CN201294118Y - Foaming crosslinking polyolefin insulated cable - Google Patents

Abstract

The utility model discloses a foaming crosslinking polyolefin insulated cable, which comprises a conductive core, wherein a foaming crosslinking polyolefin layer is evenly coated on the periphery of the conductive core, thereby integrating the conductive core with the foaming cross-linking polyolefin layer. The insulated cable has the advantages of light structural weight, high mechanical strength, excellent impact resistance, fine environmental stress cracking resistance and the like.

Description

Foaming cross-linked polyolefin insulated cable

Technical field:

The utility model relates to a kind of foaming cross-linked polyolefin insulated cable, is mainly used in communication, field of signal transmissions, and some has the electric power transfer field of specific (special) requirements.

Background technology:

At present, adopt the outer layer insulation medium of polyethylene foamed both at home and abroad usually, have advantages such as abscess is evenly fine and closely woven, foam degrees is controlled easily, effective dielectric constant is low, material light specific gravity as cable core.Generally be used for telecommunication cable, signal cable or radio frequency cable, make cable have lower electric capacity and decay, can satisfy the requirement of high-quality, long Distance Transmission.But also have low, the shortcomings such as shock resistance is poor, environmental stress crack resistance difference of mechanical strength of insulation simultaneously, the highest requirement that also can only satisfy 70 ℃ of long-term work temperature can not adapt to the demanding occasion of some working temperature.This is because the common polythene resin belongs to the crystal polymer thing, is linear structure, and intermolecular force is very little, is difficult for keeping the rock-steady structure of molecule, thereby can produces defectives such as mechanical strength is low, temperature resistant grade is low.

The utility model content:

The purpose of this utility model provides that a kind of lightweight construction, mechanical strength height, shock resistance are good, environmental stress crack resistance and electric insulation and the good foaming cross-linked polyolefin insulated cable of transmission performance.

To achieve these goals, the utility model comprises: conductor wire core, around conductor wire core, be uniformly coated with foaming cross-linked polyolefin insulating barrier, and make conductor wire core and foaming cross-linked polyolefin insulating barrier form one.

Because cross-linked polyolefin is by the method for chemistry or radiation polyethylene to be carried out modification, make between its strand to be cross-linked with each other, become network structure by linear structure, thereby improve the stability of its molecular structure greatly.Can overcome the shortcoming of common polyethylene foamed, have other good performance of General Physics polyethylene foamed simultaneously.Adopt the cable of this insulation system to have advantages such as transmission attenuation is low, lightweight construction, mechanical strength height, shock resistance is good, environmental stress crack resistance is good, its long-term work temperature can reach more than 80 ℃.

Description of drawings:

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is a cross-sectional structure schematic diagram of the present utility model.

Embodiment:

As shown in Figure 1, the utility model comprises: conductor wire core 1, around conductor wire core, be uniformly coated with foaming cross-linked polyolefin insulating barrier 2, and make conductor wire core and foaming cross-linked polyolefin insulating barrier form one.This foaming cross-linked polyolefin insulating barrier can be the individual layer foaming structure, it also can be skin-bubble double-layer structure or skin-bubble-Pi three-decker, the foaming mode can be that physical blowing also can adopt chemical blowing, according to actual operation parameter needs, can add other organic or inorganic chemical composition in the foaming cross-linked polyolefin.Conductor wire core can be metal materials such as copper with excellent conductive performance, aluminium, copper cover aluminum, also can be the other materials with excellent conductive performance.During practical application, can adopt the utility model to form cable, also can adopt the cable core with other insulation system to be combined into cable with combining structures such as single, pair twist, star quad strandings.

Claims (1)

1, a kind of foaming cross-linked polyolefin insulated cable comprises: conductor wire core (1), it is characterized in that around conductor wire core, being uniformly coated with foaming cross-linked polyolefin insulating barrier (2), and make conductor wire core and foaming cross-linked polyolefin insulating barrier form one.

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