15-40 wt.% of filling material, 2-10 wt.% of toughening agent, 1-5 wt.% of compatilizer, 0.1-0.5 wt.% of antioxidant and 0.1-1 wt.% of other auxiliary agents.
In the technical scheme, the product prepared by adjusting the type and the amount of the polypropylene and the type and the amount of the toughening agent has the advantages of better strength and toughness, high dimensional stability, high glossiness and stable product performance.
Further, according to the examples of the present application, the molding shrinkage of the homo-polypropylene is 1-2%.
Further, according to the embodiment of the present application, wherein the copolymerized polypropylene is block copolymerized polypropylene.
Further, according to the embodiment of the present application, wherein the filling material is a granular filling material or a fibrous reinforcing material or a combination of the granular filling material and the fibrous reinforcing material.
Further in accordance with embodiments herein, wherein the toughening agent is an ethylene-octene copolymer or an ethylene-propylene copolymer or a mixture of both.
Further, according to the embodiment of the present application, wherein the compatibilizer is maleic anhydride grafted polypropylene or maleic anhydride grafted linear high density polyethylene.
Further, according to the embodiment of the present application, the antioxidant is a mixture of two or three of the primary antioxidant 1010 and the secondary antioxidant 626 or the secondary antioxidant 618.
Further, according to the embodiments of the present application, other additives include a lubricant, a light stabilizer, and a toner, among others.
Further, according to the examples of the present application, wherein the block copolymer polypropylene has a molding shrinkage of 1 to 2% and a density of 0.89 to 0.91g/cm3。
Further, according to the embodiment of the present application, wherein the particulate filler is one of glass beads, calcium carbonate, and barium sulfate.
Further, according to the embodiment of the present application, wherein the fiber reinforced material is one of glass fiber, PTFE fiber, aramid fiber, and carbon fiber.
Further, according to the embodiment of the application, the mass ratio of the main antioxidant to the auxiliary antioxidant is 1: 1-3.
Further, according to the embodiment of the present application, wherein the lubricant is one or two mixtures of polypropylene wax, polyethylene wax, stearate and silicone.
Further, according to the embodiment of the present application, the particle filling material is glass beads, calcium carbonate, and barium sulfate, and the particle morphology of the glass beads, calcium carbonate, and barium sulfate is non-porous spherical particles, and the particle size is 1250-.
Further, according to the embodiment of the application, the diameter of the fiber is 7-12 μm.
In order to achieve the above object, the present application also discloses a preparation method for preparing the above polypropylene composite material, comprising the following steps:
weighing the following raw materials: weighing the homopolymerized polypropylene, the copolymerized polypropylene, the filling material, the toughening agent, the compatilizer, the antioxidant and other auxiliary agents according to the weight percentage;
mixing at medium speed: adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, and uniformly mixing to obtain a first mixture;
high-speed mixing: putting the mixture I into a high-speed mixer, and then continuously adding the prepared homopolymerized polypropylene and other auxiliary agents into the high-speed mixer to be uniformly mixed to obtain a mixture II;
cold mixing: putting the mixture II into a cold mixer for cold mixing to obtain a mixture III;
extruding: and conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, metering and adding the filling material through a lateral feeding port II, wherein the filling material is a fiber reinforced material, cooling the extruded material strips through a water tank, granulating through a granulator, drying through a dryer, and packaging to obtain a finished product.
In the technical scheme, the type and the amount of the polypropylene and the type and the amount of the toughening agent are adjusted, and the product is extruded and granulated in the modes of batch feeding, material mixing by processes and sectional feeding, so that the product is good in strength and toughness, high in dimensional stability, high in glossiness and stable in product performance.
Further, according to the embodiment of the present application, wherein in the high-speed mixing step, a part of the filler is added to the high-speed mixer to be mixed, and a part of the filler is a granular filler.
Further, according to the present embodiment, in the extruding step, a part of the filling material is metered through the lateral feeding port, and a part of the filling material is granular filling material.
Further, according to the embodiment of the application, the materials are mixed and cooled step by step according to the processes of medium-speed mixing, high-speed mixing and cold mixing.
Further, according to the embodiment of the application, the rotating speed of the double-screw extruder is 250-400rpm, and the extrusion temperature is set to be 190-220 ℃.
Compared with the prior art, the method has the following beneficial effects: the method has the advantages that the type and the amount of the polypropylene and the type and the amount of the toughening agent are adjusted, and the prepared product is good in strength and toughness, high in dimensional stability, high in glossiness and stable in product performance by batch feeding, material mixing by processes and sectional feeding extrusion granulation.
Detailed Description
In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more apparent, embodiments of the present invention are described in further detail below. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships only for the convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art that the embodiments may be practiced without these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.
The application discloses a polypropylene composite material, which comprises 10-50 wt.% of homopolymerized polypropylene, 5-45 wt.% of copolymerized polypropylene, 15-40 wt.% of filling material, 2-10 wt.% of toughening agent, 1-5 wt.% of compatilizer, 0.1-0.5 wt.% of antioxidant and 0.1-1 wt.% of other auxiliary agents. By adjusting the type and the amount of the polypropylene and the type and the amount of the toughening agent, the prepared product has the advantages of better strength and toughness, high dimensional stability, high glossiness and stable product performance.
The components are described in detail below.
(1) Matrix resin: homo-and co-polypropylene
In a polypropylene composite material described herein, the matrix resin is a mixture of homo-polypropylene and co-polypropylene, the homo-polypropylene having a relatively high crystallinityHigh mechanical strength and good heat resistance, and the polypropylene copolymer has higher impact strength, and the mixture of the two can be ensured. Wherein, the homopolymerized polypropylene accounts for 10-50 wt%, and the molding shrinkage is 1-2%. The ratio of the copolymerized polypropylene is 5-45 wt.%, specifically adopts block copolymerized polypropylene, and preferably adopts molding shrinkage of 1-2% and density of 0.89-0.91g/cm3The block copolymerized polypropylene of (1). Specifically, the homo-polypropylene in the application adopts Achieve produced by Exxon Mobil chemical industryTMAdvanced PP6302E1, the copolymerized polypropylene is Achieve produced by Exxon Mobil chemical industryTMAdvanced PP8285E1。
(2) Filling material
In the polypropylene composite material, the content of the filling material is 15-40 wt.%, so that the rigidity of the polypropylene composite material can be improved, and the addition of other raw materials can be reduced, thereby reducing the cost. In the present application, the filling material is specifically selected from a granular filling material or a fibrous reinforcing material or a combination of the granular filling material and the fibrous reinforcing material. The particle filling material is one of glass beads, calcium carbonate and barium sulfate, and the particle size is 1250-3250 meshes; the fiber reinforced material is one of glass fiber, PTFE fiber, aramid fiber and carbon fiber, and the fiber diameter is 7-12 μm. Preferably, the granular filling material can adopt light calcium carbonate with the grain diameter of 2000 meshes, and is produced by Lingshou county and mineral product processing plants; the fiber reinforced material preferably adopts glass fiber, in particular ECS7.0-4.5 produced by megalite group limited company, and the surface of the glass fiber can be treated by silane coupling agent.
(3) Toughening agent
In one polypropylene composite described herein, the amount of toughening agent is 2 to 10 wt.% to enhance the toughness and increase the elongation at break of the polypropylene composite described herein. In the present application, the toughening agent may be an ethylene-octene copolymer or an ethylene-propylene copolymer or a mixture of the two, preferably an ethylene-octene copolymer, specifically POE5061 produced by exxonmobil chemical industry.
(4) Compatilizer
In the polypropylene composite material, the content of the compatibilizer is 1 to 5 wt.%, and maleic anhydride grafted polypropylene or maleic anhydride grafted linear high-density polyethylene can be specifically selected, so that the compatibility among the components can be improved, and the stability of the polypropylene composite material is further improved. Specifically, the maleic anhydride grafted polypropylene with the model number of ST-5, which is produced by Nanjing plastita polymer technology Co., Ltd, is preferably adopted, and the grafting rate is 0.5-1%.
(5) Antioxidant agent
In one polypropylene composite described herein, the antioxidant is present in an amount of 0.1 to 0.5 wt.% to retard or inhibit the oxidation process of the polypropylene composite described herein, thereby preventing aging and extending the useful life of the polypropylene composite. In the application, the antioxidant is a mixture of two or three of the primary antioxidant 1010 and the secondary antioxidant 626 or the secondary antioxidant 618, preferably a mixture of the primary antioxidant 1010 and the secondary antioxidant 626 is adopted, and the mass ratio of the primary antioxidant to the secondary antioxidant is 1: 1-3. In the present application, both primary antioxidant 1010 and secondary antioxidant 626 may be from Shanghai Lier New materials, Inc.
(6) Other auxiliaries
In one of the polypropylene composites described herein, the other auxiliaries mainly comprise lubricants, light stabilizers and toners, respectively, for facilitating demolding, improving stability and coloring, in an amount of 0.1 to 1 wt.%. Wherein, the lubricant can adopt one or two mixtures of polypropylene wax, polyethylene wax, stearate and organic silicon, and preferably adopts polypropylene wax produced by Qingdao Seno New Material Co., Ltd, and the melting point is 150-160 ℃. Any of the commercially available light stabilizers and toners can be used.
Based on the same inventive concept, the application also discloses a preparation method of the polypropylene composite material, which comprises the following steps:
weighing the following raw materials: weighing 10-50 wt.% of homopolymerized polypropylene, 5-45 wt.% of copolymerized polypropylene, 15-40 wt.% of filling material, 2-10 wt.% of toughening agent, 1-5 wt.% of compatilizer, 0.1-0.5 wt.% of antioxidant and 0.1-1 wt.% of other auxiliary agents according to the weight percentage;
mixing at medium speed, adding the prepared polypropylene copolymer, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 3-5min at the rotating speed of 200-400rpm, and uniformly mixing to obtain a mixture I;
high-speed mixing, namely putting the mixture I into a high-speed mixer, then continuously adding the prepared homopolymerized polypropylene and other auxiliary agents into the high-speed mixer, mixing for 3-5min at the rotating speed of 600-800rpm, and uniformly mixing to obtain a mixture II; during the high-speed mixing process, part of the filling material can be added simultaneously, wherein the filling material is specifically granular filling, and the addition amount of the granular filling is 0-10 wt.%;
cold mixing: placing the mixture II into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 50-70rpm, and maintaining the temperature at 30-35 ℃ to obtain a mixture III;
extruding: conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, metering and adding a filling material through a lateral feeding port II, wherein the filling material is a fiber reinforced material, cooling the extruded material strip through a water tank, cooling the extruded material strip at the temperature of 20-40 ℃, granulating through a granulator, drying at the rotation speed of 400-900rpm through a dryer, and packaging to obtain a finished product; after the mixture three is fed into the twin-screw extruder, a portion of the filler material, which is in the form of granules, can be metered in via a lateral feed opening, the amount of granules being in the range from 5 to 10 wt.%.
In the technical scheme, the materials are mixed and cooled step by step according to the processes of medium-speed mixing, high-speed mixing and cold mixing, and are extruded and granulated in a batch feeding, material mixing by processes and sectional feeding mode, so that the prepared product is good in strength and toughness, high in size stability, high in glossiness and stable in product performance.
Wherein the rotation speed of the double-screw extruder is 250-400rpm, and the extrusion temperature is 190-220 ℃.
The present application is further illustrated by the following examples, but the present application is not limited to these examples.
[ example 1 ]
Weighing 50 wt.% of homopolymerized polypropylene, 20.9 wt.% of copolymerized polypropylene, 5 wt.% of calcium carbonate and 15 wt.% of glass fiber, 6 wt.% of ethylene-octene copolymer, 2 wt.% of maleic anhydride grafted polypropylene, 0.22 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner in percentage by weight, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 3min at the rotating speed of 300rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homo-polypropylene, the lubricant, the light stabilizer, the toner and 5 wt.% of calcium carbonate into the high-speed mixer, mixing for 5min at the rotating speed of 650rpm, and uniformly mixing to obtain a mixture II;
putting the mixture II into a cold mixer for cold mixing, and maintaining the rotating speed of the cold mixer at 50rpm and the temperature at 30 ℃ to obtain a mixture III;
and conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, metering and adding 15 wt.% of glass fiber through a lateral feeding port II, wherein the rotating speed of the double-screw extruder is 300rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the mixture is cut into granules through a granulator, the rotating speed of the granulator is 600rpm, and the mixture is dried by a dryer and packaged to obtain a finished product.
[ example 2 ]
Weighing 50 wt.% of homopolymerized polypropylene, 10.9 wt.% of copolymerized polypropylene, 10 wt.% of calcium carbonate and 20 wt.% of glass fiber, 6 wt.% of ethylene-octene copolymer, 2 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 3min at the rotating speed of 300rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homo-polypropylene, the lubricant, the light stabilizer, the toner and 5 wt.% of calcium carbonate into the high-speed mixer, mixing for 5min at the rotating speed of 650rpm, and uniformly mixing to obtain a mixture II;
putting the mixture II into a cold mixer for cold mixing, and maintaining the rotating speed of the cold mixer at 50rpm and the temperature at 30 ℃ to obtain a mixture III;
conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, adding 5 wt.% of calcium carbonate through a lateral feeding port I, adding 20 wt.% of glass fiber through a lateral feeding port II, setting the temperature of each zone of the extruder to be 190 ℃, cooling extruded strips through a water tank, wherein the temperature of cooling water is 40 ℃, granulating through a granulator, drying at the rotating speed of 600rpm of the granulator, and packaging to obtain a finished product.
[ example 3 ]
Weighing 50 wt.% of homopolymerized polypropylene, 7.9 wt.% of copolymerized polypropylene, 15 wt.% of calcium carbonate and 15 wt.% of glass fiber, 6 wt.% of ethylene-octene copolymer, 5 wt.% of maleic anhydride grafted polypropylene, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 400rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homo-polypropylene, the lubricant, the light stabilizer, the toner and 5 wt.% of calcium carbonate into the high-speed mixer, mixing for 5min at the rotating speed of 650rpm, and uniformly mixing to obtain a mixture II;
putting the mixture II into a cold mixer for cold mixing, and maintaining the rotating speed of the cold mixer at 50rpm and the temperature at 30 ℃ to obtain a mixture III;
conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, adding 10 wt.% of calcium carbonate through a lateral feeding port I, adding 15 wt.% of glass fiber through a lateral feeding port II, setting the temperature of each zone of the extruder to be 190 ℃, cooling extruded strips through a water tank, wherein the temperature of cooling water is 40 ℃, granulating through a granulator, drying at the rotating speed of 600rpm of the granulator, and packaging to obtain a finished product.
[ example 4 ]
Weighing 35 wt.% of homopolymerized polypropylene, 22.9 wt.% of copolymerized polypropylene, 30 wt.% of glass fiber, 3 wt.% of ethylene-octene copolymer and 3 wt.% of ethylene-propylene copolymer, 5 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 400rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homopolymerized polypropylene, the lubricant, the light stabilizer and the toner into the high-speed mixer, mixing for 3min at the rotating speed of 700rpm, and uniformly mixing to obtain a mixture II;
putting the mixture II into a cold mixer for cold mixing, and maintaining the rotating speed of the cold mixer at 50rpm and the temperature at 30 ℃ to obtain a mixture III;
conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, adding 30 wt.% of glass fiber through a lateral feeding port II in a metering mode, wherein the rotating speed of the double-screw extruder is 350rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the mixture is cut into granules through a granulator, the rotating speed of the granulator is 650rpm, and the mixture is dried through a dryer and packaged to obtain a finished product.
[ example 5 ]
Weighing 11 wt.% of homopolymerized polypropylene, 44.9 wt.% of copolymerized polypropylene, 10 wt.% of calcium carbonate and 20 wt.% of glass fiber, 7 wt.% of ethylene-octene copolymer and 3 wt.% of ethylene-propylene copolymer, 3 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 3min at the rotating speed of 300rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homo-polypropylene, the lubricant, the light stabilizer, the toner and 10 wt.% of calcium carbonate into the high-speed mixer, mixing for 3min at the rotating speed of 700rpm, and uniformly mixing to obtain a mixture II;
placing the mixture II into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 70rpm, and maintaining the temperature at 30 ℃ to obtain a mixture III;
and conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, metering and adding 20 wt.% of glass fiber through a lateral feeding port II, wherein the rotating speed of the double-screw extruder is 300rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the mixture is cut into granules through a granulator, the rotating speed of the granulator is 650rpm, and the mixture is dried through a dryer and packaged to obtain a finished product.
[ example 6 ]
Weighing 12.5 wt.% of homopolymerized polypropylene, 48.4 wt.% of copolymerized polypropylene, 10 wt.% of calcium carbonate and 10 wt.% of glass fiber, 7 wt.% of ethylene-octene copolymer and 3 wt.% of ethylene-propylene copolymer, 3 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of an antioxidant 1010 and an antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 3min at the rotating speed of 700rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homo-polypropylene, the lubricant, the light stabilizer, the toner and 5 wt.% of calcium carbonate into the high-speed mixer, mixing for 3min at the rotating speed of 700rpm, and uniformly mixing to obtain a mixture II;
placing the mixture II into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 70rpm, and maintaining the temperature at 30 ℃ to obtain a mixture III;
conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, adding 5 wt.% of calcium carbonate through a lateral feeding port I, adding 15 wt.% of glass fiber through a lateral feeding port II, setting the temperature of each zone of the extruder to be 190 ℃, cooling extruded strips through a water tank, wherein the temperature of cooling water is 40 ℃, granulating through a granulator, and drying at the rotating speed of 650rpm through a dryer, and packaging to obtain a finished product.
[ example 7 ]
Weighing 15 wt.% of homopolymerized polypropylene, 40.9 wt.% of copolymerized polypropylene, 10 wt.% of calcium carbonate and 20 wt.% of glass fiber, 7 wt.% of ethylene-octene copolymer and 3 wt.% of ethylene-propylene copolymer, 3 wt.% of maleic anhydride grafted LDPE, 0.22 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 400rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homo-polypropylene, the lubricant, the light stabilizer, the toner and 5 wt.% of calcium carbonate into the high-speed mixer, mixing for 3min at the rotating speed of 700rpm, and uniformly mixing to obtain a mixture II;
placing the mixture II into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 70rpm, and maintaining the temperature at 30 ℃ to obtain a mixture III;
conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, metering and adding 5 wt.% of calcium carbonate through a lateral feeding port I, metering and adding 20 wt.% of glass fiber through a lateral feeding port II, wherein the rotating speed of the double-screw extruder is 350rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the extruding strips are cut into granules through a granulator, the rotating speed of the granulator is 650rpm, and the drying machine is used for drying and packaging to obtain a finished product.
[ example 8 ]
Weighing 20 wt.% of homopolymerized polypropylene, 35.9 wt.% of copolymerized polypropylene, 15 wt.% of calcium carbonate and 15 wt.% of glass fiber, 7 wt.% of ethylene-octene copolymer and 3 wt.% of ethylene-propylene copolymer, 3 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 400rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homo-polypropylene, the lubricant, the light stabilizer, the toner and 5 wt.% of calcium carbonate into the high-speed mixer, mixing for 3min at the rotating speed of 700rpm, and uniformly mixing to obtain a mixture II;
placing the mixture II into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 70rpm, and maintaining the temperature at 35 ℃ to obtain a mixture III;
conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, adding 10 wt.% of calcium carbonate through a lateral feeding port I, adding 15 wt.% of glass fiber through a lateral feeding port II, setting the temperature of each zone of the extruder to be 190 ℃, cooling extruded strips through a water tank, wherein the temperature of cooling water is 40 ℃, granulating through a granulator, and drying at the rotating speed of 650rpm through a dryer, and packaging to obtain a finished product.
[ example 9 ]
Weighing 25 wt.% of homopolymerized polypropylene, 29.9 wt.% of copolymerized polypropylene, 10 wt.% of calcium carbonate and 30 wt.% of glass fiber, 7 wt.% of ethylene-octene copolymer, 1 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 200rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homo-polypropylene, the lubricant, the light stabilizer, the toner and 5 wt.% of calcium carbonate into the high-speed mixer, mixing for 3min at the rotating speed of 700rpm, and uniformly mixing to obtain a mixture II;
placing the mixture II into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 70rpm, and maintaining the temperature at 35 ℃ to obtain a mixture III;
conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, adding 5 wt.% of calcium carbonate through a lateral feeding port I, adding 30 wt.% of glass fiber through a lateral feeding port II, setting the temperature of each zone of the extruder to be 190 ℃, cooling extruded strips through a water tank, wherein the temperature of cooling water is 40 ℃, granulating through a granulator, and drying at the rotating speed of 650rpm through a dryer, and packaging to obtain a finished product.
[ example 10 ]
27.5 wt.% of homopolymerized polypropylene, 37.4 wt.% of copolymerized polypropylene, 10 wt.% of calcium carbonate and 20 wt.% of glass fiber, 3 wt.% of ethylene-octene copolymer, 1 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 200rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homo-polypropylene, the lubricant, the light stabilizer, the toner and 5 wt.% of calcium carbonate into the high-speed mixer, mixing for 3min at the rotating speed of 800rpm, and uniformly mixing to obtain a mixture II;
placing the mixture II into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 60rpm, and maintaining the temperature at 35 ℃ to obtain a mixture III;
and conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, metering and adding 20 wt.% of glass fiber through a lateral feeding port II, wherein the rotating speed of the double-screw extruder is 300rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the mixture is cut into granules through a granulator, the rotating speed of the granulator is 650rpm, and the mixture is dried through a dryer and packaged to obtain a finished product.
[ example 11 ]
Weighing 30 wt.% of homopolymerized polypropylene, 34.9 wt.% of copolymerized polypropylene, 15 wt.% of calcium carbonate and 15 wt.% of glass fiber, 3 wt.% of ethylene-propylene copolymer, 1 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 200rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homo-polypropylene, the lubricant, the light stabilizer, the toner and 5 wt.% of calcium carbonate into the high-speed mixer, mixing for 3min at the rotating speed of 800rpm, and uniformly mixing to obtain a mixture II;
placing the mixture II into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 60rpm, and maintaining the temperature at 35 ℃ to obtain a mixture III;
conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, adding 10 wt.% of calcium carbonate through a lateral feeding port I, adding 15 wt.% of glass fiber through a lateral feeding port II, setting the temperature of each zone of the extruder to be 190 ℃, cooling extruded strips through a water tank, wherein the temperature of cooling water is 40 ℃, granulating through a granulator, and drying at the rotating speed of 650rpm through a dryer, and packaging to obtain a finished product.
[ example 12 ]
Weighing 40 wt.% of homopolymerized polypropylene, 24.9 wt.% of copolymerized polypropylene, 30 wt.% of glass fiber, 3 wt.% of ethylene-octene copolymer, 1 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of an antioxidant 1010 and an antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of a light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 200rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homopolymerized polypropylene, the lubricant, the light stabilizer and the toner into the high-speed mixer, mixing for 3min at the rotating speed of 800rpm, and uniformly mixing to obtain a mixture II;
placing the mixture II into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 60rpm, and maintaining the temperature at 30 ℃ to obtain a mixture III;
conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, adding 30 wt.% of glass fiber through a lateral feeding port II in a metering mode, wherein the rotating speed of the double-screw extruder is 350rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the mixture is cut into granules through a granulator, the rotating speed of the granulator is 650rpm, and the mixture is dried through a dryer and packaged to obtain a finished product.
[ example 13 ]
Weighing 45 wt.% of homopolymerized polypropylene, 16.9 wt.% of copolymerized polypropylene, 5 wt.% of calcium carbonate, 25 wt.% of glass fiber, 5 wt.% of ethylene-octene copolymer, 2 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 400rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homo-polypropylene, the lubricant, the light stabilizer, the toner and 5 wt.% of calcium carbonate into the high-speed mixer, mixing for 5min at the rotating speed of 650rpm, and uniformly mixing to obtain a mixture II;
placing the mixture II into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 60rpm, and maintaining the temperature at 30 ℃ to obtain a mixture III;
and conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, metering and adding 25 wt.% of glass fiber through a lateral feeding port II, wherein the rotating speed of the double-screw extruder is 350rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the mixture is cut into granules through a granulator, the rotating speed of the granulator is 650rpm, and the mixture is dried through a dryer and packaged to obtain a finished product.
[ example 14 ]
Weighing 50 wt.% of homopolymerized polypropylene, 26.9 wt.% of copolymerized polypropylene, 15 wt.% of glass fiber, 5 wt.% of ethylene-propylene copolymer, 2 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of an antioxidant 1010 and an antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of a light stabilizer and 0.4 wt.% of toner in percentage by weight, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 300rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homopolymerized polypropylene, the lubricant, the light stabilizer and the toner into the high-speed mixer, mixing for 5min at the rotating speed of 650rpm, and uniformly mixing to obtain a mixture II;
placing the mixture II into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 60rpm, and maintaining the temperature at 30 ℃ to obtain a mixture III;
and conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, metering and adding 15 wt.% of glass fiber through a lateral feeding port II, wherein the rotating speed of the double-screw extruder is 300rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the mixture is cut into granules through a granulator, the rotating speed of the granulator is 650rpm, and the mixture is dried through a dryer and packaged to obtain a finished product.
Comparative example 1
Weighing 50 wt.% of homopolymerized polypropylene, 20.9 wt.% of copolymerized polypropylene, 5 wt.% of calcium carbonate and 15 wt.% of glass fiber, 6 wt.% of ethylene-octene copolymer, 2 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer, the antioxidant, the homo-polypropylene, the calcium carbonate, the lubricant, the light stabilizer and the toner into a medium-speed mixer, mixing for 3min at the rotating speed of 300rpm, and uniformly mixing to obtain a mixture I;
and conveying the mixture to a main feeding hopper of a double-screw extruder through a spiral feeder, metering and adding 15 wt.% of glass fiber through a lateral feeding port II, wherein the rotating speed of the double-screw extruder is 300rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the mixture is cut into granules through a granulator, the rotating speed of the granulator is 600rpm, and the mixture is dried by a dryer and packaged to obtain a finished product.
Comparative example 2
Weighing 35 wt.% of homopolymerized polypropylene, 22.9 wt.% of copolymerized polypropylene, 30 wt.% of glass fiber, 3 wt.% of ethylene-octene copolymer and 3 wt.% of ethylene-propylene copolymer, 5 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
mixing the prepared co-polypropylene, the toughening agent, the compatilizer, the antioxidant, the homo-polypropylene, the lubricant, the light stabilizer and the toner in a high-speed mixer at the rotating speed of 700rpm for 3min, and uniformly mixing to obtain a mixture I;
putting the mixture I into a cold mixer for cold mixing, wherein the rotating speed of the cold mixer is 50rpm, and the temperature is maintained at 30 ℃ to obtain a mixture II;
conveying the mixture II to a main feeding hopper of a double-screw extruder through a spiral feeder, adding 30 wt.% of glass fiber through a lateral feeding port II in a metering mode, wherein the rotating speed of the double-screw extruder is 350rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the extruding strips are cut into granules through a granulator, the rotating speed of the granulator is 600rpm, drying is carried out through a dryer, and packaging is carried out to obtain finished products.
Comparative example 3
57.9 wt.% of homopolymerized polypropylene, 30 wt.% of glass fiber, 3 wt.% of ethylene-octene copolymer and 3 wt.% of ethylene-propylene copolymer, 5 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner are weighed according to the weight percentage, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 400rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homopolymerized polypropylene, the lubricant, the light stabilizer and the toner into the high-speed mixer, mixing for 5min at the rotating speed of 650rpm, and uniformly mixing to obtain a mixture II;
putting the mixture II into a cold mixer for cold mixing, and maintaining the rotating speed of the cold mixer at 50rpm and the temperature at 30 ℃ to obtain a mixture III;
conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, adding 30 wt.% of glass fiber through a lateral feeding port II in a metering mode, wherein the rotating speed of the double-screw extruder is 350rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the mixture is cut into granules through a granulator, the rotating speed of the granulator is 600rpm, and the mixture is dried through a dryer and packaged to obtain a finished product.
Comparative example 4
57.940 wt.% of homopolymerized polypropylene, 30 wt.% of glass fiber, 6 wt.% of ethylene-octene copolymer, 5 wt.% of maleic anhydride grafted LDPE, 0.2 wt.% of a mixture of antioxidant 1010 and antioxidant 626, 0.2 wt.% of lubricant polypropylene wax, 0.3 wt.% of light stabilizer and 0.4 wt.% of toner are weighed according to the weight percentage, wherein the mass ratio of the antioxidant 1010 to the antioxidant 626 is 1: 1.2;
adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, mixing for 5min at the rotating speed of 400rpm, and uniformly mixing to obtain a mixture I;
putting the mixture I into a high-speed mixer, continuously adding the prepared homopolymerized polypropylene, the lubricant, the light stabilizer and the toner into the high-speed mixer, mixing for 3min at the rotating speed of 650rpm, and uniformly mixing to obtain a mixture II;
putting the mixture II into a cold mixer for cold mixing, and maintaining the rotating speed of the cold mixer at 50rpm and the temperature at 30 ℃ to obtain a mixture III;
conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, adding 30 wt.% of glass fiber through a lateral feeding port II in a metering mode, wherein the rotating speed of the double-screw extruder is 350rpm, the temperature of each zone of the extruder is set to be 190 ℃, extruding strips are cooled through a water tank, the temperature of cooling water is 40 ℃, the mixture is cut into granules through a granulator, the rotating speed of the granulator is 600rpm, and the mixture is dried through a dryer and packaged to obtain a finished product.
The finished products obtained in examples 1 to 14 and comparative examples 1 to 4 were tested as follows:
tensile strength (MPa): measured according to ISO527-1/2: 2012;
elongation at break (%): measured according to ISO527-1/2: 2012;
bending strength (MPa): measured according to ISO178: 2010;
flexural modulus (MPa): measured according to ISO178: 2010;
impact of simply supported beam gap (KJ/m)2): measured according to ISO179-1: 2010;
molding shrinkage (%): measured according to ISO 294-4-2003;
surface gloss: the plate for the glossiness test is prepared by injection molding at a charging barrel temperature of 215 ℃ and a mold temperature of 80 ℃; the measurement was carried out according to GB8807-1988 at an angle of incidence of 60 ℃.
The test results are summarized in Table 1.
Table 1 shows the performance test results of examples 1-14 and comparative examples 1-4 of the high-dimensional stability, high-impact resistance and high-gloss polypropylene composite material:
item Degree of gloss Tensile strength Elongation at break Bending strength Flexural modulus Notched impact (23 ℃ C.) Molding shrinkage ratio
Unit of Incident angle of 60 ° MPa ％ MPa MPa kJ/m2 ％
Example 1 84.3 47.7 11.3 51 2619 36 0.9
Example 2 80.5 54.3 9.7 73 3685 29 0.7
Example 3 83.7 49.3 14.9 64 3341 31 0.7
Example 4 78.6 63.4 7.7 83 3526 28 0.8
Example 5 78.3 50.6 12.8 63 2830 38 0.8
Example 6 82.4 42.3 15.7 45 2320 43 0.9
Example 7 78.9 50.7 10.8 66 3057 39 0.8
Example 8 81.6 46.5 13.5 53 2723 40 0.8
Example 9 76.5 66.5 8.5 86 3840 35 0.7
Example 10 79.4 58.3 6.3 76 3735 32 0.8
Example 11 81.1 54.7 7.2 73 3679 29 0.7
Example 12 83.9 66.2 6.8 87 3684 26 0.8
Example 13 85.8 63.8 7.3 85 3730 28 0.9
Example 14 86.2 45.6 13.2 47 2594 33 0.9
Comparative example 1 62.6 34.2 23.5 42 2217 34 1.3
Comparative example 2 54.8 57.2 5.9 78.5 3131 15 1.2
Comparative example 3 50.4 45.6 8.5 63.8 3217 30 1.2
Comparative example 4 76.5 68.1 3.85 102 4472 12 1.4
As can be seen from Table 1, the high-dimensional stability high-impact highlight polypropylene composite material prepared by the invention keeps higher surface gloss under the conditions of high dimensional stability and high impact strength, is beneficial to promoting the application of the polypropylene composite material in the highlight plastic product aspect to replace ABS and HIPS, and expands the application range of the polypropylene composite material.
Although the illustrative embodiments of the present application have been described above to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the embodiments, and various modifications within the spirit and scope of the present application defined and determined by the appended claims will be apparent to those skilled in the art from this disclosure.

Claims (20)

1. The polypropylene composite material is characterized by comprising the following components in percentage by mass:
10-50 wt.% of homopolymerized polypropylene, 5-45 wt.% of copolymerized polypropylene, 15-40 wt.% of filling material, 2-10 wt.% of toughening agent, 1-5 wt.% of compatilizer, 0.1-0.5 wt.% of antioxidant and 0.1-1 wt.% of other auxiliary agents.
2. The polypropylene composite material according to claim 1, wherein the molding shrinkage of the homo-polypropylene is 1 to 2%.
3. A polypropylene composite according to claim 1, wherein said co-polypropylene is a block co-polypropylene.
4. The polypropylene composite according to claim 1, wherein the filler is a particulate filler or a fibrous reinforcing material or a combination thereof.
5. The polypropylene composite of claim 1, wherein the toughening agent is an ethylene-octene copolymer or an ethylene-propylene copolymer or a mixture thereof.
6. The polypropylene composite of claim 1, wherein said compatibilizer is maleic anhydride grafted polypropylene or maleic anhydride grafted linear high density polyethylene.
7. The polypropylene composite according to claim 1, wherein the antioxidant is a mixture of two or three of primary antioxidant 1010 and secondary antioxidant 626 or secondary antioxidant 618.
8. The polypropylene composite of claim 1, wherein said other additives comprise lubricants, light stabilizers and toners.
9. The polypropylene composite material according to claim 3, wherein the block copolymer polypropylene has a molding shrinkage of 1-2% and a density of 0.89-0.91g/cm3。
10. The polypropylene composite of claim 4, wherein said particulate filler material is one of glass microspheres, calcium carbonate, and barium sulfate.
11. A polypropylene composite according to claim 4, wherein the fibrous reinforcement is one of glass fibres, PTFE fibres, aramid fibres and carbon fibres.
12. The polypropylene composite material as claimed in claim 6, wherein the mass ratio of the primary antioxidant to the secondary antioxidant is 1: 1-3.
13. The polypropylene composite according to claim 8, wherein the lubricant is one or a mixture of two of polypropylene wax, polyethylene wax, stearate and silicone.
14. The polypropylene composite material according to claim 10, wherein the particulate filler is glass microspheres, calcium carbonate and barium sulfate, and the particulate filler is non-porous spherical particles with a particle size of 1250-3250 meshes.
15. A polypropylene composite according to claim 11, wherein said fibres have a diameter of from 7 μm to 12 μm.
16. A process for the preparation of a polypropylene composite according to any one of claims 1 to 15, comprising the steps of:
weighing the following raw materials: weighing the homopolymerized polypropylene, the copolymerized polypropylene, the filling material, the toughening agent, the compatilizer, the antioxidant and other auxiliary agents according to the weight percentage;
mixing at medium speed: adding the prepared co-polypropylene, the toughening agent, the compatilizer and the antioxidant into a medium-speed mixer, and uniformly mixing to obtain a first mixture;
high-speed mixing: putting the mixture I into a high-speed mixer, and then continuously adding the prepared homopolymerized polypropylene and other auxiliary agents into the high-speed mixer to be uniformly mixed to obtain a mixture II;
cold mixing: putting the mixture II into a cold mixer for cold mixing to obtain a mixture III;
extruding: and conveying the mixture III to a main feeding hopper of a double-screw extruder through a spiral feeder, metering and adding the filling material through a lateral feeding port II, wherein the filling material is a fiber reinforced material, cooling the extruded material strips through a water tank, granulating through a granulator, drying through a dryer, and packaging to obtain a finished product.
17. The method for preparing a polypropylene composite according to claim 16, wherein in the high-speed mixing step, a part of the filler is added to the high-speed mixer and mixed, and the part of the filler is a granular filler.
18. A process for the preparation of a polypropylene composite according to claim 16 wherein during said extruding step a portion of said filler material is metered through a lateral feed port, said portion being in the form of particulate filler.
19. The method of claim 16, wherein the mixing and cooling are performed in steps of medium speed mixing, high speed mixing, and cold mixing.
20. The method for preparing polypropylene composite material as claimed in claim 16, wherein the rotation speed of the twin-screw extruder is 250-400rpm, and the extrusion temperature is set at 190-220 ℃.
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CN112708193A (en) * 2020-12-14 2021-04-27 武汉金发科技有限公司 Polypropylene composite material applied to water channel plate reinforcement and preparation method thereof
CN113278228A (en) * 2021-04-26 2021-08-20 宁波普立隆高分子材料有限公司 Polyolefin modified material for dish-washing machine ring strip and preparation method thereof
CN115572438A (en) * 2022-10-12 2023-01-06 江阴爱科森博顿聚合体有限公司 Low-shrinkage high-transparency polypropylene filling rope material and preparation method thereof
CN115947990A (en) * 2022-12-15 2023-04-11 会通新材料股份有限公司 Polypropylene reinforced material for household booster pump volute and preparation method thereof

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CN112194845A (en) * 2020-09-09 2021-01-08 武汉金发科技有限公司 Halogen flame-retardant reinforced polypropylene composite material and preparation method thereof
CN112708193A (en) * 2020-12-14 2021-04-27 武汉金发科技有限公司 Polypropylene composite material applied to water channel plate reinforcement and preparation method thereof
CN112708193B (en) * 2020-12-14 2023-02-17 武汉金发科技有限公司 Polypropylene composite material applied to waterway plate reinforcement and preparation method thereof
CN113278228A (en) * 2021-04-26 2021-08-20 宁波普立隆高分子材料有限公司 Polyolefin modified material for dish-washing machine ring strip and preparation method thereof
CN115572438A (en) * 2022-10-12 2023-01-06 江阴爱科森博顿聚合体有限公司 Low-shrinkage high-transparency polypropylene filling rope material and preparation method thereof
CN115947990A (en) * 2022-12-15 2023-04-11 会通新材料股份有限公司 Polypropylene reinforced material for household booster pump volute and preparation method thereof

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