Process for the preparation of regenerated cellulose filaments
    2.
    发明授权
    Process for the preparation of regenerated cellulose filaments 失效
    制备再生纤维素长丝的方法

    公开(公告)号:US5997790A

    公开(公告)日:1999-12-07

    申请号:US97534

    申请日:1998-05-19

    摘要: The disclosure describes a process for the preparation of regenerated cellulose filaments from an anisotropic solution including cellulose formate, phosphoric acid, and formic acid in which the formed cellulose formate filaments are dried to a moisture content of not more than 15% prior to regeneration and after regeneration the filaments are washed and dried under low tension. In this manner cellulose multifilament yarns of high breaking load and high elongation at break can be obtained, which in addition have a very regular linear density.

    摘要翻译: 本公开内容描述了一种从包括甲酸纤维素,磷酸和甲酸的各向异性溶液制备再生纤维素长丝的方法,其中所形成的纤维素甲酸纤维素在再生之前和之后干燥至含水量不超过15% 再生长丝在低张力下被洗涤和干燥。 以这种方式,可以获得高断裂负荷和高断裂伸长率的纤维素复丝纱线,此外还具有非常规则的线密度。

    Method for preparing a cellulose formate solution by impregnating and
kneading cellulose slabs
    5.
    发明授权
    Method for preparing a cellulose formate solution by impregnating and kneading cellulose slabs 失效
    通过浸渍和捏合纤维素板制备甲酸纤维素溶液的方法

    公开(公告)号:US6022614A

    公开(公告)日:2000-02-08

    申请号:US981594

    申请日:1998-03-17

    摘要: Process for preparing a solution of cellulose formate from cellulose plates, in particular high-density plates, without prior mechanical destruction of these plates. The plates are dissolved directly, by means of an impregnating step of the whole plates in a base liquid of formic acid, followed by an operation of kneading of the plates thus impregnated in contact with both formic acid and phosphoric acid. The process is preferably carried out in order to prepare ready-for-spinning solutions with, in particular, if necessary, an intermediate operation of adjustment of the final composition. Solutions prepared using such a process. Preparation of objects made of cellulose, starting with these solutions, in particular fibers or films. Assemblies of such fibers or films. Articles reinforced with such fibers or films or assemblies, these reinforced articles being especially tires.

    摘要翻译: PCT No.PCT / EP96 / 02827 Sec。 371日期:1998年3月17日 102(e)1998年3月17日PCT PCT 1996年6月28日PCT公布。 第WO97 / 02292号公报 日期1997年1月23日从纤维素板,特别是高密度板制备纤维素甲酸酯的方法,没有这些板的预先机械破坏。 通过将整个板的浸渍步骤直接溶解在甲酸的基础液中,然后对由此浸渍的与二甲酸和磷酸接触的板进行捏合操作。 该方法优选进行以便制备即将纺丝的溶液,特别是如果必要的话,调整最终组合物的中间操作。 使用这种过程准备的解决方案。 由这些溶液,特别是纤维或薄膜开始制备由纤维素制成的物体。 这种纤维或薄膜的组件。 用这种纤维或膜或组件增强的制品,这些增强制品特别是轮胎。

    METHOD FOR DISSOLVING ARAMID POLYMER IN SULFURIC ACID USING A DOUBLE SHAFT KNEADER
    7.
    发明申请
    METHOD FOR DISSOLVING ARAMID POLYMER IN SULFURIC ACID USING A DOUBLE SHAFT KNEADER 有权
    使用双轴KNEADER分解硫酸中的ARAMID聚合物的方法

    公开(公告)号:US20100063205A1

    公开(公告)日:2010-03-11

    申请号:US12448811

    申请日:2008-01-30

    IPC分类号: C08L77/00 C08G69/00

    摘要: A method for dissolving an aramid polymer in sulfuric acid using a double shaft kneader, comprising the steps: dosing the polymer and the solvent into the kneader, mixing the polymer and the solvent to dissolve the polymer in the solvent for obtaining a solution, degassing the solution to obtain a spin dope, and transporting the spin dope out of the kneader, wherein the polymer is an aramid polymer and the solvent is sulfuric acid, and whereby the aramid polymer is dosed into the kneader prior to dosing the sulfuric acid into the kneader.

    摘要翻译: 一种使用双轴捏和机将芳族聚酰胺聚合物溶解在硫酸中的方法,包括以下步骤:将聚合物和溶剂投入到捏合机中,混合聚合物和溶剂以将聚合物溶解在溶剂中以获得溶液,脱气 溶液以获得旋涂液,并将旋转纺丝液输送出捏合机,其中聚合物是芳族聚酰胺聚合物,溶剂是硫酸,由此在将硫酸加入到捏合机中之前将芳族聚酰胺聚合物加入捏合机中 。

    Method for dissolving aramid polymer in sulfuric acid using a double shaft kneader
    9.
    发明授权
    Method for dissolving aramid polymer in sulfuric acid using a double shaft kneader 有权
    使用双轴捏合机将芳族聚酰胺聚合物溶解在硫酸中的方法

    公开(公告)号:US08309642B2

    公开(公告)日:2012-11-13

    申请号:US12448811

    申请日:2008-01-30

    IPC分类号: C08G69/26

    摘要: A method for dissolving an aramid polymer in sulfuric acid using a double shaft kneader, comprising the steps: dosing the polymer and the solvent into the kneader, mixing the polymer and the solvent to dissolve the polymer in the solvent for obtaining a solution, degassing the solution to obtain a spin dope, and transporting the spin dope out of the kneader, wherein the polymer is an aramid polymer and the solvent is sulfuric acid, and whereby the aramid polymer is dosed into the kneader prior to dosing the sulfuric acid into the kneader.

    摘要翻译: 一种使用双轴捏和机将芳族聚酰胺聚合物溶解在硫酸中的方法,包括以下步骤:将聚合物和溶剂投入到捏合机中,混合聚合物和溶剂以将聚合物溶解在溶剂中以获得溶液,脱气 溶液以获得旋涂液,并将旋转纺丝液输送出捏合机,其中聚合物是芳族聚酰胺聚合物,溶剂是硫酸,由此在将硫酸加入到捏合机中之前将芳族聚酰胺聚合物加入捏合机中 。

    Method for dissolving PPTA in sulfuric acid using a twin screw extruder
    10.
    发明授权
    Method for dissolving PPTA in sulfuric acid using a twin screw extruder 有权
    使用双螺杆挤出机将PPTA溶解在硫酸中的方法

    公开(公告)号:US07527841B2

    公开(公告)日:2009-05-05

    申请号:US11663980

    申请日:2005-10-20

    IPC分类号: B29C70/08

    摘要: Described is a method for dissolving PPTA or copolymers thereof in sulfuric acid using a twin screw extruder having transporting, mixing, and kneading elements with an entering zone, an intermediate zone, a mixing zone, a negative transport zone, a degassing zone, and a pressure build-up zone. The method includes transporting PPTA or copolymer thereof into the entering zone at a transport capacity low enough as to prevent sulfuric acid entering the entering zone; introducing sulfuric acid in the intermediate zone; essentially fully filling the mixing zone to allow sufficient time to mix and dissolve PPTA or copolymer thereof in the sulfuric acid to obtain a PPTA or copolymer-sulfuric acid solution; creating after the mixing zone a negative transport zone to obtain a product lock between the mixing zone and the degassing zone; creating a thin film of the PPTA or copolymer-sulfuric acid solution in the degassing zone to degas the solution; and entering the solution into the output pressure build-up zone to partially fill this zone and to leave the twin screw extruder.

    摘要翻译: 描述了使用具有输送区域,中间区域,混合区域,负运送区域,脱气区域和输送区域的输送,混合和捏合元件的双螺杆挤出机将PPTA或其共聚物溶解在硫酸中的方法。 压力积聚区。 该方法包括以足够低的运输能力将PPTA或其共聚物输送到进入区域中,以防止硫酸进入进入区域; 在中间区引入硫酸; 基本上完全填充混合区以允许足够的时间将PPTA或其共聚物混合并溶解在硫酸中以获得PPTA或共聚物 - 硫酸溶液; 在混合区之后产生负运送区,以在混合区和脱气区之间获得产品锁; 在脱气区中形成PPTA或共聚物 - 硫酸溶液的薄膜,使溶液脱气; 并将溶液进入输出压力累积区以部分填充该区域并离开双螺杆挤出机。