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High temperature halogen-free flame retardant polypropylene/ethylene propylene terpolymer cable material and preparation method thereof

A technology of EPDM rubber and flame-retardant polypropylene, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of low heat resistance temperature and high hardness, and achieve low hardness, good flexibility, and extended use range. Effect

Active Publication Date: 2009-04-29
中广核三角洲(江苏)塑化有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a soft high-temperature halogen-free flame-retardant polypropylene / EPDM rubber cable material, aiming to solve the problems of high hardness and low heat-resistant temperature of the existing halogen-free low-smoke flame-retardant cable material

Method used

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  • High temperature halogen-free flame retardant polypropylene/ethylene propylene terpolymer cable material and preparation method thereof

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Embodiment 1～5

[0066] Preparation method: According to the formula in Table 1, polypropylene, EPDM rubber, ammonium polyphosphate, silicone, cross-linking agent and other additives were mixed in a plastic mixing pot for 5 minutes, and the mixture was extruded from the twin-screw The main feeding port of the machine is added, the feeding rate is 50 kg / hour, and the rubber oil is added from the middle area of ​​the twin-screw to adjust the hardness of the product to the set value. The diameter of the twin-screw extruder is 65 mm, the length-to-diameter ratio is 48, the temperature control range is 140° C. to 200° C., and the screw speed is controlled at 290 rpm. The properties of the products obtained are shown in Table 2.

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Abstract

The invention relates to a high-temperature halogen-free flame-retardant polypropylene / ethylene propylene diene rubber cable material and a preparation method thereof. The cable material comprises the following components in weight portion: 10 to 25 portions of polypropylene, 25 to 40 portions of ethylene propylene diene rubber, 30 to 40 portions of ammonium polyphosphate, 1 to 3 portions of silicone, 5 to 20 portions of rubber oil, 0.3 to 1.0 portion of cross linker, 0.2 to 2.5 portions of cross linking assistant, and 0.5 to 1.5 portions of processing assistant. The cable material is obtained through dynamic vulcanization, extrusion and granulation by a double-screw extruder. The cable material can pass a hot air ageing test at a temperature of 150 DEG C, can be used for a long term at a temperature of 125 DEG C, and is flexible and environment-friendly.

Description

technical field [0001] The invention relates to a cable material and a preparation method thereof, in particular to a soft environment-friendly high-temperature halogen-free flame-retardant polypropylene / EPDM cable material and a preparation method thereof. Background technique [0002] Flame-retardant wire and cable materials can generally be divided into: ordinary flame-retardant wire and cable materials, low-halogen flame-retardant wire and cable materials and halogen-free flame-retardant wire and cable materials. At present, my country's flame-retardant wire and cable materials are mainly halogen-containing flame-retardant products. This kind of wire and cable materials release a large amount of smoke and corrosive halides when burned, causing casualties and corroding various equipment, resulting in the so-called " Second Disaster". In order to achieve the purpose of low smoke, low toxicity and flame retardancy, many manufacturers at home and abroad are committed to the ...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K13/02C08K3/32C08J3/24H01B3/44H01B7/295C08L23/12
Inventor 徐红岩
Owner 中广核三角洲(江苏)塑化有限公司
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