초록

Fibrous webs of bicomponent fibers are made by extruding a layered molten mass through a row of side-by-side orifices into a high-velocity gaseous stream. Bicomponent fibers of small size can be obtained, and the webs offer unique properties.

대표청구항 ▼

[ What is claimed is:] [1.] A fibrous web comprising a coherent entangled mass of melt-blown fibers which individually comprise a first polymeric material extending longitudinally along the fiber through a first portion of the cross-sectional area of the fiber and a second polymeric material adhered

[ What is claimed is:] [1.] A fibrous web comprising a coherent entangled mass of melt-blown fibers which individually comprise a first polymeric material extending longitudinally along the fiber through a first portion of the cross-sectional area of the fiber and a second polymeric material adhered to the first polymeric material and extending longitudinally along the fiber through a second portion of the cross-sectional area of the fiber, said fibers being prepared by extruding a layered molten mass of said first and second polymeric materials through a row of side-by-side orifices into a high-velocity gaseous stream, where the extruded streams are attenuated and drawn into a mass of entangled fibers having an essentially infinite aspect ratio, and the fibers are then collected as a web that coheres through the entangled nature of the fibers.