Electric leakage resistant PP material

Abstract

The invention relates to the technical field of novel materials and particularly relates to an electric leakage resistant PP material. The electric leakage resistant PP material is prepared from the following raw material components in percentage by weight: 60-90% of PP resin, 1-5% of a phosphorus phenol flame retardant, 4-8% of a bromine flame retardant, 1-3% of a powder filler, 2-7% of a flexibilizer and 0.2-1% of a lubricating agent. The preparation method comprises the following steps: adopting the principle condensed phase flame retardance and auxiliary interrupted heat exchange, strictlycontrolling the component of metal components in the materials, taking the PP resin as a carrier, performing molecular decomposition and recombination by a twin-screw extruder, granulating, performing physical test and environmental inspection, and finally obtaining the high-PTI (Proof Tracking Index) low-cost PP material. The product is stable in quality and excellent in safety performance, thePTI value reaches 600V, the cost is greatly reduced relative to PBT (Poly Butylenes Terephthalate), the cost performance is high, and the requirements of the electronics and electric appliance industries on the product safety are met.

Description

technical field [0001] The invention relates to the technical field of new materials, especially PP materials. Background technique [0002] In various electronic and electrical products such as computers, automotive connectors, cooling fans, AC / DC plugs, and transformer frames, modified PBT materials are usually used to make shells. PBT (abbreviation for polybutylene terephthalate), was first developed by German scientist P. Schlack in 1942. Afterwards, the American Celanese company (now Ticona) carried out industrial development and listed it under the trade name of Celanex. In 1970, 30% glass fiber reinforced plastics were put on the market. With the wide application of PBT materials, the performance requirements of PBT materials have also increased, such as flame retardancy, and sufficient tensile strength, bending strength, Impact strength, etc., so it is necessary to add auxiliary materials such as flame retardants and glass fibers during production to modify PBT. Wi...

AI Technical Summary

Problems solved by technology

The tracking index (PTI) value of ordinary flame-retardant PBT is low, while the glow wire ignition temperature is generally 650°C-750°C. The material is used in electronic and electrical products, which often brings safety hazards; and the modified PBT The cost of material production is high, which affects the market competitiveness of the products produced