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    • 35. 发明授权
    • Differential density cellulosic structure and process for making same
    • 差示密度纤维素结构及其制备方法
    • US5935381A
    • 1999-08-10
    • US870535
    • 1997-06-06
    • Paul Dennis TrokhanMark Ryan RichardsMichael Gomer Stelljes, Jr.
    • Paul Dennis TrokhanMark Ryan RichardsMichael Gomer Stelljes, Jr.
    • D21H27/00D21F3/00D21F5/02D21F11/00D21H11/00
    • D21F11/006
    • A differential density single lamina web of cellulosic fibers comprises at least two pluralities of micro-regions disposed in a non-random and repeating pattern: a first plurality of high density regions and a second plurality of low density regions. The high density regions comprise cellulosic fibers comprising fluid latent indigenous polymers (FLIP), such as hemicelluloses and lignin. The fibers of the high-density regions are FLIP-bonded, i.e., bonded together by a process of softening, flowing and immobilization of the FLIP between the cellulosic fibers of the high density regions. The process for making the web comprises the steps of providing a plurality of papermaking fibers comprising FLIP; providing a macroscopically monoplanar papermaking belt having a web-facing surface and deflection conduits; depositing the plurality of the cellulosic fibers on the papermaking belt to form a web; heating the web to a temperature sufficient to cause the FLIP contained in a first portion associated with the web-facing surface of the belt to soften; impressing the web-side surface of the belt into the web; immobilizing the flowable FLIP and creating FLIP-bonds between the fibers comprising the first portion of the web.
    • 纤维素纤维的差别密度单层网包括以非随机和重复图案布置的至少两个微区域:第一多个高密度区域和第二多个低密度区域。 高密度区域包括包含流体潜在的本地聚合物(FLIP)的纤维素纤维,例如半纤维素和木质素。 高密度区域的纤维是FLIP粘合的,即通过FLIP软化,流动和固定在高密度区域的纤维素纤维之间的方法结合在一起。 制造网的方法包括提供多个包含FLIP的造纸纤维的步骤; 提供具有卷筒纸表面和偏转导管的宏观单平面造纸带; 将多个纤维素纤维沉积在造纸带上以形成网; 将幅材加热到足以使包含在与带的面向卷筒纸的表面相关联的第一部分中的FLIP软化的温度; 将带的腹板侧表面压入网中; 固定可流动的FLIP并在包含纤维网的第一部分的纤维之间产生FLIP粘合。