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A high-strength leather cable

A leather cable, high-strength technology, applied in the field of communication optical fiber and cable, can solve the problems of resin abrasion resistance, poor puncture resistance, optical fiber signal transmission ability decline, impact energy can not be absorbed, etc., to achieve good flexibility and avoid transmission to the optical fiber unit , to avoid the effects of attenuation and damage

Active Publication Date: 2022-05-20
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing leather cable sheath has a single-layer structure, generally adopts flame-retardant PVC, flame-retardant LSZH, and its resin has poor abrasion resistance and puncture resistance. In the process of cable and dragging, the sheath is easily damaged or even peeled off, causing the optical fiber unit in the optical cable to be subjected to stress such as extrusion, twisting, bending, etc., resulting in a decrease in the optical fiber signal transmission capability, and even damage and breakage of the optical fiber
At the same time, since the strength member in the optical cable is made of GRP, FRP, steel wire, etc. with high modulus, the optical cable is relatively "hard". When the optical cable is impacted by external mechanical stress, the impact energy cannot be effectively absorbed by the sheath cortex, thus conducting to the optical fiber unit, causing damage to the optical fiber inside the cable

Method used

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  • A high-strength leather cable
  • A high-strength leather cable
  • A high-strength leather cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The structure of embodiment 1 is as figure 1 , 2 As shown, it includes a sheath with a rectangular cross-section. The sheath includes an inner sheath 3 and an outer sheath 4. The outer sheath is made of polyoxymethylene flame-retardant resin with a surface hardness of 2H and a flexural modulus of 2500Mpa, the inner sheath adopts elastomeric resin, which is ethylene-propylene copolymer, and its flexural modulus is 400Mpa. The thickness 2t of the outer sheath is 15% of the total thickness of the sheath, and the cross-sectional area of ​​the inner sheath is about 65% of the cross-sectional area of ​​the cable. The middle part of the sheath is covered with an optical fiber unit 1, the optical fiber unit is a single-core optical fiber, the number of cores can be 1 to 2 cores, and a strengthening member 2 is installed corresponding to the optical fiber unit on both sides of the sheath, and each side is provided 1 strand, the reinforcing member is composed of reinforcing fib...

Embodiment 2

[0022] The structure of embodiment 2 is as image 3 As shown, the difference from the previous embodiment is that: the optical fiber unit is a single-core optical fiber, the number of cores can be 2 cores, and strength members 2 are installed corresponding to the optical fiber units on both sides of the sheath, and each side is provided with 2 strands, the reinforcement is PBO fiber with a modulus of 180Gpa; the elastomer flame-retardant resin is SBS, and the components and contents are by weight: SBS copolymer 72%, phosphorus nitrogen compound 25%, organic nano-soil 1 %, antioxidant 1%, anti-UV carbon black 1%, flexural modulus is 500Mpa; wear-resistant resin is polymethacrylate flame retardant resin, surface hardness is 3H, flexural modulus is 2600Mpa, the components and content are according to By weight: polymethyl methacrylate 60%, MTH 35%, organic nano-soil 2%, antioxidant 2%, anti-UV carbon black 1%. The thickness 2t of the outer sheath is 25% of the total thickness of...

Embodiment 3

[0024] The structure of embodiment 3 is the same as that of embodiment 2, wherein, the modulus of the ultra-high molecular weight polyethylene fiber of the reinforcing member is 95Gpa; The composition and content by weight are: 70% of ethylene-propylene copolymer, 20% of organic phosphate, 5% of phosphorus nitrogen compound, 2% of organic nano-soil, 2% of antioxidant, and 1% of anti-UV carbon black. The wear-resistant resin of the outer sheath is polymethacrylate flame retardant resin, with a surface hardness of 2H and a flexural modulus of 2800Mpa. The components and contents are by weight: polymethacrylate 65%, MTH 30%, organic 2% of nano soil, 2% of antioxidant, 1% of anti-UV carbon black, the thickness of the outer sheath is 15% of the total thickness of the sheath, and the cross-sectional area of ​​the inner sheath is about 65% of the cross-sectional area of ​​the optical cable.

[0025]The production process of this embodiment is as follows: the 2-core optical fiber unit...

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Abstract

The invention relates to a high-strength leather optical cable, which includes a sheath with a rectangular cross-section, an optical fiber unit is coated in the middle of the sheath, and strength members are installed on both sides of the sheath corresponding to the optical fiber unit. The middle part corresponds to the optical fiber unit to set a groove shrinking from the outside to the inside. It is characterized in that the sheath includes an inner sheath and an outer sheath. The outer sheath is made of wear-resistant resin, and its surface hardness is 1H~4H. Flexural modulus ≥ 2000Mpa, the inner sheath is made of elastomer resin with a flexural modulus of 200-800Mpa, and the thickness of the outer sheath is 10%-40% of the total thickness of the sheath. The sheath of the present invention is soft on the inside and rigid on the outside, which can improve the friction resistance of the sheath layer of the optical cable, the resistance to foreign objects or the puncture resistance of sharp objects, and effectively improve the protection of the sheath to the optical fiber unit during the installation and laying of the optical cable; and The strength of the sheath is high, and it can avoid sheath sheath shedding and optical fiber damage during the installation and laying of the optical cable, and avoid the occurrence of "broken fiber".

Description

technical field [0001] The invention relates to a high-strength leather wire optical cable, which belongs to the technical field of communication optical fiber and optical cable. Background technique [0002] With the rapid development of Internet technology, optical fiber access has become a hot spot in the field of optical communication. [0003] FTTH (fiber-to-the-home) is an effective model for the development of optical fiber access networks. It not only meets the technical development requirements in the field of optical communications, but also meets the end users' requirements for high-speed and large-capacity transmission of optical network signals. In the FTTH access project, flexible and high-strength leather cable has been widely used in the access network. At present, the general access network often adopts a butterfly-shaped drop-in optical cable, that is, a leather cable. Ordinary leather cable has a standard 8-shaped (butterfly) structure. There are two par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/44
CPCG02B6/443G02B6/4433G02B6/4436
Inventor 罗俊超杨向荣祁林刘宏超黄杰
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD