CN100359610C

CN100359610C - Multi-layer insulated electrical wire

Info

Publication number: CN100359610C
Application number: CNB200410088462XA
Authority: CN
Inventors: 胡仁耀
Original assignee: GUO KUANG ELECTRONIC WIRE CO Ltd
Current assignee: GUO KUANG ELECTRONIC WIRE CO Ltd
Priority date: 2004-10-29
Filing date: 2004-10-29
Publication date: 2008-01-02
Anticipated expiration: 2024-10-29
Also published as: CN1767081A

Abstract

The present invention discloses a multilayer insulated electric wire which is consistent with the safety standard. The multilayer insulated electric wire is composed of a conductor and at least two insulating layers which coat the conductor, and thermoplastic plastic cement with fluorine is utilized to form the insulating layers. Moreover, any two adjacent insulating layers are made of different thermoplastic plastic cement with fluorine, so that the two insulating layers can be separated. Thus the problems that the break of one insulating layer causes other insulating layers to break at the same time and consequently the insulating effect is not good can be avoided. Besides, the invention also has the special properties of thermoplastic plastic cement materials with fluorine, such as heat resistance, pressure resistance and good insulating effect. In addition, the multilayer insulated electric wire of the present invention does not need any insulating tape or insulating sleeve for insulation, and therefore, the present invention can simplify manufacturing procedure and save cost.

Description

Multi-layer insulated electrical wire

Technical field

The present invention relates to a kind of multi-layer insulated electrical wire, particularly a kind of multi-layer insulated electrical wire that meets the security regulations standard.

Background technology

Being configured in IEC (the International ElectrotechnicalCommunication Standard) standard 60950 of transformer has following regulation for coil:

1, must form the thickness of at least three layers insulating barrier (but the paint film of coating conductor is not considered to insulating barrier) or insulating barrier between primary winding and secondary coil must be more than 0.44mm.

2, the distance between primary winding and the secondary coil face, though different and different according to the voltage that applies, must keep more than the 5mm.

3, applying 3000 volts of voltages in primary winding and secondary coil side (v) the time, must can tolerate more than 1 minute.

For this reason, present most transformer all adopts insulating case (insulating barrier) and coated insulation adhesive tape to be insulated, all the peripheral both sides of the roll on transformer core (bobbin) dispose the insulating case that keeps certain distance, again with insulating tape reel be coated with lacquer conductor repeatedly, after reaching certain distance, promptly finish whole isolation step, perhaps, coat out the three-layer insulated layer that meets the IEC standard with insulating tape, can omit insulating case.

Yet, in the method for above-mentioned prior art, when insulating tape is reeled, the loaded down with trivial details problem of operation will be produced, if insulating tape breaks or during bad in addition, certainly will can cause things such as the not good or electric shock of insulation effect again, and speed of production is slow, manufacturing cost is high and the labor intensive resource, the problems referred to above have become problem demanding prompt solution.

So proposed to be used as meeting the scheme of the multi-layer insulated electrical wire of security regulations standard with three layer lines, announcing No. 5606152, TaiWan, China patent gazette as United States Patent (USP) announces described in the 374181st, 388887,409263, No. 428178, be to make the three-layer insulated layer that meets security regulations with polyamide materials such as (PA resins), but the temperature resistant grade of these materials is lower, combustion-supporting easily, and can produce poisonous gas, if be used for transformer coil, Yin Gaowen and cause the not good problem of insulation easily.

Summary of the invention

The technical problem to be solved in the present invention is to overcome the defective that exists in the above-mentioned prior art, provides a kind of heat-resisting, withstand voltage, and the good multi-layer insulated electrical wire of insulation effect.

Another technical problem that the present invention will solve is to provide the multi-layer insulated electrical wire that a kind of production process is simple and easy and cost is low.

According to multi-layer insulated electrical wire of the present invention, comprising: the aforementioned conductor of conductor and coating and have two-layer at least insulating barrier; The present invention utilizes fluorine-containing thermoplastic plastic to form insulating barrier, and arbitrarily adjacent two-layerly constituted by different fluorine-containing thermoplastic plastics, the insulating barrier that can peel off mutually of formation like this, break because of insulating barrier avoiding, cause other layers also to break simultaneously, thereby produce the not good problem of insulation, in addition, also make multi-layer insulated electrical wire of the present invention have the performance of peculiar heat-resisting, the withstand voltage and good insulating effect of fluorine-containing thermoplastic plastic's material.

Description of drawings

Fig. 1 is a profile of the present invention.

Fig. 2 is the schematic diagram of another embodiment of the present invention.

Fig. 3 is the schematic diagram of another embodiment of the present invention as transformer coil.

Embodiment

About preferred embodiment of the present invention and technology contents, existing accompanying drawings is as follows:

The present invention utilizes fluorine-containing thermoplastic plastic's material characteristic, numerous and diverse production process of avoiding in the past need to use insulating tape and insulating case and bringing, and can meet in the security regulations requirement equally for the thickness of insulating layer of wire rod, now, be described with reference to the accompanying drawings as follows with regard to multi-layer insulated electrical wire of the present invention:

See also shown in Figure 1, it is profile of the present invention, multi-layer insulated electrical wire of the present invention comprises conductor 10 and the aforementioned conductor 10 of coating and has the insulating barrier of an internal layer 11 and a skin 12, this insulating barrier is formed by fluorine-containing thermoplastic plastic, and aforesaid internal layer 11 and outer 12 is made of different fluorine-containing thermoplastic plastics, and fluorine-containing thermoplastic plastic's preferred forms is the copolymer (FEP of tetrafluoroethene and hexafluoropropylene; Be designated hereinafter simply as FEP), or the copolymer (PFA of tetrafluoroethene and perfluoroalkyl vinethene; Be designated hereinafter simply as PFA), or the copolymer (ETFE of tetrafluoroethene and ethene; Be designated hereinafter simply as ETFE), or the copolymer (THV of tetrafluoroethene, hexafluoropropylene and vinylidene; Be designated hereinafter simply as THV), or the polymer (PVDF of inclined to one side fluorine second diene; Be designated hereinafter simply as PVDF), below promptly describe one by one at these fluorine-containing thermoplastic plastics' characteristic:

FEP is the copolymer of tetrafluoroethene and hexafluoropropylene, and its dissolving stickiness is lower and also can push, transmit, penetrate as other thermoplastic resin and compression molding processing.Because the adhesion between carbon and the fluorine atom is very high and molecule is saturated by fluorine atom fully, therefore the FEP fluorocarbon polymer has the high stability of heat, chemistry and electricity, under extremely low and high temperature range, in electricity, chemistry and medical application, all has good performance; Its key property is as follows:

The serviceability temperature wide ranges;

Fabulous anti-solvent, chemical resistance;

Excellent chemical resistance;

Fabulous electrical property;

The limited oxygen index height, not combustion-supporting.

PFA is the copolymer of tetrafluoroethene and perfluoroalkyl vinethene, its mechanical strength height at high temperature, and plasticity is good, therefore can use shaping processing methods such as extruding, compression, blowing, transmission and injection.Because the bond strength height of carbon, fluorine and oxygen atom, PFA are in-200 ℃～+ 260 ℃ temperature range, performance is good; Therefore PFA has the good transparency in melt-processed; Its key property is as follows:

The serviceability temperature wide ranges;

Anti-solvent and chemical property are fabulous;

Outstanding mechanical performance;

High weatherability and UV stable;

Excellent electric performance;

The limited oxygen index height: and under normal circumstances do not have flash-point;

High light transmittance;

The surface is very smooth;

Viscosity not;

Low frictional properties.

ETFE is the copolymer of tetrafluoroethene and ethene, has excellent chemical, hot property and electrical property, and has outstanding wearing property of friction resistant cutter, is the critical material of many industrial circles such as Aero-Space, automobile and chemistry.This product also is widely used in electric wire, conduit, hyposmosis pipe, radiation hardness film and the building film of nuclear power plant control room and other occasion needs; Its key property is as follows:

The service temperature wide ranges;

Low combustible;

Excellent electric energy and mechanical performance;

Fabulous anti-solvent and chemicals performance;

High outdoor weather resistance;

At visible region and ultraviolet region high light transmittance is arranged

Viscosity not;

Excellent tear resistance;

Good compressive resistance and fragility;

Hypotonicity;

Good radiation resistance.

THV is the copolymer of tetrafluoroethene, hexafluoropropylene and vinylidene, and its excellent performance combines with being convenient to process, and is that other melt-processable fluoroplastics are incomparable.The characteristic of THV tool in application such as the special flexible pipe of processing and fabricating, pipeline, electric wire, cable, protective coating and hypotonicity gas fuel system has an enormous advantage.On special film and solar energy diaphragm, increasing application is arranged also in addition; Its key property is as follows:

Low relatively processing temperature and processing temperature interval are suitable for extruding, coextrusion is injection-molded and blow moulded;

Laminated film;

Coating, dipping and blend;

Can corrosion resistant process equipment;

Compare with other fluoroplastics, have remarkable compliance;

Anti-main chemicals, as-inorganic and organic acid-halide-hydrocarbon-alcohols;

Hydrocarbon, fuel oil and other eroding chemical there is excellent anti-permeability;

Excellent optical transparency and permeability are particularly in ultraviolet light and visible region;

Be easy to bonding multiple elastomer and plastics than other fluoroplastics, tack is good;

Outdoor weather resistance is similar to other fluoroplastics;

High limited oxygen index is arranged, not combustion-supporting.

PVDF is the polymer of inclined to one side fluorine second diene, is widely used on chemical industry, semi-conductor industry and the electric wire, for example in fuel oil, automobile, building, electronics, chemistry, food and the medical processing procedure; Its key property is as follows:

Excellent mechanical strength;

Favorable chemical resistance;

Serviceability temperature can reach 150 ℃ continuously;

Excellent abrasive and ageing-resistant;

Surface smoothing, not sticking stickiness;

Anti-UV, irradiation;

Good is fire-retardant;

Good osmotic-pressure-tolerant.

From above-mentioned narration for structure of the present invention and material behavior, can find out obviously that the present invention utilizes fluorine-containing thermoplastic plastic to form insulating barrier, and the internal layer 11 that faces mutually and outer 12 is made of different fluorine-containing thermoplastic plastics, therefore form the insulating barrier that to peel off mutually, break because of insulating barrier (shown in figure ectomesoderm 12) avoiding, cause other layers (shown in internal layer among the figure 11) also to break simultaneously and produce the not good problem of insulation, also has the fluorine-containing peculiar performance of thermoplastic plastic's material in addition, not only heat-resisting, withstand voltage, and good insulating effect, also can not need use insulating tape or insulating case to be insulated, therefore have the production process of simplification and cost-effective advantage, also can meet in the security regulations standard requirement for the wire insulation layer thickness.

See also Fig. 2, it is another embodiment of the present invention, as shown in the figure, comprise the aforementioned conductor 10a of conductor 10a and coating and have three layers insulating barrier, wherein as shown in Figure 1, adjacent arbitrarily two-layerly constituted by different fluorine-containing thermoplastic plastics, for example, the internal layer 11a of the most close conductor 10a is FEP, and the intermediate layer of facing mutually with internal layer 11a 13 is PFA, then can be the fluorine-containing thermoplastic plastic of FEP or other non-PFA with the outer 12a that intermediate layer 13 is faced mutually.

See also Fig. 3, be the schematic diagram of another embodiment of the present invention as transformer coil, comprise primary winding 20, secondary coil 30, an and iron core 40, wherein primary winding 20 is by first conductor 200 and aforementioned first conductor 200 of coating and has first internal layer 201, first intermediate layer 202, and the insulating barrier of first skin 203 constitutes, secondary coil 30 is by second conductor 300 and aforementioned second conductor 300 of coating and tool second internal layer 301, second intermediate layer 302, and the insulating barrier of second skin 303 constitutes, can save employed transformer insulation barrier of prior art and insulating tape like this, thereby simplify production process and saved cost.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. multi-layer insulated electrical wire by single conductor (10,10a) and the described conductor of coating (10,10a) and have two-layer at least coaxial layer of insulation and constituted, is characterized in that:

Described insulating barrier is made of fluorine-containing thermoplastic plastic, and arbitrarily adjacent two-layerly is made of different fluorine-containing thermoplastic plastics.

2. multi-layer insulated electrical wire according to claim 1 is characterized in that described fluorine-containing thermoplastic plastic is the copolymer of tetrafluoroethene and hexafluoropropylene.

3. multi-layer insulated electrical wire according to claim 1 is characterized in that described fluorine-containing thermoplastic plastic is the copolymer of tetrafluoroethene and perfluoroalkyl vinethene.

4. multi-layer insulated electrical wire according to claim 1 is characterized in that described fluorine-containing thermoplastic plastic is the copolymer of tetrafluoroethene and ethene.

5. multi-layer insulated electrical wire according to claim 1 is characterized in that described fluorine-containing thermoplastic plastic is the copolymer of tetrafluoroethene, hexafluoropropylene and vinylidene.

6. multi-layer insulated electrical wire according to claim 1 is characterized in that described fluorine-containing thermoplastic plastic is the polymer of inclined to one side fluorine second diene.