TUBE EXTRUDABLE POLYAMIDE COMPOSITION WITH A GOOD FLAMMABILITY AND LONG TERM HEAT STABILITY

摘要

A polyamide resin composition is provided to ensure excellent extrusion tubing moldability and a long-term heat-resistance property at a high temperature by using a non-halogen flame retardant and copper-based heat-resistant agent. A polyamide resin composition comprises a polyamide resin 100.0 parts by weight, a non-halogen flame retardant 3-15 parts by weight and a copper-based heat-resistant agent 0.3-5 parts by weight. In the composition, the maintenance rate of tensile strength after the aging at 175 °C for 500 hr is 70% or greater than the early strength; the maintenance rate of tensile elongation after the aging is 10% or greater than the early value; a non-flammable grade is the UL-94 V-2 or greater.