High-performance para-aramid paper strengthened by ultrafine fiber pulp of polyphenylene sulfide

Owing to its excellent heat resistance, lightness, insulation, and mechanical properties, aramid paper has been widely used in aerospace, rail transit, military, and other high-tech areas. With the rapid development of modern industries, para-aramid paper-based materials have become the development direction and trend of the specialty paper industry. In this study, para-aramid chopped fibers/polyphenylene sulfide (ACFs/PPS) composite paper sheets were fabricated by modern wet papermaking. The tensile strength, tensile index, and tear index of the hotpressed ACFs/PPS composite paper sheets were substantially improved, reaching 103.5 MPa, 80.9 N m/g, and 119.1 mN m2/g under optimal speed of hot-pressing roller (0.2 m/min), hot-pressing temperature (310 degrees C), hotpressing pressure (0.2 MPa), and ACFs content (70 wt%). The mechanical properties of hot-pressed ACF/PPS composite paper were markedly superior. Besides, the dielectric constant of the composite paper remained stable even when the temperature reached 100 degrees C. Briefly stated, ACFs/PPS composite paper exhibits desirable mechanical performance, thermostability, high breakdown strength, and low dielectric constant, delivering great potentials in the high-tech areas.

Automated summary

This study fabricated ACFs/PPS composite paper sheets using modern wet papermaking techniques, which significantly improved mechanical properties and thermal stability, showing promising potential in high-tech areas.