CN112552590A - Talcum powder/glass fiber modified polypropylene composite material for gas-assisted molding and preparation method thereof - Google Patents
Talcum powder/glass fiber modified polypropylene composite material for gas-assisted molding and preparation method thereof Download PDFInfo
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- CN112552590A CN112552590A CN202011428933.2A CN202011428933A CN112552590A CN 112552590 A CN112552590 A CN 112552590A CN 202011428933 A CN202011428933 A CN 202011428933A CN 112552590 A CN112552590 A CN 112552590A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
Abstract
The invention discloses a talcum powder/glass fiber modified polypropylene composite material for an air-assisted molding process and a preparation method thereof, wherein the talcum powder/glass fiber modified polypropylene composite material for the air-assisted molding process is prepared from the following raw materials in percentage by weight. 40-90 parts of polypropylene resin, 20-30 parts of chopped glass fiber, 0-10 parts of talcum powder, 1-5 parts of compatilizer, 0.1-5 parts of antioxidant and 0.05-0.2 part of lubricant. The method is simple to operate, and the finished product is obtained by proportioning the polypropylene, the chopped glass fiber, the talcum powder, the compatilizer, the antioxidant and the lubricant according to a proper proportion and then extruding and granulating by adopting a double-screw extruder. The talcum powder/glass fiber modified polypropylene composite material prepared by the invention has good flowing property, high melt strength and excellent mechanical property, overcomes the defects that the traditional glass fiber reinforced polypropylene material part is easy to have surface floating fiber aggregation and easy to warp and deform, and can well meet the processing process requirement of the gas-assisted molding process.
Description
Technical Field
The invention relates to a glass fiber reinforced polypropylene composite material, in particular to a talcum powder/glass fiber modified polypropylene composite material for gas-assisted molding and a preparation method thereof.
Background
In recent years, with the improvement of injection molding technology and the requirement for special functionalization and light weight of products, more and more injection molding modes have appeared, wherein gas-assisted molding is one of the modes. The gas-assisted molding technology is characterized in that when materials are melted and filled into a mold cavity, high-pressure inert odor is injected, gas can push the material melt to fill the mold cavity, the interior of a product is hollowed out, and then the gas pressure is maintained, so that the interior of a plastic part forms a hollow structure. The gas-assisted molding can reduce the mold locking force, solve and eliminate the surface sink marks of the product for the product with large wall thickness change, save the usage amount of plastic raw materials by the hollow structure, save the cost and reduce the weight of the product. The technology is widely applied to the inner and outer decorations of a vehicle handle, a bumper and the like nowadays.
Most of the materials applied to gas-assisted molding are non-filled reinforced materials nowadays, for example, glass fiber reinforced polypropylene materials are rarely applied. The automobile handle is mostly formed by gas assistance, the appearance requirement of the product is strict, pure PP or other non-reinforced filling materials are mostly adopted, but the requirement of the product on the performance is higher and higher at present, and the market meets the requirement of gas assistance forming processing and also meets the material requirements on the appearance and the performance more and more. Compared with non-filled or non-reinforced filling modified materials, the glass fiber reinforced modified material has high mechanical property, but common surface appearance adverse conditions such as fiber floating and agglomeration easily occur in common glass fiber reinforced modified materials, the appearance is seriously influenced, and the application of the glass fiber reinforced modified material is limited.
Disclosure of Invention
Aiming at the processing characteristics of gas-assisted forming and the phenomenon of poor appearance of glass fiber reinforced materials, the invention aims to provide the talcum powder/glass fiber modified polypropylene composite material for gas-assisted forming and the preparation method thereof.
The invention also aims to provide a preparation method of the talcum powder/glass fiber modified polypropylene composite material for the gas-assisted forming process.
In order to achieve the technical purpose and achieve the technical effects, the technical scheme of the invention is implemented by the following technical scheme:
a talcum powder/glass fiber modified polypropylene composite material for an air-assisted molding process is composed of the following components in percentage by weight:
the modified polypropylene resin comprises the following components:
98-99.5% of pure polypropylene resin;
0.5-2% of black master batch.
The melt index of the polypropylene resin is 20-100g/10 min.
The glass fiber diameter of the chopped glass fiber is 10-13 μm.
The particle size of the talcum powder master batch is 10000 meshes.
The compatilizer is maleic anhydride grafted polypropylene, the effective grafting activity is more than 5%, and the melt index of the compatilizer is 5-20g/10 min.
The antioxidant auxiliary agent is compounded by one or more of main antioxidant hindered phenol and hindered amine, auxiliary antioxidant phosphite ester, thiodipropionate ester and thiol.
The lubricant is a silicone lubricant.
The preparation method of the talcum powder/glass fiber modified polypropylene composite material for the gas-assisted forming process comprises the following steps:
(1) weighing the modified polypropylene resin, the compatilizer, the antioxidant additive, the lubricant and the talcum powder master batch according to the weight percentage, adding the mixture into a high-speed mixer, and fully and uniformly mixing to obtain a mixed raw material A.
(2) And respectively placing the mixed raw material A and the chopped glass fibers in a main feeding port and a side feeding port of a double-screw extruder, and carrying out processing procedures such as melting, extruding, granulating, drying and the like to obtain the talcum powder/glass fiber modified polypropylene composite material for the gas-assisted molding process.
The technical scheme of the invention has the advantages that:
1: the glass fiber reinforced material prepared by the invention expands the application field of the traditional glass fiber reinforced polypropylene material. The material is applied to the gas-assisted forming process, the processed part has good apparent performance, the defects that the surface of the glass fiber reinforced material is easy to float and agglomerate are greatly improved, and the feasibility of gas-assisted forming is ensured by the stable and excellent fluidity and melt stability of the material.
2: the reinforced polypropylene material has a simple processing mode, and the conventional extrusion granulation equipment can meet the requirements. Compared with the traditional pure PP material applied to gas-assisted molding in a large scale, the material has higher mechanical property and better dimensional stability.
Detailed Description
The present invention is further described below with reference to specific examples and comparative examples, but the scope of the present invention is not limited thereto.
The raw materials used in the examples were as follows:
modified polypropylene resin: exxonmobil, melt index 20-100 g/min;
alkali-free chopped glass fiber: owens Kening;
talc powder: commercial, technical grade;
a compatilizer: commercial, technical grade;
antioxidant auxiliary agent: good easy compatilizer Jiangsu GmbH;
lubricant: commercial, technical grade;
example 1:
adding polypropylene resin, a compatilizer, an antioxidant aid, a lubricant and talc powder master batches into a high-speed mixer, fully and uniformly mixing, respectively placing the mixture and chopped glass fibers into a main feeding port and a side feeding port of a double-screw extruder, and carrying out processing procedures such as melting, extruding, granulating, drying and the like to obtain the talc powder/glass fiber modified composite material for the gas-assisted molding process. Wherein the filling parts of the talcum powder and the chopped glass fiber are 30 parts, and the filling parts of the talcum powder and the chopped glass fiber are 3 parts: 27 parts of (1);
example 2:
adding polypropylene resin, a compatilizer, an antioxidant aid, a lubricant and talc powder master batches into a high-speed mixer, fully and uniformly mixing, respectively placing the mixture and chopped glass fibers into a main feeding port and a side feeding port of a double-screw extruder, and carrying out processing procedures such as melting, extruding, granulating, drying and the like to obtain the talc powder/glass fiber modified polypropylene composite material for the gas-assisted molding process. Wherein the total filling parts of the talcum powder and the chopped glass fiber are 30 parts, and the filling parts of the talcum powder and the chopped glass fiber are 5 parts: 25 parts of (1);
example 3:
adding polypropylene resin, a compatilizer, an antioxidant aid, a lubricant and talc powder master batches into a high-speed mixer, fully and uniformly mixing, respectively placing the mixture and chopped glass fibers into a main feeding port and a side feeding port of a double-screw extruder, and carrying out processing procedures such as melting, extruding, granulating, drying and the like to obtain the talc powder/glass fiber propylene composite material for the gas-assisted molding process. Wherein the total filling parts of the talcum powder and the chopped glass fiber are 30 parts, and the filling parts of the talcum powder and the chopped glass fiber are 10 parts: 20 parts of (1);
comparative example 1:
adding the polypropylene resin, the compatilizer, the antioxidant assistant and the lubricant into a high-speed mixer, fully and uniformly mixing, and carrying out processing procedures such as melting, extruding, granulating, drying and the like to obtain the modified polypropylene. Talc powder or chopped glass fiber is not added.
Comparative example 2:
adding the polypropylene resin, the compatilizer, the antioxidant assistant, the lubricant and the talcum powder master batch into a high-speed mixer, fully and uniformly mixing, and carrying out processing procedures such as melting, extruding, granulating, drying and the like to obtain the talcum powder filled modified polypropylene material. Wherein the total filling part of the talcum powder is 30 parts, and the chopped glass fiber is not added.
Comparative example 3:
adding the polypropylene resin, the compatilizer, the antioxidant aid, the lubricant and the chopped flat glass fibers into a high-speed mixer, fully and uniformly mixing, and carrying out processing procedures such as melting, extruding, granulating, drying and the like to obtain the glass fiber reinforced modified polypropylene material. Wherein the chopped glass fiber is filled in 30 parts in total without adding talcum powder.
The particles prepared in the above examples and comparative examples were subjected to the performance and part appearance tests, the test items and test methods were as follows:
tensile property: the drawing speed was 5mm/min according to ISO 527.
Bending property: the test speed is 2mm/min according to ISO 178.
Notched impact strength: the test is carried out according to the method of ISO 179 at the normal temperature of 23 ℃ and the temperature of-40 ℃ respectively.
And (3) material appearance evaluation: and (3) performing gas-assisted molding and injection molding to obtain the door handle part, and observing the appearance.
The properties of the talc powder/glass fiber polypropylene composite material obtained by the gas-assisted forming process in each of the above examples and comparative examples are shown in the following table:
through the data of the comparative example and the example, the general glass fiber reinforced PP material has more excellent overall performance than the talcum powder filled polypropylene material, but when the glass fiber reinforced PP material is applied to gas-assisted injection molding, poor appearance or surface collapse is easy to occur, and the product quality is difficult to ensure. The talcum powder and the glass fiber are mixed in a proper proportion, the prepared modified polypropylene material has higher mechanical property compared with pure polypropylene or mineral powder filled modified polypropylene, and the prepared product has better apparent effect compared with pure glass fiber reinforced modified polypropylene, overcomes the defect of fiber floating or agglomeration easily caused by the traditional glass fiber modified material, greatly improves the defect that the glass fiber reinforced product is easy to warp and deform due to the addition of the talcum powder, and ensures that the size stability of the product is better. Meanwhile, the adding proportion of the talcum powder and the chopped glass fiber needs to pay attention, when more talcum powder is added, the mechanical property of the material is greatly reduced, and when more chopped glass fiber is added, the apparent property of the material is difficult to control, and the processing of gas-assisted molding is difficult.
The talcum powder/glass fiber polypropylene material obtained by the invention has good apparent property and excellent mechanical property, can be well used for a gas-assisted molding process, and widens the material selection of gas-assisted processing molding.
It should be noted that the embodiments of the present invention are only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to make the innovative points and contents of the present invention obvious to those skilled in the art. Equivalent changes and modifications of the described structures, features and principles of the invention are intended to be included within the scope of the present patent application.
Claims (8)
1. A talcum powder/glass fiber modified polypropylene composite material for gas-assisted molding process is characterized in that: the weight percentage of the material is as follows:
the modified polypropylene resin comprises the following components:
98-99.5% of pure polypropylene resin;
0.5-2% of black master batch.
2. The talcum powder/glass fiber modified polypropylene composite material for gas-assisted forming process according to claim 1, which is characterized in that: the melt index of the polypropylene resin is 20-100g/10 min.
3. The talcum powder/glass fiber modified polypropylene composite material for gas-assisted forming process according to claim 1, which is characterized in that: the glass fiber diameter of the chopped glass fiber is 10-13 μm.
4. The talcum powder/glass fiber modified polypropylene composite material for gas-assisted forming process according to claim 1, which is characterized in that: the particle size of the talcum powder master batch is 10000 meshes.
5. The talcum powder/glass fiber modified polypropylene composite material for gas-assisted forming process according to claim 1, which is characterized in that: the compatilizer is maleic anhydride grafted polypropylene, the effective grafting activity is more than 5%, and the melt index of the compatilizer is 5-20g/10 min.
6. The talcum powder/glass fiber modified polypropylene composite material for gas-assisted forming process according to claim 1, which is characterized in that: the antioxidant auxiliary agent is compounded by one or more of main antioxidant hindered phenol and hindered amine, auxiliary antioxidant phosphite ester, thiodipropionate ester and thiol.
7. The talcum powder/glass fiber modified polypropylene composite material for gas-assisted forming process according to claim 1, which is characterized in that: the lubricant is a silicone lubricant.
8. The preparation method of the talcum powder/glass fiber modified polypropylene composite material for gas-assisted forming process according to any one of claims 1-7, which is characterized in that: the method comprises the following steps:
(1) weighing the modified polypropylene resin, the compatilizer, the antioxidant auxiliary agent, the lubricant and the talcum powder master batch according to the weight percentage, adding the modified polypropylene resin, the compatilizer, the antioxidant auxiliary agent, the lubricant and the talcum powder master batch into a high-speed mixer, and fully and uniformly mixing to obtain a mixed raw material A;
(2) and respectively placing the mixed raw material A and the chopped glass fibers in a main feeding port and a side feeding port of a double-screw extruder, and carrying out processing procedures such as melting, extruding, granulating, drying and the like to obtain the talcum powder/glass fiber modified polypropylene composite material for the gas-assisted molding process.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111117062A (en) * | 2019-12-12 | 2020-05-08 | 上海普利特复合材料股份有限公司 | Long glass fiber reinforced polypropylene composite material for automobile front-end module and preparation method thereof |
| CN114213686A (en) * | 2021-12-27 | 2022-03-22 | 常州威材新材料科技有限公司 | Low-warpage glass fiber reinforced polypropylene composite material and preparation method thereof |
| CN114685891A (en) * | 2022-03-29 | 2022-07-01 | 金发科技股份有限公司 | PP/POE composition for gas-assisted molding and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111117062A (en) * | 2019-12-12 | 2020-05-08 | 上海普利特复合材料股份有限公司 | Long glass fiber reinforced polypropylene composite material for automobile front-end module and preparation method thereof |
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| CN114213686B (en) * | 2021-12-27 | 2023-10-13 | 常州威材新材料科技有限公司 | Low-warpage glass fiber reinforced polypropylene composite material and preparation method thereof |
| CN114685891A (en) * | 2022-03-29 | 2022-07-01 | 金发科技股份有限公司 | PP/POE composition for gas-assisted molding and preparation method and application thereof |
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