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    PROCESS TO PREPARE SEQUENTIALLY STRETCHED BIAXIALLY ORIENTED FILM
    1.
    发明申请
    PROCESS TO PREPARE SEQUENTIALLY STRETCHED BIAXIALLY ORIENTED FILM 审中-公开

    公开(公告)号：US20190118455A1

    公开(公告)日：2019-04-25

    申请号：US16090647

    申请日：2017-04-03

    Applicant: DSM IP Assets B.V.

    Inventor： Roman STEPANYAN ,  Hao CHEN

    IPC: B29C55/12 ,  C08J5/18

    Abstract: The invention relates to a process for preparing a sequentially stretched biaxially oriented film, comprising the following steps: a) Melting a composition comprising at least 50 wt % with respect to the total amount of the composition of a copolyamide comprising: i. At least 75 wt % monomeric units derived from caprolactam, and further monomeric units derived from diamines X and/or diacids Y and/or aminoacids Z in a summed amount of between 0.2 to 25 wt %; or ii. At least 75 wt % monomeric units derived from hexamethylene diamine and adipic acid, and further monomeric units derived from diamines X and/or diacids Y and/or aminoacids Z in a summed amount of between 0.2 to 25 wt %; into a polymer melt; b) Casting the polymer melt through a planar die to form a film of at least one layer and subsequently quenching the film to a temperature of below Tg of the copolyamide, while the film is transported in a direction, referred to as machine direction; c) Stretching the film obtained after quenching in a direction parallel to the machine direction (MD-stretching) with a draw ratio DRMD at a temperature of at least Tg of the copolyamide; d) Stretching the film obtained after MD stretching in a direction transversal to the machine direction (TD-stretching) with a draw ratio DRTD at a temperature of at least Tg+10° C. of the copolyamide; e) Heat setting the film obtained after cooling and stretching, at a temperature of between Tm−70° C. and Tm of the copolyamide; in which Tg and Tm of the copolyamide are determined as described by ASTM D3418-03, with a heating and cooling rate of 10° C. per minute, in which DRMD/DRTD is at least 0.8 and DRMD×DRTD is at least 10. The invention also relates to sequentially stretched biaxially oriented film.

    HIGH STRENGTH POLYAMIDE YARN
    3.
    发明申请
    HIGH STRENGTH POLYAMIDE YARN 审中-公开

    公开(公告)号：US20180038019A1

    公开(公告)日：2018-02-08

    申请号：US15551633

    申请日：2016-02-23

    Applicant: DSM IP ASSETS B.V.

    Inventor： Martinus Joseph Maria KEULERS ,  Roman STEPANYAN ,  Hao CHEN

    IPC: D02G3/04 ,  D01D5/16 ,  D01F6/80

    CPC classification number: D02G3/04 ,  D01D5/16 ,  D01F6/80 ,  D02G3/446 ,  D10B2331/02 ,  D10B2505/022 ,  D10B2505/124

    Abstract: The invention relates to a yarn comprising a copolyamide in an amount of at least 90 wt % with respect to the total weight of the yarn, which copolyamide comprises a) at least 95 wt % by weight with respect to the total weight of copolyamide, monomeric units derived from hexamethylene diamine and adipic acid and b1) cyclic monomeric units derived from a diamine X, and cyclic monomeric units derived from a diacid Y, and/or b2) cyclic monomeric units derived from an amino acid Z, in which the summed amount of monomeric units derived from X, Y and Z is between 0.1 to 4.5 wt % by weight with respect to the total weight of the copolyamide and wherein the yarn has a tensile strength of at least 80 cN/tex as measured according to ASTM D885-04. The invention also relates to a process for preparing the yarn.

    HIGH STRENGTH POLYAMIDE YARN
    4.
    发明申请
    HIGH STRENGTH POLYAMIDE YARN 审中-公开

    公开(公告)号：US20180030621A1

    公开(公告)日：2018-02-01

    申请号：US15552085

    申请日：2016-02-23

    Applicant: DSM IP ASSETS B.V.

    Inventor： Martinus Joseph Maria KEULERS ,  Roman STEPANYAN ,  Hao CHEN

    IPC: D01F6/80 ,  B60R21/235 ,  D02G3/44

    CPC classification number: D01F6/80 ,  B60R21/16 ,  B60R21/235 ,  D02G3/446 ,  D10B2331/02 ,  D10B2505/022 ,  D10B2505/124

    Abstract: The invention relates to a Yarn comprising a copolyamide in an amount of at least 90 wt % with respect to the total weight of the yarn, which copolyamide comprises a) at least 95 wt % with respect to the total weight of copolyamide, monomeric units derived from epsilon-caprolactam and b1) cyclic monomeric units derived from a diamine X, and cyclic monomeric units derived from a diacid Y, and/or b2) cyclic monomeric units derived from an amino acid Z, in which the summed amount of monomeric units derived from X,Y and Z is between 0.1 to 4.5 wt % with respect to the total weight of the copolyamide and wherein the yarn has a tensile strength of at least 80 cN/tex as measured according to ASTM D885-04. The invention also relates to a process for preparing the yarn.

    PROCESS TO PREPARE BIAXIALLY ORIENTED FILM
    5.
    发明申请
    PROCESS TO PREPARE BIAXIALLY ORIENTED FILM 审中-公开

    公开(公告)号：US20170327653A1

    公开(公告)日：2017-11-16

    申请号：US15525639

    申请日：2015-11-12

    Applicant: DSM IP ASSETS B.V.

    Inventor： Hao CHEN ,  Alexander Antonius Marie STROEKS ,  Roman STEPANYAN

    IPC: C08J5/18 ,  B29C47/00

    CPC classification number: C08J5/18 ,  B29C48/146 ,  C08J2377/02 ,  C08J2477/06

    Abstract: The invention relates to a process for preparing a biaxially oriented film, comprising the following steps: a) Melting a composition comprising at least 50 wt % with respect to the total amount of the composition of a copolyamide comprising: i. At least 75 wt % monomeric units derived from caprolactam, and further monomeric units derived from diamines X and/or diacids Y and/or aminoacids Z in a summed amount of between 0.2 to 25 wt %; or ii. At least 75 wt % monomeric units derived from hexamethylene diamine and adipic acid, and further monomeric units derived from diamines X and/or diacids Y and/or aminoacids Z in a summed amount of between 0.2 to 25 wt %; into a polymer melt; b) Casting the polymer melt through a planar die to form a film of at least one layer and subsequently quenching the film to a temperature of below Tg of the copolyamide; c) Stretching the film obtained after quenching in a direction parallel to the machine (MD-stretching) with a factor of at least 2 at a temperature of at least Tg of the copolyamide; d) Stretching the film obtained after MD stretching in a direction transversal to the machine (TD-stretching) with a factor of at least 2 at a temperature of at least Tg+10° C. of the copolyamide; e) Cooling the obtained film after TD-stretching; f) Heat setting the film obtained after cooling, at a temperature of between Tm−70° C. and Tm of the copolyamide; in which Tg and Tm of the copolyamide are determined as described by ASTM D3418-03. The invention also relates to a biaxially oriented film and food packaging obtainable by this process.

    HIGH STRENGTH POLYAMIDE YARN
    6.
    发明申请
    HIGH STRENGTH POLYAMIDE YARN 审中-公开

    公开(公告)号：US20190301057A1

    公开(公告)日：2019-10-03

    申请号：US16446489

    申请日：2019-06-19

    Applicant: DSM IP ASSETS B.V.

    Inventor： Martinus Joseph Maria KEULERS ,  Roman STEPANYAN ,  Hao CHEN

    IPC: D02G3/04 ,  D01D5/16 ,  D01F6/80 ,  D02G3/44

    Abstract: Yarns are formed of a copolyamide in an amount of at least 90 wt % with respect to the total weight of the yarn, wherein copolyamide includes (a) at least 95 wt % by weight with respect to the total weight of copolyamide, monomeric units derived from hexamethylene diamine and adipic acid and (b1) cyclic monomeric units derived from a diamine X, and cyclic monomeric units derived from a diacid Y, and/or b2) cyclic monomeric units derived from an amino acid Z. The summed amount of monomeric units derived from X, Y and Z is between 0.1 to 4.5 wt % by weight with respect to the total weight of the copolyamide. The yarns have a tensile strength of at least 80 cN/tex as measured according to ASTM D885-04.

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