GB/T 47405-2026

This standard specifies test methods for measuring the permeability of carbon fiber reinforcements, which is critical for predicting resin flow behavior during liquid composite molding processes like resin transfer molding (RTM) or vacuum-assisted resin transfer molding (VARTM). It is applied in the manufacturing of high-performance composite parts, particularly in aerospace, automotive, and wind energy industries, where consistent fiber wet-out and void-free laminates are required. The standard ensures quality control and process optimization for engineers selecting reinforcement materials and designing mold filling simulations.