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    • 3. 发明申请
    • Spunbond method for producing non-woven fabric of natural cellulose with flame-retarding feature
    • 用于生产具有阻燃特性的天然纤维素无纺织物的纺粘方法
    • US20160168772A1
    • 2016-06-16
    • US14663762
    • 2015-03-20
    • Acelon Chemicals and Fiber Corporation
    • Wen-Tung CHOUMing-Yi LAIKun-Shan HUANG
    • D04H1/498D04H1/70D01D1/02D04H1/46D01D5/14D01D10/06
    • D04H3/013D01D5/0985D01F2/00D01F13/02D04H3/105D04H3/11D06M13/292D06M2101/06D06M2200/30Y02P70/627
    • A spunbond method for producing non-woven fabric of natural cellulose with flame-retarding feature comprises following steps. Blend pulp and solvent of N-methylmorpholine N-oxide (NMMO) to form slurry. Evaporate water content from slurry by a Thin Film Evaporator to form dope. Extrude the dope off spin nozzles to form filament strand via spunbond method. Coagulating regenerate, water rinse, hydro-entangled needle-punch and dry the filament strand to form normal natural cellulose nonwoven, which is soaking rolled by flame retardant of N-hydroxymethyl-3-(dimethoxy-phosphate acyl) propyl amide, then orderly bake, alkaline clean, water rinse, dry and wind-up to convert it into modified natural cellulose nonwoven fabrics of long-acting flame retarding feature in coil manner. Because of cross-linking reaction between foregoing flame retardant and natural cellulose nonwoven, the flame-retarding capability thereof meet requirements of testing standards in American ASTM D6413-1999 and ASTM D2863-1995. Moreover, the wastes thereof meet environmental protection requirements.
    • 用于生产具有阻燃特性的天然纤维素无纺织物的纺粘方法包括以下步骤。 混合纸浆和N-甲基吗啉N-氧化物(NMMO)的溶剂形成浆料。 通过薄膜蒸发器从浆液中蒸发水分,形成涂料。 通过旋转喷嘴将纺丝液挤出,通过纺粘法形成丝束。 凝结再生,水冲洗,水缠结针刺,并干燥长丝线以形成通过N-羟甲基-3-(二甲氧基 - 磷酸酯酰基)丙基酰胺的阻燃剂浸泡的普通天然纤维素非织造布,然后有序烘烤 ,碱性清洁,水冲洗,干燥和卷绕,将其转化为线圈式长效阻燃特性的改性天然纤维素无纺布。 由于前述阻燃剂与天然纤维素非织造布之间的交联反应,其阻燃性能符合美国ASTM D6413-1999和ASTM D2863-1995中测试标准的要求。 此外,其废物符合环保要求。
    • 5. 发明授权
    • Removal of contaminants from gas streams in rayon production
    • 在人造丝生产中清除气流中的污染物
    • US06416725B1
    • 2002-07-09
    • US09424118
    • 2000-02-22
    • Edward F. SpinkChristopher R. Mueller
    • Edward F. SpinkChristopher R. Mueller
    • B01D5348
    • B01D53/52B01D53/48C01B17/22C01B32/72D01F13/02Y02P70/627
    • Sulfurous gas streams comprising hydrogen sulfide and carbon disulfide, such as produced as a by-product of the rayon-forming process, are processed to recover the components in a useable form. The gas stream first is contacted with an aqueous sodium hydroxide to dissolve out hydrogen sulfide and some of the carbon disulfide. The dissolved carbon disulfide is driven off from the solution and condensed as a liquid concentrate. Carbon disulfide remaining the gas stream is recovered, such as by condensation. The aqueous sodium sulfide solution which remains from removal of carbon disulfide is concentrated and the pH is adjusted, as necessary, to a value at which the sodium sulfide is predominantly in the form of sodium bisulfide. The concentrated sodium bisulfide solution is capable of reuse in the rayon-forming process along with the liquid concentrate of carbon disulfide.
    • 处理包含硫化氢和二硫化碳的亚硫酸气流,例如作为人造丝形成工艺的副产物而生产的,以可回收的形式回收组分。 首先将气流与氢氧化钠水溶液接触以溶解硫化氢和一些二硫化碳。 溶解的二硫化碳从溶液中排出并作为液体浓缩物浓缩。 残留气流的二硫化碳例如通过冷凝回收。 将从二硫化碳中除去的硫酸钠水溶液浓缩,根据需要将pH调节至硫化钠主要为二硫化
      钠形式的值。 浓缩的二硫化钠溶液能够与人造丝形成过程一起再次与二硫化碳的液体浓缩物一起使用。