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Heat-resistant flame-retardant resin composition, insulated electric wire, and tube

A technology of flame retardant resin and composition, applied in plastic/resin/wax insulators, insulated cables, insulators, etc., can solve the problems of low mechanical strength of silicone rubber, weak intermolecular force, easy deformation of silicone rubber, etc., to achieve cost-effective Good, high cut-through performance, highly balanced insulation effect

Inactive Publication Date: 2014-06-04
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, compared with resin-coated electric wires having an insulating coating layer made of resin such as polyethylene, a fluororubber electric wire having an insulating coating layer made of a fluoroelastomer has a problem in terms of mechanical strength, specifically, There is a problem of low cut-through performance
In addition, fluoroelastomers have the following problems: when the insulating coating is formed by extrusion molding, the fluoroelastomers are not vulcanized immediately after extrusion, so they are easily deformed under load
However, silicone resins do not contain crystalline components and have very weak intermolecular forces
Therefore, compared with resin-coated electric wires coated with resin such as polyethylene, the mechanical strength of silicone rubber is low, specifically, its cut-through performance is low.
In addition, silicone rubber also has the following problem: Silicone rubber usually does not vulcanize immediately after extrusion, so it is easy to deform under load
Therefore, when the extruded silicone rubber is rolled up with a reel, the silicone rubber is easily deformed

Method used

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  • Heat-resistant flame-retardant resin composition, insulated electric wire, and tube
  • Heat-resistant flame-retardant resin composition, insulated electric wire, and tube
  • Heat-resistant flame-retardant resin composition, insulated electric wire, and tube

Examples

Experimental program
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Effect test

Embodiment 1 to 4 and comparative example 1 to 7

[0057] The components shown in Table I or II (expressed in parts by mass in the table) were kneaded with an open mill, and the kneaded mixture was granulated with a granulator. The obtained pellets were then supplied to an extruder for electric wire coating, through which they were then extruded onto a conductor of TA12 / 0.18. Thus, the conductor was covered so that the outer diameter of the insulation was 1.5 mmφ (thickness of the covering layer: 0.375 mm). Then, the obtained covered conductor was irradiated with an electron beam of 100 kGy using an electron beam irradiation apparatus. Thus, an insulated electric wire having an insulating coating composed of the crosslinked resin composition was produced. The tensile properties (tensile strength and tensile elongation), heat resistance, flexibility, flame retardancy, insulating properties and cut-through properties of the insulated wires produced as described above were evaluated by the methods described below. The results a...

Embodiment 5 to 8

[0081] The components shown in Table III (expressed in parts by mass in the table) were kneaded with an open mill, and the kneaded mixture was made into granules with a granulator. The obtained pellets were then supplied to an extruder for electric wire coating, through which they were then extruded onto a conductor of TA12 / 0.18. Thus, the conductor was covered so that the outer diameter of the insulation was 1.5 mmφ (thickness of the covering layer: 0.375 mm). Then, the obtained covered conductor was irradiated with an electron beam of 100 kGy using an electron beam irradiation apparatus. Thus, an insulated electric wire having an insulating coating composed of the crosslinked resin composition was produced. The tensile properties (tensile strength and tensile elongation), flexibility, flame retardancy, insulating properties and cut-through properties of the insulated wires produced as described above were evaluated by the same methods as in Examples 1 to 4. In addition, th...

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Abstract

Provided is a heat-resistant flame-retardant resin composition which is a resin composition made by blending an inorganic filler and / or a flame retardant to a mixture of a tetrafluoroethylene-alpha-olefin copolymer and a random polypropylene and by further irradiating the mixture with an ionizing radiation, the heat-resistant flame-retardant resin composition being characterized in that the mixing ratio between said tetrafluoroethylene-alpha-olefin copolymer and said random polypropylene is from 60:40 to 90:10 (mass ratio), the heat-resistant flame-retardant resin composition being inexpensive and having excellent insulating properties, heat resistance, flexibility, and flame retardancy as well as mechanical strength, such as cut-through properties and crimping workability, in a balanced manner. Also provided are an insulated electric wire having an insulating sheath made of said resin composition, and a tube made of said heat-resistant flame-retardant resin composition.

Description

technical field [0001] The present invention relates to a heat-resistant and flame-retardant resin composition constituting an electric wire covering material used in a high-temperature environment, an insulated wire having an insulating coating layer composed of the heat-resistant and flame-retardant resin composition, and the heat-resistant and flame-retardant A tube made of a resin composition. Background technique [0002] Wiring in appliances such as gas stoves, and wiring harnesses in car engine compartments, etc., are exposed to high temperatures. Therefore, as a material for insulating coatings of electric wires forming such wiring and harnesses, the resin composition needs to have not only high insulating properties but also high heat resistance and high flame retardancy. In addition, high flexibility is also required for wiring. In particular, in the case of wiring in electric appliances, flexibility is required. The insulating coating also needs to have high me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08K3/00C08L23/10H01B3/44H01B7/295
CPCC08K3/00C08L23/10C08L27/18H01B3/44H01B7/295H01B3/441H01B3/445C08K3/26C08K2003/265C08L23/12
Inventor 藤田太郎堀贤治西川信也萩田晃一
Owner SUMITOMO ELECTRIC IND LTD