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    • 31. 发明申请
    • PROCESS FOR PRODUCING NANOFIBERS
    • 生产NANOFIBERS的工艺
    • US20080057307A1
    • 2008-03-06
    • US11694087
    • 2007-03-30
    • Evan E. KoslowAnil C. Suthar
    • Evan E. KoslowAnil C. Suthar
    • D01D5/40
    • D01D5/423D21D1/02D21D1/20D21D1/34D21H11/18Y10T428/2913
    • A process for making nanofibers includes preparing a fluid suspension of fibers, shear refining the fibers to create fibrillated fibers, and subsequently closed channel refining or homogenizing the fibrillated fibers to detach nanofibers from the fibrillated fibers. The shear refining of the fibers in the fluid suspension generates fiber cores having attached nanofibers. The closed channel refining or homogenizing of the fibrillated fibers is initially at a first shear rate and, subsequently, at a second, higher shear rate, to detach nanofibers from fiber cores and to create additional nanofibers from the fiber cores. The fiber suspension may flow continuously from the shear refining to the closed channel refining or homogenizing, and include controlling the rate of flow of the fiber suspension from the shear refining to the closed channel refining or homogenizing.
    • 制备纳米纤维的方法包括制备纤维的流体悬浮液,剪切精制纤维以产生原纤化纤维,随后封闭通道精炼或均化原纤化纤维以将纳米纤维从原纤化纤维分离。 流体悬浮液中的纤维的剪切精制产生具有附着纳米纤维的纤维芯。 原纤化纤维的闭合通道精炼或均化最初处于第一剪切速率,并且随后以第二较高剪切速率从纳米纤维脱离纤维芯并从纤维芯中产生另外的纳米纤维。 纤维悬浮液可以从剪切精炼连续流动到闭合通道精炼或均化,并且包括控制纤维悬浮液从剪切精炼到闭合通道精炼或均化的流速。
    • 36. 发明授权
    • Fibers and fibrets from blends of polybezimidazoles and aromatic
polyamides, aromatic polyamide-hydrazides or aromatic polyamides
containing heterocyclic linkages
    • 来自聚苯并咪唑和芳族聚酰胺的共混物的纤维和纤维,芳族聚酰胺 - 酰肼或含有杂环键的芳族聚酰胺
    • US5250633A
    • 1993-10-05
    • US647392
    • 1991-01-29
    • Gordon W. CalundannEdward C. CheneveyTai-Shung Chung
    • Gordon W. CalundannEdward C. CheneveyTai-Shung Chung
    • C08L77/00C08L79/02C08L79/04D01D5/40D01F6/90C08L79/06C08L79/08
    • D01F6/905C08L77/00C08L79/02C08L79/04D01D5/40
    • Fibers and fibrets of a novel miscible blend of component polymers comprising from about 5 weight percent to about 95 weight percent of a polybenzimidazole and from about 95 weight percent to about 5 weight percent of an aromatic polyamide, aromatic polyamide-hydrazide or aromatic polyamide containing heterocyclic linkages. Miscibility of the component polymers of the blend is indicated by infrared, X-Ray and Differential Scanning Calorimetry analyses and electron photomicrographs. In fibers or fibrets of a blend mostly comprised of a polybenzimidazole, it is preferred that the aromatic polyamide, aromatic polyamide-hydrazide or aromatic polyamide containing heterocyclic linkages be present in the blend in an amount sufficient to yield a blend with improved tensile properties compared to the polybenzimidazole and more thermally processable than the polybenzimidazole. The fibers or fibrets of the blend have a lower moisture regain than polybenzimidazole fibers or fibrets. In fibers or fibrets of a blend mostly comprised of an aromatic polyamide, aromatic polyamide-hydrazide or aromatic polyamide containing heterocyclic linkages, it is preferred that the polybenzimidazole be present in the blend in an amount sufficient to yield a blend with increased thermal stability and nonflammability compared to the aromatic polyamide, aromatic polyamide-hydrazide or aromatic polyamide containing heterocyclic linkages. The fibers or fibrets may be post-treated with heat or sulfuric acid in order to minimize their shrinkage when they are subsequently subjected to heat and in order to increase their resistance to solvents and acid.
    • 包含约5重量%至约95重量%的聚苯并咪唑和约95重量%至约5重量%的芳族聚酰胺,芳族聚酰胺 - 酰肼或芳族聚酰胺含杂环的组分聚合物的新型可混溶共混物的纤维和纤维 联系。 通过红外,X射线和差示扫描量热法分析和电子显微照片表明共混物的组分聚合物的混溶性。 在主要由聚苯并咪唑组成的共混物的纤维或纤维中,优选芳香族聚酰胺,芳族聚酰胺 - 酰肼或芳族聚酰胺含杂环键以足以产生具有改进的拉伸性能的共混物的量存在于共混物中 聚苯并咪唑,并且比聚苯并咪唑更热可加工。 共混物的纤维或纤维层具有比聚苯并咪唑纤维或纤维的更低的回潮率。 在主要由芳族聚酰胺,芳族聚酰胺 - 酰肼或含有杂环键的芳族聚酰胺组成的共混物的纤维或纤维中,优选聚苯并咪唑以足以产生具有增加的热稳定性和不可燃性的共混物的量存在于共混物中 与芳族聚酰胺,芳族聚酰胺 - 酰肼或含有杂环键的芳族聚酰胺相比。 可以用热或硫酸对纤维或纤维素进行后处理,以便当它们随后经受热量时使其收缩最小化,以增加其对溶剂和酸的耐受性。
    • 38. 发明授权
    • Apparatus for the preparation of bonding fibers from polymer dispersions
    • 用于从聚合物分散体制备粘合纤维的装置
    • US4534720A
    • 1985-08-13
    • US400045
    • 1982-07-20
    • Richard BungKarl GansGerold SchreyerGerhard Welzel
    • Richard BungKarl GansGerold SchreyerGerhard Welzel
    • D01D5/06D01D5/40D04H1/54B22F9/00
    • D01D5/40
    • An apparatus for the preparation of bonding fibers, especially for the production of nonwovens by a wet-lay process, wherein a polymer dispersion, containing an anionic or nonionic dispersant, and an aqueous solution, containing a dissolved cationic precipitant, are combined to cause fiber formation from precipitated polymer particles, which apparatus includes a feed funnel spaced above the bottom of a homogenization vessel with both a nozzle for introducing the polymer dispersion and a metering device for the precipitant, which are so arranged and aimed into the funnel that in co-operation with a stirrer a vortex is produced in a column of liquid in the feed funnel, and fibers are formed and broken up while passing through a turbulence chamber, located at the bottom of the funnel, and a gap into a homogenization chamber.
    • 用于制备粘合纤维的装置,特别是用于通过湿法生产非织造布的装置,其中将含有阴离子或非离子分散剂的聚合物分散体和含有溶解的阳离子沉淀剂的水溶液组合以引起纤维 由沉淀的聚合物颗粒形成,该装置包括在均质化容器的底部间隔开的进料漏斗,其具有用于引入聚合物分散体的喷嘴和用于沉淀剂的计量装置,其被布置和瞄准到漏斗中, 用搅拌器操作,在进料漏斗中的液体柱中产生涡流,并且在通过位于漏斗底部的湍流室和形成均匀化室的间隙中形成纤维并将其分解。
    • 39. 发明授权
    • Dispersion process for preparing thermoplastic resin fiber
    • 制备热塑性树脂纤维的分散工艺
    • US4462948A
    • 1984-07-31
    • US354977
    • 1982-03-05
    • Dorothee M. McClain
    • Dorothee M. McClain
    • C08F6/14C08F218/08C08J3/05D01D5/40D04H13/00
    • C08J3/05D01D5/40D04H13/00D21H5/20
    • A process is disclosed for obtaining olefin-polar comonomer resin in fibrous form. According to the invention, an olefin-polar comonomer resin such as an ethylene-vinyl acetate copolymer is vigorously agitated in molten form in water in the presence of a resin dispersion-forming amount of an alkali metal soap such as sodium stearate and a fiber-forming amount of base such as sodium hydroxide at a temperature below the degradation temperature of the resin to provide a dispersion of said resin in which a substantial number of the individual resin particles are in the form of a fiber possessing an average length of from about 50 to about 2500 microns and an average length to diameter ratio of at least about 3:1. Following cooling of the dispersion to below the solidification point of the resin, the resin fiber may be recovered employing known and conventional means, e.g., filtration, centrifugation, etc.
    • 公开了获得纤维形式的烯烃 - 极性共聚单体树脂的方法。 根据本发明,在树脂分散体形成量的碱金属皂如硬脂酸钠和纤维状聚合物的存在下,将乙烯 - 乙酸乙烯酯共聚物的烯烃 - 极性共聚单体树脂在水中剧烈搅拌, 在低于树脂的降解温度的温度下形成碱如氢氧化钠的量,以提供所述树脂的分散体,其中大量的单个树脂颗粒是平均长度为约50的纤维形式 至约2500微米,平均长径比为至少约3:1。 在将分散体冷却到树脂的凝固点之下之前,可以使用已知和常规方法,例如过滤,离心等来回收树脂纤维。