Aramids films unidirectional

Aramid films have been in development since the late 1990s by several Japanese companies including Toray, Teijin, and Asahi. As with fibers, aramid solutions can be extruded through flat dies to form films. The conventional wet process can be employed to produce unidirectional and bi-oriented films from isotropic aramid solutions. Production of films from anisotropic solutions requires unique processes as shown by the example of PPTA film. 

Spectra Gold Flex is a unidirectional laminate made of four layers of aramid polyamide fibre strips, cross phed and sandwiched in a thermoplastic film. The composite produces ultra-thin vests that are very light and comfortable. They are about 25% lighter than Kevlar or Zylon vests but offer high trauma protection. The tight structure of this composite protects from cuts and slashes and to a degree from stabs. This material also offers flame and heat protection and is able to withstand temperatures of up to 5(X) C. ... 

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