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    HIGH PERFORMANCE FIBERS COMPOSITE SHEET
    1.
    发明申请
    HIGH PERFORMANCE FIBERS COMPOSITE SHEET 有权

    公开(公告)号：US20210114340A1

    公开(公告)日：2021-04-22

    申请号：US16956094

    申请日：2018-12-17

    申请人： DSM IP ASSETS B.V.

    发明人： Johann VAN ELBURG ,  Harm VAN DER WERFF ,  Roelof MARISSEN ,  Ulrich HEISSERER ,  Raul Marcelino PEREZ GRATEROL

    IPC分类号： B32B5/26 ,  C08F210/02 ,  F41H5/04 ,  B32B5/12

    摘要： The invention relates to a composite sheet comprising at least two adjacent fibrous monolayers of unidirectionally aligned high tenacity polyethylene fibers, whereby the direction of orientation between the polyethylene fibers of said two fibrous layers differs by at least 80° and up to 90°, the fibers having a tenacity of at least 1.5 N/tex, said fibers being in a matrix comprising a homopolymer or copolymer of ethylene and wherein said homopolymer or copolymer of ethylene has a density as measured according to IS01183 of between 870 to 980 kg/m3, said composite sheet having an areal density of between 50 and 500 g/m2 wherein the composite sheet has an areal density normalized in-plane shear force measured at 25° C. evaluated according to the bias extension test method of at least 0.40 N·m2·g-1 at 10 mm clamp displacement.

    BALLISTIC-RESISTANT CURVED MOLDED ARTICLE
    3.
    发明申请
    BALLISTIC-RESISTANT CURVED MOLDED ARTICLE 有权

    公开(公告)号：US20210088313A1

    公开(公告)日：2021-03-25

    申请号：US16954804

    申请日：2018-12-12

    申请人： DSM IP Assets B.V.

    发明人： Johann VAN ELBURG ,  Matthew CRAIG ,  James ROGERS

    IPC分类号： F41H5/04 ,  B32B37/12

    摘要： The present invention provides a process for producing a ballistic-resistant curved molded article said process comprising pressing in a mold a stack comprising a plurality of layers of unidirectionally aligned polyolefin fibers substantially absent a bonding matrix and a plurality of layers of adhesive; characterized in that a means for dispersing pressure is employed against at least one surface of the stack. Also provided are a ballistic-resistant curved molded article and a press-pad having substantially the shape of a curved mold.

    BALLISTIC-RESISTANT HELMET SHELL
    4.
    发明公开
    BALLISTIC-RESISTANT HELMET SHELL 审中-公开

    公开(公告)号：US20230191666A1

    公开(公告)日：2023-06-22

    申请号：US16956087

    申请日：2018-12-14

    申请人： DSM IP ASSETS B.V.

    发明人： Johann VAN ELBURG ,  Harm VAN DER WERFF ,  Roelof MARISSEN ,  Ulrich HEISSERER ,  Raul Marcelino PEREZ GRATEROL

    IPC分类号： B29C43/00 ,  B29C43/52 ,  B29C43/20

    CPC分类号： B29C43/003 ,  B29C43/52 ,  B29C43/203 ,  B29L2031/4821

    摘要： The invention relates to a process for producing a ballistic-resistant curved molded article said process comprising forming a stack of a plurality of composite sheets, pressing the stack comprising the composite sheets at a temperature of between 80° C. to 150° C. and a pressure of between 10 and 400 bar for at least 5 minutes to obtain a curved molded article, cooling the compacted stack to a temperature below 80° C. while maintaining the pressure above 10 bar, releasing the pressure from the cooled curved molded article; wherein the composite sheets comprise unidirectionally aligned high tenacity polyethylene fibers and a matrix comprising a polyethylene resin being a homopolymer or copolymer of ethylene having a density of between 870 to 980 kg/m3 when measured according to ISO1183 and a melt flow index of between 0.5 and 50 g/10 min when measured according to ASTM 1238B-13 at a temperature of 190° C. and a weight of 21.6 kg.

    HIGH PERFORMANCE FIBERS COMPOSITE SHEET
    5.
    发明申请
    HIGH PERFORMANCE FIBERS COMPOSITE SHEET 有权

    公开(公告)号：US20220339905A1

    公开(公告)日：2022-10-27

    申请号：US17855777

    申请日：2022-06-30

    申请人： DSM IP ASSETS B.V.

    发明人： Johann VAN ELBURG ,  Harm VAN DER WERFF ,  Roelof MARISSEN ,  Ulrich HEISSERER ,  Raul Marcelino PEREZ GRATEROL

    IPC分类号： B32B5/26 ,  B32B5/12 ,  C08F210/02 ,  F41H5/04 ,  B32B27/12 ,  B32B27/32

    摘要： Composite sheets include at least two adjacent fibrous monolayers of unidirectionally aligned high tenacity polyethylene fibers, whereby the direction of orientation between the polyethylene fibers of said two fibrous layers differs by at least 80° and up to 90°, the fibers having a tenacity of at least 1.5 N/tex, the fibers being in a matrix comprising a homopolymer or copolymer of ethylene and wherein the homopolymer or copolymer of ethylene has a density as measured according to ISO1183 of between 870 to 980 kg/m3. The composite sheets have an areal density of between 50 and 500 g/m2, wherein the composite sheets have an areal density normalized in-plane shear force measured at 25° C. evaluated according to a bias extension test method variant of ASTM D3518 of at least 0.40 N·m2·g−1 and lower than 5.0 N·m2·g−1 at 10 mm clamp displacement and an areal density normalized in-plane shear force measured at 110° C. and clamp displacement of 10 mm of at least 0.01 N·m2·g−1 and lower than 0.20 N·m2·g−1.

    BALLISTIC-RESISTANT MOLDED ARTICLE
    7.
    发明申请
    BALLISTIC-RESISTANT MOLDED ARTICLE 有权

    公开(公告)号：US20210088312A1

    公开(公告)日：2021-03-25

    申请号：US16954682

    申请日：2018-12-12

    申请人： DSM IP ASSETS B.V.

    发明人： Johann VAN ELBURG ,  Matthew CRAIG ,  James ROGERS

    IPC分类号： F41H5/04 ,  B32B5/26

    摘要： The present invention provides process for producing a ballistic-resistant molded article, which molded article comprises: i) a plurality of layers of unidirectionally aligned polyolefin fibers, which layers are substantially absent a bonding matrix; and ii) a plurality of layers of adhesive, and which process comprises: a) providing a plurality of precursor sheets, each of said precursor sheets comprising i) at least one layer of unidirectionally aligned polyolefin fibers which layer is substantially absent a bonding matrix, and ii) at least one layer of adhesive; b) stacking said precursor sheets to form a stack, wherein the total amount of adhesive in the stack is from 5.0 to 12.0 wt. % based on the total weight of the stack; c) pressing the stack produced in step b) at a temperature of from 1 to 30° C. below the melting point of the polyolefin fibers and at a pressure of at least 8 MPa; and d) cooling the pressed stack produced in step c) to at least 50° C. below the melting point of the polyolefin fibers while maintaining pressure.