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    • 5. 发明授权
    • Soft films having enhanced physical properties
    • 软膜具有增强的物理性能
    • US5376439A
    • 1994-12-27
    • US219754
    • 1994-03-29
    • William J. HodgsonRichard W. HalleCharles L. Pierce
    • William J. HodgsonRichard W. HalleCharles L. Pierce
    • B29C47/88B29K23/00B29L7/00B32B27/32C08J5/18C08L23/04C08L23/06C08L23/08C08L23/18
    • C08J5/18B32B27/322C08L23/0815C08J2323/04C08L23/06Y10S526/943Y10T428/31913
    • The present invention provides for a polymer composition comprising a blend of from about 25 to about 90% by weight of a very low density ethylene polymer having a density on the range of from about 0.88 to 0.925 g/cm.sup.3, a melt index of from about 0.5 to about 7.5 dg/min, a molecular weight distribution not greater than about 3.5 and a compositional distribution breadth index greater than about 70%, and from about 10 to about 75% by weight of a low to medium density ethylene polymer having a density of from about 0.910 to about 0.935, a melt index of from about 0.5 to about 20, a molecular weight distribution greater than about 3.5 and a compositional breadth index less than about 70%.The invention also provides for films prepared from this blend having single layer construction or having laminar ABA construction wherein the A or skin layers comprise the blend of this invention and the B or core layer comprises a different olefin polymer such as high density polyethylene.Films of this invention exhibit excellent elongation, tensile and impact properties and also softness, feel and noise properties which render them eminently suitable for use as back sheet components in the fabrication of absorbent articles such as diapers, bed pads and like articles where such properties are desirable.
    • 本发明提供一种聚合物组合物,其包含约25至约90重量%的密度为约0.88至0.925g / cm 3的非常低密度乙烯聚合物的共混物,熔体指数为约 0.5至约7.5dg / min,分子量分布不大于约3.5,组成分布宽度指数大于约70%,约10至约75重量%的具有密度的低至中密度乙烯聚合物 约0.910至约0.935,熔体指数为约0.5至约20,分子量分布大于约3.5,组分宽度指数小于约70%。 本发明还提供由具有单层结构或具有层状ABA结构的该共混物制备的膜,其中A或表层包含本发明的共混物,B或芯层包含不同的烯烃聚合物,例如高密度聚乙烯。 本发明的薄膜表现出优异的伸长率,拉伸和冲击性能以及柔软度,手感和噪音性能,使其非常适合用作制造吸收制品如尿布,床垫和类似物品的背板组件, 合意。