CN114242322A - High-flexibility polyurethane towline cable and preparation method thereof - Google Patents
High-flexibility polyurethane towline cable and preparation method thereof Download PDFInfo
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- CN114242322A CN114242322A CN202111629242.3A CN202111629242A CN114242322A CN 114242322 A CN114242322 A CN 114242322A CN 202111629242 A CN202111629242 A CN 202111629242A CN 114242322 A CN114242322 A CN 114242322A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
- H01B7/041—Flexible cables, conductors, or cords, e.g. trailing cables attached to mobile objects, e.g. portable tools, elevators, mining equipment, hoisting cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
- H01B7/045—Flexible cables, conductors, or cords, e.g. trailing cables attached to marine objects, e.g. buoys, diving equipment, aquatic probes, marine towline
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2813—Protection against damage caused by electrical, chemical or water tree deterioration
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- Ocean & Marine Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Abstract
The invention relates to the technical field of towline cables, in particular to a high-flexibility polyurethane towline cable and a preparation method thereof. The device comprises the following parts: the cable comprises a conductor, an insulating layer, a filling layer, an inner sheath, a shielding layer and an outer sheath; the outer sheath at least comprises the following raw materials: polyether polyurethane elastomer, chlorinated polyethylene, modified copolymer, flame retardant and optimizing agent; according to the high-flexibility polyurethane towline cable and the preparation method thereof, the polyurethane elastomer with high flexibility is selected for use, and the flame retardant is added to improve the flame retardant property of the outer sheath material; the added chlorinated polyethylene can improve weather resistance, ozone resistance, chemical resistance and aging resistance of the outer sheath, and can be matched with mica powder, aluminum hydroxide and nano antimony trioxide in a flame retardant in an optimizing agent to obtain a flame-retardant material with excellent flame-retardant property, so that the flame-retardant property of the outer sheath is further improved.
Description
Technical Field
The invention relates to the technical field of towline cables, in particular to a high-flexibility polyurethane towline cable and a preparation method thereof.
Background
The drag chain cable is named after being applied to a drag chain box and has the characteristics of bending property, moving flexibility, wear resistance, oil resistance, tensile resistance and the like; the towline cable is mainly applied to occasions needing to move back and forth in a reciprocating manner, such as an industrial automation system, a production line system, a welding robot, a submersible, a carrying robot, a numerical control machine tool, the metallurgical industry and the like; because the towline cable needs to have higher flexibility, materials such as polyethylene, polyvinyl chloride are not suitable, the polyurethane elastomer with the high-flexibility function is adopted as the best, and the towline cable has the characteristics of high strength, high elasticity, high flexibility and wear resistance, but has poorer flame retardant property.
Disclosure of Invention
The invention aims to provide a high-flexibility polyurethane towline cable and a preparation method thereof, so as to solve the problems in the background technology.
To achieve the above objects, in one aspect, the present invention provides a highly flexible polyurethane towline cable, comprising: the cable comprises a conductor, an insulating layer, a filling layer, an inner sheath, a shielding layer and an outer sheath;
the outer sheath at least comprises the following raw materials in parts by weight: 80-120 parts of polyether type polyurethane elastomer, 5-10 parts of chlorinated polyethylene, 10-20 parts of modified copolymer, 1-5 parts of flame retardant and 1-5 parts of optimizing agent.
As a further improvement of the technical scheme, the modified copolymer is at least one selected from ethylene-vinyl acetate copolymer and ethylene-ethyl acrylate copolymer, and the processability of the polyurethane is poor and the extrusion is not facilitated, so that the processability of the polyurethane elastomer is improved by adding the modified copolymer.
As a further improvement of the technical scheme, the flame retardant is selected from one or a mixture of more of nano antimony trioxide, tributyl phosphate, dipentaerythritol diphosphite, tricresyl phosphate, borate and nano magnesium hydroxide, and the polyurethane elastomer has the characteristics of high strength, high elasticity, high flexibility and wear resistance but poor flame retardant property, so that the flame retardant property of the outer sheath material can be improved by adding the flame retardant, and meanwhile, the dipentaerythritol diphosphite in the flame retardant not only has flame retardance but also has hydrolysis resistance, so that the hydrolysis resistance of the outer sheath is further improved.
As a further improvement of the technical scheme, the optimizing agent is selected from at least one of mica powder, talcum powder and aluminum hydroxide, and the mechanical property and the flame retardant property of the polyurethane elastomer can be improved by adding the optimizing agent.
As a further improvement of the technical scheme, the insulating layer and the inner sheath are both prepared from a polyethylene-butadiene acrylonitrile rubber blending material, the polyethylene has good water resistance and electric power performance, the butadiene acrylonitrile rubber has good elasticity and bending performance, and the blending material formed by mixing the polyethylene and the butadiene acrylonitrile rubber is suitable for being used by a towline cable.
As a further improvement of the technical scheme, the filling layer is made of a polyester non-woven fabric material.
As a further improvement of the technical scheme, the shielding layer is a tinned copper wire braided shield, and the density of the shielding layer is 88-95%.
In another aspect, the present invention provides a method for preparing a highly flexible polyurethane towline cable as described in any one of the above, comprising the steps of:
s1, adding the polyether polyurethane elastomer, the chlorinated polyethylene, the modified copolymer, the flame retardant and the optimizing agent into an internal mixer, and heating to 50-70 ℃ for stirring;
s2, after uniformly stirring, heating to 80-120 ℃, increasing the stirring speed, and continuously stirring until the mixture is fully swelled to obtain a mixture;
s3, adding the mixture into a double-screw extruder for extrusion to obtain an outer sheath;
and S4, assembling the conductor, the insulating layer, the filling layer, the inner sheath, the shielding layer and the outer sheath to obtain the drag chain cable.
Preferably, in the S1, the stirring speed is 40-70 r/min; in the S2, the stirring speed is 120-180 r/min.
Preferably, in the S3, the extrusion thickness is 5-10mm, and the inner diameter is 80-100 mm.
The chlorinated polyethylene has the effects of improving weather resistance, ozone resistance, chemical resistance and aging resistance of the outer sheath, and can be matched with mica powder, aluminum hydroxide and nano antimony trioxide in a flame retardant in an optimizing agent to obtain a flame-retardant material with excellent flame-retardant property, so that the flame-retardant property of the outer sheath is further improved.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the high-flexibility polyurethane towline cable and the preparation method thereof, the polyurethane elastomer with high flexibility is selected for use, the flame retardant is added, so that the flame retardant property of the outer sheath material can be improved, and meanwhile, the dipentaerythritol diphosphite in the flame retardant has flame retardancy and hydrolysis resistance, so that the hydrolysis resistance of the outer sheath is further improved.
2. In the high-flexibility polyurethane towline cable and the preparation method thereof, the chlorinated polyethylene added can improve the weather resistance, ozone resistance, chemical resistance and aging resistance of the outer sheath, and meanwhile, the chlorinated polyethylene is matched with mica powder, aluminum hydroxide and nano antimony trioxide in a flame retardant in an optimizing agent, so that a flame retardant material with excellent flame retardant property can be obtained, and the flame retardant property of the outer sheath is further improved.
Drawings
Fig. 1 is an overall flow diagram of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1 a high-flexibility polyurethane towline cable and a method for making the same, comprising:
first, preparation of outer sheath
1. Adding 80 parts of polyether type polyurethane elastomer, 5 parts of chlorinated polyethylene, 10 parts of modified copolymer, 1 part of flame retardant and 1 part of optimizing agent into an internal mixer, heating to 50 ℃, and stirring at the stirring speed of 40 r/min;
2. after stirring uniformly, heating to 80 ℃, increasing the stirring speed to 120r/min, and continuously stirring until the mixture is fully swelled to obtain a mixture;
3. then adding the mixture into a double-screw extruder for extrusion to obtain an outer sheath, wherein the extrusion thickness is 5-10mm, and the inner diameter is 80-100 mm;
preparation of tow chain cable
And assembling the conductor, the insulating layer, the filling layer, the inner sheath, the shielding layer and the outer sheath to obtain the drag chain cable.
Embodiment 2 a high-flexibility polyurethane towline cable and a preparation method thereof, comprising:
first, preparation of outer sheath
1. Adding 90 parts of polyether type polyurethane elastomer, 7 parts of chlorinated polyethylene, 13 parts of modified copolymer, 2 parts of flame retardant and 2 parts of optimizing agent into an internal mixer, heating to 50 ℃, and stirring at the stirring speed of 50 r/min;
2. after stirring uniformly, heating to 90 ℃, increasing the stirring speed to 140r/min, and continuously stirring until the mixture is fully swelled to obtain a mixture;
3. then adding the mixture into a double-screw extruder for extrusion to obtain an outer sheath, wherein the extrusion thickness is 5-10mm, and the inner diameter is 80-100 mm;
preparation of tow chain cable
And assembling the conductor, the insulating layer, the filling layer, the inner sheath, the shielding layer and the outer sheath to obtain the drag chain cable.
Embodiment 3 a high-flexibility polyurethane towline cable and a preparation method thereof, comprising:
first, preparation of outer sheath
1. Adding 100 parts of polyether type polyurethane elastomer, 8 parts of chlorinated polyethylene, 15 parts of modified copolymer, 3 parts of flame retardant and 3 parts of optimizing agent into an internal mixer, heating to 60 ℃, and stirring at the stirring speed of 60 r/min;
2. after stirring uniformly, heating to 100 ℃, increasing the stirring speed to 160r/min, and continuously stirring until the mixture is fully swelled to obtain a mixture;
3. then adding the mixture into a double-screw extruder for extrusion to obtain an outer sheath, wherein the extrusion thickness is 5-10mm, and the inner diameter is 80-100 mm;
preparation of tow chain cable
And assembling the conductor, the insulating layer, the filling layer, the inner sheath, the shielding layer and the outer sheath to obtain the drag chain cable.
Embodiment 4 high flexibility polyurethane towline cable and preparation method thereof, including:
first, preparation of outer sheath
1. Adding 110 parts of polyether type polyurethane elastomer, 9 parts of chlorinated polyethylene, 17 parts of modified copolymer, 4 parts of flame retardant and 4 parts of optimizing agent into an internal mixer, heating to 70 ℃, and stirring at the stirring speed of 70 r/min;
2. after stirring uniformly, heating to 110 ℃, increasing the stirring speed to 170r/min, and continuously stirring until the mixture is fully swelled to obtain a mixture;
3. then adding the mixture into a double-screw extruder for extrusion to obtain an outer sheath, wherein the extrusion thickness is 5-10mm, and the inner diameter is 80-100 mm;
preparation of tow chain cable
And assembling the conductor, the insulating layer, the filling layer, the inner sheath, the shielding layer and the outer sheath to obtain the drag chain cable.
Example 5 a highly flexible polyurethane towline cable and method of making the same, comprising:
first, preparation of outer sheath
1. Adding 120 parts of polyether type polyurethane elastomer, 10 parts of chlorinated polyethylene, 20 parts of modified copolymer, 5 parts of flame retardant and 5 parts of optimizing agent into an internal mixer, heating to 70 ℃, and stirring at the stirring speed of 70 r/min;
2. after stirring uniformly, heating to 120 ℃, increasing the stirring speed to 180r/min, and continuously stirring until the mixture is fully swelled to obtain a mixture;
3. then adding the mixture into a double-screw extruder for extrusion to obtain an outer sheath, wherein the extrusion thickness is 5-10mm, and the inner diameter is 80-100 mm;
preparation of tow chain cable
And assembling the conductor, the insulating layer, the filling layer, the inner sheath, the shielding layer and the outer sheath to obtain the drag chain cable.
In the above examples 1 to 5, the modified copolymer is selected from at least one of ethylene-vinyl acetate copolymer and ethylene-ethyl acrylate copolymer, and the processability of polyurethane is poor, which is not beneficial to extrusion, so the processability of polyurethane elastomer is improved by adding the modified copolymer;
the flame retardant is selected from one or more of nano antimony trioxide, tributyl phosphate, dipentaerythritol diphosphite, tricresyl phosphate, borate and nano magnesium hydroxide, and the polyurethane elastomer has the characteristics of high strength, high elasticity, high flexibility and wear resistance, but has poor flame retardant performance, so that the flame retardant performance of the outer sheath material can be improved by adding the flame retardant, and the dipentaerythritol diphosphite in the flame retardant not only has flame retardance but also has hydrolysis resistance, so that the hydrolysis resistance of the outer sheath is further improved;
the optimizing agent is selected from at least one of mica powder, talcum powder and aluminum hydroxide, and the mechanical property and the flame retardant property of the polyurethane elastomer can be improved by adding the optimizing agent;
the insulating layer and the inner sheath are both prepared from polyethylene-butadiene acrylonitrile rubber blending materials, the polyethylene has better water resistance and electric power performance, the butadiene acrylonitrile rubber has better elasticity and bending performance, and the blending material formed by mixing the insulating layer and the inner sheath is suitable for being used by a towline cable;
the filling layer is made of polyester non-woven fabric material;
the shielding layer is a tinned copper wire braided shield, and the density of the shielding layer is 88-95%;
the chlorinated polyethylene has the effects of improving weather resistance, ozone resistance, chemical resistance and aging resistance of the outer sheath, and can be matched with mica powder, aluminum hydroxide and nano antimony trioxide in a flame retardant in an optimizing agent to obtain a flame-retardant material with excellent flame-retardant property, so that the flame-retardant property of the outer sheath is further improved.
The high-flexibility polyurethane towline cable prepared by the invention has better flexibility and flame retardance, and the detection indexes of the high-flexibility polyurethane towline cable prepared by the invention are shown in table 1:
TABLE 1
| Flexible radius (mm) | Oxygen index (%) | Elongation at Break (%) | Stay cord strength Mpa) | |
| Example 1 | 9× | 28.5 | 220 | 16.7 |
| Example 2 | 10× | 31.0 | 222 | 17.1 |
| Example 3 | 12× | 33.5 | 232 | 16.8 |
| Example 4 | 12× | 32.5 | 239 | 16.1 |
| Example 5 | 12× | 32.0 | 241 | 16.0 |
As shown in Table 1, the flexibility radius of the cable is 9X or more in examples 1-5, and the flexibility radius of the conventional flexible cable is 7.5X, which shows that the cable of the present invention has high flexibility, wherein the oxygen index of examples 1-5 is 28.5-33.5, which shows that the cable of the present invention is a flame-retardant type standard.
Comparative example 1 a highly flexible polyurethane towline cable and method of making the same, comprising:
first, preparation of outer sheath
1. Adding 100 parts of polyether polyurethane elastomer, 15 parts of modified copolymer, 3 parts of flame retardant and 3 parts of optimizing agent into an internal mixer, heating to 60 ℃, and stirring at the stirring speed of 60 r/min;
2. after stirring uniformly, heating to 100 ℃, increasing the stirring speed to 160r/min, and continuously stirring until the mixture is fully swelled to obtain a mixture;
3. then adding the mixture into a double-screw extruder for extrusion to obtain an outer sheath, wherein the extrusion thickness is 5-10mm, and the inner diameter is 80-100 mm;
preparation of tow chain cable
And assembling the conductor, the insulating layer, the filling layer, the inner sheath, the shielding layer and the outer sheath to obtain the drag chain cable.
Comparative example 2 a highly flexible polyurethane towline cable and a method for making the same, comprising:
first, preparation of outer sheath
1. Adding 100 parts of polyether type polyurethane elastomer, 8 parts of chlorinated polyethylene, 15 parts of modified copolymer and 3 parts of optimizing agent into an internal mixer, heating to 60 ℃, and stirring at the stirring speed of 60 r/min;
2. after stirring uniformly, heating to 100 ℃, increasing the stirring speed to 160r/min, and continuously stirring until the mixture is fully swelled to obtain a mixture;
3. then adding the mixture into a double-screw extruder for extrusion to obtain an outer sheath, wherein the extrusion thickness is 5-10mm, and the inner diameter is 80-100 mm;
preparation of tow chain cable
And assembling the conductor, the insulating layer, the filling layer, the inner sheath, the shielding layer and the outer sheath to obtain the drag chain cable.
Comparative example 3 a highly flexible polyurethane towline cable and method of making the same, comprising:
first, preparation of outer sheath
1. Adding 100 parts of polyether type polyurethane elastomer, 8 parts of chlorinated polyethylene, 15 parts of modified copolymer and 3 parts of flame retardant into an internal mixer, heating to 60 ℃, and stirring at the stirring speed of 60 r/min;
2. after stirring uniformly, heating to 100 ℃, increasing the stirring speed to 160r/min, and continuously stirring until the mixture is fully swelled to obtain a mixture;
3. then adding the mixture into a double-screw extruder for extrusion to obtain an outer sheath, wherein the extrusion thickness is 5-10mm, and the inner diameter is 80-100 mm;
preparation of tow chain cable
And assembling the conductor, the insulating layer, the filling layer, the inner sheath, the shielding layer and the outer sheath to obtain the drag chain cable.
The high-flexibility polyurethane towline cable prepared by the invention has better flame retardance, has a great relationship with chlorinated polyethylene, flame retardant and optimizing agent added in the cable, and in order to verify the related technical scheme, the applicant performs the following tests:
comparative examples 1 to 3: by adopting the method of the embodiment 3, under the condition of removing the chlorinated polyethylene, the flame retardant and the optimizing agent, the relevant indexes of the prepared high-flexibility polyurethane towline cable are detected, and the concrete data are shown in table 2:
TABLE 2
| Flexible radius (mm) | Oxygen index (%) | Elongation at Break (%) | Stay cord strength Mpa) | |
| Comparative example 1 | 12× | 26.7 | 227 | 16.5 |
| Comparative example 2 | 12× | 22.3 | 230 | 16.9 |
| Comparative example 3 | 12× | 25.4 | 225 | 16.1 |
| Example 3 | 12× | 33.5 | 232 | 16.8 |
According to the table 1, compared with the example 3, in the comparative examples 1 to 3, the oxygen index of the cable is obviously reduced under the condition of removing the chlorinated polyethylene alone, the oxygen index of the cable is greatly reduced under the condition of removing the flame retardant alone, and the oxygen index of the cable is obviously reduced under the condition of removing the optimizing agent alone, so that the high-flexibility polyurethane towline cable prepared by the invention has better flame retardant property.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. High flexibility polyurethane tow chain cable, its characterized in that includes following part: the cable comprises a conductor, an insulating layer, a filling layer, an inner sheath, a shielding layer and an outer sheath;
the outer sheath at least comprises the following raw materials in parts by weight: 80-120 parts of polyether type polyurethane elastomer, 5-10 parts of chlorinated polyethylene, 10-20 parts of modified copolymer, 1-5 parts of flame retardant and 1-5 parts of optimizing agent.
2. The highly flexible polyurethane towline cable of claim 1, wherein: the modified copolymer is at least one selected from ethylene-vinyl acetate copolymer and ethylene-ethyl acrylate copolymer.
3. The highly flexible polyurethane towline cable of claim 1, wherein: the flame retardant is one or more of nano antimony trioxide, tributyl phosphate, dipentaerythritol diphosphite, tricresyl phosphate, borate and nano magnesium hydroxide.
4. The highly flexible polyurethane towline cable of claim 1, wherein: the optimizing agent is selected from at least one of mica powder, talcum powder and aluminum hydroxide.
5. The highly flexible polyurethane towline cable of claim 1, wherein: the insulating layer and the inner sheath are both made of polyethylene-butadiene-acrylonitrile rubber blending materials.
6. The highly flexible polyurethane towline cable of claim 1, wherein: the filling layer is made of polyester non-woven fabric materials.
7. The highly flexible polyurethane towline cable of claim 1, wherein: the shielding layer is a tinned copper wire braided shield, and the density of the shielding layer is 88-95%.
8. A method for preparing the highly flexible polyurethane towline cable according to any one of claims 1 to 7, comprising the steps of:
s1, adding the polyether polyurethane elastomer, the chlorinated polyethylene, the modified copolymer, the flame retardant and the optimizing agent into an internal mixer, and heating to 50-70 ℃ for stirring;
s2, after uniformly stirring, heating to 80-120 ℃, increasing the stirring speed, and continuously stirring until the mixture is fully swelled to obtain a mixture;
s3, adding the mixture into a double-screw extruder for extrusion to obtain an outer sheath;
and S4, assembling the conductor, the insulating layer, the filling layer, the inner sheath, the shielding layer and the outer sheath to obtain the drag chain cable.
9. The method for preparing the highly flexible polyurethane towline cable according to claim 8, wherein: in the S1, the stirring speed is 40-70 r/min; in the S2, the stirring speed is 120-180 r/min.
10. The method for preparing the highly flexible polyurethane towline cable according to claim 8, wherein: in the S3, the extrusion thickness is 5-10mm, and the inner diameter is 80-100 mm.
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| CN202111629242.3A CN114242322A (en) | 2021-12-28 | 2021-12-28 | High-flexibility polyurethane towline cable and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115482973A (en) * | 2022-10-08 | 2022-12-16 | 江苏洪能电缆有限公司 | Preparation process of flexible towline cable for military equipment |
| CN117457290A (en) * | 2023-11-01 | 2024-01-26 | 佛山市粤佳信电线电缆有限公司 | High-flexibility drag chain cable and forming process thereof |
-
2021
- 2021-12-28 CN CN202111629242.3A patent/CN114242322A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115482973A (en) * | 2022-10-08 | 2022-12-16 | 江苏洪能电缆有限公司 | Preparation process of flexible towline cable for military equipment |
| CN117457290A (en) * | 2023-11-01 | 2024-01-26 | 佛山市粤佳信电线电缆有限公司 | High-flexibility drag chain cable and forming process thereof |
| CN117457290B (en) * | 2023-11-01 | 2024-04-16 | 佛山市粤佳信电线电缆有限公司 | High-flexibility drag chain cable and forming process thereof |
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