CN116003934A - Aging-resistant insulated cable material and preparation method thereof - Google Patents
Aging-resistant insulated cable material and preparation method thereof Download PDFInfo
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- CN116003934A CN116003934A CN202211403807.0A CN202211403807A CN116003934A CN 116003934 A CN116003934 A CN 116003934A CN 202211403807 A CN202211403807 A CN 202211403807A CN 116003934 A CN116003934 A CN 116003934A
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Abstract
The invention relates to the technical field of cable materials, in particular to an aging-resistant insulated cable material and a preparation method thereof, wherein the aging-resistant insulated cable material comprises the following components in parts by weight: 70-90 parts of polyvinyl chloride resin, 30-40 parts of isobutylene-maleic anhydride copolymer, 5-12 parts of heat stabilizer, 10-20 parts of plasticizer, 0.5-1.5 parts of antioxidant A, 0.5-1.5 parts of antioxidant B, 0.2-0.8 part of lubricant and 5-10 parts of inorganic filler. The preparation method comprises the following steps: 1) Weighing all raw materials according to parts by weight, and uniformly mixing all raw materials at the rotation speed of 500-800 rpm and the temperature of 90-110 ℃ to obtain a mixture; 2) Mixing the cooled mixture by using a double-screw extruder of a double-stage granulator set; 3) And extruding the obtained material by a single screw of a double-stage granulator set to form particles after mixing, so as to obtain the ageing-resistant insulated cable material. According to the invention, the ageing resistance of the polyvinyl chloride cable material is improved by adding the isobutene-maleic anhydride copolymer and simultaneously adding the composite antioxidant and other additive components.
Description
Technical Field
The invention relates to the technical field of cable materials, in particular to an aging-resistant insulated cable material and a preparation method thereof.
Background
The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.
The plastic for wire and cable insulation and sheath is commonly called cable material, and the wire and cable products almost need insulating layer openings except bare wire products such as steel-cored aluminum stranded wires, electromagnetic wires and the like, so the demand of the cable material is very large. Aging can occur due to various reasons in the use process of the cable material, the service life of the cable material is influenced, and the cable aging reasons are as follows: long term overload operation, because of the thermoelectric effect of the amount of current, increases the cable temperature, and excessive temperatures can accelerate the aging of the insulation, so that the insulation is penetrated; damage due to external force; insulating and damping; chemical corrosion, leading to ineffective protective layers and reduced insulation; common faults of the cable connector; the natural environment and temperature, the external natural environment and pyrogen where the cable is located, can also cause the cable to be too hot, to penetrate through insulation, or even to catch fire from explosion.
The cable material commonly used in the prior art mostly uses polyvinyl chloride materials or rubber and the like as main materials, and the polyvinyl chloride materials have good mechanical and physical properties, flexibility and chemical reagent resistance, are low in price, and are good raw materials of the cable material. However, the ageing resistance of the cable material using the polyethylene material as the raw material in the prior art is often insufficient, and an anti-aging agent is generally required to be added to improve the ageing resistance of the cable material, but the addition amount of the anti-aging agent is not without an upper limit, and the service life of the cable material is also affected by adding a large amount of the anti-aging agent into the cable material. The inventors have thus found that there is a need for a more efficient process for preparing cable materials with good ageing resistance.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an ageing-resistant insulated cable material and a preparation method thereof, wherein the ageing-resistant performance of polyvinyl chloride resin is improved by adding an isobutylene-maleic anhydride copolymer, and the ageing resistance of the polyvinyl chloride cable material is enhanced by adding a composite antioxidant and other additive components.
In order to achieve the above object, the technical scheme of the present invention is as follows:
in a first aspect of the invention, the invention provides an aging-resistant insulated cable material, which comprises the following components in parts by weight: 70-90 parts of polyvinyl chloride resin, 30-40 parts of isobutylene-maleic anhydride copolymer, 5-12 parts of heat stabilizer, 10-20 parts of plasticizer, 0.5-1.5 parts of antioxidant A, 0.5-1.5 parts of antioxidant B, 0.2-0.8 part of lubricant and 5-10 parts of inorganic filler.
In one or more embodiments, the polyvinyl chloride resin has a degree of polymerization greater than 1200;
the isobutylene-maleic anhydride copolymer is an alternating copolymer of isobutylene and maleic anhydride, the molar ratio of isobutylene to maleic anhydride monomers being 1:1. preferably, the weight average molecular weight of the isobutylene-maleic anhydride copolymer is 30000-80000.
In one or more embodiments, the heat stabilizer is selected from the group consisting of: one or more of a calcium zinc stabilizer, a fatty acid soap, a phosphite and an epoxide;
the heat stabilizer is selected from calcium-zinc stabilizer; the addition of the heat stabilizer can prevent or delay the thermal degradation of the polyvinyl chloride, enhance the thermal stability of the cable material and delay the aging of the cable material.
In one or more embodiments, the plasticizer is selected from the group consisting of: one or more of 4-dipalmitoyl proline DPHP, diisononyl phthalate DINP, dioctyl phthalate DOP, diisodecyl phthalate DIDP, trioctyl trimellitate TOTM, dioctyl terephthalate DOTP, dioctyl adipate DOA and epoxidized soybean oil ESO;
the plasticizer is one or more selected from diisononyl phthalate DINP, diisodecyl phthalate DIDP, trioctyl trimellitate TOTM and dioctyl terephthalate DOTP.
The diisononyl phthalate DINP has good heat resistance as a plasticizer; diisodecyl phthalate DIDP is particularly suitable for being used as a plasticizer for resin or plastic materials with high heat resistance or insulation requirements, has low toxicity, and belongs to an environment-friendly plasticizer; trioctyl trimellitate TOTM is a heat-resistant and durable primary plasticizer; dioctyl terephthalate (DOTP) is a primary plasticizer with excellent performance for polyvinyl chloride plastics, and has the advantages of heat resistance, cold resistance, difficult volatilization, extraction resistance, good flexibility, good electrical insulation performance and the like compared with diisooctyl phthalate (DOP). The combination of the plasticizers selected in the invention not only can soften the material and increase the flexibility of the material so as to facilitate the processing, but also can enhance the heat resistance of the cable material and further enhance the ageing resistance of the cable material.
In one or more embodiments, the antioxidant a is a complex antioxidant B225;
in one or more embodiments, the antioxidant B is a composition of an antioxidant 1010 and an antioxidant 1076, wherein the weight ratio of the antioxidant 1010 to the antioxidant 1076 is 1-3: 1.
the weight ratio of antioxidant 1010 to antioxidant 1076 is 2:1.
the antioxidant is added as a general means for enhancing the ageing resistance of the cable material, the invention discovers that the performance of the antioxidant can be further enhanced by adding the combined antioxidant, and the antioxidant combination can be compounded with other components in the cable material to obtain the cable material with better ageing resistance.
In one or more embodiments, the lubricant is selected from the group consisting of: one or more of calcium stearate, paraffin wax, PE wax and pentaerythritol stearate. The addition of the lubricant can improve the fluidity of the cable material during processing and promote melting, so that the dispersibility of the additive components in the cable material can be enhanced and the performances of the cable material in all aspects can be improved.
In one or more embodiments, the inorganic filler is nano-sized calcium carbonate.
The anti-aging insulating cable material is characterized in that an isobutylene-maleic anhydride copolymer is added to modify polyvinyl chloride resin on the basis of adding the antioxidant, the isobutylene-maleic anhydride copolymer is an amphoteric polymer which keeps better elasticity, heat resistance, light resistance and oxidation resistance of polyisobutylene, and the combination of the isobutylene-maleic anhydride copolymer serving as a chain extender and the polyvinyl chloride resin enhances the heat stability and oxidation resistance of the polyvinyl chloride, so that the ageing resistance of the cable material is further improved.
The inorganic filler nano calcium carbonate is added to modify the cable material, the inorganic filler is doped to improve the thermal oxidative aging performance of the cable material, but the poor dispersibility of the inorganic filler in the cable material often affects the aging resistance and stability of the cable material, and the added isobutylene-maleic anhydride copolymer modifies the polyvinyl chloride resin and simultaneously can enhance the dispersibility of the inorganic filler in the cable material, so that the aging resistance of the cable material is further enhanced.
In one or more embodiments, the aging-resistant insulated cable material comprises the following components in parts by weight: 70-90 parts of polyvinyl chloride resin, 30-40 parts of isobutene-maleic anhydride copolymer, 5-12 parts of calcium-zinc stabilizer, 10-20 parts of plasticizer, 0.5-1.5 parts of compound antioxidant B225, 0.5-1.5 parts of antioxidant 1010 and antioxidant 1076, wherein the weight ratio of the antioxidant 1010 to the antioxidant 1076 is 1-3: 1, 0.2-0.8 part of calcium stearate and 5-10 parts of nano calcium carbonate.
In a second aspect of the present invention, the present invention provides a method for preparing the aging-resistant insulated cable material according to the first aspect, the method comprising the steps of:
1) Weighing all raw materials according to parts by weight, and uniformly mixing all raw materials at the rotation speed of 500-800 rpm and the temperature of 90-110 ℃ to obtain a mixture;
2) Mixing the cooled mixture by using a double-screw extruder of a double-stage granulator set;
3) And extruding the obtained material by a single screw of a double-stage granulator set to form particles after mixing, so as to obtain the ageing-resistant insulated cable material.
In one or more embodiments, in the step 2), the screw speed is 300-350 rpm, and the mixing temperature is controlled to be 160-170 ℃;
in one or more embodiments, the screw speed in step 3) is 35 to 45 revolutions per minute, and the temperature is controlled to be 120 to 130 ℃.
The specific embodiment of the invention has the following beneficial effects:
compared with a single antioxidant, the antioxidant performance of the cable material can be further enhanced by the combination of the antioxidants added in the anti-aging insulating cable material and the preparation method of the anti-aging insulating cable material, and the cable material with better anti-aging performance can be obtained by compounding the combination of the antioxidants with other components in the cable material.
According to the ageing-resistant insulated cable material, on the basis of adding the antioxidant composition, the isobutylene-maleic anhydride copolymer is added to modify the polyvinyl chloride resin, and the isobutylene-maleic anhydride copolymer serving as a chain extender is combined with the polyvinyl chloride resin to enhance the thermal stability and oxidation resistance of the polyvinyl chloride, so that the ageing resistance of the cable material is further improved.
According to the invention, the inorganic filler is added to modify the cable material, the thermal oxidative aging performance of the cable material can be improved by doping the inorganic filler, and the added isobutylene-maleic anhydride copolymer can be used for modifying the polyvinyl chloride resin and enhancing the dispersibility of the inorganic filler in the cable material, so that the aging resistance of the cable material is further enhanced.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The invention will be further illustrated with reference to specific examples.
Example 1
An aging-resistant insulated cable material comprises the following components in parts by weight: 70 parts of polyvinyl chloride resin, 30 parts of isobutene-maleic anhydride copolymer, 5 parts of calcium zinc stabilizer, 6 parts of dioctyl terephthalate DOTP, 4 parts of diisononyl phthalate DINP, 0.5 part of composite antioxidant B225, 0.25 part of antioxidant 1010, 0.25 part of antioxidant 1076, 0.2 part of calcium stearate and 5 parts of nano-sized calcium carbonate.
The preparation method of the aging-resistant insulated cable material comprises the following steps:
1) Weighing all raw materials according to parts by weight, and uniformly mixing all raw materials under the conditions of 500 revolutions per minute and 90 ℃ to obtain a mixture;
2) Mixing the cooled mixture by using a double-screw extruder of a double-stage granulator set, wherein the rotating speed of a screw is 300-350 r/min, and the mixing temperature is controlled at 160 ℃;
3) And extruding the obtained material into particles by a single screw of a double-stage granulator set after mixing, wherein the rotating speed of the screw is 35-45 rpm, and the temperature is controlled at 120 ℃ to obtain the aging-resistant insulated cable material.
Example 2
An aging-resistant insulated cable material comprises the following components in parts by weight: 80 parts of polyvinyl chloride resin, 35 parts of isobutene-maleic anhydride copolymer, 6 parts of calcium zinc stabilizer, 8 parts of dioctyl terephthalate DOTP, 4 parts of diisononyl phthalate DINP and 3 parts of diisodecyl phthalate DIDP; 225 parts of composite antioxidant B, 0.6 part of antioxidant 1010, 0.3 part of antioxidant 1076, 0.4 part of calcium stearate and 6 parts of nano-grade calcium carbonate.
The preparation method of the aging-resistant insulated cable material comprises the following steps:
1) Weighing all raw materials according to parts by weight, and uniformly mixing all raw materials at the rotating speed of 600 rpm and the temperature of 100 ℃ to obtain a mixture;
2) Mixing the cooled mixture by using a double-screw extruder of a double-stage granulator set, wherein the rotating speed of a screw is 320 revolutions per minute, and the mixing temperature is controlled at 165 ℃;
3) And extruding the obtained material into particles by a single screw of a double-stage granulator set after mixing, wherein the rotating speed of the screw is 38 revolutions per minute, and the temperature is controlled at 125 ℃ to obtain the ageing-resistant insulated cable material.
Example 3
An aging-resistant insulated cable material comprises the following components in parts by weight: 90 parts of polyvinyl chloride resin, 40 parts of isobutene-maleic anhydride copolymer, 8 parts of calcium zinc stabilizer, 10 parts of dioctyl terephthalate DOTP, 4 parts of diisononyl phthalate DINP, 3 parts of diisodecyl phthalate DIDP, 3 parts of trioctyl trimellitate TOTM, 1.5 parts of composite antioxidant B, 1.5 parts of antioxidant B (antioxidant 1010.8 parts and antioxidant 1076.4 parts, 0.6 part of calcium stearate and 8 parts of nano-sized calcium carbonate.
The preparation method of the aging-resistant insulated cable material comprises the following steps:
1) Weighing all raw materials according to parts by weight, and uniformly mixing all raw materials at the rotation speed of 700 rpm and the temperature of 105 ℃ to obtain a mixture;
2) Mixing the cooled mixture by using a double-screw extruder of a double-stage granulator set, wherein the rotating speed of a screw is 340 revolutions per minute, and the mixing temperature is controlled at 168 ℃;
3) And extruding the obtained material into particles by a single screw of a double-stage granulator set after mixing, wherein the rotating speed of the screw is 45 revolutions per minute, and the temperature is controlled at 128 ℃ to obtain the aging-resistant insulated cable material.
Example 4
An aging-resistant insulated cable material comprises the following components in parts by weight: 85 parts of polyvinyl chloride resin, 35 parts of isobutene-maleic anhydride copolymer, 10 parts of calcium zinc stabilizer, 8 parts of dioctyl terephthalate DOTP, 3 parts of diisononyl phthalate DINP, 2 parts of diisodecyl phthalate DIDP, 2 parts of trioctyl trimellitate TOTM, 1.2 parts of composite antioxidant B225, 0.9 part of antioxidant 1010, 0.45 part of antioxidant 1076, 0.6 part of calcium stearate and 6 parts of nano-sized calcium carbonate.
The preparation method of the aging-resistant insulated cable material comprises the following steps:
1) Weighing all raw materials according to parts by weight, and uniformly mixing all raw materials at the rotation speed of 800 rpm and the temperature of 100 ℃ to obtain a mixture;
2) Mixing the cooled mixture by using a double-screw extruder of a double-stage granulator set, wherein the rotating speed of a screw is 350 revolutions per minute, and the mixing temperature is controlled at 170 ℃;
3) And extruding the obtained material into particles by a single screw of a double-stage granulator set after mixing, wherein the rotating speed of the screw is 45 revolutions per minute, and the temperature is controlled at 130 ℃ to obtain the aging-resistant insulated cable material.
Comparative example 1
An aging-resistant insulated cable material comprises the following components in parts by weight: 120 parts of polyvinyl chloride resin, 10 parts of calcium-zinc stabilizer, 8 parts of dioctyl terephthalate DOTP, 3 parts of diisononyl phthalate DINP, 2 parts of diisodecyl phthalate DIDP, 2 parts of trioctyl trimellitate TOTM, 1.2 parts of composite antioxidant B225, 0.9 part of antioxidant 1010, 0.45 part of antioxidant 1076, 0.6 part of calcium stearate and 6 parts of nano-sized calcium carbonate.
The preparation method of the aging-resistant insulated cable material comprises the following steps:
1) Weighing all raw materials according to parts by weight, and uniformly mixing all raw materials at the rotation speed of 800 rpm and the temperature of 100 ℃ to obtain a mixture;
2) Mixing the cooled mixture by using a double-screw extruder of a double-stage granulator set, wherein the rotating speed of a screw is 350 revolutions per minute, and the mixing temperature is controlled at 170 ℃;
3) And extruding the obtained material into particles by a single screw of a double-stage granulator set after mixing, wherein the rotating speed of the screw is 45 revolutions per minute, and the temperature is controlled at 130 ℃ to obtain the aging-resistant insulated cable material.
The main difference between the ageing-resistant insulated cable material provided in comparative example 1 and example 4 is that no isobutylene-maleic anhydride copolymer is added.
Comparative example 2:
an aging-resistant insulated cable material comprises the following components in parts by weight: 85 parts of polyvinyl chloride resin, 35 parts of isobutene-maleic anhydride copolymer, 10 parts of calcium zinc stabilizer, 8 parts of dioctyl terephthalate DOTP, 3 parts of diisononyl phthalate DINP, 2 parts of diisodecyl phthalate DIDP, 2 parts of trioctyl trimellitate TOTM, 2 parts of composite antioxidant B, 0.6 part of calcium stearate and 6 parts of nano-sized calcium carbonate.
The preparation method of the aging-resistant insulated cable material comprises the following steps:
1) Weighing all raw materials according to parts by weight, and uniformly mixing all raw materials at the rotation speed of 800 rpm and the temperature of 100 ℃ to obtain a mixture;
2) Mixing the cooled mixture by using a double-screw extruder of a double-stage granulator set, wherein the rotating speed of a screw is 350 revolutions per minute, and the mixing temperature is controlled at 170 ℃;
3) And extruding the obtained material into particles by a single screw of a double-stage granulator set after mixing, wherein the rotating speed of the screw is 45 revolutions per minute, and the temperature is controlled at 130 ℃ to obtain the aging-resistant insulated cable material.
The main difference between the ageing-resistant insulated cable material provided in comparative example 2 and example 4 is the different antioxidants added.
Comparative example 3
An aging-resistant insulated cable material comprises the following components in parts by weight: 85 parts of polyvinyl chloride resin, 35 parts of isobutene-maleic anhydride copolymer, 10 parts of calcium zinc stabilizer, 8 parts of dioctyl terephthalate DOTP, 3 parts of diisononyl phthalate DINP, 2 parts of diisodecyl phthalate DIDP, 2 parts of trioctyl trimellitate TOTM, 1.6 parts of antioxidant 1010 and 0.8 part of antioxidant 1076, 0.6 part of calcium stearate and 6 parts of nano-sized calcium carbonate.
The preparation method of the aging-resistant insulated cable material comprises the following steps:
1) Weighing all raw materials according to parts by weight, and uniformly mixing all raw materials at the rotation speed of 800 rpm and the temperature of 100 ℃ to obtain a mixture;
2) Mixing the cooled mixture by using a double-screw extruder of a double-stage granulator set, wherein the rotating speed of a screw is 350 revolutions per minute, and the mixing temperature is controlled at 170 ℃;
3) And extruding the obtained material into particles by a single screw of a double-stage granulator set after mixing, wherein the rotating speed of the screw is 45 revolutions per minute, and the temperature is controlled at 130 ℃ to obtain the aging-resistant insulated cable material.
The main difference between the ageing-resistant insulated cable material provided in comparative example 3 and example 4 is the different antioxidants added.
Comparative example 4
An aging-resistant insulated cable material comprises the following components in parts by weight: 85 parts of polyvinyl chloride resin, 35 parts of isobutene-maleic anhydride copolymer, 10 parts of calcium zinc stabilizer, 8 parts of dioctyl terephthalate DOTP, 4 parts of dioctyl adipate DOA, 3 parts of epoxidized soybean oil ESO, 1.2 parts of composite antioxidant B, 0.9 part of antioxidant 1010, 0.45 part of antioxidant 1076, 0.6 part of calcium stearate and 6 parts of nano-sized calcium carbonate.
The preparation method of the aging-resistant insulated cable material comprises the following steps:
1) Weighing all raw materials according to parts by weight, and uniformly mixing all raw materials at the rotation speed of 800 rpm and the temperature of 100 ℃ to obtain a mixture;
2) Mixing the cooled mixture by using a double-screw extruder of a double-stage granulator set, wherein the rotating speed of a screw is 350 revolutions per minute, and the mixing temperature is controlled at 170 ℃;
3) And extruding the obtained material into particles by a single screw of a double-stage granulator set after mixing, wherein the rotating speed of the screw is 45 revolutions per minute, and the temperature is controlled at 130 ℃ to obtain the aging-resistant insulated cable material.
The main difference between the ageing-resistant insulated cable material provided in comparative example 3 and example 4 is the different plasticizers added.
The aging-resistant insulating cable materials prepared in examples 1 to 4 and comparative examples 1 to 4 were subjected to performance test on aging-resistant performance and tensile properties by referring to GB/T2915-2008 general test method for insulation and sheathing materials for cables and optical cables, and the aging-resistant performance test conditions were 136 ℃ multiplied by 168 h. The tensile strength change rate/% and the elongation at break change rate/% of the aging-resistant insulated cable materials prepared in examples 1 to 4 and comparative examples 1 to 4 under this test condition are shown in table 1.
TABLE 1
As can be seen from Table 1, after the ageing-resistant insulated cable materials prepared in examples 1 to 4 of the invention are aged, the tensile strength and the tensile elongation at break are reduced to a smaller extent, and the ageing-resistant performance is better; the comparative examples 1-4 have larger tensile strength and tensile elongation at break reduction after hot air aging, which indicates that the combination of the cable materials in the embodiment of the invention can obviously enhance the ageing resistance of the cable materials.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The aging-resistant insulated cable material is characterized by comprising the following components in parts by weight:
70-90 parts of polyvinyl chloride resin, 30-40 parts of isobutylene-maleic anhydride copolymer, 5-12 parts of heat stabilizer, 10-20 parts of plasticizer, 0.5-1.5 parts of antioxidant A, 0.5-1.5 parts of antioxidant B, 0.2-0.8 part of lubricant and 5-10 parts of inorganic filler.
2. The aging-resistant insulated cable material of claim 1, wherein the polyvinyl chloride resin has a degree of polymerization of greater than 1200; the isobutylene-maleic anhydride copolymer is an alternating copolymer of isobutylene and maleic anhydride, the molar ratio of isobutylene to maleic anhydride monomers being 1:1.
3. the aging-resistant insulated cable material as recited in claim 1, wherein the heat stabilizer is selected from the group consisting of: one or more of a calcium zinc stabilizer, a fatty acid soap, a phosphite and an epoxide;
the heat stabilizer is selected from calcium-zinc stabilizers.
4. The aging-resistant insulated cable material as recited in claim 1, wherein the plasticizer is selected from the group consisting of: one or more of 4-dipalmitoyl proline DPHP, diisononyl phthalate DINP, dioctyl phthalate DOP, diisodecyl phthalate DIDP, trioctyl trimellitate TOTM, dioctyl terephthalate DOTP, dioctyl adipate DOA and epoxidized soybean oil ESO;
the plasticizer is one or more selected from diisononyl phthalate DINP, diisodecyl phthalate DIDP, trioctyl trimellitate TOTM and dioctyl terephthalate DOTP.
5. The aging-resistant insulated cable material according to claim 4, wherein the antioxidant A is a composite antioxidant B225;
the antioxidant B is a composition of an antioxidant 1010 and an antioxidant 1076, wherein the weight ratio of the antioxidant 1010 to the antioxidant 1076 is 1-3: 1, a step of;
the weight ratio of antioxidant 1010 to antioxidant 1076 is 2:1.
6. the aging-resistant insulated cable material as recited in claim 1, wherein the lubricant is selected from the group consisting of: one or more of calcium stearate, paraffin wax, PE wax and pentaerythritol stearate.
7. The aging-resistant insulated cable material of claim 1, wherein the inorganic filler is nano-sized calcium carbonate.
8. A method for preparing the aging-resistant insulated cable material according to any one of claims 1 to 7, comprising the steps of:
1) Weighing all raw materials according to parts by weight, and uniformly mixing all raw materials at the rotation speed of 500-800 rpm and the temperature of 90-110 ℃ to obtain a mixture;
2) Mixing the cooled mixture by using a double-screw extruder of a double-stage granulator set;
3) And extruding the obtained material by a single screw of a double-stage granulator set to form particles after mixing, so as to obtain the ageing-resistant insulated cable material.
9. The method according to claim 8, wherein the screw rotation speed in step 2) is 300 to 350 rpm, and the kneading temperature is controlled to 160 to 170 ℃.
10. The method according to claim 8, wherein the screw rotation speed in step 3) is 35 to 45 rpm and the temperature is controlled to 120 to 130 ℃.
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| WO2021258516A1 (en) * | 2020-06-22 | 2021-12-30 | 安徽滁州德威新材料有限公司 | Low-temperature-resistant flexible elastic injection-molding composition, preparation method therefor and use thereof |
| CN111925604A (en) * | 2020-06-30 | 2020-11-13 | 广州南洋电缆有限公司 | Cable material and preparation method thereof |
| CN113943465A (en) * | 2021-09-16 | 2022-01-18 | 江苏上上电缆集团新材料有限公司 | Environment-friendly 125 ℃ high-wear-resistance long-service-life thin-wall PVC insulating material for automobile wire |
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