KR100949031B1 - Polymer composition for electronic device cables and cable comprising insulation layer therefrom - Google Patents

Abstract

The present invention relates to a polymer composition for an electric wire and an electric wire comprising the same as an insulator. The polymer composition for electronic device electric wires of this invention is ethylene-vinyl acetate copolymer resin containing 28-33 weight% of vinyl acetate; A basic resin obtained by blending a polyolefin resin and a styrene-ethylene-butylene-styrene copolymer resin having a polar group introduced therein or a polyolefin resin and a ethylene-propylene-diene monomer copolymer resin having a polar group introduced therein; Surface treated inorganic flame retardants; Flame retardant aids; And crosslinking aids. According to the present invention, there is an excellent flame retardancy without using a halogen flame retardant, and has the advantage of excellent appearance by imparting flexibility and elasticity to the wire.

Electronic wire, insulator, styrene copolymer, antimony, non halogen

Description

Polymer composition for electronic device cables and cable comprising insulation layer therefrom}

The present invention relates to a polymer composition for electric wire and an electric wire comprising the same as an insulator, and more particularly, by blending a styrene copolymer into a base resin and using an antimony flame retardant aid, excellent flame retardancy without using a halogen flame retardant. The present invention relates to a polymer composition for an electronic device wire having excellent appearance by providing flexibility and elasticity to an electric wire and an electric wire including the same as an insulator.

Research has been conducted on the production of non-halogen wires having high flame retardancy and high temperature high elasticity by replacing the conventional polyvinyl chloride base resins and halogen flame retardants by piggybacking on non-halogenation of electric wires or cable sheaths. Accordingly, research on the production of a non-halogen wire using mainly ethylene-vinyl acetate having excellent flame retardancy as a basic resin and using a metal hydroxide or a phosphorus compound as the main flame retardant has been conducted.

In particular, for these non-halogen wires, the grades used for special purposes must have elasticity at high temperatures and at the same time the wire vertical of Underwriters Laboratories (UL), recognized by the US government agency Occupational Safety and Health Administration (OSHA) as a safety assessment standard. There is a technical problem to meet the VW-1 test grade or higher in the vertical wire flame test. In general, when the non-halogen flame retardant is used instead of the halogen flame retardant for the VW-1 grade flame retardant, a relatively large amount of non-halogen flame retardant should be used. Accordingly, the mechanical properties and elongation of the insulator are deteriorated, and the flame retardant properties are significantly reduced when the insulator is crosslinked through electron beam irradiation crosslinking to maintain elasticity at a high temperature.

In the related art, a method for a composition having VW-1 class flame retardancy and elasticity at high temperature using a halogen flame retardant and a method for a composition having VW-1 class flame retardance using a non-halogen flame retardant have been proposed. However, these conventional methods have the above-mentioned non-halogen composition and have the problem of not having both VW-1 class flame retardancy and elasticity at high temperature.

Accordingly, efforts to solve the above-mentioned problems of the prior art have been continued in the related art, and the present invention has been devised under such a technical background.

The technical problem to be achieved by the present invention is to have excellent flame retardancy without using a halogen flame retardant, to provide flexibility and elasticity to the wire to satisfy the cut-through characteristics, and at the same time to improve the appearance, such technical It is an object of the present invention to provide a polymer composition for an electronic device wire and an electric wire comprising the same as an insulator capable of achieving the problem.

In order to achieve the technical problem to be achieved by the present invention, the polymer composition for an electric wire may include 50 to 98 parts by weight of an ethylene-vinyl acetate copolymer resin containing 28 to 33% by weight of vinyl acetate; and a polyolefin resin having a polar group introduced therein. 100 parts by weight of the base resin blended from 20 parts by weight to 1 to 30 parts by weight of the styrene-ethylene-butylene-styrene copolymer resin; 100 to 200 parts by weight of the surface-treated inorganic flame retardant; 60 to 150 parts by weight of a flame retardant aid; And 1 to 10 parts by weight of the crosslinking aid.

In order to achieve the technical problem to be achieved by the present invention, the polymer composition for an electric wire may include 50 to 98 parts by weight of an ethylene-vinyl acetate copolymer resin containing 28 to 33% by weight of vinyl acetate; and a polyolefin resin having a polar group introduced therein. 100 parts by weight of a basic resin blending from 20 parts by weight to 1 to 30 parts by weight of an ethylene-propylene-diene monomer; 100 to 200 parts by weight of the surface-treated inorganic flame retardant; 60 to 150 parts by weight of a flame retardant aid; And 1 to 10 parts by weight of the crosslinking aid.

An electronic device wire for achieving the technical problem to be achieved by the present invention, characterized in that it comprises the polymer composition for electronic device wire as an insulator, in particular cut-through characteristics for measuring the elasticity at high temperature It is characterized by having.

The polymer composition for electric wires according to the present invention has excellent flame retardancy without using a halogen flame retardant, and has excellent appearance by imparting flexibility and elasticity to the electric wire.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

The present invention uses a surface-treated inorganic flame retardant in order to solve the problem that the processing characteristics are deteriorated due to the use of inorganic flame retardant without the use of halogen flame retardant according to the eco-friendly trend, the problem of lack of flexibility of the wire by the addition of a large amount of inorganic flame retardant In order to solve the present invention relates to a polymer composition for electric wires in which styrene-ethylene-butylene-styrene copolymer having high flexibility and high elasticity is blended with a basic resin.

The polymer composition for an electric wire of the present invention comprises 50 to 98 parts by weight of ethylene-vinyl acetate copolymer resin containing 28 to 33% by weight of vinyl acetate; and 1 to 20 parts by weight of a polyolefin resin having a polar group and styrene-ethylene- 1 to 30 parts by weight of a butylene-styrene copolymer resin or 100 parts by weight of a base resin blended from 1 to 30 parts by weight of an ethylene-propylene-diene monomer; 100 to 200 parts by weight of the surface-treated inorganic flame retardant; 60 to 150 parts by weight of a flame retardant aid; And 1 to 10 parts by weight of the crosslinking aid.

The base resin is a blend of ethylene-vinyl acetate copolymer resin containing 28 to 33% by weight of vinyl acetate, polyethylene and styrene-ethylene-butylene-styrene copolymer resin into which a polar group is introduced, or 28 to 33 weight of vinyl acetate. Blends of an ethylene-vinyl acetate copolymer resin containing in%, a polyolefin resin having a polar group introduced therein, and an ethylene-propylene-diene monomer copolymer resin can be used.

It is preferable that the said ethylene-vinyl acetate copolymer resin contains vinyl acetate at 28-33 weight% and 50-98 weight%. In the content limit of the vinyl acetate in the ethylene-vinyl acetate copolymer resin, if it is less than the lower limit, it is not preferable for the flame retardant property, and if it exceeds the upper limit, the mechanical property is lowered, which is not preferable.

The ethylene-vinyl acetate copolymer resin preferably has a melt flow index of 0.1 to 1.0. Within the range of the melt flow index, when it is less than the lower limit, it is not preferable for containing a large amount of flame retardant, and when it exceeds the upper limit, mechanical properties are lowered, which is not preferable.

The styrene-ethylene-butylene-styrene copolymer resin and the ethylene-propylene-diene monomer copolymer resin have high flexibility and high elasticity and are used by blending with a basic resin to provide flexibility and elasticity to an electric wire to which the polymer composition of the present invention is applied as an insulator. It gives a function and improves an external appearance. As the styrene-ethylene-butylene-styrene copolymer resin suitable for use in the basic resin of the present invention, styrene-ethylene-butylene-styrene copolymer resins commonly used in this field may be used, but the ratio of styrene is 30 to 30 by weight. It is preferable that it is about 70%, and it is more preferable if the melt flow index of resin is 3.0 or less.

Examples of diene molecules that may be used in the ethylene-propylene-diene copolymer resin include 5-ethylidene-2-norbornene, 1,4-hexadiene, Dicyclopentadiene and the like. In this case, the composition of ethylene-propylene-diene is preferably 45 to 75% by weight of ethylene. When the content of ethylene is 45% by weight or less, the strength of the wire insulator may be reduced, and the filler of inorganic filler may be poor. Falls out. When ethylene is included in excess of 75% by weight, the crystallinity is increased, thereby lowering the low temperature characteristics of the insulator. Of the remaining propylene and dienes, dienes make up about 25 to 55% by weight.

The styrene-ethylene-butylene-styrene copolymer resin and the ethylene-propylene-diene monomer copolymer resin may be blended together with an ethylene-vinyl acetate copolymer resin and a polyolefin resin having a polar group introduced therein to be used as a base resin.

When the styrene-ethylene-butylene-styrene copolymer resin and the ethylene-propylene-diene monomer copolymer resin are blended together with the ethylene-vinyl acetate copolymer resin and the polyethylene resin into which the polar group is introduced, it is included in an amount of 1 to 30% by weight. desirable. In the content limitation of the styrene-ethylene-butylene-styrene copolymer resin and the ethylene-propylene-diene monomer copolymer resin, when the content is less than the lower limit, the flexibility and elasticity of the electric wire are not low, and when the content exceeds the upper limit, mechanical It is unpreferable because a characteristic falls.

The polyolefin resin having the polar group introduced therein may be a polyethylene, an ethylene-vinyl acetate copolymer, an ethylene ethyl acrylate copolymer or the like having maleic anhydride, glycidyl methacrylate or a mixture thereof. The ratio of introducing the polar functional group is preferably grafted in an amount of 0.1 to 10% by weight of the weight of the polymer resin to polarize the amount of the polar functional monomer in terms of compatibility with the inorganic filler and thermal stability of the composition. If the amount of the polar functional group is less than 0.1% by weight, the effect of improving compatibility with the inorganic filler is insignificant, and if it exceeds 10% by weight, the thermal stability of the composition is lowered.

The polar group introduced polyolefin resin is preferably included in 1 to 20% by weight. In the content limitation of the polyolefin resin into which the polar group is introduced, if less than the lower limit, compatibility with a large amount of non-halogen flame retardant is not preferable, and if it exceeds the upper limit, mechanical properties are lowered and not preferable.

The present invention can prepare a polymer composition for the final electronic wire by mixing the inorganic flame retardant, flame retardant auxiliary and processing aid surface-treated in the base resin as described above.

The surface-treated inorganic flame retardant is used to improve processing characteristics, for example, may be used magnesium hydroxide or aluminum hydroxide surface-treated with vinylsilane, fatty acid, aminopolysiloxane or other polymers.

The surface-treated inorganic flame retardant is preferably included in 100 to 200 parts by weight based on 100 parts by weight of the base resin. In the content limitation of the inorganic flame retardant, if less than the lower limit, the flame retardancy is not preferable, and if it exceeds the upper limit, the mechanical properties are lowered, which is not preferable.

The flame retardant aids are used to compensate for the mechanical and elongation deterioration problems and to maximize the flame retardant properties.

As the flame retardant auxiliary agent, an antimony-based compound is preferably used. For example, antimony trioxide, antimony pentoxide, or the like may be used.

The flame retardant auxiliary agent is preferably included from 60 to 150 parts by weight based on 100 parts by weight of the base resin. In the content limitation of the flame retardant aid, if the lower limit than the lower limit, the flame retardancy is not preferable, and if the upper limit is exceeded, the mechanical and high temperature elastic properties are lowered, which is not preferable.

The crosslinking aid may be an acrylate, cyanurate, or the like, and in particular, it is preferable to use a cyanurate.

The crosslinking aid is preferably included 1 to 10 parts by weight based on 100 parts by weight of the base resin. In the content limiting of the crosslinking aid, when the amount is less than the lower limit, the amount of crosslinking is small and mechanical properties are lowered, and when the upper limit is exceeded, elongation is lowered and flexibility is not preferable.

The polymer composition for an electronic device wire of the present invention comprising the above components may further include additives such as antioxidants, lubricants, processing aids, etc. in addition to the above components.

The antioxidants, lubricants and processing aids may be used conventional ingredients used in the art.

The antioxidant and the lubricant may be included in an amount of 1 to 5 parts by weight based on 100 parts by weight of the base resin, and the processing aid may be included in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the base resin.

The polymer composition for an electronic device wire of the present invention can be crosslinked through electron beam irradiation by using a mixture of the above components. The crosslinking may irradiate and crosslink the electron beam with an irradiation amount of 10 to 30 Mrad to impart mechanical properties and high temperature elasticity of the insulator. In the said electron beam irradiation amount limitation, when it is less than the said lower limit, It is unpreferable because high temperature elastic property falls, and when it exceeds the said upper limit, elongation falls and it is unpreferable.

In addition, the present invention provides an electronic device wire including the polymer composition for an electronic device wire as an insulator, which will be described with reference to FIG. 1.

1 is a cross-sectional view showing a wire for an electronic device in which the polymer composition for an electronic device wire according to an embodiment of the present invention is applied to an insulator. As shown in FIG. 1, the electronic device wire 10 to which the polymer composition for an electronic device wire according to an embodiment of the present invention is applied to an insulator includes an insulator (11) and an inner wrapper (11). It is a spherical conductor made of 13).

The conductor 11 may be used, such as ordinary copper, tin-plated copper, the thickness can be appropriately adjusted as necessary.

The insulator 13 is formed of the polymer composition for an electronic device wire of the present invention, and may be formed on the surface of the conductor 11 by kneading the polymer composition to produce pellets and then using an extruder. The insulator 13 may wrap the surface of the conductor 11 to a thickness of 0.43 to 0.68 mm.

Hereinafter, in order to help the understanding of the present invention will be described in more detail through preferred examples and comparative examples.

Example  One

Table 1 is based on the blend of polyethylene and ethylene-propylene-diene terpolymer with ethylene-vinyl acetate copolymer resin and maleic anhydride introduced with a vinyl acetate content of 33% and a melt flow index of 0.2%. It was used as a resin. Magnesium hydroxide and antimony trioxide, inorganic flame retardants, were kneaded for 30 minutes in a 3 l kneader at a temperature of 160 ± 10 ° C. using 120 and 100 parts by weight based on 100 parts by weight of the base resin, respectively, The wire of UL 3239 standard of the structure was manufactured. In this case, the conductor was about 0.6 mm thick, the cable insulation material surrounding the conductor was about 0.5 mm thick, and the total wire thickness was about 1.60 mm. Prepared by adjusting to 25 Mrad.

Example  2 to 3

A blend of polyethylene and styrene-ethylene-butylene-styrene copolymers containing ethylene-vinyl acetate copolymer resin having a melt flow index of 0.2% and a melt flow index of 0.2% with a component and composition as shown in Table 1 below. Except that was used as the base resin was carried out in the same manner as in Example 1.

Comparative example  One

A blend of an ethylene-vinyl acetate copolymer resin having a melt flow index of 0.2% and a polyethylene and styrene-ethylene-butylene-styrene copolymer resin having a melt flow index of 0.2% and a maleic anhydride introduced therein as components and compositions shown in Table 1 below. In the same manner as in Example 1, except that it was used as the base resin, and magnesium hydroxide as the inorganic flame retardant and melamine cyanurate as the flame retardant aid were used based on 120 and 100 parts by weight based on 100 parts by weight of the base resin, respectively. Was carried out.

Comparative example  2

A blend of an ethylene-vinyl acetate copolymer resin having a melt flow index of 0.2% and a polyethylene and styrene-ethylene-butylene-styrene copolymer resin having a melt flow index of 0.2% and a maleic anhydride introduced therein as components and compositions shown in Table 1 below. In the same manner as in Example 1, except that it was used as a base resin, and magnesium hydroxide as an inorganic flame retardant, and talc as a flame retardant aid were used based on 120 and 100 parts by weight based on 100 parts by weight of the base resin, respectively. Was carried out.

Comparative example  3

A blend of polyethylene and styrene-ethylene-butylene-styrene copolymers having ethylene-vinyl acetate copolymer resin and maleic anhydride introduced with a vinyl acetate content of 33% and a melt flow index of 0.2 with components and compositions shown in Table 1 below. Is used as the base resin, except that magnesium hydroxide is used as the inorganic flame retardant, and the content of ammonium polyphosphate, an organic flame retardant aid, is 120 and 100 parts by weight based on 100 parts by weight of the base resin, respectively. It carried out by the same method as Example 1.

Comparative example  4

Except for using a blend of polyethylene resin having a vinyl acetate content of 33% and a melt flow index of 0.2% and a maleic anhydride introduced therein as a base resin in the components and compositions shown in Table 1 as the base resin. It carried out by the same method as Example 1.

Comparative example  5

In the same manner as in Examples 2 to 3 with the components and compositions shown in Table 1 below.

Comparative example  6

To the same components and compositions as in Table 1 was carried out in the same manner as in Example 1. The unit in Table 1 is parts by weight.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Resin 60 60 50 60 60 60 70 45 45 Resin b 20 20 20 20 20 20 30 20 20 Resin - 20 30 20 20 20 - 35 - Resin 20 - - - - - - - 35 Inorganic flame retardants 120 120 120 120 120 120 120 120 120 Inorganic flame retardant 100 100 100 - - - 100 100 100 Inorganic flame retardant preparation b - - - 100 - - - - - Inorganic flame retardant preparations - - - - 100 - - - - Organic flame retardant - - - - - 100 - - - Lubricant One One One One One One One One One Antioxidant One One One One One One One One One Crosslinking aid 3 3 3 3 3 3 3 3 3 Electron Beam Dose (Mrad) 25 25 25 25 25 25 25 25 25

  [Explanation of Table 1]

Resin a: Ethylene-vinyl acetate copolymer resin having 33% vinyl acetate and 0.2 melt flow index

Resin b: Polyethylene resin grafted maleic anhydride monomer to 0.9% by weight

Resin c: Styrene-ethylene-butylene-styrene copolymer resin.

Resin d: Ethylene-propylene-diene terpolymer copolymer resin. The diene used here is 5-ethylidene-2-norbornene, and the ratio of ethylene: propylene: diene is 70: 20: 5 by weight.

Inorganic flame retardant: Magnesium hydroxide, surface-treated with silane polymer

Inorganic flame retardant a: antimony trioxide

Inorganic flame retardant b: melamine cyanurate

Inorganic flame retardant aid c: Talc

Organic flame retardant aid: ammonium polyphosphate

Lubricant: Stearic Acid

Antioxidant: tetrakis (3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate pentaerythritol (pentaerythritol Tetrakis (3- (3,5-di-tert-butyl-4-hydroxyphenyl) Propionate).

Crosslinking aid: Triallyl Isocyanurate

The UL 3239 wire samples prepared in Examples 1 to 3 and Comparative Examples 1 to 6 were measured at room temperature tensile strength and elongation, VW-1 flame retardant, heat deformation and appearance, and the results are shown in Table 2 below. Shown in

end. Tensile strength and elongation at room temperature-Tensile strength and elongation were measured according to UL 758 standard. At this time, the tensile strength should be more than 1.05 kg / mm2 and the elongation should be more than 150%.

I. VW-1 flame retardant-VW-1 flame retardant tested according to UL 1581. The following characteristics must be satisfied.

① After applying flame for 15 seconds, the experiment to be extinguished within 60 seconds must pass 5 times.

② Do not burn the indicator tape on the top.

③ Do not burn cotton wool on the floor due to foreign substances that are generated during falling.

All. Heating deformation for measuring high temperature elasticity-For measuring high temperature elasticity, place the wire in the diameter direction of the wire using stainless jig having a thickness of 0.8 mm in a constant temperature chamber at 105 ℃, put it up for 1 hour with a force of 0.9 kg, and take it out. When measuring the deflection relative to the diameter of the initial wire, the measured heat deflection should not exceed 25%. In addition, the conductor shall not be exposed by the stainless jig.

la. Appearance-The cable must have a smooth and elastic appearance when extruding.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Tensile Strength (kg / mm²) 1.09 1.23 1.10 0.90 1.13 1.03 1.34 1.01 1.04 Elongation (%) 170 176 168 95 145 130 98 140 125 VW-1 flame retardant (UL 1581) pass pass pass fail fail fail fail pass pass Heat deformation (%) 14 17 12 19 18 17 10 9 5 Exterior pass pass pass pass pass fail pass pass pass Final judgment pass pass pass fail fail fail fail fail fail

As shown in Table 2, the wires of Examples 1 to 3 according to the present invention was found to exceed the required value of UL 3239 wire of 1.05, the elongation is also measured by peeling the inner conductor portion at room temperature to measure the tensile strength Similarly, it was confirmed that the value was maintained above 150%. In particular, a stable extinguishing phenomenon could be confirmed by the gas formed during combustion. Heat deformation test in a constant temperature chamber at 105 ℃ was confirmed that less than 20% of deformation occurs after 1 hour, it was confirmed that the manufactured wire is maintained at high temperature elasticity. In addition, it was confirmed that the appearance is excellent.

On the other hand, in the case of Comparative Example 1, the tensile strength and elongation were significantly lower than the required value, it was confirmed that the flame retardancy is poor and fail the VW-1 flame retardant test. In addition, it was confirmed that the heat deformation and the appearance satisfy the required characteristics by the basic resin.

In Comparative Example 2, the tensile strength was satisfied with the required physical properties, and the elongation was also confirmed to be similar to the required value. However, it was confirmed that the VW-1 flame retardant test failed. In addition, it was confirmed that the heating deformation and appearance were satisfied with the required characteristics.

In the case of Comparative Example 3, it was confirmed that the tensile strength and the elongation rate were slightly insufficient in the required physical properties. In addition, the heat deformation satisfies the required characteristics, but the VW-1 flame retardant characteristics and appearance were found to fail.

In Comparative Example 4, the tensile strength was found to satisfy the required physical properties, but the elongation was very low. In addition, it was confirmed that the VW-1 flame retardant test also failed.

In Comparative Examples 5-6, VW-1 flame retardant properties and heat deformation tests were satisfied, but it was confirmed that the tensile strength and elongation rate failed due to lack of required physical properties.

As mentioned above, although this invention was demonstrated based on the limited number of Example and drawing, the scope of the present invention is not limited to these Example and drawing. The average person skilled in the art to which the present invention pertains can carry out the equivalent invention in which various modifications and variations are made to the present invention within the spirit of the present invention and the claims to be described below. Make sure you belong to the scope of your rights.

1 is a cross-sectional view showing a wire for an electronic device in which the polymer composition for an electronic device wire according to an embodiment of the present invention is applied to an insulator.

<Description of Major Symbols in Drawing>

10: wire 11: conductor

13: insulator

Claims (11)

50 to 98 parts by weight of ethylene-vinyl acetate copolymer resin containing 28 to 33% by weight of vinyl acetate; and 1 to 20 parts by weight of polyolefin resin having a polar group introduced therein and 1 to 30 parts by weight of styrene-ethylene-butylene-styrene copolymer resin. 100 parts by weight of the base resin blended portion; 100 to 200 parts by weight of the surface-treated inorganic flame retardant; 60 to 150 parts by weight of antimony flame retardant adjuvant; And 1 to 10 parts by weight of the crosslinking aid; polymer composition for electric wires comprising a. 50 to 98 parts by weight of ethylene-vinyl acetate copolymer resin containing 28 to 33% by weight of vinyl acetate; and 1 to 20 parts by weight of polyolefin resin having a polar group introduced therein and 1 to 30 parts by weight of ethylene-propylene-diene terpolymer copolymer resin. 100 parts by weight of the base resin blended; 100 to 200 parts by weight of the surface-treated inorganic flame retardant; 60 to 150 parts by weight of antimony flame retardant adjuvant; And 1 to 10 parts by weight of the crosslinking aid; polymer composition for electric wires comprising a. The method according to claim 1 or 2, The ethylene-vinyl acetate copolymer resin is a single or a mixture of two or more selected from the group consisting of ethylene-acetic acid, ethyl-methacrylate and ethylene-ethyl acrylate copolymer. The method of claim 2, The diene monomer of the ethylene-propylene-diene terpolymer copolymer resin is at least one material selected from the group consisting of 5-ethylidene-2-norbornene, 1,4-hexadiene and dicyclopentadiene Polymer composition for wires. The method according to claim 1 or 2, The polyolefin resin in which the polar group is introduced is selected from the group consisting of polyethylene, ethylene-vinyl acetate copolymer and ethylene ethyl acrylate copolymer having a polar group selected from the group consisting of maleic anhydride, glycidyl methacrylate and mixtures thereof. Polymer composition for electric wires, characterized in that the selected single or a mixture of two or more. The method according to claim 1 or 2, The surface-treated inorganic flame retardant is a polymer composition for electronic wires, characterized in that the magnesium hydroxide or aluminum hydroxide surface-treated with a single substance or a mixture of two or more selected from the group consisting of vinylsilane, fatty acids and aminopolysiloxane. delete The method according to claim 1 or 2, The crosslinking aid is a polymer composition for an electronic device electric wire, characterized in that a single substance or a mixture of two or more selected from the group consisting of acrylates, cyanurates and mixtures thereof. The method according to claim 1 or 2, The polymer composition for an electronic device wire, the polymer composition for an electronic device wire further comprises a single additive or two or more mixed additives selected from the group consisting of antioxidants, lubricants and processing aids. The method of claim 9, The antioxidant is contained in 1 to 5 parts by weight based on 100 parts by weight of the base resin, The lubricant is contained in 1 to 5 parts by weight based on 100 parts by weight of the base resin, The processing aid is 0.5 to 10 parts by weight based on 100 parts by weight of the base resin, the polymer composition for electric wires. An electronic device wire comprising the polymer composition for an electronic device wire according to claim 1 as an insulator.

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