Aramid Ⅲ paper-based composite materials were prepared from aramid Ⅲ chopped fibers and meta-aramid fibrids using wet mold-ing technology to study the effects of aramid Ⅲ chopped fiber length and percentage on the homogeneity,tensile strength,modulus of elastic-ity,elongation at break,and tearing strength of aramid Ⅲ paper-based composite materials.The results showed that when the aramid Ⅲchopped fiber length was 6 mm and the percentage was 50％,the comprehensive mechanical properties of aramid Ⅲ paper-based composite materials were better,among which the tensile strength was 2.66 kN/m,the elastic modulus was 3 136 MPa,the elongation at break was 1.78％,and the tearing strength was 2 912 mN.The tensile fracture surfaces of paper-based composite materials showed different shapes due to the difference of the length and percentage of the aramid Ⅲ chopped fibers.Compared with the meta-aramid paper,the aramid Ⅲ pa-per-based composite materials had better high-temperature dimensional stability,which was expected to further enhance the application pros-pect of aramid in the field of composite reinforcement.
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