Nonwoven medical fabric
AssigneeA. Ahlstrom Corporation
InventorsRahul Dharmadhikary, Rongguo Zhao
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Abstract
A method of manufacturing a nonwoven fabric including at least one nonwoven web material layer having thermoplastic polymer filaments and an initial thickness Ts, wherein the method includes embossing the nonwoven web material layer to form in the layer an embossed portion having a compressed thickness Tc that is less than Ts and an expanded portion of the layer having a thickness Te that is greater than Ts.
Claims31
A nonwoven medical drape fabric comprising a nonwoven web material layer having thermoplastic polymer fibers or filaments, wherein the nonwoven web material layer has an embossed pattern including compressed portions with a compressed thickness Tc and expanded portions, each expanded portion having an expanded thickness Te, wherein the expanded portions have an increased void volume compared to the original nonwoven web material layer of thickness Ts prior to embossing, wherein the nonwoven material layer is formed by:
- embossing the original nonwoven web material layer by passing the original nonwoven web material layer between a rotating patterned steel roll with engraved depressed areas and a counter rotating resilient roll, and wherein the nonwoven medical drape fabric is a fenestration material adjacent a fenestration defined in a medical drape.
A nonwoven medical drape fabric comprising:
- a nonwoven web material layer having spunbonded thermoplastic polymer filaments, wherein the nonwoven web material layer has an embossed pattern including compressed portions having a compressed thickness Tc and expanded portions having an expanded thickness Te, wherein the expanded portions have an increased void volume compared to the original nonwoven web material layer of thickness Ts, wherein the nonwoven medical drape fabric is a fenestration material adjacent a fenestration defined in a medical drape and the nonwoven web material layer is formed by:
- passing the original nonwoven web material layer having the thickness Ts between a rotating patterned steel roll with engraved depressed areas and a counter rotating resilient roll.
A nonwoven medical drape fabric comprising a nonwoven web material layer having thermoplastic polymer fibers or filaments, wherein the nonwoven web material layer has a pre-embossing thickness of Ts and a post-embossing thicknesses of Tc and Te, wherein the Tc thickness corresponds to one or more regions of the layer compressed by embossing and the Te thickness corresponds to one or more regions of the layer expanded by embossing, and wherein thickness Te is greater than Tc and the thickness Ts is smaller than Te, wherein the nonwoven medical drape is a fenestration material adjacent a fenestration defined in a medical drape.
Dependencies are inferred from the claim text.