In this study, longitudinally oriented electrospun core–sheath nanoyarns (csNYs), consisting of a polylactic acid microfiber core and an electrospun nanofiber sheath, were fabricated for potential PN ...

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Although the operating rate of spandex plants remained medium, the demand side still could not catch up with the growth rate of the supply side. Sellers still faced pressure to sell, and the price ...