An irradiated rubber cable and a method for producing the same

Abstract

The application relates to the technical field of cables, in particular to an irradiation rubber cable. A layer of irradiation rubber insulation is extruded outside a conductor, novel raw material formula and process are adopted for the irradiation rubber material, so that the core wire has excellent characteristics such as excellent ozone resistance, heat extension, insulation resistance, aging resistance and atmospheric aging resistance, then a plurality of core wires are stranded into a cable, and a layer of irradiation rubber sheath is extruded outside the periphery, the irradiation rubber sheath is prepared by adopting special raw material formula and process, so that the cable after stranding meets the tensile strength, breaking elongation, heat aging resistance, heat extension and oil immersion test, and meets the GB / T5013-2008 SE4 sheath performance index. Meanwhile, the preparation process of the irradiation rubber insulation layer and the irradiation rubber sheath layer does not need to adopt the steam continuous sulfur process, so that the problem of scorching caused by rubber mixing in the steam continuous sulfur process is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable, in particular to a kind of irradiation rubber cable and preparation method thereof. BACKGROUND

[0002] At present, general rubber flexible cable is used for household appliances, power tools and various mobile electrical equipment, the production of rubber cable in our country is mainly natural rubber, chlorobutyl rubber, chlorosulfonated polyethylene mainly, pollution is serious, traditional production method is mostly with steam continuous sulfur method.Steam continuous sulfur method process needs to be rubberized, and scorching problem is prone to occur.The wire produced has peculiar smell, and copper wire is prone to oxidation and blackening, there are problems of outdated production process, high energy consumption and high cost. SUMMARY

[0003] In order to solve the above technical problems, the present application provides a kind of irradiation rubber cable, including a plurality of core wires, the wrapping layer of wrapping a plurality of core wires, the shielding layer of winding the wrapping layer, and the irradiation rubber sheath layer of covering the shielding layer, the core wire includes conductor, polyester tape layer wrapped around the conductor and irradiation rubber insulation layer covered on the polyester tape layer, and filler is filled in the gap of a plurality of core wires.

[0004] Preferably, the shielding layer is formed by interleaving tin-plated alloy copper wire and copper foil tape.

[0005] Preferably, the wrapping layer is formed by wrapping non-woven fabric.

[0006] Preferably, the filler is a hemp rope.

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

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

[0009] S1, the sensitizer, composite stabilizer, active magnesium oxide and processing aid are put into the internal mixer according to the weight components, the internal mixer temperature is 120±3 DEG C, and the internal mixing time is 15-25 min;

[0010] S2, the talc, clay and super fine heavy calcium are put into the internal mixer according to the weight components, after internal mixing for 20-30 min, the chlorinated polyethylene, polyolefin elastomer and TOTM (trioctyl trimellitate) are put into the internal mixer according to the weight components, and the internal mixing time is 50-70 min;

[0011] S3, the obtained mixture is put into a filter for filtration, and then is cooled and rolled by an open mill, and then is pressed by a rolling press, and then is cooled by a cooling water tank and dried and rolled to obtain a rubber compound;

[0012] S4, a layer of polyester tape is wrapped around the periphery of the conductor, and the rubber compound is extruded on the polyester tape layer by an extruder to form a rubber insulation layer, and the obtained insulated core is irradiated 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: chlorinated polyethylene 80-90 parts, ethylene-propylene-diene rubber 15-20 parts, super-fine heavy calcium 20-30 parts, talc 70-80 parts, white carbon black 10-15 parts, antioxidant 0.2-0.4 parts, paraffin 1-5 parts, silane coupling agent 1-3 parts, plasticizer 10-12 parts, TOTM (trioctyl trimellitate) 10-12 parts, and sensitizer 4-6 parts.

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

[0016] A1, talc, white carbon black and super-fine heavy calcium are put into a mixer according to the weight components, and then are mixed for 10-20 minutes, and then antioxidants, paraffin, silane coupling agent, plasticizer, sensitizer are put into the mixer and mixed for 10-15 minutes;

[0017] A2, chlorinated polyethylene, ethylene-propylene-diene rubber and TOTM (trioctyl trimellitate) are put into the mixer according to the weight components, and then are mixed for 50-70 minutes;

[0018] A3, the obtained mixture is put into a filter for filtration, and then is cooled and rolled by an open mill, and then is pressed by a rolling press, and then is cooled by a cooling water tank and dried and rolled to obtain a rubber compound;

[0019] A4, a layer of wrapping layer and shielding layer is wrapped around the periphery of the core wire and the filler, the rubber compound is extruded on the shielding layer by 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 method provided in this application: By extruding a layer of irradiated rubber insulation on the outside of the conductor, using a novel raw material formulation and process for the irradiated rubber material, a core wire with excellent characteristics such as ozone resistance, thermal elongation, insulation resistance, aging resistance, and atmospheric aging resistance is obtained. Then, by stranding multiple core wires into a cable and extruding a layer of irradiated rubber sheath on the outer periphery, using a special raw material formulation and process for the irradiated rubber sheath, the cable, after being assembled, meets the tensile strength, elongation at break, heat aging resistance, thermal elongation, and oil immersion tests, satisfying the sheath performance indicators of GB / T5013-2008 SE4. Furthermore, the preparation processes of the irradiated rubber insulation layer and the irradiated rubber sheath layer do not require the steam vulcanization process, thus avoiding the scorching problem caused by the rubber refining required in the steam vulcanization process. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only a part of the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural diagram of an irradiated rubber cable according to an embodiment of this application. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] Example

[0026] To address the aforementioned technical problems, this embodiment provides an irradiated rubber cable, such as... Figure 1 As shown, it includes several core wires 10, a wrapping layer 20 wrapped around the several core wires 10, a shielding layer 30 wrapped around the wrapping layer 20, and an irradiated rubber sheath layer 40 covering the shielding layer 30. The core wires 10 include conductors 11, a polyester tape layer 12 wrapped around the conductors 11, and an irradiated rubber insulation layer 13 covering the polyester tape layer 12. The polyester tape layer 12 protects the copper wires from oxidation and makes it easy to peel the irradiated rubber insulation layer 13 from the conductors 11. The gaps between the several core wires 10 are filled with filler material 50.

[0027] Specifically, the shielding layer 30 is formed by interlaced winding of tin alloy copper wire and copper foil. The thickness of the shielding layer 30 is 0.3-0.5mm by interlaced winding of tin alloy copper wire and copper foil on the wrapping layer 20. Preferably, the thickness of the shielding layer 30 is 0.5mm, thereby improving the tensile strength and torsional bending resistance of the overall cable. Meanwhile, the shielding layer 30 formed by interlaced winding of tin copper wire and copper foil also has the effect of shielding external interference, ensuring normal operation of the equipment.

[0028] Further, the conductor 11 is formed by twisting several 5-class soft copper wires, and then wrapping the conductor 11 with a polyester tape to protect the copper wires from oxidation and to facilitate peeling between the conductor 11 and the chlorinated polyethylene rubber insulation layer 13.

[0029] Further, the core wire 10 is 5 and arranged in a ring shape, and the gap between the plurality of core wires 10 is filled with filler 50, which is filled with hemp rope, further ensuring the roundness of the cable core, and then the plurality of core wires 10 and the filler 50 are wrapped and fixed by the 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 formed by wrapping non-woven fabric.

[0030] Further, 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 1-1.2mm, preferably 1mm. The irradiated rubber insulation layer 13 protects and insulates the cable core inside the cable, reducing the harm of the cable to personnel, and the core wire 10 has excellent ozone and heat extension resistance, insulation resistance, aging resistance and atmospheric aging resistance, etc. excellent characteristics, and does not need to use steam continuous sulfur process, thereby avoiding the problem of scorching caused by rubber mixing in the steam continuous sulfur process.

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

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

[0033] Further, the method for preparing the core wire 10 includes the following steps:

[0034] S1, the sensitizing agent, composite stabilizer, active magnesium oxide and processing aid are put into the internal mixer according to the weight components, the temperature of the internal mixer is 120±3℃, and the internal mixing is 15-25min;

[0035] S2, the talc, clay and super fine heavy calcium are put into the internal mixer according to the weight components, after the internal mixing for 20-30min, the chlorinated polyethylene, polyolefin elastomer and TOTM (trioctyl trimellitate) are put into the internal mixer according to the weight components, and the internal mixing is 50-70min;

[0036] S3, the obtained mixture is put into the filter for filtering, and then is cooled by the open mill and rolled, and then is pressed by the rolling press, cooled by the cooling water tank and dried, and then is rolled to obtain the rubber material;

[0037] S4, a layer of polyester tape layer 12 is wrapped around the outer periphery of the conductor 11, and the rubber material is extruded on the polyester tape layer 12 by the extruder to form a rubber insulation layer, and the obtained insulated core is irradiated to obtain the core wire 10.

[0038] Further, in step S4, the obtained insulated core is collected and irradiated, the irradiation speed is 180-200m / M i n, and the irradiation energy is E=2.5dρ+0.25, wherein d is the insulation thickness, ρ is the material density, the irradiation speed is 200m / Min, and the irradiation makes the insulated core have good heat resistance and scratch resistance and no deformation.

[0039]

[0040]

[0041] Table 1

[0042] As shown in Table 1 above, the core wire with the irradiated rubber insulation layer 13 prepared by the above raw materials and preparation method has excellent ozone and heat extension resistance, insulation resistance, aging resistance and atmospheric aging resistance, and does not need to use the steam continuous sulfur process, thereby avoiding the problem of scorching caused by the steam continuous sulfur process, and meeting the performance index of GB / T5013-2008 IE4 insulation material.

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

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

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

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

[0047] A1, talc, white carbon black and superfine heavy calcium are put into the internal mixer according to the weight components, and after mixing for 10-20min, antioxidant, paraffin, silane coupling agent, plasticizer, sensitizer are put into the internal mixer and mixed for 10-15min;

[0048] A2, chlorinated polyethylene, ethylene-propylene-diene rubber and TOTM (trioctyl trimellitate) are put into the internal mixer according to the weight components, and mixed for 50-70min;

[0049] A3, the obtained mixture is filtered by a filter, then cooled and rolled by an open mill, then pressed by a rolling press, cooled by a cooling water tank, and dried and rolled to obtain a rubber material;

[0050] A4, wrapping the core wire 10 and the filler 50 with a wrapping layer 20 and a shielding layer 30, extruding a rubber compound on the shielding layer 30 by 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 120 KGy, and the irradiation speed is 140-160 m / min.

[0051]

[0052] Table 2

[0053] As shown in Table 2 above, the performance test results of the irradiated rubber cable meet the tensile strength, elongation at break, heat aging resistance, heat extension, and oil immersion test. The raw material formula and preparation method of the sheath layer described above make the performance of the sheath material of the cable meet the SE4 sheath performance index of GB / T5013-2008.

[0054] In summary, the scheme of the present application extrudes an irradiated rubber insulation layer outside the conductor, the irradiated rubber compound uses a novel raw material formula and process, thereby obtaining a core wire with excellent ozone resistance, heat extension, insulation resistance, aging resistance, and atmospheric aging resistance, etc. Then, a plurality of core wires are stranded into a cable, and an irradiated rubber sheath layer is extruded outside. The irradiated rubber sheath layer is made of a special raw material formula and process, so that the cable after stranding meets the tensile strength, elongation at break, heat aging resistance, heat extension, and oil immersion test, and meets the SE4 sheath performance index of GB / T5013-2008. At the same time, the preparation process of the irradiated rubber insulation layer and the irradiated rubber sheath layer does not need to use the steam continuous sulfur process, thereby avoiding the problem of scorching caused by the rubber mixing of the steam continuous sulfur process.

[0055] The above-described embodiments do not constitute a limitation on the protection scope of the technical solutions. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the above-described embodiments should be included in the protection scope of the technical solutions.

Claims

1. An irradiated rubber cable, characterized in that: It includes several core wires (10), a wrapping layer (20) wrapped around several core wires (10), a shielding layer (30) wrapped around the wrapping layer (20), and an irradiated rubber sheath layer (40) covering the shielding layer (30). The core wires (10) include conductors (11), polyester tape layers (12) wrapped around the conductors (11), and irradiated rubber insulation layers (13) covering the polyester tape layers (12). Filler (50) is filled in the gaps between several core wires (10). The irradiated rubber insulation 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 carbonate, 15-20 parts of kaolin, 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. The method for preparing the core wire (10) includes the following steps: S1. Add the sensitizer, composite stabilizer, active magnesium oxide and processing aid into the internal mixer according to the weight components. The temperature of the internal mixer is 120±3℃, and the mixing is carried out for 15-25 minutes. S2. Add talc, clay and ultrafine heavy calcium carbonate to the internal mixer according to the weight components, and mix for 20-30 minutes. Then add chlorinated polyethylene, polyolefin elastomer and TOTM oil to the internal mixer according to the weight components, and mix for 50-70 minutes. S3. The obtained mixture is fed into a filter press for filtration, then cooled and rolled in an open mill, then pressed into sheets by a rolling mill, cooled and dried in a cooling water tank, and then rolled to obtain rubber compound. S4. Wrap a layer of polyester tape (12) around the conductor (11), and extrude a layer of rubber insulation material on the polyester tape (12) through an extruder to obtain an insulated wire core. Irradiate the obtained insulated wire core to obtain the core wire (10).

2. The irradiated rubber cable according to claim 1, characterized in that: The shielding layer (30) is made of tin-plated copper wire and copper foil strip interlaced and wound.

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 made of non-woven fabric.

5. The irradiated rubber cable according to claim 1, characterized in that: In step S4, the irradiation rate is 180-200 m / min, and the irradiation energy is E=2.5dρ+0.25, where d is the insulation thickness and ρ is the material density.

6. The irradiated rubber cable according to claim 1, characterized in that: The irradiated rubber sheath layer (40) comprises the following components by weight: 80-90 parts of chlorinated polyethylene, 15-20 parts of ethylene propylene diene monomer (EPDM) rubber, 20-30 parts of ultrafine heavy calcium carbonate, 70-80 parts of talc, 10-15 parts of silica, 0.2-0.4 parts of antioxidant, 1-5 parts of paraffin wax, 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.

7. A preparation method for preparing the irradiated rubber cable of claim 6, characterized in that: Includes the following steps: A1. Add talc, silica, and superfine calcium carbonate to a mixer according to their weight proportions. Mix for 10-20 minutes. Then add antioxidant, paraffin wax, silane coupling agent, plasticizer, and sensitizer to the mixer and mix for 10-15 minutes. A2. Next, add chlorinated polyethylene, ethylene propylene diene monomer (EPDM) and TOTM (trioctyl trimellitate) into the internal mixer according to their weight components, and mix for 50-70 minutes. A3. The obtained mixture is fed into a filter press for filtration, then cooled and rolled in an open mill, then pressed into sheets by a rolling mill, cooled and dried in a cooling water tank, and then rolled to obtain rubber compound. A4. Wrap a wrapping layer (20) and a shielding layer (30) around the core wire (10) and filler (50), and extrude the rubber material on the wrapping layer (20) through an extruder to form a rubber sheath layer. Irradiate the rubber sheath layer to obtain an irradiated rubber cable.

8. The preparation method according to claim 7, characterized in that: In step A4, the irradiation dose is 120 KGy and the irradiation rate is 140-160 m / min.

Images