Irradiation rubber cable and preparation method thereof

Abstract

The invention relates to the technical field of cables, in particular to an irradiation rubber cable. The irradiation rubber insulating layer is extruded outside the conductor, and the irradiation rubber material adopts a novel raw material formula and process, so that the core wires with excellent characteristics of ozone resistance, thermal extension, insulation and electricity resistance, aging resistance, atmospheric aging resistance and the like are obtained, and then the plurality of core wires are stranded into the cable. And the irradiation rubber sheath layer is extruded on the periphery of the cable, and the irradiation rubber sheath layer is prepared by adopting a special raw material formula and a special process, so that the cable meets tensile strength, elongation at break, thermal aging resistance, thermal extension and oil immersion tests after cabling, and meets GB / T5013-2008SE4 sheath performance indexes. And meanwhile, the preparation process of the irradiation rubber insulating layer and the irradiation rubber sheath layer does not need to adopt a steam continuous vulcanization method process, so that the problem of scorching caused by rubber mixing required by the steam continuous vulcanization method process is avoided.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to an irradiated rubber cable and a preparation method thereof. Background Art

[0002] At present, general-purpose rubber soft cables are used in household appliances, power tools and various mobile electrical equipment. The current production of rubber cables in my country is mainly based on natural rubber, chloroprene rubber and chlorosulfonated polyethylene, which is seriously polluting. The traditional production method mostly uses the steam sulfurization method. The steam sulfurization process requires rubber refining, which is prone to scorching. The produced wire has a peculiar smell, and the copper wire is easily oxidized and blackened. There are problems such as outdated production technology, high energy consumption and high cost. Summary of the invention

[0003] In order to solve the above technical problems, the present application provides an irradiated rubber cable, comprising a plurality of core wires, a wrapping layer wrapped around the plurality of core wires, a shielding layer wrapped around the wrapping layer, and an irradiated rubber sheath layer coated on the shielding layer, the core wire comprising a conductor, a polyester tape layer wrapped around the conductor, and an irradiated rubber insulation layer coated on the polyester tape layer, and fillers are filled in the gaps between the plurality of core wires.

[0004] Preferably, the shielding layer is formed by interlacing and winding tin-plated alloy copper wires and copper foil tapes.

[0005] Preferably, the wrapping layer is made of non-woven fabric.

[0006] Preferably, the filler is hemp rope.

[0007] Preferably, the irradiated rubber insulation layer comprises the following components by weight: 80-90 parts of chlorinated polyethylene, 20-30 parts of polyolefin elastomer, 60-70 parts of talc, 30-40 parts of ultrafine heavy calcium, 15-20 parts of clay, 10-15 parts of TOTM (trioctyl trimellitate), 4.5-6 parts of sensitizer, 4-5 parts of composite stabilizer, 5-6 parts of active magnesium oxide, and 5-6 parts of processing aid.

[0008] Preferably, the core wire preparation method comprises the following steps:

[0009] S1. Put the sensitizer, composite stabilizer, active magnesium oxide and processing aid into an internal mixer according to the weight components. The temperature of the internal mixer is 120±3℃ and the internal mixer is kneaded for 15-25min.

[0010] S2, talcum powder, clay and ultrafine heavy calcium are put into an internal mixer according to weight components, and after internal mixing for 20-30 minutes, chlorinated polyethylene, polyolefin elastomer and TOTM (trioctyl trimellitate) are put into an internal mixer according to weight components, and internal mixing is carried out for 50-70 minutes;

[0011] S3, putting the obtained mixed material into a filter for filtering, and then cooling and rolling it in an open mill, and then rolling it in a roller to obtain a rubber compound after cooling and drying in a cooling water tank;

[0012] S4. Wrap a layer of polyester tape around the outer periphery of the conductor, extrude a layer of rubber insulation layer on the polyester tape layer through an extruder to obtain an insulated wire core, and irradiate the obtained insulated wire core to obtain a core wire.

[0013] Preferably, in step S4, the irradiation speed is 180-200 m / min, and the irradiation energy is E=2.5dρ+0.25, wherein d is the insulation thickness and ρ is the material density.

[0014] Preferably, the irradiated rubber sheath layer comprises the following components by weight: 80-90 parts of chlorinated polyethylene, 15-20 parts of EPDM rubber, 20-30 parts of ultrafine heavy calcium, 70-80 parts of talc, 10-15 parts of white carbon black, 0.2-0.4 parts of antioxidant, 1-5 parts of paraffin, 1-3 parts of silane coupling agent, 10-12 parts of plasticizer; 10-12 parts of TOTM (trioctyl trimellitate), and 4-6 parts of sensitizer.

[0015] Preferably, a preparation method for preparing the above-mentioned irradiated rubber cable comprises the following steps:

[0016] A1. Put talcum powder, white carbon black and ultrafine heavy calcium into an internal mixer according to the weight components, mix for 10-20 minutes, and then put antioxidant, paraffin, silane coupling agent, plasticizer, sensitizer into the internal mixer and mix for 10-15 minutes;

[0017] A2, put chlorinated polyethylene, EPDM rubber and TOTM (trioctyl trimellitate) into an internal mixer according to the weight components, and mix for 50-70 minutes;

[0018] A3, the obtained mixed material is put into a filter to filter, and then cooled and rolled in an open mill, and then rolled in a roller to obtain a rubber compound;

[0019] A4. A wrapping layer and a shielding layer are wrapped around the core wire and the filler, a rubber compound is extruded on the shielding layer through an extruder to form a rubber sheath layer, and the rubber sheath layer is irradiated to obtain an irradiated rubber cable.

[0020] Preferably, in step A4, the irradiation dose is 120 KGy and the irradiation speed is 140-160 m / min.

[0021] As can be seen from the above, the following beneficial effects can be obtained by applying the present application: by extruding a layer of irradiated rubber insulation layer outside the conductor, the irradiated rubber material adopts a novel raw material formula and process, so as to obtain a core wire with excellent characteristics such as excellent ozone resistance, heat extension, insulation resistance, aging resistance and atmospheric aging resistance, and then by twisting multiple core wires into a cable and extruding a layer of irradiated rubber sheath layer on the periphery, the irradiated rubber sheath layer adopts a special raw material formula and process, so that the cable meets the tensile strength, elongation at break, heat aging resistance, heat extension and oil immersion test after being cabled, and meets the sheath performance index of GB / T5013-2008 SE4. At the same time, the preparation process of the irradiated rubber insulation layer and the irradiated rubber sheath layer does not need to adopt the steam continuous sulfurization process, thereby avoiding the problem of scorching caused by the need for rubber refining in the steam continuous sulfurization process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the description of the embodiments of the present application or the prior art are briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0023] Figure 1 This is a structural diagram of the irradiated rubber cable according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] Example

[0026] In order to solve the above technical problems, this embodiment provides an irradiated rubber cable, such as Figure 1 As shown, it includes a plurality of core wires 10, a wrapping layer 20 wrapped around the plurality of core wires 10, a shielding layer 30 wrapped around the wrapping layer 20, and an irradiated rubber sheath layer 40 coated on the shielding layer 30. The core wire 10 includes a conductor 11, a polyester tape layer 12 wrapped around the conductor 11, and an irradiated rubber insulating layer 13 coated on the polyester tape layer 12. The polyester tape layer 12 protects the copper wire from oxidation and makes it easy to peel off the irradiated rubber insulating layer 13 and the conductor 11. The gaps between the plurality of core wires 10 are filled with fillers 50.

[0027] Specifically, the shielding layer 30 is formed by interlacing tin-plated copper wire and copper foil. The tin-plated copper wire and copper foil are interlaced and wound on the wrapping layer 20, and the thickness of the shielding layer 30 is 0.3-0.5 mm. Preferably, the thickness of the shielding layer 30 is 0.5 mm, thereby improving the tensile strength and torsional bending resistance of the entire cable. At the same time, the shielding layer 30 formed by winding tin-plated copper wire and copper foil also has the function of shielding external interference, ensuring the normal operation of the equipment.

[0028] Furthermore, the conductor 11 is formed by twisting a plurality of Category 5 soft copper wires, and then wrapping the conductor 11 with a polyester tape to protect the copper wires from oxidation and to facilitate peeling of the conductor 11 from the chlorinated polyethylene rubber insulation layer 13 .

[0029] Furthermore, there are five core wires 10 and they are distributed in a ring shape, and the gaps between the core wires 10 are filled with fillers 50, which are filled with hemp ropes to further ensure the roundness of the cable core, and then the core wires 10 and the fillers 50 are wrapped and fixed with a wrapping layer 20, so that the internal structure of the cable is not loose, and the stability of the cable structure is improved. The wrapping layer 20 is made of non-woven fabric.

[0030] Furthermore, the insulation layer of the core wire 10 is made of irradiated chlorinated polyethylene rubber material, and the thickness of the chlorinated polyethylene rubber insulation layer 13 is 1-1.2 mm, and preferably, the thickness of the irradiated rubber insulation layer 13 is 1 mm. The irradiated rubber insulation layer 13 is used to protect and insulate the cable core inside the cable, thereby reducing the harm of the cable to personnel. The irradiated rubber insulation layer 13 makes the core wire 10 have excellent characteristics such as excellent ozone resistance and thermal elongation, insulation resistance, aging resistance and atmospheric aging resistance, and at the same time, there is no need to use the steam continuous vulcanization process, thereby avoiding the problem of scorching caused by the need for rubber refining in the steam continuous vulcanization process.

[0031] In the above scheme, the irradiated rubber insulation layer 13 includes the following components by weight: 80-90 parts of chlorinated polyethylene, 20-30 parts of polyolefin elastomer, 60-70 parts of talc, 30-40 parts of ultrafine heavy calcium, 15-20 parts of clay, 10-15 parts of TOTM (trioctyl trimellitate), 4.5-6 parts of sensitizer, 4-5 parts of composite stabilizer, 5-6 parts of active magnesium oxide, and 5-6 parts of processing aid.

[0032] Preferably, 80 parts of chlorinated polyethylene, 20 parts of polyolefin elastomer, 70 parts of talc, 30 parts of ultrafine calcium carbonate, 15 parts of clay, 10 parts of TOTM (trioctyl trimellitate), 4.5 parts of sensitizer, 4 parts of composite stabilizer, 5 parts of active magnesium oxide, and 5 parts of processing aid.

[0033] Furthermore, the method for preparing the core wire 10 comprises the following steps:

[0034] S1. Put the sensitizer, composite stabilizer, active magnesium oxide and processing aid into an internal mixer according to the weight components. The temperature of the internal mixer is 120±3℃ and the internal mixer is kneaded for 15-25min.

[0035] S2, talcum powder, clay and ultrafine heavy calcium are put into an internal mixer according to weight components, and after internal mixing for 20-30 minutes, chlorinated polyethylene, polyolefin elastomer and TOTM (trioctyl trimellitate) are put into an internal mixer according to weight components, and internal mixing is carried out for 50-70 minutes;

[0036] S3, putting the obtained mixed material into a filter for filtering, and then cooling and rolling it in an open mill, and then rolling it in a roller to obtain a rubber compound after cooling and drying in a cooling water tank;

[0037] S4. Wrap a layer of polyester tape 12 around the outer periphery of the conductor 11, extrude a layer of rubber insulation layer on the polyester tape 12 through an extruder to obtain an insulated wire core, and irradiate the obtained insulated wire core to obtain a core wire 10.

[0038] Furthermore, in step S4, the obtained insulated wire core is irradiated after being closed, the irradiation speed is 180-200m / M in, the irradiation energy is E=2.5dρ+0.25, wherein d is the insulation thickness, ρ is the material density, and the irradiation speed is 200m / Min. Through irradiation, the insulated wire core has good heat resistance and scratch resistance and does not deform.

[0039]

[0040]

[0041] Table 1

[0042] Table 1 above shows the test results of the insulation core wire performance. It can be seen from the above that the core wire with the irradiated rubber insulation layer 13 is obtained by the above raw materials and preparation method. The core wire has excellent characteristics such as excellent ozone resistance and thermal elongation, insulation resistance, aging resistance and atmospheric aging resistance. At the same time, there is no need to adopt the steam vulcanization process, thereby avoiding the problem of scorching caused by rubber refining required in the steam vulcanization process, and meets the GB / T5013-2008 IE4 insulation material performance index.

[0043] Furthermore, the thickness of the irradiated rubber sheath layer 40 is 1.5-2 mm, and the preferred thickness is 1.8 mm. The irradiated rubber sheath layer 40 is made of irradiated chlorinated polyethylene rubber, which has good heat resistance and insulation properties, can maintain high flexibility at high and low temperatures, effectively buffers the internal stress of cable torsion, ensures the normal operation of the cable under torsion, and prevents the internal components of the cable from being corroded by external chemicals and causing damage to the cable, so that the cable meets the tensile strength, elongation at break, heat aging resistance, thermal extension and oil immersion performance tests, and meets the GB / T5013-2008 SE4 sheath performance indicators.

[0044] Further, in the above scheme, the irradiated rubber sheath layer 40 includes the following components by weight: 80-90 parts of chlorinated polyethylene, 15-20 parts of EPDM rubber, 20-30 parts of ultrafine heavy calcium, 70-80 parts of talc, 10-15 parts of white carbon black, 0.2-0.4 parts of antioxidant, 1-5 parts of paraffin, 1-3 parts of silane coupling agent, 10-12 parts of plasticizer; 10-12 parts of TOTM (trioctyl trimellitate) oil, and 4-6 parts of sensitizer.

[0045] Preferably, the irradiated rubber sheath layer 40 includes the following components by weight: 90 parts of chlorinated polyethylene, 20 parts of EPDM rubber, 20 parts of ultrafine heavy calcium, 70 parts of talc, 15 parts of white carbon black, 0.4 parts of antioxidant, 2 parts of paraffin, 1 part of silane coupling agent, 10 parts of plasticizer; 10 parts of TOTM (trioctyl trimellitate), and 4 parts of sensitizer.

[0046] On the other hand, this embodiment provides a preparation method for preparing the above-mentioned irradiated rubber cable, comprising the following steps:

[0047] A1. Put talcum powder, white carbon black and ultrafine heavy calcium into an internal mixer according to the weight components, mix for 10-20 minutes, and then put antioxidant, paraffin, silane coupling agent, plasticizer, sensitizer into the internal mixer and mix for 10-15 minutes;

[0048] A2, put chlorinated polyethylene, EPDM rubber and TOTM (trioctyl trimellitate) into an internal mixer according to the weight components, and mix for 50-70 minutes;

[0049] A3, the obtained mixed material is put into a filter to filter, and then cooled and rolled in an open mill, and then rolled in a roller to obtain a rubber compound;

[0050] A4, wrapping a wrapping layer 20 and a shielding layer 30 around the core wire 10 and the filler 50, extruding the rubber compound on the shielding layer 30 through an extruder to form a rubber sheath layer, and irradiating the rubber sheath layer to obtain an irradiated rubber cable. In this step, the irradiation dose is 120KGy, and the irradiation speed is 140-160m / min.

[0051]

[0052] Table 2

[0053] Table 2 above shows the performance test results of the irradiated rubber cable, which meets the tensile strength, elongation at break, heat aging, hot extension and oil immersion tests. Through the raw material formula and preparation method of the above-mentioned sheath layer, the sheath material performance of the cable meets the sheath performance indicators of GB / T5013-2008 SE4.

[0054] In summary, the present application scheme extrude a layer of irradiated rubber insulation layer outside the conductor, and the irradiated rubber material adopts a novel raw material formula and process, so as to obtain a core wire with excellent characteristics such as excellent ozone resistance, heat extension, insulation resistance, aging resistance and atmospheric aging resistance, and then twist multiple core wires into a cable, and extrude a layer of irradiated rubber sheath layer on the periphery, and the irradiated rubber sheath layer adopts a special raw material formula and process, so that the cable meets the tensile strength, elongation at break, heat aging resistance, heat extension and oil immersion test after being cabled, and meets the GB / T5013-2008 SE4 sheath performance index. At the same time, the preparation process of the irradiated rubber insulation layer and the irradiated rubber sheath layer does not need to adopt the steam continuous vulcanization process, thereby avoiding the problem of scorching caused by the need for rubber refining in the steam continuous vulcanization process.

[0055] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. An irradiated rubber cable, characterized in that: The invention comprises a plurality of core wires (10), a wrapping layer (20) wrapped around the plurality of core wires (10), a shielding layer (30) wound around the wrapping layer (20), and an irradiated rubber sheath layer (40) coated on the shielding layer (30); the core wire (10) comprises a conductor (11), a polyester tape layer (12) wrapped around the conductor (11), and an irradiated rubber insulating layer (13) coated on the polyester tape layer (12); and a filler (50) is filled in the gaps between the plurality of core wires (10).

2. The irradiated rubber cable according to claim 1, characterized in that: The shielding layer (30) is formed by interlacing and winding tin-plated alloy copper wires and copper foil tapes.

3. The irradiated rubber cable according to claim 1, characterized in that: The filler (50) is made of hemp rope.

4. The irradiated rubber cable according to claim 1, characterized in that: The wrapping layer (20) is formed by wrapping with non-woven fabric.

5. The irradiated rubber cable according to claim 1, characterized in that: The irradiated rubber insulating layer (13) comprises the following components by weight: 80-90 parts of chlorinated polyethylene, 20-30 parts of polyolefin elastomer, 60-70 parts of talc, 30-40 parts of ultrafine heavy calcium, 15-20 parts of clay, 10-15 parts of TOTM (trioctyl trimellitate), 4.5-6 parts of sensitizer, 4-5 parts of composite stabilizer, 5-6 parts of active magnesium oxide, and 5-6 parts of processing aid.

6. The irradiated rubber cable according to claim 5, characterized in that: The core wire (10) preparation method comprises the following steps: S1. Put the sensitizer, composite stabilizer, active magnesium oxide and processing aid into an internal mixer according to the weight components. The temperature of the internal mixer is 120±3℃ and the internal mixer is kneaded for 15-25min. S2, talcum powder, clay and ultrafine heavy calcium are put into an internal mixer according to weight components, and after internal mixing for 20-30 minutes, chlorinated polyethylene, polyolefin elastomer and TOTM oil are put into the internal mixer according to weight components, and internal mixing is carried out for 50-70 minutes; S3, putting the obtained mixed material into a filter for filtering, and then cooling and rolling it in an open mill, and then rolling it in a roller to obtain a rubber compound after cooling and drying in a cooling water tank; S4. Wrap a layer of polyester tape (12) around the outer periphery of the conductor (11), extrude a layer of rubber insulation layer on the polyester tape (12) using a rubber compound through an extruder, and obtain an insulated wire core. Irradiate the obtained insulated wire core to obtain a core wire (10).

7. The irradiated rubber cable according to claim 6, characterized in that: In step S4, the irradiation speed is 180-200 m / Min, and the irradiation energy is E=2.5dρ+0.25, wherein d is the insulation thickness and ρ is the material density.

8. The irradiated rubber cable according to claim 6, characterized in that: The irradiated rubber jacket layer (40) comprises the following components by weight: 80-90 parts of chlorinated polyethylene, 15-20 parts of ethylene propylene rubber, 20-30 parts of ultrafine heavy calcium, 70-80 parts of talc, 10-15 parts of white carbon black, 0.2-0.4 parts of antioxidant, 1-5 parts of paraffin wax, 1-3 parts of silane coupling agent, and 10-12 parts of plasticizer; TOTM (trioctyl trimellitate) 10-12 parts, sensitizer 4-6 parts.

9. A preparation method for preparing the irradiated rubber cable according to claim 8, characterized in that: The following steps are involved: A1. Put talcum powder, white carbon black and ultrafine heavy calcium into an internal mixer according to the weight components, mix for 10-20 minutes, and then put antioxidant, paraffin, silane coupling agent, plasticizer, sensitizer into the internal mixer and mix for 10-15 minutes; A2, put chlorinated polyethylene, EPDM rubber and TOTM (trioctyl trimellitate) into an internal mixer according to the weight components, and mix for 50-70 minutes; A3, the obtained mixed material is put into a filter to filter, and then cooled and rolled in an open mill, and then rolled in a roller to obtain a rubber compound; A4. A wrapping layer (20) and a shielding layer (30) are wrapped around the core wire (10) and the filler (50), a rubber compound is extruded on the wrapping layer (20) by an extruder to form a rubber sheath layer, and the rubber sheath layer is irradiated to obtain an irradiated rubber cable.

10. The preparation method according to claim 9, characterized in that: In step A4, the irradiation dose is 120 KGy and the irradiation speed is 140-160 m / min.

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