High-oxygen index thermoplastic low-smoke halogen-free polyolefin cable material and preparation method thereof

Abstract

The invention relates to a high-oxygen index thermoplastic low-smoke halogen-free polyolefin cable material and a preparation method thereof. The material is prepared from the following components: 40-60 parts of ethylene-vinyl acetate copolymer (EVA), 10-35 parts of linear low-density polyethylene (LLDPE), 2-25 parts of ethylene-octylene copolymer (POE), 10-30 parts of an interfacial compatibilizer (grafting material and silicone master batches), 100-180 parts of aluminum hydroxide (the aluminum hydroxide of which the particle sizes are smaller than 1 micron accounts for about 0-50% and the aluminum hydroxide of which the particles sizes are 1-10 microns accounts for 50-100%), 0-50 parts of other fire retardants, 0-4 parts of an antioxidant and 1-10 parts of other mill base and the like. Compared with the prior art, the high-oxygen index thermoplastic low-smoke halogen-free polyolefin cable material has the advantages that the aluminum hydroxide materials with different particle size ratios are selected, so that a product has the characteristics of a high oxygen index, high mechanical strength, good processability and the like. The product can be applied to sheaths or insulating materials of a power cable, a control cable, an optical cable, a local cable, a signal cable and various transmission cables, plays a structural flame retardant role and is used for improving the flame resistance of the cable.

Description

technical field [0001] The invention relates to a high oxygen index thermoplastic halogen-free low-smoke polyolefin cable material and a preparation method thereof. Background technique [0002] Thermoplastic halogen-free low-smoke flame-retardant polyolefin cable compound is a highly filled and highly flame-retardant material. It is a flame retardant added to the polyolefin matrix, which releases water molecules or utilizes a layered structure or produces carbon Layers and other functions to achieve the effect of flame retardancy, thereby protecting the internal structure of the cable. This product can be used for the sheath or insulation of power cables, control cables, optical cables, local telephone cables, signal cables and various transmission cables, so that the cables can reach a higher flame retardant level and meet the use requirements. [0003] As the requirements of the use environment become more and more stringent, the flame retardant requirements of cable mat...

AI Technical Summary

Problems solved by technology

In order to improve the oxygen index, the traditional method is to increase the oxygen index by filling a large amount of flame retardants, which leads to the shortcomings of the material such as a sharp drop in mechanical properties, high hardness, poor fluidity, poor processability and slow extrusion speed.

Images