JPH07182929A - Insulated wire with self welding ability - Google Patents

Abstract

PURPOSE:To provide an insulated wire with self welding ability which gives no secular change to an electrical equipment coil in shape after being wound thereon, stuck thereto and pressure molded therewith and also provide the electrical equipment coil, obtained by winding, adhesion and pressure molding, with excellent thermal deformation resistance capable of being exhibited at a high temperature. CONSTITUTION:A paint which is formed by dissolving in organic solvent, resin component farmed by adding 5-50 pts.wt. nylon 12 resin with the relative viscosity of 0.5%m cresol solution being 0.5-3.0 at 25 deg.C 100 pts.wt. copolymer polyamine resin is applied and baked to a conductor directly or via some other insulating layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-bonding insulated electric wire. More specifically, the present invention relates to a self-fusing insulated electric wire that can be used as a magnet wire of an electric equipment coil, for example, a deflection coil of a television.

[0002]

2. Description of the Related Art Since a self-fusing insulated electric wire is provided with a fusing layer as the outermost layer, an electric equipment coil obtained by winding these self-fusing insulated electric wires conducts electricity between adjacent wires. It can be easily adhered by a method such as heat fusion, heat fusion in a constant temperature bath, hot air blowing heat fusion, organic solvent dipping and dry welding.

As described above, since the self-fusing insulated electric wire can omit the step of impregnating the insulating varnish and the like, thereby reducing the productivity and the manufacturing cost of the electric equipment coil, it can be used for household electric equipment, OA equipment, electrical equipment and the like. It is becoming widely used as a magnet wire.

The enamel wire is a type of insulated wire formed by applying an insulating coating material such as polyurethane coating material, formal resin coating material, polyester coating material, polyester imide coating material, polyamide imide coating material, polyimide coating material, etc. on the conductor a plurality of times and baking it. is there.

The self-fusing insulated electric wire is formed by coating and baking a fusing paint on the upper layer of the insulating coating film of these enameled wires.

Conventionally, polyvinyl butyral resin coatings, copolyester resin coatings,
Copolyamide resin paints, phenoxy resin paints, etc. have been used.

In recent electric equipment, in order to meet the demands for downsizing, heat resistance, high voltage, high frequency, and space factor improvement of electric equipment coils, excellent adhesive strength characteristics and heat resistance even at high temperature A self-fusing insulated electric wire that retains deformability is desired.

However, polyvinyl butyral resin is a synthetic resin having the lowest thermal softening temperature among the conventionally used fusing materials, and cannot meet the demand for improvement in heat resistance. Further, the copolymer polyester resin coating material has a higher thermal softening temperature than the polyvinyl butyral resin, but the adhesive strength characteristics are inferior to the copolymer polyamide resin, and the thermal softening resistance is not so good.

Further, the phenoxy resin has a higher thermal softening temperature than the two types of copolymerized polyamide resin and copolymerized polyester resin, but the absolute value of the adhesive strength is low, which is a problem.

On the other hand, the copolyamide resin is most widely used because of its high adhesive strength, but it cannot completely meet the demands for improvement of heat resistance and prevention of aging of pressure-molded coil.

That is, when a deflection coil is wound, adhered and pressure-molded using a self-bonding insulated electric wire formed by coating and baking a conventional paint containing a copolyamide resin as a main component, it is preferable. Although it exhibits adhesiveness, there is a drawback that the coil shape is deformed with time when left at room temperature for a long time after compression molding, and further, when it is exposed to a high temperature after compression molding.

As described above, when the shape of the pressure-molded coil changes with time or when the heat-deformed deflection coil is incorporated into a television or the like and used, the workability of assembling is deteriorated and the color shift of the television is caused. Become. For this reason, the deformed coil requires manual correction work.

In order to improve the heat distortion resistance of a self-fusing insulated electric wire formed by coating and baking a coating material containing a copolyamide resin as a main component, a plurality of copolyamide resins may be blended. Although it can be improved to some extent, on the other hand, a decrease in adhesive strength is unavoidable, and as a result, fraying occurs due to an adhesive defect.

On the other hand, the deflection coil is wound, adhered and pressure-formed by using a self-fusing insulated electric wire formed by coating and baking a paint containing a copolyamide resin as a main component on the conductor. The amount of change over time is 2 to 3 times that of a self-fusing insulated wire made by coating and baking a paint containing phenoxy resin as a main component. Diurnal change cannot be prevented.

[0015]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to solve the above-mentioned drawbacks of the prior art and to wind, bond, There is no change over time in the coil shape after pressure molding,
Moreover, it is an object of the present invention to provide a self-bonding insulated electric wire in which an electric device coil obtained by winding, adhering, and pressure-molding can exhibit excellent heat distortion resistance at high temperatures.

[0016]

SUMMARY OF THE INVENTION The gist of the present invention is that 2 parts per 100 parts by weight of a copolyamide resin are used.
On the conductor, a paint prepared by dissolving 5 to 50 parts by weight of 12 nylon resin having a relative viscosity of 0.5 to 3.0 of 0.5% m-cresol solution at 5 ° C. in an organic solvent is dissolved. A self-bonding insulated electric wire, characterized in that it is formed by coating and baking it directly or through another insulating layer.

In the present invention, the copolyamide resin is obtained by copolymerizing two or more kinds of homonylon raw materials.

B of this type of copolyamide resin
ASF Ultra Mid 1C, Toray CM-400
0, CM-4001, CM-8001, T-170, T-250, T-350, T43 from Daicel Huls.
0, T450, T470, T-550, B-409, L-540, H-005, H-103 of Rilsan Japan Co., Ltd.
H-104, H-105, H-106, M-957, M
-1186, M-1259, m1276, M-142
2, M-1425, M-1426, etc. These can be used alone or in appropriate combination.

In the present invention, 12 nylon is ω
It is obtained by ring-opening polymerization of laurolactam.

The reason why the 12 nylon resin in the present invention is limited to those having a relative viscosity of a 0.5% m-cresol solution at 25 ° C. of 0.5 to 3.0 is as follows.

That is, the molecular weight of 12-nylon resin having a relative viscosity of 0.5 or less is too small, and as a result, the improvement of the deformation preventing property at room temperature and high temperature cannot be exhibited. On the other hand, 2 nylon resin with a relative viscosity of 3.0 or more is desirable for the effect of improving the deformation resistance, but the molecular weight becomes too large and the viscosity of the paint when it is made to increase, thereby rapidly improving the workability of enamel coating. There is a drawback that it worsens.

In the present invention, 0.5% m-at 25 ° C. is added to 100 parts by weight of the copolyamide resin.
The reason for limiting the addition of 5 to 50 parts by weight of 12 nylon resin having a relative viscosity of the cresol solution of 0.5 to 3.0 is as follows. That is, in the case of a self-bonding insulated electric wire containing 5 parts by weight or less of 12 nylon resin, when the deflection coil is left at room temperature after winding, bonding, and pressure molding, the shape of the coil changes with time and when exposed to high temperatures. This is because the thermal deformation that occurs in the can not be effectively suppressed. Conversely, 12
In the case of a self-bonding insulated wire with 50 parts by weight or more of nylon resin, the bonding start temperature when the deflection coil is wound and bonded is rapidly increased, and as a result, when the deflection coil is wound and bonded, the bonding defect is caused. This is because frequent defects occur.

[0023]

The self-fusing insulated wire of the present invention makes use of the excellent cohesive strength and low-temperature adhesiveness of the copolyamide resin by using the copolyamide resin as the base polymer of the fusion layer. Polymerized polyamide resin 10
Copolyamide resin self-fusion by adding 5 to 50 parts by weight of 12 nylon resin having a relative viscosity of 0.5 to 3.0 of 0.5% m-cresol solution at 25 ° C. to 0 parts by weight It is possible to effectively suppress the shape deformability of the flexible insulated wire at room temperature and high temperature after coil forming.

[0024]

EXAMPLES Next, examples of the self-fusing insulated electric wire of the present invention will be described together with a conventional comparative example. It should be noted that these examples are some examples of the present invention, and the present invention is not limited to these.

Example 1 First, 100 parts by weight of M-1425 manufactured by Rilsan Japan Co., Ltd. was used as a copolyamide resin, and 0.5 nylon at 25 ° C. was used as a 12 nylon resin.
% M-cresol solution has a relative viscosity of 1.8, and 10 parts by weight of L-1800 manufactured by Daicel Hüls Ltd. is taken as a resin component, and then these resin components are mixed at a weight ratio of m-cresol and xylene of 60: It dissolves in 40 mixed solvents and has a resin content of 1
A 5% self-fusing paint was prepared. Next, the conductor diameter φ0.
A polyesterimide enameled wire of 400 mm and heat-resistant class H (180 ° C class) was prepared.

Then, 15% of the self-fusing paint was applied to the upper layer of the enamel coating film of this H-type polyesterimide enameled wire, and the excess paint was squeezed out with a die, and then in an enameled wire baking furnace at 400 ° C. And was baked. By repeating the operation of applying the self-adhesive coating material, squeezing down the die, and baking four times, the thickness of the adhesive layer can be reduced to 0.
A 01 mm self-bonding insulated electric wire of Example 1 was obtained.

(Example 2) 25 as 12 nylon resin
Self-fusing of Example 2 in the same manner as in Example 1 except that 20 parts by weight of L-1640 manufactured by Daicel Hüls Ltd. having a relative viscosity of 0.5% m-cresol solution at 1.6 ° C. of 1.6 was blended. The electrically insulated wire was obtained.

(Example 3) As a copolyamide resin, T-470 manufactured by Daicel Hüls was used, and as a 12 nylon resin, a relative viscosity of a 0.5% m-cresol solution at 25 ° C was 1.6. L company L-1
A self-bonding insulated electric wire of Example 3 was obtained in the same manner as in Example 1 except that 20 parts by weight of 640 was blended.

(Example 4) As a copolyamide resin, T-170 manufactured by Daicel-Huls was used, and as a 12-nylon resin, a relative viscosity of a 0.5% m-cresol solution at 25 ° C was 1.8. L company L-1
A self-bonding insulated electric wire of Example 4 was obtained in the same manner as in Example 1 except that 20 parts by weight of 800 was blended.

Example 5 As a copolyamide resin, T-170 manufactured by Daicel-Huls was used, and as a 12-nylon resin, a relative viscosity of a 0.5% m-cresol solution at 25 ° C. was 1.6, which was Daicel-Hul. L company L-1
A self-bonding insulated electric wire of Example 5 was obtained in the same manner as in Example 1 except that 30 parts by weight of 640 was blended.

Comparative Example 1 Pratamide M1425 manufactured by Rilsan Japan Co., Ltd. as a copolyamide resin was dissolved in a mixed solvent of m-cresol and xylene at a weight ratio of 60:40,
A Pratamide M1425 paint having a resin content of 15% was prepared.

Then, the conductor diameter φ0.
A polyesterimide enameled wire of 400 mm and heat-resistant class H (180 ° C class) was prepared.

Then, the H-type polyesterimide enameled wire was coated with 15% of pratamid M14 on the enamel coating upper layer.
Twenty-five paints were applied, excess paint was squeezed out with a die, and then passed through an enameled wire baking oven at 400 ° C. for baking. By repeating the operation of applying this 16% of Pratamide M1425 paint, squeezing the die, and baking four times, the thickness of the Platamide M1425 fusion layer is 0.0
A 1 mm self-fusing insulated electric wire of Comparative Example 1 was obtained.

(Comparative Example 2) T-470 manufactured by Daicel Hüls Ltd. was used as a copolyamide resin to 100 parts by weight, and as a nylon resin, 0.5% m at 25 ° C.
A self-fusing insulated electric wire of Comparative Example 2 was obtained in the same manner as Comparative Example 1 except that 3 parts by weight of L-1800 manufactured by Daicel Hüls Co., which had a cresol solution having a relative viscosity of 1.8.

(Comparative Example 3) As a copolymerized polyamide resin, 100 parts by weight of T-170 manufactured by Daicel Hüls Ltd. was used as 12 nylon resin and 0.5% m at 25 ° C.
-A self-bonding insulated electric wire of Comparative Example 3 was obtained in the same manner as Comparative Example 1 except that 55 parts by weight of L-1640 manufactured by Daicel Hüls Co., which had a relative viscosity of 1.6 of the cresol solution was blended.

(Test Method) Regarding the self-fusing insulated electric wires of Examples and Comparative Examples thus obtained, first, the conductor diameter and the fusion coating thickness were measured.

Further, the obtained self-fusing insulated wires of Examples and Comparative Examples were at room temperature of 25 ° C. and relative humidity of 40%.
Winding machine (Model 18 manufactured by Taga Seisakusho)
According to 1), the deflection coil was wound, fused and pressure-molded to form the deflection coil. The deflection coil thus taken out was allowed to stand at room temperature for 48 hours, and then the neck diameter shown in FIG. 1, the degree of twist, the presence or absence of fraying due to an adhesive defect, and the like were measured.

In FIG. 1, 1 is an upper fringe portion,
Reference numeral 2 is a neck portion, 3 is a body portion, and 4 is a lower fringe portion.

The deformation of the coil shape is shown by numerical values such as the amount of change in the diameter of the neck portion 2 of the deflection coil as shown in FIG.

FIG. 2 is an explanatory view showing a method of measuring the twist amount of the deflection coil.

As can be seen from FIG. 2, the amount of twist was set so that the deflection coil was laid on a flat horizontal surface 5, and then the distance between the arrows was measured.

Further, regarding the above-mentioned deflection carp, further 12
Leave it in a constant temperature bath at 0 ° C for 24 hours, and then take out the deflection coil to room temperature and measure the amount of change in the diameter of the neck 2, the amount of change in the degree of twist, and the presence or absence of fray due to adhesion defects. did.

The judgment of the fray due to the adhesion defect of the deflection coil is shown by the number of coils having the fray defect among the 30 samples.

Table 1 shows the results of these tests.

[0045]

[Table 1]

As can be seen from Table 1, in the self-bonding insulated electric wire of Comparative Example 1, the deflection coil obtained by winding, fusion-bonding and pressure-forming the deflection coil was first left at room temperature for 48 hours. The amount of twist change from the beginning is as large as 1.20 mm,
There is also a drawback that the amount of thermal deformation is as large as 0.20 mm.

The self-bonding insulated wire of Comparative Example 2 is
Similar to the self-bonding insulated wire of Comparative Example 1, the deflection coil obtained by winding, fusing, and pressure-forming the deflection coil at room temperature for 48 hours has a twist variation of 1.10 mm. There is a drawback that it is large and the amount of thermal deformation is large at 0.50 mm.

Furthermore, the self-bonding insulated wire of Comparative Example 3 is
Although the deflection coil obtained by winding, fusion-bonding and pressure-forming the deflection coil was left at room temperature for 48 hours, the amount of twist change was small at 0.30 mm, but all the coil frays.

An examination was also conducted for a compound containing 20 parts by weight of 12 nylon resin having a relative viscosity of 0.1 to 0.4 of a 0.5% m-cresol solution at 25 ° C., but the shape deformability was large. And again, the relative viscosity is 3.
Although the thing of 5 to 4.0 was also examined, the viscosity of the paint was high and the paintability was poor.

On the other hand, in the self-bonding insulated electric wires of Examples 1 to 5 of the present invention, there is no fraying due to adhesion defects when winding and fusing the deflection coil, and even if they are heated, fraying increases. The obtained coil did not change with time even when left at room temperature, and exhibited excellent heat distortion resistance even at high temperature.

[0051]

EFFECTS OF THE INVENTION The self-fusing insulated electric wire of the present invention is free from fraying due to an adhesive defect when winding and fusing a coil, and even if the coil obtained there is left at room temperature, the shape of the coil is aged. It has no change and can exhibit excellent heat distortion resistance even at high temperatures, and is industrially useful.

[Brief description of drawings]

FIG. 1 is a front view of a deflection coil obtained by winding and adhering a self-bonding insulated electric wire of the present invention.

FIG. 2 is an explanatory view showing a method for measuring a twist amount of a deflection coil obtained by winding and adhering a self-fusing insulated electric wire of the present invention.

[Explanation of symbols]

 1 Upper fringe part 2 Neck part 3 Body part 4 Lower fringe part 5 Horizontal surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fukuyo Sotozaki No. 108-8 Sayamagahara Matsubara, Iruma City, Saitama Prefecture Hanajima Electric Cable Co., Ltd. Saitama Factory

Claims (3)

[Claims] 1. To 100 parts by weight of a copolyamide resin, 5 to 50 parts by weight of 12 nylon resin having a relative viscosity of 0.5 to 3.0 of a 0.5% m-cresol solution at 25 ° C. is added. A self-bonding insulated electric wire, characterized in that a coating material obtained by dissolving the resin component formed in an organic solvent is applied and baked on a conductor directly or through another insulating layer. 2. The self-bonding insulated electric wire according to claim 1, wherein the coating material is a blend of lubricating materials. 3. The self-bonding insulated electric wire according to claim 1, wherein a lubricating coating layer is provided on the outermost layer.