Flexible halogen-free flame-retardant polyphenyl ether electric wire cable shield material and preparation method thereof

Abstract

The invention relates to the field of halogen-free flame-retardant electric wire cable shield materials, in particular to a flexible halogen-free flame-retardant polyphenyl ether electric wire cable shield material and a preparation method thereof. The flexible halogen-free flame-retardant polyphenyl ether electric wire cable shield material is characterized by comprising the following raw materials in percentage: 10 to 30 percent of polyphenyl ether resin; 15 to 35 percent of styrene elastomer; 5 to 10 percent of polyolefin; 8 to 15 percent of plasticizing agent; 3 to 8 percent of compatilizer; 15 to 25 percent of main flame retardant; 2 to 8 percent of synergistic flame retardant; 2 to 8 percent of smoke suppressant; 0.5 to 1 percent of lubricant; 0.5 to 1 percent of antioxygen; and 2 to 3 percent of masterbatch. The flexible halogen-free flame-retardant polyphenyl ether electric wire cable shield material has favorable mechanical property, flexibleness, flame retardant property, heat resistance and processability.

Description

Technical field: [0001] The invention relates to the field of a halogen-free flame-retardant wire and cable sheathing material, in particular to a flexible halogen-free flame-retardant polyphenylene ether wire and cable sheathing material and a preparation method thereof. Background technique: [0002] Wires and cables are widely used in the transmission of energy and information. Traditional polyvinyl chloride (PVC) wire and cable sheathing materials are very easy to catch fire due to excessive heat generation of the line during use, causing fires. And, PVC cable material produces a large amount of poisonous gas and smog when burning, seriously endangers people's life and property safety. The hydrogen chloride gas released when the PVC cable material is burned can also cause corrosion of equipment, thereby causing "secondary pollution". Secondly, the processing fluidity and thermal stability of PVC resin itself are poor, so plasticizers and stabilizers need to be added to ...

AI Technical Summary

Problems solved by technology

[0003] Traditional halogen-free flame-retardant cable materials are mainly flame-retardant by adding magnesium hydroxide and aluminum hydroxide to polyolefin materials, but their flame-retardant efficiency is low, and 50-60% needs to be added to achieve a certain flame-retardant effect , which makes the mechanical properties of the composite material deteriorate to a great extent, and the processing flow performance is further reduced

Chinese Patent Publication No.: CN 102140192A In the low-smoke halogen-free polyolefin composite material and its preparation method, in order to reduce the content of inorganic flame retardants and ensure the high flame retardant performance of the composite material, magnesium hydroxide is used as the main flame retardant Adding silicone as a flame retardant synergist, although the tensile strength of the prepared composite material is very high, the elongation at break is very short, only a few tens, while the polyolefin cable material standard clearly states that the elongation at break should be greater than 150%

However, the tensile strength of the cable material prepared by it is too low. In the embodiment, the highest tensile strength is only 9.5MPa, and the rest are 6-7MPa, which obviously cannot meet the requirements of the halogen-free flame-retardant cable material.

And because it uses a liquid phosphate flame retardant, a large amount of flame retardant must be added to achieve the flame retardant effect required by the UL standard, so that the small molecule phosphate liquid flame retardant can easily penetrate from the composition Migrating out, resulting in sticky wire and cable surface, affecting the appearance of the preparation, and also affecting the heat resistance and electrical insulation of the material

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