Elastic film/fiber formulations

摘要

The present invention relates to elastic film formulations that have surprisingly high tensile strengths in addition to good viscosity stability and are based on a blend of two styrene block copolymers, namely, styrene-isoprene/butadiene-styrene and styrene- butadiene-styrene. The blend of these two styrenic block copolymers in the range set forth and described herein yield high tensile strength that is at least 50% higher than that of the prior art based styrenic block copolymers and have good viscosity stability. Moreover, the present invention relates to a blend of two different styrene block copolymers that can be made by dry blending the block copolymer components. Then the blend can be extruded into uncross-linked film, fiber, or plurality of fibers.