CN201392416Y

CN201392416Y - Indoor ribbon optical fiber cable

Info

Publication number: CN201392416Y
Application number: CN200920142009U
Authority: CN
Inventors: 沈小平; 张海军; 刘意
Original assignee: Jiangsu Tongding Optic Electronic Stock Co Ltd
Current assignee: Tongding Interconnection Information Co Ltd
Priority date: 2009-03-09
Filing date: 2009-03-09
Publication date: 2010-01-27
Anticipated expiration: 2019-03-09

Abstract

The utility model relates to an indoor ribbon optical fiber cable, which comprises an optical fiber ribbon formed by coloring optical fiber with an even number of cores arranged in parallel and with shaft axes positioned on the same plane, non-metallic ribbons arranged on the upper and the lower sides of the optical fiber ribbon, and a flat sheath covering the peripheries of the non-metallic ribbons and the optical fiber ribbon. The non-metallic ribbons are adopted as reinforcers for the optical fiber cable and the cost of the non-metallic ribbons is low, so that the whole cost of the utility model is greatly reduced; the ductility of the non-metallic ribbons is good, thereby enhancing the pressure resistance of the manufactured optical fiber cable; the whole structure is full-dielectric, thereby effectively preventing the lightning strike and the thunder and lightning leading-in. Therefore, the utility model is very suitable for the wiring of residential areas, office buildings and campus networks.

Description

A kind of indoor ribbon optical cable

Technical field

The utility model relates to a kind of communications optical cable, especially a kind ofly is applied to indoor optical fiber ribbon cable.

Background technology

Traditional indoor ribbon optical cable passes through painted with a plurality of simple optical fibers, the oversheath composition that piles up the fibre ribbon that forms and envelope described fibre ribbon, usually in order to guarantee the intensity of optical cable, upper and lower sides at fibre ribbon is provided with reinforcement, reinforcement adopts aramid yarn to make more in the prior art, because at present domestic still do not have producer and can produce aramid yarn, aramid yarn all need be from external import, and its price is higher, thereby restricted the development of this kind inside cable, and because the fragility of aramid yarn itself, its anti-pressure ability is relatively poor, and bending property is not enough, thereby has also influenced the transmission quality of optical cable.

The utility model content

The utility model purpose just provides that a kind of cost is lower, the indoor ribbon optical cable of better performances.

In order to reach above-mentioned utility model purpose, the technical solution of the utility model is: a kind of indoor ribbon optical cable, it comprises fibre ribbon, the nonmetal band that is arranged on described fibre ribbon upper and lower sides that the even number core is set up in parallel mutually and axial line is in the same plane colored optical fiber forms, the flat-shaped sheath that is coated on described nonmetal band and fibre ribbon periphery.

Further, described nonmetal band comprise the glass fibre belt that is pressed into by glass fibre, near described fibre ribbon one side and be coated in water blocking layer on the described glass fibre belt.

Described water blocking layer material is mainly mixed by polyacrylate and polyvinyl alcohol copolymer and crosslinking chemical.

Described even number core fibre is provided with bondingly.

Described sheath is the low smoke and zero halogen sheath.

Because the utilization of technique scheme the utlity model has following advantage: owing to adopt the reinforcement of nonmetal band, nonmetally be with cheaply, will reduce overall cost of the present utility model greatly as optical cable; And because the toughness of nonmetal band itself is better, thereby make the optical cable anti-pressure ability of making be improved; Because total is full medium, can effectively prevent the introducing of thunderbolt and thunder and lightning, be fit to very much the wiring of residential quarters, office building and campus network.

Description of drawings

Accompanying drawing 1 is the schematic perspective view of the utility model indoor ribbon optical cable;

Accompanying drawing 2 is the utility model inside cable transverse sectional view;

Wherein: 1, fibre ribbon; 11, optical fiber; 2, nonmetal band; 21. glass fibre belt; 22, water blocking layer; 3, sheath;

Embodiment

Below in conjunction with accompanying drawing the utility model preferred embodiment is elaborated:

Optical fiber ribbon cable as depicted in figs. 1 and 2, whole optical cable is flat bar, its mainly by fibre ribbon 1, nonmetal be with 2 and oversheath 3 form.Particularly, fibre ribbon 1 is positioned at the center of optical cable, it is formed by the colored optical fiber 11 that multicore is set up in parallel, usually the core number of optical fiber 11 is an even number, as 4 cores, 6 cores, 8 cores or 24 cores etc., two adjacent core fibres 11 are together bonding by resin, and the axial line of multi-core fiber 11 parallels and be in the same plane; Nonmetal with 2 both sides up and down that are arranged on described fibre ribbon 1, it is cuboid, nonmetally form by the glass fibre belt 21 that glass fibre is pressed into 2 main bodys, on the surface of being close to described fibre ribbon 1 one sides on the glass fibre belt 21, be coated with water blocking layer 22, the water-absorbing resin that this water blocking layer 22 mainly is made up of polyacrylate and polyvinyl alcohol copolymer and crosslinking chemical etc. forms, particularly, this water blocking layer can be by 100 parts of the aqueous solution that is neutral acrylates or methacrylate copolymer 35%, 10～50 parts of polyvinyl alcohol (PVA) 5% aqueous solution, 0.5～1.0 part of even mixed configuration of crosslinking chemical forms.Owing to this water blocking layer 22 is set, can guarantees optical cable unit radial block-water performance.Sheath 3 be coated on described fibre ribbon 1 with nonmetal with 2 periphery, sheath 3 adopts fire-retardant Halogen material tygon to make, and can guarantee that like this optical cable has good environmental stress cracking resistance and fire resistance, simultaneously relatively environmental protection.

The utility model optical cable adopts nonmetal with 2 reinforcements as optical cable, and the technical parameter of nonmetal band can satisfy the requirement of inside cable mechanical property and environmental performance fully, and following table is the technical parameter of nonmetal band:

Technical indicator	Parameter
Technical indicator	Parameter	Tensile strength (Mpa)	≥1100
Tensile modulus of elasticity (Gpa)	≥50	Tensile strength (Mpa)	≥1100
Tensile modulus of elasticity (Gpa)	≥50	Breaking elongation (%)	≤4.0
Expansion coefficient of heat linear (1/ ℃)	≤6.7×10-6	Breaking elongation (%)	≤4.0

Therefore, adopt the optical cable of nonmetal band as reinforcement and since nonmetal be with cheap, so can reduce the overall cost of the utility model optical cable greatly; And the utility model optical cable adopts the dry type waterproofing design, there is not factice for filling in the optical cable, be convenient to construction and practical, it is full dielectric structure, thereby can effectively prevent thunderbolt and thunder and lightning introducing, and the utility model optical cable can satisfy inside cable mechanical property and environmental performance requirement, satisfy fire-retardant requirement again, be fit to very much the wiring of residential quarters, office building and campus network, with low cost, the easy construction of this optical cable is highly suitable for the FTTX scheme of telecom operators.

The utility model manufacturing process is also comparatively simple, after at first being ready to nonmetal band and fibre ribbon, nonmetal band and fibre ribbon are adopted initiatively unwrapping wire, folded band is neatly sent into head, extruding machine adopts plsitive mold, thereby make sheath closely be wrapped in nonmetal band and fibre ribbon outside, reduce the sheath post shrinkage.

Above-mentionedly in conjunction with the embodiments the technical solution of the utility model and beneficial effect thereof are illustrated; institute is understood that; the above only is a specific embodiment of the utility model; can not limit the utility model, the conversion of all equivalences of having done according to essence of the present utility model all should be included within the protection domain of the present utility model.

Claims

1, a kind of indoor ribbon optical cable is characterized in that: it comprises fibre ribbon (1), the nonmetal band (2) that is arranged on described fibre ribbon (1) upper and lower sides that the colored optical fiber that the even number core is set up in parallel mutually and axial line is in the same plane (11) forms, be coated on the flat-shaped sheath (3) of described nonmetal band (2) and fibre ribbon (1) periphery.

2, indoor ribbon optical cable according to claim 1 is characterized in that: described nonmetal band (2) comprises the glass fibre belt (21) that is pressed into by glass fibre, near described fibre ribbon (1) one side and be coated in water blocking layer (22) on the described glass fibre belt (21).

3, indoor ribbon optical cable according to claim 2 is characterized in that: described water blocking layer (22) material is mainly mixed by polyacrylate and polyvinyl alcohol copolymer and crosslinking chemical.

4, indoor ribbon optical cable according to claim 1 is characterized in that: described even number core fibre (11) is provided with bondingly.

5, indoor ribbon optical cable according to claim 1 is characterized in that: described sheath (3) is the low smoke and zero halogen sheath.