US glass fiber manufacturer AGY has introduced a new direct sizing system for E-glass yarns. The sizing will initially be available on AGY“s DE75 yarn, which is used primarily in aerospace fabrics.
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US glass fiber manufacturer AGY has introduced a new direct sizing system for E-glass yarns. The sizing will initially be available on AGY“s DE75 yarn, which is used primarily in aerospace fabrics. AGY developed the new sizing system, called 947, for yarns used primarily in aerospace applications, thanks to its experience with its S-2 Glass direct-sized products. Fibers with 947 sizing can be woven into fabric and used in composite applications without additional finishing. According to the company, yarns produced with the new 947 sizing have significantly higher tensile strengths than their counterparts coated with traditional oil and starch sizes. Moreover, because fabrics made from 947-coated yarns do not need to undergo damaging heat treatments or other cleaning processes that can erode fabric integrity, they can provide considerably more strength to the composite materials into which they are incorporated. AGY also claims that unidirectional standard general purpose epoxy laminates manufactured with this fiber have an ASTM 3039 tensile strength of 200 ksi (1379 MPa), a 40% improvement over traditional E-glass yarns; and an ASTM D3410 compressive strength of 125 ksi (862 MPa), a 45% improvement over traditional E-glass yarns. This new sizing system will provide our aerospace customers with new opportunities to remove weight from traditional composite products, says Drew Walker, AGY vice president of Sales and Marketing. 947 has been developed for a wide range of applications. It is compatible not only with epoxy and phenolic resins but also with thermoplastics. It even has the potential to be used in the development of hybrid glass and carbon fiber fabrics.