Rigid-tough balanced heat-resistant PA66 material and preparation method thereof

The rigid-tough balanced heat-resistant PA66 material is prepared from the following components in parts by weight: 58.2 to 69 parts of PA66 resin I, 30 to 40 parts of toughening master batch, 0.3 to 0.5 part of lubricant I, 0.2 to 0.3 part of antioxidant I and 0.5 to 1 part of color master batch, wherein the toughening master batch is prepared from the following components in parts by weight: 32.2 parts of PA66 resin II, 15 parts of carbon nanotubes, 50 parts of a toughening agent, 0.5 part of a coupling agent, 0.2 part of an antioxidant II, 0.5 part of a lubricant II and 1.5 parts of PA66 ground powder. According to the invention, the toughening master batch is prepared by modifying the PA66 resin with the carbon nanotubes treated by the coupling agent, and then the toughening master batch is mixed with the PA66 resin and other auxiliaries to prepare the rigid-tough balanced heat-resistant PA66 material, so that the tensile strength of the rigid-tough balanced heat-resistant PA66 material is greater than 60