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    THERMOPLASTIC ELASTOMER POWDERS FOR ADDITIVE MANUFACTURING AND THE USE THEREOF
    3.
    发明公开
    THERMOPLASTIC ELASTOMER POWDERS FOR ADDITIVE MANUFACTURING AND THE USE THEREOF 审中-公开

    公开(公告)号：EP4180226A1

    公开(公告)日：2023-05-17

    申请号：EP21208082.4

    申请日：2021-11-12

    Applicant: Covestro (Netherlands) B.V.

    Inventor： JANSSEN, Mark ,  PEPELS, Mark Petrus Franciscus

    IPC: B33Y70/00 ,  B29C64/153 ,  C08G63/672

    Abstract: The invention is in the field of additive manufacturing.
    According to a first aspect of the invention, there is provided an additive manufacturing process for producing a printed article, comprising the step of sintering a powder composition comprising a thermoplastic elastomer,
    wherein the powder composition has a melting onset temperature T m,onset and a melting peak temperature T m,peak , which are measured according to ISO 11357-1/3 (2009), wherein T m,peak minus T m,onset is 30 °C or less; and wherein a test article printed from the powder composition has a rebound resilience of 50 % or more, measured according to DIN 53512.
    According to a second aspect of the invention, there is provided a method of manufacturing a powder composition suitable for additive manufacturing sintering processes comprising the steps of:
    (a) providing a starting material comprising a thermoplastic elastomer;
    (b) heating the starting material of step (a) or the size-reduced material of step (c) to a temperature sufficient to increase the melting onset temperature of the material, thereby obtaining an annealed material; and
    (c) reducing the size of the starting material of step (a) or the annealed material of step (b) into a powder having a D50 particle size value of 20-150 µm, thereby obtaining a size-reduced material,
    wherein size reduction step (c) is performed before or after heating step (b).

    A METHOD FOR MANUFACTURING A CARPET PRODUCT, AND A PRODUCT OBTAINABLE USING THIS METHOD
    10.
    发明公开
    A METHOD FOR MANUFACTURING A CARPET PRODUCT, AND A PRODUCT OBTAINABLE USING THIS METHOD 审中-公开

    公开(公告)号：EP4234806A1

    公开(公告)日：2023-08-30

    申请号：EP22159279.3

    申请日：2022-02-28

    Applicant: Covestro (Netherlands) B.V.

    Inventor： The designation of the inventor has not yet been filed

    IPC: D06N7/00

    Abstract: The invention pertains to a method for manufacturing carpet product comprising providing a first sheet having a front surface and a back surface, providing one or more polyester yarns having a weight of at least 2500 Dtex and a twist level of at least 100 tpm, forming a pile on the front surface of first sheet by stitching the one or more yarns through the first sheet, the one or more yarns having a free end that forms the said pile and a locked end present at the back surface of the first sheet, thereby forming an intermediate product, processing the intermediate product by feeding this product along a body having a heated surface, the back surface being contacted with the said heated surface, to melt at least a part of the polyester of the locked end of the one or more yarns, and then cooling the molten part of the polyester to solidify this molten part of the polyester, thereby connecting the locked end of the one or more yarns to the first sheet and forming the carpet product. The invention also pertains to a carpet product that is obtainable with a manufacturing method according to the invention.

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