JP2000021244A - Manufacture of insulating member for connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture an insulating member provided with an electric characteristic such as a low dielectric constant and a low dielectric loss tangent characteristic and suitable for small lot multi-production, by cutting a preform made of alicyclic structure-containing polymer resin after its molding. SOLUTION: A connector 2 for a coaxial able is provided with an insulating member 8 fixing a center conductor 4 and insulating it from an outer circumference conductor 6. The insulating member 8 is provided by molding a cylindrical preformed body and cutting it. The preformed body comprises a resin composition formed by mixing desirably at least one of soft polymer and crystalline polymer with an alicyclic structure-containing polymer resin and is obtained by extrusion molding. Subsequently, the preform is cut so as to be formed into a desired insulating member 8. In this process, the outer circumference is machined by means of a cutting tool using a lathe, and perforation is carried out by means of a drill. The obtained insulating member 8 is provided with a low dielectric loss tangent ranging 0.001-0.0001 and a low dielectric constant ranging 2.25-2.00 in a high frequency area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for manufacturing an insulating member for a connector, and more particularly to a method for manufacturing an insulating member for a connector by forming a specific preform and then cutting it.

[0002]

2. Description of the Related Art A connector is used to connect a cable for transmitting an electric signal in a separable manner. For example, a connector for a coaxial cable is usually used to electrically insulate two or more terminals. And an insulating member between the outer conductor and the center conductor.

[0003] In order to reduce the transmission loss and to increase the electric transmission speed, it is preferable that the insulating member has a small dielectric constant and a small dielectric tangent, especially a small dielectric tangent. Also, the smaller the voltage standing wave ratio (VSWR) and the larger the return loss value (dB), the smaller the reflection energy (reflection magnitude), which is excellent as an insulating material. For example, 1G
It is said that the voltage standing wave ratio is 1.20 or less that can be actually used at a frequency of not less than Hz.

Conventionally, polytetrafluoroethylene (PT)
FE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), polyethylpentene, and the like have been used as insulating members for connectors.

In particular, an insulating member using PTFE is 1M
The dielectric loss tangent in the range of 10 Hz to 10 MHz is as small as 0.0004 or less, and the dielectric constant is as small as 2.10 or less.
The voltage standing wave ratio in the range of MHz to 10 MHz is 1.20.
It can be as follows, and has excellent performance as an insulating member for a connector.

[0006] Such PTFE has a melt viscosity of 380 °.
About 10 in C¹¹-10¹²Poise and extremely high
General thermoplastic resin (melt viscosity at the time of molding is about 10³~ 1
0⁴ Extrusion molding and injection molding used in poise)
Is not applicable. For this reason, mass production is difficult,
Preformed body obtained by compression molding (rough molded product)
Is formed by cutting, and the connector insulation member (fine
Molded article).

On the other hand, an alicyclic structure-containing polymer resin such as a cycloolefin polymer has a small dielectric loss tangent at 1 MHz to 10 GHz of 0.0004 or less and a dielectric constant of 2.2.
Since it is as small as 5 or less and has excellent moldability, it has been studied to use a molded product obtained by injection molding of the molded product as it is as an insulating member for a connector (Japanese Patent Laid-Open No. 8-325440).
No.).

[0008]

The shape and size of the insulating member for a connector are appropriately selected depending on the shape, purpose and performance of the connector. If the shape, size, and the like conform to a predetermined standard size, there is no problem in terms of cost even if the alicyclic structure-containing polymer resin is mass-produced by injection molding or the like.

However, when the shape and size are special (for example, made to order) and deviate from a predetermined standard size, it may be more cost-effective to produce a small quantity as necessary. is there.

Further, when an insulating member for a connector is manufactured by injection molding of a polymer resin having an alicyclic structure, a gate mark remains, and it may not be used as an insulating member for a connector as it is.

The present invention has been made in view of such circumstances,
With various electrical characteristics such as low dielectric property, low dielectric tangent property,
An object of the present invention is to provide a method capable of efficiently manufacturing an insulating member for a connector suitable for multi-product small-quantity production.

[0012]

Means for Solving the Problems The present inventors have conducted intensive studies on a method for efficiently manufacturing an insulating member for a connector which is excellent in various electric characteristics and suitable for a large variety of small-quantity production. After molding a pre-formed body made of the formula structure-containing polymer resin, an insulating member obtained by cutting the pre-formed body has at least the same electrical characteristics as an insulating member made of a fluororesin such as PTFE, and They have found that they have the same machinability as PTFE, and have completed the present invention.

That is, the method for manufacturing an insulating member for a connector according to the present invention is characterized in that a preform formed of a polymer resin having an alicyclic structure is formed and then cut.

In the present invention, a resin composition obtained by blending an alicyclic structure-containing polymer resin with at least one polymer selected from the group consisting of a soft polymer and a crystalline polymer, preferably a soft polymer. A preform made of a product is particularly preferred. This is because the cutting workability is more excellent. Unlike the case of injection molding, no gate mark remains on the molded product, and no subsequent processing is required.

The amount of at least one polymer selected from the group consisting of a soft polymer and a crystalline polymer is not particularly limited, but is preferably based on 100 parts by weight of the alicyclic structure-containing polymer resin. 1 part by weight to 90 parts by weight, more preferably 5 parts by weight to 70 parts by weight, still more preferably 10 parts by weight
It is desirable that the amount be from 50 to 50 parts by weight. When the blending amount of the soft polymer or the crystalline polymer is in this range, further improvement in cutting workability can be expected.

Preferred examples of the soft polymer and the crystalline polymer will be described later.

The connector as "connector" in the present invention is not particularly limited, for example, which is using a cable for transmitting electrical signals as a terminal component for detachably connecting, the "shape", especially Not limited.

As such a “connector”, for example, a connector for coaxial cable (for example, JIS-C5
410, C5411, C5412, etc.), an RC232C connector of a personal computer for connecting a large number of conductors collectively, and an S terminal used for input / output of image information. Examples of the connector include a connector for a telephone line terminal and the like. Usually, in order to electrically insulate two or more terminals, an insulating member (corresponding to the connector insulating member according to the present invention) is provided between the outer conductor and the center conductor. )have.

Generally, there are two types of connectors, male and female, or plug and jack, each having a different shape. For example, in the case of a coaxial cable, the male-side center conductor usually protrudes from the insulating member, the female-side center conductor is located deep inside the through-hole at the center of the insulating member, and the male-side center conductor is , The center conductors come into contact with each other, the male-side center conductor is fixed by the through-hole of the female-side insulating member, and the male and female are fixed.
At this time, the outer conductors also come into contact with each other. In general, the outer conductors are in contact with each other so that the outer conductor of the outer conductor covering the outer side of the female insulating member is covered by the male outer conductor projecting from the insulating member. Be solid. In any case, the connectors are fixed to each other when the corresponding two types of male and female connection parts are combined, and the corresponding conductors are brought into contact with each other to be energized.

Usually, the conductor is connected to the conductor by soldering or the like, and another connector,
An electric circuit, an antenna, and the like are connected. However, the center conductor and the outer conductor of the connector are not always connected to the conductor. It is used only to secure the connectors, and may not be connected anywhere or may be directly connected to the circuit of the wiring board and the connector itself may be fixed on the wiring board .
In some cases, two male connection parts are integrated, and two male connection parts are integrated so that unconnectable males, females, or connectors of different shapes can be indirectly connected. In some cases, two types of connectors that are integrated or different from each other are integrated as a set of two types, and are not connected to a conductor.

The material of the center conductor and the outer conductor is not particularly limited as long as it has conductivity. For example, silver-plated brass, nickel-plated brass, silver-plated phosphor bronze, silver-plated perylium copper And gold-plated perylium copper.

Insulating Member for Connector The "shape" of the insulating member for a connector according to the present invention is appropriately selected depending on the shape, purpose, and performance of the connector.

The “insulating member for a connector” according to the present invention comprises:
When the value of the voltage standing wave ratio in the range of 2-3 GHz is 1.5
It is preferably 0 or less.

1 kHz to 20 kHz of the connector member of the present invention
The dielectric constant at kHz is usually 4.0 or less, preferably 3.0 or less, more preferably 2.5 or less, and the dielectric loss tangent is usually 0.010 or less, preferably 0.005 or less,
More preferably, it is 0.001 or less.

Preformed body The connector insulating member according to the present invention is manufactured by cutting the preformed body. That is, the “preformed body” in the present invention refers to a roughly formed product obtained by cutting a connector insulating member (finely formed product).

The term “cutting” in the present invention broadly means
This means performing work while cutting chips with a tool (such as a tool or drill), regardless of hand finishing or hand processing and various types of machining, in addition to cutting work in a narrow sense, as well as cutting and polishing. It means any processing such as. Such "cutting" includes, for example, punching, punching, drilling, boring, grinding, milling, planing, shaping,
Examples include rounding, sawing, tapping, threading, polishing, buffing, and the like, and these processes are usually performed using a lathe, milling machine, shaper, boring machine, drill, and the like. Done.

The “shape” of the preform in the present invention is:
Although not particularly limited, for example, various shapes such as a rod (column), a tube, a pipe, a sheet, a flat plate, and a block can be exemplified, and a rod is preferable as a preform for manufacturing an insulating member for a connector. The IZOD impact value is usually 3 kg · cm / cm or more, preferably 4 kg · cm / cm.
cm / cm or more, more preferably 5 kg · cm / cm or more, and the tensile strength at break is usually 350 kgf / cm ²
Or higher, preferably 400 kgf / cm ² or more, more preferably 450 kgf / cm ² or more, usually 1000k
gf / cm ² or less, and the tensile elongation at break is usually 45% or more, preferably 50% or more, more preferably 55% or more, and usually 100% or less.

The preform used in the present invention comprises at least one polymer selected from the group consisting of an alicyclic structure-containing polymer or, if necessary, a soft polymer and a crystalline polymer, a filler, It can be obtained by molding a molding material comprising a resin composition containing other polymers and other compounding agents.

The "forming method" of such a preform is not particularly limited, but it can be formed by, for example, injection molding, extrusion or the like, and is preferably extrusion. Although the melting temperature of the resin at the time of molding varies depending on the type of the alicyclic structure-containing polymer resin, it is usually from 100 ° C.
0 ° C., preferably 200 ° C. to 350 ° C.

The alicyclic structure-containing polymer resin The alicyclic structure-containing polymer resin used in the present invention has an alicyclic structure in a main chain and / or a side chain.
From the viewpoints of mechanical strength and heat resistance, those containing an alicyclic structure in the main chain are preferred.

Examples of the alicyclic structure of the polymer include a saturated cyclic hydrocarbon (cycloalkane) structure and an unsaturated cyclic hydrocarbon (cycloalkene) structure. From the viewpoints of mechanical strength, heat resistance and the like, A cycloalkane structure and a cycloalkene structure are preferred, and among them, those having a cycloalkane structure are most preferred.

The number of carbon atoms constituting the alicyclic structure is not particularly limited, but is usually 4 to 30, preferably 5 to 20.
When the number is in the range of 5 pieces, more preferably 5 to 15, the properties of mechanical strength, heat resistance and moldability are highly balanced and suitable.

The proportion of the repeating unit having an alicyclic structure in the alicyclic structure-containing polymer resin used in the present invention may be appropriately selected according to the purpose of use, but is usually 30% by weight or more. Preferably at least 50% by weight, more preferably 7% by weight.
0% by weight. If the proportion of the repeating unit having an alicyclic structure in the alicyclic structure-containing polymer resin is too small, the heat resistance is poor, which is not preferable.

The remainder other than the repeating unit having an alicyclic structure in the alicyclic structure-containing polymer resin is not particularly limited, and is appropriately selected depending on the purpose of use.

Specific examples of the polymer resin having an alicyclic structure include (1) a norbornene-based polymer, (2) a monocyclic olefin-based polymer, and (3) a cyclic conjugated diene-based polymer. And (4) vinyl alicyclic hydrocarbon polymers, and hydrogenated products thereof.

Among them, preferred are norbornene-based polymers and hydrogenated products thereof, cyclic conjugated diene-based polymers and hydrogenated products thereof, and more preferred are norbornene-based polymers and hydrogenated products thereof.

(1) Norbornene-based polymer The norbornene-based polymer is not particularly limited, and examples thereof include JP-A-3-14882 and JP-A-3-122.
No. 137, and the like. Specific examples thereof include a ring-opened polymer of a norbornene-based monomer and a hydrogenated product thereof, an addition polymer of a norbornene-based monomer, and a polymer of a norbornene-based monomer and a vinyl compound. Addition type polymers are exemplified.

Among them, hydrogenated ring-opening polymers of norbornene-based monomers, addition-type polymers of norbornene-based monomers, and copolymers with norbornene-based monomers can be used in order to highly balance heat resistance and dielectric properties. An addition type polymer of a vinyl compound is preferred, and a hydrogenated open polymer of a norbornene-based monomer is particularly preferred.

As the norbornene-based monomer, bicyclo
[2.2.1] Hept-2-ene (common name: norbornene)
), 5-methyl-bicyclo [2.2.1] hept-2
-Ene, 5,5-dimethyl-bicyclo [2.2.1]
Put-2-ene, 5-ethyl-bicyclo [2.2.1]
Hept-2-ene, 5-butyl-bicyclo [2.2.
1] Hept-2-ene, 5-ethylidene-bicyclo
[2.2.1] -Hept-2-ene, 5-hexyl-bishi
Black [2.2.1] hept-2-ene, 5-octyl-
Bicyclo [2.2.1] hept-2-ene, 5-octa
Decyl-bicyclo [2.2.1] hept-2-ene, 5
-Methylidene-bicyclo [2.2.1] hept-2-e
5-vinyl-bicyclo [2.2.1] hept-2-
Ene, 5-propenyl-bicyclo [2.2.1] hept
-2-ene, 5-methoxy-carbonyl-bicyclo
[2.2.1] Hept-2-ene, 5-cyano-bisic
B [2.2.1] hept-2-ene, 5-methyl-5-
Methoxycarbonyl-bicyclo [2.2.1] hept-
2-ene; 5-methoxycarbonylbicyclo [2.2.
1] Hept-2-ene, 5-ethoxycarbonylbisic
B [2.2.1] hept-2-ene, 5-methyl-5-
Methoxycarbonylbicyclo [2.2.1] hept-2
-Ene, 5-methyl-5-ethoxycarbonylbicyclo
[2.2.1] Hept-2-ene, bicyclo [2.2.
1] hept-5-enyl-2-methylpropionate,
Bicyclo [2.2.1] hept-5-enyl-2-methyl
Luoctaneate, bicyclo [2.2.1] hept-2-
Ene-5,6-dicarboxylic anhydride, 5-hydroxymethyl
Cylbicyclo [2.2.1] hept-2-ene, 5,6
-Di (hydroxymethyl) bicyclo [2.2.1] hept
To-2-ene, 5-hydroxy-i-propylbicyclo
[2.2.1] Hept-2-ene, 5,6-dicarboxy
Sibicyclo [2.2.1] hept-2-ene; 5-cia
Nobicyclo [2.2.1] hept-2-ene, bicyclo
[2.2.1] Hept-2-ene-5,6-dicarboxylic
Acid imide; tricyclo [4.3.1]^2,5. 0
^1,6] Deca-3,7-diene (common name: dicyclope
Antadiene), tricyclo [4.3.1]^2,5. 0
^1,6] Dec-3-ene; tricyclo [4.4.1]
^2,5. 0^1,6] Undeca-3,7-diene;
Licyclo [4.4.1^2,5. 0^1,6] Undeca
-3,8-diene; tricyclo [4.4.
1^2,5. 0^1,6] Undec-3-ene; 5-
Cyclopentyl-bicyclo [2.2.1] hept-2-
Ene, 5-cyclohexyl-bicyclo [2.2.1] f
Put-2-ene, 5-cyclohexenylbicyclo [2.
2.1] Hept-2-ene, 5-phenyl-bicyclo
[2.2.1] Hept-2-ene; tetracyclo [4.
4.1^2,5. 1^7,10. 0] -dodec-3-ene
(Also simply referred to as tetracyclododecene), 8-methyl
Toracyclo [4.4.1]^{2 , 5}. 1^7,10. 0]-
Dodeca-3-ene, 8-ethyltetracyclo [4.4.
1^2,5. 1^7,10. 0] -dodec-3-ene, 8
-Methylidenetetracyclo [4.4.1]^2,5. 1
^7,10. 0] -dodec-3-ene, 8-ethylidene
Toracyclo [4.4.1]^2,5. 1^7,10. 0]-
Dodeca-3-ene, 8-vinyltetracyclo [4.4.
1^2,5. 1^7,10. 0] -dodec-3-ene, 8
-Propenyl-tetracyclo [4.4.1^2,5. 1
^7,10. 0] -dodec-3-ene, 8-methoxycal
Bonyl tetracyclo [4.4.1 ^2,5.
1^7,10. 0] -dodec-3-ene, 8-methyl-8
-Methoxycarbonyltetracyclo [4.4.1
^2,5. 1^7,10. 0] -dodec-3-ene, 8-
Hydroxymethyltetracyclo [4.4.1]^2,5.
1^7,10. 0] -dodec-3-ene, 8-carboxy
Tetracyclo [4.4.1^2,5. 1^7,10. 0]
-Dodeca-3-ene; 8-cyclopentyl-tetracycl
B [4.4.1^2,5. 1^7,10. 0] -dodeca
3-ene, 8-cyclohexyl-tetracyclo [4.
4.1^2,5. 1^7,10. 0] -dodec-3-ene,
8-cyclohexenyl-tetracyclo [4.4.1
^2,5. 1^7,10. 0] -dodec-3-ene, 8-
Phenyl-cyclopentyl-tetracyclo [4.4.1
^2,5. 1^7,10. 0] -dodec-3-ene; tet
Lacyclo [7.4.1^10,13. 0^1,9. 0
^2,7] Trideca-2,4,6,11-tetraene
(1,4-methano-1,4,4a, 9a-tetrahydro
Fluorene), tetracyclo [8.4.1
^11,14. 0^{1 , 10}. 0^3,8] Tetradeca
3,5,7,12-tetraene (1,4-methano-1,
4,4a, 5,10,10a-Hexahydroanthrace
Pentacyclo [6.5.1)^1,8. 1
^3,6. 0^2,7. 0^9,13] Pentadeca-3,
10-diene, pentacyclo [7.4.1^3,6. 1
^{10, 13}. 0^1,9. 0^2,7] Pentadeca
4,11-diene; tetramer of cyclopentadiene;
Any norbornene-based monomer can be used. these
The norbornene monomers may be used alone or in combination.
These are used in combination.

The polymerization method and hydrogenation method of the norbornene monomer or the vinyl compound copolymerizable with the norbornene monomer are not particularly limited, and can be performed according to known methods.

Examples of the copolymerizable vinyl compound include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 3-methyl-1-butene, 3-methyl-1-pentene, and 3-ethyl- 1-pentene, 4-methyl-1-pentene, 4-methyl-1-hexene, 4,
4-dimethyl-1-hexene, 4,4-dimethyl-1-
Pentene, 4-ethyl-1-hexene, 3-ethyl-1
-Hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene and the like, ethylene or α-olefin having 2 to 20 carbon atoms; cyclobutene, cyclopentene, cyclohexene, 3,4-dimethylcyclopentene, 3-methylcyclohexene, 2- (2-methylbutyl) -1-cyclohexene, cyclooctene, 3a,
5,6,7a-tetrahydro-4,7-methano-1H-
Cycloolefins such as indene; non-conjugated dienes such as 1,4-hexadiene, 4-methyl-1,4-hexadiene, 5-methyl-1,4-hexadiene and 1,7-octadiene; These vinyl compounds can be used alone or in combination.
More than one species can be used in combination.

The ring-opening (co) polymer of a norbornene-based monomer is prepared by converting a norbornene-based monomer into a ruthenium, rhodium, palladium, osmium,
Iridium, a metal halide such as platinum, a nitrate or acetylacetone compound and a catalyst system comprising a reducing agent, or titanium, vanadium, zirconium, tungsten, a metal halide such as molybdenum or an acetylacetone compound, and an organic aluminum compound Using a catalyst system consisting of: in a solvent or without solvent, usually at a polymerization temperature of -50 ° C to 100 ° C, 0 kg / cm
It can be obtained by ring-opening (co) polymerizing at a polymerization pressure of ^{2 to} 50 kg / cm ² .

The catalyst system includes molecular oxygen, alcohol, ether, peroxide, carboxylic acid, acid anhydride, acid chloride,
By adding a third component such as an ester, ketone, nitrogen-containing compound, sulfur-containing compound, halogen-containing compound, molecular iodine, or other Lewis acid, the polymerization activity and the selectivity of ring-opening polymerization can be increased.

The hydrogenated norbornene-based polymer can be obtained by a conventional method in which a ring-opened (co) polymer is hydrogenated with hydrogen in the presence of a hydrogenation catalyst.

The addition copolymer of a norbornene-based monomer and a vinyl-based compound can be prepared, for example, by adding a monomer component in a solvent or without a solvent in the presence of a catalyst system comprising a titanium, zirconium, or vanadium compound and an organoaluminum compound. In general, it can be obtained by a method of copolymerizing at a polymerization temperature of −50 ° C. to 100 ° C. and a polymerization pressure of 0 kg / cm ^{2 to} 50 kg / cm ² .

(2) Monocyclic Cyclic Olefin Polymer Examples of the monocyclic cyclic olefin polymer include, for example, cyclolohexene, cycloheptene and cyclooctene disclosed in JP-A-64-66216. An addition polymer of a monocyclic cyclic olefin monomer can be used.

(3) Cyclic conjugated diene-based polymer As the cyclic conjugated diene-based polymer, for example, Japanese Unexamined Patent Publication No.
The cyclic conjugated diene-based monomers such as cyclopentadiene and cyclohexadiene disclosed in JP-A-136057 and JP-A-7-258318 are used as 1,2- or 1,2-
4-Polymerized polymers and hydrogenated products thereof can be used.

(4) Vinyl alicyclic hydrocarbon-based polymer Examples of the vinyl alicyclic hydrocarbon-based polymer include vinyl cyclohexene and vinyl cyclohexane disclosed in JP-A-51-59,989. Polymers of vinyl alicyclic hydrocarbon monomers and hydrogenated products thereof, JP-A-63-43910, JP-A-64-1,706
For example, a hydrogenated product of an aromatic ring portion of a polymer of a vinyl aromatic monomer such as styrene or α-methylstyrene disclosed in Japanese Patent Application Laid-Open Publication No. H10-15095 can be used.

The molecular weight of the alicyclic structure-containing polymer resin used in the present invention is appropriately selected according to the purpose of use.
The weight average molecular weight of the cyclohexane solution (toluene solution when the polymer resin does not dissolve) in terms of polyisoprene (polystyrene in case of toluene solution) measured by gel permeation chromatography is 5,000.
0 or more, preferably from 5,000 to 500,000, more preferably from 8,000 to 200,000, particularly preferably from 10,000 to 100,000,
The mechanical strength and the moldability are highly balanced and suitable.

The glass transition temperature (Tg) of the alicyclic structure-containing polymer resin used in the present invention may be appropriately selected according to the purpose of use, but is usually 50 to 350 ° C., preferably 70 to 300 ° C. When the temperature is in the range of 100 ° C, particularly preferably in the range of 100 to 250 ° C, the heat resistance and the moldability are highly balanced and suitable.

JIS of the alicyclic structure-containing polymer resin used in the present invention at 280 ° C. under a load of 2.16 kgf
The melt flow rate measured by -K6719 may be appropriately selected depending on the purpose of use.
g / 10 min. , Preferably 10 to 50 g / 10 mi
n. Is suitable. If the melt flow rate is too low, the temperature at which the molding material is heated at the time of molding becomes higher, so that processing may be difficult. If it is too high, molding defects such as burrs may occur at the time of molding.

Incidentally, these alicyclic structure-containing polymer resins can be used alone or in combination of two or more.

Soft Polymer In the present invention, the soft polymer to be added to the alicyclic structure-containing polymer resin generally means a polymer having a glass transition temperature of 30 ° C. or lower, and a plurality of Tg are present. Even in the case of a polymer or a polymer having both Tg and melting point (Tm), if the lowest Tg is 30 ° C. or lower, it is included in the soft polymer.

Examples of such a soft polymer include (a) an olefin-based soft polymer mainly composed of α-olefins such as ethylene and propylene, (b) an isobutylene-based soft polymer mainly composed of isobutylene, and (c) butadiene. , Diene-based soft polymers mainly composed of conjugated dienes such as isoprene, (d) cyclic olefin-based ring-opened polymers mainly composed of cyclic olefins such as norbornene and cyclopentene, (e) flexible polymers having a silicon-oxygen bond as a skeleton (Organic polysiloxane), (f) α, β-
A soft polymer mainly composed of unsaturated acids and their derivatives,
(G) a soft polymer mainly composed of an unsaturated alcohol and an amine or an acyl derivative or acetal thereof,
(H) a polymer of an epoxy compound, (i) a fluorine-based rubber,
(J) Other soft polymers and the like.

Specific examples of these soft polymers include, for example, (a): liquid polyethylene, atactic polypropylene, 1-butene, 4-methyl-1-butene, 1-butene,
Homopolymers such as hexene, 1-octene and 1-decene; ethylene / α-olefin copolymers, propylene /
Copolymers such as α-olefin copolymer, ethylene / propylene / diene copolymer (EPDM), ethylene / cyclic olefin copolymer, and ethylene / propylene / styrene copolymer are exemplified. Examples of (b) include polyisobutylene, isobutylene / isoprene rubber, and isobutylene / styrene copolymer. (C) is a homopolymer of a conjugated diene such as polybutadiene or polyisoprene; butadiene / styrene random copolymer, acrylonitrile / butadiene copolymer, hydrogenated acrylonitrile / butadiene copolymer, acrylonitrile / nibutadiene. Conjugated diene random copolymer such as styrene copolymer; butadiene / styrene / block copolymer, styrene / butadiene / styrene / block copolymer, isoprene / styrene / block copolymer, styrene / isoprene / styrene / block Examples include block copolymers of conjugated dienes and aromatic vinyl hydrocarbons such as copolymers, and hydrogenated products thereof. Examples of (d) include norbornene-based monomers such as norbornene, vinyl norbornene, and ethylidene norbornene, and metathesis ring-opened polymers of monocyclic olefins such as cyclobutene, cyclopentene, and cyclooctene, and hydrogenated products thereof. Examples of (e) include silicone rubbers such as dimethylpolysiloxane, diphenylpolysiloxane, and dihydroxypolysiloxane. As (f), a homopolymer of an acrylic monomer such as polybutyl acrylate, polybutyl methacrylate, polyhydroxyethyl methacrylate, polyacrylamide, or polyacrylonitrile; a mixture of an acrylic monomer such as butyl acrylate / styrene copolymer and another monomer And copolymers.
Examples of (g) include homopolymers of (esterified) unsaturated alcohols such as polyvinyl alcohol, polyvinyl acetate, vinyl polystearate, polyvinyl benzoate, and polyvinyl maleate; and vinyl acetate-styrene copolymers. Esterification) Copolymers of unsaturated alcohols with other monomers. Examples of (h) include polyethylene oxide, polypropylene oxide, epichlorohydrin rubber and the like. Examples of (i) include vinylidene fluoride rubber and ethylene tetrafluoride-propylene rubber. Examples of (j) include natural rubber, polypeptides, proteins, and polyester-based thermoplastic elastomers, vinyl chloride-based thermoplastic elastomers, and polyamide-based thermoplastic elastomers described in JP-A-8-73709.

These soft polymers may have a crosslinked structure or may have a functional group introduced by modification.

In the present invention, from the viewpoint of further improving the machinability, among the above soft polymers, (a)
(B) and (c) the soft polymers are particularly excellent in rubber elasticity,
It is preferable because of its excellent mechanical strength, flexibility and dispersibility. Among them, the diene-based soft polymer (c) is preferable, and the hydrogenated product of the diene-based soft polymer in which the carbon-carbon unsaturated bond of the conjugated diene bond unit is hydrogenated is more preferable. Specific examples of such a soft polymer include, for example,
Hydrogenated homopolymer such as polybutadiene, hydrogenated random copolymer such as butadiene / styrene copolymer; butadiene / styrene / block copolymer, styrene / butadiene / styrene / block copolymer, isoprene / isoprene Hydrogenated block copolymers such as styrene / block copolymers and styrene / isoprene / styrene / block copolymers;

In the present invention, the blending amount of the soft polymer in the alicyclic structure-containing polymer resin is determined within a range in which the machinability and the compatibility are suitably balanced, and the soft polymer and the crystalline polymer are mixed. The amount of the at least one polymer selected from the group consisting of the coalesced is not particularly limited, but is preferably 1 part by weight to 90 parts by weight, more preferably 100 parts by weight of the alicyclic structure-containing polymer resin. Is 5 to 70 parts by weight,
More preferably, the amount is 10 to 50 parts by weight. When the blending amount of the soft polymer or the crystalline polymer is in this range, further improvement in cutting workability can be expected.

Crystalline Polymer The crystalline polymer of the present invention is a polymer that can be crystallized and has a crystallinity of 20% as measured by an X-ray diffraction method.
That is all. Representative examples include polyesters, polyolefins, polyamides, and halogen-containing polymers. Of these, polyolefins are preferred in the present invention. The polyolefin is basically a polymer composed of carbon and hydrogen, but may be a polymer containing oxygen if necessary. Representative crystalline polyolefin polymers include polyethylene, polypropylene, polymethylpentene, polystyrene, polyphenylene oxide, polyoxymethylene, polypropylene oxide, polybutene, polymethylbutene, polymethylhexene, polyvinylcyclohexane, polyvinylnaphthalene, and polyxylene. In the case of the present invention, polyethylene and polypropylene are particularly preferred.

Filler The resin composition constituting the preform in the present invention includes:
By blending a filler, crack resistance can be improved.

Such fillers are not particularly limited, but fibrous fillers (eg, glass fiber, boron fiber, silicon carbide fiber, asbestos fiber, potassium titanate crystal fine fiber, quartz fiber, polyamide fiber, polyester fiber, etc.) ), Powdered fillers (eg, silica, diatomaceous earth, alumina, titanium oxide, magnesium oxide, pumice powder, pumice balloon, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, calcium carbonate,
Magnesium carbonate, dolomite, calcium sulfate, barium sulfate, calcium sulfite, talc, clay, mica, glass flakes, glass beads, calcium silicate, montmorillonite, bentonite, graphite,
Aluminum powder, molybdenum sulfide, antimony oxide, etc.). Such a filler may not be subjected to a surface treatment. However, it is preferable to use a filler which has been subjected to a surface treatment with a silane compound or the like, since moldability, mechanical strength and the like are improved.

Among these fillers, in order to improve crack resistance, it is preferable to use a fibrous filler or a mixture of a fibrous filler and a powdery filler. The use of a mixture is more preferred because of better moldability. Further, since it is blended into the alicyclic structure-containing polymer resin constituting the insulating member for a connector, it is preferable that the fibrous filler has excellent insulating properties.

The average thickness of the fibrous filler used in the present invention is usually 0.1 to 100 μm, preferably 0.2 to 50 μm.
μm, and the average fiber length is usually 5 μm to 20 m when applied to molding methods such as injection molding and extrusion molding.
m, preferably 10 μm to 10 mm, and usually 5 μm or more, preferably 10 μm or more when applied to a molding method such as a compression molding method. The average particle size of the powdered filler is 0.
The range is from 01 μm to 1 mm, preferably from 0.1 to 100 μm.

The mixing ratio of the filler is preferably 1 to 100 parts by weight, more preferably 5 to 80 parts by weight, based on 100 parts by weight of the alicyclic structure-containing polymer resin. If the compounding ratio of the filler is too small, the linear expansion coefficient is not sufficiently reduced, and the molded article molded in the presence of an insert having a linear expansion coefficient of 2.5 × 10 ⁻⁵ / ° C. or less has crack resistance. The effect of improving the properties cannot be obtained. On the other hand, if the compounding ratio is too large, the moldability is significantly impaired, which is not preferable.

When a fibrous filler and a powdery filler are mixed and used, the mixing ratio is 1:99 to 99: 1,
It is preferably in the range of 20:80 to 90:10, and more preferably in the range of 40:60 to 80:20. If the amount of the powdery filler used in the mixture is too small, the effect of improving the moldability cannot be obtained, and if the amount is too large, the moldability and mechanical strength are unfavorably deteriorated.

The alicyclic structure-containing polymer resin has a linear expansion coefficient of 6.0 × 10 ⁻⁵ / ° C. or more, usually 7.0 × 10 ^−5.
/ ° C or more, whereas the insulating member for a connector obtained by cutting a preform made of the alicyclic structure-containing polymer resin composition used in the present invention has a coefficient of linear expansion of 5.0 ×. 1
0 ⁻⁵ / ° C. or less, preferably 4.0 × 10 ⁻⁵ / ° C.
It becomes below.

Further, by adding a filler to the alicyclic structure-containing polymer resin, it is excellent in dimensional stability, low shrinkage and the like, and is suitable for molding requiring precision. For example,
Mold shrinkage of alicyclic structure-containing polymer resin is usually 0.7%
In contrast, the molding shrinkage of the alicyclic structure-containing polymer resin composition used in the present invention is 0.4% or less.

Other Compounds Other resins and other compounding agents can be added to the resin composition containing the alicyclic structure-containing polymer resin used in the present invention, if necessary.

The other compounding agents are not particularly limited as long as they are generally used in the resin industry. For example, phenol-based, phosphite-based, thioether-based antioxidants; hindered phenol-based compounds UV absorbers such as aliphatic alcohols, aliphatic esters, aromatic esters, triglycerides, fluorinated surfactants,
Release agents such as higher fatty acid metal salts; and other lubricants, anti-fogging agents, plasticizers, pigments, near infrared absorbers, antistatic agents, and the like. These compounding agents can be used alone or in combination of two or more. The amount of the compounding agent used is appropriately selected within a range that does not impair the scope of the present invention.

Molding Material The molding material used in the present invention has a metal element content of 5 ppm or less, preferably 4 ppm or less, more preferably 3 ppm or less.
These are: If the amount of the metal element is too large, the electrical properties of the molding material, such as the dielectric constant and the dielectric contact, deteriorate.

In order to obtain such a molding material, (1) When a soft polymer or a crystalline polymer is blended with an alicyclic structure-containing polymer resin having a small amount of a metal element, if necessary, (2) A molding material solution is prepared using a good solvent that dissolves all components of the molding material, and then treated with an adsorbent. After removing the metal element to precipitate the molding material in a poor solvent that does not dissolve all components of the molding material,
(3) A method of dissolving a molding material in a good solvent and precipitating it in a poor solvent is repeated. Even in the case of (1), generally, the alicyclic structure-containing polymer resin, the soft polymer, or the like is formed into a solution or treated with an adsorbent in a hydrogenation step or the like to remove the metal element, Dissolution and precipitation in a poor solvent are repeated to reduce the amount of metal elements. When an adsorbent is used, the adsorbent is not particularly limited, but may be SiO ₂ or Al such as synthetic zeolite, natural zeolite, activated alumina, and activated clay.
₂ O ₃ or a crystalline or amorphous mixed composition thereof is preferred, and the specific surface area is preferably 50 m ^2.
/ G or more, more preferably 100 m ² / g or more, particularly preferably 200 m ² / g or more, preferably 1000 m ² / g or more.
m ² / g or less, pore volume is preferably 0.5 cm ³
/ G or more, more preferably 0.6 cm ³ / g or more, particularly preferably 0.7 cm ³ / g or more, preferably 1.
Those having a density of 5 cm ³ / g or less are exemplified. If the specific surface area and the pore volume are too small, the adsorption capacity is poor, and if it is too large, the production becomes difficult.

The melt flow rate of the molding material used in the present invention measured at 280 ° C. under a load of 2.16 kgf according to JIS-K6719 may be appropriately selected according to the molding conditions, and is usually 0.1 to 100 g / 10 min. ,
Preferably 0.5 to 50 g / 10 min. Is suitable.

[0073]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a sectional view showing an embodiment of a connector having an insulating member obtained by the method of the present invention, FIG. 2 is a perspective view of the connector of FIG. 1, and FIG. FIG. 2 is a schematic perspective view showing an embodiment of the preform of FIG.

(1) Insulating Member for Connector In the present embodiment, the most common coaxial cable connector will be described as an example of the connector.

As shown in FIGS. 1 and 2, the coaxial cable connector 2 includes a center conductor 4 and an outer conductor 6 connected or connected to a center conductor and an outer conductor of a coaxial cable (not shown), respectively. It has an insulating member 8 (corresponding to a connector insulating member according to the present invention) for fixing the conductor 4 and insulating the center conductor 4 and the outer conductor 4.

The material of the center conductor 4 and the outer conductor 6 is not particularly limited. For example, stainless steel, silver-plated brass, nickel-plated brass, silver-plated phosphor bronze, silver-plated perylium copper, gold-plated perylium copper, etc. It consists of.

The center conductor 4 has an outer diameter of about 0.01 mm to 1 mm.
It is a hollow pin or a solid pin of about 0 mm.

The insulating member 8 has a shape obtained by combining cylinders or cylinders having different diameters with their central axes aligned, and a fitting recess 82 for fixing the center conductor 4 to the center thereof.
have. The central terminal 42 formed at one end of the central conductor 4 projects inside the fitting concave portion 82 while being retracted with respect to the outer peripheral terminal 62.

The outer periphery of the insulating member 8 has a diameter of preferably 1 mm to 100 mm, more preferably 3 mm to 75 m.
m, more preferably 5 mm to 50 mm.
In particular, in order to improve the dielectric constant characteristics in a high-frequency band, the insulating member 8 may be provided with a gap (not shown) other than the fitting concave portion 82 for fixing the center conductor.

Generally, as the cross-sectional area of the insulating member 8 cut at a right angle to the axial direction becomes larger, and as a higher frequency input wave is inputted, the reflected wave becomes larger, and the transmission loss becomes larger. From that point, it is more preferable that the insulating member 8 has a smaller cross-sectional area especially for a high frequency. However, if it is too small, the mechanical strength is inferior, and the connector is liable to be broken when connecting or disconnecting. In addition, the connector itself becomes smaller, which makes it difficult to use, for example, it is difficult to hold, so that stress is likely to be involved in connection and the like, and it is also easy to break.

In addition, when a gap (not shown) is removed from the insulating member 8, the insulating material having the same material, the same size, and the same shape generally has a higher voltage standing wave at a higher frequency as the volume ratio of the gap of the insulating member is larger. The ratio becomes smaller, and it can be used in higher frequency bands. However, if the gap is opened too much, the strength of the insulating member 8 decreases, and the insulating member 8 is easily damaged at the time of connecting a cable or the like. Therefore, it is desirable to provide a wall having a sufficient thickness between the gap and the gap, between the gap and the outer periphery, and between the gap and the fitting recess for fixing the central conductor.

(2) Method of Manufacturing Insulating Member for Connector As shown in FIG. 3, the insulating member for connector 8 according to the present invention is manufactured by forming a pre-formed body (roughly formed article) 30 having a predetermined shape. This can be obtained by cutting.

In this embodiment, the preform 30 is
For example, it is a column having a diameter of 2 mm to 200 mm. However, the shape is not limited to this, and the tube,
Various shapes such as a sheet, a flat plate, and a block can be used. It should be noted that the preformed body 30 does not require very strict accuracy, but if the surface accuracy of the preformed body 30 is extremely poor, it takes time and effort to improve the surface accuracy of the insulating member 8 after cutting. ,Caution must be taken.

The preform 30 in this embodiment is made of a resin composition obtained by blending at least one of a soft polymer and a crystalline polymer with an alicyclic structure-containing polymer resin. The blending amount of the soft polymer and the crystalline polymer with respect to 100 parts by weight of the contained polymer resin is in the range of 1 part by weight to 90 parts by weight. Such a preform 30 is, for example, using a molding device having an extruder,
It can be obtained by extrusion. The molding conditions can be appropriately selected.

The thus obtained preform 30 is cut. In this embodiment, the outer peripheral processing and the drilling of the preform 30 are performed by cutting, and the connector insulating member 8 can be obtained. The outer peripheral processing is performed by, for example, a cutting tool using a lathe, and the hole processing is performed, for example, by using a drill.

The thus obtained connector insulating member 8 according to the present invention has a dielectric loss tangent and dielectric constant in a high frequency range of 0.001 to 0.0001, 2.25 to 2.00,
Both are low, and the value of the voltage standing wave ratio in the range of 2-3 GHz is 1.20 or less, and all of the characteristics are excellent.

The present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the present invention.

[0089]

EXAMPLES Hereinafter, the present invention will be described based on more detailed examples, but the present invention is not limited to these examples.
In the following description, parts or% are based on weight unless otherwise specified.

(1) The physical properties of the resin were measured and calculated by measuring the molecular weight, molecular weight distribution, main chain hydrogenation rate and aromatic ring hydrogenation rate (nuclear hydrogenation rate), glass transition temperature, specific gravity, and melt flow rate. Here, the molecular weight was measured by GPC using cyclohexane as a solvent, and the weight average molecular weight (Mw) in terms of standard polyisoprene was determined. The molecular weight distribution is measured by GPC using cyclohexane as a solvent, the weight average molecular weight (Mw) and the number average molecular weight (Mn) in terms of standard polyisoprene are determined, and the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) (Mw / Mn) was calculated. The main chain hydrogenation rate and the aromatic ring hydrogenation rate (nuclear hydrogenation rate)
^It was measured by ¹ H-NMR. The glass transition temperature is JI
A value measured by a differential scanning calorimeter (DSC) based on S-K7121. Specific gravity is JIS-K7112-
It was measured based on Method A. Melt flow rate is JI
280 ° C, 2.16 kg based on S-K6719
The measurement was performed with a load of f.

(2) The physical properties of the soft polymer are determined by measuring the glass transition temperature with a differential scanning calorimeter (DSC).

(3) The physical properties of the crystalline polymer are defined as values of crystallinity measured by an X-ray diffraction method.

(4) The physical properties of the resin composition were measured by measuring the melt flow rate.

(5) The cutting workability is such that a metal drill having a diameter of 1 mm is used and the hole diameter does not change due to the load at the time of cutting on the cutting plane portion of the preformed rod having a diameter of 10 mm and a length of 10 mm. The time required to penetrate the hole at the cutting speed was measured. The shorter this time is, the more excellent the machinability is.

(6) The electrical characteristics were evaluated by measuring the values of dielectric constant, dielectric loss tangent, and voltage standing wave ratio.

Here, the dielectric constant and the dielectric loss tangent are based on JIS.
-Measured at a frequency of 1 MHz according to K-6911. The voltage standing wave ratio is a value measured according to 5.6 of JIS-C-5402.

(7) The mechanical strength was evaluated by measuring tensile strength at break, tensile elongation at break, and IZOD impact value. Here, the tensile breaking strength / tensile breaking elongation is based on JIS-K-7.
The value is measured according to 113. The IZOD impact value is a value measured according to JIS-K-7110.

Reference Example 1 A reaction vessel charged with 258 liters of cyclohexane was charged with bicyclo at room temperature under a nitrogen stream.
[2.2.1] Hept-2-ene (hereinafter abbreviated as NB) (1
18 kg) and stirred for 5 minutes. Further, triisobutylaluminum was added so that the concentration in the system became 1.0 ml / liter. Subsequently, ethylene was circulated at normal pressure while stirring to make the inside of the system an ethylene atmosphere. The internal temperature of the autoclave was maintained at 70 ° C., and pressure was applied with ethylene so that the internal pressure became a gauge pressure of 6 kg / cm ² .
After stirring for 10 minutes, 5.0 liter of a toluene solution containing isopropylidene (cyclopentadienyl) (indenyl) zirconium dichloride and methylalumoxane prepared in advance is added to the system, thereby causing a copolymerization reaction of ethylene and NB. Was started. The catalyst concentration at this time is 0.015 mmol / l for isopropylidene (cyclopentadienyl) (indenyl) zirconium dichloride and 7.5 mmol / l for methylalumoxane with respect to the whole system.

During the polymerization, ethylene was continuously fed into the system to raise the temperature to 70 ° C. and the internal pressure to 6 kg / g.
cm ² . After 60 minutes, the polymerization reaction was stopped by adding isopropyl alcohol. After depressurizing,
The polymer solution was taken out, then water 1 m ³ to an aqueous solution of concentrated hydrochloric acid was added 5 l 1: contacting under vigorous stirring at a rate of 1, and the catalyst residues were transferred to the aqueous phase. After the contact mixture was allowed to stand, the aqueous phase was separated and removed, and further washed twice with water to purify and separate the polymerization liquid phase. Next, the polymer solution purified and separated is brought into contact with three times the volume of acetone under vigorous stirring to precipitate a copolymer, and then a solid portion (copolymer) is obtained.
Was collected by filtration and washed thoroughly with acetone. Further, in order to extract unreacted monomers present in the polymer, this solid portion was poured into acetone so as to be 40 kg / m ^3, and then an extraction operation was performed at 60 ° C. for 2 hours. After the extraction treatment, a solid portion was collected by filtration, and dried at 130 ° C. and 350 mmHg for 12 hours under a nitrogen flow to obtain an ethylene / NB copolymer.

The ethylene / N obtained as described above
The B copolymer has a number average molecular weight (Mn) of 39,000,
Weight average molecular weight (Mw) is 95,000, Tg is 140
° C, specific gravity 1.02, NB content 53 mol%, melt flow rate of this resin is 15 g / 10 min. Met.

[Reference Example 2] 1 m provided with a stirring blade³Polymerizer
A cyclohexane solution of TCD is placed in the polymerization vessel from above.
Supply concentration of TCD is 60 kg / m³So that
Were continuously fed. In addition, from the top of the polymerization vessel
VO (OC₂H₅) Cyclohexane of Cl2
When the vanadium concentration in the polymerization vessel was 0.9 mol /
 m³So that ethyl aluminum
Lido (Al (C₂H₅)_1.5 Cl_1.5)
The chlorohexane solution was used to reduce the aluminum concentration in the polymerization vessel to 7.
2mol / m³In the polymerization vessel so that
Supplied continuously. Also, using a bubbling tube for the polymerization system
85 m of styrene³/ Hour, 45 m2 of nitrogen³/Time
Between, 6m of hydrogen³/ Hour. Outside the polymerization vessel
Polymerization by circulating a heating medium through a jacket attached to
The copolymerization reaction was carried out while maintaining the system at 10 ° C. Above
Polymerization solution of copolymer formed by polymerization reaction
From the top, the polymerization liquid in the polymerization vessel is always 1m³To be
(Ie, so that the average residence time is 0.5 hours)
Extracted continuously. To the extracted polymerization solution, add
Hexane / isopropyl alcohol (1: 1) mixture
The polymerization reaction was stopped by addition. Then 1m of water³
Aqueous solution containing 5 liters of concentrated hydrochloric acid
Contact with strong stirring to transfer the catalyst residue to the aqueous phase.
Was. After allowing this contact mixture to stand, the aqueous phase is separated and removed.
Then, washing with water was performed twice, and the polymerization liquid phase was purified and separated.
Next, the purified and separated polymerization solution was mixed with three times the amount of acetone.
After contacting with stirring to precipitate the copolymer, the solid
(Copolymer) is collected by filtration and washed thoroughly with acetone
did. In addition, unreacted monomers present in the polymer
To extract 40 kg / m³Becomes
Condition at 60 ° C for 2 hours after pouring into acetone
The extraction operation was performed. After the extraction treatment, the solid part is filtered.
The sample was collected and 12 at 130 ° C and 350 mmHg under nitrogen flow.
Dried for hours.

As described above, the obtained ethylene / T
The CD copolymer has a number average molecular weight (Mn) of 45,000.
0, weight average molecular weight (Mw) 78,000, Tg 1
40 ° C., specific gravity 1.02, TCD content 31 mol%,
The melt flow rate of this resin is 28 g / 10 min.
Met.

Reference Example 3 In a nitrogen atmosphere, 0.56 parts by weight of 1-hexene, 0.11 part by weight of dibutyl ether and 0.22 part by weight of triisobutylaluminum were added to 500 parts by weight of dehydrated cyclohexane at room temperature in a reactor. After mixing in the flask, keep the mixture at 45 ° C
[4.4.0.1 ^2,5 . [ ^7,10 ] 200 parts by weight of dodeca-3-ene (hereinafter abbreviated as MTCD) and 30 parts by weight of a toluene solution of 0.70% by weight of tungsten hexachloride in 2 parts
It was added continuously over time and polymerized.

Next, the polymerization reaction solution was transferred to a pressure-resistant hydrogenation reactor, and 10 parts by weight of a diatomaceous earth-supported nickel catalyst (manufactured by Nissan Gardler Co., nickel loading rate: 58% by weight) was added.
The reaction was performed at 80 ° C. and a hydrogen pressure of 45 kgf / cm ² for 10 hours. This solution was filtered using a filter equipped with a stainless steel wire mesh using diatomaceous earth as a filter aid to remove the catalyst. The obtained reaction solution was poured into 3000 parts by weight of isopropyl alcohol with stirring to precipitate a hydrogenated product,
It was collected by filtration. Further, after washing with 500 parts by weight of acetone, the product was dried for 48 hours in a reduced-pressure drier set at 100 ° C. or lower at 1 torr or less, and hydrogenated ring-opening polymer 190
Parts by weight were obtained.

The hydrogenated MTCD ring-opened polymer obtained had a main chain hydrogenation rate of 99.9% and a number average molecular weight (Mn).
Is 20,400, and the weight average molecular weight (Mw) is 41,
200, molecular weight distribution (Mw / Mn) was 2.02. The melt flow rate at 280 ° C. is 20 g /
10 min. The glass transition temperature was 140 ° C. and the specific gravity was 1.01.

Example 1 A hydrogenated styrene-ethylene-propylene-styrene block copolymer rubber (Septon 2023, 100 parts by weight) was added to 100 parts by weight of the ethylene / NB copolymer prepared in Reference Example 1.
Kuraray Co., Ltd., number average molecular weight 60,000, Tg is at least 30 ° C or less, and the amount of metal element is about 15
ppm) 30 parts by weight, 250 ° C under nitrogen atmosphere
C. The mixture was kneaded by a twin screw extruder to prepare pellets. The melt flow rate of the pellet was 1 g / 10 min.
Met. A preform was extruded from the pellets using an extruder having a screw diameter of 37 mm at a barrel temperature of 210 ° C., an adapter temperature of 240 ° C., and a screw rotation speed of 25 rpm. The obtained preform had a diameter of 10 mm as shown in FIG.

This rod was cut into a predetermined length, and the characteristics of the following items were evaluated.

(1) Mechanical strength The obtained preform was molded into test pieces conforming to the respective tests, and various strength properties were measured. The tensile strength at break was 500 kgf / cm ² , The elongation is 160% and the IZOD impact value is 20.0 kg
f / cm ² .

(2) Cutting workability The cutting workability of the obtained preform was evaluated.
It took 2.1 seconds and good results were obtained. As described above, the obtained preformed body was subjected to outer peripheral processing using a cutting machine, and was further subjected to hole processing using a cutting machine equipped with a metal drill to obtain an insulating member for a connector. The total time required for these processes was 1.5 minutes.

(3) Electrical Characteristics The obtained insulating member for a connector had a dielectric constant of 2.21, a dielectric loss tangent of 0.0005, and a voltage standing wave ratio of 1.11. Electrical properties were obtained.

Example 2 The procedure of Example 1 was repeated, except that the ethylene / NBC copolymer prepared in Reference Example 2 was used instead of the ethylene / NB copolymer prepared in Reference Example 1. It was pelletized to obtain a preform. The melt flow rate of the pellets at this time was 2 g / 10 min. Met.

(1) Mechanical strength The obtained preform was molded into test pieces conforming to the respective tests, and various strength properties were measured. The tensile strength at break was 600 kgf / cm ² , The elongation is 160% and the IZOD impact value is 21.0kg
f / cm ² .

(2) Machinability When the machinability of the obtained preform was evaluated, it was found that the hole was satisfactorily penetrated into the cut plane part of the rod.
It took 2.0 seconds and good results were obtained. As described above, the obtained preformed body was subjected to outer peripheral processing using a cutting machine, and was further subjected to hole processing using a cutting machine equipped with a metal drill to obtain an insulating member for a connector. The total time required for these processes was 1.6 minutes.

(3) Electrical Characteristics The obtained insulating member for a connector had a dielectric constant of 2.22, a dielectric loss tangent of 0.0005, and a voltage standing wave ratio of 1.15. Electrical properties were obtained.

Example 3 The procedure of Example 1 was repeated except that the hydrogenated ring-opening polymer prepared in Reference Example 3 was used instead of the ethylene / NB copolymer prepared in Reference Example 1. It was pelletized to obtain a preform. The melt flow rate of the pellets at this time was 4 g / 10 min. Met.

(1) Mechanical strength The obtained preform was molded into test pieces conforming to the respective tests, and various strength properties were measured. The tensile strength at break was 680 kgf / cm ² , The elongation is 190% and the IZOD impact value is 21.0kg
f / cm ² .

(2) Machinability When the machinability of the obtained preformed body was evaluated, it was found that the hole was satisfactorily penetrated into the cut plane part of the rod.
It took 2.0 seconds and good results were obtained. As described above, the obtained preformed body was subjected to outer peripheral processing using a cutting machine, and was further subjected to hole processing using a cutting machine equipped with a metal drill to obtain an insulating member for a connector. The total time required for these processes was 1.5 minutes.

(3) Electrical Characteristics The obtained insulating member for a connector had a dielectric constant of 2.15, a dielectric loss tangent of 0.0004, and a voltage standing wave ratio of 1.10. Electrical properties were obtained.

Example 4 Hydrogenated styrene-ethylene-propylene-of Example 1
In place of the styrene-block copolymer rubber, 20 parts by weight of polyethylene having a crystallinity of 30% was blended, and the others were pelletized in the same manner as in Example 1 to obtain a preform.
The melt flow rate of the pellets at this time was 3 g / 10
min. Met.

(1) Mechanical strength The obtained preform was molded into test pieces conforming to the respective tests, and various strength properties were measured. The tensile strength at break was 490 kgf / cm ² , The elongation is 148% and the IZOD impact value is 18.0 kg
f / cm ² .

(2) Machinability When the machinability of the obtained preformed body was evaluated, it was found that the hole was satisfactorily penetrated into the cut plane part of the rod.
It took 2.2 seconds and good results were obtained. As described above, the obtained preformed body was subjected to outer peripheral processing using a cutting machine, and was further subjected to hole processing using a cutting machine equipped with a metal drill to obtain an insulating member for a connector. The total time required for these processes was 1.6 minutes.

(3) Electrical Characteristics The obtained insulating member for a connector had a dielectric constant of 2.20, a dielectric loss tangent of 0.0005, and a voltage standing wave ratio of 1.12. Electrical properties were obtained.

Example 5 Hydrogenated styrene-ethylene-propylene-styrene.
Pelletization was performed in the same manner as in Example 1 except that the block copolymer rubber was not added to obtain a preform.
The melt flow rate of the pellets at this time was 15 g / 1.
0 min. Met.

(1) Mechanical strength The obtained preform was molded as a test piece conforming to each test, and various strength physical properties were measured. The tensile strength at break was 450 kgf / cm ² , The elongation is 63% and the IZOD impact value is 5.9 kgf /
cm ² .

(2) Machinability When the machinability of the obtained preform was evaluated, it was found that the hole was satisfactorily penetrated into the cut plane part of the rod.
It took 2.3 seconds and good results were obtained. As described above, the obtained preformed body was subjected to outer peripheral processing using a cutting machine, and was further subjected to hole processing using a cutting machine equipped with a metal drill to obtain an insulating member for a connector. The total time required for these processes was 1.8 minutes.

(3) Electrical Characteristics The obtained insulating member for a connector had a dielectric constant of 2.19, a dielectric loss tangent of 0.0005, and a voltage standing wave ratio of 1.11. Electrical properties were obtained.

Comparative Example 1 A pellet was obtained in the same manner as in Example 1.

The pellets were molded at a mold temperature of 80 ° using an injection molding machine of product number IS450 manufactured by Toshiba Machine Co., Ltd.
C, cylinder temperature 270 ° C, nozzle temperature 300 °
C, injection pressure 60 kgf / cm ² , holding pressure 40 kgf / c
m ² , mold clamping pressure 80 t / cm ² , injection speed 30 cm ³
/ S, a screw back pressure of 20 kgf / cm ² , and a screw rotation speed of 25 rpm were injection molded to obtain a connector insulating member corresponding to the insulating member 8 in FIG.

The dielectric constant of the obtained connector insulating member is as follows:
It was 2.20, the dielectric loss tangent was 0.0005, and the voltage standing wave ratio was 1.12. It was confirmed that there was no difference in electrical characteristics from the cut products of Examples 1 to 5. Was done.

Comparative Example 2 A fine powder for PTFE molding having an average particle diameter of 25 μm (product number: Polyflon M12 manufactured by Daikin Industries, Ltd.) was pre-molded using a compression molding machine at a preforming pressure of 200 kg / cm ² and a holding time of 1 hour.
Formed at 25 ° C. for 0 minutes to obtain a pre-formed rod, which was baked in an electric furnace at 370 ° C. for 15 hours to obtain a pre-formed body in the form of a rod (column) having a diameter of 10 mm as shown in FIG. I got

(1) Mechanical strength Under the same conditions as those in which the rod-shaped preformed body was obtained, test pieces conforming to the respective tests were separately formed, and various strength physical properties were measured. , 550k
gf / cm ² , the tensile elongation at break is 72%,
The IZOD impact value was 17.5 kgf / cm ² .

(2) Machinability When the machinability of the obtained preform was evaluated, it was found that the hole was satisfactorily penetrated into the cut plane part of the rod.
It took 6.5 seconds, and significantly longer than Examples 1 to 5. As described above, the obtained preformed body was subjected to outer peripheral processing using a cutting machine, and was further subjected to hole processing using a cutting machine equipped with a metal drill to obtain an insulating member for a connector. The total time required for these processings was 5.3 minutes, which was significantly longer than Examples 1 to 5.

(3) Electrical Characteristics The obtained insulating member for a connector had a dielectric constant of 2.11, a dielectric loss tangent of 0.0003, and a voltage standing wave ratio of 1.10. Electrical properties were obtained.

Table 1 shows various characteristics of the obtained insulating member for a connector.

[0135]

[Table 1]

Consideration As shown in the comparison between Examples 1 to 5 and Comparative Example 1, it was confirmed that there was no difference in electrical characteristics between the cut product and the injection molded product.

As shown in the comparison between Examples 1 to 5 and Comparative Example 2, the connector insulating members of Examples 1 to 5 have almost the same electrical characteristics as the connector insulating member of Comparative Example 2. And it was extremely excellent in cutting workability while maintaining mechanical strength.

[0138]

According to the method of the present invention, it is possible to provide an insulating member for a connector which has various electric characteristics equal to or higher than that of a fluororesin and is particularly excellent in cutting workability.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a connector having an insulating member obtained by a method of the present invention.

FIG. 2 is a perspective view of the connector of FIG.

FIG. 3 is a schematic perspective view showing one embodiment of a preform for obtaining the connector insulating member of FIG. 1;

[Explanation of symbols]

 2: Connector for coaxial cable 4: Central conductor 42: Central terminal 6: Peripheral conductor 62: Peripheral terminal 8: Insulating member 82: Fitting recess 30: Preformed body

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29K 105: 34

Claims (2)

[Claims] 1. A method of manufacturing an insulating member for a connector, comprising forming a preformed body made of a polymer resin having an alicyclic structure, followed by cutting. 2. A preform formed from a resin composition obtained by blending at least one polymer selected from the group consisting of a soft polymer and a crystalline polymer with an alicyclic structure-containing polymer resin. A method of manufacturing an insulating member for a connector, characterized by performing a cutting process thereafter.