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    Modified polylactic acid fibers
    4.
    发明授权
    Modified polylactic acid fibers 有权

    公开(公告)号：US10718069B2

    公开(公告)日：2020-07-21

    申请号：US14521511

    申请日：2014-10-23

    申请人： Kimberly-Clark Worldwide, Inc.

    发明人： Vasily A. Topolkaraev ,  Ryan J. McEneany ,  Thomas A. Eby ,  Tyler J. Lark

    IPC分类号： D01F6/62 ,  B29C48/16 ,  D01D5/38 ,  D01F1/02 ,  D04H3/011 ,  D04H3/16 ,  C08L67/04 ,  D01F6/92 ,  C08G63/08 ,  B29K63/00 ,  B29K67/00 ,  B29K105/00

    摘要： A method for forming biodegradable fibers is provided. The method includes blending polylactic acid with a polyepoxide modifier to form a thermoplastic composition, extruding the thermoplastic composition through a die, and thereafter passing the extruded composition through a die to form a fiber. Without intending to be limited by theory, it is believed that the polyepoxide modifier reacts with the polylactic acid and results in branching of its polymer backbone, thereby improving its melt strength and stability during fiber spinning without significantly reducing glass transition temperature. The reaction-induced branching can also increase molecular weight, which may lead to improved fiber ductility and the ability to better dissipate energy when subjected to an elongation force. Through selective control over this method, the present inventors have discovered that the resulting fibers may exhibit good mechanical properties, both during and after melt spinning.

    Renewable Polyester Film having a Low Modulus and High Tensile Elongation
    8.
    发明申请
    Renewable Polyester Film having a Low Modulus and High Tensile Elongation 审中-公开
    具有低模量和高拉伸伸长率的可再生聚酯薄膜

    公开(公告)号：US20150159012A1

    公开(公告)日：2015-06-11

    申请号：US14618344

    申请日：2015-02-10

    申请人： Kimberly-Clark Worldwide, Inc.

    发明人： Vasily A. Topolkaraev ,  Ryan J. McEneany ,  Neil T. Scholl ,  Thomas A. Eby

    IPC分类号： C08L67/04 ,  B32B27/36

    摘要： A film that is formed from a thermoplastic composition is provided. The thermoplastic composition contains a rigid renewable polyester and a polymeric toughening additive. The toughening additive can be dispersed as discrete physical domains within a continuous matrix of the renewable polyester. An increase in deformation force and elongational strain causes debonding to occur in the renewable polyester matrix at those areas located adjacent to the discrete domains. This can result in the formation of a plurality of voids adjacent to the discrete domains that can help to dissipate energy under load and increase tensile elongation. To even further increase the ability of the film to dissipate energy in this manner, the present inventors have discovered that an interphase modifier may be employed that reduces the degree of friction between the toughening additive and renewable polyester and thus reduces the stiffness (tensile modulus) of the film.

    摘要翻译： 提供由热塑性组合物形成的膜。 热塑性组合物含有刚性可再生聚酯和聚合物增韧添加剂。 增韧添加剂可以作为可再生聚酯的连续基质中的离散物理区域分散。 变形力和伸长应变的增加导致可再生聚酯基体在与离散区域相邻的那些区域发生剥离。 这可能导致形成邻近离散区域的多个空隙，其可以帮助在负载下耗散能量并增加拉伸伸长率。 为了进一步提高膜以这种方式耗散能量的能力，本发明人已经发现，可以使用降低增韧添加剂和可再生聚酯之间的摩擦程度的相间改性剂，从而降低刚度（拉伸模量） 的电影。