CN115639651B

CN115639651B - Optical fiber ribbon optical cable with circular section

Info

Publication number: CN115639651B
Application number: CN202211041684.0A
Authority: CN
Inventors: 卢星星; 倪先元; 兰小波; 田巧丽; 曹蓓蓓; 王玉; 王颖; 余琴芳
Original assignee: Yangtze Optical Fibre and Cable Co Ltd
Current assignee: Yangtze Optical Fibre and Cable Co Ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2023-08-22
Anticipated expiration: 2041-12-07
Also published as: CN114167560B; CN114167560A; CN115657230B; CN115657230A; CN115639651A

Abstract

The invention relates to an optical fiber ribbon cable with a circular section, which comprises a cable core and a sheath, wherein the cable core comprises an overlapped optical fiber ribbon, and is characterized in that a self-cleaning layer is coated outside the sheath; the self-cleaning layer comprises a sheath resin material and mixed titanium dioxide particles with the diameter of 5-50 nm, wherein the mixing ratio of the titanium dioxide particles is 0.1-0.8% by weight, and the self-cleaning layer is formed by extrusion molding of the sheath resin material mixed with the titanium dioxide particles; silica particles with the diameter of 30-50 nm are mixed in the self-cleaning layer, and the weight ratio of the silica particles to the titanium dioxide particles is 3:1-4:1. The self-cleaning layer comprises the titanium dioxide photocatalyst material, and can remove pollutants adhered to the optical cable by utilizing the action of rainwater and sunlight, thereby being beneficial to the use and maintenance of the optical cable. The self-cleaning layer is added with nano silicon dioxide particles, so that the aggregation effect of titanium dioxide particles can be better avoided, the self-cleaning effect and the service life of the photocatalyst are further enhanced, and the cost can be reduced.

Description

Optical fiber ribbon optical cable with circular section

Technical Field

The invention relates to an optical fiber ribbon cable with a circular cross section, and belongs to the technical field of photoelectric communication transmission. The invention is as follows: 202111485842.7, filing date: 2021, 12, 07, name: a butterfly optical cable is disclosed.

Background

With the progress of technology, communication technology has rapidly progressed. In recent years, "three-in-one" construction is advancing, and "three-in-one" refers to an information communication network in which a telecommunication network, a broadcast television network, and the internet are mutually permeable, compatible, and gradually integrated into a unified one. FTTx (Fiber To The x) is the best mode of full-service and high-bandwidth access requirements nowadays, and it is generally considered that the FTTx access scheme can achieve three-in-one in a true sense, so that the development of FTTx is greatly promoted by the construction of three-in-one. The FTTx construction is developed at a high speed, and facilities, equipment, devices, cables and the like which are matched with the FTTx construction are generated. The use of butterfly drop cables (commonly known as flex cables) and high capacity transmission cables as FTTx access networks and base stations is also constantly increasing.

The butterfly-shaped lead-in optical cable is mainly used for signal transmission between indoor and building, the structure is simpler, the cross section of the butterfly-shaped lead-in optical cable is butterfly-shaped or 8-shaped, the optical fiber is located in the geometric center of the butterfly-shaped optical cable, two reinforcing cores are symmetrically arranged on the upper side and the lower side of the optical fiber, a V-shaped groove is formed in the middle of two side surfaces of the optical cable, the butterfly-shaped optical cable is subjected to wind blowing and rain blowing outdoors, pollutants are easily deposited on the outer surface of the optical cable, particularly at the V-shaped groove, the cable sheath can be corroded, the service life of the optical cable is influenced, and on the other hand, the hiding and spawning of insects and the insect-free optical cable are also easy, so that the optical cable is damaged. The high-capacity transmission optical cable is used for information transmission between base stations, is a sheath with a circular cross section, and has the problem that the outer surface of the sheath is easy to pollute when hung outdoors.

Disclosure of Invention

The invention aims to solve the technical problem of providing the optical fiber ribbon cable with the circular cross section aiming at the defects in the prior art, has a self-cleaning function, can reduce the pollution of an outer sheath of the optical cable, and is beneficial to the use and maintenance of the optical cable.

The invention adopts the technical proposal for solving the problems that: the cable comprises a cable core and a sheath, wherein the cable core comprises an overlapped optical fiber ribbon, and is characterized in that a self-cleaning layer is coated outside the sheath; the self-cleaning layer comprises a sheath resin material and mixed titanium dioxide particles with the diameter of 5-50 nm, wherein the mixing ratio of the titanium dioxide particles is 0.1-0.8% by weight, and the self-cleaning layer is formed by extrusion molding of the sheath resin material mixed with the titanium dioxide particles; silica particles with the diameter of 30-50 nm are mixed in the self-cleaning layer, and the weight ratio of the silica particles to the titanium dioxide particles is 3:1-4:1.

According to the scheme, the diameter particle of the titanium dioxide particle is 10-30 nm, and the mixing ratio of the titanium dioxide particle is 0.4-0.6% by weight.

According to the scheme, the self-cleaning layer is also mixed with silicon dioxide particles with the diameter of 35-45 nm, and the weight ratio of the silicon dioxide particles to the titanium dioxide particles is 3.3:1-3.7:1.

According to the scheme, the thickness of the self-cleaning layer is 0.2-1 mm.

According to the scheme, the sheath resin material is polyvinyl chloride or low-smoke halogen-free flame-retardant polyolefin.

According to the scheme, the water blocking tape is arranged in the cable core, and the cable core is externally covered with the sheath with the circular section.

According to the scheme, two reinforcing pieces are symmetrically embedded in the sheath.

The invention has the beneficial effects that: 1. through set up the self-cleaning layer at the surface of optical cable, contain titanium dioxide photocatalyst material in this self-cleaning layer, utilize the effect of rainwater and sunlight can get rid of the pollutant of adhesion on the optical cable, not only reduce the pollution of optical cable oversheath, can avoid breeding and hiding of insect and insect's free radical moreover, do benefit to the use and the maintenance of optical cable. 2. The self-cleaning layer is added with nano silicon dioxide particles, so that the aggregation effect of titanium dioxide particles can be better avoided, the self-cleaning effect and the service life of the photocatalyst are further enhanced, and the cost can be reduced.

Drawings

Fig. 1 is a cross-sectional view of a first embodiment fiber optic cable of the present invention.

Fig. 2 is a cross-sectional view of a second embodiment fiber optic cable of the present invention.

Detailed Description

The invention is further described below with reference to examples and figures.

The optical cable structure of embodiment 1 is shown in fig. 1, and is an optical fiber ribbon cable with a circular cross section, and the optical fiber ribbon cable comprises a cable core and a sheath 1, wherein the cable core comprises a superposed optical fiber ribbon 9, and the optical fibers of the optical fiber ribbon can be multimode optical fibers such as OM3, OM4, OM5 and the like, and can also be single-mode optical fibers such as g.652.c, g.652.d, g.657.a1, g.657.a2, g.657.b3, g.655, g.654.a, g.654.b, g.654.c, g.654.d, g.654.e and the like. The cable core is internally provided with a water blocking belt 10, the cable core is externally covered with a sheath with a circular section, two reinforcing pieces 2 are symmetrically embedded in the sheath, and the reinforcing pieces can be nonmetal reinforcing pieces. In order to strengthen the self-cleaning performance of the sheath, the sheath is coated with a self-cleaning layer 7, and the thickness of the self-cleaning layer 7 is 0.3mm. The self-cleaning layer comprises a sheath resin material and mixed titanium dioxide particles with the average diameter of 10nm, wherein the mixing ratio of the titanium dioxide particles is 0.4% by weight; silica particles with an average diameter of 35nm are also mixed in the self-cleaning layer, and the weight ratio of the silica particles to the titanium dioxide particles is 3.8:1. The conventional optical cable sheath with the circular cross section has the problem that the outer surface of the sheath is easy to be polluted when hung outdoors, so that the printing on the surface of the sheath is blurred and difficult to identify; in addition, in the north, the optical cable with dirty surface is easier to adhere to ice and snow, and is easy to be damaged by compression in snowy weather. The self-cleaning layer can effectively avoid and alleviate the occurrence of the above situations.

The optical cable structure of embodiment 2 is shown in fig. 2, and is a skeleton type optical cable with a circular section, which comprises a cable core and a sheath 1, wherein the cable core comprises a skeleton 13, a skeleton groove 11 is formed in the skeleton, an optical fiber ribbon and/or an optical fiber 9 are placed in the skeleton groove, the optical fiber ribbon is preferably a flexible optical fiber ribbon, such as a spider-web optical fiber ribbon, which is convenient to place, a water-blocking ribbon 12 is wound outside the skeleton, the cable core is externally covered with the sheath with a circular section, the self-cleaning performance of the sheath is enhanced, the sheath is externally covered with a self-cleaning layer 7, the self-cleaning layer comprises a sheath resin material and mixed titanium dioxide particles with an average diameter of 10nm, and the mixing ratio of the titanium dioxide particles is 0.4% by weight; silica particles with an average diameter of 35nm are also mixed in the self-cleaning layer, and the weight ratio of the silica particles to the titanium dioxide particles is 3:1. The thickness of the self-cleaning layer 7 on one side is 0.5mm.

Claims

1. The optical fiber ribbon cable with the circular section comprises a cable core and a sheath, wherein the cable core comprises an overlapped optical fiber ribbon, and is characterized in that a self-cleaning layer is coated outside the sheath; the self-cleaning layer comprises a sheath resin material and mixed titanium dioxide particles with the diameter of 5-50 nm, wherein the mixing ratio of the titanium dioxide particles is 0.1-0.8% by weight, and the self-cleaning layer is formed by extrusion molding of the sheath resin material mixed with the titanium dioxide particles; silica particles with the diameter of 30-50 nm are mixed in the self-cleaning layer, and the weight ratio of the silica particles to the titanium dioxide particles is 3:1-4:1.

2. The optical fiber ribbon cable of claim 1 wherein the diameter of the titanium dioxide particles is 10-30 nm and the mixing ratio of the titanium dioxide particles is 0.4-0.6% by weight.

3. The ribbon cable of claim 1 or 2 wherein the silica particles have a particle size of 35 to 45nm and the weight ratio of silica particles to titania particles is 3.3:1 to 3.7:1.

4. The ribbon cable of claim 1 or 2 wherein the self-cleaning layer has a thickness of 0.2 to 1mm.

5. The round section fiber optic ribbon cable of claim 1 or 2 wherein the jacket resin material is polyvinyl chloride or a low smoke zero halogen flame retardant polyolefin.

6. A circular section fiber optic ribbon cable as claimed in claim 1 or 2, wherein a water blocking tape is disposed in the cable core, the cable core being externally covered with a sheath of circular section.

7.A round section ribbon cable according to claim 1 or 2 wherein the jacket has two strength members symmetrically embedded therein.