CN117820764A - Spray-free filling polypropylene material composition with spreading effect and preparation method and application thereof - Google Patents
Spray-free filling polypropylene material composition with spreading effect and preparation method and application thereof Download PDFInfo
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 67
- -1 polypropylene Polymers 0.000 title claims abstract description 50
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 50
- 239000000203 mixture Substances 0.000 title claims abstract description 43
- 239000000463 material Substances 0.000 title claims abstract description 38
- 230000000694 effects Effects 0.000 title claims abstract description 36
- 238000011049 filling Methods 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 230000007480 spreading Effects 0.000 title description 8
- 238000003892 spreading Methods 0.000 title description 8
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 32
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 16
- 239000000314 lubricant Substances 0.000 claims abstract description 14
- 239000012745 toughening agent Substances 0.000 claims abstract description 14
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims description 20
- 238000001746 injection moulding Methods 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 4
- 238000011282 treatment Methods 0.000 claims description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 3
- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 claims description 2
- 229940063655 aluminum stearate Drugs 0.000 claims description 2
- AGXUVMPSUKZYDT-UHFFFAOYSA-L barium(2+);octadecanoate Chemical compound [Ba+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O AGXUVMPSUKZYDT-UHFFFAOYSA-L 0.000 claims description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 2
- 239000008116 calcium stearate Substances 0.000 claims description 2
- 235000013539 calcium stearate Nutrition 0.000 claims description 2
- 229920001903 high density polyethylene Polymers 0.000 claims description 2
- 239000004700 high-density polyethylene Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 15
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- 229920007019 PC/ABS Polymers 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 1
- 241001085205 Prenanthella exigua Species 0.000 description 1
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
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- 239000006229 carbon black Substances 0.000 description 1
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- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical group [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
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- 238000004043 dyeing Methods 0.000 description 1
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- 239000003973 paint Substances 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a spray-free filling polypropylene material composition with a dot scattering effect, and a preparation method and application thereof. The composition comprises the following raw materials in percentage by mass: 60-85% of polypropylene resin; 10-30% of sprinkling master batch; 5-30% of talcum powder; 2-6% of toughening agent; black master batch 0.3-1%; 0.2 to 1 percent of antioxidant; 0.05-2% of lubricant; 0.005-0.5% of toner. The invention can realize obvious black matrix and white scattering point surface effect in polypropylene filled with higher talcum powder, can display a flickering effect at a specific angle, can keep good mechanical property, can control the number of scattering points by adjusting the proportion of scattering point master batches, and has the advantages of attractive appearance, lower production cost and high mass production magnification. The prepared polypropylene material composition can be applied to the fields of automobile interior and exterior trim, household appliance shells and the like with strict requirements on appearance and performance.
Description
Technical Field
The invention relates to the field of spraying-free plastics, in particular to a spraying-free filling polypropylene material composition with a spreading effect and a preparation method thereof.
Background
In recent years, the spreading effect is touted by consumers and end consumer products due to the unique and attractive appearance effect, and a spraying process is often adopted for producing splash-ink, random and different-size effects. The polypropylene has low surface energy, complex surface treatments are combined before painting, and the painting is usually required more than four times in order to achieve the spreading effect. The spraying process is complex, the time consumption is long, the cost is high, the environmental pollution is large, the reject ratio is high, and the paint surface is easy to damage and fall off. The spraying-free plastic has the advantages of short production period, low comprehensive cost, environmental friendliness and the like due to one-step molding, and the spraying technology is continuously replaced in a plurality of fields.
The polypropylene has low price and good comprehensive performance, is widely applied to the fields of automobiles, electronic appliances and the like at present, but the polypropylene generally needs to be filled and modified in practical application due to the defects of large shrinkage, poor rigidity and the like, and has the advantages of reducing the shrinkage, improving the rigidity, heat resistance, creep resistance, prolonging the service life of products and the like while reducing the cost.
However, the filling polypropylene has great influence on the dyeing property of the material due to the fillers such as talcum powder, so that the material cannot realize a lower L value, the application of the material to automobile exterior trim is greatly limited, and the filler and the toner can cover a large amount of scattering points, so that the scattering point effect is not obvious. Secondly, because the scattering point material is not resistant to shearing, the original size and shape of the scattering point are maintained in the extrusion production process, and the scattering point material is contrary to the good dispersion of polypropylene fillers, auxiliaries and the like in the material, thereby realizing better performance. Therefore, a spraying-free filling polypropylene material composition with good mechanical property and obvious scattering point appearance effect is developed, and the spraying-free filling polypropylene material composition has good economic value and application prospect.
Chinese patent CN116253980a discloses a spraying-free sprinkling effect consumption recycling halogen-free flame retardant PC/ABS material and a preparation method thereof, wherein direct extrusion granulation can lead to reduced sprinkling particle size, insignificant visual sprinkling effect or reduced material performance due to poor dispersion of auxiliary agent; chinese patent CN110325338B discloses a polypropylene resin composition, which is a metal effect of color flop added with small particle size aluminum powder, and a process of direct cold mixing, without obvious scattering effect, and a molded article obtained by injection molding the polypropylene resin composition.
Disclosure of Invention
The invention provides a spray-free filling polypropylene material composition with a spreading effect, and a preparation method and application thereof. Solves the contradiction between the large-grain-diameter scattering effect and the good mechanical property of the filled polypropylene, provides the filled polypropylene material composition with obvious and random black-matrix white scattering-point spraying-free effect and excellent mechanical property, and overcomes the application limitation of the prior art.
Another object of the present invention is to provide a method for preparing the spray-free filled polypropylene material composition with a scattering effect.
The invention also aims to provide the application of the spray-free filling polypropylene material composition with the scattering effect in automobile interior and exterior trim, household appliances and consumer product spray-free products.
The technical scheme of the invention is as follows:
the spray-free filling polypropylene material composition with the dot scattering effect comprises the following raw materials in percentage by mass:
50% -90% of base material; sprinkling master batches: 10% -50%;
the base material comprises the following raw materials in percentage by mass: 60-85% of polypropylene resin; 5-30% of talcum powder; 2-6% of toughening agent; black master batch 0.3-1%; 0.2 to 1 percent of antioxidant; 0.05-2% of lubricant; 0.005% -0.5% of toner;
the sprinkling master batch comprises the following raw materials in percentage by mass: 60-80% of polypropylene resin; 2% -15% of flash sheet; 5-20% of talcum powder; 2-6% of toughening agent; black master batch 0.3-0.7%; 0.2 to 1 percent of antioxidant; the method comprises the steps of carrying out a first treatment on the surface of the 0.05 to 2 percent of lubricant.
Preferably, the polypropylene resin is at least one of homo-polypropylene and co-polypropylene, and the melt index at 230 ℃ and 2.16kg is 10-30 g/10min.
Preferably, the mesh number of the talcum powder is between 2000 and 6000.
Preferably, the toughening agent is at least one of ethylene-octene copolymer, ethylene-butene copolymer and high-density polyethylene.
Preferably, the black master batch is at least one of high-concentration carbon black colorants 6269, 6621.
Preferably, the antioxidant is at least one of hindered phenol antioxidants, phosphite antioxidants and thioether antioxidants; more preferably, the antioxidant 1010 and the antioxidant 168 are compounded (the mass ratio is 2:1-1:1).
Preferably, the lubricant is at least one of zinc stearate, calcium stearate, aluminum stearate, barium stearate, polyethylene wax and monoglyceride stearate.
Preferably, the toner is phthalocyanine blue or magenta.
Preferably, the flash flakes in the scattered master batch are at least one of aluminum flakes, glitter powder, pearl powder and potassium feldspar chips.
Further preferably, the flash sheet is an aluminum sheet, and the diameter of the flash sheet is at least two of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm and 1.2mm, so as to realize the appearance effect of the irregular splash-ink scattering points, and the flash sheet is at least one of a circle, a hexagon and a quadrilateral. The reflection of light by the aluminum flakes can make the scattering effect more pronounced on filled polypropylene surfaces with lower gloss.
The flash sheet content is not too much or too little, and when the flash sheet content is too much, the impact resistance of the material is obviously reduced; when the content is too small, the powder is covered by talcum powder and toner in a large quantity, and the scattering effect is not obvious.
The invention also provides a preparation method of the spray-free filling polypropylene material composition with the dot scattering effect, which comprises the following steps:
s1, preparing a matrix PP: firstly, mixing talcum powder, toner and black master batch, then adding PP resin, a toughening agent, an antioxidant and a lubricant, stirring and mixing, extruding the mixture through a double-screw extruder, and granulating to obtain a matrix PP;
s2, preparing sprinkling master batches: stirring and mixing the flash sheet and the talcum powder, then feeding the mixture through a side feeding port, stirring and mixing the PP resin, the toughening agent, the antioxidant, the lubricant and the black master batch, extruding the mixture through a double-screw extruder, and granulating to obtain the sprinkling master batch;
s3, injection molding: blending the matrix PP and the scattering point master batch, and performing injection molding; wherein the injection molding temperature is 200-230 ℃ and the injection molding pressure is 55-70 MPa.
In the step S1, materials can keep good dimensional stability and performance through extrusion granulation after the screw combination with strong shearing is fully mixed.
Preferably, in step S2, the angle of the shear block of the twin-screw extruder is less than 45 °, the thickness is less than 1D, and the number is less than 5 when preparing the sprinkling master batch. According to the invention, the sprinkling master batch is prepared by combining the double-screw extruder and the screws with lower shearing, so that the form and the size of sprinkling in the extrusion granulation process are kept better.
The invention also provides application of the spray-free filling polypropylene material composition with the scattering effect in automobile interior and exterior trim, household appliances and consumer goods spray-free products.
The beneficial effects of the invention are as follows: compared with the prior art, the invention can realize obvious black matrix white scattering dot surface effect in polypropylene filled with higher talcum powder, can show flickering effect at a specific angle, keeps the shape and size of scattering dots intact, can keep good mechanical property of the material, can control the number of scattering dots by adjusting the proportion of scattering dot master batches, and has the advantages of beautiful appearance, lower production cost, high mass production magnification and the like. The prepared polypropylene material composition can be directly injection molded, so that the processing cost is greatly reduced, the polypropylene material composition has the advantages of environmental protection, difficult spalling and the like, is applied to the fields of automobile interior and exterior trim, household appliance shells and the like with strict requirements on appearance and performance, and has good economic value and application prospect.
Drawings
In FIG. 1, scheme II shows the appearance of the polypropylene material prepared in example 1, scheme I shows the appearance of the polypropylene material prepared in comparative example 1, and scheme 3 shows the appearance of the polypropylene material prepared in example 4.
Detailed Description
The present invention will be described in detail with reference to examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that it will be apparent to those skilled in the art that several modifications and improvements can be made without departing from the spirit of the invention, which are all within the scope of the invention.
The starting materials used in the examples, unless otherwise specified, were all obtained from conventional routes and are specified in Table 1 below:
TABLE 1
| Raw materials | Manufacturer' s | Number plate |
| Polypropylene | Yanshan petrochemical industry | K9829H |
| Toughening agent | Baofeng for baby | HD-6081 |
| Talc powder | Ai Hai | 51205L |
| Lubricant | Hair base | Zinc stearate ZS-TW |
| Antioxidant | Li Anlong | 1010 |
| Black master batch | Kabote | UN6269 |
| Toner powder | Kelaien | Pink-E01、908P |
| Aluminum sheet | Rong Cai | 810H04A、810H03A、810H025A、810H015A |
| Potassium feldspar | Rong Cai | 8215 |
| Bright white drill | Fubo | Supearl D109L |
Unless otherwise indicated, the reagents, methods and apparatus employed in the present invention are those conventional in the art
Examples 1-5 and comparative examples 1-4, respectively, provide a spray-free polypropylene material or composition, wherein the component mass (kg) is shown in Table 2.
TABLE 2
The components of the sprinkling mother particle are as follows: 74% of polypropylene resin; aluminum flakes total 10% (0.4 mm:0.6mm:0.8mm:1.0mm weight ratio = 1:1:1:1); 11% of talcum powder; 4% of a toughening agent; black master batch 0.5%; 0.6% of antioxidant; the method comprises the steps of carrying out a first treatment on the surface of the 0.2% of lubricant.
The preparation methods of examples 1 to 3 are as follows:
s1, preparing a matrix PP: firstly, mixing talcum powder, toner and black master batch, then adding PP resin and auxiliary agent, stirring and mixing, extruding the mixture through a double screw extruder, and granulating to obtain matrix PP;
s2, preparing sprinkling master batches: stirring and mixing the flash sheet and the talcum powder, then feeding the mixture through a side feeding port, stirring and mixing the PP resin, the auxiliary agent and the black master batch, extruding the mixture through a double-screw extruder, and granulating to obtain the sprinkling master batch;
s3, injection molding: blending the matrix PP and the scattering point master batch, and performing injection molding; wherein the injection molding temperature is 200-230 ℃ and the injection molding pressure is 55-70 MPa.
Wherein, the angle of the shearing block of the double-screw extruder is 45 degrees, the thickness is 1D, and the number is 5 when the sprinkling master batch is prepared.
The preparation methods of comparative examples 1 to 5 are as follows:
and (3) mixing special toner such as talcum powder, toner, aluminum sheet or potassium feldspar and the like with black master batch, adding PP resin and auxiliary agent, stirring and mixing, extruding the mixture through a double-screw extruder, and granulating to obtain the spraying-free polypropylene material.
Wherein, the aluminum sheets in comparative example 1 and comparative example 2 were hexagonal aluminum sheets having a diameter of 1.0 mm. The aluminum sheet in comparative example 4 was 0.4mm:0.6mm:0.8mm:1.0mm weight ratio = 1:1:1:1
The preparation method of comparative example 6 is as follows:
mixing talcum powder, toner, aluminum sheet (0.4 mm:0.6mm:0.8mm:1.0mm weight ratio = 1:1:1) and black master batch, adding PP resin and auxiliary agent, stirring, mixing, extruding the mixture through a single screw extruder after an internal mixer, and granulating to obtain the spraying-free polypropylene material.
The spraying-free polypropylene compositions prepared in the above examples and comparative examples were subjected to performance testing by the following specific methods:
tensile strength: according to ISO527 test standard, test conditions are 50mm/min,23 DEG C
Bending properties: according to ISO178 test standard, test conditions are 2mm/min,23 DEG C
Notched Izod impact Strength: according to ISO180 test standard, the test condition is 23 DEG C
Color difference value: color testing with color difference meter, wherein the lower the L value is, the darker the color is
Appearance effect: injection molding the spraying-free polypropylene composition into a fine skin color plate with the diameter of 90 multiplied by 55 multiplied by 3mm, observing under D65 lamplight, and respectively grading the size, the number and the obvious degree of scattering points, wherein the optimal degree is 5, and the worst degree is 1; the grade 5 is large in scattering points and multiple in scattering points or has obvious scattering point effect visually; the level 1 is almost invisible or too small.
The test results of examples 1 to 3 are shown in Table 3.
TABLE 3 Table 3
| Example 1 | Example 2 | Example 3 | |
| Tensile Strength (MPa) | 18 | 16 | 14 |
| Flexural Strength (MPa) | 26 | 23 | 20 |
| Flexural modulus (MPa) | 1900 | 1700 | 1500 |
| Notched impact Strength (KJ/m) 2 ) | 32 | 22 | 17 |
| Spreading point size | 4 | 4.5 | 5 |
| Multiple scattering points | 4 | 4.5 | 5 |
| Degree of apparent scattering | 4 | 4.5 | 5 |
The test results of comparative examples 1 to 6 are shown in Table 4.
TABLE 4 Table 4
| Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 | |
| Tensile Strength (MPa) | 16 | 17 | 17 | 16 | 21 | 15 |
| Flexural Strength (MPa) | 24 | 25 | 25 | 24 | 23 | 25 |
| Flexural modulus (MPa) | 2200 | 2100 | 1600 | 1500 | 1100 | 1600 |
| Notched impact Strength (KJ/m) 2 ) | 31 | 33 | 40 | 22 | 45 | 23 |
| Spreading point size | 3 | 3 | 2 | 0.5 | 2 | 2 |
| Multiple scattering points | 3.5 | 3 | 2.5 | 0.5 | 2.5 | 2.5 |
| Degree of apparent scattering | 3.5 | 3 | 1.5 | 0.5 | 2.5 | 2 |
According to the test results of table 3, the spraying-free polypropylene composition of each embodiment of the invention can realize better spraying-free scattering effect, the scattering point size, the scattering point number and the scattering point obvious degree grade are all above 3 grades, and some embodiments can reach 5 grades, have very dense and obvious scattering point effect, but have obvious influence on notch impact performance. The components of the spray-free polypropylene composition comprise 50-80% of polypropylene resin, 5-30% of talcum powder, 2-6% of toughening agent, 0.3-1% of black master batch, 0.2-1% of antioxidant and 0.05-2% of lubricant; when the toner is 0.005% -0.5% and the scattering point master batch is 14.3%, the spray point-free powder has better spraying point-free effect and mechanical property.
According to the test results of Table 4, as in the conventional formulation, the potassium feldspar was selected as the scattering point, which was visually very insignificant, because the surface gloss of the potassium feldspar was very similar to the matte feel caused by talc filling. When the ground color is deep, the effect of the toner on the coverage of the scattering dots is very large, and although the black ground color is realized, the scattering dots are very insignificant. When no talcum powder is filled, the potassium feldspar can be used as scattering points to realize good black matrix and white scattering points, but the dimensional stability is poor, and the application requirements in the fields of automobiles and the like are not met. When the internal mixer is used for processing, the rotor of the internal mixer can influence the particle size of the scattering points, so that the size of the scattering points is greatly reduced, and the scattering points are not obvious in vision.
The above examples of the present invention are merely illustrative examples of the present invention and are not intended to limit the embodiments of the present invention. Various modifications to the foregoing description will be readily apparent to those skilled in the art, and all embodiments are not intended to be exhaustive. Any modification, substitution, improvement, etc. that comes within the spirit and principles of the present invention should be included in the scope of the appended claims.
Claims (10)
1. The spray-free filling polypropylene material composition with the dot scattering effect comprises the following raw materials in percentage by mass:
50% -90% of base material; sprinkling master batches: 10% -50%;
the base material comprises the following raw materials in percentage by mass: 60-85% of polypropylene resin; 5-30% of talcum powder; 2-6% of toughening agent; black master batch 0.3-1%; 0.2 to 1 percent of antioxidant; 0.05-2% of lubricant; 0.005% -0.5% of toner;
the sprinkling master batch comprises the following raw materials in percentage by mass: 60-80% of polypropylene resin; 2% -15% of flash sheet; 5-20% of talcum powder; 2-6% of toughening agent; black master batch 0.3-0.7%; 0.2 to 1 percent of antioxidant; the method comprises the steps of carrying out a first treatment on the surface of the 0.05 to 2 percent of lubricant.
2. The composition according to claim 1, wherein the polypropylene resin is at least one of homo-polypropylene and co-polypropylene, and has a melt index of 10 to 30g/10min at 230 ℃ and 2.16 kg. .
3. The composition of claim 1, wherein the toughening agent is at least one of an ethylene-octene copolymer, an ethylene-butene copolymer, a high density polyethylene; and/or the mesh number of the talcum powder is 2000-6000.
4. The composition of claim 1, wherein the lubricant is at least one of zinc stearate, calcium stearate, aluminum stearate, barium stearate, polyethylene wax, and monoglyceride stearate.
5. The composition of claim 1, wherein the flash flakes in the sprinkled master batch are at least one of aluminum flakes, glitter powder, pearlescence powder, potassium feldspar chips.
6. The composition of claim 1, wherein the flash flakes are aluminum flakes having a diameter of at least two of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2 mm.
7. The composition of claim 1, wherein the flash sheet is at least one of circular, hexagonal, and quadrilateral in shape.
8. A method of preparing the composition of any one of claims 1-7, comprising the steps of:
s1, preparing a matrix PP: firstly, mixing talcum powder, toner and black master batch, then adding PP resin, a toughening agent, an antioxidant and a lubricant, stirring and mixing, extruding the mixture through a double-screw extruder, and granulating to obtain a matrix PP;
s2, preparing sprinkling master batches: stirring and mixing the flash sheet and the talcum powder, then feeding the mixture through a side feeding port, stirring and mixing the PP resin, the toughening agent, the antioxidant, the lubricant and the black master batch, extruding the mixture through a double-screw extruder, and granulating to obtain the sprinkling master batch;
s3, injection molding: blending the matrix PP and the scattering point master batch, and performing injection molding; wherein the injection molding temperature is 200-230 ℃ and the injection molding pressure is 55-70 MPa.
9. The method of claim 8, wherein in step S2, the twin screw extruder shears have an angle of less than 45 °, a thickness of less than 1D, and a number of less than 5.
10. Use of a composition according to any one of claims 1 to 7 in the automotive interior and exterior trim, household appliances and consumer goods industry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311730534.5A CN117820764A (en) | 2023-12-15 | 2023-12-15 | Spray-free filling polypropylene material composition with spreading effect and preparation method and application thereof |
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| CN202311730534.5A CN117820764A (en) | 2023-12-15 | 2023-12-15 | Spray-free filling polypropylene material composition with spreading effect and preparation method and application thereof |
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