Low-smoke, halogen-free and flame-retardant polyester elastomer thin-wall insulating material and preparation method thereof

Abstract

The invention discloses a low-smoke, halogen-free and flame-retardant polyester elastomer thin-wall insulating material and a preparation method thereof. The insulating material mainly comprises the following components in parts by weight: 60-80 parts of polyester elastomer, 20-30 parts of nanocomposite flame retardant, 2-5 parts of anti-hydrolysis stabilizer, 1-2 parts of main antioxidant, 0.3-0.5 part of auxiliary antioxidant and 2-5 parts of lubricant. The method comprises the following steps of: uniformly mixing each component of the low-smoke, halogen-free and flame-retardant polyester elastomer thin-wall insulating material in a mixer at the temperature of 125 DEG C; and extruding and pelletizing in a double screw extruder. According to the insulating material, degradation and carbonization of acids are prevented, degradation and brittleness of the polyester elastomer in a high-heat and moist heat environment are eliminated by using the amine anti-hydrolysis stabilizer, long-term aging performance is ensured by using the special high-temperature-resistant antioxidant, the insulating performance is improved by blending polyolefin resin, and smooth and fine product appearance are ensured by using the special lubricant.

Description

1. Technical field [0001] The invention relates to a wire and cable material and a preparation method thereof, in particular to a low-smoke, halogen-free, flame-retardant polyester elastomer thin-wall insulating material used for rail transit locomotive vehicle cables and automobile wires and a preparation method thereof. 2. Background technology [0002] At present, with the rapid development of high-speed railway, urban rail transit and automobile industry, the introduction of EU ROHS and REACH environmental protection regulations and the need for safety, the requirements for cables for rail transit (high-speed trains, subways) and automotive wiring harnesses are getting higher and higher. It is required to meet GB / T 12528, TB / T 1484, ES EN 50306 and other rolling stock cable standards and QC / T 730, ISO 6722, Japanese JASC 3406 and JASO D611, American SAE 1678, German DIN 72551, French NF R13414, etc. Automotive Wire Standard. [0003] The above standards not only require...

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Problems solved by technology

[0003] The above standards not only require cables to be safe, environmentally friendly, and energy-saving, but also specifically require high-temperature resistance to 125°C, wear resistance, oil resistance, halogen-free, cold resistance, high strength, and flame retardancy. (0.25mm), while traditional polyvinyl chloride (PVC), flame-retardant polyolefin materials, and fluorine-containing materials can no longer meet the requirements. Only low-smoke, halogen-free, flame-retardant polyester elastomer insulating materials can meet the above requirements.

[0004] At present, low-smoke, halogen-free, flame-retardant polyester elastomer thin-walled insulation materials have the following shortcomings: 1. The aging performance of high temperature aging at 158°C and 168 hours is unqualified; 2. The processing safety is poor and easy to degrade; 3. The insulation performance is poor and the volume resistance is low. 4. The flame retardant performance is difficult to reach the UL94 V-O level

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