The invention relates to a flame-retardant polyamide composition and its preparation method. The polyamide composition includes a) aliphatic polyamide resin, b) metal sulfide, c) compatibilizer, d) coupling agent, e) amorphous semi-aromatic polyamide resin and f) flat glass fiber, optionally supplemented with g) halogen-free flame retardant, h) antioxidant and i) processing aid. The preparation steps are as follows: 1) Pre-mix component a) to d) to prepare the first premix; 2) Feed the first premix into a twin-screw extruder to produce wear-resistant additive masterbatch as the second premix; 3) Blend the masterbatch with component e) and optional auxiliaries to form the third premix; 4) Feed the third premix and flat glass fiber into the twin-screw extruder, wherein glass fiber is added through the side feeding port and other raw materials through the main feeding port, to obtain the final polyamide composition.
Area Code: CN
Application Number: CN202411643403.8
