CN111073138B - Light-permeable polypropylene composition with good wear resistance and preparation method thereof - Google Patents
Light-permeable polypropylene composition with good wear resistance 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
- C08L23/12—Polypropene
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- 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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- 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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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- 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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Abstract
The invention relates to a light-permeable polypropylene composition with good wear resistance and a preparation method thereof. The invention ensures the performance of the composition material by filling the glass beads, and has superior light transmittance compared with other fillers; the polypropylene product has good mechanical property, good welding property, flat and smooth appearance and excellent wear resistance, and can be used for laser welding exterior products.
Description
Technical Field
The invention belongs to the field of thermoplastic plastics, and particularly relates to a light-permeable polypropylene composition with good wear resistance and a preparation method thereof.
Background
Thermoplastic welding technologies include methods such as friction vibration welding, hot plate welding and ultrasonic welding, wherein the friction vibration welding can weld parts with larger sizes, but cannot weld structural parts with complex interface shapes, and has poorer welding precision; the hot plate welding application range is narrow, and plastics with high crystallization speed cannot be welded due to the welding process; ultrasonic welding has fast, and the automatic advantage of easy experiment can weld products such as domestic appliance shell, electron, but this technical cost is higher, has restricted its development. Laser welding can generate accurate, firm and sealed welding seam, and it adopts non-contact's mode, can prevent to cause the pollution to the product to greatly reduced because the internal stress that vibrations and heating produced among the welding process, make the inside structure of product more perfect, effectively improved the ability of the ageing resistance of product.
Laser welding requires that the peripheral parts have certain light transmission properties, while the bumper body has light absorption properties, so that the laser can penetrate through the parts to reach the bumper body to generate energy to melt and then connect the two contacted interfaces. Patent 106750969A teaches a long glass fiber material with dimensional stability and high welding strength, which has good mechanical properties, but due to the glass fiber material itself, it can only be used widely in the field of automotive functional parts, but has less application in interior and exterior parts. Patent CN107652653A discloses an interior and exterior material with high light transmittance and good weather resistance by adding special black toner to change its function, but certain inconvenience is caused to the subsequent color matching of the material after adding the black toner.
Disclosure of Invention
The invention aims to solve the technical problem of providing a polypropylene composition with light permeability and good wear resistance and a preparation method thereof.
The invention provides a light-permeable polypropylene composition with good wear resistance, which comprises the following components in parts by weight:
62-87 parts of polypropylene resin;
8-25 parts of glass beads;
2-4 parts of a compatilizer;
2-8 parts of a toughening agent;
0.2-0.5 part of antioxidant;
0.3-0.5 part of weather resistant agent;
0.1-0.2 part of anti-reflection agent.
The polypropylene resin is random copolymerization polypropylene or homopolymerization polypropylene, and the density range is 0.890-0.910g/cm 3 The melt mass flow rate is 2-30g/10min at 230 ℃ under a load of 2.16 Kg.
The glass beads are one or two of hollow glass beads and solid glass beads. Compared with other filling systems, the transparency of the material can be obviously improved by adding the glass beads, and the characteristics of the glass beads are beneficial to improving the wear resistance and scratch resistance of the material.
The compatilizer is maleic anhydride grafted polypropylene compatilizer with the density of 0.88-0.91g/cm 3 The melt mass flow rate is 6-15g/10min at 230 ℃ under a load of 0.325 Kg.
The toughening agent is POE toughening agent with the density of 0.860-0.898 g/cm 3 The melt mass flow rate is 0.5-13 g/10min at 190 ℃ under a load of 2.16 Kg.
The antioxidant is at least one of phenols, phosphites and hindered phenols.
The weather resisting agent is a hindered amine light stabilizer.
The anti-reflection agent is a sorbitol polypropylene transparent nucleating agent.
The invention also provides a preparation method of the polypropylene composition with light permeability and good wear resistance, which comprises the following steps:
the polypropylene resin, the compatilizer, the flexibilizer, the antioxidant, the anti-reflection agent and the weather-resistant agent are put into a high-speed stirrer to be uniformly mixed and then added into a double-screw extruder, the glass beads are added in a side feeding mode, and the mixture is melted, mixed and extruded for granulation to obtain the light-permeable polypropylene composition with good wear resistance.
The melting and mixing temperature is 180-220 ℃, and the screw rotating speed is 450-500 r/m.
Advantageous effects
According to the invention, the glass beads are adopted to replace the traditional talcum powder system, the tensile strength and the bending strength of the material are improved by 10-13%, the impact strength is equal to that of the previous material, and the material can be replaced in the aspect of mechanical property; the material filled with the glass beads has excellent light transmittance within the wavelength range of 900-1100nm, and the shearing force after finish welding is improved by 50% compared with that of the traditional talcum powder filled material; the polypropylene product disclosed by the invention has good mechanical properties, is flat and smooth in appearance and excellent in wear resistance, does not need to be added with other scratch-resistant agents, and can be used as a part of an automobile needing laser welding.
Drawings
FIG. 1 is a graph of light transmittance data for example and comparative polypropylene compositions.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention can be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the claims appended to the present application.
The raw materials used in the examples and comparative experiments are, but not limited to, the following:
polypropylene resin: PP Z30S Zhenhai, purchased from Zhenhai petrochemical, with a density of 0.895g/cm 3 The melt mass flow rate was 25g/10min at 230 ℃ under a load of 2.16 Kg.
Hollow glass beads: k25, available from 3M company, density 0.25g/cm 3 Particle size 55 μm.
Solid glass beads: 050-20-215, available from SOVITEC, density 2.46g/cm 3 The particle size was 20 μm.
A compatilizer: BONDYRAM 1001CN available from Polyron and having a density of 0.88g/cm 3 The melt mass flow rate was 10g/10min at 230 ℃ under a load of 0.325 Kg.
P, a toughening agent: POE ENGAGE 7467 available from DOW and having a density of 0.898g/cm 3 The melt mass flow rate was 1.2g/10min at 190 ℃ under a load of 2.16 Kg.
Antioxidant 1010: purchased from basf.
Antioxidant 168: purchased from basf.
Light stabilizer UV-3808PP5: purchased from cyanite.
An anti-reflection agent: millad3988, purchased from Milliken.
Each performance evaluation method:
(1) And (3) testing light transmittance: testing the light transmittance in the waveband range of 900-1300nm by adopting a near infrared instrument of ocean optics;
(2) And (3) testing mechanical properties: after injection molding, the samples were tested for tensile strength, flexural modulus and notched impact strength after conditioning the ISO mechanical specimens in a standard environment (23 ℃,50% relative humidity) for 24 h.
Tensile strength is performed according to ISO 527 standard, flexural modulus is performed according to ISO 178 standard, and notched impact strength is performed according to ISO 180 standard.
(3) Welding shearing force: injection molded into 2mm vertical burning bars, which were then laser welded together and tested for maximum force by tensile testing.
(4) And (3) wear resistance test: referring to the 5.8 standard in Jili Q/JLY J7110281D-2016, load 5N, stroke 100mm, friction frequency 30 times/min, friction material canvas, friction 2000 times, and then the grade evaluation of the rubbed material.
| Number of stages | Surface state of |
| 5 | Invisible surface wear |
| 4 | Invisibly visible surface wear |
| 3 | Slight visible surface abrasion |
| 2 | Visible surface wear |
| 1 | Severe surface wear |
Table 1: polypropylene composition examples and comparative examples (parts by weight) which are light-permeable and have good abrasion resistance
Table 2: performance test results of the polypropylene compositions of examples and comparative examples
In the above table, a conventional PP + EPDM-TD20 system, talc powder as filler, POE as toughening agent are used as comparative example 1, and the rest of the formula is a system added with glass beads. Compared with the comparative example 1 and the example 1, the light transmittance of the material is obviously improved after the talc powder is simply replaced by the glass beads, and is improved from 47.8% to 52% at the wavelength of 1100nm, because the glass beads have the effect of improving the light transmittance, but the performance of the material is reduced because no compatilizer is added.
Therefore, by adding the compatilizer into the examples 2 and 3, the mechanical property of the material is improved to a level close to that of the comparative example, but the corresponding light transmittance and welding performance are improved to about 490N from the original 455N, the light transmittance is also improved to 55 percent and 58 percent, the wear-resisting grade is improved to 4, and the effect of the hollow glass bead K25 is better than that of the solid glass bead 050-20-215 in terms of welding strength and light transmittance.
The method of using the solid glass beads and the hollow glass beads in a matched manner is adopted, and as shown in examples 4-7, when the ratio of the hollow glass beads to the solid glass beads is 15. The hollow glass beads and the solid glass beads are mutually matched, so that the light transmittance of the material is improved. The addition of the transparent nucleating agent Millad3988 changes the crystallization type of the material, so that light rays can pass through the material more easily, and in addition, the addition of the nucleating agent improves the crystallization performance of the material, so that the rigidity of the material is improved, the impact is reduced, but the light transmittance and the welding strength are improved on the basis of the embodiment 6. The nucleating agent can improve the surface crystallinity, thereby improving the surface hardness and the wear resistance grade.
The invention can be suitable for the peripheral parts of the bumper in the aspect of automobile exterior decoration, and is integrated with the bumper material by a laser welding method, so that the wear resistance and the scratch resistance of the material are improved to a greater extent, other scratch-resistant reagents are not required to be added, and the cost of the material is reduced.
Claims (6)
1. A polypropylene composition which can transmit light and has good wear resistance is characterized in that: the coating comprises the following components in parts by weight:
62-87 parts of polypropylene resin;
8-25 parts of glass beads;
2-4 parts of a compatilizer;
2-8 parts of a toughening agent;
0.2-0.5 part of antioxidant;
0.3-0.5 part of weather resistant agent;
0.1-0.2 part of anti-reflection agent; the glass beads are hollow glass beads and solid glass beads, the particle size of the hollow glass beads is 55 microns, the particle size of the solid glass beads is 20 microns, and the mass ratio of the hollow glass beads to the solid glass beads is 5; the compatilizer is maleic anhydride grafted polypropylene compatilizer with the density of 0.88-0.91g/cm 3 The melt mass flow rate is 6-15g/10min at 230 ℃ and 0.325Kg load; the toughening agent is POE toughening agent with the density of 0.860-0.898 g/cm 3 The melt mass flow rate is 0.5-13 g/10min at 190 ℃ under 2.16Kg load; the anti-reflection agent is a sorbitol polypropylene transparent nucleating agent.
2. The polypropylene composition according to claim 1, wherein: the polypropylene resin is random copolymer polypropylene or homopolymerized polypropylene, and the density range is 0.890-0.910g/cm 3 The melt mass flow rate is 2-30g/10min at 230 ℃ under a load of 2.16 Kg.
3. The polypropylene composition according to claim 1, wherein: the antioxidant is at least one of phenols, phosphites and hindered phenols.
4. The polypropylene composition according to claim 1, wherein: the weather resisting agent is a hindered amine light stabilizer.
5. A process for preparing the light-permeable polypropylene composition with good abrasion resistance of claim 1, comprising the steps of:
putting the polypropylene resin, the compatilizer, the flexibilizer, the antioxidant, the anti-reflection agent and the weather-resistant agent into a high-speed stirrer, uniformly mixing, adding into a double-screw extruder, adding the glass beads in a side feeding manner, melting, mixing, extruding and granulating to obtain the light-permeable polypropylene composition with good wear resistance.
6. The method of claim 5, wherein: the melting and mixing temperature is 180-220 ℃, and the screw rotating speed is 450-500 r/m.
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| CN112126152B (en) * | 2020-08-06 | 2023-09-05 | 上海日之升科技有限公司 | Polypropylene composite material with low-light diffusion effect and preparation method thereof |
| CN113717465A (en) * | 2021-08-19 | 2021-11-30 | 金旸（厦门）新材料科技有限公司 | Low-dielectric-constant high-weather-resistance polypropylene composite material and preparation method thereof |
| CN113980385B (en) * | 2021-10-28 | 2023-02-17 | 金发科技股份有限公司 | Matte and scratch-resistant polypropylene composition and preparation method and application thereof |
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| CN107652653A (en) * | 2017-10-25 | 2018-02-02 | 延锋彼欧汽车外饰***有限公司 | It is a kind of can laser welding modified plastics and preparation method thereof |
| CN110511485A (en) * | 2019-08-31 | 2019-11-29 | 山东寿光健元春化工有限公司 | A kind of toughening high-transparency antibacterial PP composite material and preparation method thereof |
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Patent Citations (6)
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| CN1842409A (en) * | 2003-08-27 | 2006-10-04 | 东方化学工业株式会社 | Laser light transmitting resin composition and method for laser welding using the same |
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| CN105968566A (en) * | 2016-05-31 | 2016-09-28 | 广东顺德华焯机械科技有限公司 | Preparation method of absorbent for laser transmission welding of light-transmitting plastic |
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