CN116925453A - Black matrix for improving appearance of nylon glass fiber reinforced material and preparation method thereof - Google Patents
Black matrix for improving appearance of nylon glass fiber reinforced material and preparation method thereof Download PDFInfo
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- 239000011159 matrix material Substances 0.000 title claims abstract description 40
- 239000003365 glass fiber Substances 0.000 title claims abstract description 38
- 229920001778 nylon Polymers 0.000 title claims abstract description 31
- 239000004677 Nylon Substances 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 28
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 239000006229 carbon black Substances 0.000 claims abstract description 22
- -1 polyethylene Polymers 0.000 claims abstract description 19
- 229920013716 polyethylene resin Polymers 0.000 claims abstract description 19
- 239000004698 Polyethylene Substances 0.000 claims abstract description 17
- 229910021392 nanocarbon Inorganic materials 0.000 claims abstract description 17
- 229920000573 polyethylene Polymers 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 17
- 239000008187 granular material Substances 0.000 claims abstract description 16
- FWLHAQYOFMQTHQ-UHFFFAOYSA-N 2-N-[8-[[8-(4-aminoanilino)-10-phenylphenazin-10-ium-2-yl]amino]-10-phenylphenazin-10-ium-2-yl]-8-N,10-diphenylphenazin-10-ium-2,8-diamine hydroxy-oxido-dioxochromium Chemical compound O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.Nc1ccc(Nc2ccc3nc4ccc(Nc5ccc6nc7ccc(Nc8ccc9nc%10ccc(Nc%11ccccc%11)cc%10[n+](-c%10ccccc%10)c9c8)cc7[n+](-c7ccccc7)c6c5)cc4[n+](-c4ccccc4)c3c2)cc1 FWLHAQYOFMQTHQ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229920000767 polyaniline Polymers 0.000 claims abstract description 15
- 239000004014 plasticizer Substances 0.000 claims abstract description 10
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000005469 granulation Methods 0.000 claims abstract description 5
- 230000003179 granulation Effects 0.000 claims abstract description 5
- ZFOZVQLOBQUTQQ-UHFFFAOYSA-N Tributyl citrate Chemical group CCCCOC(=O)CC(O)(C(=O)OCCCC)CC(=O)OCCCC ZFOZVQLOBQUTQQ-UHFFFAOYSA-N 0.000 claims description 24
- 238000001125 extrusion Methods 0.000 claims description 15
- 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 claims description 9
- 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 claims description 9
- 238000009818 secondary granulation Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 238000009817 primary granulation Methods 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 229920001684 low density polyethylene Polymers 0.000 claims description 3
- 239000004702 low-density polyethylene Substances 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 2
- OKOBUGCCXMIKDM-UHFFFAOYSA-N Irganox 1098 Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)NCCCCCCNC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 OKOBUGCCXMIKDM-UHFFFAOYSA-N 0.000 claims description 2
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 9
- 239000000049 pigment Substances 0.000 abstract description 3
- 239000002861 polymer material Substances 0.000 abstract description 3
- 229920002292 Nylon 6 Polymers 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Natural products OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 229920001912 maleic anhydride grafted polyethylene Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
-
- 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
-
- 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
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—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
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08K3/02—Elements
- C08K3/04—Carbon
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a black matrix for improving the appearance of a nylon glass fiber reinforced material and a preparation method thereof, and relates to the technical field of polymer materials, wherein the black matrix comprises the following raw materials in parts by weight: 35-55 parts of polyethylene resin, 25-35 parts of nano carbon black powder, 10-25 parts of aniline black, 5-10 parts of polyethylene wax, 1-3 parts of citrate plasticizer and 0-0.5 part of antioxidant; the preparation method comprises the following steps: mixing polyethylene resin, polyethylene wax and an antioxidant, and adding the mixture into a double-screw extruder from a main feeding port; uniformly mixing nano carbon black powder and aniline black, adding the mixture into a double-screw extruder from an auxiliary feeding port, and granulating for one time to obtain primary granules; mixing the primary granules with a citrate plasticizer, adding into a double-screw extruder, and granulating for the second time to obtain the product. According to the invention, the black matrix with high black pigment content is obtained by adopting a twice granulation mode, and when the black matrix is used for the nylon fiber reinforced material, the fiber floating phenomenon can be effectively improved, and the surface glossiness of the material is increased.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a black matrix for improving the appearance of a nylon glass fiber reinforced material and a preparation method thereof.
Background
The PA6 is also called nylon 6, is a thermoplastic polymer material, has the characteristics of light weight, good toughness, good chemical resistance, good durability and the like, and is generally used for products such as automobile parts, mechanical parts, electronic and electric products, engineering accessories and the like. Since PA6 has good durability, abrasion resistance and impact resistance, it has good strength and stability even under high stress and heavy load; and the PA6 has good thermal stability, can be used for a long time in a high-temperature environment of 150 ℃, and if the glass fiber is added into the PA6, the use temperature can be more than 250 ℃, and the addition of the glass fiber can not only improve the modulus of the plastic product, but also improve the heat resistance of the plastic product.
However, when the high-temperature nylon 6 glass fiber reinforced material is used as an appearance piece, particularly when the black nylon 6 glass fiber reinforced material is used, the conditions of floating fiber, top white, dark spots, low strength and the like often occur. The fiber floating phenomenon is caused by the exposure of glass fibers. The white glass fiber floats on the outer surface in the plastic melt mold filling process, and radial white marks are formed on the surface of the plastic part after condensation molding. When the plastic part is black, the increase due to the color difference is more pronounced. Therefore, the problem of appearance fiber floating of the nylon glass fiber reinforced material is solved, and the method has very important significance for the application of the high-temperature nylon to appearance parts.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a black matrix for improving the appearance of a nylon glass fiber reinforced material and a preparation method thereof, and the material fiber floating phenomenon is improved by optimizing a formula and a preparation process.
The invention provides a black matrix for improving the appearance of a nylon glass fiber reinforced material, which comprises the following raw materials in parts by weight: 35-55 parts of polyethylene resin, 25-35 parts of nano carbon black powder, 10-25 parts of aniline black, 5-10 parts of polyethylene wax, 1-3 parts of citrate plasticizer and 0-0.5 part of antioxidant.
Preferably, the polyethylene resin is a low-density polyethylene resin, and the melt index under the conditions of 190 ℃ and 2.16kg is 2-5 g/10min.
Preferably, the citrate plasticizer is tributyl citrate.
Preferably, the polyethylene wax has a molecular weight of 2000 to 5000.
Preferably, the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 1098, antioxidant 168 and antioxidant DLTDP.
Preferably, the antioxidant is antioxidant 1010 and antioxidant 168 according to the following weight ratio of 3-5: 1 weight ratio.
Preferably, the particle size of the nano carbon black powder is 20-100 nm.
The invention also provides a preparation method of the black matrix for improving the appearance of the nylon glass fiber reinforced material, which comprises the following steps: uniformly mixing polyethylene resin, polyethylene wax and an antioxidant, and adding the mixture into a double-screw extruder from a main feeding port; uniformly mixing nano carbon black powder and aniline black, adding the mixture into a double-screw extruder for 2 to 3 times from an auxiliary feeding port, carrying out melt extrusion, and carrying out primary granulation to obtain primary granules; and (3) uniformly mixing the primary granules with the citrate plasticizer, adding the mixture into a double-screw extruder, carrying out melt extrusion, and carrying out secondary granulation to obtain the black matrix.
Preferably, in one pelletization, the temperature of the main machine of the twin-screw extruder is controlled to be 170-210 ℃.
Preferably, in the secondary granulation, the temperature of the main machine of the twin-screw extruder is controlled to be 170-200 ℃.
The beneficial effects are that: according to the invention, a black matrix with high black pigment content is obtained by adopting a twice granulation mode, and a dispersing agent polyvinyl alcohol is added during the first granulation, so that the wetting and dispersing effects on carbon black and nigrosine are enhanced, and the dispersing effect of the carbon black and the nigrosine in a system is improved; and then, the citric acid ester plasticizer is added during the second granulation, so that the fluidity of the PA6 polymer chain can be improved, the dispersion capacity of the carbon black and the nigrosine in the polyethylene resin base material can be further improved, and the distribution uniformity of the carbon black and the nigrosine can be improved. Compared with the simultaneous addition of polyvinyl alcohol and citric acid ester plasticizer, the method avoids the reduction of the shearing force of the carbon black and the nigrosine in an extruder caused by the reduction of the viscosity of the system, and further reduces the dispersing effect. The black pigment in the black matrix prepared by the method has good dispersibility, and can effectively improve the fiber floating phenomenon, increase the surface glossiness of the material and solve the problems of dark spots and the like when being used for the nylon glass fiber reinforcing material.
Detailed Description
In the following examples, the polyethylene resin was a low density polyethylene resin having a melt index of 2.2g/10min at 190℃under 2.16 kg; the grafting rate of the maleic anhydride grafted polyethylene is 1.7%; the specifications of the chopped glass fiber are as follows: the diameter is 10 μm and the length is 4mm.
The technical scheme of the invention is described in detail through specific embodiments.
Example 1
The invention provides a black matrix for improving the appearance of a nylon glass fiber reinforced material, which comprises the following raw materials in parts by weight: 35 parts of polyethylene resin, 28 parts of nano carbon black powder (particle size of 20 nm), 25.5 parts of aniline black, 10 parts of polyethylene wax (molecular weight of 3000), 1 part of tributyl citrate and 0.5 part of antioxidant; wherein the antioxidant is antioxidant 1010 and antioxidant 168 according to 3:1 weight ratio;
the black matrix was prepared as follows: uniformly mixing polyethylene resin, polyethylene wax and an antioxidant, and adding the mixture into a double-screw extruder from a main feeding port; uniformly mixing nano carbon black powder and aniline black, adding the mixture into a double-screw extruder for 2 times from an auxiliary feeding port, controlling the temperature of a main machine to be 180 ℃, carrying out melt extrusion, and carrying out primary granulation to obtain primary granules; mixing the primary granules and tributyl citrate uniformly, adding the mixture into a double-screw extruder, controlling the temperature of a main machine to 175 ℃, carrying out melt extrusion, and carrying out secondary granulation to obtain the black matrix.
Example 2
The invention provides a black matrix for improving the appearance of a nylon glass fiber reinforced material, which comprises the following raw materials in parts by weight: 40 parts of polyethylene resin, 30 parts of nano carbon black powder (with the particle size of 40 nm), 20 parts of aniline black, 8 parts of polyethylene wax (with the molecular weight of 4000), 1.5 parts of tributyl citrate and 0.5 part of antioxidant; wherein the antioxidant is antioxidant 1010 and antioxidant 168 according to the following formula 4:1 weight ratio;
the black matrix was prepared as follows: uniformly mixing polyethylene resin, polyethylene wax and an antioxidant, and adding the mixture into a double-screw extruder from a main feeding port; uniformly mixing nano carbon black powder and aniline black, adding the mixture into a double-screw extruder for 2 times from an auxiliary feeding port, controlling the temperature of a main machine to be 190 ℃, carrying out melt extrusion, and carrying out primary granulation to obtain primary granules; mixing the primary granules and tributyl citrate uniformly, adding the mixture into a double-screw extruder, controlling the temperature of a main machine to be 180 ℃, carrying out melt extrusion, and carrying out secondary granulation to obtain the black matrix.
Example 3
The invention provides a black matrix for improving the appearance of a nylon glass fiber reinforced material, which comprises the following raw materials in parts by weight: 46 parts of polyethylene resin, 28 parts of nano carbon black powder (with the particle size of 60 nm), 15 parts of aniline black, 8 parts of polyethylene wax (with the molecular weight of 4000), 2.5 parts of tributyl citrate and 0.5 part of antioxidant; wherein the antioxidant is antioxidant 1010 and antioxidant 168 according to the following formula 4:1 weight ratio;
the black matrix was prepared as follows: uniformly mixing polyethylene resin, polyethylene wax and an antioxidant, and adding the mixture into a double-screw extruder from a main feeding port; uniformly mixing nano carbon black powder and aniline black, adding the mixture into a double-screw extruder for 2 times from an auxiliary feeding port, controlling the temperature of a main machine to be 200 ℃, carrying out melt extrusion, and carrying out primary granulation to obtain primary granules; mixing the primary granules and tributyl citrate uniformly, adding the mixture into a double-screw extruder, controlling the temperature of a main machine to be 190 ℃, carrying out melt extrusion, and carrying out secondary granulation to obtain the black matrix.
Example 4
The invention provides a black matrix for improving the appearance of a nylon glass fiber reinforced material, which comprises the following raw materials in parts by weight: 55 parts of polyethylene resin, 25 parts of nano carbon black powder (with the particle size of 100 nm), 10 parts of aniline black, 8 parts of polyethylene wax (with the molecular weight of 5000), 1.5 parts of tributyl citrate and 0.5 part of antioxidant; wherein the antioxidant is antioxidant 1010 and antioxidant 168 according to 5:1 weight ratio;
the black matrix was prepared as follows: uniformly mixing polyethylene resin, polyethylene wax and an antioxidant, and adding the mixture into a double-screw extruder from a main feeding port; uniformly mixing nano carbon black powder and aniline black, adding the mixture into a double-screw extruder from an auxiliary feeding port for 3 times, controlling the temperature of a main machine to be 210 ℃, carrying out melt extrusion, and carrying out primary granulation to obtain primary granules; mixing the primary granules and tributyl citrate uniformly, adding the mixture into a double-screw extruder, controlling the temperature of a main machine to be 200 ℃, carrying out melt extrusion, and carrying out secondary granulation to obtain the black matrix.
Comparative example 1
A black matrix, which differs from example 3 only in that: no tributyl citrate is contained; the preparation method is the same as in example 3.
Nylon glass fiber reinforced material and preparation thereof are the same as in example 3.
Comparative example 2
The black master differs from example 3 only in the preparation method, specifically as follows: uniformly mixing polyethylene resin, polyethylene wax, an antioxidant and tributyl citrate, and adding the mixture into a double-screw extruder from a main feeding port; uniformly mixing nano carbon black powder and aniline black, adding the mixture into a double-screw extruder for 2 times from an auxiliary feeding port, controlling the temperature of a main machine to be 200 ℃, carrying out melt extrusion, and carrying out primary granulation to obtain primary granules; adding the primary granules into a double-screw extruder, controlling the temperature of a main machine to be 190 ℃, carrying out melt extrusion, and carrying out secondary granulation.
The black matrix prepared in the invention examples 1-4 and comparative examples 1-2 was used in nylon glass fiber reinforcement; the nylon glass fiber reinforced material comprises the following raw materials in parts by weight: 50 parts of PA6, 36 parts of chopped glass fibers, 7 parts of compatilizer maleic anhydride grafted polyethylene, 0.5 part of antioxidant, 0.5 part of lubricant ethylene bis fatty acid amide and 6 parts of black matrix; wherein, the antioxidant is antioxidant 1010 and antioxidant 168 according to the following weight ratio of 5:2 weight ratio; the preparation method comprises the following steps: uniformly mixing PA6, a compatilizer, an antioxidant, a lubricant and a black matrix, and adding the mixture into a double-screw extruder from a main feeding port; adding glass fiber into a double-screw extruder from an auxiliary feeding port for 2 times, controlling the temperature of a main machine to be 235 ℃, carrying out melt extrusion, cooling, granulating and drying to obtain the nylon glass fiber reinforced material.
The performance of nylon glass fiber reinforcements prepared using the black matrices of inventive examples 1-4 and comparative examples 1-2 was examined for gloss. The glossiness test is carried out according to GB 8807-1988 method for testing specular gloss of plastics, which adopts three angles of 20 degrees, 60 degrees and 80 degrees.
The test results are shown in Table 1.
TABLE 1 test results for examples 1-4 and comparative examples 1-2
| Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 | |
| Gloss 20 ° | 8.4 | 10.2 | 9.7 | 8.8 | 6.2 | 6.0 |
| Gloss 60 ° | 27.9 | 33.7 | 31.8 | 29.5 | 20.3 | 19.8 |
| Gloss 80 ° | 59.8 | 66.2 | 63.4 | 60.6 | 48.1 | 45.2 |
| Appearance of the product | Good quality | Good quality | Good quality | Good quality | Floating fiber | Floating fiber |
As can be seen from Table 1, the gloss values in examples 1-4 are higher than those in comparative examples 1-2, and the nylon glass fiber reinforcement has no floating fiber on the surface and no macroscopic defect.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. The black matrix for improving the appearance of the nylon glass fiber reinforced material is characterized by comprising the following raw materials in parts by weight: 35-55 parts of polyethylene resin, 25-35 parts of nano carbon black powder, 10-25 parts of aniline black, 5-10 parts of polyethylene wax, 1-3 parts of citrate plasticizer and 0-0.5 part of antioxidant.
2. The black matrix for improving the appearance of nylon glass fiber reinforced material according to claim 1, wherein the polyethylene resin is a low density polyethylene resin, and the melt index under the conditions of 190 ℃ and 2.16kg is 2-5 g/10min.
3. The black matrix for improving the appearance of nylon glass fiber reinforcement according to claim 1, wherein the citrate plasticizer is tributyl citrate.
4. The black matrix for improving the appearance of nylon glass fiber reinforcement according to claim 1, wherein the polyethylene wax has a molecular weight of 2000 to 5000.
5. The black matrix for improving the appearance of nylon glass fiber reinforced materials according to claim 1, wherein the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 1098, antioxidant 168 and antioxidant DLTDP.
6. The black matrix for improving the appearance of nylon glass fiber reinforced material according to claim 5, wherein the antioxidant is antioxidant 1010 and antioxidant 168 according to 3-5: 1 weight ratio.
7. The black matrix for improving the appearance of nylon glass fiber reinforcement according to claim 1, wherein the particle size of the nano carbon black powder is 20 to 100nm.
8. A method for preparing a black matrix for improving the appearance of nylon glass fiber reinforcement according to any one of claims 1 to 7, comprising the steps of: uniformly mixing polyethylene resin, polyethylene wax and an antioxidant, and adding the mixture into a double-screw extruder from a main feeding port; uniformly mixing nano carbon black powder and aniline black, adding the mixture into a double-screw extruder for 2 to 3 times from an auxiliary feeding port, carrying out melt extrusion, and carrying out primary granulation to obtain primary granules; and (3) uniformly mixing the primary granules with the citrate plasticizer, adding the mixture into a double-screw extruder, carrying out melt extrusion, and carrying out secondary granulation to obtain the black matrix.
9. The method for preparing a black matrix for improving the appearance of a nylon glass fiber reinforced material according to claim 8, wherein the main machine temperature of the twin-screw extruder is controlled to be 170-210 ℃ in one granulation.
10. The method for preparing a black matrix for improving the appearance of a nylon glass fiber reinforced material according to claim 8, wherein the temperature of the main machine of the twin-screw extruder is controlled to be 170-200 ℃ in the secondary granulation.
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