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    Multi-layered fiber
    2.
    发明授权
    Multi-layered fiber 有权
    多层纤维

    公开(公告)号：US07960024B2

    公开(公告)日：2011-06-14

    申请号：US12360596

    申请日：2009-01-27

    Applicant: Sujith Nair ,  Sasha Stankovich ,  Yunzhang Wang ,  Venkatkrishna Raghavendran

    Inventor： Sujith Nair ,  Sasha Stankovich ,  Yunzhang Wang ,  Venkatkrishna Raghavendran

    IPC: D02G3/36

    CPC classification number: D01F8/06 ,  B32B5/022 ,  B32B5/024 ,  B32B5/026 ,  B32B5/08 ,  B32B5/26 ,  B32B7/02 ,  B32B27/08 ,  B32B27/12 ,  B32B27/32 ,  B32B2262/0253 ,  B32B2262/0261 ,  B32B2262/0269 ,  B32B2262/101 ,  B32B2262/106 ,  B32B2307/54 ,  D06M15/227 ,  Y10T428/2913 ,  Y10T428/2929 ,  Y10T428/2973 ,  Y10T428/2976 ,  Y10T428/2978

    Abstract: A multi-layered fiber including a core, a first layer, and a second layer. The core has an exterior surface portion containing polypropylene. The first layer is disposed on at least a portion of the core and contains a first polymer. The first polymer contains a polymer having at least 70% α-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second layer is disposed on at least a portion of the first layer and contains a second polymer. The second polymer contains a co-polymer having at least 50% α-olefin units and is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface portion of the core. The viscosity of the second polymer is not greater than about 10 percent of the viscosity of the first polymer measured at 170° C. Methods of forming the multi-layered fiber are also disclosed.

    Abstract translation: 一种多层纤维，包括芯，第一层和第二层。 芯具有包含聚丙烯的外表面部分。 第一层设置在芯的至少一部分上并且包含第一聚合物。 第一聚合物含有具有至少70％的α-烯烃单元的聚合物，其特征在于熔融温度低于芯的外表面部分的熔融温度。 第二层设置在第一层的至少一部分上并且包含第二聚合物。 第二聚合物含有具有至少50％α-烯烃单元的共聚物，其特征在于数均分子量为约7,000g / mol至50,000g / mol，粘度在约2,500至150,000cP之间 170℃，并且熔融温度低于芯的外表面部分的熔融温度。 第二聚合物的粘度不高于在170℃下测量的第一聚合物的粘度的约10％。还公开了形成多层纤维的方法。

    Consolidated Fibrous Structure
    3.
    发明申请
    Consolidated Fibrous Structure 有权
    综合纤维结构

    公开(公告)号：US20100190399A1

    公开(公告)日：2010-07-29

    申请号：US12360560

    申请日：2009-01-27

    Applicant: Sujith Nair ,  Sasha Stankovich ,  Yunzhang Wang ,  Venkatkrishna Raghavendran

    Inventor： Sujith Nair ,  Sasha Stankovich ,  Yunzhang Wang ,  Venkatkrishna Raghavendran

    IPC: B32B5/12

    CPC classification number: B32B27/32 ,  B32B5/022 ,  B32B5/024 ,  B32B5/026 ,  B32B5/08 ,  B32B5/26 ,  B32B7/02 ,  B32B27/08 ,  B32B27/12 ,  B32B2262/0253 ,  B32B2262/0261 ,  B32B2262/0269 ,  B32B2262/101 ,  B32B2262/106 ,  B32B2307/54 ,  D01F8/06 ,  Y10T428/249924 ,  Y10T428/269 ,  Y10T428/2929 ,  Y10T428/2931 ,  Y10T442/2008 ,  Y10T442/651

    Abstract: A consolidated fibrous structure including a multiplicity of fibrous layers. The fibers of each fibrous layer contain a core, a first layer and a second layer. The core has an exterior surface portion containing polypropylene. The first layer is disposed on at least a portion of the core and contains a first polymer. The first polymer contains a polymer having at least 70% α-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second layer is disposed on at least a portion of the first layer and contains a second polymer. The second polymer contains a co-polymer having at least 50% α-olefin units and is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface portion of the core. The viscosity of the second polymer is not greater than about 10 percent of the viscosity of the first polymer measured at 170° C. At least a portion of the second layers of the fibers in each fibrous layer are fused to at least a portion of other first or second layers of the fibers within the same fibrous layer, at least a portion of the second layers of the fibers of each fibrous layer are fused with at least a portion of the first or second layers of the fibers in an adjacent fibrous layer, and the stiffness of the consolidated fibrous structure is at least 1 N-m. A fibrous layer is also described.

    Abstract translation: 包含多个纤维层的固结纤维结构。 每个纤维层的纤维包含芯，第一层和第二层。 芯具有包含聚丙烯的外表面部分。 第一层设置在芯的至少一部分上并且包含第一聚合物。 第一聚合物含有具有至少70％的α-烯烃单元的聚合物，其特征在于熔融温度低于芯的外表面部分的熔融温度。 第二层设置在第一层的至少一部分上并且包含第二聚合物。 第二聚合物含有具有至少50％α-烯烃单元的共聚物，其特征在于数均分子量为约7,000g / mol至50,000g / mol，粘度在约2,500至150,000cP之间 170℃，并且熔融温度低于芯的外表面部分的熔融温度。 第二聚合物的粘度不大于在170℃下测量的第一聚合物的粘度的约10％。每个纤维层中纤维的第二层的至少一部分与其它的至少一部分融合 在相同的纤维层内的第一或第二层纤维，每个纤维层的纤维的第二层的至少一部分与相邻纤维层中纤维的第一或第二层的至少一部分熔合， 并且固结纤维结构的刚度至少为1Nm。 还描述了纤维层。

    Consolidated Fibrous Structure
    4.
    发明申请
    Consolidated Fibrous Structure 有权
    综合纤维结构

    公开(公告)号：US20100190398A1

    公开(公告)日：2010-07-29

    申请号：US12360553

    申请日：2009-01-27

    Applicant: Sujith Nair ,  Serbia Stankovich ,  Yunzhang Wang ,  Venkatkrishna Raghavendran

    Inventor： Sujith Nair ,  Serbia Stankovich ,  Yunzhang Wang ,  Venkatkrishna Raghavendran

    IPC: B32B5/12

    CPC classification number: B32B5/26 ,  B32B5/022 ,  B32B5/024 ,  B32B5/026 ,  B32B5/08 ,  B32B7/02 ,  B32B27/08 ,  B32B27/12 ,  B32B27/32 ,  B32B2262/0253 ,  B32B2262/0261 ,  B32B2262/0269 ,  B32B2262/101 ,  B32B2262/106 ,  B32B2307/54 ,  Y10T428/249924 ,  Y10T428/269 ,  Y10T428/2929 ,  Y10T428/2933 ,  Y10T428/2938 ,  Y10T442/2008 ,  Y10T442/3049 ,  Y10T442/637 ,  Y10T442/641 ,  Y10T442/651

    Abstract: A consolidated fibrous structure including a multiplicity of fibrous layers. The fibers of each fibrous layer contain a core and a skin layer. The core has an exterior surface portion containing polypropylene. The skin layer is disposed on at least a portion of the core and contains a first polymer and a second polymer. The first polymer contains a polymer having at least 70% α-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second polymer contains a co-polymer having at least 50% α-olefin units and is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface portion of the core. The viscosity of the second polymer is not greater than about 10 percent of the viscosity of the first polymer measured at 170° C. At least a portion of the skin layers of the fibers in each fibrous layer are fused to at least a portion of other skin layers of fibers within the same fibrous layer, at least a portion of the skin layers of the fibers of each fibrous layer are fused with at least a portion of the skin layers of the fibers in an adjacent fibrous layer, and the stiffness of the consolidated fibrous structure is at least 1 N-m. A fibrous layer is also described.

    Abstract translation: 包含多个纤维层的固结纤维结构。 每个纤维层的纤维含有核心和皮肤层。 芯具有包含聚丙烯的外表面部分。 表层设置在芯的至少一部分上并含有第一聚合物和第二聚合物。 第一聚合物含有具有至少70％的α-烯烃单元的聚合物，其特征在于熔融温度低于芯的外表面部分的熔融温度。 第二聚合物含有具有至少50％α-烯烃单元的共聚物，其特征在于数均分子量为约7,000g / mol至50,000g / mol，粘度在约2,500至150,000cP之间 170℃，并且熔融温度低于芯的外表面部分的熔融温度。 第二聚合物的粘度不大于在170℃下测量的第一聚合物的粘度的约10％。每个纤维层中纤维的至少一部分表皮层与至少一部分其它纤维层融合 在同一纤维层内的纤维表皮层，每个纤维层的纤维表层的至少一部分与相邻纤维层中的至少一部分纤维的表皮层熔合， 固结的纤维结构至少为1Nm。 还描述了纤维层。

    Method of Forming a Consolidated Fibrous Structure
    8.
    发明申请
    Method of Forming a Consolidated Fibrous Structure 有权
    形成合并纤维结构的方法

    公开(公告)号：US20100186880A1

    公开(公告)日：2010-07-29

    申请号：US12360542

    申请日：2009-01-27

    Applicant: Sujith Nair ,  Sasha Stankovich ,  Yunzhang Wang ,  Venkatkrishna Raghavendran ,  Howell B. Eleazer

    Inventor： Sujith Nair ,  Sasha Stankovich ,  Yunzhang Wang ,  Venkatkrishna Raghavendran ,  Howell B. Eleazer

    IPC: B29C70/52

    CPC classification number: B29C70/10 ,  B29C70/46 ,  B29K2223/00

    Abstract: A method of consolidating thermoplastic fibrous layers. The method begins with providing a plurality of fibers, where the fibers have a core with an exterior surface portion comprising polypropylene and a first layer disposed on at least a portion of the core. The first layer contains a first polymer, where the first polymer contains at least 70% α-olefin units and is characterized by a melting temperature less than the melting temperature of the exterior surface of the core. These fibers are formed into a fibrous layer. Next, a second layer is applied to the fibrous layer such that the second layer covers at least a portion of the first layers of the fibers. The second layer contains a second polymer being a co-polymer having at least 50% α-olefin units which is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface of the core. The viscosity of the second polymer is less than a tenth of the viscosity of the first polymer measured at 170° C. Next, heat and optionally pressure are applied to the fibrous layer causing at least a portion of the second layers of the fibers in each fibrous layer to fuse to other first or second layers of the fibers within the same fibrous layer, at least a portion of the second layers of the fibers of each fibrous layer fuse with at least a portion of the first or second layers of the fibers in an adjacent fibrous layer, and at least a portion of the interstices to be filled with a blend of the first and second polymers, where the blend filling the interstices comprises at least 80% wt the second polymer.

    Abstract translation: 一种固结热塑性纤维层的方法。 该方法开始于提供多个纤维，其中纤维具有芯，其具有包括聚丙烯的外表面部分和设置在芯的至少一部分上的第一层。 第一层包含第一聚合物，其中第一聚合物含有至少70％的α-烯烃单元，其特征在于熔融温度低于芯的外表面的熔融温度。 这些纤维形成纤维层。 接下来，将第二层施加到纤维层，使得第二层覆盖纤维的第一层的至少一部分。 第二层包含第二聚合物，其是具有至少50％的α-烯烃单元的共聚物，其特征在于数均分子量为约7,000g / mol至50,000g / mol，粘度为约2,500和 在170℃下测量150,000cP，并且熔融温度低于芯的外表面的熔融温度。 第二聚合物的粘度小于在170℃下测量的第一聚合物的粘度的十分之一。接下来，将热量和任选压力施加到纤维层，使纤维层中的每个纤维的至少一部分第二层纤维 纤维层，以在相同的纤维层内融合到纤维的其它第一或第二层，每个纤维层的纤维的第二层的至少一部分与纤维的第一或第二层的至少一部分融合 相邻的纤维层，以及要填充第一和第二聚合物的共混物的空隙的至少一部分，其中填充空隙的共混物包含至少80重量％的第二聚合物。

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