High-flame-retardant and halogen-free polyolefin cable material and preparation method thereof

Abstract

The invention discloses a high-flame-retardant and halogen-free polyolefin cable material and a preparation method thereof. The high-flame-retardant and halogen-free polyolefin cable material comprises the following components in parts by weight: 20-70 parts of ethylene copolymer, 5-30 parts of polyethylene, 10-60 parts of metal hydroxide, 3-20 parts of organic phosphate flame retardant, 3-30 parts of melamine compound, 4-10 parts of compatilizer and 2-5 of other additives. The preparation method comprises the following steps of: (1) firstly putting granular materials into a high-speed mixing machine, adding liquid additive after stirring for 30 seconds at low speed, mixing for 3 minutes at high speed, then stopping, adding the granular materials, mixing for 3 minutes at high speed, then stopping and obtaining premixed materials; and (2) adding the premixed materials into a mixer for mixing for 15 minutes, then mixing by double screws with same directions, finally extruding by single screw, carrying out air cooling, hot cutting and granulation, wherein the extruding temperature is set between 90-130 DEG C.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant cable material, in particular to a highly flame-resistant halogen-free polyolefin cable material and a preparation method thereof. Background technique [0002] With the rapid development of the economy, wires and cables are widely used in various industries. With the frequent occurrence of electrical fire accidents, the flame retardant problem of wires and cables has attracted the attention of countries all over the world. Traditional flame-retardant cable materials mainly use PVC and polyolefin with halogen-antimony flame retardants added. When the cable burns, it releases a lot of smoke and toxic gases, which hinders people's safe evacuation and fire fighting work in a fire, and damages life and property. to serious losses. [0003] In recent years, the European Union has successively introduced RoHS Directive, WEEE Directive, REACH Directive and EuP Directive and other related directives. The...

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Problems solved by technology

The flame retardant efficiency of the product prepared by the first method is low. To achieve a better flame retardant effect, the amount of inorganic flame retardant added should be at least 65%. A large amount of fillers will lead to deterioration of the physical and mechanical properties, electrical properties and processing properties of the cable material. ; The product prepared by the second method must add antimony trioxide in order to meet the flame retardant performance requirements of the material. The cable material containing antimony trioxide will release a large amount of harmful gas when burning, causing environmental pollution and human injury. At present, manufacturers such as Huawei and Samsung have banned the use of materials containing antimony trioxide

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