Bending-resistant and low-temperature-resistant plastic optical fiber cable

Abstract

The utility model relates to a bending-resistant and low-temperature-resistant plastic optical fiber cable, which comprises a stretch-resistant wire core, a plurality of optical fiber wire cores are fixed on the outer surface of the stretch-resistant wire core, and a protection mechanism for improving the protection capability of the optical fiber wire cores is arranged on the outer side of the optical fiber wire cores; the protection mechanism comprises an inner protection layer arranged on the outer side of the optical fiber cable core, a buffer layer is arranged on the outer side of the inner protection layer, a waterproof layer is arranged on the outer side of the buffer layer, a low-temperature-resistant layer is arranged on the outer side of the waterproof layer, and a tensile layer is arranged on the outer side of the low-temperature-resistant layer. According to the bending-resistant and low-temperature-resistant plastic optical fiber cable, the protection mechanisms are arranged on the outer surfaces of the tensile wire cores and the optical fiber wire cores, so that the plastic optical fiber cable has the functions of buffer protection, water resistance, low temperature resistance, tensile resistance, corrosion resistance and wear resistance, and the service life of the plastic optical fiber cable is protected; and the influence on the use experience of a user caused by signal attenuation at low temperature is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic optical fiber cable, concretely to a plastic optical fiber cable of bending resistance and low temperature resistance. BACKGROUND

[0002] The plastic optical fiber cable is made of high-transparency polymers such as polystyrene (PS), polymethyl methacrylate (PMMA), polycarbonate (PC), etc. as core layer material, PMMA, fluoroplastic, etc. as skin layer material. Different materials have different optical attenuation performance and temperature application range. The diameter of the plastic optical fiber cable is relatively large, usually 0.5-1mm, which makes its connection simple, low installation cost, and cheap injection molding connectors can be used.

[0003] Through the retrieval, it is found that the Chinese patent publication No. CN206369837U discloses a new plastic optical fiber cable, which comprises a fiber core and a buffer layer. The fiber core is a fiber made of plastic. The inner surface of the fiber core is glued with a reflective material. The reflective material is a transparent material with a lower refractive index than the fiber core material. The inner surface of the reflective material is glued with a reinforcing device. The outer surface of the fiber core is glued with a cladding layer, which also provides mechanical protection. The outer surface of the cladding layer is glued with a buffer layer, and the outer surface of the buffer layer is provided with an outer protective sleeve. The buffer layer comprises a first buffer layer and a second buffer layer. The inner surface of the first buffer layer is glued with a cladding layer. The outer surface of the second buffer layer is provided with an outer protective sleeve. The outer protective sleeve is a polyethylene sheath. The first buffer layer is a polytetrafluoroethylene, and the second buffer layer is formed of a polyamide material. The utility model provides a new plastic optical fiber cable with strong toughness, small loss, simple structure, and great future development prospects. The plastic optical fiber cable is used to provide a reliable communication transmission channel. In a low temperature environment, the plastic optical fiber cable material may shrink or harden, causing changes in its structure, which in turn affects the transmission of optical signals. Low temperature may also increase the light scattering in the optical fiber, and excessively low temperature may cause signal attenuation, which in turn affects the user's experience when using. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a plastic optical fiber cable with bending resistance and low temperature resistance, which has the advantages of low temperature resistance and solves the problem that the plastic optical fiber cable is used to provide a reliable communication transmission channel. In a low temperature environment, the plastic optical fiber cable material may shrink or harden, causing changes in its structure, which in turn affects the transmission of optical signals. Low temperature may also increase the light scattering in the optical fiber, and excessively low temperature may cause signal attenuation, which in turn affects the user's experience when using.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of bending-resistant and low-temperature-resistant plastic optical fiber cable, including tensile wire core, the outer surface of the tensile wire core is fixed with multiple optical fiber cores, the optical fiber core, the outer side of the optical fiber core is equipped with the protection mechanism for improving its protection ability;

[0006] The protection mechanism includes an inner protective layer on the outer side of the optical fiber core, a buffer layer on the outer side of the inner protective layer, a waterproof layer on the outer side of the buffer layer, a low-temperature-resistant layer on the outer side of the waterproof layer, a tensile layer on the outer side of the low-temperature-resistant layer, a corrosion-resistant layer on the outer side of the tensile layer, and a wear-resistant layer on the outer side of the corrosion-resistant layer.

[0007] Further, the number of optical fiber cores is six, and the six optical fiber cores are evenly distributed on the outer surface of the tensile wire core.

[0008] Further, the inner protective layer is a polyurethane layer, and the buffer layer is a rubber layer.

[0009] Further, the waterproof layer is a water-resistant non-woven fabric layer, and the low-temperature-resistant layer is a polypropylene layer.

[0010] Further, the tensile layer is an aramid layer, and the corrosion-resistant layer is a low-smoke and halogen-free polyolefin layer.

[0011] Further, the wear-resistant layer is a thermoplastic polyurethane layer.

[0012] Further, the outer surface of the wear-resistant layer is coated with a fire-retardant coating.

[0013] Compared with the prior art, the technical scheme of the present application has the following advantages:

[0014] The bending-resistant and low-temperature-resistant plastic optical fiber cable has a protection mechanism on the outer surface of the tensile wire core and the optical fiber core, which can provide buffering protection, waterproofing, low-temperature resistance, tensile resistance, corrosion resistance, and wear resistance to the plastic optical fiber cable, and protect the service life of the plastic optical fiber cable, avoiding signal attenuation at low temperatures that affects the user's experience during use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the utility model;

[0016] Figure 2 is a structural schematic diagram of the protection mechanism of the utility model;

[0017] Figure 3 is a structural schematic diagram of the tensile wire core, the optical fiber core, and the wear-resistant layer of the utility model.

[0018] In the figure: 1 tensile-resistant core, 2 optical fiber core, 3 protection mechanism, 301 inner protective layer, 302 buffer layer, 303 waterproof layer, 304 low-temperature-resistant layer, 305 tensile-resistant layer, 306 corrosion-resistant layer, 307 wear-resistant layer. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] Please refer to Figure 1 The plastic optical fiber cable of the embodiment is resistant to bending and low temperature, and comprises a tensile-resistant core 1. A plurality of optical fiber cores 2 are fixed to the outer surface of the tensile-resistant core 1. The outer side of the optical fiber core 2 is provided with a protection mechanism 3 for improving the protection capability.

[0021] In the embodiment, the number of the optical fiber cores 2 is six, and the six optical fiber cores 2 are uniformly distributed on the outer surface of the tensile-resistant core 1.

[0022] Please refer to Figures 2 to 3 In order to improve the protection capability of the plastic optical fiber cable at low temperature, the protection mechanism 3 in the embodiment comprises an inner protective layer 301 arranged on the outer side of the optical fiber core 2. The inner protective layer 301 is made of a polyurethane layer. Polyurethane is a material with excellent physical properties and is often used as an optical fiber protective sleeve material to provide additional protection. The outer side of the inner protective layer 301 is provided with a buffer layer 302. The outer side of the buffer layer 302 is provided with a waterproof layer 303. The waterproof layer 303 is made of a water-resistant non-woven fabric layer. The water-resistant non-woven fabric usually adopts hydrophobic synthetic fibers. The molecular structure of these fibers contains hydrophobic groups, making it difficult for water to penetrate. In addition, the water-resistant non-woven fabric will be treated with water-repellent agent during the production process, such as coating the surface of the fibers with water-repellent agent to form a hydrophobic film, further enhancing its waterproof performance. The formation of multiple layers of protection ensures the stability and durability of the optical fiber in various environments.

[0023] The outer side of the waterproof layer 303 is provided with a low-temperature-resistant layer 304, and polypropylene is selected as the low-temperature-resistant layer 304. Polypropylene is a material with good low-temperature resistance and is suitable for making the outer sheath of the optical cable. It can work in a temperature range of-55℃ to +70℃. Cold-resistant polypropylene can be used as a cable insulation layer material and has good electrical properties and cold resistance. It is suitable for power transmission in low-temperature environments. The outer side of the low-temperature-resistant layer 304 is provided with a tensile layer 305, and aramid is selected as the tensile layer 305. Aramid has high strength and low density, so it can effectively absorb the force applied to the optical cable from the outside, so that the optical cable can withstand greater tension and reduce the risk of damage during installation and use. Aramid has a low expansion coefficient and high dimensional stability, which can reduce the deformation of the optical cable when the temperature changes, thereby maintaining the precise alignment of the optical fiber and improving the transmission efficiency of the optical signal.

[0024] The outer side of the tensile layer 305 is provided with an anti-corrosion layer 306, and low-smoke halogen-free polyolefin is selected as the anti-corrosion layer 306. The surface of the optical fiber low-smoke halogen-free material has a layer of special compound, which can effectively protect the material surface from corrosion and thereby improve the service life of the material. The outer side of the anti-corrosion layer 306 is provided with a wear-resistant layer 307, and thermoplastic polyurethane is selected as the wear-resistant layer 307. The thermoplastic polyurethane layer has excellent wear resistance on the surface of the optical cable. The wear resistance of TPU material is 2-10 times that of natural rubber, which enables it to withstand high-strength friction and wear on the surface of the optical cable, making it particularly suitable for use in harsh environments.

[0025] In the embodiment, the inner protective layer 301 is a polyurethane layer, and the buffer layer 302 is a rubber layer. Rubber material can reduce the transmission loss of the optical cable and ensure the transmission strength of the optical fiber. In addition, rubber can also make the optical cable have a certain flexibility, which is convenient for bending and placing the optical cable, ensures that the optical cable can work stably in complex environments, reduces damage and transmission interruption caused by external factors, the waterproof layer 303 is a water-blocking non-woven fabric layer, the low-temperature-resistant layer 304 is a polypropylene layer, the tensile layer 305 is an aramid layer, the anti-corrosion layer 306 is a low-smoke halogen-free polyolefin layer, and the wear-resistant layer 307 is a thermoplastic polyurethane layer. The outer surface of the wear-resistant layer 307 is coated with a fire-retardant coating. Coating the fire-retardant coating on the outer surface of the wear-resistant layer 307 can avoid the generation of fire and electric sparks, protecting the safety of personnel and property.

[0026] It should be noted that the plastic optical fiber cable has the functions of buffering protection, waterproofing, low-temperature resistance, tensile resistance, corrosion resistance, and wear resistance, which protects the service life of the plastic optical fiber cable and avoids signal attenuation in low-temperature environments, which affects the user's experience during use.

[0027] The working principle of the above embodiment is as follows:

[0028] (1) The inner protective layer 301 is arranged outside the plurality of optical fiber cores 2. Polyurethane is selected as the inner protective layer 301. Polyurethane is a material with excellent physical properties and is often used as an optical fiber protective sleeve material to provide additional protection. Rubber is selected as the buffer layer 302. Rubber materials can reduce the transmission loss of optical cables and ensure the transmission strength of optical fibers. In addition, rubber can make the optical cable have a certain flexibility, which is convenient for bending and placing the optical cable, ensures that the optical cable can work stably in complex environments, reduces damage and transmission interruption caused by external factors, and selects water-resistant non-woven fabric as the waterproof layer 303. Water-resistant non-woven fabric usually uses hydrophobic synthetic fibers. These fibers have a molecular structure containing hydrophobic groups, making it difficult for water to penetrate. In addition, water-resistant non-woven fabric will be treated with water-repellent agents during the production process, such as coating the surface of the fibers with water-repellent agents to form a hydrophobic film, further enhancing its waterproof performance. Forming a multi-layer protection ensures the stability and durability of the optical fiber in various environments. Polypropylene is selected as the low-temperature-resistant layer 304. Polypropylene is a material with good low-temperature resistance and is suitable for making the outer sheath of the optical cable, which can work in a temperature range of -55°C to +70°C. Cold-resistant polypropylene can be used as a cable insulation layer material with good electrical properties and cold resistance, suitable for power transmission in low-temperature environments.

[0029] (2) Aramid is selected as the tensile layer 305. Aramid has high strength and low density, which can effectively absorb the external force applied to the optical cable, so that the optical cable can withstand greater tension and reduce the risk of damage during installation and use. Aramid has low expansion coefficient and high dimensional stability, which can reduce the deformation of the optical cable when the temperature changes, thereby maintaining the precise alignment of the optical fiber and improving the transmission efficiency of the optical signal. Low-smoke halogen-free polyolefin is selected as the corrosion-resistant layer 306. The surface of the optical fiber low-smoke halogen-free material has a layer of special compound, which can effectively protect the material surface from corrosion, thereby improving the service life of the material. Thermoplastic polyurethane is selected as the wear-resistant layer 307. The thermoplastic polyurethane layer has excellent wear resistance on the surface of the optical cable. The wear resistance of TPU material is 2-10 times that of natural rubber, which makes it able to withstand high-strength friction and wear on the surface of the optical cable, especially suitable for use in harsh environments. The outer surface of the wear-resistant layer 307 is coated with a flame-retardant coating to avoid fire and electric spark.

[0030] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. The scope of the present application shall be limited only by the claims.

[0031] While the embodiments of the present application have been shown and described with respect to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. Therefore, the scope of the application should not be limited by the embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims

1. A bend and low temperature resistant plastic optical fiber cable comprising a tensile resistant core (1), characterized in that: The outer surface of the anti-tensile core (1) is fixed with a plurality of optical fiber cores (2), and the outer side of the optical fiber core (2) is provided with a protection mechanism (3) for improving the protection ability. The protection mechanism (3) comprises an inner protection layer (301) arranged on the outer side of the optical fiber core (2), the outer side of the inner protection layer (301) is provided with a buffer layer (302), the outer side of the buffer layer (302) is provided with a waterproof layer (303), the outer side of the waterproof layer (303) is provided with a low-temperature resistant layer (304), the outer side of the low-temperature resistant layer (304) is provided with an anti-tensile layer (305), the outer side of the anti-tensile layer (305) is provided with an anti-corrosion layer (306), and the outer side of the anti-corrosion layer (306) is provided with a wear-resistant layer (307).

2. The bend-insensitive, low temperature resistant plastic optical fiber cable of claim 1, wherein: The number of the optical fiber core (2) is six, and the six optical fiber cores (2) are uniformly distributed on the outer surface of the anti-tensile core (1).

3. The bend-insensitive, low temperature resistant plastic optical fiber cable of claim 1, wherein: The inner protection layer (301) is a polyurethane layer, and the buffer layer (302) is a rubber layer.

4. The bend-insensitive, low temperature resistant plastic optical fiber cable of claim 1, wherein: The waterproof layer (303) is a water-blocking non-woven fabric layer, and the low-temperature resistant layer (304) is a polypropylene layer.

5. The bend-insensitive, low temperature resistant plastic optical fiber cable of claim 1, wherein: The anti-tensile layer (305) is an aramid layer, and the anti-corrosion layer (306) is a low-smoke halogen-free polyolefin layer.

6. The bend-insensitive, low temperature resistant plastic optical fiber cable of claim 1, wherein: The wear-resistant layer (307) is a thermoplastic polyurethane layer.

7. The bend-insensitive, low temperature resistant plastic optical fiber cable of claim 1, wherein: The outer surface of the wear-resistant layer (307) is coated with a flame-retardant coating.

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