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    ANTIBACTERIAL POLYURETHANE SPONGE AND PREPARATION METHOD THEREFOR
    1.
    发明申请
    ANTIBACTERIAL POLYURETHANE SPONGE AND PREPARATION METHOD THEREFOR 有权

    公开(公告)号：US20250058013A1

    公开(公告)日：2025-02-20

    申请号：US18725184

    申请日：2022-06-09

    Applicant: ROOSIN MEDICAL CO., LTD.

    Inventor： DAYONG CHEN ,  JIAMIAN CHU ,  XINGWU CHU

    IPC: A61L15/26 ,  A61L15/28 ,  A61L15/42 ,  A61L15/44

    Abstract: The present invention relates to the technical field of medical dressings, in particular to an antibacterial polyurethane sponge and a preparation method therefor. An antibacterial dressing, which is obtained by means of adding an antibacterial effective component to a molded polyurethane sponge dressing in a soaking or spraying mode, has a poor antibacterial durability. According to the present invention, on the basis of the problem, a water dispersion system of an antibacterial agent is pre-dispersed in a polyurethane prepolymer and then foamed, which enables the antibacterial agent to be encapsulated in the porous structure of a polyurethane sponge and achieves the effect of slowly releasing antibacterial metal ions, so that the prepared antibacterial polyurethane sponge has a good antibacterial durability.

    Process and apparatus for making channeled absorbent articles
    7.
    发明授权
    Process and apparatus for making channeled absorbent articles 有权

    公开(公告)号：US12127922B2

    公开(公告)日：2024-10-29

    申请号：US17440828

    申请日：2020-03-20

    Applicant: ONTEX BV ,  ONTEX GROUP NV

    Inventor： Thomas Heege ,  Ainas Weber ,  Christel Mailinger ,  Manfred Breu ,  Detlef Vollrath ,  Alissa Idelson ,  Christoph Wagner

    IPC: A61F13/475 ,  A61F13/15 ,  A61F13/42 ,  A61F13/533 ,  A61F13/536 ,  A61L15/28 ,  A61L15/42 ,  A61L15/60 ,  D04H1/4291 ,  D04H1/54 ,  D04H3/007 ,  D04H3/14 ,  A61F13/531

    CPC classification number: A61F13/4756 ,  A61F13/15634 ,  A61F13/15658 ,  A61F13/15707 ,  A61F13/42 ,  A61F13/533 ,  A61F13/536 ,  A61L15/28 ,  A61L15/425 ,  A61L15/60 ,  D04H1/4291 ,  D04H1/54 ,  D04H3/007 ,  D04H3/14 ,  A61F2013/15821 ,  A61F2013/5312

    Abstract: A method for making an absorbent article comprising an absorbent core comprising one or more channels, the method comprising the steps of: i. providing a first endless moving surface comprising a plurality of molds, each mold comprising a non-porous insert therein, typically said insert having the inverse shape of said channel(s), wherein the molds are in fluid communication with an under-pressure source except for said insert; ii. feeding a first nonwoven web to said first endless moving surface and over one or more said molds; iii. depositing an absorbent material, comprising cellulose fibers and/or superabsorbent polymer particles, over at least a portion of said nonwoven web; iv. removing said absorbent material from areas of the nonwoven web corresponding to said insert; v. applying a second nonwoven web directly or indirectly over the absorbent material, or folding said first nonwoven web, such to sandwich said absorbent material between upper and lower layers of said nonwoven web(s); vi. joining said upper and lower layers together at least in the areas of the nonwoven web(s) corresponding to the insert to form an absorbent core having one or more channels substantially free of absorbent material; vii. optionally joining an acquisition distribution layer to said absorbent core, typically a skin facing surface of said upper layer; viii. optionally laminating said absorbent core and acquisition distribution layer between a liquid pervious topsheet and a liquid impervious backsheet; wherein step vi. comprises the step of selectively applying a first pressure onto the absorbent core, preferably only, in a central portion thereof and a second pressure, preferably only, along peripheral longitudinal side edges thereof miming opposite and parallel to each other and being outboard of said central portion, said central portion corresponding at least to a region of the core comprising said channel(s), and wherein said first and second pressures are successively applied along a machine direction (MD).

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