AGY’s 947 direct sizing system for E-Glass yarns addresses yarns used primarily in aerospace applications. Fibers with 947 sizing can be woven into fabric and used in composite applications without additional finishing. Yarns produced with the sizing have significantly higher tensile strengths than their counterparts coated with traditional oil and starch sizes, the company claims. Because fabrics made from 947-coated yarns need not undergo heat treatments or cleaning processes that can erode fabric integrity, they can contribute considerably more strength to the composite materials into which they are incorporated. Unidirectional, standard, general-purpose epoxy laminates manufactured with this fiber have an ASTM 3039 tensile strength of 200 ksi, a 40% improvement over traditional E-Glass yarns, and an ASTM D3410 compressive strength of 125 ksi, a 45% improvement over traditional E-Glass yarns. The company says that the sizing system will provide opportunities to remove weight from traditional composite products. It is compatible not only with epoxy and phenolic resins but also with thermoplastics, and it has the potential to be used in the development of hybrid glass and carbon-fiber fabrics.