Tensile extrusion-resistant watertight cable and preparation method thereof

Abstract

The invention relates to the technical field of cable manufacturing, and discloses a tensile extrusion-resistant watertight cable and a preparation method thereof. The method comprises the following steps: (1) placing a conductor in a tubular strander, and carrying out gluing treatment and stranding treatment to obtain an intermediate I; (2) performing insulation extrusion treatment on the intermediate I to obtain an intermediate II; (3) carrying out stranded wire core assembly processing on the intermediate II to obtain a cable core; (4) performing first extrusion treatment on the cable core to obtain an intermediate III; (5) winding PBO fiber on the inner sheath of the intermediate III to obtain an intermediate IV; and (6) carrying out second extrusion treatment on the intermediate IV. The middle of the cable is filled with ultra-high molecular weight polyethylene, the tensile layer is made of PBO, the cable is not affected by temperature during extrusion and can provide super-strong tensile strength, the inner sheath is made of chemical foaming polyurethane, and provided chlorosulfonated polyethylene rubber improves flame retardance, improves tensile strength and improves the retention rate of elongation after thermal aging.

Description

Technical Field

[0001] The invention relates to the technical field of cable manufacturing, and in particular to a tensile and extrusion-resistant watertight cable and a preparation method thereof. Background Art

[0002] With the rapid development of underwater exploration, deep-sea resource development and marine engineering technology, the demand for high-performance watertight cables is growing. Traditional watertight cables often face problems such as insufficient tensile strength and reduced sealing performance in complex underwater environments. Especially during long-distance dragging and frequent splicing, it is easy to cause cable breakage or water molecules to penetrate, affecting signal transmission and equipment safety. Therefore, the present invention aims to provide a new type of tensile-resistant watertight cable and its manufacturing method to improve the tensile strength and watertight performance of the cable to meet the high standards of underwater engineering. Summary of the invention

[0003] The purpose of the present invention is to provide a tensile and extrusion-resistant watertight cable and a preparation method thereof based on the above technical problems.

[0004] In order to achieve the above object, the first aspect of the present invention provides a method for preparing a tensile and extrusion resistant watertight cable, the method comprising the following steps: (1) placing the conductor in a tubular stranding machine, connecting it to a glue coating machine, and then connecting it to a Hough die, performing glue coating and stranding processes, and obtaining an intermediate I; (2) placing the intermediate I in a high-temperature extruder for insulation extrusion treatment to obtain intermediate II; (3) placing the intermediate II in a cage stranding machine with pay-off tension control to carry out stranding of the core assembly, thereby obtaining a cable core filled with ultra-high-strength polyethylene fiber, the structure of which is a conductor-insulating layer from the inside to the outside; (4) placing the cable core in a low-temperature extruder for a first extrusion treatment to extrude a foamed polyurethane material so that the foaming degree meets the requirements, thereby obtaining an intermediate III having a structure of conductor-insulating layer-inner sheath from inside to outside; (5) placing the intermediate III in a comb winding machine, and winding the PBO fiber on the inner sheath to obtain an intermediate IV having a structure of conductor-insulating layer-inner sheath-tensile layer from inside to outside; (6) The intermediate IV is placed in a rubber extruder for a second extrusion treatment to extrude the chlorosulfonated polyethylene rubber so that the outer sheath is embedded in the tensile layer, thereby obtaining a tensile-resistant, extrusion-resistant, watertight cable having a structure of conductor-insulating layer-inner sheath-tensile layer-outer sheath from inside to outside.

[0005] Preferably, in step (1), the gluing treatment is performed using high temperature resistant hot melt water-resistant glue, and the gluing treatment conditions meet the following conditions: the temperature of the gluing machine is 170-180°C.

[0006] Further preferably, in step (1), the twisting process satisfies the condition that the conductor twisting pitch ratio is 8-10.

[0007] Preferably, in step (2), the insulation extrusion process is to extrude the molten polyperfluoroethylene propylene material onto the intermediate I and then extrude it through a tube extrusion die.

[0008] Preferably, in step (3), the processing conditions of the twisted wire core assembly meet the following conditions: the twisting pitch multiple is 10-12.

[0009] More preferably, in step (4), the conditions of the first extrusion treatment meet the following conditions: the extruder temperature is 160-180°C.

[0010] Preferably, in step (6), the chlorosulfonated polyethylene rubber comprises, by weight: 90-110 parts of chlorosulfonated polyethylene, 15-19 parts of magnesium oxide, 1-2 parts of sodium stearate, 1-4 parts of microcrystalline wax, 4-6 parts of butadiene rubber, 3-7 parts of styrene-butadiene rubber, 15-20 parts of carbon black N550, 5-10 parts of kaolin, 5-10 parts of barite, 5-15 parts of diatomaceous earth, 10-15 parts of dioctyl ester, 4-7 parts of chlorinated paraffin, 2-4 parts of pentaerythritol, 2-4 parts of vulcanizing agent, 0.5-1 parts of sulfur, 2-3 parts of accelerator DPTT, and 0.5-1 parts of antioxidant.

[0011] According to a particularly preferred embodiment, the preparation of the chlorosulfonated polyethylene rubber is carried out in a dust-free workshop, and the preparation method comprises the following steps: S1: Chlorosulfonated polyethylene, magnesium oxide, sodium stearate, microcrystalline wax, butadiene rubber, styrene-butadiene rubber, dioctyl ester, chlorinated paraffin, pentaerythritol, and antioxidant are weighed according to the proportion, and placed in an internal mixer for a first mixing treatment to obtain a mixed material I; S2: Carbon black N550, kaolin, barite, and diatomaceous earth are weighed according to the proportion, and placed in a grinder for mixing to obtain a mixed material II; S3: weighing a vulcanizing agent and sulfur according to a ratio, adding the mixed material I and the mixed material II, placing the mixed material in an open mill for a second mixing treatment, and obtaining an intermediate; S4: Raise the temperature to 88-93°C, add the accelerator DPTT weighed according to the ratio to the intermediate, perform the third mixing treatment, ventilate to reduce the temperature to 15-35°C, obtain chlorosulfonated polyethylene rubber, and pound the chlorosulfonated polyethylene rubber, make triangle packages and rolls 4 times respectively, mix them evenly, and put them into sheets.

[0012] Preferably, in step S1, the conditions of the first mixing treatment meet the following requirements: the mixing time is 8-12 minutes and the mixing temperature is 65-75°C.

[0013] Further preferably, in step S2, the mixing treatment conditions meet: a rotation speed of 80-120 r / min and a time of 20-30 min.

[0014] Preferably, in step S3, the conditions of the second mixing treatment meet the following requirements: temperature is 75-85° C., and time is 3-4 min.

[0015] More preferably, in step S4, the conditions of the third mixing treatment meet the following conditions: temperature is 88-93° C., and time is 1-3 min.

[0016] The second aspect of the present invention provides a tensile and compression-resistant watertight cable prepared by the method described in the first aspect of the present invention, wherein the tensile and compression-resistant watertight cable comprises, from inside to outside, a conductor, an insulating layer, a tensile layer, an inner sheath, and an outer sheath; The inner sheath is coated on the outer side of the cable core, the anti-tension layer is wound around the outer side of the inner sheath, and the outer sheath is coated on the outer side of the anti-tension layer; wherein the cable core includes a conductor and an insulating layer.

[0017] The method provided by the present invention has at least the following beneficial effects: The tensile and extrusion-resistant watertight cable of the present invention adopts ultra-high molecular polyethylene as the middle filling, and the tensile layer adopts PBO whose performance will not be affected by temperature during extrusion, and can provide super strong breaking force. At the same time, the inner sheath adopts chemical foaming polyurethane to reduce the weight of the cable. The chlorosulfonated polyethylene rubber provided improves the flame retardancy, increases the tensile strength and the retention rate of the elongation after heat-resistant aging, and also has good low-temperature performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of a tensile and extrusion-resistant watertight cable obtained in an embodiment of the present invention; Figure 2 is a cross-sectional view of a cable of model 422-100 used in an embodiment of the present invention; Figure 3 The specification obtained in step (1) of the embodiment of the present invention is 3 mm 2 A cross-sectional view of intermediate I; Figure 4 is a cross-sectional view of a Category 5e cable used in an embodiment of the present invention; Figure 5 The specification obtained in step (1) of the embodiment of the present invention is 0.5 mm 2 A cross-sectional view of intermediate I; Figure 6 The specification obtained in step (1) of the embodiment of the present invention is 0.35 mm 2 Cross-sectional view of intermediate I. DETAILED DESCRIPTION

[0019] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0020] In the present invention, the pitch multiple is the ratio of the pitch to the diameter.

[0021] The present invention will be described in detail below by way of examples. In the following examples, unless otherwise specified, the raw materials are all commercially available.

[0022] In the following examples, unless otherwise specified, Category 5e refers to the model of Category 5e cable (section diagram as shown in Figure 4 422-100 indicates the cable model is 422-100 (the cross-sectional view is as shown in Figure 2 as shown).

[0023] In the following examples, unless otherwise specified, the water-blocking hot melt adhesive was purchased from Jiangsu Jiuchen Electric Co., Ltd. with a brand name of DZ-111, a hardness of 70A, a softening point of 150°C, and a dielectric strength of 20Kv / mm.

[0024] Preparation Example 1: Chlorosulfonated polyethylene rubber, in parts by weight, includes: 110 parts of chlorosulfonated polyethylene, 15 parts of magnesium oxide, 2 parts of sodium stearate, 4 parts of microcrystalline wax, 4 parts of butadiene rubber, 7 parts of styrene-butadiene rubber, 20 parts of carbon black N550, 5 parts of kaolin, 5 parts of barite, 15 parts of diatomaceous earth, 15 parts of dioctyl ester, 4 parts of chlorinated paraffin, 4 parts of pentaerythritol, 4 parts of vulcanizing agent, 1 part of sulfur, 3 parts of accelerator DPTT, and 1 part of antioxidant; S1: Chlorosulfonated polyethylene, magnesium oxide, sodium stearate, microcrystalline wax, butadiene rubber, styrene-butadiene rubber, dioctyl ester, chlorinated paraffin, pentaerythritol and antioxidant are weighed according to the proportion, and placed in an internal mixer for a first mixing treatment to obtain a mixed material I; the conditions of the first mixing treatment are as follows: the mixing time is 12 minutes and the mixing temperature is 75°C; S2: Carbon black N550, kaolin, barite, and diatomaceous earth are weighed according to the proportion, and placed in a grinder for mixing to obtain a mixed material II; the mixing process is performed under the following conditions: a rotation speed of 100 r / min and a time of 25 min; S3: weighing a vulcanizing agent and sulfur according to a ratio, adding the mixed material I and the mixed material II, placing the mixed material I and the mixed material II in an open mill for a second mixing process to obtain an intermediate; the conditions of the second mixing process are as follows: a temperature of 85° C. and a time of 4 minutes; S4: Raise the temperature to 93°C, add the accelerator DPTT weighed according to the ratio to the intermediate, carry out the third mixing treatment, ventilate to reduce the temperature to 35°C, obtain chlorosulfonated polyethylene rubber, and pound the chlorosulfonated polyethylene rubber, make triangle packages and rolls 4 times respectively, mix them evenly, and put them into sheets; the conditions of the third mixing treatment meet the following requirements: temperature is 93°C, and time is 3 minutes. Example 1

[0025] This example is used to provide a method for preparing a tensile and extrusion-resistant watertight cable, and the method comprises the following steps: (1) Three groups of 19 conductors with different monofilament diameters are placed in a tube stranding machine, connected to a glue coating machine, and connected to a Hough die (for making the glue coating uniform and dense), and glue coating and stranding are performed to obtain three intermediates I; the specifications of the three intermediates I are 0.35 mm 2 (Cross-section diagram as Figure 6 As shown), 0.5mm 2 (Cross-section diagram as Figure 5 As shown), 3mm 2 (Cross-section diagram as Figure 3 As shown); the gluing treatment is carried out with a high temperature resistant hot melt water-resistant glue, and the gluing treatment conditions meet: the gluing machine temperature is 180°C; the twisting treatment conditions meet: the conductor twisting pitch ratio is 10; (2) placing the intermediate I in a high-temperature extruder for insulation extrusion treatment to obtain an intermediate II; the insulation extrusion treatment is to extrude the molten polyperfluoroethylene propylene material onto the intermediate I and then extrude it through a tube extrusion die; (3) The intermediate II, Category 5e, and 422-100 are placed in a cage stranding machine with a pay-off tension control for twisted wire core assembly processing to obtain a cable core filled with ultra-high-strength polyethylene fiber filling rope, and the structure from the inside to the outside is a conductor-insulating layer; the twisted wire core assembly processing uses a glue coating machine to evenly fill the water-blocking glue, and the conditions for the twisted wire core assembly processing meet: the twist pitch multiple is 10; (4) placing the cable core in a low-temperature extruder for a first extrusion treatment to extrude a foamed polyurethane material so that the foaming degree meets the requirements, thereby obtaining an intermediate III having a structure of conductor-insulating layer-inner sheath from inside to outside; the conditions of the first extrusion treatment are as follows: the extruder temperature is 160° C.; (5) placing the intermediate III in a comb winding machine, and winding the PBO fiber on the inner sheath to obtain an intermediate IV having a structure of conductor-insulating layer-inner sheath-tensile layer from inside to outside; (6) placing the intermediate IV in a rubber extruder for a second extrusion treatment to extrude the chlorosulfonated polyethylene rubber so that the outer sheath is embedded in the tensile layer, thereby obtaining a tensile-resistant, extrusion-resistant, watertight cable having a structure of conductor-insulating layer-inner sheath-tensile layer-outer sheath from inside to outside (such as Figure 1 as shown).

[0026] The tensile and compression-resistant watertight cable comprises a cable core with multiple cable cores twisted together, a tensile layer, an inner sheath and an outer sheath; wherein the inner sheath is coated on the outside of the cable core, the tensile layer is wound around the outside of the inner sheath, and the outer sheath is coated on the outside of the tensile layer; wherein the cable core comprises a conductor and an insulating layer. Example 2

[0027] This example is used to provide a method for preparing a tensile and extrusion-resistant watertight cable, and the method comprises the following steps: (1) Three groups of seven conductors with different monofilament diameters are placed in a tube stranding machine, connected to a glue coating machine, and connected to a half mold (for making the glue coating uniform and dense), and glue coating and stranding are performed to obtain three intermediates I; the specifications of the three intermediates I are 0.35 mm 2 (Cross-section diagram as Figure 6 As shown), 0.5mm 2 (Cross-section diagram as Figure 5 As shown), 3mm 2 (Cross-section diagram as Figure 3 As shown); the gluing treatment is carried out with high temperature resistant hot melt water-resistant glue, and the gluing treatment conditions meet: the gluing machine temperature is 170°C; the twisting treatment conditions meet: the conductor twisting pitch ratio is 8; (2) placing the intermediate I in a high-temperature extruder for insulation extrusion treatment to obtain an intermediate II; the insulation extrusion treatment is to extrude the molten polyperfluoroethylene propylene material onto the intermediate I and then extrude it through a tube extrusion die; (3) placing the intermediate II, Category 5e, and 422-100 in a cage stranding machine with pay-off tension control to process the stranded wire core assembly, thereby obtaining a cable core filled with ultra-high-strength polyethylene fiber filling rope, the structure of which is a conductor-insulating layer from the inside to the outside; the conditions for processing the stranded wire core assembly meet the following requirements: the stranding pitch multiple is 12; (4) placing the cable core in a low-temperature extruder for a first extrusion treatment to extrude a foamed polyurethane material so that the foaming degree meets the requirements, thereby obtaining an intermediate III having a structure of conductor-insulating layer-inner sheath from inside to outside; the conditions of the first extrusion treatment are as follows: the extruder temperature is 180° C.; (5) placing the intermediate III in a comb winding machine, and winding the PBO fiber on the inner sheath to obtain an intermediate IV having a structure of conductor-insulating layer-inner sheath-tensile layer from inside to outside; (6) The intermediate IV is placed in a rubber extruder for a second extrusion treatment to extrude the chlorosulfonated polyethylene rubber so that the outer sheath is embedded in the tensile layer, thereby obtaining a tensile-resistant, extrusion-resistant, watertight cable having a structure of conductor-insulating layer-inner sheath-tensile layer-outer sheath from inside to outside.

[0028] The tensile and compression-resistant watertight cable comprises a cable core with multiple cable cores twisted together, a tensile layer, an inner sheath and an outer sheath; wherein the inner sheath is coated on the outside of the cable core, the tensile layer is wound around the outside of the inner sheath, and the outer sheath is coated on the outside of the tensile layer; wherein the cable core comprises a conductor and an insulating layer.

[0029] Comparative Example 1: This example is carried out according to the method of Example 1, except that in step (1), the gluing process is carried out using the same amount of hot melt adhesive, and the remaining steps and parameters are the same as in Example 1.

[0030] Comparative Example 2: This example is carried out according to the method of Example 1, except that in step (3), the intermediate II is placed in a cage stranding machine with a pay-off tension control to carry out stranded wire core assembly processing to obtain a cable core filled with water-blocking yarn and having a conductor-insulating layer structure from the inside to the outside. The remaining steps and parameters are the same as those of Example 1.

[0031] Comparative Example 3: This example is carried out according to the method of Example 1, except that in step (5), the intermediate III is placed in a comb winding machine, and the aramid filaments are wound on the inner sheath to obtain an intermediate IV with a structure of conductor-insulating layer-inner sheath-tensile layer from the inside to the outside. The remaining steps and parameters are the same as in Example 1.

[0032] Test example: The watertightness and tensile properties of the tensile and extrusion-resistant watertight cables obtained in the above embodiments and comparative examples were tested, and the results are shown in Table 1. Table 1: ; It can be seen from the results in Table 1 that the tensile and extrusion-resistant watertight cable prepared by the method of the present invention has significantly better watertightness and tensile properties, and reduces the weight of the cable.

[0033] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A method for preparing a tensile and extrusion-resistant watertight cable, characterized in that: The method comprises the following steps: (1) placing the conductor in a tubular stranding machine, connecting it to a glue coating machine, and then connecting it to a Hough die, performing glue coating and stranding processes, and obtaining an intermediate I; (2) placing the intermediate I in a high-temperature extruder for insulation extrusion treatment to obtain intermediate II; (3) placing the intermediate II in a cage stranding machine with pay-off tension control to carry out stranding of the core assembly, thereby obtaining a cable core filled with ultra-high-strength polyethylene fiber, the structure of which is a conductor-insulating layer from the inside to the outside; (4) placing the cable core in a low-temperature extruder for a first extrusion treatment to extrude a foamed polyurethane material so that the foaming degree meets the requirements, thereby obtaining an intermediate III having a structure of conductor-insulating layer-inner sheath from inside to outside; (5) placing the intermediate III in a comb winding machine, and winding the PBO fiber on the inner sheath to obtain an intermediate IV having a structure of conductor-insulating layer-inner sheath-tensile layer from inside to outside; (6) The intermediate IV is placed in a rubber extruder for a second extrusion treatment to extrude the chlorosulfonated polyethylene rubber so that the outer sheath is embedded in the tensile layer, thereby obtaining a tensile-resistant, extrusion-resistant, watertight cable having a structure of conductor-insulating layer-inner sheath-tensile layer-outer sheath from inside to outside.

2. The method according to claim 1, wherein: In step (1), the gluing treatment is performed using a high temperature resistant hot melt water-resistant glue, and the gluing treatment conditions meet the following requirements: the gluing machine temperature is 170-180°C; And / or, in step (1), the twisting process satisfies the condition that the conductor twisting pitch ratio is 8-10.

3. The method according to claim 1 or 2, wherein: In step (2), the insulation extrusion process is to extrude the molten polyperfluoroethylene propylene material onto the intermediate I and then extrude it through a tube extrusion die.

4. The method according to claim 1 or 2, wherein: In step (3), the processing conditions of the twisted wire core assembly meet the following conditions: the twist pitch multiple is 10 to 12; And / or, in step (4), the conditions of the first extrusion treatment meet: the extruder temperature is 160-180°C.

5. The method according to claim 1 or 2, wherein: In step (6), the chlorosulfonated polyethylene rubber comprises, by weight: 90-110 parts of chlorosulfonated polyethylene, 15-19 parts of magnesium oxide, 1-2 parts of sodium stearate, 1-4 parts of microcrystalline wax, 4-6 parts of butadiene rubber, 3-7 parts of styrene-butadiene rubber, 15-20 parts of carbon black N550, 5-10 parts of kaolin, 5-10 parts of barite, 5-15 parts of diatomaceous earth, 10-15 parts of dioctyl ester, 4-7 parts of chlorinated paraffin, 2-4 parts of pentaerythritol, 2-4 parts of vulcanizing agent, 0.5-1 parts of sulfur, 2-3 parts of accelerator DPTT, and 0.5-1 parts of antioxidant.

6. The method according to claim 5, wherein: The preparation of the chlorosulfonated polyethylene rubber is carried out in a dust-free workshop, and the preparation method comprises the following steps: S1: Chlorosulfonated polyethylene, magnesium oxide, sodium stearate, microcrystalline wax, butadiene rubber, styrene-butadiene rubber, dioctyl ester, chlorinated paraffin, pentaerythritol, and antioxidant are weighed according to the proportion, and placed in an internal mixer for a first mixing treatment to obtain a mixed material I; S2: Carbon black N550, kaolin, barite, and diatomaceous earth are weighed according to the proportion, and placed in a grinder for mixing to obtain a mixed material II; S3: weighing a vulcanizing agent and sulfur according to a ratio, adding the mixed material I and the mixed material II, placing the mixed material in an open mill for a second mixing treatment, and obtaining an intermediate; S4: Raise the temperature to 88-93°C, add the accelerator DPTT weighed according to the ratio to the intermediate, perform the third mixing treatment, ventilate to reduce the temperature to 15-35°C, obtain chlorosulfonated polyethylene rubber, and pound the chlorosulfonated polyethylene rubber, make triangle packages and rolls 4 times respectively, mix them evenly, and put them into sheets.

7. The method according to claim 6, wherein: In step S1, the conditions of the first mixing treatment are as follows: the mixing time is 8-12 minutes and the mixing temperature is 65-75°C.

8. The method according to claim 6, wherein: In step S2, the mixing treatment conditions are as follows: the rotation speed is 80-120 r / min and the time is 20-30 min.

9. The method according to claim 6, wherein: In step S3, the second mixing treatment conditions are as follows: temperature is 75-85° C., and time is 3-4 min.

10. The method according to claim 6, wherein: In step S4, the conditions of the third mixing treatment are as follows: the temperature is 88-93° C. and the time is 1-3 min.

11. A tensile and extrusion resistant watertight cable prepared by the method according to any one of claims 1 to 10, characterized in that: The tensile and compression resistant watertight cable includes a conductor, an insulating layer, a tensile layer, an inner sheath and an outer sheath from the inside to the outside; The inner sheath is coated on the outer side of the cable core, the anti-tension layer is wound around the outer side of the inner sheath, and the outer sheath is coated on the outer side of the anti-tension layer; wherein the cable core includes a conductor and an insulating layer.

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