Airport-use instantaneous-high-temperature-resistant man-made grass filament fiber and preparation technology thereof

The invention relates to an airport-use instantaneous-high-temperature-resistant man-made grass filament fiber, which is characterized in that: using a room-temperature ionic liquid solvent and a polyisophthaloyl metaphenylene diamine coating layer in the man-made grass filament fiber; using a man-made grass filament fiber as a raw material, padding in a finishing liquid, solidifying in a solidification liquid, preheating in a preheating liquid, drawing in an aqueous liquid, and then obtaining the airport-use instantaneous-high-temperature-resistant man-made grass filament fiber by a heat treatment process. During the preparation of the instantaneous-high-temperature-resistant man-made grass filament fiber, the polyisophthaloyl metaphenylene diamine coating layer is added on the grass filament surface, and the drafting process in the preparation processes can also increase the orientation degree of the raw grass filament, so that the pulling strength can be increased by a certain extent. The polyisophthaloyl metaphenylene diamine coating layer has a good high-temperature resistant property and an excellent thermal insulating property, so that when the coating layer is subjected to an instantaneous high-temperature action, the coating layer can well protect the internal man-made grass filament fiber, and snow removal requirements of lawns of airports can be satisfied.