JPH07302535A - Insulating material composition for extinguishing arc and insulating material formed body for extinguishing arc and arc extinguishing apparatus using them - Google Patents

Abstract

PURPOSE:To improve current limiting and shutting function and make an arc extinguishing apparatus compact by using a composition containing matrix resin with a prescribed composition containing at least one of glass fibers, inorganic minerals, and ceramic fibers with prescribed compositions as a filler. CONSTITUTION:An insulating material composition for extinguishing an arc is used, the composition contains filler materials of at least one of glass fibers, inorganic minerals, and ceramic fibers with not more than 1% of the total contents of compounds of group 1A metals in a periodic table and contains one compound as a main component of a matrix resin selected from polyolefines, polyolefine-based copolymers, polyamides, polyamide-based polymer blends, polyacetals, and polyacetal-based polymer blends. In an arc extiguishing apparatus 8, a movable contact point 4 is formed in the opening or closing side of a movable contactor 3 which opens or closes while having a movable center 2 as a fulcrum. A fixed contact point 5 is formed at the position corresponding to the contact point 4 in one end of a fixed contactor 6. An insulating material 2 is so as installed to surround the circumferences of the contact points 4, 5. The above mentioned composition is used for the insulating material 2.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an arc extinguishing insulating material composition, an arc extinguishing insulating material molded article, and an arc extinguishing apparatus using the same. More specifically, an arc-extinguishing device, such as a circuit breaker, a current limiter or an electromagnetic contactor, in which an arc is generated in the container when the current is cut off, an arc-extinguishing insulating material composition, and an arc-extinguishing insulating material. Regarding a molded body.

[0002]

2. Description of the Related Art In a circuit breaker, a fault current limiter, an electromagnetic contactor, etc., when a contact of a movable contact and a contact of a fixed contact are opened when an excessive current or a rated current is applied, an arc is generated between them. Occur. In order to extinguish the arc, as shown in FIG. 14, the insulator (1) 1 is formed around the arc 9 generated between the movable contact of the movable contact 3 and the fixed contact 5 of the fixed contact 6. And an arc extinguishing device provided with an insulator (2) 2 is used. In addition, 7 is a movable contact.

A pyrolysis gas is generated by the arc 9 from the insulator (1) 1 and the insulator (2) 2 of the arc extinguishing device 8, and the arc 9 is cooled and extinguished by the pyrolysis gas.

Regarding the arc-extinguishing device and the arc-extinguishing insulating material used in the arc-extinguishing device, see Japanese Patent Application Laid-Open No. 63-126136.
JP, JP-A-63-310534, JP-A-64
-77811, Japanese Unexamined Patent Publication No. 2-144811, Japanese Unexamined Patent Publication No. 2-256110, and the like.

For example, in Japanese Patent Laid-Open No. 63-126136, polymethylpentene, polybutylene or polymethylmethacrylate containing glass fibers in an amount of 5 to 35% (%,
The same applies hereinafter), an arc extinguishing device using an insulating material contained therein is disclosed. Since polymethylpentene, polybutylene, or polymethylmethacrylate generates a large amount of hydrogen gas, and hydrogen gas has good thermal conductivity, it has a large quenching effect.

Further, in JP-A-63-310534, an acrylic acid ester copolymer, an aliphatic hydrocarbon resin, polyvinyl alcohol, polybutadiene, polyvinyl acetate, polyvinyl acetal, isoprene resin, ethylene-propylene rubber, ethylene. -Vinyl acetate copolymer or polyamide resin with 5 to 35 glass fibers
%, The insulating material contained is described.

Further, Japanese Patent Laid-Open No. 64-77811 discloses a polymethylpentene in which hydrogen generated by high frequency heating at 764 ° C. for 1 second in a nitrogen atmosphere has a hydrogen content of 2.5 × 10 ^-2 ml / mg or more. And insulating materials such as melamine resins are described.

Further, JP-A-2-144811 discloses an insulating material such as a melamine resin containing ε-caprolactam and aluminum hydroxide, and further a melamine resin containing a terminal amine type imide compound. In JP-A 2-256110, in addition to a melamine resin containing ε-caprolactam and aluminum hydroxide, a melamine resin containing glass fiber or an epoxy resin and ε-caprolactam, aluminum hydroxide,
Insulating materials such as melamine resins containing at least two of glass fibers and epoxy resins are described.

[0009]

In order to reduce the size of the arc extinguishing device 8 and to improve the current limiting interruption performance, the insulator (1) 1 for covering the contact portion for generating an arc, or the contact at the time of opening and closing. It is effective to use the insulator (2) 2 arranged on both sides of the plane including the locus of or of the contact portion. At this time, it is necessary to improve the arc extinguishing performance of the insulator (1) 1 and the insulator (2) 2.

When the cross-sectional area of the movable contact or the fixed contact is reduced as compared with the conventional one for the purpose of downsizing the arc-extinguishing device 8, the electric resistance value of the movable contact or the fixed contact increases, so that when the current is applied. The temperature of the contact part and its surroundings rises more than before. Therefore, the insulators (1) 1 and (2) 2 are required to have heat resistance higher than conventional ones.

If the width W of the insulator (2) 2 is reduced from the conventional one for the purpose of downsizing the arc-extinguishing device 8, the distance between the plane including the locus of the contacts at the time of opening and closing and the insulator (2) 2. And the pressure of the pyrolysis gas generated by the arc from the insulator (2) 2 becomes higher than in the conventional case. Therefore, the insulators (1) 1 and (2) 2 are required to have a pressure resistance higher than conventional ones.

Further, the distance between the plane including the locus of the contact at the time of opening and closing and the insulator (2) becomes closer, and the arc of the insulator (2) is greatly consumed. Therefore, the arc wear resistance of the insulator (2) is increased. Improvement (specifically, no holes) is required.

When the above-mentioned conventional insulator using a melamine resin or a modified melamine resin as a matrix or a melamine-phenol type insulator is used, heat from the insulator is generated due to high arc heat generated when the movable contact is opened. Decomposition gas is generated, and the thermal decomposition gas increases the pressure around the contact, which causes a problem that the insulator (1) and the insulator (2) are insufficient in pressure resistance and are cracked.

Further, when the arc extinguishing device is downsized and the distance between the contact and the insulator (2) is shortened, it is necessary to increase the amount of the filler in order to improve the arc wear resistance of the insulator (2). However, when C glass containing 8% sodium oxide and 1% potassium oxide or A glass containing 15% sodium oxide is used as a filler, there is a problem that arc extinguishing performance is deteriorated.

If a heat-resistant thermoplastic resin containing a large amount of aromatic rings is used in the arced portions of the insulator (1) and the insulator (2) of the arc extinguishing device 8, the heat resistance is improved, but the arc 9 causes There is a problem that the surfaces of the insulator (1) and the insulator (2) are carbonized, and free carbon is scattered around to cause insulation failure.

The present invention is free from the problems found in the above-mentioned prior art and is excellent in arc extinguishing performance, heat resistance, pressure resistance, arc wear resistance, etc., arc-extinguishing insulating material composition, arc-extinguishing insulating material molded article. And it aims at providing the arc-extinguishing device using them.

[0017]

The arc-extinguishing insulating material composition according to claim 1 is a glass fiber having a total content of compounds of metals of Group 1A of the periodic table of 1% or less, and metals of Group 1A of the periodic table. Containing at least one filler selected from the group consisting of an inorganic mineral having a total content of compounds of 1% or less and a ceramic fiber having a total content of compounds of metals of Group 1A of the periodic table of 1% or less. However, the main component of the matrix resin is one selected from the group consisting of polyolefins, polyolefin-based copolymers, polyamides, polyamide-based polymer blends, polyacetals and polyacetal-based polymer blends.

The arc-extinguishing insulating material composition according to claim 2 is
In the arc-extinguishing insulating material composition according to claim 1, the inorganic mineral is calcium carbonate, wollastonite or hydrous magnesium silicate.

The arc-extinguishing insulating material composition according to claim 3 is
In the arc-extinguishing insulating material composition according to claim 1, the ceramic fibers are aluminum silicate fibers, aluminum borate whiskers or alumina whiskers.

The arc-extinguishing insulating material composition according to claim 4 is
In the arc-extinguishing insulating material composition according to claim 1, 2 or 3, the polyolefin is polypropylene or polymethylpentene.

An arc extinguishing insulating material composition according to claim 5 is
In the arc-extinguishing insulating material composition according to claim 1, 2 or 3, the polyolefin-based copolymer is an ethylene-vinyl alcohol copolymer.

An arc extinguishing insulating material composition according to claim 6 is
The arc-extinguishing insulating material composition according to claim 1, 2 or 3, wherein the polyamide-based polymer blend is a combination of polyamide and a polyolefin, a combination of polyamide and a thermoplastic elastomer, or a combination of polyamide and rubber. is there.

An arc extinguishing insulating material composition according to claim 7 is
The arc-extinguishing insulating material composition according to claim 1, 2, 3 or 6, wherein the polyamide is nylon 6T or nylon 46.
Alternatively, it is nylon 66.

The arc-extinguishing insulating material composition according to claim 8 is
The arc-extinguishing insulating material composition according to claim 1, wherein the polyamide is nylon 6T, and the total content of the compounds of the metals of Group 1A of the periodic table is 1% or less, the periodic table. One or more selected from the group consisting of an inorganic mineral having a total content of 1A group metal compounds of 1% or less and a ceramic fiber having a total content of 1A group metal compounds of 1A or less. Filler content is 10
˜55%.

An arc extinguishing insulating material composition according to claim 9 is
The arc-extinguishing insulating material composition according to claim 1, wherein the polyamide is nylon 6T, and the total content of the compounds of the metals of Group 1A of the periodic table is 1% or less, the periodic table. One or more selected from the group consisting of an inorganic mineral having a total content of 1A group metal compounds of 1% or less and a ceramic fiber having a total content of 1A group metal compounds of 1A or less. Filler content is 40
˜55%.

The arc-extinguishing insulating material composition according to claim 10 is the arc-extinguishing insulating material composition as claimed in claim 1, 2, 3 or 6, wherein the polyamide is nylon 46 or nylon 66, and the periodic table 1A is used. Glass fibers having a total content of compounds of Group 1 metals of 1% or less, total content of inorganic minerals having a total content of compounds of metals of Group 1A of the periodic table of 1% or less, and compounds of metals of Group 1A of the periodic table The content of at least one filler selected from the group consisting of ceramic fibers having an amount of 1% or less is 10 to 55%.

The arc-extinguishing insulating material composition according to claim 11 is the arc-extinguishing insulating material composition as claimed in claim 1, 2, 3 or 6, wherein the polyamide is nylon 46 or nylon 66, and the periodic table 1A is used. Glass fibers having a total content of compounds of Group 1 metals of 1% or less, total content of inorganic minerals having a total content of compounds of metals of Group 1A of the periodic table of 1% or less, and compounds of metals of Group 1A of the periodic table The content of one or more fillers selected from the group consisting of ceramic fibers having an amount of 1% or less is 30 to 40%.

The arc-extinguishing insulating material composition according to claim 12 is the arc-extinguishing insulating material composition as claimed in claim 1, 2 or 3, wherein the polyacetal-based polymer blend is incompatible with polyacetal and is polyacetal or more. It is a combination of a thermoplastic resin having a melting point of, and polyacetal.

The arc-extinguishing insulating material composition according to claim 13 is the arc-extinguishing insulating material composition as claimed in claim 1, 2 or 3, wherein the polyacetal polymer blend is a combination of polyacetal and nylon 6. It is a thing.

The arc-extinguishing insulating material composition according to claim 14 is mainly composed of a polyacetal polymer blend which is a combination of a thermoplastic resin which is incompatible with polyacetal and has a melting point higher than that of polyacetal, and polyacetal. Used.

An arc extinguishing insulating material composition according to claim 15 is the arc extinguishing insulating material composition as defined in claim 14,
Polyacetal is nylon 6 as a thermoplastic resin which is incompatible and has a melting point higher than that of polyacetal.

The arc-extinguishing insulating material composition according to claim 16 is the arc-extinguishing insulating material composition as defined in claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 1.
In the arc-extinguishing insulating material composition according to 0, 11, 12, 13, 14 or 15, H ₂ O, O ₂ ,
It contains a substance that generates O (atomic oxygen).

An arc extinguishing insulating material composition according to claim 17 is the arc extinguishing insulating material composition as defined in claim 16,
The substance that generates H ₂ O, O ₂ , and O (atomic oxygen) by thermal decomposition is aluminum hydroxide, magnesium hydroxide, antimony tetroxide, or antimony pentoxide.

The arc-extinguishing insulating material composition according to claim 18 contains a substance that generates H ₂ O, O ₂ , and O (atomic oxygen) by thermal decomposition, and the main component of the matrix resin is nylon 6T, It is composed of one selected from the group consisting of nylon 46 and nylon 66.

The arc extinguishing insulating material molded article according to claim 19 is composed of two layers, and the total content of the compound of the metal of the group 1A of the periodic table is 1% or less, the compound of the metal of the group 1A of the periodic table. 20% or less of one or more fillers selected from the group consisting of an inorganic mineral having a total content of 1% or less and a total content of a compound of a metal of Group 1A of the periodic table of 1% or less Containing, the matrix resin comprises an arc-extinguishing insulating material composition whose main component is one selected from the group consisting of polyolefin, polyolefin-based copolymer, polyamide, polyamide-based polymer blend, polyacetal and polyacetal-based polymer blend. Arc layer or non-reinforced polyolefin, polyolefin copolymer, polyamide, polyamide polymer blend, polyacetate Of the arc-extinguishing insulating material composition whose main component is one selected from the group consisting of a polyol and a polyacetal-based polymer blend, and the arced layer is selected from the group consisting of glass fibers, inorganic minerals or ceramic fibers. Containing 20 to 65% of one or more kinds of fillers, and a matrix resin laminated on a layer containing polyolefin, polyolefin-based copolymer, polyamide, polyamide-based polymer blend, polyacetal and polyacetal-based polymer blend as main components Is.

The arc-extinguishing insulating material molded article according to claim 20 is composed of two layers, and the total content of the compound of the metal of Group 1A of the periodic table is 1% or less, the compound of the metal of Group 1A of the periodic table. 20% or less of one or more fillers selected from the group consisting of an inorganic mineral having a total content of 1% or less and a total content of a compound of a metal of Group 1A of the periodic table of 1% or less Containing, the matrix resin comprises an arc-extinguishing insulating material composition whose main component is one selected from the group consisting of polyolefin, polyolefin-based copolymer, polyamide, polyamide-based polymer blend, polyacetal and polyacetal-based polymer blend. Arc layer or non-reinforced polyolefin, polyolefin copolymer, polyamide, polyamide polymer blend, polyacetate Of the arc-extinguishing insulating material composition whose main component is one selected from the group consisting of polyols and polyacetal-based polymer blends, and the arced layer is selected from the group consisting of glass fibers, inorganic minerals or ceramic fibers. 20 to 65% of one or more fillers are contained, and the matrix resin is laminated on a layer containing a thermoplastic resin or a thermosetting resin as a main component.

The arc-extinguishing insulating material molded article according to claim 21 is the arc-extinguishing insulating material molded article according to claim 20,
The thermoplastic resin or thermosetting resin is nylon 6T, nylon MXD6, polyethylene terephthalate or polybutylene terephthalate.

The arc-extinguishing insulating material molded article according to claim 22 is the arc-extinguishing insulating material molded article according to claim 19 or 20, wherein the polyamide in the arced layer and / or the non-arced layer is nylon. 46 or nylon 66.

An arc-extinguishing insulating material molded body according to a twenty-third aspect is the arc-extinguishing insulating material molded article according to the nineteenth, twenty-first, twenty-first or twenty-second aspect, wherein the layer to be arced and / or the layer which is not the layer to be arced. The inorganic mineral is calcium carbonate, wollastonite or hydrous magnesium silicate.

An arc-extinguishing insulating material molded body according to a twenty-fourth aspect is the arc-extinguishing insulating material molded article according to the nineteenth, twenty-first, twenty-first, or twenty-second aspect, wherein the layer to be arced and / or the layer not to be arced The ceramic fibers are those which are aluminum silicate fibers, aluminum borate whiskers or alumina whiskers.

The arc-extinguishing insulating material compact according to claim 25 is the arc-extinguishing insulating-material compact according to claim 19, 20, 21 or 22, wherein the total content of the metal compounds of Group 1A of the periodic table is The unspecified glass fiber is composed of a glass fiber having a total content of compounds of metals of Group 1A of the periodic table of 1% or less.

The arc extinguishing insulating material molded body according to claim 26 is the arc extinguishing insulating material molded article according to claim 19, 20, 21, 22, 23, 24 or 25, wherein H ₂ O is obtained by thermal decomposition. A substance that generates O ₂ and O (atomic oxygen) is contained in the layer to be arced.

The arc-extinguishing insulating-material compact according to claim 27 is a substance which generates H ₂ O, O ₂ , O (atomic oxygen) by thermal decomposition in the arc-extinguishing insulating-material compact according to claim 26. Is aluminum hydroxide, magnesium hydroxide,
It is antimony tetraoxide or antimony pentoxide.

The arc extinguishing device according to claim 28 is the arc extinguishing device according to claim 1,
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
13, 14, 15, 16, 17, 18, 19, 20, 2
The arc-extinguishing insulating material composition or the arc-extinguishing insulating material molded article according to 1, 22, 23, 24, 25, 26 or 27 is used.

According to a twenty-ninth aspect of the invention, there is provided an arc extinguishing device having an insulating material (1) for covering an area other than a contact surface of a contact portion for generating an arc, wherein the insulating material (1) is provided with the insulating material (1). 5,
6, 7, 8, 9, 10, 11, 12, 13, 14, 1
The arc-extinguishing insulating material composition described in 5, 16, 17 or 18 is used.

An arc extinguishing device having an insulator (2) arranged on both sides of a plane including a locus of a contact at the time of opening and closing or on the periphery of a contact portion according to claim 30 is the insulator (2). 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1
2, 13, 14, 15, 16, 17, 18, 19, 2
The arc-extinguishing insulating material composition or the arc-extinguishing insulating material molding described in 0, 21, 22, 23, 24, 25, 26 or 27 is used.

An insulator (1) for covering the portion other than the contact surface of the contact portion for generating an arc according to claim 31 and an insulator (1) arranged on both sides of a plane including the locus of the contact at the time of opening and closing or around the contact portion ( An arc-extinguishing device having 2) is provided on the insulator (1) according to claims 1, 2, 3, 4, 5, 6, 7, 8, 9,
The arc-extinguishing insulating material composition according to 10, 11, 12, 13, 14, 15, 16, 17 or 18 is used, and the insulating portion (2) is provided with the arc-extinguishing insulating material composition. , 7, 8,
9, 10, 11, 12, 13, 14, 15, 16, 1
7, 18, 19, 20, 21, 22, 23, 24, 2
An arc-extinguishing insulating material composition or an arc-extinguishing insulating material molded article according to 5, 26 or 27 is used.

[0048]

In the invention of claims 1 to 13, the arc-extinguishing insulating material composition has a total content of compounds of a metal of Group 1A of the periodic table of 1 or less.
% Or less, glass fiber, inorganic mineral having a total content of compounds of Group 1A metals of 1% or less and Periodic Table 1
Contains at least one filler selected from the group consisting of ceramic fibers having a total content of Group A metal compounds of 1% or less, and the main component of the matrix resin is a polyolefin, a polyolefin-based copolymer, 1 selected from the group consisting of polyamides, polyamide-based polymer blends, polyacetals and polyacetal-based polymer blends 1
Since it is a seed, it is possible to improve arc extinguishing performance, pressure resistance and arc wear resistance. Further, since the main component of these matrix resins is a thermoplastic resin, the molding time can be shortened as compared with a thermosetting resin which requires a curing time during molding.

In the inventions of claims 2 and 3, calcium carbonate, wollastonite or hydrous magnesium silicate is used as the inorganic mineral, and aluminum silicate fiber is used as the ceramic fiber.
Since aluminum borate whiskers or alumina whiskers are used, the arc extinguishing performance can be improved.

In the invention of claim 4, the polyolefin is
Since the specific gravity is polypropylene or polymethylpentene, the weight of the insulating material can be reduced. In particular, polymethylpentene is a crystalline resin having a melting point of 240 ° C., so that an insulating material composition having high heat resistance can be obtained.

In the invention of claim 5, since the polyolefin copolymer is an ethylene-vinyl alcohol copolymer which is a high strength resin, it is possible to further improve the pressure resistance of the insulating material composition.

In the invention of claim 6, the polyamide polymer blend is a combination of polyamide and polyolefin, a combination of polyamide and thermoplastic elastomer, or a combination of polyamide and rubber.
Since the impact resistance is improved, the pressure resistance of the insulating material composition can be further improved.

In the invention of claim 7, since the polyamide is a high melting crystalline polyamide such as nylon 6T, nylon 46 or nylon 66, a high heat distortion temperature can be obtained and the heat resistance can be further improved. it can.

In the inventions of claims 8 and 9, the polyamide is
Since it is nylon 6T, which is a crystalline polyamide with a high melting point, a high heat distortion temperature can be obtained, and the heat resistance can be further improved, and at the same time, the total content of the metal compounds of Group 1A of the periodic table is 1 % Or less glass fiber, periodic table 1A
Inorganic minerals having a total content of compounds of group 1 metals of 1% or less and total content of compounds of metals of group 1A of the periodic table are 1
%, The content of at least one filler selected from the group consisting of ceramic fibers is 10 to 55%, and further 4
Since it is 0 to 55%, further improvement in arc wear resistance and pressure resistance can be achieved.

In the inventions of claims 10 and 11, since the polyamide is nylon 46 or nylon 66 which is a high melting crystalline polyamide, a high heat distortion temperature can be obtained.
The heat resistance can be further improved, and at the same time, the total content of the compound of the metal of Group 1A of the periodic table is 1% or less, and the total content of the compound of the metal of Group 1A of the periodic table is 1%. The content of one or more fillers selected from the group consisting of ceramic fibers having a total content of the following inorganic minerals and compounds of metals of Group 1A of the periodic table of 1% or less is 1
Since it is 0 to 55%, and further 30 to 40%, it is possible to improve arc wear resistance and pressure resistance. Furthermore, since nylon 46 and nylon 66 do not have an aromatic ring in their chemical structural formulas, surface carbonization by an arc is small, and the arc extinguishing property can be further improved.

In the twelfth aspect of the invention, the polyacetal-based polymer blend, which is a combination of a thermoplastic resin which is incompatible with polyacetal and has a melting point higher than that of polyacetal, and polyacetal is the main component of the matrix resin. When the arc surface is formed of a rich layer of polyacetal, the arc extinguishing performance is improved by the gas generated from the polyacetal by the arc. Further, it may have heat resistance higher than that of polyacetal depending on the material of the polymer blend partner. In addition, a glass fiber having a total content of compounds of a metal of Group 1A of the periodic table of 1% or less, an inorganic mineral having a total content of compounds of a metal of Group 1A of the periodic table of 1% or less, and a metal of a metal of Group 1A of the periodic table Since it contains one or more fillers selected from the group consisting of ceramic fibers having a total content of compounds of 1% or less,
The pressure resistance and arc wear resistance can be improved.

In the invention of claim 13, the polyacetal polymer blend is a combination of polyacetal and nylon 6, and in addition to the matters described in the invention of claim 12, nylon 6 has an aromatic ring in its chemical structural formula. Since it does not have, the carbonization of the surface by the arc is small, and the arc extinguishing property can be further improved.

In the fourteenth aspect of the present invention, a polyacetal-based polymer blend, which is a combination of a polyacetal and a thermoplastic resin that is incompatible with polyacetal and has a melting point higher than that of polyacetal, is the main component of the matrix resin. When the arc surface is formed of a rich layer of polyacetal, the arc extinguishing performance is improved by the gas generated from the polyacetal by the arc. Further, depending on the material of the partner of the polymer blend, it can have heat resistance higher than that of polyacetal.

In the invention of claim 15, the polyacetal-based polymer blend is a combination of polyacetal and nylon 6, and in addition to the matters described in the invention of claim 12, nylon 6 has an aromatic ring in its chemical structural formula. Since it does not have, the carbonization of the surface by the arc is small, and the arc extinguishing property can be further improved.

According to a sixteenth aspect of the present invention, the arc-extinguishing insulating material composition according to any one of the first to fifteenth aspects is decomposed into H ₂ O by thermal decomposition.
Since a substance that generates O ₂ and O (atomic oxygen) is contained and the gas or the like generated by the decomposition of these suppresses the generation of free carbon, the arc extinguishing performance can be further improved.

In the seventeenth aspect of the invention, H is generated by thermal decomposition.
_The substances that generate ₂ O, O ₂ , and O (atomic oxygen) are aluminum hydroxide, magnesium hydroxide, antimony tetroxide, or antimony pentoxide. These are more preferable because they suppress the generation of free carbon. The arc performance can be further improved.

In the eighteenth aspect of the invention, H ₂ O, O ₂ and O
Since it contains a substance that generates (atomic oxygen), and a gas or the like generated by the decomposition of the substance suppresses the generation of free carbon, it can be used in combination with a specific polymer to further improve the arc extinguishing performance.

According to the nineteenth to twenty-seventh aspects of the present invention, by forming the arc extinguishing insulating material molded body into two layers, a layer excellent in arc extinguishing property and a layer excellent in pressure resistance strength, arc wear resistance and heat resistance. Can have.

In the inventions of claims 19 to 21, the arced layer of the arc-extinguishing insulating material molded body is a glass fiber having a total content of the metal compounds of Group 1A of the periodic table of 1% or less, and the periodic table 1
One or more selected from the group consisting of an inorganic mineral having a total content of a compound of a Group A metal of 1% or less and a ceramic fiber having a total content of a compound of a Group A metal of 1A or less Contains 20% or less of a filler, and the matrix resin contains, as a main component, one selected from the group consisting of polyolefin, polyolefin-based copolymer, polyamide, polyamide-based polymer blend, polyacetal and polyacetal-based polymer blend, or Since the main component is one selected from the group consisting of a reinforced polyolefin, a polyolefin-based copolymer, a polyamide, a polyamide-based polymer blend, a polyacetal and a polyacetal-based polymer blend, arc extinguishing performance can be improved.

In the nineteenth aspect of the present invention, the arc extinguishing insulating material molded body contains 20 to 65 of one or more fillers selected from the group consisting of glass fibers, inorganic minerals and ceramic fibers.
%, The matrix resin is a polyolefin, a polyolefin-based copolymer, a polyamide, a polyamide-based polymer blend, a polyacetal and a polyacetal-based polymer blend. The arc consumability can be improved.

In the inventions of claims 20 and 21, the arc extinguishing insulating material molded article contains 20 to 65% by weight of one or more fillers selected from the group consisting of glass fibers, inorganic minerals and ceramic fibers. 6T, nylon MXD
6. The layer to be arced is laminated on a layer containing a thermoplastic resin or a thermosetting resin such as polyethylene terephthalate or polybutylene terephthalate as a main component,
The pressure resistance and arc wear resistance can be improved. In particular, since nylon 6T has a higher melting point than nylon 46 and nylon 66, it is possible to further improve heat resistance.

According to the twenty-second aspect of the invention, since the polyamide is nylon 46 or nylon 66 having no aromatic ring in the chemical structural formula, the surface carbonization by the arc is small and the arc extinguishing property is further improved. You can

In the inventions of claims 23 to 25, calcium carbonate, wollastonite or hydrous magnesium silicate is used as the inorganic mineral, and aluminum silicate fiber is used as the ceramic fiber.
Aluminum borate whisker or alumina whisker is used as the glass fiber for which the total content of the compound of the metal of Group 1A of the periodic table is not specified, and the glass fiber of which the total content of the compound of the metal of Group 1A of the periodic table is 1% or less is used. Therefore, arc extinguishing performance can be improved.

In the invention of claim 26, claims 19 to 25
The arc-exposed layer of the arc-extinguishing insulating material molded article described above contains a substance that generates H ₂ O, O ₂ , and O (atomic oxygen) by thermal decomposition, and the gas or the like generated by these decompositions is free carbon. Since the generation is suppressed, the arc extinguishing performance can be further improved.

In the twenty-seventh aspect of the invention, H is generated by thermal decomposition.
_The substances that generate ₂ O, O ₂ , and O (atomic oxygen) are aluminum hydroxide, magnesium hydroxide, antimony tetroxide, or antimony pentoxide. These are more preferable because they suppress the generation of free carbon. The arc performance can be further improved.

According to a twenty-eighth aspect of the present invention, by using the arc-extinguishing insulating material composition or the arc-extinguishing insulating material molded body according to any one of the first to twenty-seventh aspects, the arc-extinguishing device can be downsized and the current limiting interrupted. The performance can be improved.

According to a twenty-ninth aspect of the present invention, the insulating material (1) for covering a portion other than the contact surface of the contact portion for generating an arc is defined by the first aspect.
By using the arc-extinguishing insulating material composition as described in any of 1 to 18, it is possible to reduce the size of the arc-extinguishing device and improve the current limiting interruption performance.

According to the invention of claim 30, for extinguishing an arc according to any one of claims 1 to 27, the insulator (2) arranged on both sides of the plane including the locus of the contact at the time of opening and closing or around the contact part. By using the insulating material composition or the arc extinguishing insulating material compact, it is possible to reduce the size of the arc extinguishing device and improve the current limiting interrupting performance.

According to a thirty-first aspect of the present invention, there is provided an arc-extinguishing device having an insulator (1) for covering a portion other than a contact surface of a contact portion for generating an arc, wherein the arc-extinguishing insulation according to any one of the first to eighteenth aspects. The insulating material for arc-extinguishing according to any one of claims 1 to 27, which is made of a material composition and is used as an insulator (2) arranged on both sides of a plane including a locus of theoretical points at the time of opening and closing or around a contact portion. By using the composition or the molded product of the insulating material for arc extinguishing, the arc extinguishing device can be downsized and the current limiting interrupting performance can be improved.

[0075]

EXAMPLES The arc-extinguishing insulating material composition (I) of the present invention contains a specific matrix resin containing the specific filler as a main component.

The filler is glass fiber having a total content of metal compounds of Group 1A of the periodic table of 1% or less,
One or more selected from the group consisting of an inorganic mineral having a total content of a compound of a Group A metal of 1% or less and a ceramic fiber having a total content of a compound of a Group A metal of 1A or less It is a filler.

The filler is used for improving arc wear resistance, pressure resistance and arc extinguishing performance.

The metals of group 1A of the periodic table (Li, Na,
K, Rb, Cs, Fr) compound means M ₂ O (Na
₂ O, K ₂ O, Li ₂ O, etc.).

The filler contains less than 1% of the compounds in their total amount. If the content exceeds 1%, the arc extinguishing performance becomes poor. The total content of the compounds is preferably 0.6% or less, more preferably 0.15% or less from the viewpoint of arc extinguishing performance. An X-ray diffraction method is used as a method for measuring the total content of the compounds.

The glass fiber is used to improve the pressure resistance strength and arc wear resistance resulting from its reinforcing effect.

The glass fiber refers to a fibrous material made of glass, and is not particularly limited as long as the total content of the compounds of the metals of Group 1A of the periodic table is satisfied. Examples of the glass material include E glass, S glass, D glass, T glass, and silica glass, but S glass, D glass, T glass, and silica glass are included because they do not contain a compound of a metal of Group 1A of the periodic table. preferable. Examples of the glass fiber product include long fiber, short fiber, and glass wool, but short fiber is preferable from the viewpoint of being used as a filler for thermoplastic resin.

From the standpoint of pressure resistance, it is preferable that the glass fiber has a diameter of 6 to 13 μm and an aspect ratio of 10 or more. Further, it is preferable that the glass fiber is treated with a treating agent such as a silane coupling agent from the viewpoint of pressure resistance.

The inorganic mineral is used for improving arc extinction performance and arc wear resistance and pressure resistance.

The inorganic mineral is not particularly limited as long as it satisfies the total content of the compounds of Group 1A metals of the periodic table. Specific examples of the inorganic minerals include hydrous magnesium silicates such as calcium carbonate, wollastonite, talc, aston, chrysotile and sepiolite, and the like, which are preferable from the viewpoint of improving the wear performance.

Calcium carbonate whose surface dispersibility is improved by a surface modifier such as stearic acid is preferable from the viewpoint of pressure resistance.

The wollastonite is preferably fibrous and has a large aspect ratio from the viewpoint of pressure resistance. The hydrous magnesium silicate is preferably fibrous like Aston from the viewpoint of pressure resistance.

The ceramic fiber is used for improving arc extinction performance and arc wear resistance and pressure resistance.

The ceramic fiber is a fibrous material made of ceramics, and is not particularly limited as long as the total content of the compounds of the metals of Group 1A of the periodic table is satisfied.
Specific examples of the ceramic fibers are preferably aluminum silicate fibers, aluminum borate whiskers, and alumina whiskers from the viewpoint of improving arc extinguishing performance and pressure resistance.

From the viewpoint of pressure resistance, it is preferable that the fiber has a diameter of 1 to 10 μm and an aspect ratio of 10 or more.

The filler may be used alone or in combination of two or more. When two or more kinds are used, the glass fibers and the inorganic minerals, the glass fibers and the ceramic fibers, the inorganic minerals and the ceramic fibers, the glass fibers each other, the inorganic minerals each other, the ceramic fibers each other, A combination of the glass fiber, the inorganic mineral, and the ceramic fiber is preferable from the viewpoint of arc extinguishing performance.

When used in combination, the weight ratio is 5 / in the case of glass fiber / inorganic mineral, glass fiber / ceramic fiber and inorganic mineral / ceramic fiber.
It is preferably 50 to 50/5, more preferably 10/30 to 30/10, and in the glass fiber: inorganic mineral: ceramic fiber, 1: 1 to 1: 1: 10 is preferable.

The matrix resin is polyolefin,
It is one selected from the group consisting of a polyolefin-based copolymer, a polyamide, a polyamide-based polymer blend, a polyacetal and a polyacetal-based polymer blend.

The matrix resin is used for improving arc extinguishing performance, pressure resistance and arc wear resistance, and for shortening molding time.

Polyolefin has no aromatic ring and is excellent in impact resistance, and therefore is used for satisfying arc extinguishing performance and pressure resistance. Specific examples thereof include polypropylene, polyethylene, polymethylpentene and the like. Among them, polypropylene, polymethylpentene, and the like having a low specific gravity are preferable from the viewpoint of reducing the weight of the insulating material. Especially, polymethylpentene is a crystalline resin having a melting point of 240 ° C., and thus high heat resistance can be obtained. preferable.

Since the polyolefin-based copolymer has no aromatic ring, it is used to satisfy arc extinguishing performance.
Specific examples thereof include ethylene-vinyl alcohol copolymers and ethylene-vinyl acetate copolymers, but high-strength resins such as ethylene-vinyl alcohol copolymers are preferable from the viewpoint of improving pressure resistance. . Copolymerization ratio of ethylene / vinyl alcohol is 30/70 to 45
/ 55, and more preferably 30/70 to 35/65 from the viewpoint of pressure resistance.

Polyamide refers to a polymer compound having an amide bond, and in the present invention, it also includes a polyamide copolymer. Polyamide is a high-strength resin, and is used to satisfy pressure resistance. Specific examples are nylon 6T, nylon 46, nylon 66, nylon MXD.
6, Nylon 610, Nylon 6, Nylon 11, Nylon 12, and a copolymer of Nylon 6 and Nylon, such as Nylon. Nylon refers to linear synthetic polyamide among polyamides. Nylon mn
Means a polycondensation product of a diamine (NH ₂ (CH ₂ ) mNH ₂ ) having a carbon number of m and a dibasic acid (HOOC (CH ₂ ) _n-2 COOH) having a carbon number of n. Nylon n has a carbon number of ω− of n
A polymer of amino acid (H ₂ N (CH ₂ ) _n-1 COOH) or lactam.

Among the specific examples of the polyamide, nylon 6T (melting point 320, which is a crystalline polyamide having a high melting point, is used.
℃), nylon 46 (melting point 290 ℃) and nylon 6
6 (melting point 260 ° C.) is preferable from the viewpoint that a high heat distortion temperature can be obtained and the heat resistance can be further improved.

The chemical formulas of typical polyamides are shown below.

[0099]

[Chemical 1] A polyamide-based polymer blend is a blend of a polyamide-based polymer and another polymer. Polyamide-based polymer blends are used for improving impact resistance, and they include blends of polyamide and polyolefin, blends of polyamide and thermoplastic elastomer, blends of polyamide and rubber, and the like.

As the polyamide, those mentioned above can be used. As the polyamide used in the polyamide polymer blend, nylon 46, nylon 66, etc., which have a high melting point and do not have an aromatic ring, can be used in terms of heat resistance and arc extinguishing performance. Is preferred.

As the polyolefin used in the polymer blend, those mentioned above can be used, and among them, polypropylene is preferable from the viewpoint of pressure resistance.

The thermoplastic elastomer used in the polymer blend is a polyolefin elastomer,
Polyamide elastomer, polyester elastomer and the like are available, and among them, polyolefin elastomer is preferable from the viewpoint of pressure resistance.

The rubber used in the polymer blend includes butadiene rubber, ethylene-propylene rubber, acrylic acid rubber, etc. Among them, ethylene-propylene rubber is preferable from the viewpoint of pressure resistance.

From the viewpoint of heat resistance and compressive strength, the blending ratio is 1 to 15 parts, more preferably 5 parts to 100 parts of polyamide (parts by weight, the same applies hereinafter) in the case of any of polyolefin, thermoplastic elastomer and rubber. -10 parts is preferable.

Polyacetal is used to improve arc extinguishing performance by the gas generated from the polyacetal by the arc. Specific examples thereof include polyoxymethylene homopolymers and copolymers.

The polyacetal-based polymer blend improves the arc extinguishing performance by the gas generated from the polyacetal by the arc in the polyacetal part in the blend as described above, and the thermoplastic resin other than the polyacetal in the blend provides a heat resistance higher than that of the polyacetal. It is used to give sexuality.

The polyacetal has the same contents as described above, and as the polymer used in the polymer blend, a thermoplastic resin which is incompatible with the polyacetal and has a melting point not lower than that of the polyacetal, preferably not higher than 230 ° C. It is preferable from the viewpoint of improving heat resistance. The phrase “incompatible with polyacetal” means that a remarkable change in elastic modulus and a peak of loss tangent are observed at the respective glass transition temperatures of the polyacetal and the material of the partner of the polymer blend. The melting point of polyacetal is 178 ° C. for homopolymer and 167 for copolymer.
℃.

Specific examples of the thermoplastic resin include nylon 6 and polybutylene terephthalate.
Among them, nylon 6 is preferable because it does not have an aromatic ring in its chemical structural formula, so that surface carbonization by an arc is small and the arc extinguishing performance can be further improved.

The blend ratio is 10% by weight of polyacetal.
From the viewpoint of heat resistance, 100 to 400 parts, and more preferably 200 to 300 parts, relative to 0 parts are preferable.

The matrix resin contains the above resin as a main component, and may contain a component such as a flame retardant as an auxiliary component other than the filler. As the flame retardant, a phosphorus flame retardant or an inorganic flame retardant containing no aromatic ring is preferable.

The arc-extinguishing insulating material composition (I) of the present invention is
As described above, the matrix resin contains the specific filler and subcomponents. The specific filler is 10 to 55 relative to the total weight of the arc extinguishing insulating material composition (I).
%, More preferably 30 to 40%.
When the content is less than 10%, the arc wear resistance and pressure resistance tend to be insufficient, and when it exceeds 55%, the arc extinguishing performance tends to be insufficient.

The arc extinguishing insulating material composition (I) containing 10 to 55% of the above-mentioned filler mainly has a low current value (100
Used for circuit breakers of A grade).

Even when the content is less than 10%, by laminating it with another material as described later,
It is possible to improve arc wear resistance and pressure resistance as a laminated product. In the case of a laminated product, it is mainly used for a circuit breaker having a high current value (about 200 A or more).

When the matrix resin is nylon 6T, the specific filler is 10 to 55%, and further 4
The content of 0 to 55% is preferable from the viewpoint of further improving arc wear resistance and pressure resistance.

In the case of nylon 46 or nylon 66, the specific filler is contained in an amount of 10 to 55%, more preferably 30 to 40% to further improve arc extinguishing performance and arc wear resistance. It is preferable from the viewpoint of improving the pressure resistance.

The arc extinguishing insulating material composition (I) of the present invention further contains a substance (hereinafter referred to as a free carbon inhibitor) which generates H ₂ O, O ₂ and O (atomic oxygen) by thermal decomposition. This is preferable from the viewpoint of suppressing the generation of free carbon and improving arc extinguishing performance.

In order to confirm that the substance is capable of generating H ₂ O, O ₂ , and O (atomic oxygen) by the thermal decomposition, the decomposition gas is decomposed by heating, for example, in nitrogen, and the decomposition gas is fed to a gas detector tube. It can be carried out by a method such as passing it through and measuring its concentration.

As specific examples of the above-mentioned free carbon inhibitor, aluminum hydroxide, magnesium hydroxide, antimony tetroxide and antimony pentoxide are preferable from the viewpoint of the effect of suppressing the generation of free carbon. In the case of aluminum hydroxide or magnesium hydroxide, H ₂ O generated by the above decomposition
However, in the case of antimony tetroxide or antimony pentoxide, O ₂ and O generated by the decomposition react with the metal generated from the electrode material or the free carbon generated from the arc extinguishing material to form metal oxide, monoxide. By forming carbon or carbon dioxide, it is possible to suppress insulation failure.

The content of the above-mentioned free carbon inhibitor in the arc extinguishing insulating material composition (I) is preferably 20% or less. When the content exceeds 20%, the pressure resistance tends to decrease particularly in the combination of nylon and magnesium hydroxide.

When the arc-extinguishing insulating material composition (I) of the present invention further contains the above-mentioned free carbon inhibitor, the arc-extinguishing composition is particularly the same except that the above-mentioned free-carbon inhibitor is further contained. It is no different from the insulating material composition (I).

The method for producing the arc-extinguishing insulating material composition (I) is not particularly limited as long as the filler, subcomponents and the like can be mixed in the matrix resin, but usually, extrusion mixing method and roll mixing are used. Method, etc., to obtain pellets, sheets, and other shapes.

Among the above arc-extinguishing insulating material compositions (I) of the present invention, those which are generally preferred are listed below. A matrix resin containing Nylon 46, Nylon 66 or Nylon 6T as a main component, which contains 30 to 50% of glass fibers made of E glass having a total content of metal compounds of Group 1A of the periodic table of 1% or less. It is preferable in terms of heat resistance, arc wear resistance, pressure resistance and economy.

Further, a matrix resin mainly composed of nylon 46 and nylon 66 containing aluminum borate whiskers or aluminum silicate fibers 30 to 40% in which the total content of the metal compounds of Group 1A of the periodic table is 1% or less. Is preferably from the viewpoint of heat resistance and arc extinguishing performance.

Nylon 46 and nylon 66 containing 30 to 40% of hydrous magnesium silicate or wollastonite having a total content of compounds of metals of Group 1A of the periodic table of 1% or less.
A matrix resin containing as a main component is preferable in terms of heat resistance and arc extinguishing performance.

Each of the above-mentioned comprehensively preferred arc-extinguishing insulating material compositions further contains 5 to 20% magnesium hydroxide.
The arc-extinguishing insulating material composition containing is preferable because it has an excellent effect of suppressing generation of free carbon and suppresses insulation failure.

Next, the arc-extinguishing insulating material composition (I
I) will be explained.

The composition is an arc-extinguishing insulating material composition which contains a polyacetal-based polymer blend, which is incompatible with polyacetal and has a melting point equal to or higher than that of polyacetal, and polyacetal. is there. The material composition can improve arc-extinguishing performance by the gas generated from the polyacetal by the arc in the polyacetal portion in the blend, and can have heat resistance higher than that of the polyacetal by the thermoplastic resin other than the polyacetal in the blend. It is a thing.

Description of polyacetal, thermoplastic resin which is incompatible with polyacetal and has a melting point higher than that of polyacetal, blend ratio, type of subcomponents, blending amount thereof, shape of arc-extinguishing insulating material composition, manufacturing method, etc. Is the same as the content described in the arc-extinguishing insulating material composition (I), and is therefore omitted.

The arc-extinguishing insulating material composition (II) of the present invention may further contain the above-mentioned free carbon inhibitor, in which case the generation of free carbon is suppressed and the arc-extinguishing performance is improved. be able to.

Specific examples, preferred specific examples, content and other matters of the free carbon inhibitor are the same as those described in the arc-extinguishing insulating material composition (I), and therefore will be omitted.

Among the above-mentioned arc-extinguishing insulating material composition (II), as a comprehensively preferable one, nylon 6 100 is preferable.
An insulating material composition containing a polymer blend of 100 parts by weight and 100 to 25 parts of polyacetal as a main component is preferable from the viewpoint of arc extinguishing performance and heat resistance. In addition, the insulating material, magnesium hydroxide or aluminum hydroxide 5-20%
The arc-extinguishing insulating material composition containing is preferable because it has an excellent effect of suppressing generation of free carbon and suppresses insulation failure.

Next, the arc extinguishing insulating material composition of the present invention (II
I) will be explained. It is H ₂ O by thermal decomposition,
An arc-extinguishing insulating material composition containing a substance that generates O ₂ and O (atomic oxygen), wherein the main component of the matrix resin is one selected from the group consisting of nylon 6T, nylon 46 and nylon 66. is there. The material composition generates H ₂ O, O ₂ , and O (atomic oxygen) by thermal decomposition, and these suppress generation of free carbon, so that arc extinguishing performance can be improved.

The contents of the free carbon suppressor and nylon 6T, nylon 46, nylon 66, etc. are the same as those described in the arc extinguishing insulating material composition (I), and therefore the description thereof is omitted.

As the free carbon inhibitor, magnesium hydroxide, antimony tetroxide or antimony pentoxide is preferable from the viewpoint of easy addition to the resin.

The content of the free carbon inhibitor in the arc-extinguishing insulating material composition (III) is preferably 5 to 20%. If the content is less than 5%, the effect of suppressing the generation of free carbon tends to be insufficient, and if it exceeds 20%, the pressure resistance tends to decrease.

The manufacturing method, shape, and the like of the arc-extinguishing insulating material composition (III) are the same as those of the insulating material composition (I), and thus the description thereof is omitted.

Arc-extinguishing insulating material composition (I) of the present invention,
(II) and (III) can be formed into a molded product having a specific shape. The molded body may be, for example, an insulator (1) that covers a portion other than the contact surface of a contact portion that generates an arc in an arc extinguishing device and / or both sides of a plane including the locus of the contact when opening or closing or around the contact portion Those used for the arranged insulator (2) and the like can be mentioned. The shape, structure, and size (thickness) of the molded product may differ depending on the shutoff method of the arc extinguishing device, but examples include those shown in FIGS.

As the method for producing the above-mentioned molded product, for example, an injection molding method, a heat pressing method or the like is used. From the viewpoint of mass productivity, the injection molding method is preferably used.

Next, the arc extinguishing insulating material molded article (I) of the present invention will be described.

That is, a glass fiber having a total content of a metal compound of Group 1A of the periodic table of 1% or less, an inorganic mineral having a total content of a compound of a metal of Group 1A of the periodic table of 1% or less, and a periodic table 1A The total content of compounds of group III metals is 1%
1 selected from the group consisting of ceramic fibers which are:
Contains 20% or less of one or more kinds of fillers, and the matrix resin is a main component selected from the group consisting of polyolefins, polyolefin-based copolymers, polyamides, polyamide-based polymer blends, polyacetals and polyacetal-based polymer blends. A layer to be arced consisting of an arc-extinguishing insulating material composition or one selected from the group consisting of non-reinforced polyolefin, polyolefin-based copolymer, polyamide, polyamide-based polymer blend, polyacetal and polyacetal-based polymer blend The arced layer comprising the arc-extinguishing insulating material composition contains 20 to 65% by weight of one or more fillers selected from the group consisting of glass fibers, inorganic minerals or ceramic fibers, and the matrix resin is polyolefin. Polyolefin-based copolymer, poly An arc-extinguishing insulating material molded body, which is laminated in a layer made of an arc-extinguishing insulating material composition containing, as a main component, one selected from the group consisting of amide, a polyamide-based polymer blend, a polyacetal and a polyacetal-based polymer blend is there.

In the present invention, the arc-extinguishing insulating material is made into two layers, so that the arc-extinguishing material is composed of a single layer of the insulating material compositions (I) to (III) as compared with the case where the arc-extinguishing material is formed. There is an advantage that it is possible to have a layer to be arced having excellent performance and a layer on which the layer to be arced is laminated (hereinafter also referred to as a base layer), which is excellent in pressure resistance, arc wear resistance and heat resistance.

The layer to be arced plays a role of improving arc extinguishing performance. Purpose of use of the specific filler constituting the layer to be arced containing the filler (hereinafter, also referred to as layer to be arced A), contents of metal compound of Group 1A of periodic table and content of the compound, glass fiber The purpose, content, preferred compound, etc. of each of the inorganic minerals and ceramic fibers are the same as the content described for the arc-extinguishing insulating material composition (I), and therefore are omitted here.

Further, the purpose of use of the matrix resin, the purpose of use of each polymer, the contents and specific examples of each polymer, the preferred specific examples and the reason thereof, the contents and contents of the subcomponents of the matrix resin, etc. Since the content is the same as that described for the insulating material composition (I), it is omitted here.

When the matrix resin is nylon 46 or nylon 66, since no aromatic ring is contained in the chemical structural formulas of these thermoplastic resins, surface carbonization due to arc is small, and further arc extinction is achieved. The performance can be improved.

The layer to be arced A contains 20% or less of the specific filler in the matrix resin. The content is 2
When it is 0% or less, the arc extinguishing performance can be satisfied even by shutting off the arc extinguishing device having a large current value. The content is preferably 5 to 20% from the viewpoint of arc wear resistance and arc extinguishing performance.

As another aspect of the layer to be arced constituting the arc extinguishing insulating material molded article (I) of the present invention, there is an layer to be arced B containing no filler, that is, using a non-reinforced matrix resin. .

Purpose of use of the matrix resin constituting the layer B to be arced, purpose of use of each thermoplastic resin, contents and specific examples of each thermoplastic resin, preferable specific examples and reasons therefor, contents of subcomponents of the matrix resin. Since the content and the content are the same as those described for the layer to be arced A, they are omitted here.

Compared to the layer to be arced A, the layer to be arced B is preferably the layer to be arced B from the viewpoint of arc extinguishing performance as the breaking current of the arc extinguishing device becomes larger.

Next, the base layer will be described. The base layer plays a role of improving arc wear resistance and pressure resistance.

The glass fiber, inorganic mineral or ceramic fiber contained in the base layer is used for improving arc wear resistance and pressure resistance. In the base layer, the total content of the metal compounds of Group 1A of the periodic table in the filler is not particularly limited. This is because the arc-extinguishing performance is not particularly required to be improved because it is located at a position where it is difficult to contact the arc. However, even in the case of the filler such as glass fiber, the total content of the compounds is preferably 1% or less from the viewpoint of safety of the arc extinguishing device.

Other description of the glass fiber, inorganic mineral or ceramic fiber contained in the base layer, that is, purpose of use, content, preferred compound and purpose of the matrix resin, purpose of use of each polymer,
The contents and specific examples of each polymer, preferred specific examples and the reasons therefor, and the contents and contents of the subcomponents of the matrix resin are the same as those described for the arc-extinguishing insulating material composition (I). Omit it. However, a filler having a total content of compounds of metals of Group 1A of the periodic table, such as clay, kaolin, and mica, of more than 1% in the base layer can be preferably used.

When the matrix resin of the base layer is nylon 46 or nylon 66, it is preferable in terms of safety of the arc extinguishing device.

Further, since the base layer is laminated with the layer to be arced, it is preferable that the same type of resin is used in terms of adhesiveness and the like.

The base layer contains 20 to 65% of the filler. If the content is less than 20%, the arc wear resistance and pressure resistance tend to be insufficient, and if it exceeds 65%, the formability tends to decrease. The content is 3 in terms of arc wear resistance, pressure resistance, and formability.
5 to 50% is preferable.

The arc-extinguishing insulating material molded article (I) of the present invention is formed by laminating the layer to be arced and the base layer as described above. The shape, structure and dimensions of the arc-extinguishing device are cut off. Depending on the system, examples are shown in FIGS. 8 to 10.

From the viewpoint of mass productivity, the injection molding method is particularly preferably a two-color molding method as the method for manufacturing the molded body.

Next, the arc extinguishing insulating material molded body (II) of the present invention, which also has two layers, will be described.

That is, a glass fiber having a total content of a compound of a metal of Group 1A of the periodic table is 1% or less, an inorganic mineral having a total content of a compound of a metal of Group 1A of the periodic table of 1% or less, and a periodic table 1A. The total content of compounds of group III metals is 1%
1 selected from the group consisting of ceramic fibers which are:
Contains 20% or less of one or more kinds of fillers, and the matrix resin is a main component selected from the group consisting of polyolefins, polyolefin-based copolymers, polyamides, polyamide-based polymer blends, polyacetals and polyacetal-based polymer blends. A layer to be arced consisting of an arc-extinguishing insulating material composition or one selected from the group consisting of non-reinforced polyolefin, polyolefin-based copolymer, polyamide, polyamide-based polymer blend, polyacetal and polyacetal-based polymer blend The layer to be arced made of the arc-extinguishing insulating material composition contains 20 to 65% of one or more fillers selected from the group consisting of glass fibers, inorganic minerals or ceramic fibers, and the matrix resin is thermoplastic. Resin or thermosetting resin as the main component Formed by laminating a layer made of use insulating material composition is the arc extinguishing insulative material molded body.

In the arc-extinguishing insulating material molded body (II), the matrix resin constituting the base layer of the arc-extinguishing insulating material molded article (I) is mainly composed of a thermoplastic resin or a thermosetting resin. The arc-extinguishing insulating material composition is different from the arc-extinguishing insulating material molded body (I) in that a layer made of the arc-extinguishing insulating material composition is formed. Therefore, the arc extinguishing insulating material molded body (II) has a feature that the arc wear resistance and pressure resistance are further improved as compared with the arc extinguishing insulating material molded body (I).

The thermoplastic resin or thermosetting resin is used for improving arc wear resistance and pressure resistance. Specific examples of the resin include nylon 6T, nylon MXD, polyethylene terephthalate, polybutylene terephthalate, modified polyphenylene oxide, polyphenylene sulfide, polysulfone, polyether sulfone and polyether ketone. These may be used alone or in combination of two or more. Of these, nylon 6T, nylon MXD, polyethylene terephthalate or polybutylene terephthalate are preferable from the viewpoint of moldability and economy.

Arc-containing layer A containing filler, arc-containing layer B containing no filler, base layer material, shape and structure and molding of the insulating material, which form the arc-extinguishing insulating material compact (II). The details of the shape and manufacturing method of the body (II) are the same as those described for the arc-extinguishing insulating material molded body (I), and will not be repeated here.

The arc-extinguishing insulating material molding (I) or (II) of the present invention further contains the above-mentioned free carbon inhibitor to suppress the generation of free carbon and to improve the arc-extinguishing performance. It is preferable from the point.

Specific examples and preferable specific examples of the free carbon suppressor are the same as those described for the arc-extinguishing insulating material composition (I), and therefore are omitted here.

Further, the free carbon inhibitor is necessary to be contained in the layer to be arced, because free carbon is generated by contacting the arc. In this case, examples of the free carbon inhibitor include aluminum hydroxide, magnesium hydroxide, antimony tetroxide, antimony pentoxide and the like. Among them, magnesium hydroxide is preferable from the viewpoint of easy addition.

The content of the free carbon inhibitor in the layer to be arced A and the content in the layer to be arced B are each preferably 20% or less. If the content exceeds 20%, the pressure resistance tends to decrease, especially in the combination of nylon and magnesium hydroxide.

Among the arc-extinguishing insulating material moldings (I) and (II) of the present invention, the following are generally preferred. The layer to be arced is mainly composed of aluminum borate whiskers having a total content of metal compounds of Group 1A of the periodic table of 1% or less or nylon 46 or nylon 66 containing 5 to 10% of aluminum silicate fibers as a main component. A resin whose base layer is a matrix resin whose main component is nylon 46 or nylon 66 containing aluminum borate whiskers or aluminum silicate fibers 35 to 50% has heat resistance, arc extinguishing performance and arc resistance. It is preferable in terms of wear resistance and pressure resistance.

The layer to be arced is mainly nylon 46 or nylon 66 containing 5 to 10% of aluminum borate whiskers or aluminum silicate fibers having a total content of compounds of metals of Group 1A of the periodic table of 1% or less. Nylon 4 containing a matrix resin as a component, and the base layer containing 35 to 50% of glass fibers made of E glass having a total content of compounds of metals of Group 1A of the periodic table of 1% or less.
A resin composed of 6 or a matrix resin containing nylon 66 as a main component is preferable in terms of heat resistance, arc extinguishing performance, arc wear resistance, and pressure resistance.

The layer to be arced is mainly nylon 46 or nylon 66 containing aluminum borate whiskers or aluminum silicate fibers 5 to 10% in which the total content of the metal compounds of Group 1A of the periodic table is 1% or less. Nylon M containing a matrix resin as a component, and the base layer containing 35 to 50% of glass fibers made of E glass having a total content of compounds of metals of Group 1A of the periodic table of 1% or less.
A resin made of a matrix resin containing XD, nylon 6T, polyethylene terephthalate or polybutylene terephthalate as a main component is preferable from the viewpoint of arc extinguishing performance, arc wear resistance and pressure resistance.

Also, the layer to be arced is a non-reinforced nylon 4
6 or a matrix resin containing nylon 66 as a main component, and a base layer containing a matrix resin containing nylon 46 or nylon 66 as a main component containing aluminum borate whiskers or aluminum silicate fibers 35 to 50%. , Heat resistance, arc extinguishing performance, arc wear resistance, and pressure resistance are preferable.

In the above-mentioned comprehensively preferred arc-extinguishing insulating material moldings (I) or (II), in each layer to be arced,
Further, an arc-extinguishing insulating material molded product containing 5 to 20% of magnesium hydroxide is preferable from the viewpoint of further excellent effect of suppressing generation of free carbon and suppressing insulation failure.

Next, the arc extinguishing device of the present invention will be described.

The arc-extinguishing device of the present invention is characterized by using any one of the arc-extinguishing insulating material compositions (I) to (III) and / or the arc-extinguishing insulating material molded body. It is an arc device.

In the arc-extinguishing device of the present invention, for example, in the arc-extinguishing device having an insulating material (1) for covering an area other than the contact surface of a contact portion for generating an arc, the insulating material (1) is defined by claim 1.
19. An arc extinguishing device (I), which is the arc-extinguishing insulating material composition according to any one of claims 1 to 18, and insulation arranged on both sides of a plane including a trajectory of a contact at the time of opening and closing or around the contact. An arc extinguishing device having an object (2), the insulator (2)
Is an insulating material composition for arc extinguishing or a molded article of insulating material for arc extinguishing according to any one of claims 1 to 27, and a contact surface of a contact portion for generating an arc. In an arc-extinguishing device having an insulator (1) covering other than the above and an insulator (2) arranged on both sides of a plane including a locus of a contact at the time of opening and closing or around the contact portion, the insulator (1) is claimed. The arc-extinguishing insulating material composition according to any one of Items 1 to 18, wherein the insulating portion (2) is defined by Claims 1 to 2.
7. An arc-extinguishing device (III) or the like characterized by comprising the arc-extinguishing insulating-material composition or the arc-extinguishing insulating-material molded product.

Among the arc extinguishing devices, the insulator (2) arranged on both sides of the plane including the locus of the contacts at the time of opening and closing or around the contact parts in the arc extinguishing device (II) or (III) is opened and closed. U-shaped arrangements that connect both sides of a plane including the locus of the contact point at one time and one ends of the arcs on both sides in the bending direction (for example, FIGS. 3, 4 and 6 to 1).
0) is preferable from the viewpoint of suitably achieving the effects of the present invention.

The use modes of the arc-extinguishing device of the present invention, the arc-extinguishing insulating material composition and the arc-extinguishing insulating material molded article of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an example of using the arc-extinguishing insulating material composition of the present invention and the arc-extinguishing device (III) of the present invention.
2 is an explanatory side view showing a closed state of the arc extinguishing device (II
FIG. 3 is a side view showing the open state of I), and FIG. 3 is a plan view showing the closed state of the arc extinguishing device (III).

In FIGS. 1, 2 and 3, the movable contact 4 is provided on the opening side of the movable contact 3 which opens and closes with the movable center 7 as a fulcrum, and the fixed contact 6 has a position corresponding to the movable contact 4 at one end. Is provided with a fixed contact 5, and an insulator (1) 1 having a thickness T1 and a thickness T surrounding the movable contact 4 and the fixed contact 5 so as to cover the periphery of the movable contact 4 and the fixed contact 5.
2, an insulator (2) 2 having a width W is provided.

The size of the movable contact 3 is, for example, 3 mm width × 5 mm thickness × 25 mm length, and the size of the movable contact 4 is
For example, it is 3 mm square × 2 mm thick, and the size of the insulator (1) is, for example, T1 is 0.8 to 1.0 mm, and the surface including the contact is 5 mm square (including the contact of 3 mm square).
And the length in the vertical direction with the 5 mm square is 5.8 to 6.0.
The size of the fixed contact 6 is, for example, 3 mm width × 5 mm thickness × 25 mm length, and the size of the fixed contact is 3 mm.
mm square × 2 mm thickness.

The dimension of the insulator (2) is such that T2 is 0.8 to
1.2mm, W 8-12mm, height 10-15m
m, preferably T2 is 0.8 to 1.0 mm, W is 8 to 1
In case of two layers, T2 is 1.
5 to 2.0 mm, the thickness of the layer to be arced is 0.5 to 1.0 m
m and W are 8 to 15 mm, and the height is 10 to 15 mm.

A distance N1 between the tip of the fixed contact and the insulator (2) is 2 to 8 mm, preferably 3 to 5 mm. The distance N2 between the side surface of the fixed contact and the insulator (2) is 2 to 5 m.
m, preferably 3-4 mm.

FIG. 4 is a plan view showing a closed state of the arc extinguishing device (III) of the present invention when the insulator (2) has two layers.

FIG. 15 is a plan view showing a closed state of the conventional arc extinguishing device.

As can be seen from FIGS. 3, 4 and 15,
In the arc-extinguishing device of the present invention, the distance N1 between the tip of the fixed contact and the insulator (2) and the distance N2 between the side surface of the fixed contact and the insulator (2) are closer to each other than those of the conventional arc-extinguishing device. You can see that you can.

As described above, downsizing of the arc-extinguishing device has become possible because of the arc-extinguishing insulating material composition or the arc-extinguishing insulating material molded body used in the insulators (1) and (2). This is because the performance has been greatly improved.

In the arc-extinguishing device (III), the insulator (1) is the arc-extinguishing insulating material composition according to any one of claims 1 to 18, and the contents thereof are the same as those already described. Therefore, it is omitted here. The arc-extinguishing insulating material composition according to claim 8 or 9, for example, a glass fiber having a total content of 1% or less of a metal compound of Group 1A of the periodic table, in which polyamide is nylon 6T, One or more selected from the group consisting of an inorganic mineral having a total content of the compound of the metal of the group 1A of Table 1A and 1% or less of the total content of the compound of the metal of the group 1A of the periodic table. The content of the filler of 10 to 55
%, Preferably 40 to 55%. The arc-extinguishing insulating material composition according to claim 1, 2, 3 or 6 is preferable in terms of heat resistance, arc wear resistance, pressure resistance and arc extinguishing performance.

The insulating part (2) is the arc-extinguishing insulating-material composition or the arc-extinguishing insulating-material compact as set forth in any one of claims 1 to 27, the contents of which are the same as those already described. Therefore, it is omitted here. The arc-extinguishing insulating material composition according to claim 10 or 11, for example, a glass in which polyamide is nylon 46 or nylon 66, and the total content of compounds of metals of Group 1A of the periodic table is 1% or less. Fibers, selected from the group consisting of inorganic minerals having a total content of compounds of the group 1A of the periodic table of 1% or less and ceramic fibers having a total content of compounds of the metals of the group 1A of the periodic table of 1% or less. The content of one or more fillers is 10 to 55%, preferably 30 to 40
%, The insulating material composition for arc extinguishing according to claim 1, 2, 3 or 6 is preferable from the viewpoint of arc extinguishing performance, pressure resistance strength, heat resistance and arc wear resistance.

In addition, the arc-extinguishing insulating material molded article according to any one of claims 22 to 24, for example, a glass fiber having a total content of a compound of a metal of Group 1A of the periodic table of 1% or less, a compound of a metal of a group 1A of the periodic table. Calcium carbonate, wollastonite or hydrous magnesium silicate with a total content of 1% or less, and Periodic Table 1
Matrix resin containing 20% or less of one or more fillers selected from the group consisting of aluminum silicate fibers, aluminum borate whiskers or alumina whiskers having a total content of Group A metal compounds of 1% or less. Of arc-extinguishing insulating material composition containing polyamide as a main component such as nylon 46 or nylon 66, or arc-extinguishing insulating material composition containing polyamide as a main component of unreinforced nylon 46 or nylon 66 The layer to be arced is composed of glass fibers, calcium carbonate, wollastonite or hydrous magnesium silicate or aluminum silicate fibers, aluminum borate whiskers or alumina, in which the total content of compounds of metals of Group 1A of the periodic table is 1% or less. 20 to more than one filler selected from the group consisting of whiskers
Contains 65%, matrix resin is polyolefin, polyolefin copolymer, nylon 46 or nylon 6
Polyamides such as 6, polyamide-based polymer blends,
Insulating material composition for arc extinguishing containing as a main component one selected from the group consisting of a thermoplastic resin or a thermosetting resin such as polyacetal, a polyacetal polymer blend and nylon 6T, nylon MXD6, polyethylene terephthalate or polybutylene terephthalate The arc-extinguishing insulating material molded body laminated in a layer consisting of
It is preferable in terms of pressure resistance and arc wear resistance.

Another mode of the arc extinguishing device is shown in FIG.
There are cases where the arc-extinguishing device (I) includes only the insulator (1) as shown in FIG. 11 and cases where the arc-extinguishing device (II) includes only the insulator (2) as shown in FIGS.

The present invention will be described in more detail based on the following specific examples. In the examples, the following breaking test, short circuit test and durability test were performed. (Breaking test) A circuit breaker including the arc-extinguishing device having the above-mentioned configuration is energized with a current six times the rated current (for example, 600 A in the case of a circuit breaker for 100 A) in a closed state, and the movable contact 4 and the fixed contact 5 And contact separation distance L (moving contact 4 and fixed contact 5
(Distance between) and 15 to 25 mm apart, an arc current is generated, and a test is passed when the arc current is interrupted a specified number of times. (Short-circuit test) In the closed state, an excess current of 10 to 100 kA is passed to open the movable contactor to generate an arc current, and a test is passed when the arc current is successfully interrupted and there is no damage. . (Durability test) Normal current (for example, 1
In the case of a circuit breaker for 00A, 100A) is energized, the movable contact is mechanically opened from this state, an arc current is generated, the arc current is successfully interrupted a specified number of times, and the arc extinguishing insulation is established. A test that passes the material's arc wear resistance (specifically, it has no holes). Examples 1 to 10 The arc-extinguishing device shown in FIGS. 1 to 3 was produced by using the arc-extinguishing insulating material composition shown in Table 1 as the insulator (1) and the insulator (2). Then, the breaking test, the short circuit test and the durability test were performed. The thicknesses T1 and T2 of the insulator (1) and the insulator (2) are both 1 mm, the width W of the insulator 2 is 10 mm, and the contact portions of the movable and fixed contacts are 3 × 3.
mm.

The content of the filler in the insulating material composition was 40% for the insulator (1) and 30% for the insulator (2).

As the test conditions, the breaking test is three-phase 720.
V / 600A, the short circuit test was three-phase 460V / 50kA, and the durability test was three-phase 550V / 100A.

Details of the matrix resin and the filler in the table will be described below. PA6T: Nylon 6T, Aren made by Mitsui Petrochemical Industry Co., Ltd. PA66: Nylon 66, Novamid made by Mitsubishi Kasei Co., Ltd. PA46: Nylon 46, Unitika Nylon 46 made by Unitika Ltd. PBT: Polybutylene terephthalate, Mitsubishi Kasei Corp.
Novadour melamine: melamine resin, Fuji Kasei Co., Ltd. U-CON GF-A: E glass (total amount of compounds of Group 1A metals such as sodium oxide and potassium oxide is 0.6%)
Made of fiberglass. Diameter 10 μm, average length 3 mm, Micro Glass CaCO ₃ manufactured by Nippon Sheet Glass Co., Ltd .: particle size (average) 1.8 μm, Japan Talc Co., Ltd. 3MgO / 4SiO ₂ H ₂ O: The composition formula shown on the left is the main component. Talc, particle size (average) 5 μm, manufactured by Nippon Talc Co., Ltd. 3MgO · 2SiO ₂ · 2H ₂ O: chrysotile mainly composed of the composition formula on the left, particle size (average) 3.5 μm, Japanese talc ( Ltd.) _{5MgO · 3SiO 2 · 3H 2 O} : Aston mainly those left composition formula, the average diameter of 1 [mu] m, average length 10 [mu] m,
Nippon Talc Co., Ltd. wollastonite: CaO.SiO ₂ , purity 97.4%, aspect ratio 20, average diameter 5 μm, Kinsei Matec Co., Ltd. aluminum silicate: aluminum silicate fiber, average diameter 5 μ
m, average length 50 μm Aluminum borate: Aluminum borate whiskers, average diameter 1
μm, average length 20 μm Alumina: Alumina whiskers, average diameter 1 μm, average length 1
0 μm Inorganic material: Aluminum phosphate 20%, Alumina 25
%, Zirconia 30%, aluminum hydroxide 10% and wollastonite 15% All the fillers had a total content of metal compounds of Group 1A of the periodic table of 1% or less.

[0193]

[Table 1] As is clear from Table 1, Comparative Example 1 (insulator (1),
In both (2), only an inorganic material is used without using an organic matrix resin) and 2, arc extinguishing performance is insufficient, and Comparative Example 3
In contrast, the pressure resistance is insufficient, while Examples 1 to 1
At 0, the number of successes in the breaking test was cleared 30 times, there was no problem in breaking and breaking in the short circuit test, and the durability test was 60.
It cleared the 00 times and passed. Examples 11 to 16 Arc-extinguishing devices were produced using the arc-extinguishing insulating material compositions shown in Table 2. In addition, the width W of the insulator (2) is 10 mm to 12
The apparatus is the same as the arc extinguishing apparatus used in Examples 1 to 10 except that the thickness is set to mm.

The content of the filler in the insulating material composition was 50% for the insulator (1) and 40% for the insulator (2).

The test conditions were the same as in Examples 1-10.

The details of the matrix resin and the filler in the table will be described below. PP: polypropylene, Mitsubishi Polypropylene manufactured by Mitsubishi Petrochemical Co., Ltd. EVOH: ethylene-vinyl alcohol copolymer (3
0:70), Soarlite polymethylpentene manufactured by Nippon Synthetic Chemical Industry Co., Ltd .: TPX manufactured by Mitsui Petrochemical Industry Co., Ltd.

[0197]

[Table 2] As can be seen from Table 2, in Examples 11 to 16, the number of successes in the breaking test was cleared 30 times, there was no problem in breaking and damage in the short circuit test, and the durability test was cleared 6000 times, which was a pass. It was In addition, in addition to those shown in Table 2, in the inorganic mineral of the insulator (2), 3MgO.4SiO ₂ .H ₂ O
Similar results were also obtained when hydrous magnesium silicate of 3MgO · 2SiO ₂ · 2H ₂ O or aluminum silicate fiber or alumina whisker was used as the ceramic fiber. Further, the glass fiber used in this example,
Insulator containing inorganic mineral or ceramic fiber (2)
Similar results were obtained when the content was 30%. Examples 17 to 24 Using the arc-extinguishing insulating material composition described in Table 3, Examples 1 to
An arc extinguishing device similar to that of No. 10 was manufactured.

The content of the filler in the insulating material composition was 50% for the insulator (1) and 30% for the insulator (2).

The test conditions were the same as in Examples 1-10.

[0200]

[Table 3] As can be seen from Table 3, in Examples 17 to 24, the number of successes in the breaking test was cleared 30 times, there was no problem in breaking and breakage in the short circuit test, and the durability test was cleared 6000 times, which was a pass. It was In addition to the inorganic minerals of the insulator (2) other than those shown in Table 3, 3MgO.4SiO ₂ .H ₂ O
Similar results were also obtained when hydrous magnesium silicate of 3MgO · 2SiO ₂ · 2H ₂ O or aluminum silicate fiber or alumina whisker was used as the ceramic fiber. Further, the glass fiber used in this example,
Insulating material containing inorganic mineral or ceramic fiber (1)
55%, 50%, 45%, 40%, 30%, Insulator (2) 55%, 40%, 35%, 30%, 20%, 10
Similar results were obtained with 10% to 55%, such as%. Examples 25 to 35 Using the arc-extinguishing insulating material composition described in Table 4, Examples 1 to 1
An arc extinguishing device similar to that of No. 10 was manufactured.

The content of the filler in the insulating material composition was 50% for the insulator (1) and 30% for the insulator (2).

The test conditions were the same as in Examples 1-10.

The details of the matrix resin and the filler in the table will be described below. PA66 / PP: A blend of 90 parts of nylon 66 and 10 parts of PP, wherein nylon 66 and PP are the same as those used in the above examples (and so on). PA66 / TPE: Nylon 66 90 parts, thermoplastic elastomer (olefin elastomer, Mitsui Petrochemical Industry Co., Ltd. Gudmer) 10 parts blend PA66 / EPR: Nylon 66 90 parts, ethylene-
Blend of 10 parts of propylene rubber Two types of fillers were used in Examples 29 to 35 in the table, and the mixing ratio was 1: 1 by weight.

[0204]

[Table 4] As can be seen from Table 4, in Examples 25 to 35, the number of successes in the breaking test was cleared 30 times, there was no problem in breaking and breaking in the short circuit test, and the durability test was cleared 6000 times. It was In addition to the results shown in Table 4, Example 25
In place of the glass fiber of the insulator (1) and / or (2), the inorganic mineral (3MgO.4SiO)
₂ · H ₂ O, 3MgO · 2SiO ₂ · 2H ₂ O or 5Mg
Similar results were obtained when using hydrous magnesium silicate O.3SiO ₂ .3H ₂ O or wollastonite CaO.SiO ₂ ) or ceramic fibers (aluminum silicate fibers, aluminum borate whiskers and alumina whiskers). . Further, the content of the glass fiber, the inorganic mineral or the ceramic fiber used in Examples 25 to 28 and the examples similar to the above Examples 25 to 28 is the insulator (1) 55.
%, 50%, 45%, 40%, 30%, insulator (2) 4
Similar results were obtained with 10% to 55%, such as 0%, 35%, 30%, 20%, 10%. Further, in Examples 29 to 35, nylon 66, a polymer blend of nylon 46 and nylon 66, polymethylpentene was used in place of nylon 46, or 3MgO.4SiO ₂ .H ₂ O in the inorganic mineral of the insulator (2).
Alternatively, a hydrous magnesium silicate of 3MgO · 2SiO ₂ · 2H ₂ O, or aluminum silicate fibers or alumina whiskers in the ceramic fibers, or glass fibers used in the above Examples 29 to 35 and similar examples. Insulator (1) containing inorganic mineral or ceramic fiber 55%, 50%, 45%, 40
%, Insulator (2) 40%, 35%, 30%, 10% and other 10% to 55%, similar results were obtained. Examples 36 to 38 Arc-extinguishing devices were produced using the arc-extinguishing insulating material compositions shown in Table 5. The arc-extinguishing device was the same as that used in Examples 1 to 10, except that the width W of the insulator (2) was set to 15 mm.

The content of the filler in the insulating material was 50% for the insulator (1) and 40% for the insulator (2).

The test conditions were the same as in Examples 1-10.

The details of the matrix resin and the filler in the table will be described below. POM / PA6: Blend of 30 parts of polyacetal (DURACON manufactured by Polyplastics Co., Ltd.) and 70 parts of nylon 6

[0208]

[Table 5] As can be seen from Table 5, in Examples 36 to 38, the number of success times of 30 times in the interruption test was cleared. In Examples 37 and 38, there was no problem in breaking and breaking in the short circuit test,
The durability test passed 6000 times and was passed. Examples 39 to 43 The arc-extinguishing insulating material composition described in Table 6 was used for the arced layer and the base layer of the insulator (2), and only the insulator (2) shown in FIGS. 12 and 13 was used. An arc device was made. Then, the breaking test, the short circuit test and the durability test were performed. The thickness T2 of the insulator (2) is 2 mm, the layer to be arced is 1 mm, and the width W of the insulator 2 is 12 mm. The contact portion of the movable and fixed contacts is 4 mm.
× 4 mm. This device is the case without the insulator (1).

[0209] The content of the filler in the insulating material is shown in the table.

As a test condition, the breaking test is three-phase 720.
V / 1500A, short circuit test is 3 phase 460V / 50kA,
The durability test was three-phase 550V / 225A.

[0211]

[Table 6] As can be seen from Table 6, in Examples 39 to 43, the number of successes in the breaking test was cleared 20 times, there was no problem in breaking and breaking in the short circuit test, and the durability test was cleared 4000 times and passed. It was In addition to the results shown in Table 6, similar results were obtained when nylon 46 was used instead of nylon 66 of the layer to be arced and the base layer. Examples 44 to 47 Example 39 using the arc-extinguishing insulating material composition described in Table 7
A device similar to ~ 43 was made. The content of the filler in the insulating material is shown in the table. The test conditions are from Example 39 to
The conditions were the same as for No. 43.

The details of the matrix resin and the filler in the table will be described below. PA / MXD6: Nylon MXD6, Rennie PET manufactured by Mitsubishi Gas Chemical Co., Ltd .: Polyethylene terephthalate, Mitsubishi Kasei Co., Ltd.
NOVAPET T-GF-A: T glass (total amount of compounds of Group 1A metals such as sodium oxide and potassium oxide is 0%)
Made of glass fiber, diameter 10 μm, length 3 mm, Nitto Boseki Co., Ltd.

[0213]

[Table 7] As can be seen from Table 7, in Examples 44 to 47, the number of successes in the breaking test was cleared 20 times, there was no problem in breaking and breaking in the short circuit test, and the durability test was cleared 4000 times, which was a pass. It was Similar results were obtained when nylon 46 was used instead of nylon 66 in the layer to be arced. Examples 48 to 52 An arc extinguishing device was produced using the insulating material composition for arc extinguishing described in Table 8. In addition, it is an apparatus similar to the arc extinguishing apparatus used in Examples 1 to 10.

The content of the filler in the insulating material composition is 50% for the insulating material (1) and the content of the insulating material (2) is shown in the table.

The test conditions are as follows: short-circuit test, three-phase, 460 V / 5.
This was repeated twice at 0 kA, and then the load-side interphase insulation resistance of the circuit breaker was measured.

Details of the fillers in the table will be described below. Mg (OH) ₂ : particle size 0.7 μm, Kyowa Chemical Co., Ltd. Kisuma 5 Al (OH) ₃ : Sumitomo Chemical Co., Ltd. Sb ₂ O ₅ : Nissan Chemical Co., Ltd. GF-C: diameter 10 μm , C glass powder, Micro Glass manufactured by Nippon Sheet Glass Co., Ltd.

[0217]

[Table 8] In addition, about Examples 48-52, the interruption | blocking test, the endurance test,
When a short circuit test was conducted, the circuit was cleared 30 times in succession in the breaking test, passed 6000 times in the durability test, and passed, and there was no problem in breaking or breaking in the short circuit test. Examples 53 to 57 and Comparative Examples 5 to 6 Using the arc-extinguishing insulating material compositions shown in Table 9, arc-extinguishing devices having only the insulator (1) shown in FIG. 11 were produced.

The size of the movable and fixed contacts is 3 × the contact portion.
3 mm (× 2 mm thickness), movable and fixed contacts have a size of 3 mm width × 5 mm thickness × 25 mm length, the insulator (1) has a size of T1 = 1 mm, and the surface including the contact is 5 mm square. The length in the vertical direction is 6 mm.

The content of the filler in the insulating material is shown in the table. As the test conditions, the breaking test is current / voltage = 3 phase 600 A / 720 V, contact opening distance 25 mm,
In the short circuit test, current / voltage = 3 phases 50 kA / 460 V, and contact opening distance was 25 mm.

[0220]

[Table 9] As can be seen from Table 9, in the examples, the number of success times of 30 times in the breaking test was cleared, and there was no problem in breaking and breaking in the short circuit test. Examples 58 to 66 and Comparative Example 7 An arc extinguishing device having only the insulator (2) shown in FIGS. 12 and 13 was produced using the insulating material composition for arc extinguishing described in Table 10.

Contact part of movable and fixed contacts 3 × 3 × 1 m
m thickness, movable and fixed contactor 3mm × 5mm × 25m
m, T2 = 1 mm, W = 12 mm.

The content of the filler in the insulating material is shown in the table. The test conditions are (shutdown = three-phase 720
V / 600A, contact opening 25mm), short circuit = 3 phase 460
V, 50 kA, contact opening 25 mm, (durability = 3 phase 550
V / 100A, contact opening 25 mm).

[0223]

[Table 10] After the short circuit test, measure the insulation resistance between the load side terminals using a DC resistance meter.

The test conditions in the following examples were the conditions shown below.

A switch including an arc-extinguishing device has a current (1 phase 420V / 600A or 1 phase 4 times 6 times the rated current in the closed state.
20V / 1500A) to separate the movable contact 4 and the fixed contact 5 at a contact separation distance L (distance between the movable contact 4 and the fixed contact 5) of 15 mm or 25 mm to generate an arc current and generate an arc current. In the shutoff test, which is passed when the specified number of times of shutoff succeeds, in the closed state, 1 phase 2
A short circuit test in which an excess current of 65 V / 25 KA is flowed to open the movable contactor to generate an arc current, and the arc current is successfully interrupted and there is no breakage, which is passed.
Alternatively, in the closed state, a three-phase 550V / 100A or three-phase 550V / 225A current is made to flow, and the movable contact is mechanically separated (L = 25 mm) from this state,
An endurance test that generates an arc current, succeeds in breaking the arc current by the specified number of circuits, and passes with the wear resistance (specifically, no holes) of the arc extinguishing insulating material. Examples 67-78 and Comparative Examples 8-11 Table 11 shows Examples 67-78 and Comparative Examples 8-11 of the present invention.
The insulation used for and the test results are shown. In Table 11, thicknesses T1 and T2 of the insulator (1) and the insulator (2)
Is 1 mm and the width W of the insulator (2) is 10 mm, and in the embodiment, the insulator (2) is made of nylon 46 or nylon 66 and 30 glass fibers (hereinafter referred to as GF) made of E glass.
%, The insulator (1) is made of nylon 6T with GF, inorganic mineral filler (CaCO ₃ , talc, aston, sepiolite, wollastonite) or ceramic fiber (aluminum silicate, which is an inorganic filler for plastic reinforcement). Aluminum borate and alumina) were contained at 30%.

In the comparative example, the insulator (1) or the insulator (2) was prepared by adding 30% of each GF to a modified melamine resin, PBT or liquid crystal polyester. (Test conditions) Break: 1 phase 420V / 600A, opening distance L = 15mm, endurance: 3 phases 550V / 100A, opening distance L = 15mm, short circuit: 1 phase 265V / 25kA, opening distance L = 25mm.

[0227]

[Table 11] As is clear from Table 11, the modified melamine resins of Comparative Examples 8 to 11 and the liquid crystal polyesters containing the respective GFs had a failure of blocking due to modification, and a decrease in the number of blockings in the blocking test and the number of durability tests. In contrast, the nylon 6T of Examples 67 to 78 containing the above-mentioned filler and the nylon 46 or nylon 66 containing GF had no breakage, and the number of times of successful blocking in the blocking test was 30 times. And passed the endurance test of 6000 times.

By including the above-mentioned filler in the high melting point nylon 6T, nylon 46 and nylon 66, the heat distortion temperature is raised and the mechanical strength is improved. Nylon 6T has a melting point of over 300 ° C., and as a filler for this nylon 6T, GF, inorganic mineral (CaCO ₃ , talc, aston, sepiolite, wollastonite) or a ceramic fiber which is an inorganic filler for plastic reinforcement is used. If one type of aluminum silicate, aluminum borate or alumina) is contained in an amount of 10% or more,
The heat distortion temperature rose. Nylon 6T with the above filler 1
When the content of 0% or more is used for the insulator (1), the arc-extinguishing action of the pyrolysis gas effectively works in addition to the rise of the heat distortion temperature, and good results are obtained.
Insulator (2) whose thermal condition is looser than that of insulator (1)
It can also be used for.

Nylon 6T, nylon 46 and nylon 66 have few or no aromatic rings,
The carbonization and free carbon are less scattered, and the insulation failure is reduced.

If the content of the above-mentioned filler exceeds 55%, the arc extinguishing performance tends to deteriorate, making it difficult to use. Examples 79 to 94 Table 12 shows the insulators used in Examples 79 to 94 of the present invention and the test results. In Table 12, the thickness T1 and T2 of the insulator (1) and the insulator (2) are 1 mm, the width W of the insulator (2) is 12 mm, and the insulator (1) contains 30% GF in nylon 6T. Insulated material (2) is nylon 46, nylon 66 or nylon 6
Blend of 6 and polypropylene (nylon 66 / propylene = 90/10), GF, inorganic mineral (Aston) which is an inorganic filler for plastic reinforcement, ceramic fiber (aluminum borate), GF mixed with aluminum borate A mixture containing 10 to 50% of a body or a mixture of aston and aluminum borate was used. (Test conditions) Break: 1 phase 420V / 600A, opening distance L = 15mm, endurance: 3 phases 550V / 100A, opening distance L = 15mm, short circuit: 1 phase 265V / 25kA, opening distance L = 25mm.

[0231]

[Table 12] As is clear from Table 12, G was used as the filler in the examples.
F, 10% to 50% of inorganic mineral (Aston), which is an inorganic filler for plastic reinforcement, ceramic fiber (aluminum borate) or a mixture thereof, passed the breaking test 30 times in the breaking test. , Durability test 6
Cleared 000 times and passed.

Wollastonite and sepiolite are
Aston is a fibrous inorganic filler having an excellent mechanical reinforcing effect, and aluminum silicate and aluminum whiskers are ceramic fibers having an excellent mechanical reinforcing effect, like aluminum borate whiskers. Similar effects were obtained by using wollastonite or sepiolite in place of aston and aluminum silicate or aluminum whiskers in place of aluminum borate whiskers. The sepiolite used had an average diameter of 0.1 μm and an average length of 2 μm and was manufactured by Nippon Talc Co., Ltd.

High melting point nylon 46 or nylon 66
By including the above filler alone or in the mixture, the heat distortion temperature rises and the mechanical strength improves. Nylon 46 and nylon 66 have high melting points of 290 ° C. and 260 ° C., respectively.
% Or more, the heat distortion temperature (according to test method ASTM-D648) is 285 ° C. (220 ° C. in the non-strengthened state) and 245 ° C. (100 in the non-strengthened state).
C.), and the effect is particularly large at 30% or more, so it is preferable to contain 30% or more. The content of the above-mentioned filler is limited to 55%, and if it exceeds this, the workability becomes poor and it becomes difficult to use. Examples 95 to 96 Table 13 shows the insulators used in Examples 95 to 96 of the present invention and the test results. In Table 13, the thickness T of the insulator (1) and the insulator (2) is 1 mm, and the width W of the insulator (2).
Is 12 mm, the insulation (1) is nylon 6T containing 50% GF, and the insulation (2) is nylon 6 in polyacetal and polymer blend (nylon 6 /
Polyacetal = 70/30), and GF
40% was included. (Test conditions) Break: 1 phase 420V / 600A, opening distance L = 15m
m, durability: 3 phase 550V / 100A, opening distance L = 15
mm, short circuit: 1 phase 265V / 25kA, opening distance L = 2
5 mm.

[0234]

[Table 13] As shown in Table 13, in the present example, the breaking test clears 30 times of breaking times, and the durability test is 3000 times, 600 times.
Cleared 0 times and passed.

Polyacetal and Nylon 6 are incompatible with each other. By polymer blending Nylon 6 with polyacetal, the insulator (2) can form the surface to be arced with polyacetal, and when exposed to high heat of arc, polyacetal Arc extinguishing gas can be generated from.
Arc extinguishing gas generated from polyacetal has a great arc extinguishing effect, and this arc extinguishing action improves the current limiting interruption performance. In addition, the heat distortion temperature is increased by polymer blending nylon 6, and even in a miniaturized arc-extinguishing device,
The mechanical strength to withstand the pressure rise due to the arc was obtained. Examples 97 to 101 Table 14 shows the insulators used in Examples 97 to 101 of the present invention and the test results. In Table 14, the thickness T of the insulator (1) and the insulator (2) is 1 mm, the width W of the insulator (2) is 12 mm, and the insulator (1) is made of nylon 6T and GF.
Containing 50% of the above, and the insulator (2) is nylon 46 containing 30% of GF or polyacetal containing nylon 6 polymer-blended.
Magnesium hydroxide, antimony pentoxide or aluminum hydroxide is added.

The test conditions were the same as in Examples 58-62.

[0237]

[Table 14] In this embodiment, the load-side interphase insulation resistance can be increased by one digit or more as compared with the additive-free one.

By the heat of the arc, aluminum hydroxide becomes alumina and H ₂ O, magnesium hydroxide becomes magnesium oxide and H ₂ O, antimony tetroxide becomes antimony trioxide and O ₂ or O, and antimony pentoxide. After decomposed into antimony tetroxide and O ₂ or O is decomposed into antimony trioxide and O ₂ or O. The H ₂ O or O ₂ or O obtained by this decomposition reacts with the metal vapor generated from the vicinity of the contact when the current is cut off and the free carbon generated from the insulator to generate metal oxide, carbon monoxide, or carbon dioxide. Since it is formed and the insulation failure is suppressed, the insulation failure does not occur even when used in a miniaturized arc-extinguishing device.

In this embodiment, nylon 66 or nylon 6T may be used instead of nylon 46. These materials can increase the load-side interphase insulation resistance by one digit or more as compared with the case of no addition. Examples 102 to 108 Table 15 shows the insulators used in Examples 102 to 108 of the present invention and the test results. In Table 15, using only the insulator (2), the thickness T2 is 1.5 mm and the width W is 10 mm.
The insulator (2) has a two-layer structure consisting of the layer to be arced (1 mm) and the base layer (0.5 mm) covering the outside. For the layer to be arced, nylon 46 or nylon 66 with a filler content of 20% or less, or unreinforced nylon 4
6 or nylon 66, the outer base layer is GF
Nylon 46, Nylon MXD reinforced by containing
6, PET or nylon 6T. (Test conditions) Break: 1-phase 420V / 1500A, opening distance L = 25m
m, durability: three-phase 550V / 225A, opening distance L = 25
mm, short circuit: 1 phase 265V / 25kA, opening distance L = 2
5 mm.

[0240]

[Table 15] As shown in Table 15, the short-circuit test did not cause damage to the insulator (2), cleared the number of successful interruptions of 20 in the interruption test, and passed the durability test with no holes.

The material for the base layer is nylon 46,
In addition to nylon MXD6, PET and nylon 6T,
Good test results were also obtained using modified polyphenylene oxide, polycarbonate, polyphenylene sulfide, polysulfone, polyether sulfone or polyether ketone reinforced with GF.

The filler used in the above examples is
Insulation resistance did not decrease even when exposed to arc heat, so an arc-extinguishing insulation material with high insulation resistance was obtained.

Although the arc-extinguishing insulating materials of Examples 102 to 108 exert a great effect when used for the insulator (2), they are also effective when used for the insulator (1). It was demonstrated.

[0244]

According to the invention of claims 1 to 13, the arc-extinguishing insulating material composition has a glass fiber in which the total content of the compounds of the metals of Group 1A of the periodic table is 1% or less, and the metal of the group 1A of the periodic table. Containing at least one filler selected from the group consisting of an inorganic mineral having a total content of compounds of 1% or less and a ceramic fiber having a total content of compounds of metals of Group 1A of the periodic table of 1% or less. However, since the main component of the matrix resin is one selected from the group consisting of polyolefin, polyolefin-based copolymer, polyamide, polyamide-based polymer blend, polyacetal and polyacetal-based polymer blend, arc extinguishing performance, pressure resistance and The arc wear resistance can be improved. Further, since the main component of these matrix resins is a thermoplastic resin, the molding time can be shortened as compared with a thermosetting resin which requires a curing time during molding.

In the inventions of claims 2 and 3, calcium carbonate, wollastonite or hydrous magnesium silicate is used as the inorganic mineral, and aluminum silicate fiber is used as the ceramic fiber.
Since aluminum borate whiskers or alumina whiskers are used, the arc extinguishing performance can be improved.

In the invention of claim 4, the polyolefin is
Since the specific gravity is polypropylene or polymethylpentene, the weight of the insulating material can be reduced. In particular, polymethylpentene is a crystalline resin having a melting point of 240 ° C., so that an insulating material composition having high heat resistance can be obtained.

According to the fifth aspect of the invention, since the polyolefin-based copolymer is an ethylene-vinyl alcohol copolymer which is a high-strength resin, it is possible to further improve the pressure resistance of the insulating material composition.

In the invention of claim 6, the polyamide polymer blend is a combination of polyamide and polyolefin, a combination of polyamide and thermoplastic elastomer, or a combination of polyamide and rubber.
Since the impact resistance is improved, the pressure resistance of the insulating material composition can be further improved.

According to the invention of claim 7, the polyamide is nylon 6T, nylon 46 or nylon 66 which is a crystalline polyamide having a high melting point, so that a high heat distortion temperature can be obtained and the heat resistance can be further improved. it can.

In the inventions of claims 8 and 9, the polyamide is
Since it is nylon 6T, which is a crystalline polyamide with a high melting point, a high heat distortion temperature can be obtained, and the heat resistance can be further improved, and at the same time, the total content of the metal compounds of Group 1A of the periodic table is 1 % Or less glass fiber, periodic table 1A
Inorganic minerals having a total content of compounds of group 1 metals of 1% or less and total content of compounds of metals of group 1A of the periodic table are 1
%, The content of at least one filler selected from the group consisting of ceramic fibers is 10 to 55%, and further 4
Since it is 0 to 55%, further improvement in arc wear resistance and pressure resistance can be achieved.

In the inventions of claims 10 and 11, since the polyamide is nylon 46 or nylon 66 which is a high melting crystalline polyamide, a high heat distortion temperature can be obtained.
The heat resistance can be further improved, and at the same time, the total content of the compound of the metal of Group 1A of the periodic table is 1% or less, and the total content of the compound of the metal of Group 1A of the periodic table is 1%. The content of one or more fillers selected from the group consisting of ceramic fibers having a total content of the following inorganic minerals and compounds of metals of Group 1A of the periodic table of 1% or less is 1
Since it is 0 to 55%, and further 30 to 40%, it is possible to improve arc wear resistance and pressure resistance. Furthermore, since nylon 46 and nylon 66 do not have an aromatic ring in their chemical structural formulas, surface carbonization by an arc is small, and the arc extinguishing property can be further improved.

According to the twelfth aspect of the invention, since the polyacetal polymer blend, which is a combination of a plastic which is incompatible with polyacetal and has a melting point higher than that of polyacetal and polyacetal, is the main component of the matrix resin, for example, the surface to be arced is When the layer is formed of a polyacetal rich layer, arc extinguishing performance is improved by the gas generated from the polyacetal by the arc. Further, it may have heat resistance higher than that of polyacetal depending on the material of the polymer blend partner. In addition, a glass fiber having a total content of compounds of a metal of Group 1A of the periodic table of 1% or less, an inorganic mineral having a total content of compounds of a metal of Group 1A of the periodic table of 1% or less, and a metal of a metal of Group 1A of the periodic table Since it contains one or more fillers selected from the group consisting of ceramic fibers having a total content of compounds of 1% or less,
The pressure resistance and arc wear resistance can be improved.

In the invention of claim 13, the polyacetal polymer blend is a combination of polyacetal and nylon 6, and in addition to the matters described in the invention of claim 12, nylon 6 has an aromatic ring in its chemical structural formula. Since it does not have, the carbonization of the surface by the arc is small, and the arc extinguishing property can be further improved.

In the fourteenth aspect of the invention, a polyacetal-based polymer blend, which is a combination of a thermoplastic resin which is incompatible with polyacetal and has a melting point higher than that of polyacetal, and polyacetal is the main component of the matrix resin. When the arc surface is formed of a polyacetal rich layer, the arc extinguishing performance is improved by the gas generated from the polyacetal by the arc. Further, it may have heat resistance higher than that of polyacetal depending on the material of the polymer blend partner. Therefore, it can be used as a good arc-extinguishing insulating material composition without containing the filler.

In the invention of claim 15, the polyacetal polymer blend is a combination of polyacetal and nylon 6, and in addition to the matters described in the invention of claim 12, nylon 6 has an aromatic ring in its chemical structural formula. Since it does not have, the carbonization of the surface by the arc is small, and the arc extinguishing property can be further improved. Therefore, it can be used as a good arc-extinguishing insulating material composition without containing the filler.

In the sixteenth aspect of the present invention, the arc extinguishing insulating material composition according to the first to fifteenth aspects is decomposed into H ₂ O by thermal decomposition.
Since a substance that generates O ₂ and O (atomic oxygen) is contained and the gas or the like generated by the decomposition of these suppresses the generation of free carbon, the arc extinguishing performance can be further improved.

In the seventeenth aspect of the invention, H is generated by thermal decomposition.
_The substances that generate ₂ O, O ₂ , and O (atomic oxygen) are aluminum hydroxide, magnesium hydroxide, antimony tetroxide, or antimony pentoxide. These are more preferable because they suppress the generation of free carbon. The arc performance can be further improved.

In the eighteenth aspect of the invention, H ₂ O, O ₂ and O
It contains a substance that generates (atomic oxygen), and the gas generated by decomposition of these suppresses the generation of free carbon, so it can be used in combination with a specific thermoplastic resin to further improve arc extinguishing performance. it can.

According to the inventions of claims 19 to 27, by forming the arc extinguishing insulating material molded body into two layers, a layer excellent in arc extinguishing property and a layer excellent in pressure resistance strength, arc wear resistance and heat resistance are formed. Can have.

In the inventions of claims 19 to 21, the arced layer of the arc-extinguishing insulating material molded body is a glass fiber having a total content of the metal compounds of Group 1A of the periodic table of 1% or less.
One or more selected from the group consisting of an inorganic mineral having a total content of a compound of a Group A metal of 1% or less and a ceramic fiber having a total content of a compound of a Group A metal of 1A or less Contains 20% or less of a filler, and the matrix resin contains, as a main component, one selected from the group consisting of polyolefin, polyolefin-based copolymer, polyamide, polyamide-based polymer blend, polyacetal and polyacetal-based polymer blend, or Since the main component is one selected from the group consisting of a reinforced polyolefin, a polyolefin-based copolymer, a polyamide, a polyamide-based polymer blend, a polyacetal and a polyacetal-based polymer blend, arc extinguishing performance can be improved.

According to a nineteenth aspect of the present invention, the arc extinguishing insulating material molded body contains 20 to 65 of one or more fillers selected from the group consisting of glass fibers, inorganic minerals and ceramic fibers.
%, The matrix resin is a polyolefin, a polyolefin-based copolymer, a polyamide, a polyamide-based polymer blend, a polyacetal and a polyacetal-based polymer blend. The arc consumability can be improved.

In the invention of claims 20 and 21, the arc extinguishing insulating material molded body contains nylon containing 20 to 65% of one or more fillers selected from the group consisting of glass fibers, inorganic minerals and ceramic fibers. 6T, nylon MXD
6. The layer to be arced is laminated on a layer containing a thermoplastic resin or a thermosetting resin such as polyethylene terephthalate or polybutylene terephthalate as a main component,
The pressure resistance and arc wear resistance can be improved. In particular, since nylon 6T has a higher melting point than nylon 46 and nylon 66, it is possible to further improve heat resistance.

In the twenty-second aspect of the invention, since the polyamide is nylon 46 or nylon 66 having no aromatic ring in the chemical structural formula, surface carbonization due to arc is small, and arc extinction is further improved. You can

In the inventions of claims 23 to 25, calcium carbonate, wollastonite or hydrous magnesium silicate is used as the inorganic mineral, and aluminum silicate fiber is used as the ceramic fiber.
Aluminum borate whisker or alumina whisker is used as the glass fiber for which the total content of the compound of the metal of Group 1A of the periodic table is not specified, and the glass fiber of which the total content of the compound of the metal of Group 1A of the periodic table is 1% or less is used. Therefore, arc extinguishing performance can be improved.

According to the twenty-sixth aspect of the present invention, the nineteenth to twenty-fifth aspects of the present invention are provided.
The arc-exposed layer of the arc-extinguishing insulating material molded article described above contains a substance that generates H ₂ O, O ₂ , and O (atomic oxygen) by thermal decomposition, and the gas or the like generated by these decompositions is free carbon. Since the generation is suppressed, the arc extinguishing performance can be further improved.

In the twenty-seventh aspect of the invention, H is generated by thermal decomposition.
_The substances that generate ₂ O, O ₂ , and O (atomic oxygen) are aluminum hydroxide, magnesium hydroxide, antimony tetroxide, or antimony pentoxide. These are more preferable because they suppress the generation of free carbon. The arc performance can be further improved.

According to a twenty-eighth aspect of the present invention, the arc-extinguishing device is miniaturized and the current is cut off by using the arc-extinguishing insulating-material composition or the arc-extinguishing insulating-material molded product according to any one of the first to twenty-seventh aspects. The performance can be improved.

According to a twenty-ninth aspect of the present invention, the insulator (1) for covering a portion other than the contact surface of the contact portion for generating an arc is defined by the first aspect.
By using the arc-extinguishing insulating material composition as described in any of 1 to 18, it is possible to reduce the size of the arc-extinguishing device and improve the current limiting interruption performance.

According to the invention of claim 30, for extinguishing an arc according to any one of claims 1 to 27, the insulator (2) arranged on both sides of the plane including the locus of the contact at the time of opening and closing or around the contact part. By using the insulating material composition or the arc extinguishing insulating material compact, it is possible to reduce the size of the arc extinguishing device and improve the current limiting interrupting performance.

According to a thirty-first aspect of the invention, there is provided an arc-extinguishing device having an insulator (1) for covering a portion other than a contact surface of a contact portion for generating an arc, wherein the arc-extinguishing insulation according to any one of the first to eighteenth aspects. The insulating material composition for arc extinguishing according to any one of claims 1 to 27, wherein the material (2) is used for the insulator (2) arranged on both sides of a plane including a locus of a contact at the time of opening and closing or around the contact portion. By using an object or a molded article of an arc extinguishing insulating material, it is possible to reduce the size of the arc extinguishing device and improve the current limiting interruption performance.

[Brief description of drawings]

FIG. 1 is an explanatory side view showing a closed state of an arc extinguishing device (III) according to the present invention.

FIG. 2 is a side view showing an open state of the arc extinguishing device (III) of the present invention.

FIG. 3 is an explanatory plan view showing a closed state of the arc extinguishing device (III) of the present invention.

FIG. 4 is an explanatory plan view showing a closed state of the arc extinguishing device (III) of the present invention in which the insulator (2) has a two-layer structure.

FIG. 5 is a perspective view illustrating an insulator (1) molded from the arc-quenching material composition of the present invention.

FIG. 6 is a perspective view illustrating an aspect of an insulator (2) formed of a single layer molded from the arc-quenching material composition of the present invention.

FIG. 7 is a perspective view illustrating another embodiment of an insulating material (2) composed of one layer molded from the arc-quenching material composition of the present invention.

FIG. 8 is a perspective view illustrating an aspect of an insulator (2) having two layers formed from the arc-quenching material composition of the present invention.

FIG. 9 is a perspective view illustrating another embodiment of an insulating material (2) composed of two layers molded from the arc-quenching material composition of the present invention.

FIG. 10 is a perspective view illustrating still another aspect of an insulator (2) having two layers formed from the arc-quenching material composition of the present invention.

FIG. 11 is an explanatory side view showing an open state of the arc extinguishing device (I) of the present invention having an insulator (1).

FIG. 12: Arc-extinguishing device (II) of the present invention having an insulator (2)
It is a perspective view showing the opened state of.

FIG. 13: Arc-extinguishing device (II) of the present invention having an insulator (2)
FIG. 3 is a side view showing the opened state of FIG.

FIG. 14 is a perspective view illustrating an arc generation state of a conventional arc extinguishing device.

FIG. 15 is an explanatory plan view showing a closed state of a conventional arc extinguishing device.

[Explanation of symbols]

1 Insulator (1), 2 Insulator (2), 3 Moving contact, 4 Moving contact, 5 Fixed contact, 6 Fixed contact, 7
Movable center of movable contact, 8 arc extinguishing device, 9 arc, 1
0 layer to be arced, 11 base layer.

Front page continuation (72) Inventor Mitsugu Takahashi 1-1-1, Tsukaguchihonmachi, Amagasaki City Mitsubishi Electric Corporation Central Research Laboratory (72) Inventor Takao Mitsuhashi 8-1-1 Tsukaguchihonmachi, Amagasaki City Mitsubishi Electric Corporation Central Inside the laboratory (72) Inventor Kazuharu Kato 8-1-1 Tsukaguchihonmachi, Amagasaki City Mitsubishi Electric Co., Ltd. Central Research Laboratory (72) Inventor Shinichi Yamaguchi 1-8 Midoricho, Fukuyama City Mitsubishi Electric Corporation Fukuyama Factory ( 72) Inventor Shunichi Katsube 1-8 Midoricho, Fukuyama-shi Fukuyama Works, Mitsubishi Electric Corporation

Claims (31)

[Claims] 1. A glass fiber having a total content of a metal compound of Group 1A of the periodic table of 1% or less, an inorganic mineral having a total content of a compound of a metal of Group 1A of the periodic table of 1% or less, and a periodic table 1A. Containing at least one filler selected from the group consisting of ceramic fibers having a total content of compounds of group I metals of 1% or less, and the main component of the matrix resin is polyolefin, polyolefin-based copolymer, polyamide An arc-extinguishing insulating material composition which is one selected from the group consisting of a polyamide-based polymer blend, a polyacetal, and a polyacetal-based polymer blend. 2. The arc-extinguishing insulating material composition according to claim 1, wherein the inorganic mineral is calcium carbonate, wollastonite or hydrous magnesium silicate. 3. The arc-extinguishing insulating material composition according to claim 1, wherein the ceramic fibers are aluminum silicate fibers, aluminum borate whiskers or alumina whiskers. 4. The arc-extinguishing insulating material composition according to claim 1, 2 or 3, wherein the polyolefin is polypropylene or polymethylpentene. 5. The arc-extinguishing insulating material composition according to claim 1, 2 or 3, wherein the polyolefin-based copolymer is an ethylene-vinyl alcohol copolymer. 6. The arc-extinguishing insulating material composition according to claim 1, wherein the polyamide-based polymer blend is a combination of polyamide and a polyolefin, a combination of polyamide and a thermoplastic elastomer, or a combination of polyamide and rubber. object. 7. The arc-extinguishing insulating material composition according to claim 1, wherein the polyamide is nylon 6T, nylon 46 or nylon 66. 8. A glass fiber in which the polyamide is nylon 6T and the total content of compounds of metals of Group 1A of the periodic table is 1% or less, and the total content of compounds of metals of Group 1A of the periodic table is 1% or less. The content of at least one filler selected from the group consisting of ceramic fibers having a total content of an inorganic mineral and a metal compound of Group 1A of the periodic table of 1% or less is 10 to 55%. The insulating material composition for arc extinguishing according to 2, 3, or 6. 9. A glass fiber, wherein the polyamide is nylon 6T, the total content of compounds of metals of Group 1A of the periodic table is 1% or less, and the total content of compounds of metals of Group 1A of the periodic table is 1% or less. The content of at least one filler selected from the group consisting of ceramic fibers having a total content of an inorganic mineral and a compound of a metal of Group 1A of the periodic table of 1% or less is 40 to 55%. The insulating material composition for arc extinguishing according to 2, 3, or 6. 10. A glass fiber in which the polyamide is nylon 46 or nylon 66, and the total content of the compounds of the metals of Group 1A of the periodic table is 1% or less, and the total content of the compounds of the metals of Group 1A of the periodic table is 1. %, The content of one or more fillers selected from the group consisting of ceramic fibers having a total content of inorganic minerals of 1% or less and a metal compound of Group 1A of the periodic table of 1% or less is 10 to 55%. Claim 1,
The insulating material composition for arc extinguishing according to 2, 3 or 6. 11. A glass fiber in which the polyamide is nylon 46 or nylon 66, and the total content of the compounds of the metals of Group 1A of the periodic table is 1% or less, and the total content of the compounds of the metals of Group 1A of the periodic table is 1. %, The total content of the inorganic mineral and the compound of the metal of Group 1A of the periodic table is 1% or less, and the content of one or more fillers selected from the group consisting of ceramic fibers is 30 to 40%. Claim 1,
The insulating material composition for arc extinguishing according to 2, 3 or 6. 12. The arc-extinguishing insulating material composition according to claim 1, wherein the polyacetal-based polymer blend is a combination of a polyacetal and a thermoplastic resin which is incompatible with the polyacetal and has a melting point higher than that of the polyacetal. object. 13. The arc-extinguishing insulating material composition according to claim 12, wherein the polyacetal-based polymer blend is a combination of polyacetal and nylon 6. 14. An arc-extinguishing insulating material composition which is incompatible with polyacetal and whose main component is a polyacetal-based polymer blend in which a thermoplastic resin having a melting point higher than that of polyacetal and polyacetal are combined. 15. The arc-extinguishing insulating material composition according to claim 14, wherein the thermoplastic resin which is incompatible with polyacetal and has a melting point higher than that of polyacetal is nylon 6. 16. A material which further generates H ₂ O, O ₂ and O (atomic oxygen) by thermal decomposition is further contained. 10, 1
The arc-extinguishing insulating material composition as described in 1, 12, 13, 14 or 15. 17. A substance which generates H ₂ O, O ₂ and O (atomic oxygen) by thermal decomposition is aluminum hydroxide,
The arc-extinguishing insulating material composition according to claim 16, which is magnesium hydroxide, antimony tetroxide or antimony pentoxide. 18. A matrix resin containing a substance capable of generating H ₂ O, O ₂ and O (atomic oxygen) by thermal decomposition and selected from the group consisting of nylon 6T, nylon 46 and nylon 66. An arc-extinguishing insulating material composition. 19. A glass fiber having a total content of a metal compound of Group 1A of the periodic table of 1% or less, an inorganic mineral having a total content of a compound of a metal of Group 1A of the periodic table of 1% or less, and a periodic table 1A. 20% or less of one or more kinds of fillers selected from the group consisting of ceramic fibers having a total content of compounds of group 1 metal of 1% or less, and a matrix resin of polyolefin, polyolefin-based copolymer, polyamide, A layer to be arced composed of an arc-extinguishing insulating material composition containing, as a main component, one selected from the group consisting of a polyamide-based polymer blend, polyacetal and a polyacetal-based polymer blend, or a non-reinforced polyolefin, a polyolefin-based copolymer, Polyamide, polyamide-based polymer blend, polyacetal and polyacetal-based polymer blend The arced layer composed of the arc-extinguishing insulating material composition containing one of the main components selected from the group consisting of the following two or more fillers selected from the group consisting of glass fibers, inorganic minerals or ceramic fibers: To 65%, and the matrix resin contains arc-extinguishing insulating material composition whose main component is one selected from the group consisting of polyolefin, polyolefin-based copolymer, polyamide, polyamide-based polymer blend, polyacetal and polyacetal-based polymer blend. An arc-extinguishing insulating material molded body laminated on a layer made of a material. 20. A glass fiber having a total content of a compound of a metal of Group 1A of the periodic table of 1% or less, an inorganic mineral having a total content of a compound of a metal of Group 1A of the periodic table of 1% or less, and 1A of the periodic table. 20% or less of one or more kinds of fillers selected from the group consisting of ceramic fibers having a total content of compounds of group 1 metal of 1% or less, and a matrix resin of polyolefin, polyolefin-based copolymer, polyamide, A layer to be arced composed of an arc-extinguishing insulating material composition containing, as a main component, one selected from the group consisting of a polyamide-based polymer blend, polyacetal and a polyacetal-based polymer blend, or a non-reinforced polyolefin, a polyolefin-based copolymer, Polyamide, polyamide-based polymer blend, polyacetal and polyacetal-based polymer blend The arced layer composed of the arc-extinguishing insulating material composition containing one of the main components selected from the group consisting of the following two or more fillers selected from the group consisting of glass fibers, inorganic minerals or ceramic fibers: The arc-extinguishing insulating material molded article, which is contained in a layer made of an arc-extinguishing insulating material composition containing a thermoplastic resin or a thermosetting resin as a main component. 21. A thermoplastic resin or a thermosetting resin,
21. The arc extinguishing insulating material molded article according to claim 20, which is nylon 6T, nylon MXD6, polyethylene terephthalate or polybutylene terephthalate. 22. The arc extinguishing insulating material molded article according to claim 19 or 20, wherein the polyamide in the layer to be arced and / or the layer not to be arced is nylon 46 or nylon 66. 23. The inorganic mineral in the layer to be arced and / or the layer not to be arced is calcium carbonate, wollastonite or hydrous magnesium silicate.
The arc extinguishing insulating material molded article according to 0, 21 or 22. 24. Arc extinguishing according to claim 19, 20, 21 or 22, wherein the ceramic fibers in the layer to be arced and / or the layer not to be arced are aluminum silicate fibers, aluminum borate whiskers or alumina whiskers. Insulation material molded body. 25. The glass fiber for which the total content of the compound of the metal of Group 1A of the periodic table is not defined is the glass fiber whose total content of the compound of the metal of Group 1A of the periodic table is 1% or less. 20, 21, or 22 arc-extinguishing insulating material molded article. 26. A material to generate H ₂ O, O ₂ , O (atomic oxygen) by thermal decomposition is contained in the layer to be arced 19, 20, 21, 22, 23, 24 or 2.
5. The arc extinguishing insulating material molded article according to 5. 27. A substance which generates H ₂ O, O ₂ and O (atomic oxygen) by thermal decomposition is aluminum hydroxide,
27. The arc-extinguishing insulating material molded article according to claim 26, which is magnesium hydroxide, antimony tetroxide or antimony pentoxide. 28. Claims 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24, 2
An arc-extinguishing device comprising the arc-extinguishing insulating-material composition or the arc-extinguishing insulating-material compact as described in 5, 26, or 27. 29. An arc-extinguishing device having an insulating material (1) for covering an area other than a contact surface of a contact portion for generating an arc, wherein the insulating material (1) is one of claims 1, 2, 3, 4, 5, 6. , 7,
8, 9, 10, 11, 12, 13, 14, 15, 16,
An arc extinguishing device, which is the insulating material composition for arc extinguishing according to 17 or 18. 30. An arc-extinguishing device having an insulator (2) arranged on both sides of a plane including a locus of a contact at the time of opening and closing or around a contact portion, wherein the insulator (2) is characterized in that
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1
3, 14, 15, 16, 17, 18, 19, 20, 2
An arc extinguishing device, which is the arc extinguishing insulating material composition or the arc extinguishing insulating material molded article according to 1, 22, 23, 24, 25, 26 or 27. 31. An insulator (1) for covering a portion other than a contact surface of a contact portion for generating an arc and an insulator (2) arranged on both sides of a plane including a locus of the contact at the time of opening and closing or around the contact portion. In the arc-extinguishing apparatus having, the insulator (1) is defined by claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1.
The arc-extinguishing insulating material composition according to any one of claims 1, 2, 13, 14, 15, 16, 17 or 18, wherein the insulating portion (2) is defined by Claims 1, 2, 3, 4, 5, 6, 7, or 7. 8, 9, 10, 1
1, 12, 13, 14, 15, 16, 17, 18, 1
An arc extinguishing device, which is the arc extinguishing insulating material composition or the arc extinguishing insulating material molded article according to 9, 20, 21, 22, 23, 24, 25, 26 or 27.