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Non-halgen flame retardant wire

A wire and halogen technology, applied in the field of halogen-free flame-retardant wires, can solve the problems of mechanical properties and electrical properties decline, and achieve the effects of inhibiting mutual adhesion, improving tensile strength, and improving withstand voltage.

Inactive Publication Date: 2009-02-04
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the other hand, if the mixing amount of the flame retardant is increased in order to improve the flame retardancy, the mechanical properties and electrical properties will be reduced.

Method used

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  • Non-halgen flame retardant wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Conductor: tinned annealed copper wire (AWG24, conductor structure 7 / 0.203, outer diameter 0.61mm)

[0036] ・Electric insulator: 100 parts by weight of EVA with a VA content of 70%

[0037] (Inner layer) 20 parts by weight of maleic anhydride modified EEA (modification rate 25%)

[0038] 180 parts by weight of magnesium hydroxide

[0039] Antioxidant 2 parts by weight

[0040] Layer thickness 0.42mm

[0041] ・Electrical insulator: 100 parts by weight of EVA with a VA content of 50%

[0042] (outer layer) 180 parts by weight of magnesium hydroxide

[0043] Antioxidant 2 parts by weight

[0044] Layer thickness 0.13mm

[0045] The electric wire of the above-mentioned Example 1 meets the prescribed flame retardancy standard (UL VW-1), and at the same time, the voltage resistance reaches 13kV (1 minute), the elongation rate is 170%, and the tensile strength is 11.5MPa, so it satisfies the prescribed v...

Embodiment 2

[0046] (Example 2: the thickness of the inner layer and the outer layer is the same)

[0047] Conductor: tinned annealed copper wire (AWG24, conductor structure 7 / 0.203, outer diameter 0.61mm)

[0048] ・Electric insulator: 100 parts by weight of EVA with a VA content of 70%

[0049] (Inner layer) Maleic anhydride modified EEA (modification rate 25%) 20 parts by weight

[0050] 180 parts by weight of magnesium hydroxide

[0051] Antioxidant 2 parts by weight

[0052] Layer thickness 0.27mm

[0053] ・Electrical insulating layer: 100 parts by weight of EVA with a VA content of 50%

[0054] (outer layer) 180 parts by weight of magnesium hydroxide

[0055] Antioxidant 2 parts by weight

[0056] Layer thickness 0.27mm

[0057] The electric wire of the above-mentioned Example 2 is an example when the thickness of the inner layer and the outer layer are made the same in Example 1, and it meets the prescribed ...

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Abstract

The invention provides a halogen free flame retardant electronic wire that has excellent characteristics of flexibility and voltage resistance by optimizing resin match in an electrical insulator formed by an inner and an outer layer. The halogen free flame retardant electronic wire insulates in periphery of a conductor (2) by an electrical insulator (5) formed by an inner and an outer layer (3, 4). The inner layer (3) is formed by adding improved ethylene / ethyl acrylate polymer by maleic anhydride of 5 weight parts to 40 weight parts and metal hydroxids (improving rate of the maleic anhydride is 1% to 40%) in 100 weight parts of ethylene / ethyl acrylate polymer with content of vinyl acetate is more than or equal to 60% but less than or equal to 80%. The outer layer (4) is formed by adding metal hydroxids in the ethylene / ethyl acrylate polymer with content of vinyl acetate is more than or equal to 30% but less than or equal to 60%. In addition, thickness of the formed outer layer (4) is greater than that of the inner layer (3).

Description

technical field [0001] The present invention relates to a halogen-free flame-retardant electric wire, which is formed of a halogen-free insulating resin composition used in internal wiring of electric equipment, etc., and has flexibility and voltage resistance. Background technique [0002] In recent years, in order to solve environmental problems, halogen-free flame-retardant resin compositions that do not generate harmful halogen gases such as dioxins during combustion have been developed and used as insulating coating materials for electric wires and cables. As a halogen-free flame-retardant resin composition, it is known to mix ethylene-vinyl acetate copolymer (EVA) or maleic anhydride-modified ethylene-ethyl acrylate copolymer (maleic anhydride-modified EEA). A composition comprising a metal hydroxide as a flame retardant (for example, refer to Patent Document 1). [0003] On the other hand, if the blending amount of the flame retardant is increased in order to improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/295H01B3/44
CPCH01B3/44H01B7/0208H01B7/295
Inventor 远藤哲八木泽丈小林清英
Owner SUMITOMO ELECTRIC IND LTD
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