CN212010402U

CN212010402U - Halogen-free low-smoke high-performance wire

Info

Publication number: CN212010402U
Application number: CN202020464895.5U
Authority: CN
Inventors: 李永辉; 李章学; 邝志金
Original assignee: Sichuan Chndo Cable Co ltd
Current assignee: Sichuan Chndo Cable Co ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2020-11-24
Anticipated expiration: 2030-04-02

Abstract

The application relates to the technical field of wire and cable manufacturing, in particular to a halogen-free low-smoke high-performance wire; the halogen-free low-smoke high-performance wire is characterized in that an inner insulating layer of high-density irradiation crosslinked polyethylene and an outer insulating layer of irradiation crosslinked ceramic polyolefin material are coated outside a conductor, so that good electrical insulating performance and excellent flame-retardant and fireproof performance are provided for the wire; in addition, these two kinds of materials all possess low smoke and zero halogen's characteristic, can not emit noxious material such as dense smoke, chlorine when burning, are favorable to personnel to flee for one's life to these two kinds of materials still possess high temperature resistant and durable characteristics, can make no halogen low smoke high performance electric wire life under rated temperature reaches 80 years, and this highly matches with the age limit of house property right, has solved current building electric wire because insulating sheath material life is short with house property right or service life line mismatch the very big inconvenience of the ageing electric wire of change that leads to and the potential safety hazard that probably causes.

Description

Halogen-free low-smoke high-performance wire

Technical Field

The application relates to the technical field of wire and cable manufacturing, in particular to a halogen-free low-smoke high-performance wire.

Background

The related laws and regulations in China stipulate that important buildings prohibit the use of polyvinyl chloride wires and cables, and halogen-free low-smoke cross-linked polyolefin insulated environment-friendly wires and cables are required to be adopted so as to avoid the casualties of people caused by the release of a large amount of harmful substances such as dense smoke, chlorine and the like by the combustion of the polyvinyl chloride cables in the case of fire. Since 1992, a large number of commercial houses built in China begin to change the wiring mode of wires from open wires to dark wires, and are limited by the fact that the research and development and production technology of domestic wires is not mature at that time, so that the service life of a common wire and cable is only 25 years, while the property right of a house is generally 50 years or 70 years, that is to say, the service life of the house and the service life of the wire and cable are seriously asynchronous, thereby causing great potential safety hazards and endangering the safety of lives and properties of people. With the rapid development of national economy and the continuous improvement of the living standard of people in China, the social electricity consumption is greatly increased, the consumption of various electrical equipment is increased sharply, and electrical fire accidents are increased, according to statistics, the number of the fires occurring in China is about more than ten thousand every year, and the direct property loss is hundreds of billions of yuan, wherein, the fires caused by electrical reasons such as short circuit of electric wires and cables, overload, electrical equipment faults and the like account for about 30 percent of the total number, the occurrence frequency of the electrical fires and the caused loss all account for the first of various fires, in the electrical fires, the fires caused by short circuit of electric wires and cables or aging account for about half of the fires, the existing electric wires for common buildings lack good high temperature resistance and fire resistance, or are difficult to meet various requirements such as long service life, fire resistance, safety, environmental protection and the like.

SUMMERY OF THE UTILITY MODEL

The application provides a there is not steamed low cigarette high performance electric wire, by interior conductor, inner insulating layer and outer insulating layer of including respectively to the outside, wherein, the inner insulating layer is high density irradiation crosslinked polyethylene material, the outer insulating layer is irradiation crosslinked pottery polyolefin material.

Optionally, the thickness of the inner insulating layer is smaller than that of the outer insulating layer.

Optionally, the thickness of the inner insulating layer is not more than 0.2 mm; the thickness of the outer insulating layer is not less than 0.6 mm.

Optionally, the inner insulating layer and the outer insulating layer are of a co-extruded structure.

Optionally, the inner insulating layer and the outer insulating layer are cross-linked by one-time irradiation with an electron accelerator.

Optionally, the volume resistivity of the high-density irradiation crosslinked polyethylene material is not less than 5 × 10¹⁴Ω*m。

The utility model discloses a there is not steamed low cigarette high performance electric wire adopts the inner insulation layer of high density irradiation crosslinked polyethylene and the outer insulation layer of irradiation crosslinked pottery porcelain polyolefin material to wrap outside the conductor, provides good electrical insulation performance for the electric wire through thinner high density irradiation crosslinked polyethylene, can provide very excellent fire behaviour for the electric wire through thicker irradiation crosslinked pottery porcelain polyolefin material; in addition, the two materials have the characteristics of low smoke and zero halogen, toxic substances such as dense smoke, chlorine and the like cannot be emitted during combustion, escape of personnel is facilitated, when a fire disaster occurs, the outer-layer insulating irradiation cross-linked ceramic polyolefin can form ceramic substances through flame combustion, so that the electric wire can be normally electrified for a certain time after the fire disaster occurs, and electric power supply is provided for escape and rescue. And the two materials also have the characteristics of high temperature resistance and durability, so that the service life of the halogen-free low-smoke high-performance electric wire at the rated temperature can reach 80 years, the service life is highly matched with the age limit of the house property right, and the great inconvenience and potential safety hazards caused by the fact that the aged electric wire is replaced due to the fact that the service life of the insulating sheath material is short and the house property right or the service life line is not matched are solved. The high-density irradiation crosslinked polyethylene material and the irradiation crosslinked ceramic polyolefin material can be purchased from the market.

Drawings

Fig. 1 is a schematic structural diagram of a cross section of the halogen-free low-smoke high-performance wire.

The reference numbers in the figures illustrate:

1-conductor, 2-inner insulating layer, 3-outer insulating layer.

Detailed Description

The present invention will be described with reference to the accompanying drawings and embodiments.

The utility model provides a there is not steamed low cigarette high performance electric wire, there is not steamed low cigarette high performance electric wire adopts no steamed flame retardant material as wire conductor's sheath insulating material, can not release poisonous and harmful substance such as a large amount of dense cigarettes and chlorine when the burning, consequently when the conflagration takes place, can fall to minimumly because of the harm that the electric wire burning produced to promote the probability that personnel fled, satisfy the relevant requirement of national law and regulation, because its green's characteristic, be particularly useful for using as the construction electric wire, of course it also is applicable to other similar use scenes equally.

As shown in fig. 1, the halogen-free low-smoke high-performance electric wire of the present invention is composed of three layers from inside to outside, specifically, a conductor 1, an inner insulating layer 2 and an outer insulating layer 3, wherein the conductor 1 is a conventional conductor adopted by a conventional electric wire or cable, and the present invention is not limited thereto, and those skilled in the art should understand that; the high-density radiation crosslinked polyethylene material is characterized in that the inner insulating layer 2 is made of a high-density radiation crosslinked polyethylene material, the high-density radiation crosslinked polyethylene material has excellent electrical insulating performance, good electrical insulation protection is provided for the inner conductor 1, and the high-density radiation crosslinked polyethylene material further has the characteristics of high temperature resistance, durability and wear resistance, can keep long-time structural stability under a high-temperature condition, and can solve the problem of inconvenience in replacing aged wires or potential safety hazards caused by the fact that the service lives of wires and cables and the property years of houses are asynchronous, wherein the conventional high-density radiation crosslinked polyethylene material is at a rated working temperature, and the thermal aging life of the conventional high-density radiation crosslinked polyethylene material can reach more than 80 years. The outer insulating layer 3 is made of irradiation cross-linking ceramic polyolefin material, the irradiation cross-linking ceramic polyolefin material is a novel material, a special functional new material is added on the basis of a conventional high-molecular polymer, the irradiation cross-linking ceramic polyolefin material not only has the characteristics of durability, high temperature resistance and the like of the conventional irradiation cross-linking polyolefin, but also is more special, the flame retardance of the material can be greatly enhanced, and the specific principle is as follows: the outer insulating layer 3 is used as the outer insulating layer 3 of the halogen-free low-smoke high-performance wire and is positioned at the outermost layer of the wire, when a fire disaster happens, the outer insulating layer 3 burns to form hard ceramic substances, so that a good flame-retardant effect can be achieved, and the fire can be effectively prevented from being transmitted on the wire, so that a good fireproof effect can be achieved; in addition, the ceramic substance formed by sintering can also play a certain role in protecting the internal structure, and when a fire disaster happens, the possibility of power failure caused by burning through of the electric wire can be greatly reduced, so that electric power support is provided for escape of people, and the escape probability of the people is increased.

In view of more optimized structural design, on the basis, the thickness 2 of the inner layer and the outer layer of the halogen-free low-smoke high-performance wire is smaller than the thickness of the outer insulating layer 3, specifically, the thickness of the inner insulating layer 2 is not more than 0.2mm, and the thickness of the outer insulating layer 3 is not less than 0.6 mm; in addition, when the sheath insulating layer structure is produced, preferably, the inner insulating layer 2 and the outer insulating layer 3 are prepared by one-time irradiation crosslinking of an electron accelerator, and in addition, the inner insulating layer 2 and the outer insulating layer 3 are in a co-extrusion structure, namely the inner insulating layer 2 and the outer insulating layer 3 are prepared by an integral co-extrusion molding process, so that the inner insulating layer 2 and the outer insulating layer 3 can be attached more tightly, and the stability of the whole structure is improved; in addition, the inner insulating layer 2 plays a main role of electrical insulation, and in order to provide a sufficient insulating effect, the volume resistivity of the high-density radiation crosslinked polyethylene material is not less than 5 x 10¹⁴Ω*m。

The utility model discloses a there is not steamed low cigarette high performance electric wire adopts high density irradiation crosslinked polyethylene's inner insulating layer 2 and irradiation crosslinked ceramic polyolefin material's outer insulating layer 3 to wrap outside conductor 1, provides good electric insulating property for the electric wire through thinner high density irradiation crosslinked polyethylene, can provide very excellent fire behaviour for the electric wire through thicker irradiation crosslinked ceramic polyolefin material; in addition, these two kinds of materials all possess low smoke and zero halogen's characteristic, can not emit noxious material such as dense smoke, chlorine when burning, are favorable to personnel to flee for one's life to these two kinds of materials still possess high temperature resistant and durable characteristics, can make no halogen low smoke high performance electric wire life under rated temperature reaches 80 years, and this highly matches with the age limit of house property right, has solved current building electric wire because insulating sheath material life is short with house property right or service life line mismatch the very big inconvenience of the ageing electric wire of change that leads to and the potential safety hazard that probably causes.

The following description is given by way of specific examples of embodiments of the halogen-free low-smoke high-performance electric wire of the present invention:

examples

This embodiment there is not steamed low cigarette high performance electric wire adopts 2.5 square millimeter's copper core conductor, and its outside cladding has 0.2 mm's internal insulation layer and 0.8 mm's outer insulating layer respectively, the internal insulation layer is high density irradiation crosslinked polyethylene material, the outer insulating layer is irradiation crosslinked ceramic polyolefin material, internal insulation layer and outer insulating layer adopt the once only irradiation of electron accelerator to crosslink and make through the crosslinking and the forming technology of integral type coextrusion.

The halogen-free low-smoke high-performance wire is made of halogen-free materials, meets the environmental protection requirement of European Union ROHS2.0, is tested according to IEC60332 standard, and meets the flame-retardant requirement of A class; according to GB/T17651 test, the minimum light transmittance is more than or equal to 80 percent, and the requirement of the low-smoke cable is met; testing according to BS6387 standard, the fireproof performance meets the requirements of CWZ cables; in addition, the maximum long-term working temperature is 125 ℃; the insulation resistance at 125 ℃ is more than or equal to 2.0M omega x km; the service life of the halogen-free low-smoke high-performance wire reaches 80 years, and the wire is suitable for being used as a building wire.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. The utility model provides a there is not steamed low cigarette high performance electric wire which characterized in that, by interior to exterior including the conductor respectively, inner insulation layer and outer insulating layer, wherein, inner insulation layer is high density irradiation crosslinked polyethylene material, outer insulating layer is irradiation crosslinked pottery polyolefin material.

2. The halogen-free, low-smoke, high-performance wire of claim 1, wherein the thickness of the inner insulating layer is less than that of the outer insulating layer.

3. The halogen-free, low-smoke, high-performance wire of claim 2, wherein the thickness of the inner insulating layer is no more than 0.2 mm; the thickness of the outer insulating layer is not less than 0.6 mm.

4. The halogen-free, low-smoke, high-performance wire of claim 1, wherein the inner and outer insulating layers are of a co-extruded structure.

5. The halogen-free low-smoke high-performance wire according to claim 1, wherein the inner insulating layer and the outer insulating layer are made of a cross-linked material by electron accelerator one-time irradiation.

6. The halogen-free low-smoke high-performance electric wire as claimed in claim 1, wherein the volume resistivity of the high-density irradiation crosslinked polyethylene material is not less than 5 x 10¹⁴Omega m, the oxygen index of the radiation cross-linked ceramic polyolefin material is more than 33%.