Flame-retardant elastomer-containing optical cable strength core
By setting a composite reinforcing shell on the outer surface of the optical cable reinforcing core, and using aramid fiber and glass fiber to reinforce the structure, a porous carbon layer is formed to block heat conduction and provide a halogen-free flame retardant barrier. This solves the problems of excessive rigidity and insufficient flame retardancy of traditional optical cable reinforcing cores, and achieves high-efficiency heat insulation, flame retardancy and improved flexibility.
Patent Information
- Application Number
- CN202522106902.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-30
AI Technical Summary
Traditional optical cable reinforcing cores are too rigid, resulting in a large bending radius and weak flame retardancy, making it impossible to avoid breakage when laid in narrow spaces. At the same time, the heavy weight of the metal material makes it susceptible to corrosion and it does not have flame-retardant self-extinguishing capabilities.
A composite reinforcing shell is set on the outer surface of the optical cable reinforcing core, including a mechanical support layer, a fiber reinforcement layer, a heat conduction barrier layer, a flame-retardant elastic layer, and an aging resistance layer. The core load-bearing capacity is provided by using aramid fiber bundles and glass fiber to reinforce the TPU matrix. A porous carbon layer is formed by EG organic modified zirconium phosphate to block heat conduction. A halogen-free flame-retardant elastomer matrix is formed by melt blending ammonium polyphosphate and aluminum hydroxide. Combined with CSM substrate, a flame-retardant barrier is formed.
It significantly improves the tensile and load-bearing performance of the optical cable reinforcing core, provides efficient heat insulation and flame retardant protection, enhances flexibility and weather resistance, and adapts to diverse application scenarios.
Smart Images
Figure CN224682444U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical cable reinforcing core technology, and in particular to optical cable reinforcing core containing flame-retardant elastomer. Background Technology
[0002] Optical cables are manufactured to meet optical, mechanical, or environmental performance specifications. They are communication cable assemblies that use one or more optical fibers encased in a protective sheath as the transmission medium and can be used individually or in groups.
[0003] The fiber optic cable reinforcing core is the core supporting component inside the fiber optic cable. It is mostly made of high-strength steel wire, aramid fiber, or glass fiber composite materials. It is usually located in the center of the fiber optic cable or arranged in layers. Its main function is to enhance the tensile and bending resistance of the fiber optic cable, prevent the internal optical fibers from being compressed or broken due to external forces such as laying tension and environmental loads, and maintain the structural stability of the fiber optic cable. It is suitable for laying scenarios such as aerial, underground, and pipeline, and ensures that the transmission performance of optical fibers is not affected by mechanical damage. It is a key structure for the reliable operation of fiber optic cables in complex environments.
[0004] Traditional optical cable reinforcing cores are mostly made of glass fiber reinforced plastic or metal materials. FRP is easy to decompose at high temperatures, has a generally low flame retardant rating, and its excessive rigidity results in a large bending radius, making it prone to breakage when laid in narrow spaces. Although metal materials have high strength, they are heavy, easily corroded, and do not have flame retardant self-extinguishing capabilities.
[0005] Therefore, it is necessary to provide optical cable reinforcing cores containing flame-retardant elastomers to solve the above-mentioned technical problems. Utility Model Content
[0006] This invention provides an optical cable reinforcing core containing a flame-retardant elastomer, which solves the problem that the rigidity of traditional optical cable reinforcing cores leads to a large bending radius and weak flame-retardant ability.
[0007] To solve the above-mentioned technical problems, the optical cable reinforcing core containing flame-retardant elastomer provided by this utility model includes: a reinforcing core body;
[0008] A composite reinforced shell is disposed on the outer surface of a reinforcing core body. The composite reinforced shell includes a mechanical support layer, a fiber reinforcement layer, a heat-conducting barrier layer, a flame-retardant elastic layer, and an aging-resistant layer. The fiber reinforcement layer is made of glass fiber reinforced TPU matrix and installed on the outer surface of the mechanical support layer. The heat-conducting barrier layer is made of a composite containing EG and organically modified zirconium phosphate and installed on the outer surface of the fiber reinforcement layer. The flame-retardant elastic layer is made of thermoplastic polyurethane as the matrix and is installed on the outer surface of the heat-conducting barrier layer by melt blending and compounding a halogen-free flame-retardant elastomer matrix of ammonium polyphosphate and aluminum hydroxide. The aging-resistant layer is made of CSM as the base material with added chlorinated paraffin and installed on the outer surface of the flame-retardant elastic layer. The axially arranged aramid fiber bundles of the mechanical support layer are installed on the outer surface of the reinforcing core body.
[0009] Two connecting components are respectively installed at both ends of the reinforcing core body;
[0010] The mechanical support layer is used to improve the tensile strength and structural integrity of the reinforcing core, providing basic mechanical support for the composite shell. The fiber reinforcement layer is used to bear the core load-bearing function, enhance the overall load-bearing capacity of the composite shell, and ensure the structural stability of the reinforcing core under stress. The heat-conducting barrier layer is used to form a porous worm-like char layer by EG expansion in high-temperature environments to block heat conduction. Organically modified zirconium phosphate fixes the char layer structure through solid acid catalysis, reduces char layer cracking during combustion, and enhances the heat insulation effect. The flame-retardant elastic layer has both flame-retardant protection and interface buffering functions, which can not only prevent the spread of flames, but also alleviate interlayer friction and impact. The elastomer matrix ensures the overall flexibility of the composite shell and facilitates installation. The anti-aging layer uses chlorinated paraffin with high chlorine content to form a flame-retardant barrier.
[0011] Preferably, the connecting assembly includes a fixing head and a mounting bracket, the fixing head being used to mount the mounting bracket to both ends of the reinforcing core body;
[0012] The mounting bracket is L-shaped with holes on its outer surface to facilitate the passage of bolts.
[0013] Preferably, a monitoring component is installed on the outer surface of the reinforcing core body near one end, and a protective component is installed on the outer surface of the monitoring component;
[0014] The protective component covers the outer surface of the monitoring component at the top.
[0015] Preferably, the monitoring component includes a fixing structure, a mounting hole, and a monitoring component. The fixing structure is mounted on the outer surface of the reinforcing core body, the mounting hole is formed on the outer surface of the fixing structure, and the monitoring component is mounted on the outer surface of the fixing structure.
[0016] The monitoring end of the monitoring component passes through the mounting hole and contacts the outer surface of the reinforcing core body.
[0017] Preferably, the protective component includes a protective structure and a mounting structure, wherein the mounting structure is used to fix the protective structure to the outer surface of the monitoring component;
[0018] The mounting structure is located on the front and back of the protective structure, at the bottom.
[0019] Preferably, the thickness of the mechanical support layer is 2.2-3 mm, the thickness of the fiber reinforcement layer and the heat-conducting barrier layer is 1.2-1.5 mm, and the thickness of the flame-retardant elastic layer and the aging-resistant layer is 0.3-0.5 mm.
[0020] Preferably, the reinforcing core body has through-holes at both ends for heat dissipation, and an inner protective shell is provided inside the heat dissipation holes;
[0021] The internal protective shell can help dissipate heat, retard flames, and resist corrosion.
[0022] Preferably, the inner protective shell includes a thermally conductive layer and an inner protective layer, wherein the inner protective layer is made of thermally conductive epoxy resin and installed on the inner surface of the thermally conductive layer.
[0023] Compared with related technologies, the optical cable reinforcing core containing flame-retardant elastomer provided by this utility model has the following beneficial effects:
[0024] This invention provides an optical cable reinforcing core containing a flame-retardant elastomer. To improve the flame-retardant effect of the reinforcing core, a composite reinforcing shell composed of a mechanical support layer, a fiber reinforcement layer, a heat-conducting barrier layer, a flame-retardant elastic layer, and an anti-aging layer is provided on the outer surface of the reinforcing core body. Axially arranged aramid fiber bundles in a parallel arrangement form the core skeleton, constituting the support layer and improving tensile strength and overall performance. Simultaneously, glass fiber in the fiber reinforcement layer reinforces the TPU matrix, providing core load-bearing capacity. Furthermore, EG organic-modified zirconium phosphate in the heat-conducting barrier layer allows EG to expand at high temperatures, forming a porous, worm-like char layer that blocks heat conduction. Solid acid catalysis fixes the char layer structure, reducing char layer cracking during combustion. The flame-retardant elastic layer is made of thermoplastic polyurethane as the matrix, formed through melt bonding... The technology uniformly blends ammonium polyphosphate and aluminum hydroxide flame retardants to form a halogen-free flame-retardant elastomer matrix, which combines flame retardant protection and interface buffering functions. The elastomer matrix ensures overall flexibility. Finally, the anti-aging layer uses CSM as the base material and adds chlorinated paraffin, which forms a flame-retardant barrier by utilizing its high chlorine content. At the same time, it relies on the excellent ozone resistance and weather resistance of CSM to resist environmental aging. This design utilizes aramid fiber and glass fiber reinforcement structure to significantly improve the tensile and load-bearing performance of the optical cable reinforcing core. EG organic modified zirconium phosphate and composite flame-retardant elastomer work synergistically to form a highly efficient heat insulation and flame-retardant barrier, reducing char layer cracking. The CSM anti-aging layer enhances weather resistance and environmental adaptability, achieving flame retardancy, buffering, flexibility and durability in one, comprehensively improving the overall performance of the reinforcing core and adapting to various application scenarios. Attached Figure Description
[0025] Figure 1 A schematic diagram of the structure of the first embodiment of the optical cable reinforcing core containing a flame-retardant elastomer provided by this utility model;
[0026] Figure 2 A structural schematic diagram of the composite reinforced shell is provided for this utility model;
[0027] Figure 3 Provided for this utility model Figure 2 An enlarged view of point A shown;
[0028] Figure 4 Provided for this utility model Figure 2 An enlarged view of point B shown;
[0029] Figure 5 A schematic diagram of the structure of the second embodiment of the optical cable reinforcing core containing a flame-retardant elastomer provided by this utility model;
[0030] Figure 6 A schematic diagram of the structure of the heat-conducting layer provided for this utility model.
[0031] The diagram is labeled as follows: 1. Reinforcing core body; 2. Composite reinforced outer shell; 201. Mechanical support layer; 202. Fiber reinforcement layer; 203. Heat conduction barrier layer; 204. Flame retardant elastic layer; 205. Aging resistance layer; 3. Monitoring component; 301. Fixing structure; 302. Mounting hole; 303. Monitoring part; 4. Connecting component; 401. Fixing head; 402. Mounting bracket; 5. Protective component; 501. Protective structure; 502. Mounting structure; 6. Inner protective shell; 601. Thermal conductive layer; 602. Inner protective layer; 7. Heat dissipation hole. Detailed Implementation
[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0033] First Embodiment
[0034] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 ,in, Figure 1 A schematic diagram of the structure of the first embodiment of the optical cable reinforcing core containing a flame-retardant elastomer provided by this utility model; Figure 2 A structural schematic diagram of the composite reinforced shell is provided for this utility model; Figure 3 Provided for this utility model Figure 2 An enlarged view of point A shown; Figure 4 Provided for this utility model Figure 2 The enlarged view at point B is shown. The optical cable reinforcing core containing flame-retardant elastomer includes: reinforcing core body 1;
[0035] A composite reinforced outer shell 2 is disposed on the outer surface of the reinforcing core body 1. The composite reinforced outer shell 2 includes a mechanical support layer 201, a fiber reinforcement layer 202, a heat-conducting barrier layer 203, a flame-retardant elastic layer 204, and an aging-resistant layer 205. The fiber reinforcement layer 202 is made of glass fiber reinforced TPU matrix and installed on the outer surface of the mechanical support layer 201. The heat-conducting barrier layer 203 is made of a composite containing EG and organic modified zirconium phosphate and installed on the outer surface of the fiber reinforcement layer 202. The flame-retardant elastic layer 204 is made of thermoplastic polyurethane as matrix and is installed on the outer surface of the heat-conducting barrier layer 203 by melt blending and compounding ammonium polyphosphate and aluminum hydroxide into a halogen-free flame-retardant elastomer matrix. The aging-resistant layer 205 is made of CSM as base material with added chlorinated paraffin and installed on the outer surface of the flame-retardant elastic layer 204. The axially arranged aramid fiber bundles of the mechanical support layer 201 are installed on the outer surface of the reinforcing core body 1.
[0036] Two connecting components 4 are respectively installed at both ends of the reinforcing core body 1;
[0037] The mechanical support layer 201 is used to improve the tensile strength and structural integrity of the reinforcing core, providing basic mechanical support for the composite shell. The fiber reinforcement layer 202 is used to bear the core load-bearing function, enhance the overall load-bearing capacity of the composite shell, and ensure the structural stability of the reinforcing core under stress. The heat conduction barrier layer 203 is used to form a porous worm-like char layer by EG expansion in high-temperature environments to block heat conduction. Organic modified zirconium phosphate fixes the char layer structure through solid acid catalysis, reduces char layer cracking during combustion, and enhances the heat insulation effect. The flame-retardant elastic layer 204 has both flame-retardant protection and interface buffering functions, which can prevent the spread of flames and alleviate interlayer friction and impact. The elastomer matrix ensures the overall flexibility of the composite shell and facilitates installation. The anti-aging layer 205 uses the high chlorine content of chlorinated paraffin to form a flame-retardant barrier, enhances the overall flame retardancy, and relies on the excellent ozone resistance and weather resistance of CSM to resist aging in the external environment and extend the service life of the reinforcing core. The connecting components 4 are installed at both ends of the reinforcing core body 1.
[0038] Please refer to Figure 1 , Figure 2 and Figure 3 The connecting assembly 4 includes a fixing head 401 and a mounting bracket 402. The fixing head 401 is used to mount the mounting bracket 402 to both ends of the reinforcing core body 1.
[0039] Mounting bracket 402 has holes on its L-shaped outer surface to facilitate the passage of bolts.
[0040] Please refer to Figure 1 A monitoring component 3 is installed on the outer surface of the reinforcing core body 1 near one end, and a protective component 5 is installed on the outer surface of the monitoring component 3.
[0041] The protective component 5 covers the outer surface of the monitoring component 3 at the top position, thus providing protection.
[0042] Please refer to Figure 1 , Figure 2 and Figure 4 The monitoring component 3 includes a fixing structure 301, a mounting hole 302, and a monitoring component 303. The fixing structure 301 is installed on the outer surface of the reinforcing core body 1, the mounting hole 302 is opened on the outer surface of the fixing structure 301, and the monitoring component 303 is installed on the outer surface of the fixing structure 301.
[0043] The monitoring end of the monitoring component 303 passes through the mounting hole 302 and contacts the outer surface of the reinforcing core body 1, and is used to monitor current, voltage or heat.
[0044] Please refer to Figure 1 , Figure 2 and Figure 4 The protective component 5 includes a protective structure 501 and a mounting structure 502, wherein the mounting structure 502 is used to fix the protective structure 501 to the outer surface of the monitoring component 3.
[0045] Mounting structure 502 is located on the front and back of protective structure 501 at the bottom. Mounting structure 502 includes protrusions and bolts. Protective structure 501 covers monitoring component 303.
[0046] The mechanical support layer 201 has a thickness of 2.2-3 mm, the fiber reinforcement layer 202 and the heat-conducting barrier layer 203 have a thickness of 1.2-1.5 mm, and the flame-retardant elastic layer 204 and the aging-resistant layer 205 have a thickness of 0.3-0.5 mm.
[0047] The working principle of the optical cable reinforcing core containing flame-retardant elastomer provided by this utility model is as follows:
[0048] A composite reinforced outer shell 2, consisting of a mechanical support layer 201, a fiber reinforcement layer 202, a heat-conducting barrier layer 203, a flame-retardant elastic layer 204, and an aging-resistant layer 205, is provided on the outer surface of the reinforced core body 1. The core skeleton, consisting of axially arranged aramid fiber bundles in a parallel arrangement, forms the support layer 201, improving tensile strength and overall performance. Simultaneously, the TPU matrix is reinforced with glass fibers in the fiber reinforcement layer 202, providing core load-bearing capacity. Furthermore, the EG organically modified zirconium phosphate in the heat-conducting barrier layer 203 allows the EG to expand at high temperatures, forming a porous, worm-like carbon layer. It blocks heat conduction and fixes the char layer structure through solid acid catalysis, reducing char layer cracking during combustion. Meanwhile, the flame-retardant elastic layer 204 is made of thermoplastic polyurethane as the matrix, and ammonium polyphosphate and aluminum hydroxide are uniformly compounded through melt blending technology to form a halogen-free flame-retardant elastomer matrix, which has the dual functions of flame retardant protection and interface buffering. The elastomer matrix ensures overall flexibility. Finally, the anti-aging layer 205 is made of CSM as the base material, with added chlorinated paraffin. Its high chlorine content forms a flame-retardant barrier, while relying on the excellent ozone resistance and weather resistance of CSM to resist environmental aging.
[0049] Compared with related technologies, the optical cable reinforcing core containing flame-retardant elastomer provided by this utility model has the following beneficial effects:
[0050] To improve the flame-retardant effect of the optical cable reinforcing core, a composite reinforcing shell 2 is provided on the outer surface of the reinforcing core body 1. This shell consists of a mechanical support layer 201, a fiber reinforcement layer 202, a heat-conducting barrier layer 203, a flame-retardant elastic layer 204, and an aging-resistant layer 205. The core skeleton of the support layer 201 is formed by axially arranged aramid fiber bundles in a parallel arrangement, improving tensile strength and overall performance. Simultaneously, the TPU matrix is reinforced with glass fiber in the fiber reinforcement layer 202, providing core load-bearing capacity. Furthermore, the EG organic-modified zirconium phosphate in the heat-conducting barrier layer 203 allows the EG to expand at high temperatures, forming a porous, worm-like char layer that blocks heat conduction. The char layer structure is also fixed through solid acid catalysis, reducing char layer cracking during combustion. The flame-retardant elastic layer 204 is made of thermoplastic polyurethane as a matrix, and... The melt blending technology uniformly combines ammonium polyphosphate and aluminum hydroxide flame retardants to form a halogen-free flame-retardant elastomer matrix, which has the dual functions of flame retardant protection and interface buffering. The elastomer matrix ensures overall flexibility. Finally, the anti-aging layer 205 uses CSM as the base material and adds chlorinated paraffin. Its high chlorine content forms a flame-retardant barrier. At the same time, it relies on the excellent ozone resistance and weather resistance of CSM to resist environmental aging. Through this design, the tensile and load-bearing performance of the optical cable reinforcing core is significantly improved by using aramid fiber and glass fiber reinforcement structure. The EG organic modified zirconium phosphate and composite flame-retardant elastomer work synergistically to form an efficient heat insulation and flame-retardant barrier, reducing char layer cracking. The CSM anti-aging layer enhances weather resistance and environmental adaptability, realizing the integration of flame retardancy, buffering, flexibility and durability, comprehensively improving the overall performance of the reinforcing core and adapting to various application scenarios.
[0051] Second Embodiment
[0052] Please refer to the following: Figures 5-6 , Figure 5 A schematic diagram of the structure of the second embodiment of the optical cable reinforcing core containing a flame-retardant elastomer provided by this utility model; Figure 6 This utility model provides a structural schematic diagram of a heat-conducting layer. Based on the first embodiment of this application, which provides an optical cable reinforcing core containing a flame-retardant elastomer, the second embodiment of this application proposes an optical cable reinforcing core further containing a flame-retardant elastomer. The second embodiment is merely a preferred embodiment of the first embodiment, and its implementation will not affect the separate implementation of the first embodiment.
[0053] Specifically, the difference between the second embodiment of this application and the optical cable reinforcing core containing flame-retardant elastomer is that, please refer to... Figure 5 The reinforcing core body 1 has through heat dissipation holes 7 at both ends, and an inner protective shell 6 is provided inside the heat dissipation holes 7.
[0054] The inner protective shell 6 can assist in heat dissipation, flame retardancy, and corrosion resistance.
[0055] Please refer to Figure 5 and Figure 6 The inner protective shell 6 includes a thermally conductive layer 601 and an inner protective layer 602. The inner protective layer 602 is made of thermally conductive epoxy resin and installed on the inner surface of the thermally conductive layer 601.
[0056] The thermal conductive layer 601 is made of aluminum sheet, and the thermal conductive layer 601 is bonded to the inner surface of the heat dissipation hole 7.
[0057] Compared with related technologies, the optical cable reinforcing core containing flame-retardant elastomer provided by this utility model has the following beneficial effects:
[0058] To enhance the heat dissipation of the reinforcing core body 1, a through-hole 7 is opened at both ends of the reinforcing core body 1. Then, the surface of the heat dissipation hole 7 is protected by an inner protective shell 6 composed of a thermally conductive layer 601 and an inner protective layer 602. This design greatly improves the heat dissipation of the reinforcing core body 1.
[0059] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. An optical cable reinforcing core containing a flame-retardant elastomer, characterized in that, include: Strengthen the core body; A composite reinforced shell is disposed on the outer surface of a reinforcing core body. The composite reinforced shell includes a mechanical support layer, a fiber reinforcement layer, a heat-conducting barrier layer, a flame-retardant elastic layer, and an aging-resistant layer. The fiber reinforcement layer is made of glass fiber reinforced TPU matrix and installed on the outer surface of the mechanical support layer. The heat-conducting barrier layer is made of a composite containing EG and organically modified zirconium phosphate and installed on the outer surface of the fiber reinforcement layer. The flame-retardant elastic layer is made of thermoplastic polyurethane as the matrix and is installed on the outer surface of the heat-conducting barrier layer by melt blending and compounding a halogen-free flame-retardant elastomer matrix of ammonium polyphosphate and aluminum hydroxide. The aging-resistant layer is made of CSM as the base material with added chlorinated paraffin and installed on the outer surface of the flame-retardant elastic layer. The axially arranged aramid fiber bundles of the mechanical support layer are installed on the outer surface of the reinforcing core body. Two connecting components are respectively installed at both ends of the reinforcing core body.
2. The optical cable reinforcing core containing a flame-retardant elastomer according to claim 1, characterized in that, The connecting assembly includes a fixing head and a mounting bracket, the fixing head being used to mount the mounting bracket to both ends of the reinforcing core body.
3. The optical cable reinforcing core containing a flame-retardant elastomer according to claim 1, characterized in that, A monitoring component is installed on the outer surface of the reinforcing core body near one end, and a protective component is installed on the outer surface of the monitoring component.
4. The optical cable reinforcing core containing a flame-retardant elastomer according to claim 3, characterized in that, The monitoring component includes a fixing structure, mounting holes, and monitoring components. The fixing structure is mounted on the outer surface of the reinforcing core body, the mounting holes are formed on the outer surface of the fixing structure, and the monitoring components are mounted on the outer surface of the fixing structure.
5. The optical cable reinforcing core containing a flame-retardant elastomer according to claim 3, characterized in that, The protective component includes a protective structure and a mounting structure, wherein the mounting structure is used to fix the protective structure to the outer surface of the monitoring component.
6. The optical cable reinforcing core containing a flame-retardant elastomer according to claim 1, characterized in that, The thickness of the mechanical support layer is 2.2-3 mm, the thickness of the fiber reinforcement layer and the heat-conducting barrier layer is 1.2-1.5 mm, and the thickness of the flame-retardant elastic layer and the aging-resistant layer is 0.3-0.5 mm.
7. The optical cable reinforcing core containing a flame-retardant elastomer according to claim 1, characterized in that, The reinforcing core body has through-holes at both ends for heat dissipation, and an inner protective shell is installed inside the heat dissipation holes.
8. The optical cable reinforcing core containing a flame-retardant elastomer according to claim 7, characterized in that, The inner protective shell includes a thermally conductive layer and an inner protective layer. The inner protective layer is made of thermally conductive epoxy resin and installed on the inner surface of the thermally conductive layer.