KR100335341B1 - Self-bonding enamel wire and litz wire - Google Patents

Abstract

The present invention relates to a heat-resistant strain self-melting enamel wire and a heat-resistant strain-resistant litz wire having a polyamide-based welding layer and a silicone lubrication layer.

The weight average molecular weight of the total nylon resin on the insulating coating of the conductor is 10,000-40,000 and the copolymerized nylon resin (I) having a melting point of 100-150 ° C, the copolymerized nylon resin (II) having a melting point of 155-230 ° C, phenolic resin and There is provided an enamel wire having a fusion layer composed of wax and coated with silicone oil thereon and a litz wire made therefrom.

The enameled wire and the Ritz wire are windings used for deflection yoke coils in CRT tubes used in high-definition color television or personal computers, and have excellent self-lubrication and adhesive strength. There is little to no convergence characteristics.

Description

Self-Fusing Enamelled Wire and Litz Wire {SELF-BONDING ENAMEL WIRE AND LITZ WIRE}

The present invention relates to a self-adhesive heat-resistant enamel wire and a heat-resistant strain-resistant litz wire having a welding layer and a silicone lubrication layer made of a polyamide-based self-adhesive varnish composition, and more particularly, excellent heat-strain resistance, line adhesion, It relates to enamelled wire and litzwire having self-adhesiveness and deflection yoke convergence.

Recently, high quality image processing apparatuses such as personal computers, color televisions, and high definition televisions are classified into two types, a CRT method and a liquid crystal method.

CRT type display devices are used for personal computers or televisions that require large-scale and fine screen processing, and liquid crystal display devices are used for laptops and portable TVs.

A deflection yoke coil is used in a dual CRT display device.

Deflection yoke coils are manufactured by winding coils using enameled wires and litz wires having self-adhesion properties, followed by energizing the windings of the wires to mutually heat weld the wires together.

At this time, thermoplastic copolyamide resin and thermosetting epoxy resin (phenoxy resin) are generally used as the self-sealing layer material used to impart self-adhesion property to the enamel wire.

Self-bonding enamelled wire and litz wire using copolymerized polyamide resin have excellent line adhesion and heat deformation resistance, and thermosetting resin (phenoxy resin) has heat-sealable deflection because the initial strain of deflection yoke coil is small. The torsion resistance of the yoke coil is excellent.

On the other hand, in recent years, the display device of the CRT has been increasing the scanning frequency and the operating temperature. Also, the adhesion between the magnet wire and the welded layer of the yoke coil used in the CRT type display device is prevented from being adhered to the line. Self-adhesive enamel wire and self-adhesive litz wire using copolymer polyamide resin having excellent properties have been widely used.

The self-adhesive enamel wire coated with the copolyamide resin used in the manufacture of the litz wire is applied to the welding layer. In this case, excellent line adhesion should be exhibited.

Therefore, in order to cope with the temperature rise in the specification, the heat deflection temperature of the fusion layer must be increased. That is, the self-fusion enameled wire has to have a high heat deflection temperature of the fusion layer, so that a copolymerized polyamide resin having a higher melting point than that of the conventionally used copolymerized polyamide resin should be used.

However, in terms of heat-sealing material, the Ritz wire made of self-melting enamelled wire using high melting point copolymerized polyamide resin has low self-melting property at low temperature range, and heat-melting workability and thermoforming work of deflection yoke coil. The castle is degraded.

In addition, there is a problem that the initial deformation of the heat welding deflection yoke coil obtained when winding and heat welding becomes large.

The initial deformation of the heat-sealed deflection yoke coil (coil deflection) is caused by various causes, mainly because of the high coefficient of linear expansion of the fusion layer material. That is, since the linear expansion rate of the copolymerized polyamide resin is larger than that of the thermosetting epoxy resin, the initial deformation of the yoke coil using the conventional copolymerized polyamide resin (coil bending) has been pointed out as a large disadvantage.

In contrast, a coil using a thermosetting epoxy resin (phenoxy resin) has an advantage of small initial deformation.

This initial deformation of the heat-sealed yoke coil causes a deflection of the magnetic field, and the three types of electron beams, red, green, and blue, do not fully converge and cause color defects of the color display device, thereby preventing color defects of the color display device. In order to do this, the initial deformation of the deflection yoke coil should be minimized.

Furthermore, it is believed that the mechanism of thermal deformation generation of the deflection yoke coil is because the residual stress at the time of hot welding and thermoforming is larger than the line adhesion of the deflection yoke coil.

In other words, the heat deformation mechanism of the deflection yoke coil is when the heat-sealed deflection yoke coil becomes high temperature due to the operating load of the display. Thermal strain occurs due to residual stress of.

Theoretically, once heat-sealed at the melting point temperatures of the self-welding enamel wire and the Ritz wire welding layer, the heat-strained yoke coils do not undergo thermal deformation at temperatures below the melting point. For example, when heat-sealed between 130 and 140 ° C, the yoke coil will not be thermally deformed at this temperature.

In practice, however, thermal deformation occurs at a temperature of 20-30 ° C. below the melting point of the copolymerized polyamide resin. For example, when a copolymerization polyamide resin having a melting point of 130 to 140 ° C is used as the welding layer, the deformation start temperature of the heat-sealed piece yoke coil is 100 to 120 ° C.

Furthermore, in the past, in order to improve the convergence characteristics of the flat yoke coil, in the manufacture of the enameled wire, after the self-fusion layer was coated, the solid paraffin was applied on the weld layer. In this case, the solid paraffin remained and rather This will change the convergence characteristics.

Accordingly, an object of the present invention is to provide an enameled wire having excellent line adhesion, self-lubrication, fusion and heat resistance.

Another object of the present invention is to provide a self-adhesive enamel wire having a welding layer in which a polyamide resin, a phenol resin, and the like are mixed.

It is yet another object of the present invention to provide an enameled wire having excellent convergence characteristics of a yoke coil.

Furthermore, another object of the present invention is to provide a heat-resistant strained litz wire made of the enamel wire of the present invention.

1 is a cross-sectional view showing an enameled wire according to the present invention,

2A to 2C are cross-sectional views showing a litz wire made of an enamel wire according to the present invention;

3 is a graph showing the welding force according to the temperature change of the litz wire according to the present invention.

* Brief description of the main parts of the drawing

1 ... conductor 2 ... insulating layer

3 ... Self fusion layer

According to one aspect of the invention,

In a self-sealing enameled wire having a fusion layer on a conductor insulating film,

The fusion layer is based on the solids weight of the welding layer

So that the weight average molecular weight of the total nylon resin is 10,000-40,000,

(1) 40-84% by weight of one or more copolymerized nylon resin (I) having a melting point temperature of the following Formulas 1a and / or 1b of 100-150 ° C .;

(2) 10-60% by weight of one or more copolymerized nylon resin (II) having a melting point temperature of the following Formulas 1a and / or 1b of 155-230 ° C;

(3) 5-15% by weight of a phenol resin of the following Chemical Formulas 2a and / or 2b; And

(4) 1-8% by weight wax;

Provided is a heat-strained self-adhesive enamel wire having excellent deflection yoke convergence, which is characterized by having a thin weld layer and a silicone oil applied on the weld layer.

(However, in the formula 1a and 1b, x is an integer of 1 to 13, R and R 'are the same or different hydrocarbons having 1 to 17 carbon atoms and n is an integer of 150 to 300.)

(However, in the formula 2a and 2b, R and R 'are the same or different hydrocarbons having 1 to 30 carbon atoms, n is an integer of 20 to 100.)

In another aspect of the present invention,

There is provided a litz wire of the enameled wire of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

In the present invention, a mixed composition of polyamide resin, phenol resin and wax selected in consideration of molecular weight and melting point is used as a fusion layer on a conductor insulating film and a silicon lubrication layer applied thereon, and self-lubrication property of the coating surface. Provided are enameled wires and litz wires that are excellent in welding strength, heat deformation and deflection yoke coils.

In the enameled wire of the present invention, as shown in FIG. 1, an insulating coating layer 2 is formed on the conductor 1 and a fusion layer 3 is coated thereon, and the enameled wire and the litz wire intended in the present invention. The physical properties of are achieved by the use of a mixture of nylon components having a specific melting point and phenolic resin in a self-adhesive varnish composition constituting the fusion layer and by a silicon lubrication layer applied on the fusion layer.

The fusion layer is composed of two polyamide components, a phenol resin and a wax.

As the first polyamide component, a copolymerized nylon resin (I) having a melting point of 100-150 ° C. as the basic resin is used at 40-84% by weight based on the weight of the fusion layer solids.

If the melting point temperature of the copolymerized nylon resin (I) is less than 100 ° C., the adhesiveness is lowered, and if the melting point temperature is higher than 150 ° C., the adhesiveness becomes incomplete due to undissolved nylon after the production of the enamel wire. The copolymerized nylon resin (I) is used in an amount of 40-84% by weight, preferably 56-78% by weight based on the total weight of the fusion layer solids.

When used in an amount of less than 40% by weight does not affect the improvement of the properties of the coating film is deformed after the production of enamel wire, if more than 84% by weight there is a problem that the adhesion is poor and cracks occur.

As the second polyamide component, one or more copolymer nylon resins (II) having a melting point of 155-230 ° C. in Formulas 1a and / or 1b are present in an amount of 10-60% by weight based on the weight of the fusion layer solids. Used.

If the melting point of the copolymer nylon resin (II) is less than 155 ° C torsional phenomenon occurs during molding adhesive processing after the production of enamel wire, and if it exceeds 230 ° C, there is a problem that the adhesion strength is lowered because the nylon resin is not completely dissolved during the film production.

Copolymer nylon resin (II) is used in amounts of 10-60% by weight, preferably 20-48% by weight, based on the total weight of solids.

If the amount is less than 10% by weight does not affect the improvement of the physical properties to improve the problem that is easily deformed occurs, if more than 60% by weight, the adhesion is degraded by a nylon resin that is not completely dissolved.

Further, the nylon resin mixture may include one or more nylon resins having a melting point of 155-230 ° C and a base component of one or more copolymerized nylon resins (I) having a melting point of 100-150 ° C represented by Formulas 1a and / or 1b. It is composed of the mixture of (II), because it is possible to expect the effect of improving the adhesion and deformation resistance when the nylon resin is melt-bonded by properly blending nylon resins having different melting point temperatures in consideration of the torsional phenomenon. .

On the other hand, the weight average molecular weight of the total nylon resin is 10,000-40,000, preferably 13,000-35,000. The weight average molecular weight of the total nylon resin is less than 10,000, the adhesion is poor due to the deformation caused by temperature changes, and if it exceeds 40,000, the workability is inferior and there is a problem of poor coating uniformity during film production.

In addition to the nylon resin, a phenol resin is used in the welding layer to increase the heat deformation. As the phenol resin, the phenol resin of Formula 2a and / or 2b is used in an amount of 5-15% by weight based on the weight of the total solid of the welding layer in consideration of adhesiveness and other physical properties. If it is less than%, the welding force decreases and deformation occurs. If it exceeds 15% by weight, the film surface becomes hard.

Waxes are used to impart self-lubricating properties with other additives.

Waxes include polymers including amides, silicones and polyethylenes, polypropylenes and polytetrafluoroethylenes, Lanolin, Bee, Canaba, Castor and Montan. One or more selected from the group consisting of (Montan) wax is used in an amount of 1-8% by weight based on the total weight of the weld layer solids.

If the wax is used in less than 1% by weight does not affect the physical properties during the film production, it does not exhibit a slip property, if the wax exceeds 8% by weight there is a problem in the coating film formation of the composition.

The welding layer is composed of nylon resins (I), (II), phenol resins and waxes as described above, and these components are dissolved in an organic solvent and then coated on an insulating layer with a welding varnish composition and dried to form a welding layer. do.

The organic solvent may be selected from two or more selected from the group consisting of σ-cresol, m-cresol, p-cresol, xylene, nitrobenzene, dimethylformamide, dimethylacetamide and N-methyl-2-pyrrolidone. Can be.

The solvent is used in an amount of 70-90% by weight, preferably 80-90% by weight of the deposition varnish composition in consideration of viscosity and the like. If the amount of the organic solvent is less than 70% by weight, the viscosity is high, which causes a lot of difficulties when coating the varnish composition on the wire. When the amount of the organic solvent exceeds 90% by weight, the viscosity is too low and the coating film riseability is lowered.

Furthermore, the enameled wire of the present invention has a lubrication layer of the above composition on the conductor on which the insulating layer is formed, as well as a silicon lubrication layer applied on the welding layer. The silicone lubrication layer is applied by applying a lubricant containing silicone oil on the fusion layer to improve the convergence characteristics of the deflection yoke coil in which enamel wire and litz wire are finally used.

Silicone oil is used in a mixture of a conventional organic solvent and cyclohexane in a 1: 1 or 4: 1 weight ratio in an amount of 0.03-0.5% by weight.

When silicone oil is added to the solvent at less than 0.03% by weight, it does not show the intended convergence improvement effect. When it is added at 0.5% by weight or more, the amount of oil may increase, and thus the self-adhesion of enameled wire may be lowered. .

The welding layer and the silicone lubrication layer are usually applied to the enamelled wire in a general amount. Furthermore, a plurality of heat-straining self-adhesive enamelled wires according to the present invention are twisted to produce heat-straining strained litz wires as shown in FIGS. 2A to 2C.

Hereinafter, the present invention will be described in detail through examples.

Example

Example 1 Preparation of Enameled Wire and Ritz Wire

To the three-necked plastic reaction vessel equipped with a stirrer was added a solvent in which cresol and xylene were mixed in a 1: 1 weight ratio as an organic solvent, followed by stirring, and each nylon resin mixture was added in the amounts shown in Table 1 below to 85 ° C. It was dissolved completely while raising the temperature. Thereafter, the mixture was cooled to 75 DEG C, and the phenol resin was added and dissolved in the amount shown in Table 1 below.

The reactants in which the phenol resin was completely dissolved were cooled to 40 ° C. and stirred at the temperature by adding and stirring the waxes shown in Table 1 in the amounts described, respectively, to prepare Inventive Examples 1 to 6 and Comparative Examples 1 and 2 as samples of the weld varnish composition.

On the other hand, after coating an insulating layer made of polyimide with a thickness of about 0.015 mm on a copper wire having a conductor diameter of 0.14 mm, the fusion varnish compositions of Inventive Examples 1 to 6 and Comparative Examples 1 and 2 were dried thereon. The coating layer was coated to 0.01 mm and cured at a baking temperature, that is, 320 ° C inlet temperature and 350 ° C discharge temperature, to form a weld layer.

Thereafter, silicone oil was added to the MERCK cresol and cyclohexane 1: 1 weight ratio mixed solvent in an amount of about 0.4% by weight and applied to the welding layer to which the welding varnish compositions of Inventive Examples 1 to 6 were applied to prepare enamel wire. It was.

Each of the enamelled wires prepared by applying the varnish compositions of Inventive Examples 1 to 6 and Comparative Examples 1 and 2 was evaluated for the following physical properties, and the varnish compositions of Inventive Examples 1 to 6 and Comparative Examples 1 and 2 were used as a welding layer. A litz wire made of twisted coated enamelled wire 7, 8 or 10 strands was manufactured, and then wound on a flat yoke coil and heat-sealed to prepare a deflection yoke coil.

division Inventive Example 1 Inventive Example 2 Inventive Example 3 Inventive Example 4 Inventive Example 5 Inventive Example 6 Comparative Example 1 Comparative Example 2 Nylon resin (Ⅰ) A 50 44.7 53.2 90 B 36.3 51.5 45.4 88 C 17 16.8 12 17.7 6.4 Nylon Resin (Ⅱ) D 17 22.3 17.7 17 E 36.3 32.2 22.7 Phenolic Resin 11 11.2 12 6.2 6.4 11.3 9 11 Waxes Amide 3.4 2.2 1.8 Polymer 2.8 3.6 3.2 0.2 Silicone 1.6 1.6 1.6 0.3 3.4 Lanolin One One Total solids (wt%) 100 100 100 100 100 100 100 100 Characteristics of enameled wire Outer diameter (mm) 0.191 0.192 0.191 0.191 0.192 0.191 0.191 0.191 Initial welding force (gf) 230 260 270 240 260 260 300 250 Adhesive force after thermal deterioration (gf) (120 ℃) 170 220 180 200 220 170 150 160 Adhesion holding force at high temperature (min) (120 ℃ -30gf) 30 < 30 < 30 < 30 < 30 < 30 < 10 < 15 < DY characteristics DY Coil Torsion 0.3 < 0.2 < 0.3 < 0.3 < 0.3 < 0.4 < 0.8 < 0.6 < Convergence Characteristics XH (mm) 0 0.03 -0.01 0.03 0.02 -0.05 -0.05 -0.1 Convergence change amount after heat treatment (100 ℃ / 500hrs) -0.05 -0.01 -0.05 -0.03 -0.02 -0.05 -0.12 -0.11

Nylon A: Platabond M1422, MX2441, Platmid H104, etc. of Atochem may be used, and in this embodiment, a resin having a melting point of 130 ° C. is used.

Nylon B: Huls's Vestamelt X2236, X1008, X7079, etc., Atochem's Platmid H105, Platabond M2269, etc. can be used, and the embodiment uses a resin having a melting point temperature of 128 ° C.

Nylon C: Huls's Vestamelt 171, 251, 351, 451, 471, etc. may be used, and the embodiment uses a resin having a melting temperature of 122 ° C.

Nylon D: Atochem Platabond M1271, B409, M1426, etc., and Vestamelt 3041, 3261, X4685, X1010, etc. on Hulse can be used, and in this embodiment, a resin having a melting temperature of 160 ° C. is used.

Nylon E: Platabond M1271, B409, M1426 from Atochem and Vestamelt 3041, 3261, X4685, X1010 from Huls, etc. may be used, and in this embodiment, a resin having a melting temperature of 180 ° C. may be used.

Polymer wax-based: polyethylene, polypropylene, polytetrafluoroethylene, etc. may be used. Examples include Cerafak 100 39, Minerpol 230, and SLIP-AYD SL-92, SLIP-AYD, BYK Chemie. Can be used.

-Amide wax: CERAFLOUR 930, 993, 960, etc. of BYK-CHEMIE and ARMOSLIP E, CP on AKZO NOBEL can be used.

Silicon Wax: TEG0410 from TEGO and PERENOL S 400 from Henkel may be used.

In addition, Lanolin, Bee, Canaba, Castor, Montan wax, etc. may be used.

Example 2 Characterization of Manufactured Ritz Wire

1. Finished outer diameter

(1) The finished wire diameter

Measurements were made using a micrometer with a scale of less than 0.001 mm. The finished outer diameter was taken from a sample of about 50 cm in length and measured at three locations at approximately the same angle on the same plane perpendicular to the conductor axis, and expressed as the average value thereof.

(2) stranded wire outer diameter

The stranded outer diameter is calculated according to the following equation.

Strand finished diameter ψD = √D X 1.155 X φd

(N: number of twisted strands, φd: plastic completion diameter)

2. Adhesion (adhesion) after initial and thermal degradation

Based on KSC 2321, 10 minutes at 180 ° C. and maintained at room temperature, the fusion strength (initial fusion strength) was measured. Also, the adhesive strength after thermal degradation was measured by deterioration at 120 ° C. for 168 hours and then maintained at room temperature.

3. Adhesion retention at high temperature

In the same manner as the fusion test (before measuring fusion strength), the sample was fixed at the top in a constant temperature bath at 120 ° C. and the other side (bottom) was subjected to a load of 30 g in the vertical direction to measure the adhesion retention time between the lines.

4. Adhesion Changes by Welding Conditions

Based on KSC 2321, the adhesive force for each fusion temperature was measured from 100 ° C. to 20 ° C. at intervals of 20 ° C. and is shown graphically in FIG. 3. The adhesive force should be small at low temperatures and larger as the temperature increases. As can be seen from the graph of FIG. 3, Comparative Examples 1 and 2 have a decrease in adhesive strength near 180 ° C., but Inventive Example 1-6 shows that the adhesive force continues to increase.

5. DY characteristic test.

(1) The torsionally molded DY coil of the DY coil was left to stand at 168hrs at room temperature, and compared with the initial DY. (2) Convergence After the molded DY coil was assembled, the convergence was measured by mounting on a CRT. As can be seen from the DY characteristic test results of Table 1, the enameled wire and the litz wire according to the present invention showed not only excellent torsional and convergence characteristics of the DY coil, but also a very small amount of change in convergence even after heat treatment.

The self-melting heat-resistant deformed enamel wire and the heat-resistant deformation-type litz wire of the present invention have a high crystallization energy of the fusion layer and a high elongation after heat treatment. In addition, self-adhesiveness, as well as the initial adhesive strength, the adhesive strength after heat deterioration is large, and has excellent adhesion at high temperatures. Accordingly, the deflection yoke coil has less torsion and the convergence characteristics are improved.

Therefore, the enameled wire and the litz wire having the fusion layer and the silicone lubrication layer of the present invention increase the self-lubrication and adhesion when forming a deflection yoke coil using the same, and at the same time adjust the cooling time to minimize the torsion phenomenon. Productivity is improved and industrial utilization is also increased.

The enameled wire and the Ritz wire are windings used for deflection yoke coils in CRT tubes used in high-definition color television or personal computers, and have excellent self-lubrication and adhesive strength. There is little to no convergence characteristics.

Claims (6)

In a self-sealing enameled wire having a fusion layer on a conductor insulating film, The fusion layer is based on the solids weight of the welding layer So that the weight average molecular weight of the total nylon resin is 10,000-40,000, (1) 40-84% by weight of one or more copolymerized nylon resin (I) having a melting point temperature of the following Formulas 1a and / or 1b of 100-150 ° C .; (2) 10-60% by weight of one or more copolymerized nylon resin (II) having a melting point temperature of the following Formulas 1a and / or 1b of 155-230 ° C; (3) 5-15% by weight of a phenol resin of the following Chemical Formulas 2a and / or 2b; And (4) 1-8% by weight wax; A heat-straining self-adhesive enamel wire having excellent deflection yoke convergence, characterized in that it has a thin welding layer and a silicone oil is applied on the welding layer. [Formula 1a] [Formula 1b] (However, in the formula 1a and 1b, x is an integer of 1 to 13, R and R 'are the same or different hydrocarbons having 1 to 17 carbon atoms and n is an integer of 150 to 300.) [Formula 2a] [Formula 2b] (However, in the formula 2a and 2b, R and R 'are the same or different hydrocarbons having 1 to 30 carbon atoms, n is an integer of 20 to 100.) The method of claim 1, wherein the wax is an amide-based, silicone-based, polyethylene-based, polypropylene-based, polytetrafluoroethylene-based, Lanolin, Bee, Canaba, Castor and Heat-strained self-adhesive enamelled wire, characterized in that it is selected from the group consisting of Montan wax. The method of claim 1, wherein the copolymerized nylon resin (I) is 56-78% by weight based on the total weight of the welding layer heat-resistant deformable self-adhesive enamel wire. The heat-transformation self-adhesive enamelled wire according to claim 1, wherein the total weight average molecular weight of the copolymerized nylon resins (I) and (II) is 13,000-35,000. The heat-strain-resistant self-adhesive enamel wire of claim 1, wherein the silicone oil is applied as a composition in which silicone oil is added and mixed in an amount of 0.03-0.5% by weight to a mixed solvent of an organic solvent and cyclohexane. Heat-resistant strained Ritz wire made of the enamel wire of any one of claims 1 to 5.