TW201005762A - Insulated wire - Google Patents

Abstract

To provide a multilayered insulating wire improved in heat resistance and excellent in solderability. The insulating wire has conductors 4a, 6a and at least single insulating layers 4b, 4c, 4d, 6b, 6c, 6d to coat the conductors. A polyester resin composition is used for the wire, which contains a polyester resin (A) containing 5 to 25 parts wt. liquid crystal polymer, in comparison with the polyester resin 75 to 95 parts wt. other than the liquid crystal for the resin composition constituting at least one layer of the insulating layer.

Description

201005762 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to an insulated wire. [Prior Art] The structure of the device is defined by the IEC specification (International Electrotechnical Communication Standard) Pub. 60950 and the like. That is, in these specifications, it is stipulated that at least three layers of insulating layers are formed between the primary winding and the secondary winding (the lacquer beta coating of the coated conductor is not recognized as an insulating layer). , or the thickness of the insulating layer is 0.4mm or more; the distance between the primary winding and the secondary winding varies depending on the applied voltage, but needs to be 5mm or more; and 30th is applied to the primary side and the secondary side. When 'can withstand more than 1 minute and so on. Under such specifications, in the past, the transformers in the mainstream position were constructed as shown in the cross-sectional view of Fig. 2. The structure of the transformer is attached to both sides of the circumferential surface of the bobbin 2 on the ferrite core 1, and is disposed in a state of being used to ensure the creeping protective layer 3 along the surface distance. After the primary winding 4 is coated, at least three layers of insulating tape 5 are wound on the primary winding 4, and further, an insulating protective layer 3 for ensuring the creeping distance is disposed on the insulating tape, and then rolled up in the same manner. The secondary winding 6 is wrapped around the lacquer. However, in recent years, a transformer constructed without the insulating protective layer 3 and the insulating tape layer 5 shown in Fig. 1 has been used in place of the transformer of the sectional structure shown in Fig. 2. This transformer has the advantages of being smaller than the transformer of the structure of Fig. 2, and omitting the winding operation of the insulating tape. 5 201005762 > When manufacturing the transformer shown in Fig. 1, the primary winding 4 and the secondary winding 6 used are required to be on the periphery of the conductor 4a (6a) of either or both due to the relationship of the above IEC specifications. At least three layers of insulating layers 4b (6b), 4c (6c), and 4d (6d) are formed. » Such a winding is known to wind an insulating tape around the conductor to form an insulating layer of the first layer, and further The insulating layer of the second layer and the insulating layer of the third layer are sequentially formed by winding the insulating tape thereon to form an insulating layer having a three-layer structure in which the layers are peeled off from each other. In addition, it is also known that the fluororesin is sequentially applied to the outer periphery of the conductor instead of the insulating tape to form an insulating layer of three layers as a whole (for example, refer to Japanese Unexamined Patent Publication No. Hei No. S-6112). However, in the case of the insulating tape roll, since the winding operation is unavoidable, the productivity is remarkably lowered, and therefore the wire cost is very high. In addition, in the case where the fluororesin is extruded, since the insulating layer is formed of a fluorine-based tree, the heat resistance is good, but the tree cost is two, and the shear rate is When the stretching is performed, the appearance of the yue & deteriorates. Therefore, it is difficult to increase the manufacturing speed, and as a result, the electric wire cost is high as in the case of the insulating tape roll. In order to solve such a problem, the crystallization is performed on the periphery of the conductor, and the modified polyester resin which is controlled to be controlled and the molecular weight reduction is suppressed is coated as an insulating layer of the first layer and the second layer, and is subjected to polymerization. A multilayer insulated wire which is an extrusion coating of an amine resin as a third insulating layer has been put to practical use (example = 'refer to U.S. Patent No. 5, No. 152, specification f, and Japanese Patent Laid-Open No. 6A). In addition, with the recent miniaturization of electrical and electronic equipment, it is concerned that the effect of heat on the machine is caused by the squeezing of the resin squeezing 6 201005762, and the squeezing of the melamine resin is applied to the outermost layer. A multi-layer insulated wire having improved heat resistance has been proposed (for example, refer to Japanese Laid-Open Patent Publication No. Hei 10-134642). However, when the wire-wound transformer is mounted on the machine forming circuit, the front end of the wire drawn from the transformer is exposed to the guide ship and is subjected to the welding process, so that a multi-layer insulated wire having good weldability is required.

Further, since it is treated by painting or the like, it is required to have a solvent-resistant property, but there is no current performance that satisfies all of the above properties. SUMMARY OF THE INVENTION The present invention provides the following means: (1) An insulated electric wire having a conductor and an insulating layer covering at least one of the conductors, characterized in that the insulating layer is formed A resin composition containing at least one layer of a resin composition containing a polyester resin (A) having a quality of 75 to 95 with respect to a polyester resin other than the liquid crystal polymer is used. (2) The insulated electric wire according to the item (1), wherein the polyester-based resin composition contains the thermoplastic elastomer (B), and the polyester resin is the above-mentioned polyester resin. (A) is a continuous layer of a resin dispersion in which the thermoplastic elastomer (B) is a dispersed phase; (3) The insulated electric wire according to (2), wherein the polyester resin composition is relative to the above-mentioned poly And the above-mentioned thermoplastic elastomer (B) is an insulating wire of the above-mentioned thermoplastic elastomer (B), wherein the thermoplastic elastomer (the above-mentioned thermoplastic elastomer (B) is 15 parts by mass or less; B) uses a compound selected from the group consisting of an epoxy group, an oxazole group, and an amino group. And a resin (B1) of at least one type of functional group in the group consisting of an anhydride residue; (5) an insulated wire according to (2) or (3), wherein the thermoplastic elastomer (B) a rubber-like core obtained by a mixture of an acrylate or a mercapto acrylate, or a mixture thereof, and a core-shell polymer (B-2) composed of a vinyl-based homopolymer or copolymer; (6) The insulated wire of (2) or (3), wherein the above thermoplastic elastomer (B) is used in a vinyl copolymer having a metal salt of a carboxylic acid or a carboxylic acid in a side chain (B- 3). The above and other features and advantages of the present invention will become apparent from the following description. [Embodiment] The materials used in the present invention will be described. (A) Polyester-based resin In the present invention, a resin composition comprising at least one layer of an insulating layer is a polyester system comprising a polyester resin other than a liquid crystal polymer and a liquid twin polymer. A polyester-based composition composed of the resin (A). (Polyester-based resin other than liquid crystal polymer) The polyester-based resin other than the liquid crystal polymer used in the present invention is preferably an aromatic dicarboxylic acid or a dicarboxylic acid in which a part thereof is substituted with an aliphatic dicarboxylic acid. An acid obtained by reacting an ester with an aliphatic diol. Representative examples thereof include polyethylene terephthalate resin (pET), poly(p-butylene dicarboxylate) (PBT), and polyparaxadiene glycolate resin (pEN). As the aromatic dicarboxylic acid used in the synthesis of the polyester resin,

S 201005762, for example, for stearic acid, isophthalic acid, terephthahc dicarb〇xyiic acid, diphenyl sulfone dicarboxylic acid, diphenoxy phenyl dicarboxylic acid, two stupid bonds Acid retardation, methyl terephthalic acid, methyl isophthalic acid, etc. Among these, especially for the stearic dicarboxylic acid is preferred. Examples of the aliphatic dicarboxylic acid partially substituted with one of the aromatic dicarboxylic acids include albinoic acid, adipic acid, and sebacic acid. The substitution amount of the aliphatic dibenzoic acid is preferably 30 mol% of the less than the aromatic diacid, and particularly preferably less than 20 mol%. On the other hand, examples of the aliphatic diol used for the ester reaction include ethylene glycol, propylene glycol, butylene glycol, adiphetic acid, and decanediol. Among these, ethylene glycol and butylene glycol are suitable. Further, in the case of the aliphatic diol, a part thereof may be an oxyglycol such as polyethylene glycol or polybutylene glycol. A commercially available resin which can be preferably used in the present invention, a polyethylene terephthalate (PET) resin, "Vyl〇pet (trade name, manufactured by Toyobo Co., Ltd.), Beirupat (manufactured by Chung-Sing Co., Ltd., trade name), Teijin pET (manufactured by Teijin Co., Ltd., trade name); and polyethylene naphthalate (PEN)-based resin, for example, Teijin PEN (manufactured by Teijin Co., Ltd., trade name) And a polybutylene terephthalate (PCT)-based resin, for example, Ekta (trade name, manufactured by Toray Industries, Inc.), etc. (liquid crystal polymer), the polyester resin of the present invention. (A) is a liquid crystal polymer. The liquid crystal polymer to be used is not particularly limited in molecular structure, density, molecular weight, and the like, and is preferably a molten liquid crystalline polymer (to a thermotropic liquid crystal polymer) which forms liquid crystal upon melting, and is used as the molten liquid crystalline polymer. The material is preferably melted. 9 201005762 Liquid crystalline polyester copolymer. The molten liquid crystalline polyester is obtained by: (1) two kinds of rigid linear polyesters having different lengths, which are obtained by block copolymerization. (II) a non-linear structure-introducing type of polyacetate obtained by block copolymerization of a straight-line type polyester and a straight non-linear polyester, (III) a curved chain-guided type of polyacetate obtained by copolymerizing a straight linear polyacetate with a f-shaped polyacetic acid, and (IV) a straight-chain bond (suffehain^ linear poly-S A person has a nucleus of a substituent to replace an aromatic-type polyester. The repeating unit of the vinegar can be exemplified by the following: a. from an aromatic monocarboxylic acid; b. from Fangxianggu A ^ ^, - a group of alcohols, c_ from the Fangxiang group based on acid but not limited . Thereto and other lean 'a repeating unit derived from an aromatic dicarboxylic acid of: 201 005 762 Reference

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12 201005762 Based on the balance between the workability in the film formation step, the heat resistance, the mechanical properties of the insulating film, and the like, the liquid crystal polymer preferably contains at least 3 Å of the repeat unit including the repeat unit described below. More than % (usually 80% or less) is better.

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A preferred combination of repeating units, a combination of repeating units can be exemplified in the following (I) to (VI).

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The method for producing such a liquid crystal polyester is disclosed in Japanese Laid-Open Patent Publication No. 23, Japanese Patent Publication No. Hei No. 3, No. JP-A No. 63-3891, and the like. Among these, a combination shown by (1), (II), and (V) is preferable, and a combination shown by (V) is more preferable.

The liquid crystal polymer has a flow temperature of 30 (rc or more) and the viscosity at the time of melting is also the same as that of the conventional polyethylene terephthalate or 6,6 胄, so that it can be extruded at a high speed. Pressure and coating treatment, and film can be manufactured at low cost. The liquid crystal polymer film 'inversely has a characteristic of extremely low % stretch rate' has a problem of bending property. Therefore, it can be caused by a pair of liquid crystal polymers. A polyester resin such as butyl phthalate, polyethylene terephthalate or polyethylene naphthalate improves the stretchability of the film and makes the flexibility good. In the invention, the polyester resin (other than the polyester resin layer t 糸 is not more than 75 to 95 parts by mass relative to the liquid crystal polymer (preferably, the liquid crystal polymer is preferably 5 to 90 parts by mass). , containing 25 parts by mass (preferably 1 〇 liquid crystal polymer is 々k ^ (9) quality). Also, the vinegar resin and liquid crystal; + using any method. Β) Thermoplastic elastomeric elastic II I) Zhongyou above-mentioned poly resin composition' Preferably, the resin dispersion containing the thermoplastic resin (A) as a continuous layer and the thermoplastic elastomer (8) as a dispersed phase is contained in the present invention. In the present invention, the content of the plastic elastomer (8) is It is preferably 15 parts by mass or less based on 1 part by mass of the polyester resin, and the lower limit is not particularly limited, and the amount of the kernel is usually 4 parts by mass or more. The content of the thermoplastic elastomer (8) is preferably 4 to 13 parts by mass based on 1 part by mass of the polyester resin (A). If η is too much thermoplastic elastomer, the heat resistance will be slightly lowered and low. The reason for this is presumed to be that the heat resistance of the elastomer component is lower than that of the polyester resin other than the liquid crystal polymer or the liquid crystal polymer. Further, the above-mentioned resin dispersion 'is preferably a chemical reaction in a process of melt-kneading with a thermoplastic elastomer (Β) by a polyester resin containing a liquid crystal polymer, and the (Β) component is uniform. The resin dispersion is finely dispersed in the (Α) component and the (Α) component is used as the continuous phase '(Β) component as the dispersed phase. In a preferred embodiment of the present invention, the thermoplastic elastomer is used as a functional group reactive with the polyester resin, and contains a substituent selected from the group consisting of an epoxy group, an oxazolyl group, an amino group, and a maleic anhydride residue. A group of resins of the group 15 201005762. In the middle, it is preferable to contain an epoxy group. The resin (BD preferably has 0.05 to 30 parts by mass of the monomer component containing the functional group in the same molecule, more preferably 2 parts by mass. If the amount of the monomer component containing the functional group is too small, it is difficult Further, when the amount of the monomer component containing the functional group is too large, the amount of the monomer component containing the functional group on the right side is excessively reacted with the polysulfonium tree (A), and gelation is likely to occur, which is not preferable. It is preferable that the eucalyptus (B-1) is a copolymer composed of an olefin component and a compound component containing an epoxy group, and at least one component or more of an acrylic component or an ethylene compound/knife may be used. a copolymer composed of an olefin component and a compound component containing an epoxy group. The functional group having the above reactivity of the resin (B-1) reacts substantially all of the groups in the insulated wire. Representative examples of B-1) include ethylene/glycidyl methacrylate S曰 copolymer, ethylene/glycidyl methacrylate/methyl acrylate terpolymer, ethylene/glycidyl methacrylate/ Vinyl acetate 3 yuan ❹ copolymerization Ethylene/methyl methacrylate glycidyl ester/methyl acrylate/vinyl acetate 4 το copolymer, etc. Among them, ethylene/glycidyl methacrylate copolymer, ethylene/glycidyl methacrylate/ Methyl methacrylate ternary copolymer. For example, b〇ndfast (product name by Sumitomo Chemical Co., Ltd.) and l〇tader (product name of Atofina Co., Ltd.) can be exemplified as the commercially available resin. It may be any one of a block copolymer, a graft copolymer, a random copolymer, and an alternating copolymer. The resin (B·) may be a random copolymer such as ethylene/propylene/diene, ethylene. /Diene/ethylene block copolymer, propylene/monoolefin/acrylic copolymer, styrene/diene/ethylene sulphide copolymerization 201005762, styrene/diisopropyl/acrylic a segmented copolymer, a styrene/diene/stupid block copolymer, which is obtained by epoxidizing a part of a dilute component, or a ring of glycerol methacrylate containing a ring of bismuth & And other difficult compounds are modified by grafting. Moreover, these copolymers are used to enhance their tolerance. In other preferred embodiments of the present invention, in the case of a thermoplastic elastomer (Β), a core-shell polymer (Β_2) is used. It has a rubbery core obtained from a mixture of acrylate or methacrylate or a mixture thereof, and an outer side shell composed of a vinyl homopolymer or a copolymer. The core-shell polymer resin used in the present invention (Β_2) And means a rubbery core (preferably a rubbery core composed of an alkyl acrylate polymer) obtained from a mixture of acrylate or methacrylate or the like, and an outer side of the ethylene polymer or copolymer a core-shell polymer of a shell (preferably, an outer side shell composed of an alkyl methacrylate polymer). In the core-shell polymer resin (Β-2) used in the present invention, the core is made of carbon. The hexaalkyl acrylate vinegar is polymerized to have a Tg of less than about 1 ° C. Further, it is preferably a crosslinkable monomer and/or grafted relative to the above alkyl acrylate. A monomeric acrylic rubber core is used. The above-mentioned alkyl acrylate is n-butyl acrylate. The above crosslinkable monomer 'is a polyethylenically unsaturated monomer having a plurality of addition polymerization reactive groups which are substantially polymerized at the same reaction rate. Among the crosslinkable monomers which can be preferably used in the present invention, there are poly(acrylic acid esters) of polyhydric alcohols such as dibutyl acrylate and dimercapto acrylate, trimethylolpropane trimethacrylate, and poly(A). Acrylate), 2- and 3-vinyl stupid, acrylic acid, and ethyl methacrylate. Better crosslinkability 17 201005762 The monomer is butylene diacrylate. The grafting monomer has at least one reactive group, and at least i 4 solid other than the reactive group, and a plurality of addition polymerizable reactive groups which are polymerized at substantially different polymerization rates. More than one ethylenically unsaturated monomer. The function of the monomer for grafting, particularly in the polymerization stage of the latter, is in the elastomer phase, i.e., the unsaturated particles remain on or near the surface of the elastomer particles (rubbery core). Therefore, if a rigid ruthenium plastic shell layer (hereinafter, simply referred to as a shell layer or a final stage) is polymerized on the surface of the elastomer (rubbery core), the residual material of the grafting monomer is retained. The reactive group which is unsaturatedly addition-polymerizable participates in the shell formation reaction, and as a result, at least a part of the shell layer is chemically attached to the surface of the elastomer. The grafting monomer preferably used in the present invention may, for example, be acrylic acid acryl vinegar, propylene methacrylate, dipropylene maleate, dimercaptoic acid dipropylene vinegar or itaconic acid dipropylene vinegar The ethylenically unsaturated dibasic acrylonitrile, which is an acidic maleic acid propylene vinegar, an acidic fumaric acid acryl vinegar, and an acidic itaconic acid propylene sulphate, has a calcined monomer. A special single-system propylene acrylate Ss and dipropylene maleate. The monomer for forming an outer side shell (hereinafter, simply referred to as a monomer for the outermost layer) used in the present invention is a monomer which can form an ethylene homopolymer or a copolymerized second, and is used as a monomer for the final stage. Specific examples thereof include a methacrylate, acrylonitrile, a propionate vinegar, a methyl acetophenone acetophenone or the like. The above-mentioned final stage monomer may be a mixed system of single ι. The above final stage uses a monomer, preferably

The methyl group (tetra) (tetra) having a carbon number of 1 to 16 is preferably an alkyl methacrylate having a carbon number of W 18 201005762. The method for producing the core-shell polymer resin (B_2) is not particularly limited, but an emulsion polymerization method is preferred. An example of the core-shell polymer (B-2) which is preferably used in the present invention is as follows: butyl acrylate and butyl diacetate as a crosslinking agent, and methyl group as a grafting agent. The first stage in which the single system consisting of propylene acrylate or propylene maleate is polymerized, that is, the rubbery core, and the final segment of the methyl methacrylate polymer, that is, the shell. Further, it may be one having at least one type selected from the group consisting of an epoxy group, an oxazolyl group, an amino group, and a maleic anhydride group on the surface of the shell® for improving the dispersibility in the polyester resin. base. As described above, 'the commercial products of the two-stage core-shell polymer may be PARALOID EXL-2313, EXL-23 14 and EXL-2315 (both trade names) manufactured by Wu Yu Chemical Industry Co., Ltd. However, the invention is not limited thereto. Further, in other preferred embodiments, as the thermoplastic elastomer (B), a vinyl copolymer (B_3) in which a metal salt of a carboxylic acid or a carboxylic acid is bonded to a side chain of polyethylene is used. ). This ethylene-based copolymer has an action of suppressing crystallization of the above polyester resin. Examples of the acid to be bonded include an unsaturated monocarboxylic acid such as acrylic acid, mercaptoacrylic acid or crotonic acid, or an unsaturated dicarboxylic acid such as maleic acid, fumaric acid or stearic acid. Further, examples of the metal salt include salts of Zn, Na, K, and Mg. As such a vinyl-based copolymer, for example, a part of a carboxylic acid of an ethylene-methacrylic acid copolymer is referred to as a metal ion as a resin of a polyionic polymer (ionomer) (for example, Hemi 19 201005762 Lan (Hhnilan) ); trade name, manufactured by Mitsui Chemicals Co., Ltd.), ethylene-acrylic acid copolymer (for example, EAA; trade name, manufactured by Daow Chemical Co., Ltd.), and vinyl-based graft polymer in the side bond (for example, Admer; trade name, manufactured by Mitsui Petrochemical Co., Ltd.). Other heat resistant resins, generally used additives, inorganic fillers, processing aids, colorants, and the like may be added to the insulating layer of the present invention within the range not impairing the characteristics required by the present invention.

As the conductor used in the present invention, a bare metal wire (single wire), an insulated wire provided with an enamel coating layer or a thin-walled insulating layer on a bare metal wire, or a plurality of bare metal wires or a plurality of enamel bags may be used. The number of twisted wires of these stranded wires of insulated wires or thin-wall insulated wires can be arbitrarily selected according to high-frequency use. Moreover, when the number of cores (metal wires) is large (for example, i9-, 37-metal wires), it may not be a twisted wire. When it is not a twisted wire, for example, only a plurality of metal wires may be bundled substantially in parallel, or the bundles may be plied at a very large pitch. In either case, it is preferred to make the cross section a slightly circular shape.

In the case of the insulated electric wire of the present invention, in the case of having three insulating layers, the insulating layer of the second layer of the desired thickness can be pressed by the usual method on the periphery of the conductor. The outer layer of the insulating layer of the layer is extruded to cover the insulating layer of the second layer of the desired layer, and the insulating layer is blanket-coated to form the insulating layer. The overall thickness of the extruded insulating layer thus formed is preferably such that three layers are formed in the range of 60 to 18 Å. If the overall thickness of the insulating layer is too thin, the electrical properties of the obtained heat-resistant multilayer insulated wire may be greatly reduced, and there may be cases where it is not suitable for practical use; otherwise, if the overall thickness of the insulating layer is too thick, there will be It is difficult to perform coil processing, etc., and does not have a degree of miniaturization of 20 201005762, and a better range is 70 to 50 μm. Further, it is preferable that each of the three layers has a thickness of 20 to 60 μm. The single-layer insulated electric wire has an insulating layer composed of the polystyrene structural composition of the present invention. Further, it is preferable that all of the insulating layers of the two layers & three or more layers are composed of the polyester resin composition of the present invention. The insulated electric wire of the present invention is excellent in weldability required for use as a coil in addition to the degree of heat resistance, so that it can be easily processed after the winding process. 1 So far, there is no insulated wire that can maintain heat resistance to heat F and has good weldability. According to the present invention, the beryllium wire can be directly welded at the end of the processing, and the wire workability can be sufficiently improved. Further, by using a plurality of insulated electric wires of the present invention, it is possible to provide excellent electrical characteristics and high reliability. [Embodiment] Next, the present invention will be further described in detail based on the actual example, but the present invention is not limited thereto. The resin composition forming the insulating layer is obtained by melt-mixing a material of a predetermined blending composition by a biaxial extruder for kneading, water-cooling, and cutting with a granulator (4). The resin composition of the obtained (four) example was molded into a mold shape, and the state thereof was confirmed by a transmission electron microscope. As a result, it was confirmed that the examples and the examples 10' other than the embodiment 9 in which the thermoplastic elastomer was not blended were The polyacetal resin is a continuous dispersion of the resin dispersion in which the thermoplastic elastomer is a dispersed phase. Examples 1 to 10 and Comparative Examples 1 to 3 21 201005762 A soft copper wire having a wire diameter of 0.75 mm was prepared as a conductor. According to Table i, the composition of the resin for coating is applied according to Table i (the numerical value of the composition represents the mass part) and the thickness. In the case of a single layer, the layer is coated, and in the case of a plurality of layers, the coating is sequentially extruded on the conductor to make the insulation. wire.

For the obtained insulated wires, various characteristics were tested in the following manners. Further, the appearance was observed by the naked eye. If no abnormality such as cracks or crazing was found in the film (indicated by 〇 in Table j), it was found that the abnormality was unacceptable (X). A · Flexibility is tightly wrapped around the wire itself so that the wire can be in contact with the wire, and it is observed by a microscope. If no abnormalities such as cracks or cracks are found in the film, the abnormality is acceptable (indicated by 0 in Table 1) And found that these abnormalities are not B. Electrical heat resistance, the insulated wire length of about 50cm is folded into two, and while applying a tension of 5kg, the portion having a length of about 12cm is twisted nine times and then the tension is removed. The traces were cut open to make a flexible specimen. After the flexural sample was heated at 355 C for 168 hours, the dielectric breakdown voltage was measured with respect to the dielectric breakdown voltage before heating. If the residual rate was 40% or more, it was judged that the F type was acceptable (Table 1 is shown as 0). If the residual rate is not $4〇%, it is judged as not: the lattice () and especially the residual rate is 50°/. The above heat resistance is particularly good, and it is represented by ◎. C. Solvent resistance: 20D winding is used as the wire for winding, and it is immersed in ethanol 22 201005762 or isopropanol solvent for 30 seconds. The surface of the sample after drying is observed to determine whether there is crack or not. The fine crack is expressed as good (9), and the fine crack is expressed as bad (χ) β D. The weldability is used to evaluate the tangency of the winding process and the workability correlation _ » (4) (4) Pressure coating After the insulated wire was immersed, the front end portion of 40 mm was placed in the solder bath at 45 (TCxln ρ; flask 乂 450010 seconds).

Where the solder is 30mm or more, it is judged as a person's. If it is 30mm, it is judged as unqualified.

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igltglNCI 3 in hiding one% ®? ε City 1 201005762 In Table 1, "" means no addition. Also, the pass/fail ◎ indicates that it is particularly good, and 〇 indicates that good χ indicates inappropriate. Further, each of the resins indicated by the ellipses in the table is as follows. PET: polyethylene terephthalate resin, Teijin pET (manufactured by Teijin Co., Ltd.); Ethylene copolymer ♦ multi-ionic polymer resin, Hai Milan 1855 (manufactured by Mitsui DuPont Co., Ltd., trade name); One-shell copolymer: a core-shell copolymer having a rubbery core derived from an acrylic resin and an ethylene-based homopolymer, and a Paraloid EXL23 13 (manufactured by Wu Yu Chemical Industry Co., Ltd.) LCP: liquid crystal polymer, Rhodes LC5000 (manufactured by UNITIKA, trade name), PES: polyethersulfone resin, smikaku yue pES41 〇〇 (manufactured by Sumitomo Chemical Industries, Ltd., trade name); _ Ny66: resistant Polyamide 66, FDK-1 (manufactured by UNITIKA Co., Ltd., trade name); and 'the first layer, the second layer, and the third layer are sequentially coated from the conductor, and the third layer is the outermost layer when the structure is a three-layer structure. From the results shown in Table 1, the following can be understood. That is, in Comparative Example 1 which does not contain LCP and uses only three layers of wires of pes in the insulating layer, its solvent resistance and weldability are not good. In Comparative Example 2, which does not contain LCP and uses PET/polyionic polymer and nylon 66 in the insulating layer, its electrical heat resistance is not good. Further, in Comparative Example 3 in which the LCP was excessive, the flexibility was poor. 25 201005762 In contrast, any of Examples 1 to 9 is excellent in flexibility, electrical heat resistance, and solvent resistance, regardless of the appearance. In addition, Example 1 of the insulated electric wire covered with the polyester resin composition containing 17 parts by mass of the thermoplastic elastomer (B) per 100 parts by mass of the polyester resin (A) is compared with the Example Although 1 to 9 has poor heat resistance, it can be fully used as a p-type qualified product. Industrial Applicability The insulated electric wire of the present invention can be applied to an insulated electric wire having at least one insulating layer, and is preferably an insulated electric wire having three or more insulating layers. While the present invention has been described in connection with the embodiments, the present invention is not limited to the details of the invention, and is not limited to the details of the invention as set forth in the appended claims. Explain in part. [Simple description of the diagram] ® i is a cross-sectional view of a three-layer insulated voltage device with its component wound. Fig. 2 is a cross-sectional view showing an example of a conventional structural change. [Main component symbol description] 1 Ferrite core 2 Coil holder 3 Insulation protection layer 4 Primary winding 26 201005762 4a Conductor Insulation 4b, 4c, 4d 5 Insulation tape 6 Secondary winding 6a Conductor Insulation 6b, 6c, 6d

27

Claims (1)

201005762 X. Patent application scope: 1. An insulated wire', a conductor having a conductor and at least one layer covering the conductor, characterized in that it is a resin composition constituting at least one layer of the insulating layer A polyester resin composition comprising a polyester resin (A) containing a liquid crystal polymer 75 mass of 75 to 95 parts by mass of the polyester resin other than the liquid crystal polymer is used. 2. The insulated wire of claim 1, wherein the polyester resin composition comprises a thermoplastic elastomer (B), and the polyester resin (4) is a continuous layer. The thermoplastic elastomer (8) is a resin dispersion of a dispersed phase. 3. The insulated electric wire according to the second aspect of the invention, wherein the polyacetal resin composition is contained in an amount of 15 parts by mass or less based on the (4)-based resin (4) UK) and contains at least 15 parts by mass of the thermoplastic elastomer (B). 4. The insulated wire of claim 2 or 3, wherein the plasticity (4) body (8) is at least 1 selected from the group consisting of an epoxy group, a base group, an amino group, and an acid liver residue. A type of functional resin (B-1). 5. If you want to insulate the wire of item 2 or 3 of the patent scope, stand up, the thermoplastic elastomer (or you or stupid " human & Xiao has acrylate or methacrylate or its superior The rubber-like core obtained by the mixture is a core-shell polymer (B_2) of the outer side shell formed by the private-mesh, 屯u-derived homopolymer or co-t-form. 6·If the patent scope 2 or 3 heat A plastic elastomer (Β) wire, wherein a) is used in a vinyl copolymer (B-3) having a metal salt of a carboxylic acid or a carboxylic acid 28 201005762 in a side chain. XI. Schema: As the next page. 29