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    • 6. 发明授权
    • Ultrasonically-assisted process for making differential density
cellulosic structure containing fluid-latent indigenous polymers
    • 用于制备含有流体潜在的本地聚合物的差示密度纤维素结构的超声辅助方法
    • US6090241A
    • 2000-07-18
    • US65655
    • 1998-04-23
    • Paul Dennis TrokhanNagabhusan Senapati
    • Paul Dennis TrokhanNagabhusan Senapati
    • D21H27/00D21F3/00D21F5/02D21F11/00D21H11/00
    • D21F11/006
    • A process and an apparatus for making a differential density cellulosic web comprising a first plurality of high-density micro-regions and a second plurality of low-density micro-regions are disclosed. The process comprises the steps of providing a fibrous web containing fluid-latent indigenous polymers and water; depositing the web on a fluid-permeable molding fabric; applying ultrasonic energy to the web, thereby contributing to softening of the fluid-latent indigenous polymers in at least selected portions of the web; impressing the molding fabric into the web, thereby densifying the selected portions of the web and causing the fluid-latent indigenous polymers to flow and interconnect the fibers which are mutually juxtaposed in the selected portions; and immobilizing the fluid-latent indigenous polymers, thereby creating bonds thereof between the fibers which are interconnected in the selected portions. An apparatus comprises an ultrasonic means for applying ultrasonic energy to the web associated with the molding fabric, and a pressing means for impressing the molding fabric into the web.
    • 公开了一种用于制造包含第一多个高密度微区域和第二多个低密度微区域的差分密度纤维素网的方法和设备。 该方法包括以下步骤:提供含有流体 - 潜在的本地聚合物和水的纤维网; 将纸幅沉积在流体可渗透的成型织物上; 将超声能量施加到幅材上,由此有助于在幅材的至少选定部分中的流体潜在的本地聚合物的软化; 将模制织物压印到网中,从而使网的选定部分致密化并使流体潜在的本地聚合物流动并互连在所选部分中相互并置的纤维; 并固定流体潜在的本地聚合物,由此在被选择的部分互连的纤维之间产生粘结。 一种装置包括用于对与成型织物相关联的幅材施加超声能量的超声波装置和用于将成型织物压印到幅材中的加压装置。