▎ 摘　　要

NOVELTY - First impregnation liquid comprises 60-85 wt.% binder, 10-30 wt.% filler, 0.01-1 wt.% synergistic functional auxiliary agent, and balance to 100 wt.% additive. The synergistic functional auxiliary agent comprises graphene and/or carbon nanotubes. USE - First impregnation liquid used for preparing packing (claimed). ADVANTAGE - The first impregnation liquid provides packing with increased heat resistance, corrosion resistance, reduced friction coefficient, and improved quality and service life, thus, saving cost. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) preparation of first impregnation liquid comprising uniformly mixing binder, filler, synergistic functional auxiliary agent and optionally additives, where mixing comprises grinding; and (2) preparation of packing comprising weaving fiber, soaking in the first impregnation liquid for the first time, drying, obtaining primary product, and soaking in second impregnation liquid.