Flame-retardant resin composition, insulating electric wire and wire harness
A technology of flame retardant resin and composition, applied in the direction of insulated cables, insulators, insulated conductors, etc., can solve the problems of increased manufacturing cost and expensive magnesium hydroxide, and achieve high reliability, excellent flexibility, and suppression of deterioration. Effect
Inactive Publication Date: 2009-10-14
AUTONETWORKS TECH LTD +2
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Problems solved by technology
In addition, magnesium hydroxide synthesized from seawater is expensive, so there is a problem that the production cost increases
Method used
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preparation example Construction
[0082] Preparation of flame retardant composition and insulated wire
[0083] First, the components shown in the table below were kneaded at a mixing temperature of 250° C. using a twin-screw extruder, and pelletized using a pelletizer. Thus, the flame-retardant resin composition of the example and the flame-retardant resin composition according to the comparative example were obtained. Then, using a 50mm extruder, a conductor (cross-sectional area: 0.5mm 2 ) (which is an annealed copper strand prepared by twisting seven annealed copper electric wires) was extruded to have a thickness of 0.25 mm, thereby preparing insulated wires of Examples and Comparative Examples.
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Abstract
A flame-retardant resin composition which is inexpensive and is excellent in cold resistance, wear resistance and hot water resistance; and an insulating electric wire and a wire harness both utilizing the composition. Specifically disclosed is a flame-retardant resin composition which comprises a propylene polymer containing an ethylene unit in an amount of 1 to 15 wt% and magnesium hydroxide produced by using a natural mineral as a raw material. The composition preferably contains magnesium hydroxide in an amount of 50 to 200 parts by weight relative to 100 parts by weight of the polymer component in the composition. Further, the composition preferably contains a styrene-based thermoplastic elastomer. The propylene polymer preferably has a Charpy impact value of 3 to 8 KJ / m at -20 DEG C. An insulating electric wire can be produced by coating the outer region of a conductive material with the flame-retardant resin composition. A wire harness can be produced by using the insulating electric wire.
Description
technical field [0001] The present invention relates to a flame retardant resin composition, an insulated wire and a wire harness, and more particularly to a flame retardant resin composition, an insulated wire and a wire harness suitable as a coating material for an insulated wire used in automobiles and electric / electronic equipment. Background technique [0002] Generally, as a covering material for insulated wires used for wiring of automobiles and electric / electronic equipment parts, a vinyl chloride resin composition to which a halogen-containing flame retardant is added is widely used. [0003] However, there is a problem that the vinyl chloride resin composition includes halogen elements so that it emits harmful halogen-containing gas into the atmosphere in the case of a vehicle fire or in the burning of electrical / electronic devices by incineration, causing environmental pollution. [0004] From the viewpoint of reducing the global environmental burden, olefin resin...
Claims
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IPC IPC(8): C08L23/14C08K3/22C08L53/02H01B7/00H01B7/295
CPCH01B7/295C08K3/22C08L23/14H01B3/441C08L53/02C08L23/10C08L2201/02C08L53/025C08L53/00C08L2666/04C08L2666/24C08L2666/02
Inventor 岛田达也野中毅井上正人
Owner AUTONETWORKS TECH LTD
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