HYDROFORMED EXPANDED SPUN BONDED NONWOVEN WEB AND METHOD FOR MAKING SAME

    公开(公告)号:US20180094370A1

    公开(公告)日:2018-04-05

    申请号:US15833363

    申请日:2017-12-06

    摘要: A method for hydroforming a spun bonded nonwoven web includes applying a plurality of pressurized liquid jets onto an original unexpanded spun bonded nonwoven web having an original loft while the web passes over a forming structure. A plurality of spun bonded fibers in the original unexpanded spun bonded nonwoven web are reoriented from a closely packed substantially horizontal orientation to a more loosely packed orientation with greater vertical spacing between the fibers to produce a hydroformed expanded spun bonded nonwoven web having a loft of at least about 1.3 times greater than the original loft of the original unexpanded spun bonded nonwoven web, and an air permeability of at least about 1.2 times greater than an original air permeability of the original unexpanded spun bonded nonwoven web. The hydroformed expanded spun bonded nonwoven web has a surface with a plurality of protuberances in a pattern corresponding to the pattern of apertures in the forming structure.

    METHOD OF MAKING A HYDROFORMED COMPOSITE MATERIAL

    公开(公告)号:US20180044826A1

    公开(公告)日:2018-02-15

    申请号:US15797305

    申请日:2017-10-30

    IPC分类号: D04H1/492 D04H3/011

    摘要: A method for hydroforming a composite precursor material includes forming a composite precursor material comprising an original spun bonded nonwoven web and a polymer film layer. The method also includes applying a plurality of pressurized liquid jets onto an outer surface of the original spun bonded nonwoven web while the composite precursor material passes over a forming structure to push and reorient a plurality of spun bonded fibers from a closely packed substantially horizontal orientation to a more loosely packed orientation with greater vertical spacing between the fibers to produce a hydroformed composite material comprising an expanded spun bonded nonwoven layer having a loft of at least about 1.3 times greater than the original loft of the original spun bonded nonwoven web, and an air permeability of at least about 1.2 times greater than an original air permeability of the original unexpanded spun bonded nonwoven web.