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    • 7. 发明申请
    • Renewable Polyester Film having a Low Modulus and High Tensile Elongation
    • 具有低模量和高拉伸伸长率的可再生聚酯薄膜
    • US20150159012A1
    • 2015-06-11
    • US14618344
    • 2015-02-10
    • Kimberly-Clark Worldwide, Inc.
    • Vasily A. TopolkaraevRyan J. McEneanyNeil T. SchollThomas A. Eby
    • C08L67/04B32B27/36
    • 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.
    • 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。