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Flame-retardant resin composition, and insulated electric wire, flat cable, and molded article, which are made using same

A resin composition, flame retardant technology, applied in the direction of insulated cables, flat/ribbon cables, plastic/resin/wax insulators, etc., can solve problems such as dyeing of insulating layers, and achieve the effect of high heat resistance

Inactive Publication Date: 2012-07-11
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is also the problem of the insulating layer being stained by red phosphorus

Method used

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  • Flame-retardant resin composition, and insulated electric wire, flat cable, and molded article, which are made using same
  • Flame-retardant resin composition, and insulated electric wire, flat cable, and molded article, which are made using same
  • Flame-retardant resin composition, and insulated electric wire, flat cable, and molded article, which are made using same

Examples

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Effect test

example

[0062] Next, the present invention will be described in further detail by using examples. The following examples do not limit the scope of the invention. It should be noted that "parts" in the tables mean "parts by mass" unless otherwise specified.

[0063] First, the measurement and evaluation methods performed in the following examples will be described.

[0064] (Mechanical behavior)

[0065] Tensile tests were performed on the covering layers of insulated wires and flat cables (tensile speed = 500 mm / min, distance between marked lines = 20 mm). Three samples were used to measure tensile strength (MPa) and elongation at break (%), and their average values ​​were calculated. A tensile strength of 10.4 MPa or more and an elongation at break of 150% are set as acceptable levels.

[0066] (heat resistance)

[0067] The insulated wires and flat cables were placed in a Geer oven set at 158° C. for 168 hours (7 days), and then subjected to the same tensile test as that used t...

Embodiment 1 to 19 and comparative example 1 to 10

[0075] The materials were blended in the proportions shown in Tables I to III. To each of the obtained mixtures, 0.5 parts of oleic acid amide and 3 parts of tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] were added to 100 parts of the base polymer pentaerythritol ester, and the resulting mixture was kneaded using a twin-screw extruder with a die set at a temperature of 280°C. The obtained kneaded strands were pelletized with a pelletizer, and extruded using a melt extruder (diameter 45 mm, L / D ratio = 24, compression ratio: 2.5, full screw type) to coat the conductor (the prepared by twisting 17 tinned annealed copper wires with a diameter of 0.16 mm) so that the thickness of the coating layer on the conductor was 0.4 mm. Subsequently, an electron beam of 250 kGy was applied at an accelerating voltage of 2 MeV to form an insulated wire. In Examples 8 and 9, a conductor prepared by twisting 7 tinned annealed copper wires having a diameter of 0.16 mm was used, ...

Embodiment 20 to 22 and comparative example 11 to 18

[0077] The flame retardant resin compositions shown in Tables IV and V were used. Eight conductors (flat rectangular conductors with a thickness of 0.15 mm and a width of 1.2 mm) were arranged side by side at a pitch of 0.8 mm (pitch: 2.0 mm), and each flame-retardant resin composition was extruded to coat both sides of the conductors , so that the thickness of the covering layer is 0.2 mm. Subsequently, an electron beam of 250 kGy was applied at an acceleration voltage of 2 MeV to form a flat cable. Subsequently, a series of evaluations are performed.

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Abstract

Provided is a flame-retardant resin composition which combines excellent mechanical characteristics and flame retardance and which can satisfy severe heat resistance requirement such as heat resistance requisite to the resin in contact with a conductor. Also provided are an insulated electric wire, a flat cable, and a molded article, which are made using the same. A flame-retardant resin composition which comprises a thermoplastic resin, a polyfunctional monomer and an organophosphorus flame retardant, wherein the thermoplastic resin contains at least 5% by mass (relative to the total amount of the thermoplastic resin) of either a resin that has a carbon-carbon unsaturated bond or a resin that has a carbonyl group, and the organophosphorus flame retardant is at least one compound selected from the group consisting of metal phosphinates, melamine phosphate compounds, ammonium phosphate compounds, and polyphosphazene compounds prepared by ring-opening polymerization of cyclophosphazenes, with the content of the organophosphorus flame retardant being 5 to 100 parts by mass per 100 parts by mass of the thermoplastic resin and the content of the polyfunctional monomer being 1 to 20 parts by mass per 100 parts by mass of the thermoplastic resin.

Description

technical field [0001] The present invention relates to a flame-retardant resin composition composed of a halogen-free flame-retardant material and having high flame retardancy and mechanical properties, and insulated wires, flat cables, and molded articles produced using the composition. Background technique [0002] The insulating coatings of insulated electric wires and the insulating layers of flat cables used in the fields of electronic devices and automobiles are required to exhibit good mechanical properties. For example, according to US UL standards widely adopted in the field of electronic devices, insulated wires and flat cables using plastics such as polyethylene as insulators are required to have an initial maximum tensile strength of 10.4 MPa or more. Insulated wire and flat cables are also used in applications requiring high flame resistance. Generally, the flame retardancy is specified by a horizontal flame retardancy test and an inclined flame test in the au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08K3/32C08K5/3477C08K5/521C08K5/5313C08L85/02H01B3/42H01B3/44H01B7/08H01B7/295
CPCC08L85/02H01B3/28H01B3/427C08K5/0066H01B7/295C08K5/49C08G79/02H01B3/442C08K5/16C08L101/00H01B3/42H01B7/08
Inventor 森内清晃早味宏
Owner SUMITOMO ELECTRIC IND LTD
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