Teijin in May of this year established a polycarbonate production subsidiary in Singapore, Teijin Polycarbonate Singapore. Progress on composites and alloys Recent advances in polycarbonate technology have been diverse. They include increased safety of production, greater resistance to burning, increased durability and improved optical properties. One of the most important areas of progress has been the development of new and improved combinations with other materials. Such combinations make possible some unique combinations of properties.
Major applications are flexible printed circuit boards and other electronics applications.
Until then it had been difficult to alloy polycarbonate and aramid, and films could not be produced from such alloys. Toray overcame this by modifying the aramid molecular structure to facilitate its dissolving in the polycarbonate. The resulting alloy has the form of continuous polycarbonate islands in a sea of aramid. It has a ratio of 70 percent polycarbonate and 30 percent aramid. Mechanical strength is twice that of polycarbonate and half that of aramid, with a rupture strength of 20kg per square millimeter.