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Heat-resistant flame-retardant rubber composition, insulated wire and rubber tube

A technology of flame-retardant rubber and composition, applied in the fields of rubber tube, heat-resistant and flame-retardant rubber composition, and insulated wire, can solve the problems of low cut-through performance, low shape recovery performance and deformation of silicone rubber, and achieve high and low temperature characteristics, Highly balanced mechanical strength, high wear resistance effect

Active Publication Date: 2015-09-09
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cut-through performance of silicone rubber is particularly low
In addition, silicone rubber has a problem that it is in a non-crosslinked state immediately after being extruded, it is easily deformed by a load, and it does not return to its original shape due to its low shape recovery performance
Therefore, as with the above-mentioned fluoroelastomers, an expensive dedicated rubber extrusion line is required

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 7 and comparative example 1 to 4

[0052] The ingredients shown in Table I and Table II (expressed in parts by mass in the table) were kneaded with an open mill, and granulated with a granulator. The stickiness of the pellets was evaluated by the following method. The obtained pellets were supplied to an extruder for covering electric wires, which were extruded to a conductor (copper wire; conductor diameter: 0.95 mm) of 0.5 SQ (TA 19 / 0.19) to form a covering having a thickness of 0.375 mm. layer, thereby obtaining a wire with an overall diameter of 1.7 mm.

[0053] Next, an electron beam of 100 kGy was irradiated with an electron beam irradiating apparatus, thereby producing an insulated wire insulatingly covered with a crosslinked rubber composition. The insulated wire (or its insulating coating) obtained in the above manner was evaluated for tensile properties (tensile strength and tensile elongation), flexibility, heat resistance, flame retardancy, insulation, oil resistance by the following methods Evalu...

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Abstract

The invention offers a heat-resistant flame-retardant rubber composition having low adhesiveness even in an uncrosslinked state, an insulated wire having an insulating covering composed of the heat-resistant flame-retardant rubber composition, and a rubber tube composed of the foregoing heat-resistant flame-retardant rubber composition. The heat-resistant flame-retardant rubber composition is formed by mixing 10 to 100 mass parts of an inorganic filler with 100 mass parts of a mixture produced by mixing (A) a vinylidene fluoride-hexafluoropropylene-based copolymer rubber and / or a vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene-based copolymer rubber and (B) polyvinylidene fluoride at a mass ratio of 90:10 to 60:40. The insulated wire has an insulating covering composed of the rubber composition and irradiated with ionizing radiation. The rubber tube is composed of the foregoing heat-resistant flame-retardant rubber composition and irradiated with ionizing radiation.

Description

technical field [0001] The invention relates to a heat-resistant and flame-retardant rubber composition capable of forming a highly balanced excellent mechanical strength, high wear resistance, high heat resistance, high flame retardancy, high oil resistance, High insulation, high flexibility, and low-temperature characteristics of insulating coating, etc.; the rubber composition has low tack; therefore, the rubber composition is less prone to blocking when pelletized. The present invention relates to an insulated wire having an insulating coating composed of the above-mentioned heat-resistant and flame-retardant rubber composition, and the insulated wire can be advantageously used as an electric wire of a machine wired in a high-temperature environment, for example, an automobile Wiring harnesses in the engine compartment or automatic transmission. The present invention relates to a rubber tube formed of the above-mentioned heat-resistant and flame-retardant rubber compositi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16B32B25/04B32B27/30C08K3/26C08K3/34C08L27/18C08L27/20F16L11/04H01B3/00H01B3/44H01B7/02H01B7/295H01B17/58
CPCC08K2003/265H01B7/295F16L11/04H01B3/445C09D127/16H01B3/443F16L11/125H01B3/28C08K3/34C08L27/16C08K3/26C08L2205/025C08K3/013Y10T428/1386Y10T428/2933
Inventor 藤田太郎早味宏西川信也越智祐司户泽仁宏
Owner SUMITOMO ELECTRIC IND LTD
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