公开(公告)号：US20210362082A1

公开(公告)日：2021-11-25

申请号：US17322924

申请日：2021-05-18

Applicant: Carl Freudenberg KG

Inventor： Achraf Khedimi ,  Birgit Goedicke ,  Jean-Francois Kerhault

IPC: B01D39/16 ,  B32B5/02 ,  B32B5/26 ,  D04H1/4382 ,  D04H1/492 ,  D04H1/724 ,  A62B23/02

Abstract: A face mask for protection against infectious agents includes: a filter medium from spun nonwoven, which has multicomponent filaments, which are split at least partially into elementary filaments. In an embodiment, the filter medium includes at least two layers of spun nonwoven. In an embodiment, each layer of spun nonwoven has a basis weight of 10 to 100 g/m2.

公开(公告)号：US20180245252A1

公开(公告)日：2018-08-30

申请号：US15747444

申请日：2016-07-15

Applicant: Carl Freudenberg KG

Inventor： Robert Groten ,  Benedicte Beck ,  Ulrich Jahn ,  Abdelkader Ameur ,  Jean-Francois Kerhault

IPC: D04H3/11 ,  D04H3/016 ,  D04H3/011

CPC classification number: D04H3/11 ,  D04H1/495 ,  D04H3/011 ,  D04H3/016 ,  D04H3/018 ,  D10B2331/02 ,  D10B2331/04 ,  D10B2403/01 ,  D10B2503/06 ,  D10B2505/08

Abstract: In an embodiment, the present invention provides a method for producing a structured microfilament non-woven, including: forming a non-woven by spinning microfilaments and/or composite filaments that can be split into microfilaments to form at least one fiber layer, stretching the at least one fiber layer, and laying the at least one fiber layer; thermally pre-bonding the non-woven; treating the thermally pre-bonded non-woven using a pressurized medium in order to break the thermal pre-bonding at least in part; and further applying a pressurized medium to the non-woven while the non-woven is resting on a structure-producing surface, so as to obtain a structured microfilament non-woven.