Production of wetlaid-spunbond laminate membrane support

Details Production of wetlaid-spunbond laminate membrane support Production of wetlaid-spunbond laminate membrane support

2006-03-07

2008-12-30

Menon, Krishnan S (Department: 1797)

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Nonwoven fabric

Including an additional nonwoven fabric

C442S361000, C442S373000, C442S382000, C442S400000, C442S401000, C442S408000, C210S490000, C210S492000, C210S500210, C210S503000, C162S123000, C162S157100, C162S157300

Reexamination Certificate

active

07470639

ABSTRACT:
Nonwoven fabric laminates suitable for use as semipermeable membrane supports are produced by forming a spunbond nonwoven fabric first layer of continuous thermoplastic polymer filaments; forming a wet-laid nonwoven fabric second layer of discrete length thermoplastic polymer fibers; and bonding the first and second layers in opposing face-to-face relationship to form a composite support, where the first and second layers define first and second outer surfaces of the composite support. The resulting semipermeable membrane supports provide an advantageous balance of properties, including smoothness, porosity, interlaminar adhesion, and flux properties.

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