PROPYLENE BASED MELTBLOWN NONWOVEN LAYERS AND COMPOSITE STRUCTURES

The present invention relates to propylene-based nonwoven layers made by the meltblown process, and laminates incorporating such layers. The meltblown layers of the present invention comprise propylene copolymers characterized by having less than 50 percent crystallinity. The meltblown layers of the...

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Bibliographische Detailangaben
Hauptverfasser: EDWARD N. KNICKERBOCKER, ANDY C. CHANG, ANTONIOS K. DOUFAS, JOSEF J. VAN DUN, RANDY E. PEPPER, THOMAS T. ALLGEUER, HONG PENG, GERT J. CLAASEN
Format: Patent
Sprache:eng ; spa
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Zusammenfassung:The present invention relates to propylene-based nonwoven layers made by the meltblown process, and laminates incorporating such layers. The meltblown layers of the present invention comprise propylene copolymers characterized by having less than 50 percent crystallinity. The meltblown layers of the present invention show an improved combination of extensibility and tensile strength. The laminate structures of the present invention are characterized by a combination of low bending modulus with high peel strength. La presente invencion se refiere a capas no tejidas a base de propileno, hechas mediante el proceso de soplado en fusion, y a estructuras laminadas que incorporan dichas capas. Las capas sopladas en fusion de la presente invencion comprenden copolimeros de propileno caracterizados porque tienen menos de 50 por ciento de cristalinidad. Las capas sopladas en fusion de la presente invencion muestran una combinacion mejorada de extensibilidad y resistencia a la traccion. Las estructuras laminadas de la presente invencion estan caracterizadas por una combinacion de bajo modulo de flexion con elevada resistencia al desprendimiento.