JPH09139117A - Ant-proof wire/cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ant-proof wire/cable which is excellent in surface hardness, notch impact resistant property, cold resistant property, non-water absorptivity, extrusion workability, coating adhesive property, and ant-proof property, and is low in cost and industrially advantageous since a wide-use nylon is used. SOLUTION: An extruded coating layer comprizing a resin composition which is made by mixing (A) a polar functional group modified propylene polymer with (B) a polyamide resin is provided as the outermost layer sheath of a wire or a cable. This extruded coating layer comprizes a component (A) of 10 to 50wt.% and a component (B) of 90 to 50wt.%, and (A) is a modified propylene- polymer composition which is obtained by melting, kneading, and polymerizing a propylene-polymer, an aromatic vinyl monomer, and a polar functional group- containing vinyl monomer. The wire/cable wherein this composition is used as the outermost layer can be improved in ant-proof property, coating adhesive property, notch impact resistant property, extrusion workability, cold resistant property, and non-water absorptivity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a termite-proof electric wire / cable which is provided with an extruded coating layer made of a specific resin composition as an outermost layer sheath and has excellent termite-proof property.

[0002]

2. Description of the Related Art Electric wires for control, electric power, communication, etc., which are buried underground in termite habitat or laid underground pipes, are damaged by termites, which seriously hinders energy and information transmission. There is an accident. As a countermeasure against such an accident, a termite-proof electric wire having a structure in which nylon is provided on the outermost sheath of the electric wire has been put into practical use in recent years.

The termite resistance of nylon is said to be greater in terms of its physical hardness than its chemical composition. In fact, it has been proved that rigid plastics such as epoxy, polycarbonate and polyacetal are superior in termite resistance. .

In particular, nylon is excellent in aging resistance and hydrolysis resistance, so that it is extrusion-coated as the outermost sheath of an electric wire or cable to produce an anti-termite electric wire. As the nylon used at that time, inexpensive nylon 6 or nylon 66 has high crystallinity, has a low viscosity when melted, and has poor extrusion processability, so that expensive nylon 11 or nylon 1 is used.
2 is used. Nylon 11 and nylon 12
Extrusion coating processing conditions (240
This is because the melt viscosity is 4 × 10 ³ poise or more at ˜260 ° C. and a shear rate of 20 to 100 / s), and extrusion coating is easy. In addition, nylons 11 and 12 have remarkably small water absorption compared with other general-purpose nylons such as nylon 6, and are also excellent in cold resistance.

In particular, nylon has a very small amount of foreign matter, unevenness, scratches or other defective portions on which stress is likely to be concentrated, including nylons 11, 12, etc., and this is the starting point for the so-called notch effect, resulting in room temperature. Of course, there was a problem that cracks were easily generated even at a high temperature of about 50 ° C. Therefore, Japanese Patent Publication No. 4-61444 proposes a composition in which a copolymer comprising an amide component and a rubber component is added to nylon 11 or 12.

However, since nylons 11 and 12 are expensive, they are usually coated with a sheath made of polyethylene, polyvinyl chloride or the like in advance when manufacturing a termite-proof electric wire in order to reduce the amount used. Is extrusion coated. However, nylons 11 and 12 have poor adhesion to a sheath made of polyethylene, polyvinyl chloride, or the like, and even if an adhesive is used, it changes over time and wrinkles or swelling occurs on the surface, which is a problem.

[0007]

DISCLOSURE OF THE INVENTION The present invention improves the coating adhesion to a sheath made of polyethylene, polyvinyl chloride, etc., which is a problem in electric wires in which nylon is coated on a sheath made of polyethylene, polyvinyl chloride, etc. Do Nylon 11 or 12 is general-purpose nylon 6 or 6
Since it is a material that is 2 to 3 times more expensive than that of 6, if nylon 6 or 66 can be used for inexpensive coating, it is not applicable because it is the outermost sheath material of the ant-proof electric wire, as well as the conventional price. It is also useful as a sheath material for a single layer of ant-proof electric wire, and also as a general-purpose underground electric wire / cable.

The present invention is intended for an electric wire / cable having excellent surface hardness, notch impact resistance, cold resistance, non-water absorbency, extrusion processability, coating adhesion, and ant-proof property, and particularly ant-proof property. It is an object of the present invention to provide an inexpensive and industrially advantageous coated termite-proof electric wire / cable by using general-purpose nylon such as nylon 6 and nylon 66 while having them.

[0009]

As a result of intensive studies to solve the above-mentioned conventional drawbacks, the present inventors have found that a specific functional group-modified propylene-based polymer and a nylon such as nylon 6 or 66 are used. It has been found that the above-mentioned object can be achieved by using the outermost layer sheath to be used, and the present invention has been completed.

That is, according to the present invention, the extrusion coating layer made of a resin composition obtained by mixing (A) a polar functional group-modified propylene-based polymer and (B) a polyamide resin is an outermost sheath of an electric wire or a cable. Ant-proof wire / cable, preferably (A) component 10
To 50% by weight and 90 to 50% by weight of the component (B), preferably the polar functional group-modified propylene polymer (A) is (a) a propylene polymer, (b) an aromatic vinyl monomer. It is a modified propylene-based polymer composition obtained by melt-kneading polymerization reaction of the monomer and (c) polar functional group-containing vinyl monomer, preferably (c) polar functional group-containing vinyl monomer, propylene It is preferable to use a modified propylene-based polymer composition obtained by a melt-kneading polymerization reaction by adding 0.5% by weight or more to the polymer (a), and preferably (c) a polar functional group-containing vinyl monomer. Is an epoxy group-containing vinyl monomer or a carboxyl group-containing vinyl monomer, the polyamide resin (B) is nylon 6, nylon 66, and the innermost layer of the outermost sheath is polyethylene or polyvinyl chloride. That it is a coating layer And it provides a termite wire or cable to symptoms.

The present invention will be described in detail below.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The polar functional group-modified propylene polymer (A) of the present invention is a propylene polymer having a polar functional group, preferably an epoxy group, a carboxyl group, a hydroxyl group or an oxazoline group. is there. Preferably unmodified propylene-based polymer (a) aromatic vinyl monomer (b),
Graft-polymerizing the polar functional group-containing vinyl monomer (c),
It is a modified propylene polymer having a polar functional group.

The aromatic vinyl monomer (b) -derived component in the polar functional group-modified propylene polymer (A) is preferably 50.
The content of the polar functional group-containing vinyl monomer (c) is preferably 10% by weight or less, more preferably 1 to 15% by weight.
It is less than or equal to wt%, more preferably 0.1 to 5 wt%.
This polymerization method includes solid phase polymerization, melt polymerization, suspension polymerization and the like, but the melt kneading polymerization method is preferable. Its shape is
It may be granular, powdery, flake-like, granular or porous.

The propylene-based polymer used in producing the polar functional group-modified propylene-based polymer (A) of the present invention means a propylene homopolymer and another olefin or ethylenic vinyl monomer mainly containing propylene. A copolymer with a polymer (each of which is a copolymer containing propylene at 75% by weight or more), and specific examples thereof include isotactic polypropylene, propylene-ethylene copolymer, and propylene-butene copolymer. The propylene copolymer may be a block type or a random type, and these propylene-based polymers may be mixed and used. Further, other polymers may be used in combination within the range not impairing the object of the present invention.

Among the vinyl monomers that undergo the melt polymerization reaction, examples of the aromatic vinyl monomer (b) include styrene, methylstyrene, vinyltoluene, vinylxylene, ethylvinylbenzene, isopropylstyrene, chlorostyrene, Examples thereof include dichlorostyrene and bromostyrene, which may be used alone or in combination. Preferred is styrene.

Further, the polar functional group-containing vinyl monomer (c) used in combination with the aromatic vinyl monomer (b) includes a copolymerizable epoxy group-containing vinyl monomer and a carboxyl group-containing vinyl monomer. Examples thereof include acid (anhydride vinyl monomer), hydroxyl group-containing vinyl monomer, and oxazoline group-containing vinyl monomer. Preferably, it is an epoxy group-containing vinyl monomer or a carboxyl group-containing vinyl monomer.

Specific examples of the epoxy group-containing vinyl monomer include glycidyl methacrylate, glycidyl acrylate, allyl glycidyl ether and methacryl glycidyl ether, which may be used alone or in combination. Glycidyl methacrylate is particularly preferred.

The carboxyl group-containing vinyl monomer includes, for example, acrylic acid, methacrylic acid, maleic anhydride, maleic acid and the like, and also includes acid anhydrides, and these are used alone or as a mixture. .

The amount of the aromatic vinyl monomer (b) added is 50% by weight or less of the propylene polymer, preferably 1 to 15%.
% By weight. If it exceeds 50% by weight, the performance of the propylene polymer is impaired, which is not preferable.

The aromatic vinyl monomer (b) is added in an amount of the polar functional group-containing vinyl monomer (c) in order to prevent the propylene polymer from having a low molecular weight and to improve the compatibility with the polyamide resin. It is preferable to add at least the same amount or more, preferably 1 to 5 times. If this reaction is performed below the same amount,
There are cases in which adverse effects such as lower molecular weight of the propylene-based polymer may occur, which is not preferable.

The amount of the polar functional group-containing vinyl monomer (c) added is 10% by weight or less based on the propylene polymer,
It is necessary to be 5% by weight or more, preferably 1% by weight or more. If it exceeds 10% by weight, the amount of unreacted monomer increases, and adverse effects such as tackiness and mechanical properties of the composition may occur, which is not preferable. On the other hand, if the amount is less than 0.5% by weight, the effect of improving the adhesion to the sheath layer made of polyethylene, polyvinyl chloride or the like is small and not preferable.

The radical initiator is easily dissolved in the above-mentioned vinyl monomer due to the characteristics of the present invention, and the reaction is carried out at the melt-kneading temperature of the propylene-based polymer.
Decomposition temperature to obtain a half-life of minutes is 130-250
C. is desirable. If the specific example of the initiator is given,
t-butyl peroctate, bis (t-butyl peroxy) trimethylcyclohexane, cyclohexanone peroxide, benzoyl peroxide, dicumyl peroxide, t-butyl perbenzoate, dimethyl
Examples include di (t-butylperoxy) hexane and dimethyldi (t-butylperoxy) hexyne. The amount of the organic peroxide used is preferably 0.1 to 10 parts by weight, more preferably 1 to 5 parts by weight, based on 100 parts by weight of the vinyl monomer.

As the other additives, it is preferable to add a stabilizer because the propylene polymer is a radical-disintegrating polymer unlike polyethylene. However, it is necessary to consider the type and addition amount so as not to hinder the polymerization of the aromatic vinyl monomer (b). For example, pentaerythrityl-tetrakis ((di-t-butyl-hydroxyphenyl) propionate), ocdecyl (di-t-butyl-hydroxyphenyl) propionate, thiobis (methyl t-).
Butylphenol), hindered phenolic stabilizers such as trimethyl-tris (di-t-butylhydroxybenzyl) benzene, tetrakis (di-t-butylphenyl)
There are phosphorus-based stabilizers such as biphenylene phosphite and tris (di-t-butylphenyl) phosphite, metal soaps such as zinc stearate and calcium stearate, and antacid adsorbents such as magnesium oxide and hydrotalcite.
The amount of the stabilizer used is preferably 0.01 to 1 part by weight, and more preferably 0.05 to 0.5 part by weight, based on 100 parts by weight of the propylene polymer.

The melt-kneading polymerization reaction of the unmodified propylene-based polymer (a) with the aromatic vinyl monomer (b) and the polar functional group-containing vinyl monomer (c) is carried out in a closed container such as a Banbury mixer or by extrusion. It is preferable to use a continuous kneading machine such as a machine.
An extruder is preferable when industrial production such as granulation is considered. Further, the twin-screw extruder is easier to control the supply, kneading, and polymerization time of the reactants.

The modified propylene-based polymer is produced by feeding the powder- or pellet-form unmodified propylene-based polymer to an extruder and heating it to 130 to 250 ° C. while applying pressure to melt the unmodified propylene-based polymer. After the melt-kneading polymerization reaction of the aromatic vinyl monomer (b) and the polar functional group-containing vinyl monomer (c), the strand discharged from the die is cooled and pelletized using a pelletizer.

At this time, the vinyl monomers (b) and (c) may be mixed with the unmodified propylene-based polymer in advance and then fed to the extruder, or in a molten state using a liquid feeder. Although it may be supplied to the propylene-based polymer, it is preferable that the unmodified propylene-based polymer is mixed and impregnated in advance.

The radical initiator may be added by dissolving it in the vinyl monomers (b) and (c) in advance, or by using a liquid feeder, the unmodified propylene polymer (a) and the vinyl monomer are added.
It may be added to the mixture with (b) and (c). The stabilizer is preferably mixed in advance with the propylene polymer by using a Henschel mixer or the like.

The polyamide resin (B) used in the present invention includes polyamides obtained by ring-opening polymerization of lactams such as ε-caprolactam and ω-dodecalactam, 6-
Aminocaproic acid, 11-aminoundecanoic acid, 12-
Polyamide derived from amino acids such as aminododecanoic acid, ethylenediamine, tetramethylenediamine hexamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4- / 2,4,4-trimethylhexamethylenediamine, 1,3 -And 1,4-
Bis (aminomethyl) cyclohexane, bis (4,4 '
-Aminocyclohexyl) aliphatic, alicyclic, aromatic diamines such as methane, meta and para-xylylenediamine and adipic acid, suberic acid, sebacic acid, dodecanedioic acid, 1,3- and 1,4-cyclohexanedicarboxylic acid Polyamides derived from aliphatic, alicyclic and aromatic dicarboxylic acids such as isophthalic acid, terephthalic acid and dimer acid, and copolyamides and mixed polyamides thereof. Of these, polycaproamide (nylon 6), polyhexamethylene dipamide (nylon 66) and copolyamides thereof (nylon 6/66) are preferable, and nylon 6 is particularly preferable.

As a method for polymerizing the polyamide, generally known melt polymerization, solid phase polymerization and a combination of these methods can be adopted.

The degree of polymerization of the polyamide is not particularly limited, and a polyamide having a relative viscosity (measured at 25 ° C. by dissolving 1 g of polymer in 100 ml of 98% concentrated sulfuric acid at 25 ° C.) is in the range of 2.0 to 5.0. Two or more polyamides of the same kind having different relative viscosities may be used.

Further, the melt viscosity of the resin composition obtained by mixing the polar functional group-modified propylene polymer (A) of the present invention and the polyamide resin (B) has a melt viscosity of Toyo Seiki KK Capirograph 1B. When the temperature is 250 ° C, the shear rate is 100
The apparent melt viscosity in SEC ^-1 is preferably 1000.
Poise or more, more preferably 3000 to 2000
0 poise. When the melt viscosity of the resin composition is less than 1000 poise, it is not preferable because the coating surface has unevenness during the extrusion coating, and the coating cannot be performed uniformly, and the impact resistance and hardness are low.

The material for the outermost layer sheath of the termite-proof electric wire in the present invention is, in addition to (A) the modified propylene polymer and (B) the polyamide resin as essential components, within a range not impairing the object of the present invention. A polyolefin component may be included. As the polyolefin component, for example, a polyolefin component such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer may be added and blended.

The coating resin composition for forming the outermost layer sheath of the termite-proof electric wire of the present invention is a modified propylene polymer (A).
Preferably 10 to 50% by weight, more preferably 20 to 4
It is a composition in which 0% by weight and (B) the polyamide resin are 90 to 50% by weight, more preferably 80 to 60% by weight, and are mixed or kneaded in the above-mentioned proportions.

When the modified propylene polymer (A) is less than 10% by weight in the composition, the effect of improving non-water absorption and impact resistance cannot be obtained. On the other hand, polyamide resin (B)
However, if it is less than 50% by weight, the effect of mechanical strength, hardness, heat resistance, chemical resistance, termite resistance, etc. due to the polyamide resin cannot be obtained, which is not preferable.

In addition to these essential components, additional components can be added to the composition of the present invention within a range that does not impair the effects of the invention. As the additional component, for example, plasticizer, other thermoplastic resin, rubber, inorganic filler, flame retardant, pigment, various stabilizers (antioxidant, light stabilizer, antistatic agent,
Antiblocking agents, lubricants, copper compounds) and the like.

The dovetail-proof electric wire of the present invention is manufactured by using the above resin (A) and (B) components to produce a coating material, and using a Henschel mixer, V
After dry blending with a blender, a ribbon blender, a tumbler blender, etc., this mixture can be melt-kneaded with a kneader such as a single-screw extruder, roll, Banbury mixer, etc., and pelletized or crushed.

The coating material composition is formed by extrusion coating on the outer layer of the inner layer sheath of polyethylene, polyvinyl chloride, chloroprene rubber, ethylene propylene rubber or the like to form an anti-termite layer.

The thickness varies depending on the structure and size of the electric wire / cable, but is generally about 1 mm, and the small size may be thinner and the large size may be thicker.

[0039]

Next, the present invention will be described in detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. In the following, all parts and percentages are by weight unless otherwise specified.

Reference Example 1 <Production of Modified Polypropylene> A 30 mm twin-screw extruder manufactured by Brabender (Germany) was set to a barrel temperature of 200 ° C. (however, a feeder section 180 ° C.) and a die temperature of 210 ° C. Powdered polypropylene (Hipol J440P,
Made by Mitsui Petrochemical Co., Ltd.) Irganox 1010 on 930 parts
(Ciba-Gaiki Stabilizer) 0.5 part, Irgafos 1
68 parts (stabilizer manufactured by Ciba-Gaiki) was mixed with 1 part of calcium stearate (stabilizer). Styrene 50
Part, and a mixture of 20 parts of maleic anhydride and 2.1 parts of Perhexin 25B (manufactured by NOF CORPORATION) were dry blended with the above powder polypropylene composition. The obtained dry blend was supplied to an extruder, melt-kneaded at 15 rpm in the extruder to carry out a graft reaction, and pellets were obtained through a pelletizer. The obtained product was named modified polypropylene (1). In 4.4% polystyrene content from the calibration curve using the ratio of the styrene content of the extruded product using an infrared spectroscopic analysis of the product 700 cm ^-1 (assigned to styrene) and 1380 cm ^-1 (assigned to polypropylene) there were.

Reference Example 2 In the production of the modified polypropylene of Reference Example 1, 50 parts of styrene and 2 parts of maleic anhydride were used.
A modified polypropylene (2) was produced in the same manner as in Reference Example 1 except that 45 parts of styrene and 25 parts of glycidyl methacrylate were used instead of 0 part.

Reference Example 3 In the production of the modified polypropylene of Reference Example 1, instead of 930 parts of Hipol J440P (manufactured by Mitsui Petrochemical Co., Ltd.), the same amount of Hipol F65 was used.
Modified polypropylene (3) was produced in the same manner as in Reference Example 1 except that 8P (manufactured by Mitsui Petrochemical Co., Ltd.) was used.

(Reference Example 4) Polyamide 6 (A-1) having a relative viscosity of 2.4 in concentrated sulfuric acid was obtained by polycondensation of ε-caprolactam.

(Example 1) <Manufacture of termite-proof wire coating material / manufacture of electric wire> 350 parts of the modified polypropylene (1) obtained in Reference Example and 650 parts of 6 nylon resin (A-1) were blended, Using a twin-screw extruder, feed this from the feeder side at 200 ° C, 240 ° C, 250 ° C.
Was melt-kneaded and granulated to prepare an anti-termite wire coating composition.

Using the composition thus obtained, a test piece for measuring physical properties was prepared with an injection molding machine (IS50AM manufactured by Toshiba Machine Co., Ltd.), and the physical properties at 23 ° C. were measured according to the measuring method.

Separately, an extruder equipped with a crosshead die for electric wires (PMS30-25 manufactured by IKG Co., Ltd.) was used to coat 5 stranded copper wires with a polyvinyl chloride sheath and have a diameter of 7 mm.
The composition obtained above was extrusion-coated to a thickness of 0.8 mm.

The results of the evaluated physical properties and molding processability are
It is shown in the table.

(Comparative Example 1) 6 nylon alone was used as a resin without compounding the modified polypropylene used in Example 1, and an electric wire was coated in the same manner as in Example 1, but with a uniform thickness. It could not be covered.

However, injection molding was carried out in the same manner as in Example 1 to measure the physical properties, and the results are shown in Table 1.

(Comparative Example 2) The modified polypropylene used in Example 1 and 6 nylon were not blended, but the resin was 12 nylon (Grillamide L20G, manufactured by Ems).
Molding was carried out by itself, and the wire was extrusion-coated in the same manner as in the example. Further, injection molding was carried out in the same manner as in Example 1 to measure the physical properties, and the results are shown in Table 1.

(Example 2) Instead of blending the modified polypropylene (1) used in Example 1, the same amount of modified polypropylene (2) was used for molding, and an electric wire was extrusion-coated in the same manner as in Example. Physical properties were measured in the same manner as in Example 1, and the results are shown in Table 1.

(Example 3) Instead of blending the modified polypropylene (1) used in Example 1, the same amount of modified polypropylene (3) was used for molding, and an electric wire was extrusion-coated in the same manner as in Example. Physical properties were measured in the same manner as in Example 1, and the results are shown in Table 1.

[0053]

[Table 1]

[Evaluation Method of Physical Properties] Surface Hardness: Measurement JIS K7215 Atmosphere Temperature 23 ° C.
Target 60 or above Impact resistance: Measured ASTM D256 Notched atmosphere temperature 23 ° C Target 8 or above Cold resistance: Measured ASTM D256 Atmosphere temperature -20 ° C
Target 4 or higher Non-water absorption: Weight change rate (%) before and after water absorption test according to ASTM D570 Injection test pieces (104 × 50 × 2 mm) were immersed in water at 23 ° C. for 24 hours.

Extrusion processability: Extrusion processability and surface appearance when extrusion coating was performed with an extruder equipped with a crosshead die were examined. Those having no problem with both were marked with ◯, and those having problems with either one were marked with x.

The melt viscosity of the sample resin composition was measured with a Toyo Seiki Co., Ltd. Caprograph 1B at a resin temperature of 250 ° C. and a shear rate of 100 S.
Measured with EC ^-1 and needs over 1000 poise. Coating adhesion: 6mm width on the nylon layer of the sample wire (1/1 of the outermost layer)
(4 laps), cut into strips with a knife, and measured 180 degree peel strength with the inner sheath layer at a speed of 50 mm / min.

Termite resistance: 50 m in the center of a 210 mm diameter Petri dish
Place pine wood of m square, and put soil around it to a thickness of 5 mm.
Approximately 500 termites were placed in this, and the nylon sampled from the outermost layer of the electric wires of Examples and Comparative Examples was placed on the soil to a thickness of 0.5 mm.
A test piece press-molded into 50 mm square was placed on the plate, covered with a lid, and after 10 days, the presence or absence of damage to the test piece was visually judged.

[0058]

INDUSTRIAL APPLICABILITY In the present invention, the outermost sheath is coated with a resin composition obtained by using (A) a specific functional group-modified propylene-based polymer and (B) a polyamide resin such as nylon 6 or 66. Ant-proof wire / cable,
It is possible to improve the coating adhesion to the inner sheath layer of the termite-proof wire, impact resistance with notch, extrusion processability, cold resistance, and non-water absorption, so wires and cables using this composition as the outermost layer are termite-proof. Electric wires and cables with excellent physical properties and balance can be industrially provided at low cost.

Claims (7)

[Claims] 1. An extrusion coating layer composed of a resin composition obtained by mixing (A) a polar functional group-modified propylene polymer and (B) a polyamide resin is provided as an outermost layer sheath of an electric wire or a cable. Dove wire / cable that is characterized by 2. A component (A) in an amount of 10 to 50% by weight, and (B)
The anti-termite wire / cable according to claim 1, which comprises 90 to 50% by weight of the component. 3. A polar functional group-modified propylene polymer (A) is melt-kneaded with (a) a propylene polymer, (b) an aromatic vinyl monomer and (c) a polar functional group-containing vinyl monomer. It is a modified propylene-type polymer composition obtained by a polymerization reaction, The termite-proof electric wire / cable of Claim 1 or 2 characterized by the above-mentioned. 4. A modified propylene-based polymer obtained by adding (c) a vinyl monomer having a polar functional group to the propylene-based polymer (a) in an amount of 0.5% by weight or more and performing a melt-kneading polymerization reaction. The ant-proof wire / cable according to claim 1, wherein the composition is used. 5. The termite-proof electric wire according to claim 1, wherein the polar functional group-containing vinyl monomer (c) is an epoxy group-containing vinyl monomer or a carboxyl group-containing vinyl monomer. ·cable. 6. The polyamide resin (B) is nylon 6,
6. The dovetail-proof electric wire / cable according to claims 1 to 5, which is nylon 66. 7. The innermost layer of the outermost layer sheath is polyethylene,
7. A termite-proof electric wire / cable according to claim 1, which is a coating layer of polyvinyl chloride.