CN113773639A - Special glass fiber reinforced polyamide composite material for 5G and preparation method thereof - Google Patents
Special glass fiber reinforced polyamide composite material for 5G and preparation method thereof Download PDFInfo
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- CN113773639A CN113773639A CN202011637480.4A CN202011637480A CN113773639A CN 113773639 A CN113773639 A CN 113773639A CN 202011637480 A CN202011637480 A CN 202011637480A CN 113773639 A CN113773639 A CN 113773639A
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 72
- 239000002131 composite material Substances 0.000 title claims abstract description 40
- 239000004952 Polyamide Substances 0.000 title claims abstract description 39
- 229920002647 polyamide Polymers 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 70
- 238000005187 foaming Methods 0.000 claims abstract description 50
- 150000001875 compounds Chemical class 0.000 claims abstract description 48
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 47
- 229920006122 polyamide resin Polymers 0.000 claims abstract description 38
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 27
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 23
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 23
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 23
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 23
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000002667 nucleating agent Substances 0.000 claims abstract description 23
- 239000012745 toughening agent Substances 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000001125 extrusion Methods 0.000 claims description 38
- 238000002156 mixing Methods 0.000 claims description 35
- 238000001035 drying Methods 0.000 claims description 23
- 238000007605 air drying Methods 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 19
- 239000000155 melt Substances 0.000 claims description 19
- 238000004806 packaging method and process Methods 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 17
- 230000005389 magnetism Effects 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 16
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 10
- 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 description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 abstract description 7
- 238000004891 communication Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000002101 nanobubble Substances 0.000 abstract 1
- 238000003672 processing method Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 48
- 239000004677 Nylon Substances 0.000 description 5
- 229920001778 nylon Polymers 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 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
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000013012 foaming technology Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000003951 lactams Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0085—Use of fibrous compounding ingredients
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
-
- 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
Abstract
The invention discloses a 5G special glass fiber reinforced polyamide composite material and a preparation method thereof, wherein the composite material comprises the following raw materials in percentage by weight: the weight percentages of the raw materials are as follows: 50-75% of polyamide resin, 2-6% of micro-foaming master batch, 10-40% of glass fiber, 5-10% of calcined kaolin, 3-5% of toughening agent, 0.2-0.6% of compound antioxidant, 0.5-1% of processing aid and 1-2% of compound nucleating agent. According to the invention, through a series of component proportions and processing methods, the 5G special glass fiber reinforced polyamide composite material is simple to operate in the preparation process, and meanwhile, substances such as nano bubbles and the like are contained in the composite material by virtue of the micro-foaming master batch, so that the dielectric constant of the material can be reduced, the 5G communication requirement is met, the specific gravity of the material is reduced, and the material has excellent material performance.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a 5G special glass fiber reinforced polyamide composite material and a preparation method thereof.
Background
The polyamide is commonly known as nylon and is a general name of a high polymer containing amide groups in a macromolecule main chain repeating unit, the polyamide can be prepared by ring-opening polymerization of lactam, also can be prepared by polycondensation of diamine and dibasic acid and the like, and the polyamide resin has good comprehensive properties including mechanical property, heat resistance, wear resistance, chemical resistance and self-lubricity, has low friction coefficient, certain flame retardance and easy processing, is suitable for being filled with glass fibers and other fillers for reinforcing and modifying, improves the performance and expands the application range.
In the field of nylon application in wire and cable communication, particularly with the continuous development of science and technology today, the 5G technology is mature continuously, and in the actual nylon application, although the nylon has numerous advantages, the nylon has a large water absorption rate, the dielectric constant of unmodified polyamide resin is 4-5, and the requirement that the low dielectric constant of 5G communication is less than 3.0 cannot be met, for the problem, in the prior art, the material is improved, and the reduction of the dielectric constant of the material is realized, in the process, the specific gravity of the material is easily increased, and it is known that air is a medium with the lowest dielectric constant, the dielectric constant of air is 1, and how to form air bubbles inside the material is a hot topic of current research.
Disclosure of Invention
The invention aims to provide a 5G special glass fiber reinforced polyamide composite material and a preparation method thereof, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the 5G special glass fiber reinforced polyamide composite material comprises the following raw materials in percentage by weight: 50-75% of polyamide resin, 2-6% of micro-foaming master batch, 10-40% of glass fiber, 5-10% of calcined kaolin, 3-5% of toughening agent, 0.2-0.6% of compound antioxidant, 0.5-1% of processing aid and 1-2% of compound nucleating agent.
Preferably, the toughening agent is polyolefin grafted maleic anhydride.
Preferably, the compound antioxidant is a mixture of 1098, 627A and zinc oxide, and the ratio of the 1098 to 627A to zinc oxide is 2:2: 1.
Preferably, the processing aid is any one of hyperbranched resin, silicone and a silane coupling agent.
Preferably, the compound nucleating agent is prepared by compounding 20000-mesh talcum powder and Bluggeman P32, and the proportion of the talcum powder to the Bluggeman P32 is 5: 1.
preferably, the preparation method of the micro-foaming master batch comprises the following steps:
s1, mixing 40-60% of foaming micro powder, 38-58% of POE resin and 2% of processing aid in a high-speed mixer according to a certain proportion to ensure that all components are fully stirred and uniformly dispersed;
s2, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 120-140 ℃, and the screw rotation speed is 300-500 r/m;
s3, cooling, air drying, cutting into granules, strong magnetic, packaging and warehousing the extruded materials.
The invention also provides a preparation method of the special 5G glass fiber reinforced polyamide composite material, which specifically comprises the following steps:
s1, drying the polyamide resin with the corresponding dosage;
s2 mixing the dried polyamide resin, the micro-foaming master batch, the calcined kaolin, the toughening agent, the compound antioxidant, the processing aid and the compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, and the screw rotation speed is 300-500 r/m; feeding glass fiber side;
s4, cooling, air-drying, granulating and processing by strong magnetism;
s5 mixing the micro-foaming master batch according to the proportion of 2-6% of WT, packaging and warehousing.
Compared with the prior art, the invention has the beneficial effects that:
according to the 5G special glass fiber reinforced polyamide composite material and the preparation method thereof, the special micro-foaming master batch is used for promoting the realization of a micro-foaming technology, the high-temperature micro-foaming master batch is added in the material forming process, and nano-scale micropores are formed in the material through melting and high-temperature micro-foaming, so that the dielectric constant is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses a 5G special glass fiber reinforced polyamide composite material and a preparation method thereof, wherein the glass fiber reinforced polyamide composite material comprises the following raw materials in percentage by weight: 50-75% of polyamide resin, 2-6% of micro-foaming master batch, 10-40% of glass fiber, 5-10% of calcined kaolin, 3-5% of toughening agent, 0.2-0.6% of compound antioxidant, 0.5-1% of processing aid and 1-2% of compound nucleating agent.
Specifically, the toughening agent is polyolefin grafted maleic anhydride.
Further, the compound antioxidant is a mixture of 1098, 627A and zinc oxide, and the ratio of the three is 2:2: 1.
Further, the processing aid is any one of hyperbranched resin, silicone and a silane coupling agent.
Further, the compound nucleating agent is prepared by compounding 20000-mesh talcum powder and Bluggeman P32, and the proportion of the talcum powder to the Bluggeman P32 is 5: 1.
further, the preparation method of the micro-foaming master batch comprises the following steps of:
s1, mixing 40-60% of foaming micro powder, 38-58% of POE resin and 2% of processing aid WT in a high-speed mixer according to a certain proportion to ensure that all components are fully stirred and uniformly dispersed, wherein the processing aid is a mixture of an antioxidant 1010 and PETS;
s2, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 120-140 ℃, and the screw rotation speed is 300-500 r/m.
S3, cooling, air drying, cutting into granules, strong magnetic, packaging and warehousing the extruded materials.
Furthermore, the preparation steps of the special 5G glass fiber reinforced polyamide composite material are as follows: s1, drying the polyamide resin with the corresponding dosage;
s2 mixing the dried polyamide resin, the micro-foaming master batch, the calcined kaolin, the toughening agent, the compound antioxidant, the processing aid and the compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, and the screw rotation speed is 300-500 r/m; feeding glass fiber side;
s4, cooling, air-drying, granulating and processing by strong magnetism;
s5 mixing the micro-foaming master batch according to the proportion of 2-6% of WT, packaging and warehousing.
Aiming at the difference of the percentages of all the components of the special 5G glass fiber reinforced polyamide composite material and the preparation method thereof, 7 groups of examples are carried out, and 5 groups of comparative experiments are carried out.
Example 1
In this embodiment 5G, the special glass fiber reinforced polyamide composite material and the preparation method thereof specifically include, in terms of the weight percentage of the raw materials, the step of S1 drying polyamide resin with a total mass percentage of 74.8%;
s2, after drying, mixing 74.8% of polyamide resin, 2% of micro-foaming master batch, 5% of calcined kaolin, 5% of toughening agent, 0.6% of compound antioxidant, 0.6% of processing aid and 2% of compound nucleating agent in a high-speed mixer, and fully stirring and uniformly dispersing all the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 10 percent of glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 2% of micro-foaming master batch according to the proportion, packaging and warehousing.
Example 2
In this embodiment 5G, the special glass fiber reinforced polyamide composite material and the preparation method thereof specifically include, in terms of the weight percentage of the raw materials, the step of S1 drying polyamide resin with a total mass percentage of 66.4%;
s2, after drying, mixing 66.4% of polyamide resin, 2% of micro-foaming master batch, 5% of calcined kaolin, 4% of toughening agent, 0.4% of compound antioxidant, 0.6% of processing aid and 1.6% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 20% of glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 2% of micro-foaming master batch according to the proportion, packaging and warehousing.
Example 3
In this embodiment 5G, the special glass fiber reinforced polyamide composite material and the preparation method thereof specifically include, in terms of the weight percentage of the raw materials, the step of S1 drying polyamide resin with a total mass percentage of 57.5%;
s2, after drying, mixing 57.5% of polyamide resin, 2% of micro-foaming master batch, 5% of calcined kaolin, 3% of toughening agent, 0.3% of compound antioxidant, 0.8% of processing aid and 1.4% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 30% of glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 2% of micro-foaming master batch according to the proportion, packaging and warehousing.
Example 4
In this embodiment 5G, the special glass fiber reinforced polyamide composite material and the preparation method thereof specifically include, in terms of the weight percentage of the raw materials, the step of S1 drying polyamide resin with a total mass percentage of 47.8%;
s2, after drying, mixing 47.8% of polyamide resin, 2% of micro-foaming master batch, 5% of calcined kaolin, 3% of toughening agent, 0.2% of compound antioxidant, 1% of processing aid and 1% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 40% of glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 2% of micro-foaming master batch according to the proportion, packaging and warehousing.
Example 5
In this embodiment 5G, the special glass fiber reinforced polyamide composite material and the preparation method thereof specifically include, in terms of the weight percentage of the raw materials, the step of S1 drying polyamide resin with a total mass percentage of 55.5%;
s2, after drying, mixing 55.5% of polyamide resin, 6% of micro-foaming master batch, 5% of calcined kaolin, 3% of toughening agent, 0.3% of compound antioxidant, 0.8% of processing aid and 1.4% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 30% of glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 4% of micro-foaming master batch according to the proportion, packaging and warehousing.
Example 6
In this embodiment 5G, the special glass fiber reinforced polyamide composite material and the preparation method thereof specifically include, in terms of the weight percentage of the raw materials, the step of S1 drying polyamide resin with a total mass percentage of 53.5%;
s2, after drying, mixing 53.5% of polyamide resin, 6% of micro-foaming master batch, 5% of calcined kaolin, 3% of toughening agent, 0.3% of compound antioxidant, 0.8% of processing aid and 1.4% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 30% of glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 6% of micro-foaming master batch according to the proportion, packaging and warehousing.
Example 7
In the embodiment 5G of the special glass fiber reinforced polyamide composite material and the preparation method thereof, the specific steps are, in terms of the weight percentage of the raw materials, S1 is to perform drying treatment on polyamide resin with a total mass percentage of 52.5%;
s2, after drying, mixing 52.5% of polyamide resin, 2% of micro-foaming master batch, 10% of calcined kaolin, 3% of toughening agent, 0.3% of compound antioxidant, 0.8% of processing aid and 1.4% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 30% of glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 2% of micro-foaming master batch according to the proportion, packaging and warehousing.
Comparative example 1
According to the special glass fiber reinforced polyamide composite material for the comparative example 5G and the preparation method thereof, the specific steps are that S1 dries polyamide resin with the total mass percentage of 64.5 percent;
s2, after drying, mixing 64.5% of polyamide resin, 0% of micro-foaming master batch, 0% of calcined kaolin, 3% of toughening agent, 0.3% of compound antioxidant, 0.8% of processing aid and 1.4% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 30% of glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 0% of micro-foaming master batch according to the proportion, packaging and warehousing.
Comparative example 2
According to the special glass fiber reinforced polyamide composite material for the comparative example 5G and the preparation method thereof, the specific steps are that S1 dries polyamide resin with the total mass percent of 62.5 percent;
s2, after drying, mixing 62.5% of polyamide resin, 2% of micro-foaming master batch, 0% of calcined kaolin, 3% of toughening agent, 0.3% of compound antioxidant, 0.8% of processing aid and 1.4% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 30% of glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 2% of micro-foaming master batch according to the proportion, packaging and warehousing.
Comparative example 3
According to the special glass fiber reinforced polyamide composite material for the comparative example 5G and the preparation method thereof, the specific steps are that S1 dries polyamide resin with the total mass percentage of 59.5 percent;
s2, after drying, mixing 59.5% of polyamide resin, 0% of micro-foaming master batch, 5% of calcined kaolin, 3% of toughening agent, 0.3% of compound antioxidant, 0.8% of processing aid and 1.4% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 30% of glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 0% of micro-foaming master batch according to the proportion, packaging and warehousing.
Comparative example 3
According to the special glass fiber reinforced polyamide composite material for the comparative example 5G and the preparation method thereof, the specific steps are that S1 dries polyamide resin with the total mass percentage of 59.5 percent;
s2, after drying, mixing 59.5% of polyamide resin, 0% of micro-foaming master batch, 5% of calcined kaolin, 3% of toughening agent, 0.3% of compound antioxidant, 0.8% of processing aid and 1.4% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 30% of glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 0% of micro-foaming master batch according to the proportion, packaging and warehousing.
Comparative example 4
According to the special glass fiber reinforced polyamide composite material for the comparative example 5G and the preparation method thereof, the specific steps are that S1 dries polyamide resin with the total mass percentage of 59.5 percent;
s2, after drying, mixing 59.5% of polyamide resin, 0% of micro-foaming master batch, 5% of calcined kaolin, 3% of toughening agent, 0.3% of compound antioxidant, 0.8% of processing aid and 1.4% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 30 percent of low-dielectric glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 0% of micro-foaming master batch according to the proportion, packaging and warehousing.
Comparative example 5
According to the special glass fiber reinforced polyamide composite material for the comparative example 5G and the preparation method thereof, the specific steps are that S1 dries polyamide resin with the total mass percent of 55.5 percent;
s2, after drying, mixing 59.5% of polyamide resin, 4% of micro-foaming master batch, 5% of calcined kaolin, 3% of toughening agent, 0.3% of compound antioxidant, 0.8% of processing aid and 1.4% of compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, the screw rotation speed is 300-500 rpm, and 30 percent of low-dielectric glass fiber is fed and added laterally;
s4, cooling, air-drying, granulating and processing by strong magnetism;
and S5, mixing 0% of micro-foaming master batch according to the proportion, packaging and warehousing.
In summary, the experimental data of examples 1 to 7 and comparative examples 1 to 5 are combined together and, in weight percent, the following table one is obtained:
TABLE 1 ingredient Table of 5G special glass fiber reinforced polyamide composite materials prepared in examples and comparative examples
For the experiments of examples 1-7 and comparative examples 1-5, the performance test criteria and the data obtained are shown in Table 2 below:
table 2 shows that the 5G special glass fiber reinforced polyamide composite material prepared by the examples and the comparative examples and the preparation method thereof
From the data in tables 1 and 2, it can be seen that in the case where the material of comparative example 1 is sufficiently lacking calcined kaolin and a micro-foamed masterbatch, as compared with comparative example 1, the specific gravity of the material is higher, except that the data of example 4 is the same as that of comparative example 1, the specific gravities of the materials obtained in the other examples are all smaller than those of comparative example 1, and the tensile strength, flexural strength and notched impact strength of the material obtained in comparative example 1 are, except for example 4, the tensile strength of the materials of the other examples is less than that of the material of the comparative example 1, and the elongation at break is higher than that of the material of the comparative example 6, the elongation at break of the materials obtained in the other examples was greater than that of the material obtained in comparative example 1, and in terms of dielectric constant, the dielectric constants of the materials obtained in comparative example 1 are all greater than those of the materials obtained in comparative examples 1 to 7, and the data of dielectric loss factors show that the dielectric loss factors of comparative example 1 are all larger than those of the materials obtained in examples 1-7; in comparison with comparative example 2, in the absence of calcined kaolin in the raw material of comparative example 2, the tensile strength of the material obtained in example 4 is greater than that of comparative example 2, and the tensile strength of the material obtained in comparative example 2 is less than that of comparative example 2, while the dielectric constant of the material obtained in comparative example 2 is greater than that of examples 3 to 7 except for examples 1 and 2, and accordingly, in the dielectric loss factor, the dielectric loss factor of the material obtained in comparative example 2 is greater than that of examples 3 to 7 except for examples 1 and 2; in comparison with comparative example 3, in the case where the material of comparative example 3 lacks the micro-foamed masterbatch, the specific gravities of the obtained materials are all greater than those of the materials of examples 1 to 7, and the dielectric constant and the dielectric dissipation factor of the material of comparative example 3 are both greater than those of the materials of examples 1 to 7.
It should be noted that, in comparative examples 4 and 5, since the dielectric constant of the obtained material is significantly changed after the low dielectric glass fiber is substituted for the normal glass fiber, in the material components of comparative example 4 and comparative example 3, the low dielectric glass fiber is added in comparative example 4, the normal glass fiber is added in comparative example 3, the mixture ratio of other materials is the same as that of comparative example 3, and in the obtained material, the dielectric constant of comparative example 4 is significantly less than that of comparative example 3, especially in the comparison of the data of comparative example 5 and example 5, it can be seen that in the case of the calcined kaolin and the micro-foaming master batch existing in comparative example 5, only the low dielectric glass fiber different from example 5 is used, and the dielectric constant of the obtained material is significantly changed, therefore, under the condition that the common glass fiber is substituted for the low dielectric glass fiber, or the compound material of the common glass fiber and the low dielectric glass fiber is used, the obtained material has more excellent performances such as dielectric constant and the like.
The conventionally used low dielectric product needs to consider the thermal expansion coefficient of the material in addition to the dielectric constant, and needs to be as close to the metal as possible, so that the glass fiber is required to be more than 30% to be matched with the metal for use.
From the results, it can be seen that, in the forming process of the glass fiber reinforced polyamide composite material suitable for 5G, the high-temperature micro-foaming master batch is added, bubbles can be generated in the material on the basis of melting the micro-foaming master batch and high-temperature micro-foaming, so that the effect of bubble lining is realized, the dielectric constant of the material is favorably reduced, the common glass fiber can be replaced by the low-dielectric glass fiber or the compound material of the common glass fiber and the low-dielectric glass fiber, the specific gravity of the material is reduced under the condition that the dielectric constant of the obtained material is less than 3, other properties of the actually obtained material are excellent, particularly, the material prepared in the embodiment 4 has better tensile strength, elongation at break, bending strength, bending modulus, notch impact strength, filling content and the like than those of the materials prepared in other embodiments except that the specific gravity of the material is higher than that of the other embodiments, and meets the dielectric constant requirement special for 5G.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The special glass fiber reinforced polyamide composite material for 5G is characterized in that: the weight percentages of the raw materials are as follows: 50-75% of polyamide resin, 2-6% of micro-foaming master batch, 10-40% of glass fiber, 5-10% of calcined kaolin, 3-5% of toughening agent, 0.2-0.6% of compound antioxidant, 0.5-1% of processing aid and 1-2% of compound nucleating agent.
2. The 5G special-purpose glass fiber reinforced polyamide composite material according to claim 1, wherein: the toughening agent is polyolefin grafted maleic anhydride.
3. The 5G special-purpose glass fiber reinforced polyamide composite material according to claim 1, wherein: the compound antioxidant is a mixture of 1098, 627A and zinc oxide, and the ratio of the 1098 to 627A to zinc oxide is 2:2: 1.
4. The 5G special-purpose glass fiber reinforced polyamide composite material according to claim 1, wherein: the processing aid is any one of hyperbranched resin, silicone and a silane coupling agent.
5. The 5G special-purpose glass fiber reinforced polyamide composite material according to claim 1, wherein: the compound nucleating agent is prepared by compounding 20000-mesh talcum powder and Bluggeman P32, and the proportion of the talcum powder to the Bluggeman P32 is 5: 1.
6. the 5G special-purpose glass fiber reinforced polyamide composite material according to claim 1, wherein: the preparation method of the micro-foaming master batch comprises the following steps of:
s1, mixing 40-60% of foaming micro powder, 38-58% of POE resin and 2% of processing aid in a high-speed mixer according to a certain proportion to ensure that all components are fully stirred and uniformly dispersed;
s2, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 120-140 ℃, and the screw rotation speed is 300-500 r/m;
s3, cooling, air drying, cutting into granules, strong magnetic, packaging and warehousing the extruded materials.
7. The preparation method of the 5G special glass fiber reinforced polyamide composite material according to any one of claims 1 to 6, characterized by comprising the following steps: the preparation steps of the special 5G glass fiber reinforced polyamide composite material are as follows:
s1, drying the polyamide resin with the corresponding dosage;
s2 mixing the dried polyamide resin, the micro-foaming master batch, the calcined kaolin, the toughening agent, the compound antioxidant, the processing aid and the compound nucleating agent in a high-speed mixer to fully stir and uniformly disperse the components;
s3, adding the mixed materials into a double-screw extruder for melt extrusion, wherein the melt extrusion temperature is 260-300 ℃, and the screw rotation speed is 300-500 r/m; feeding glass fiber side;
s4, cooling, air-drying, granulating and processing by strong magnetism;
s5 mixing the micro-foaming master batch according to the proportion of 2-6% of WT, packaging and warehousing.
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