▎ 摘　　要

NOVELTY - High-strength cold-resistant aramid fiber synchronous belt comprises timing belt frame, and a timing belt film is wrapped and pasted outside the timing belt frame, where the timing belt film comprises 10-15 parts mass aramid staple fiber, 2-4 parts mass phosphorus pentoxide, 1-3 parts mass polyphosphoric acid, 6-8 parts mass 2-acrylamido-2-methylpropanesulfonic acid, 60-70 parts mass methyl vinyl phenyl silicone rubber, 2-5 parts mass initiator, 3-5 parts mass coupling agent, 3-5 parts mass nanoboron fibers, 10-20 parts mass inorganic filler, 2-5 parts mass N-(4-cyano-3-trifluoromethylphenyl)methacrylamide, 10-20 parts mass polyether polyamide elastomer parts, and 1-3 parts mass antioxidant. USE - The high-strength cold-resistant aramid fiber synchronous belt is used in textile, machine tool, tobacco, communication cable, light industry, chemical industry, metallurgy, meter instrument, food, mine and automobile. ADVANTAGE - The high-strength cold-resistant aramid fiber synchronous belt has excellent flame retardance, performance stability, heat resistance and aging resistance, and long service life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the high-strength cold-resistant aramid fiber synchronous belt comprising (a) placing methyl vinyl phenyl silicone rubber and polyether polyamide elastomer into an open mill for kneading, alternately adding aramid staple fibers, nanoboron fibers, coupling agents and inorganic fillers, and adding phosphorus pentoxide, polyphosphoric acid, 2-acrylamido-2-methylpropanesulfonic acid, initiator after wrapping rolls , N-(4-cyano-3-trifluoromethylphenyl)methacrylamide and anti-aging agent to obtain a timing belt film after mixing, (b) after mixing the aramid fiber and glass fiber, the skeleton yarn is obtained by spinning through the processes of blowing, carding, pre-combining, sliver coiling, combing, head merging, second merging and tertiary merging in sequence, applying a layer of release agent evenly on the mold, placing the corresponding cloth cover on the mold, hoist it on the forming machine, and wrapping it under the winding stress of 32N to obtain the synchronous belt skeleton, and(c) wrapping the synchronous belt film on the skeleton of the synchronous belt, and vulcanizing on a flat vulcanizing machine, and cooling to room temperature to obtain a high-strength and cold-resistant aramid fiber synchronous belt.