TW200915354A - Coaxial cable - Google Patents

Abstract

This invention provides a high-frequency coaxial cable comprising an inner conductor and an insulator layer covering the surface of the inner conductor. In the coaxial cable, the insulator layer has satisfactory side pressure resistance, and the attenuation level in the transmission is low. An insulating layer having a higher foaming level and a higher mechanical strength as compared with the conventional insulating layer can be formed by foam molding a resin composition comprising a cyclic olefin resin, a high-density polyethylene, and a low-density polyethylene and/or a linear low-density polyethylene. As a result, the insulator layer covered on the inner conductor in the coaxial cable has lowered dielectric loss tangent and lowered permittivity and possesses excellent transmission characteristics and mechanical properties.

Description

200915354 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a coaxial cable using a cyclic olefin resin. [Prior Art] In recent years, there has been an increasing demand for wideband communication of mobile phones, the Internet, and wireless. Then, in order to transmit information at a higher speed and in a large amount, the high frequency of the electrical signal is remarkably performed. Therefore, it is required to have a coaxial cable having a small amount of attenuation in a high frequency band and a small signal delay. However, the coaxial cable is mainly composed of a center conductor, an insulator layer provided thereon, and an outer conductor provided on the outer periphery thereof. It is valued in the low attenuation of the high-frequency band, and it is most effective in realizing high-frequency coaxial cable, _low, and insulator layer. Moreover, foaming is more effective for lower attenuation. However, it is difficult to maintain the shape of the foam by reducing the lateral pressure resistance of the insulating layer by foaming it. It is known that the degree of foaming of the insulating layer is increased, and the dielectric material of the insulating layer can be effectively used, and the insulating material having a small positive electrical connection can be an annular thin-smoke resin. The cyclic olefin resin is excellent in foam formability, and is excellent in properties excellent in lateral pressure resistance from high rigidity. Therefore, in the patent document, the high-frequency coaxial slow line of the raw borneol thin resin is used. Further, Patent Document 2, π, and the like, an ethylene-based copolymer and a polyolefin, and an insulating material excellent in lateral pressure resistance. [Patent Document No. 2000-2971] [Patent Document 2] JP-A-2000-31 1 51 9 pp 2752-9752-PF; Ahddub 5 200915354 [Disclosed] [Problems to be Solved by the Invention] In the case where the coaxial cable having a smaller amount of attenuation in the high-frequency band is expected, it is required to improve the coaxial cable having higher coaxial line-collecting performance than Patent Document 1 and Patent Document 2. It is known from the examples of Patent Document 1 and Patent Document 2 that the degree of foaming of the insulator layer is about 62% in the former and about 72% in the latter. Therefore, in order to realize the recognition of the ancient post, the arrest of a, f

Mussels now have a smaller coaxial cable in the frequency band, which can be considered to improve the degree of foaming of the insulator layer. However, generally, the degree of foaming is increased, and the side pressure is deteriorated due to swelling of the foaming cells. When the foaming cell is broken due to expansion, the insulating layer having a low dielectric constant cannot be obtained. Therefore, it is required to maintain the independent e of the foamed cells even if the degree of foaming is increased, and to have a coaxial cable which can sufficiently use the lateral pressure resistance as a coaxial cable. The present invention has been made to solve the above problems, and an object of the invention is to provide an insulator/amp; a coaxial cable having a lateral pressure resistance which can sufficiently utilize a material coaxial gauge wire and a higher degree of foaming of the insulator layer. [Means for Solving the Problems] The present inventors have made intensive studies to solve the above problems, and found that by including a cyclic olefin resin, a high density polyethylene, a low density polyethylene, and/or a linear low density poly The foaming molding of the ethylene resin composition can solve the above problems 'to achieve the present invention. In particular, the present invention provides the following. (1) A coaxial cable comprising: an insulating layer comprising a cyclic olefin resin, a high density polyethylene, a low density polyethylene, and/or a linear low 2254-9752-PF; Ahddub 6 200915354 The layer of the resin composition of the density polyethylene is foam-molded, and the above-mentioned insulating foam has a foaming degree of 80% to 90%. According to the invention of (1), the insulating layer in the same (four) line of the present invention comprises a ring-shaped flue-cured resin. Since the cyclic thin smoke resin has a low dielectric positive connection, a low dielectric constant, good foam formability, and a high modulus of elasticity, it is expected that the lateral pressure resistance of the foamed molded body can be improved. Therefore, the insulating layer in the coaxial age of the present invention has the above (4), and the same (four) wire of the present invention can be suitably used as a disadvantage that the high-frequency m has a lack of recyclability in the cyclic olefinic resin. However, the insulating layer ' in the coaxial line of the present invention contains low-density polyethylene and/or straight-bonded low-density polyethylene which are excellent in wrapability. Therefore, it is possible to make up for the shortcomings of the cyclic olefin (tetra) resin, and to produce an insulating layer excellent in wrapability. Further, it is preferable because it has good foam formability due to low-density polyethylene or the like, and it is preferable to increase the degree of foaming of the insulating layer. However, low-density polyethylene, and/or linear low-density polyethylene, have a high dielectric I. However, T is an insulating layer in the coaxial cable of the present invention comprising high density polyethylene. Since the high-density polyethylene has a low positive dielectric connection, it can be used with a cyclic olefin resin to compensate for the high dielectric integrity of the low-density polyethylene. Furthermore, high-density polyethylene also has the disadvantage of poor foam formability, but it can be made up of olefin-based resin and low-density polyethylene and/or linear low-density polyethylene. By utilizing the advantages of the above three components or four components, it is suitable for a high frequency coaxial cable. The degree of foaming is shown to be the extent of the bubbles contained in the insulating layer. A large number of bubbles are in the insulating layer, and a proportion of a gas having a low dielectric constant is increased. Therefore, 2254-9752-PF; Ahddub η 200915354 has a higher degree of foaming than the dielectric junction and dielectric constant of the insulating layer in the coaxial cable, and a coaxial cable having a small attenuation can be obtained even at a high frequency. In the insulating layer of the coaxial cable of the present invention, a higher degree of foaming than the former can be achieved. This is because of the excellent lateral pressure resistance of the cyclic olefin resin and the excellent foam formability of the cyclic olefin resin and the low density polyethylene and/or the linear low density polyethylene. As long as the foam formability is good, even if the degree of foaming is increased, the foamed cells can exist independently. In addition, the degree of foaming in this specification, f, is the degree of foaming which is obtained by the following formula (1). [Number 1]

(2) The coaxial cable according to the above aspect, wherein the resin composition contains 15% by mass to 30% by mass of the above-mentioned styrene-based resin, and the above-mentioned high-density polyethylene and the above-mentioned low-density polyethylene and/or linear chain The total amount of the low-density polyethylene is 70% by mass to 85% by mass. According to the invention of the above (2), the content of the ring-shaped rare-kick tree in the insulating layer contained in the coaxial cable is in the above range, and the cyclic olefin-based resin can be sufficiently exhibited. The effects of foam formability, low dielectric constant, and side pressure resistance. χ, by making the content of the ring-shaped flue-curable resin in the above range, the disadvantage of a slight lack of windability can be sufficiently compensated by polyethylene, and therefore, it is more suitable by using the above-mentioned insulating layer for the coaxial cable. Coaxial cable for high frequency. (3) The coaxial cable according to (2), wherein the low-density polyethylene and/or the linear low-cost polyethylene are contained in an amount of 20% by mass to 40% by mass. 2254-9752-pF; Ahddub 8 200915354 According to the invention of (3), the total amount of low-start polyethylene and/or linear low-density polyethylene contained in the insulating layer contained in the coaxial cable is In the range, it is possible to sufficiently compensate for the high dielectric constant of the high-density polyethylene and the ring-shaped flue-cured resin, in addition to the effect of excellent the recyclability of the polyethylene. Therefore, a coaxial I line which is more suitable for high frequency can be obtained. (4) The coaxial cable according to (1) or (3), wherein the insulating layer has a compressive strength of 800 N/cm 2 or more and an attenuation of 24 dB/1 〇〇 m or less. According to the invention of (4), even if the degree of foaming of the insulating layer in the coaxial cable is increased, the void in the insulating layer is increased to lower the dielectric constant of the insulating layer, so that the attenuation is 24 dB/l 〇〇m or less. Since the compressive strength is 8 〇〇N/cm 2 or more, a coaxial cable having sufficiently excellent mechanical strength can be obtained. Further, the insulating layer in the coaxial cable of the present invention comprises low density polyethylene and/or linear 2 low density polyethylene. Therefore, all of the other materials of the coaxial cable are excellent in the ability to be wounded. Therefore, the insulating layer is excellent in the recyclability, and the entire coaxial gauge wire is excellent in wrapability, and can be a good coaxial cable. Compressive strength refers to the compressive load, the maximum stress that the material can withstand, and is one of the indicators of the lateral pressure resistance of the insulating layer of the coaxial cable. The insulating layer having a low compression strength is damaged by the force applied during the production of the coaxial cable, and is not suitable as an insulating layer for the high-frequency coaxial cable. The insulating layer used in the present invention can be suitably used as an insulating layer for a coaxial cable because the compressive strength is 8 〇〇N/cm2 or more. The insulating layer in the coaxial cable of the present invention preferably has a compressive strength of 8 〇〇N/cm 2 or more. At 800 N/cm 2 or more, since it has sufficient mechanical strength, it can be used as an insulating layer for a coaxial cable. 2254-9752-PF; Ahddub 9 200915354 The insulating layer in the coaxial cable of the present invention preferably has an attenuation of 24 dB/1 〇〇m or less. When the attenuation exceeds 24 dB/l 〇 0 m ', the transmission loss becomes large, which may impair the normal operation of the electronic device or the like. ^ In general, the high frequency will attenuate when the dielectric is connected. In particular, it lies in the 冋V page of the slave; the positive connection will cause a large impact. Therefore, in order to make the coaxial viewing line decay in the high-frequency band, the π-gate two policies are only small, and the dielectric of the insulating layer needs to be small.

(5) The coaxial cable according to any one of (1), wherein the insulating layer has a moisture permeability of 〇55 g/m2.day.atm or less. According to the invention of (4), it is not preferable to increase the attenuation, and is more suitable for the high-frequency use of the insulating layer in the coaxial cable of the present invention, and the high dielectric constant water molecules are worn for almost the reason. In addition, it prevents the internal conductor from being eroded by moisture penetrating the insulating layer. Therefore, it is possible to obtain the same pure line that can be used for a long period of time. The water permeability of the insulating layer used for the coaxial gauge wire of the present invention is preferably 〇.55^._. More than ^55^2, such as ._, tends to cause moisture to adhere to 'significantly when there is corrosion and there is a problem of poor conduction. (6) The coaxial cable according to any one of (1) to (5) wherein the insulating layer ' has a relative dielectric constant of 1 · 200 or less in a frequency region of 1 GHz i 1 GGHz. According to the invention of (6), the low dielectric constant of the dielectric constant of the insulating material of the coaxial cable of the present invention is obtained by the graph and the pig, and the coaxial cable is obtained by the coaxial cable. In the case of the transmission signal, the delay time is small, and the high-speed and large-capacity coaxial cable corresponding to the communication can be used. 2254-9752-PF/Ahddub 10 200915354 The insulation layer in the coaxial cable of Maoyue is based on the relative median number of the frequency range from 〖 to 〇Gf{z. The electric constant is preferably less than I 2 . In the case where the relative dielectric constant of the above frequency region is .J or less, the delay of the signal is small. (7) The coaxial cable according to any one of (1) to (6), wherein the upper-smoke resin is a total of (4) of the ring-shaped women (4) or a substance thereof. According to the invention of (7), the %, olefin-based resin has the above-mentioned group 5' by the 佶a hunting, and the coaxial line is made to have a value of #^, and the fusible property, the compressibility, the compressive strength, and the moisture are obtained. The effect of excellent balance of penetration characteristics and the like. The coaxial winding according to any one of (1), wherein the cyclic olefin resin is in a frequency region of i 〇 GHz and has a relative dielectric suspension of 2.3 or less, a medium; The fast connection is 4xl〇-4 or less, and the elastic modulus of the room at room temperature is 2.0 GPa or more. According to the invention of (8), since the human is in the ring-shaped olefin resin of the coaxial cable layer of the present invention, the olefin core t 1 is connected to be low, so that the (tetra) cyclic olefin resin is used. , can make a low dielectric insulation layer. If the dielectric of the insulating layer is low, the attenuation of the coaxial cable will change - the coaxial cable of the insulating layer is suitable for high frequency. The low-temperature, fine-grained olefin resin with a relatively low dielectric constant is used to make the letter L of the length of the letter. It is small and can be used as a high-frequency coaxial thin wire to obtain an excellent bending elastic coefficient. Refers to the material's deformation resistance to f-curvature stress. The material with high modulus of elasticity has excellent resistance to f-curvature stress, 2 2254-9752-PF; Ahddub 11 200915354 mechanical strength will become stronger and better. The bending stress in this specification is the f-elastic coefficient of the stipulated IS0H8敎. Furthermore, the insulating layer of the coaxial line of the present invention comprises a material having a low-density polyethylene material which is rewritable. Therefore, it can be prevented from becoming a fragile material. The flexural modulus of the olefin-based resin is preferably 2 Gh or more, more preferably 2 GPa or more and 3.5 GPa or less. If the bending elastic modulus is not full, the lateral pressure resistance is impaired. If it exceeds 3.5 GPa, the wrapability is reduced and the blending range is narrowed.

[Effects of the Invention] According to the present invention, a coaxial cable having an insulating layer which is more resistant to lateral pressure than the (four) wire and which has a higher degree of foaming of the insulator layer can be obtained. Since the degree of foaming of the insulating layer in the coaxial cable is high, the dielectric positive connection and the dielectric constant of the insulating layer are lowered, and the coaxial cable for high frequency is well utilized. [Embodiment] Hereinafter, embodiments of the coaxial cable of the present invention will be described in detail, and the present invention is not limited to the embodiments described below, and may be modified as appropriate within the scope of the present invention. In addition, where the description is repeated, it is appropriate to omit the description, but it is not intended to limit the gist of the invention. <Cyclic olefin-based resin> Hereinafter, the olefin-based resin which is an essential component of the coaxial cable of the present invention will be described. The cyclic olefin resin has properties such as low dielectric integrity, low dielectric constant, foam formability, low water absorption, and lateral pressure resistance. 2254-9752-PF; Ahddub 12 200915354 is suitable for inclusion in coaxial The material of the insulation of the cable. The cyclic olefin-based resin to be used in the present invention is a polyolefin-based resin which contains a cyclic olefin component as a copolymerization component, and is not particularly limited as long as it is a polyolefin-based resin containing a cyclic olefin component in a primary bond. For example, (al) an addition polymer of a cyclic olefin or a hydrogenated product thereof, (a2) a cyclic olefin copolymer with a hydrazine; a dilute hydrocarbon or a hydrogenated product thereof, U3) A ring-opening (co)polymer of an olefin or a hydrogenated product thereof. Further, the cyclic olefin resin containing the cyclic olefin component of the present invention as a copolymerization component is contained, (a4) the resin of (al) to (a3) has a polar group and is grafted and/or copolymerized. Saturated compound. Examples of the polar group include a carboxyl group, an acid anhydride group, an epoxy group, a decylamino group, a decyl group, a hydroxyl group, and the like, and an unsaturated compound having a polar group may be mentioned.

Further, the cyclic olefin component used in the present invention is contained as a copolymerization component-olefin addition copolymer or a hydrogenated product thereof. The cyclic olefin resin, the second resin can be, for example, a POLYMER company, and y can also be a commercially available resin. Commercially available cyclic olefin

3, T0PAS (registered trademark) (T0PAS ADVANCED APEL (registered trademark Mitsui Chemical Co., Ltd.), 2254-9752-PF; Ahddub 13 200915354 ΖΕ0ΝΕΚ registered trademark) (曰本ZE〇N八A system), ZE0N0R (registered trademark) (manufactured by Nippon Co., Ltd.), arton, and singular ART0N (registered trademark) (manufactured by jSR). It can be suitably used in the addition copolymer of the (a2) cyclic olefin and the α-olefin of the present invention, and the helmet is particularly limited. Particularly preferred examples thereof include a copolymer of 3 [1] an α-olefin having an inverse of 2 to 20 in terms of _m _ component, and [2] a fine fe component of the following formula (I).

•RJ0 -R11

(In the formula, R^R12 may be the same or *s? respectively. The difference is selected from the group consisting of a hydrogen atom, a halogen atom, and a hydrocarbon group. The m group 'R9 and R1., R&quot; and R12 may also be One

The formation of a 2 hydrazine hydrocarbon group, R9 or plG κ times R, and / or R &quot; also form each other. Further, the η system represents 0 or a positive integer, and when the clothing η is 2 or more, R5 to R8 may be the same or different in each of the respective units. In each [[1] carbon number 2 to 20: _ olefin component], it can be suitably used in Taiyi's addition of the cyclic olefin component of the present invention and other copolymerization components thereof. The α-olefin having a carbon number of the copolymerization component of the compound is not particularly limited. 20 For example, ethylene, propylene, 1 ~ butyl 1-pentel, 1 - hexanyl, 3 ~ 曱 it! Stele, mercapto-1-butene, 3-methyl-p-pentene, keto-pentene, 4-methyl-bupentin 4~methyl-1-hexene, 4,4~dimethyl Containing 1-hexene, 4, 4-didecyl-bu-decyl decene, 4-ethyl-1-hexene, 3-hexene, 1-octene, 1-decene, and b + 8 U — butadiene, 1-tetradecene, i-hexadecene, 2254-9752-PF; Ahddub 14 200915354 octadecene, hexadecene and the like. In addition, the unique 1 m' also w η too ° Hai '^ α-olefin component, can be single &quot; heavy can also make Xiao 2 at the same time the best. In the crucible 4, ethylene ([2] is a cyclic olefin component represented by the general formula (1)] is used alone, and the formula (1) is added to the cyclic olefin component which can be favorably mixed with ethylene or the like. The polymer is a copolymerized component and is a cyclic hydrocarbon component represented by the formula (I). Specific examples of the group h / which consists of the same atom, / 8 atomic atom, and a smoky group of the formula (1), and the wind R to R, for example, a dentate atom; a methyl group, an ethyl group, The two gases, chlorine, desert, etc. may be phased with M t soil, butyl, etc., and the likes may be partially different or may be identical. Further, 'R ~ R 】 2 (4) 具体 _ m specific example 'for example, a hydrogen atom such as i atom; methyl, both wind, bromine propyl, isopropyl, butyl, sin An alkyl group of a hexyl group, a hexyl group, a stearyl group, etc.; &quot; m ^ ^ a cyclohexyl group; a quinone, a methyl group, an ethylphenyl group, a cumyl group, a naphthyl group, a fluorenyl group, etc.: Aromatic hydrocarbon group; benzyl group, substituted or unsubstituted oxime ethyl group, other alkyl group, etc., which may be different, and the earth is the same. The knives are different, and all of the phases R and R, or R11 and r 12 may be integrated to form a divalent hydrocarbon group. For example, ethylene, propylene, and The specific R9 or R1, and R&quot; or! ^ Mutual (four) 'Alkyl, etc. The ring may also be a multi-ring, which may be a multi-ring with a bridge, or a ring of knots, or a ring combined by the rings. Further, the ring = 2254-9752-PF; Ahddub 15 200915354 has a substituent such as a methyl group. Specific examples of the cyclic olefin component represented by the formula (1) include bicyclo [2_2.1] hept-2-dilute (commonly known as: original pentylene), 5-methyl-bicyclo[2.21] Geng-2 -ene, 5,5-dimethyl-bicyclo[2.2.1]hept-2-ene, 5-ethyl-bicyclo[2.2.1]hept-2-ene, 5-butyl-bicyclic [2. 2· 1 ]hept-2-ene, 5-ethylene-mono-bis[2.2.1]hept-2-ene, 5-hexyl-bicyclo[2.2.1]heptan-2-ene, 5- Octyl-bicyclo[2·2.1]heptene, 5-octadecyl-bicyclo[2·2·: Men Geng

2-ene 5-methylene-bicyclo[2.2.1]hept-2-ene, 5-vinyl-bicyclo[2. 2-1]hept-2-ene, 5-propenyl-bicyclo[2·2.1 Ring-shaped dilute smoke of 2 rings of heptene and olefin; trinuclear [4.3.〇. 癸__3,7_diene (commonly known as: dicyclopentadienyl ring [4·3.0.12'5]癸-3- Alkene; tricyclo[4.4.〇.12.5] 十_碳_3,7_-can or tricyclo[4, 4. G. deca-carbon-3,8-two women or some of these stolen goods (or rings) a tricyclo[4 3 〇I2" eleven carbon-3-ene; 5_cyclopentyl-bicyclo[2.2.1]hept-2-ene, a cyclohexyl group — double = [2· 2· 1] hept-2-ene, 5-cyclohexenylbicyclo[2. 2. 1;] hept-2-ene, phenylbis%, [2.2.1]g-2 - alkene and other 3-ring cyclic olefins; four soils [4.4. 〇I2, 5 a difficult - q one, heart palpitations.] eleven slaves ~ 3 ~ ene (also known as tetracyclic ten - contract), 8- Methyltetracyclo[4 4 2,5 7,1() Γ,," 杈--3-ene, 8-ethyl 衣· . 〇. 1 5· 17 , .] 12-carbon-3~ ene , 8--Asian Yiyi production [4.4.0. I2" 1?. 丨. Brother 1f base 4% • 1 ] Dodeca-3-ene, 8_Asia [4.4.0.1-.!,^ + ^ 8 ethylene tetracyclic" ten-stone ana-3_ thin, land| [4.4.0.1- Γ,1〇1 土8 乙知基四环

' 》12 carbon-3 ene, 8~2, method I

[4.4.0 I2·5 iv.h,, propylene-tetracyclic.] 4-ring cyclic olefin such as decene-3-ene; 16 2254-9752-PF; Ahddub 200915354 8-cyclopentyl-four Ring [4.4. 〇. I2'5· 17.1°] dodecyl-3~-ene, 8-cyclohexyl-tetracyclo[4. 4. 0_I2,5·Γ10]dodec-3-ene, 8-ring ?甘甘^|~四环[4.4_0.12'5.17'1〇]Dodeca-3-ene, 8-phenyl_环士# Only π I~四环 [4. 4. 0. I2,5 · ι7'ι〇]Dodeca-3-ene; tetracyclo[7. 4. l3,eg text • υ . 0 . ' ] fourteen carbon-4, 9, 11,13-tetraene (also known as 1, 4-indenylene 4" '% 4a, 9a-tetrahydroanthracene), tetracyclic [8.4.14,7.〇1'1°, 〇3,8] fifteen carbon-5,1〇1 ( 1,4-Methylene-14,43,5,10,1(^-hexahydroindole [6.6.1.13' 02'' 7. 〇9'14]-4-hexadecene [6.5.1. I3 ·6, 02,' ?.09,13] - 4-fifteen thin [7. 4. 0. 〇2 \ 1 3, ( 5 1 10. U ] one 4- - five 蝉 [8. 7. 0 12'\ I4.1 I11.17. 03'8· 012' 16]-5-. Twenty [8. 7. 0. V'\ 〇3'8 .I4·7.012'17. I13' ,6 ]-14-- Polycyclic cyclic olefins such as icosene ipolymer, etc., 14-tetraene%,", five rings

C. Five-ring, five-ring, seven-ring, ‘ 七, seven-ring, laughing, diene, and other cyclic hydrocarbon components, which may be used alone or in combination of two or more. Among these, bicyclo [2 21]heptane-2, weighed norbornene, tetracyclododecene can be preferably used. ( 丫 ° [1] α _ olefin component of carbon number 2 to 20 and formula [2] (the polymerization method of the cyclic olefin component and the hydrogenation of the obtained polymer: the table is not particularly limited) It can be carried out by a conventional method, and it is preferably a copolymerization of a block or a block, and it is preferably a random copolymerization. D. Further, there is no particular limitation on the polymerization catalyst to be used, and the conventional use of Ziegler Natta can be used. System, metathesis system, metallocene catalyst:: First: the method of the catalyst of Baizhi. It can be used well in the addition copolymer of the olefin and α-olefin of the present invention or its hydrogenated product, Maojin: 2254-9752-PF; Ahddub 17 200915354 It is better to use catalyst or Ziegler-Natta catalyst. The metathesis catalyst can be used as a molybdenum for the ring-opening polymerization of cyclo-hydrocarbons. Or a tungsten-based metathesis, a catalyzed catalyst, and a catalyst obtained by using a metathesis catalyst, and an inorganic carrier, as described in the Japanese Patent Publication No. 58-1901728, and the like. Holding a transition metal catalyst, etc., the primary bond ^ double bond (four) 90% or more, the carbon-carbon double bond in the aromatic ring of the side bond The hydrogenation preferably 98% or more.

[Other copolymerization components] Second, the composition of the month can be particularly well used (a2) an addition copolymer of a cyclic olefin and an olefin, a component, and [2] a formula (1): a second (1) carbon number 2, ... hydrocarbon And the ring olefin component of the present invention is not damaged.

Unsaturated singular body encapsulation 'may be included in other copolymerizable arbitrarily copolymerizable and private 4 „D. For example, there is no specific amount in the U sub-component, and there is no particular limitation. For example, a specific example of a hydrocarbon monomer bonded from an upper carbon-carbon double bond is contained in the molecule, and one or more carbon-carbon double bond-bonded hydrocarbons may be used. Hexadiene; cyclohexadiene, il octadiene, etc. chain non-common two original borneol... ethyl methyltetrazolium, -b...- 5-isopropylidene~ flank it: base: - original borneol, alkene, 4,9,5,8-m_Q-2 - ring-shaped non-co-light n^4' _4a'5,8,8a,9,9a-octahydro-benzo , isopropylidene-5-formipenene; 2-2254_9752'PF; AhddUb 18 200915354 Ethylene-3 isopropylidene-5_original borneol etc. Among these, 4 〗 Guangji - 2, 2 - borneol two!, 4_ hexene, 1,6-octane, said „ yokediene, especially with-ring &amp; _, and ring non-common 乂 戍 戍Alkene, 5-ethylidene-2-1-propanyl-2-original ice moon, 5_methylene, and ''s/f-yl-2-orinelene 1,6-octyl Diene is preferred. The content of the cyclic polyolefin resin in the insulating layer of the hexene-based olefin is % to 3% by mass. When the content is less than 15% by mass, the co-transmission characteristics, compressive strength, water permeability, and the like are inferior, and there is a possibility that sufficient reproducibility cannot be obtained. A% of the amount of <polyethylene woman> 5 children's Ming is about the necessary components of the coaxial cable of the moon, S' low: polyethylene, linear low-density polyethylene. The high-density bismuth material is suitable for use as a dielectric material for the insulating layer in the coaxial iron wire. The low-density polyethylene and the direct-bonded low-density polyethylene are excellent as a material for the insulating layer in the coaxial I-line because of the wrapability. High-density polyethylation, low-density polyethylene, and direct-bonded olefins are recommended by JISK 6922-1. The MFR of nn-1 is preferably 1. 〇~10. 〇g/1〇min, 2· 0~8· Og/l〇min is better. When the temperature is lower than l 〇g/i〇min, the flowability is deteriorated, and good formability and susceptibility cannot be obtained. If the moldability is more than 10·〇g/10min, the formability is good, but it is not available. The possibility of reversibility. The total content of the high-density polyethylene #, low-density polyethylene, and the direct-bonded low-density polyethylene of the insulating layer of the coaxial cable is preferably 7 〇 mass% to 85 mass%. 2254-9752-PF; Ahddub 19 200915354 The content of low &quot;polyethylene and linear low density polyethylene ‘==, the amount is better. Less than 2. In the case of % by mass, there is a low insulating screen and a steep susceptibility, and if it exceeds 4 〇 mass%, there is a possibility that the dielectric constant of the insulating layer cannot be secured. <Other components> f circumference; the insulation layer in the coaxial I line of the month, adding other thermoplastic resin, various kinds of matching J, etc., without damaging the characteristics of the second layer. Other resins, ^ 7 ^ . j are not, for example, other polyolefin-based resins, L "resin" «lipids, etc. These other resins can be used individually or in groups:: die. Again, the need for coaxial cable can be wound In the case of the above-mentioned properties, it is preferable to add an elastomer to the cyclic polyolefin resin, and the elastomer to be added is not particularly limited as long as it does not impair the attenuation amount of the coaxial cord, and is particularly limited, for example, The polyolefin elastomer or the styrene elastomer is preferred. The Dingping r body is preferred. In particular, the polyolefin elastomer is preferably obtained by balancing the attenuation amount and the recyclability. Further, the compounding agent can be exemplified. Stabilizer (oxidation preventive agent 哎μ 4 柷 oxidant, heavy metal stabilizer, purple i external absorbent, thermal stabilizer, etc.), 'Bundle preventive agent, flame retardant, flame retardant, colorant (dye or pigment, etc.) ), 'Inter,, and Code w lubricants, plasticizers, lubricants, mold release agents, crystal nucleating agents, anti-sagging agents, wooden wraps, etc. The insulation layer of the coaxial cable is copper with conductors, etc. Metal contact, m is therefore preferred to add heavy metal stabilizer. Heavy metal stabilizer The sulphuric acid derivative "&quot;...brand name ADKSTABCDA6), a hydrazine derivative (for example, J ^ 〇 名 Irganox MD1 〇 24), oxalic acid amide derivative (for example, trade name Naugard XL), sulfur-containing Phosphorous acid compound (for example, trade name H〇stan〇x 〇sp-., etc., as long as it does not impair the characteristics of the line, the type of heavy metal stabilizer is not 2854-9752-PF; Ahddub 20 200915354 specifically defines 'heavy metal In addition, it is not particularly limited to the use of 0.3% by mass of the resin component in the addition of the stabilizer, and the method of adding the rabbit to the rabbit is not particularly limited. Other additions of resin, etc. are more preferable. "Japan, Polyethylene" (coaxial cable) Coaxial, the structure of the wire is not particularly limited, internal _, insulating layer, external conductor, and external examples: = line. "Title: The "insulating layer includes a resin composition: a layer of a double layer" / refers to an insulating layer coated on the inner conductor. The coaxial portion is coated on the insulating layer to form an electric portion conductor, and further Covered to form a skin. The external conductor is not particularly limited as long as it has conductivity, and may be a conductive metal such as copper or a copper alloy. Further, the inner conductor may be twisted with a plurality of conductive metal wires. The outer conductor is, for example, a V-body woven fabric in which a plurality of conductor wires are woven into a mesh shape. For the conductor wires for the outer conductor, for example, a copper wire or a copper alloy is used. A method of winding a ribbon-shaped conductor into a spiral 'double winding or the like. - The method of foam molding of the resin composition of the present invention is not particularly limited as long as it is a desired degree of foaming. A preferred foam forming method is gas foaming. Gas foaming is a method in which a foaming agent is pressed into a melter and the insulating material is foamed while being extruded from a conductor. The blowing agent may also be an inert gas such as nitrogen, argon or carbonic acid gas, · f alkane, propane, butane, 21 2254-9752-PF; Ahddub 200915354 For example, urine: urine = gas of 1 break. Further, a foaming aid such as a foaming agent: a foaming agent, a bamboo shoot: ..., a compound, a zinc oxide, a zinc stearate, or the like may be used in combination. The X/packing aid is not limited to this. It may be used alone or in combination of two or more types. The foaming agent may be mixed with the material of the extruder in advance, or may be supplied to the extruder by the supply port of the container. The layer is better. The degree of foaming is not full. ^|The electrical connection becomes high and there is a special shape as a high-frequency coaxial line. If the degree of foaming is excessive, there is a possibility that the mechanical strength of the insulating layer cannot be sufficiently maintained. <Method of Manufacturing Coaxial Cable> A method of manufacturing the coaxial cable of the present invention is not particularly limited, and a general square 4 can be used. For example, a coaxial cable can be manufactured by an extruder. Further, the type of the extruder may be, for example, a 'two-axis extruder' uniaxial extruder, or may be connected to the gas m and the coating function. The coaxial cable is manufactured, for example, by using a foaming agent in an extruder, and foaming it on the inner conductor to form a foaming insulating layer on the outer circumference of the inner conductor. When the foamed insulating layer is coated on the inner conductor, a coating device such as a right-angle head die is usually used. The conductors of the inner conductor pair coating device are usually manufactured in the air without damaging the characteristics of the coaxial I wire. When the same amount of attenuation is generated, the coating device of the inner conductor of the crucible is filled with an inert gas such as nitrogen to suppress oxidation of the resin component by air, and it is preferable for the purpose of stability. The situation. The outer conductor is further formed on the foamed insulation layer in the usual manner, and finally 2254-9752-PF; Ahddub 22

200915354 The outer skin is coated on the outer σ卩 conductor in the usual way. [Examples] Hereinafter, the present invention will be more specifically described by way of examples and comparative examples, but the present invention is not limited to the examples. <Various Materials> [Ringed Hydrocarbon Resin] • T0PASADVANCEDP0LYMER company name, trade name. TOPAS8007F-04 ^ TOPAS6013S-04 &gt; T0PAS6015S-04. 目〇ΖΕΟΝ Company, trade name: ZE〇N〇R1〇6〇 R The elastic coefficient, specific gravity, dielectric constant, and dielectric constant of the above cyclic olefin resin are positively connected. The coefficient of elasticity is determined in accordance with the measurement. The dielectric characteristics (dielectric suspension, dielectric positive connection) are based on the network analyzer Mm manufactured by AgUent and the complex dielectric constant measuring device of the cavity resonator manufactured by Kanto Electronics Co., Ltd., 1 GHz 3 GHz, 1 Ζ relative dielectric constant cavity The resonator perturbation method is μ =. Further, in the measurement, the insulating layer was formed to have a predetermined shape length of 8. _)' is broadcast into the cavity resonator. The results of each measurement are not shown in Table 1. [Table 1]_Elastic coefficient ___(GPa) TQPAS8Q07F-04 ~J~d TQPAS6013S-0T~~tj TQPAS6Q15S-〇r~~~TT ZE0N0R1Q6QR~~ . 1GHz dielectric positive connection j· 26 0. 0004 2. 26 2. 24 0. 0003 —2^ 23 0. 0002 ~2Γ^&quot; 3GHz 10GHz

Dielectric-positive _〇T〇QQ2~ToooF From Table 1, it is confirmed that m~J is on the upper ton of olefins, and the elastic modulus is above 3.5GPa, which is counted at 2.0GPa, including sufficient resistance. Lateral pressure and moderate can be 2524-9752-PF; Ahddub 23 200915354, %. Further, when the dielectric constant is 2.3 or less and the dielectric positive connection is 4 χ丨〇 or less, the relative dielectric constant of the insulating layer after foam molding can be prevented from being high due to the relative dielectric constant of the material portion. . [Polyethylene] High-density polyethylene: manufactured by T0S0 Co., Ltd., trade name: Nipolonhard 4010 MFR 5.5g/10min (JiS K62922-1) Cao

Low-density polyethylene: manufactured by Sumitomo Chemical Co., Ltd., trade name: Sumikathene G401, MFR4.〇g/1〇min (JisK 6922 — d linear low-density polyacetonitrile; manufactured by Sumitomo Chemical Co., Ltd., trade name·— Let (4) LGA401 MFR3.Og/l〇rain(JISK 6922-1) <Measurement. Evaluation Method> Determine the degree of foaming, compressive strength, moisture permeability, relative dielectric constant, and decay by the resin formulation shown in Table 2 below. [Measurement of foaming degree] The degree of foaming is measured by a heavy method in the production step of the coaxial cable described below. The density of the resin before foaming is measured, and the density of the foam is made into the above formula (1). Determination of [compressive strength],:;; Table 2; ^ grease composition mixing, using the tube. The temperature is set to 200 ° C, 庳 π of the die D also! nr., - now 5 again For the 195-inch extrusion device (Fig. 1), the sheet of nitrogen foamed is used to suppress ψ # ,

Formed. The mixed composition is fed into the hopper A, and the mixing in the center of the tube is dominated by c p B. The sheet was formed into a thickness of 5 mm. The obtained sheet having a thickness of 5 minutes was cut into 30_xl 00 mm, and the compressive strength was measured by applying a load to the thickness of 2254-9752-PF/Ahddub 24 200915354. For the measurement, Tensilon U TA_5〇KN manufactured by 〇rientec was used, and 丨(4)/^^ [Measurement of moisture penetration] delayed ISG1D156-U differential pressure method was used at the test speed, and used in the finalizer (4) VAC-made by Coffee Company V2 differential pressure gas permeation device measurement. [Manufacturing Method of Coaxial Line] Using the coaxial cable manufacturing apparatus shown in Fig. 2, a foamed insulating layer is formed on the inner conductor (copper wire). First, the right angle head die of the conductor heater 6 side is inside. PW inserts π(4)' into the resin formulation shown in Table 2, and puts the resin into the material of the brother-extruder 4 3, and melts and kneads the resin, pressurizes the nitrogen gas from the foaming agent inlet 4, and injects the mixture into the second banquet 2 . The mixture of the second extruder 2 in-step melt-kneading was injected into the right-angle head die 7, and the device 8 and the puller 9 were used to obtain a foamed insulator containing the (four) conductor. The § 玄 foam insulation is used to eliminate the 敕 敕 ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 整 整 整 整 整 整 整 整 整 整 整 整 整 整 整 整 整 整 整Furthermore, the temperature between the first extruder 1 and the second extrusion 2 is set to 20 0t in the case of the case containing the tree wax formula and ZE_R1 , and the resin formula contains T〇pAS6〇i3s. The case of 〇4 is 215t, and the case where the resin formulation contains TGpAS6()15s_G4 is (10). In addition to the comparative example in which the high-density polyethylene monomer is used, the degree of foaming of the second m'% is set to be less than the case where the degree of foaming is not increased, and the degree of foaming is not increased. Here, a foamed insulator containing no internal conductor was obtained for measuring the relative dielectric constant. Next, the inner guide 22544-9752-PF of the right angle head die 7 on the side of the conductor heater 6 is turned on; the Ahddub 25 200915354 body insertion port is used, and the inner conductor 11 (copper wire) of the 1. 4 mni diameter is sent out by the conductor feeder 5. The conductor heater 6, the right angle head die 7, the cooling device 8, and the puller 9 are sequentially disposed. The mixture extruded under the same conditions as the pre-determined extrusion conditions of the foamed insulator is coated on the inner conductor 11 by the right-angle head die 7, and sequentially conveyed to the cooling device 8 and the puller 9 so that the bubble insulating layer is coated on the inner conductor. The outer diameter of the wire 1 of the 11 is adjusted to a draw speed of 4. 8 mm. After the adjustment, the wire 12 is taken up by the coiler. Thereafter, the electric wire 11 was covered with corrugated copper as an outer conductor, and further, a coaxial cable was obtained by coating the outer skin of polyethylene. The amount of attenuation of the resulting coaxial cable was measured. Further, the inner conductor 11 of the wire 12 was removed to measure the density of the foamed insulating layer, and it was confirmed that the foamed insulator was not the same as the foamed insulator which was produced by the same extrusion condition without being covered with the inner conductor. [Table 2] Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 TOPAS8007F-04 20 20 20 20 TOPAS6013S-04 20 TOPAS6015S-04 20 ZEONOR1060R 20 High density polyethylene 100 70 70 50 50 50 50 50 50 50 Low density polyethylene 30 30 30 30 30 30 30 Linear low density polyethylene 30 30 Foaming degree (« 40 80 80 80 85 90 80 80 80 85 Compressive strength (kPa) 855 720 660 950 920 837 948 948 952 911 Water penetration (g/m2 day atm) 0.6 0,66 0.66 0.49 0.49 0.51 0.48 0.49 0.48 0.48 Relative dielectric constant (1 GHz) 1.67 1.18 1.18 1.18 1.13 1. 09 1.18 1.18 1.18 1.13 Relative Dielectric Constant (1GHz) 1.67 1. 18 1.18 1.18 1.13 1.09 1.18 1.18 1.18 1.13 Relative Dielectric Constant (1GHz) 1.67 1.18 1.18 1.18 1.13 1.09 1.18 1.18 1.18 1.13 Attenuation (dB/100m) 73.9 25.5 24.2 23.5 18.0 12.5 22.0 23.5 23.5 18.7 Example 8 Example 9 Example 10 Example 11 Example 12 Example 13 Example 14 TOPAS8007F-04 50 30 30 30 30 20 15 High density polyethylene 50 20 20 40 50 50 55 Low Density Polyethylene 20 30 20 15 15 Linear Low Density Polyethylene 50 30 15 15 Foaming Degree (%) 80 80 80 80 80 80 80 Compressive Strength (kPa) 1180 917 920 981 1003 916 891 Moisture Penetration (g/m2. day . atm) 0.41 0.44 0.45 0.44 0.45 0.48 0.51 Relative dielectric constant (1GHz) 1.18 1.18 1. 18 1.18 1.18 1.18 1.18 Relative dielectric constant (1GHz) 1.18 1.18 1.18 1.18 1.18 1.18 1.18 2254 -9752-PF; Ahddub 26 200915354 Relative dielectric constant (1GHz) 1.18 I. 18 ιΤΤ8~η ^ 1.18 1.18 1.18 -----&quot;&quot;* 1.18 --------- Attenuation (dB /100m) 17.5 22.1 Γ 231''''' Γ 22.7 21.7 22.8 23.3 A.--- ------ From Table 2, it is confirmed that the application examples 1 to 14 and the degree of foaming are 8〇%~g(10) The range 'compressive strength is 800 (kpa) or more, the water penetration is below 55 (g/m2.day · atm), the relative dielectric constant is 12 〇, and the attenuation is 24 (dB/l 〇〇 _ ). Therefore, the coaxial iron wire of the embodiment 14 is suitable for a coaxial cable for high frequency. On the other hand, in Comparative Example i, which does not contain a cyclic olefin, the relative dielectric constant becomes high as the degree of foaming is low, and as a result, the amount of attenuation becomes large, and since the amount of water penetration is also high, it is confirmed that it is not suitable for high frequency use. Comparative Examples 2 and 3 which did not contain a cyclic olefin in the same manner as in Comparative Example i, due to the degree of foaming, although

Mtf «15' but the compression strength is small and cannot be used well for coaxial iron wires. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an extrusion device. Figure 2 is a diagram showing the main components of the coaxial cable manufacturing device. 2~2nd extruder; 4~foaming agent pressure inlet 6~conductor heating machine; 8~cooling device; 1 〇~coiling machine; 12~ wire. 27 卜 first extruder; 3~ hopper; 5~ conductor feeder; 7~ right angle head die; 9~ puller; 1 inner conductor; 2254-9752-PF; Ahddub

Claims (1)

200915354 X. Patent application scope: 1 · A coaxial cable, including insulation layer, 1 &gt; v, will contain 哀 浠 浠 浠 咼 resin, 咼 density polyethylene, low density decene and / or linear low The resin composition of the density polyethylene is foam-formed; the degree of foaming of the above-mentioned insulating layer is 80% to 90%. 2. The coaxial cable as claimed in the first aspect of the invention, wherein the resin composition contains the above-mentioned cyclic olefin-based tree, and the sap of 15% by mass, the above-mentioned density The total amount of the polyethylene and the low-density polyA ethylene and/or the linear low-density polyethylene is 70% by mass to 85% by mass. 3. The same-axis guide wire according to the second aspect of the invention, wherein the low-density polyethylene and/or the linear low-density polyethylene are contained in a total amount of from 40% by mass to 40% by mass. ‘·If the same as described in item i of the patent application scope, the attenuating strength of the above insulating layer is 8〇〇N/cm2 or more, and the bamboo shoots and gemstones are less than 24dB/100m. 5. The same (four) line as described in item i of the patent application, wherein the water permeability of the insulating layer is 〇·55g/m2.d or less. 6. The same (four) line as described in claim w, wherein the insulating layer ' has a relative dielectric constant of 1.20 or less in a frequency region from 1 GHz to 2. 7. If you apply for a patent scope! The above-mentioned (four)-line, wherein the above cyclic olefin-based resin is a copolymer of a cyclic olefin and an α-olefin or anhydrogenated product thereof. 8. The coaxial cable according to claim i, wherein the 2254-9752-PF/Ahddub 28 200915354 cyclic olefin resin has a relative dielectric constant of 2.3 or less in a frequency region of 1 GHz to 1 OGHz. The dielectric positive connection is 4x10" or less, and the bending elastic modulus at room temperature is 2. OGPa or more. 2254-9752-PF; Ahddub 29