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    • 1. 发明授权
    • Composite active filter material
    • 复合有源滤材
    • US4619948A
    • 1986-10-28
    • US689249
    • 1985-01-07
    • T. Scott KennedyPaul F. Herman
    • T. Scott KennedyPaul F. Herman
    • A41D13/11A62B23/02B01D39/16C08J9/02C08G18/14A24B15/28B29C67/00
    • C08J9/02A41D13/1146A62B23/02B01D39/1676C08J2375/04Y10S264/13Y10S425/816
    • A reticulated hydrophilic foam substrate and bonded active surface particle powder composite filter material is generated by foam polymerization of a prepolymer phase with an aqueous phase. The reticulated hydrophilic foam substrate is characterized by relatively low pressure drop and low resistance to flow through the foam substrate. The prepolymer phase is a hydrophilic polyurethane prepolymer receptive to the aqueous phase for foam polymerization upon mixing with the aqueous phase. The aqueous phase in turn is a pourable and flowable slurry mixture of water, active surface particle powder, and surfactant wetting agent. The aqueous phase includes sufficient water or other evaporable liquid to provide a protective liquid layer or coating over the active surfaces of the powder particles. Upon polymerization of the mixture the active surface powder particles are distributed over and bonded to the webs of the reticulated hydrophilic foam and the major portion of the active surfaces are free from obstruction and available for active filter functioning. The aqueous phase and prepolymer phase upon mixing may be poured, flowed, or injected into a suitable respirator or mask mold to provide a lightweight single piece respirator face mask.
    • 通过预聚物相与水相的泡沫聚合产生网状亲水性泡沫基材和粘合的活性表面颗粒粉末复合材料过滤材料。 网状亲水性泡沫基材的特征在于相对低的压降和低的流过泡沫基材的阻力。 预聚物相是在与水相混合时接受水相的亲水性聚氨酯预聚物进行泡沫聚合。 水相依次是水,活性表面颗粒粉末和表面活性剂润湿剂的可倾倒和可流动的浆料混合物。 水相包括足够的水或其它可蒸发的液体,以在粉末颗粒的活性表面上提供保护性液体层或涂层。 在混合物聚合时,活性表面粉末颗粒分布在网状亲水性泡沫的网上并结合到网状亲水性泡沫的网上,并且主要表面的主要部分没有阻塞并且可用于主动过滤器功能。 混合后的水相和预聚物相可以倾倒,流动或注入合适的呼吸器或掩模模具中以提供轻质的单件式呼吸器面罩。