CN115895142A - PVC cable material for 5G photoelectric integrated cable and preparation method and application thereof - Google Patents
PVC cable material for 5G photoelectric integrated cable and preparation method and application thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003063 flame retardant Substances 0.000 claims abstract description 33
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229920001577 copolymer Polymers 0.000 claims abstract description 21
- 229960003638 dopamine Drugs 0.000 claims abstract description 21
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 20
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims abstract description 20
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 20
- 239000010452 phosphate Substances 0.000 claims abstract description 20
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims abstract description 18
- 239000004209 oxidized polyethylene wax Substances 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 15
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000006084 composite stabilizer Substances 0.000 claims abstract description 11
- 239000004698 Polyethylene Substances 0.000 claims abstract description 10
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 10
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 10
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 10
- -1 polyethylene Polymers 0.000 claims abstract description 10
- 229920000573 polyethylene Polymers 0.000 claims abstract description 10
- 239000008117 stearic acid Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims description 39
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 26
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims description 12
- 229960001545 hydrotalcite Drugs 0.000 claims description 12
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 12
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 3
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- JNXDCMUUZNIWPQ-UHFFFAOYSA-N trioctyl benzene-1,2,4-tricarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C(C(=O)OCCCCCCCC)=C1 JNXDCMUUZNIWPQ-UHFFFAOYSA-N 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 239000004014 plasticizer Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229920001690 polydopamine Polymers 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a PVC cable material for a 5G photoelectric integrated cable and a preparation method and application thereof, wherein the PVC cable material comprises a combination of PVC resin, trioctyl trimellitate, vinyl acetate/butyl acrylate copolymer, polyethylene wax, stearic acid, a calcium-zinc composite stabilizer, oxidized polyethylene wax, phosphate flame retardant and dopamine, and the obtained PVC cable material has excellent low-temperature resistance, flame retardance and mechanical property by adding the vinyl acetate/butyl acrylate copolymer and the oxidized polyethylene wax in mutual matching and mutually matching the phosphate flame retardant and the dopamine, and is suitable for the 5G photoelectric integrated cable.
Description
Technical Field
The invention belongs to the technical field of cables, and particularly relates to a PVC cable material for a 5G photoelectric integrated cable, and a preparation method and application thereof.
Background
With the rapid development of economy, various industries are rapidly developed, and all aspects of industry, agriculture, life and the like involve the application of electric power, so that electric wires and cables are indispensable, wherein a PVC cable material is one of the most commonly used cable materials at present.
The traditional PVC cable material is a product prepared by taking PVC resin as a base material, adding a plasticizer (for reducing the processing temperature of the resin and reducing the softening point of the product), a stabilizer (for improving the heat resistance of the product and delaying the degradation of PVC), a lubricant (for improving the processing performance of the product and enabling the material to be easily demoulded and flow), and the like, extruding and plasticizing the mixture by a screw according to a proper proportion, and mixing the mixture together. At present, the main types of plasticizers comprise cold-resistant plasticizers such as dioctyl sebacate and dioctyl adipate, the severe cold resistance of products can be effectively improved, flame retardants such as antimony trioxide and zinc borate are added to improve the flame retardant property of the products, however, the added plasticizers are not good in compatibility with PVC resin, are easy to separate out and seriously affect the flame retardant property, and the lower the addition amount of the flame retardants is, the poorer the cold resistance is caused, so that the current PVC cable material is difficult to have the excellent flame retardant property and the excellent cold resistance.
CN112552616A discloses a flame-retardant PVC cable material, a preparation method and an application thereof. The flame-retardant PVC cable material comprises the following raw material components in parts by weight: 10-30 parts of PVC resin, 40-60 parts of flame retardant, 1-5 parts of compatilizer, 1-3 parts of lubricant and 1-2 parts of silane coupling agent; the flame retardant includes aluminum hydroxide, magnesium hydroxide and antimony-based flame retardants. The preparation method comprises the following steps: (1) Carrying out banburying melting on each component, and then extruding and granulating through an extruder to obtain granules; (2) Extruding the particles obtained in the step (1) by a wire extruder to obtain wires; (3) And (3) carrying out irradiation crosslinking on the wire rod obtained in the step (2) to obtain the flame-retardant PVC cable material. The flame-retardant PVC cable material provided by the invention has good flame retardance, good tensile strength and elongation at break, and can meet the use requirements of building cables. However, the PVC cable material obtained by the invention has poor cold resistance due to the fact that no cold-resistant plasticizer is added.
Therefore, the development of a PVC cable material having both excellent cold resistance and flame retardancy is a technical problem to be solved urgently in the field.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a PVC cable material for a 5G photoelectric integrated cable, and a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a PVC cable material for a 5G photoelectric integrated cable, which comprises the following components in parts by weight:
wherein the trioctyl trimellitate can be in an amount of 12 parts by weight, 14 parts by weight, 16 parts by weight, 18 parts by weight, 20 parts by weight, 22 parts by weight, 24 parts by weight, 26 parts by weight, 28 parts by weight, or the like.
The vinyl acetate/butyl acrylate copolymer may be 15 parts by weight, 20 parts by weight, 25 parts by weight, 30 parts by weight, or the like.
The polyethylene wax may be 0.12 parts by weight, 0.14 parts by weight, 0.16 parts by weight, 0.18 parts by weight, or the like.
The stearic acid may be present at 0.12, 0.14, 0.16, or 0.18 parts by weight, and the like.
The calcium-zinc composite stabilizer may be 2.3 parts by weight, 2.6 parts by weight, 2.9 parts by weight, 3.2 parts by weight, 3.5 parts by weight, 3.8 parts by weight, 4.1 parts by weight, 4.4 parts by weight, 4.7 parts by weight, or the like.
The oxidized polyethylene wax can be 0.02, 0.04, 0.06, 0.08, 0.2, 0.4, 0.6, or 0.8 parts by weight, or the like.
The phosphate flame retardant may be 4.1 parts by weight, 4.2 parts by weight, 4.3 parts by weight, 4.4 parts by weight, 4.5 parts by weight, 4.6 parts by weight, 4.7 parts by weight, 4.8 parts by weight, 4.9 parts by weight, or the like.
The dopamine may be 0.15 parts by weight, 0.2 parts by weight, 0.25 parts by weight, 0.3 parts by weight, 0.35 parts by weight, 0.4 parts by weight, 0.45 parts by weight, or the like.
The PVC cable material for the 5G photoelectric integrated cable comprises a combination of PVC resin, trioctyl trimellitate, a vinyl acetate/butyl acrylate copolymer, polyethylene wax, stearic acid, a calcium-zinc composite stabilizer, oxidized polyethylene wax, a phosphate flame retardant and dopamine in specific parts; the dielectric constant of the PVC cable material can be effectively reduced by adding the trioctyl trimellitate, so that the problem of attenuation of optical cable signals in the cable is effectively reduced; the vinyl acetate/butyl acrylate copolymer can be used as a plasticizer, and simultaneously, the hardness of the product meets the requirement, but the copolymer has a low melting point, and is easy to agglomerate in the processing process, so that the low-temperature resistance of the product is reduced, and the oxidized polyethylene wax with a specific part is added as a plasticizer aid in the design and can be coated on the surface of the vinyl acetate/butyl acrylate copolymer, so that the agglomeration phenomenon of the vinyl acetate/butyl acrylate copolymer in the processing process can be effectively prevented, and the cold resistance of the product is improved; meanwhile, the polyethylene wax and the stearic acid are added in a matching way to improve the internal and external lubricating performance of the product; and finally, a phosphate flame retardant and dopamine are added for matching, the dopamine can form a polydopamine coating which is included on the surface of the phosphate flame retardant, the compatibility of the phosphate flame retardant and a PVC resin matrix is enhanced, the formed polydopamine coating also has excellent flame retardance, and can generate a synergistic effect with the phosphate flame retardant to further enhance the flame retardance of a product, so that the product has excellent flame retardance under the condition of low addition of the flame retardant, the low-temperature resistance of the product is further improved, and finally, the PVC cable material with excellent flame retardance and low-temperature property, low dielectric constant and high hardness is obtained.
Preferably, the degree of polymerization of the PVC resin is not less than 1300, such as 1400, 1500, 1600, 1700, 1800, 1900, 2000, or the like.
Preferably, the phosphate flame retardant comprises any one of triphenyl phosphate, tricresyl phosphate or triethyl phosphate or a combination of at least two of the foregoing, and more preferably triphenyl phosphate.
Preferably, the PVC cable material also comprises calcium carbonate.
Preferably, the content of calcium carbonate in the PVC cable material is 0 to 30 parts by weight and not equal to 0, such as 5 parts by weight, 10 parts by weight, 15 parts by weight, 20 parts by weight or 25 parts by weight.
Preferably, the calcium carbonate has a mesh size of not less than 2500, e.g., 2700, 2900, 3100, 3300, 3500, 3700, 3900, or the like.
Preferably, the PVC cable material further comprises hydrotalcite.
As a preferred technical scheme of the invention, the hydrotalcite is added into the PVC cable material to be matched with trioctyl trimellitate so as to further reduce the dielectric constant of the product.
Preferably, the content of the hydrotalcite in the PVC cable material is 0 to 10 parts by weight and not equal to 0, such as 2 parts by weight, 4 parts by weight, 6 parts by weight, 8 parts by weight, or the like.
In a second aspect, the present invention provides a method for preparing the PVC cable material according to the first aspect, the method comprising the following steps:
(1) Mixing oxidized polyethylene wax and a vinyl acetate/butyl acrylate copolymer to obtain a premix A; mixing dopamine and phosphate flame retardant in water to obtain a premix B;
(2) Mixing the premix A obtained in the step (1) with PVC resin to obtain a mixture;
(3) Extruding the mixture obtained in the step (2), polyethylene wax, stearic acid, calcium-zinc composite stabilizer, the premix B obtained in the step (1), optionally calcium carbonate and optionally hydrotalcite to obtain the PVC cable material.
Preferably, the mixing temperature for mixing the oxidized polyethylene wax and the vinyl acetate/butyl acrylate copolymer in the step (1) is 70 to 90 ℃, such as 72 ℃, 74 ℃, 76 ℃, 78 ℃, 80 ℃, 82 ℃, 84 ℃, 86 ℃ or 88 ℃, etc.
Preferably, the mixing time of the oxidized polyethylene wax and the vinyl acetate/butyl acrylate copolymer in the step (1) is 3-5 min, such as 3.2min, 3.4min, 3.6min, 3.8min, 4min, 4.2min, 4.4min, 4.6min or 4.8 min.
Preferably, the mixing temperature of the dopamine and phosphate flame retardant mixed in the water in the step (1) is normal temperature.
Preferably, the mixing of dopamine and phosphate flame retardant in water in the step (1) is carried out under alkaline conditions.
Preferably, the dopamine and phosphate flame retardant in step (1) is mixed in water for 0.5-1.5 h, such as 0.7h, 0.9h, 1.1h or 1.3 h.
Preferably, the mixing of step (2) is carried out in a high speed mixer.
Preferably, the mixing time in step (2) is 1-3 min, such as 1.2min, 1.4min, 1.6min, 1.8min, 2min, 2.2min, 2.4min, 2.6min, 2.8min, etc.
Preferably, the temperature of the mixing in step (2) is 50 to 70 ℃, such as 52 ℃, 54 ℃, 56 ℃, 58 ℃, 60 ℃, 62 ℃, 64 ℃, 66 ℃ or 68 ℃ and the like.
Preferably, the extrusion of step (3) is carried out in a twin-screw extruder.
In a third aspect, the invention provides an application of the PVC cable material in the first aspect in a 5G optical-electrical integrated cable.
Compared with the prior art, the invention has the following beneficial effects:
(1) The PVC cable material for the 5G photoelectric integrated cable comprises a combination of PVC resin, trioctyl trimellitate, vinyl acetate/butyl acrylate copolymer, polyethylene wax, stearic acid, a calcium-zinc composite stabilizer, oxidized polyethylene wax, a phosphate flame retardant and dopamine, and the obtained PVC cable material has excellent low temperature resistance, flame retardance and mechanical property by adding the vinyl acetate/butyl acrylate copolymer and the oxidized polyethylene wax in mutual matching and adding the phosphate flame retardant and the dopamine in mutual matching, so that the PVC cable material is suitable for the 5G photoelectric integrated cable.
(2) Specifically, the PVC cable material provided by the invention has the elongation at break of 251-315%, the tensile strength of 21.3-25 MPa and the density of 1.32-1.41 g/cm 3 Volume resistivity of 4.2X 10 10 ～6.1×10 10 Omega.m, a dielectric constant of 3.2 to 3.8C 2 /(N·M 2 ) The low-temperature impact is-46 to-21 ℃, and the hardness is 90 to 96A.
Detailed Description
The technical solution of the present invention is further described below by way of specific embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
The detailed information of the raw materials according to the embodiments of the present invention is shown in table 1:
TABLE 1
Example 1
A PVC cable material for a 5G photoelectric integrated cable comprises the following components in parts by weight:
the preparation method of the PVC cable material provided by this embodiment includes the following steps:
(1) Mixing oxidized polyethylene wax and vinyl acetate/butyl acrylate copolymer at 80 ℃ for 4min to obtain a premix A; mixing dopamine and triphenyl phosphate in an alkaline aqueous solution (solute is sodium hydroxide) with the pH value of 8 for 1h at normal temperature to obtain a premix B;
(2) Mixing the premix A obtained in the step (1) and PVC resin in a high-speed mixer for 2min at the mixing temperature of 60 ℃ to obtain a mixture;
(3) And (3) further mixing the mixture obtained in the step (2), polyethylene wax, stearic acid and calcium zinc composite stabilizer, the premix B obtained in the step (1), calcium carbonate (with the mesh number of 2500) and hydrotalcite in a double-screw extruder, extruding and maturing, and feeding into a single-screw granulator for granulation to obtain the PVC cable material.
Example 2
A PVC cable material for a 5G photoelectric integrated cable comprises the following components in parts by weight:
the preparation method of the PVC cable material provided by this embodiment includes the following steps:
(1) Mixing oxidized polyethylene wax and vinyl acetate/butyl acrylate copolymer at 70 ℃ for 5min to obtain a premix A; mixing dopamine and triphenyl phosphate in an alkaline aqueous solution (the solute is sodium hydroxide) with the pH value of 8 for 1h at normal temperature to obtain a premix B;
(2) Mixing the premix A obtained in the step (1) and PVC resin in a high-speed mixer for 1min, wherein the mixing temperature is 70 ℃, and obtaining a mixture;
(3) And (3) further mixing and extruding the mixture obtained in the step (2), polyethylene wax, stearic acid and calcium zinc composite stabilizer, the premix B obtained in the step (1), calcium carbonate (with the mesh number of 2500) and hydrotalcite in a double-screw extruder for maturation, and feeding the mixture into a single-screw granulator for granulation to obtain the PVC cable material.
Example 3
A PVC cable material for a 5G photoelectric integrated cable comprises the following components in parts by weight:
the preparation method of the PVC cable material provided by this embodiment includes the following steps:
(1) Mixing oxidized polyethylene wax and vinyl acetate/butyl acrylate copolymer at 80 ℃ for 3min to obtain a premix A; mixing dopamine and triphenyl phosphate in an alkaline aqueous solution (solute is sodium hydroxide) with the pH value of 8 for 1h at normal temperature to obtain a premix B;
(2) Mixing the premix A obtained in the step (1) and PVC resin in a high-speed mixer for 3min at the mixing temperature of 50 ℃ to obtain a mixture;
(3) And (3) further mixing the mixture obtained in the step (2), polyethylene wax, stearic acid and calcium zinc composite stabilizer, the premix B obtained in the step (1), calcium carbonate (with the mesh number of 2500) and hydrotalcite in a double-screw extruder, extruding and maturing, and feeding into a single-screw granulator for granulation to obtain the PVC cable material.
Example 4
A PVC cable material for a 5G photoelectric integrated cable is only different from that in example 1 in that no hydrotalcite is added, the addition amount of trioctyl trimellitate is 25 parts by weight, and other components, the use amount and the preparation method are the same as those in example 1.
Example 5
A PVC cable material for a 5G photoelectric integrated cable is different from that of example 1 only in that calcium carbonate is not added, and other components, the using amount and the preparation method are the same as those of example 1.
Comparative example 1
A PVC cable material for a 5G photoelectric integrated cable only differs from example 1 in that dopamine is not added, and other components, the using amount and the preparation method are the same as those of example 1.
Comparative example 2
A PVC cable material for a 5G photoelectric integrated cable is only different from that in example 1 in that triphenyl phosphate is not added, and other components, the using amount and the preparation method are the same as those in example 1.
Comparative example 3
A PVC cable material for a 5G photoelectric integrated cable is different from that in example 1 only in that oxidized polyethylene wax is not added, and other components, the using amount and the preparation method are the same as those in example 1.
Comparative example 4
A PVC cable material for a 5G photoelectric integrated cable is different from the PVC cable material in example 1 only in that a vinyl acetate/butyl acrylate copolymer is not added, and other components, the using amount and the preparation method are the same as those in example 1.
Comparative example 5
A PVC cable material for a 5G photoelectric integrated cable is different from that in example 1 only in that a calcium-zinc composite stabilizer is not added, and other components, the using amount and the preparation method are the same as those in example 1.
And (3) performance testing:
(1) Elongation at break and tensile strength: testing according to a testing method provided by GB/T1040.3-2006;
(2) Density: testing according to a testing method provided by GB/T1033.1-2008;
(3) Volume resistivity: testing according to a testing method provided by GB/T31838.2-2019;
(4) Dielectric constant: testing according to a testing method provided in GB/T11297.11-2015;
(5) Low-temperature impact: testing according to a testing method provided by GB/T5470-1985;
(6) Hardness: the test is carried out according to the test method provided by GB/T2411-2008.
The PVC cable materials provided in examples 1 to 5 and comparative examples 1 to 5 were tested according to the above test method, and the test results are shown in table 2:
TABLE 2
As can be seen from the data in table 2: the PVC cable material provided by the invention has higher elongation at break, higher tensile strength and higher volume resistivity, and specifically, the PVC cable material obtained in examples 1 to 3 has the elongation at break of 251 to 315 percent and the tensile strength of 21.3E25MPa, density of 1.32-1.41 g/cm 3 Volume resistivity of 4.2X 10 10 ～6.1×10 10 Omega.m, a dielectric constant of 3.2 to 3.8C 2 /(N·M 2 ) The low-temperature impact is-46 to-21 ℃, and the hardness is 90 to 96A.
Comparing the data of example 1 and comparative examples 1 and 2, it can be seen that the volume resistivity of the PVC cable material without dopamine or triphenyl phosphate is low and the insulation is poor.
Comparing the data of example 1 and comparative examples 3 to 4, it can be seen that the PVC cable material obtained without the oxidized polyethylene wax or without the vinyl acetate/butyl acrylate copolymer has reduced hardness and low temperature impact properties.
The data of comparative example 1 and example 5 also show that the overall performance of the PVC cable material is reduced without adding the calcium-zinc composite stabilizer.
Finally, comparing the data of example 1 and examples 4 to 5, it can be seen that the mechanical properties of the finally obtained PVC cable material are also affected by the hydrotalcite and the calcium carbonate.
The applicant states that the invention is described in the above embodiments as a PVC cable material for a 5G optical-electrical integrated cable, and a preparation method and application thereof, but the invention is not limited to the above embodiments, that is, the invention is not limited to the above embodiments. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. The PVC cable material for the 5G photoelectric integrated cable is characterized by comprising the following components in parts by weight:
2. the PVC cable material according to claim 1, wherein the degree of polymerization of the PVC resin is not less than 1300.
3. The PVC cable material according to claim 1 or 2, wherein the phosphate-based flame retardant comprises any one or a combination of at least two of triphenyl phosphate, tricresyl phosphate or triethyl phosphate, preferably triphenyl phosphate.
4. The PVC cable material according to any one of claims 1 to 3, further comprising calcium carbonate;
preferably, the content of calcium carbonate in the PVC cable material is 0-30 parts by weight and is not equal to 0;
preferably, the mesh number of the calcium carbonate is not less than 2500.
5. The PVC cable material according to any one of claims 1 to 4, wherein the PVC cable material further comprises hydrotalcite;
preferably, the content of the hydrotalcite in the PVC cable material is 0-10 parts by weight and is not equal to 0.
6. A process for the preparation of PVC cable material according to any of claims 1 to 5, characterized in that it comprises the following steps:
(1) Mixing oxidized polyethylene wax and vinyl acetate/butyl acrylate copolymer to obtain a premix A; mixing dopamine and phosphate flame retardant in water to obtain a premix B;
(2) Mixing the premix A obtained in the step (1) with PVC resin to obtain a mixture;
(3) And (3) extruding the mixture obtained in the step (2), polyethylene wax, stearic acid, calcium-zinc composite stabilizer, the premix B obtained in the step (1), optionally calcium carbonate and optionally hydrotalcite to obtain the PVC cable material.
7. The method according to claim 6, wherein the mixing temperature of the oxidized polyethylene wax and the vinyl acetate/butyl acrylate copolymer in the step (1) is 70 to 90 ℃;
preferably, the mixing time of the oxidized polyethylene wax and the vinyl acetate/butyl acrylate copolymer in the step (1) is 3-5 min.
8. The preparation method according to claim 6 or 7, wherein the mixing temperature of mixing the dopamine and the phosphate flame retardant in the water in the step (1) is normal temperature;
preferably, the mixing of dopamine and phosphate flame retardant in water in step (1) is carried out under alkaline conditions;
preferably, the mixing time of the dopamine and the phosphate flame retardant in the step (1) in water is 0.5-1.5 h.
9. The production method according to any one of claims 6 to 7, wherein the mixing in step (2) is performed in a high-speed mixer;
preferably, the mixing time of the step (2) is 1-3 min;
preferably, the temperature of the mixing in the step (2) is 50-70 ℃;
preferably, the extruding of step (3) is performed in a twin screw extruder.
10. The application of the PVC cable material as defined in any one of claims 1 to 5 in a 5G optical-electrical integrated cable.
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