Low-smoke halogen-free flame-retardant polypropylene cable material and preparation method thereof

Abstract

The invention provides a low-smoke halogen-free flame-retardant polypropylene cable material and a preparation method thereof. The low-smoke halogen-free flame-retardant polypropylene cable material is prepared from the following raw materials in parts by mass: 20-40 parts of polypropylene resin, 30-60 parts of polyolefin thermoplastic elastomer, 30-60 parts of a P-N intumescent flame retardant, 2-8 parts of a high molecular weight compatibilizer, 0.01-0.8 part of an initiator, 0.01-8 parts of a cross-linking agent, 0.01-2.5 parts of an antioxidant, 1-5 parts of processing aid and 0.01-3 parts of a nucleating agent. The preparation method comprises the steps of proportionally mixing the polypropylene resin, the P-N intumescent flame-retardant, the cross-linking agent, the antioxidant and the nucleating agent to obtain a pre-mixture; proportionally mixing the pre-mixture, the polyolefin thermoplastic elastomer, the high molecular weight compatibilizer, the initiator and the processing aid to obtain the cable material. The finished product produced from the cable material has the tensile strength of greater than 8MPa; the elongation at break and 5% of secant modulus of the finished product satisfy ASTM D638, and the 150 DEG C thermal deformation rate of the finished product satisfies UL1581; in addition, the flame retardance of the finished product passes through the VW-1 test.

Description

technical field [0001] The invention belongs to the field of cable materials, and in particular relates to a low-smoke halogen-free flame-retardant polypropylene cable material and a preparation method thereof. The thermal deformation rate of the cable at 150°C is less than 50% (UL1581). Background technique [0002] The popularization of personal electronic products has brought new "vitality" to the development of the wire and cable industry - a large number of flexible insulating materials are used in the data lines or connecting lines between mobile terminals and PCs. Although such materials currently on the market have good mechanical and mechanical properties and flexibility, most of these materials will have a significant decrease in elongation at break and electrical properties after high-temperature heat aging, which brings users a lot of problems. Many inconveniences and unsafe factors. [0003] Usually, the above-mentioned flexible insulating material is processed...

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Problems solved by technology

[0004] The invention solves the problems of poor insulation performance, high smoke density and high price of TPU in the prior art, and aims to provide a low-smoke, halogen-free, flame-retardant polypropylene cable material, and a product prepared therefrom It has the characteristics of low smoke and halogen free, high flame retardancy, flexibility and insulation

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