公开(公告)号：US4902452A

公开(公告)日：1990-02-20

申请号：US78510

申请日：1987-07-28

申请人： Yoshihiro Nishihara ,  Yoshifumi Furutani ,  Masaaki Toramaru ,  Toshiyuki Yasunaga

发明人： Yoshihiro Nishihara ,  Yoshifumi Furutani ,  Masaaki Toramaru ,  Toshiyuki Yasunaga

IPC分类号： D01D5/06 ,  D01F6/18

CPC分类号： D01F6/18 ,  D01D5/06

摘要： A process for producing an acrylic fiber comprising the steps of:(a) dissolving a polymer having a weight-average molecular weight of at least 5.times.10.sup.5 and containing at least 80 wt. % acrylonitrile in a solvent comprising dimethylformamide or dimethylacetamide at a polymer concentration of 5-15 wt. % to provide a spinning solution having a viscosity of 500-1,500 poises at 45.degree. C.;(b) extruding the solution into a gaseous medium to form filaments;(c) introducing the filaments into a coagulation bath comprising water and at least one of dimethylformamide and dimethylacetamide at 0.degree. C. or below; and(d) stretching the coagulated filaments to a draw ratio of at least 3 to provide an acrylic fiber having at least 90% X-ray orientation and an X-ray crystallinity parameter of up to 1 degree. The resulting acrylic fiber has high strength and high modulus.

摘要翻译： 一种制备丙烯酸纤维的方法，包括以下步骤：（a）将重均分子量为至少5×10 5，含有至少80重量％ ％丙烯腈在包含二甲基甲酰胺或二甲基乙酰胺的溶剂中，聚合物浓度为5-15wt。 以提供在45℃下具有500-1,500泊的粘度的纺丝溶液。 （b）将溶液挤出到气态介质中以形成长丝; （c）在0℃或更低的温度下将细丝引入包含水和至少一种二甲基甲酰胺和二甲基乙酰胺的凝结浴中; 和（d）将凝固的细丝拉伸至3的拉伸比，以提供具有至多1度的至少90％X射线取向和X射线结晶度参数的丙烯酸类纤维。 得到的丙烯酸纤维具有高强度和高模量。

公开(公告)号：US4831069A

公开(公告)日：1989-05-16

申请号：US121241

申请日：1987-11-16

申请人： Teruhiko Sugimori ,  Yoshifumi Furutani ,  Yoshinobu Shiraishi ,  Toshiyuki Yasunaga

发明人： Teruhiko Sugimori ,  Yoshifumi Furutani ,  Yoshinobu Shiraishi ,  Toshiyuki Yasunaga

IPC分类号： D01F6/18

CPC分类号： D01F6/18

摘要： A spinning solution for acrylonitrile polymers is disclosed, which has a viscosity of 30 to 520 poises (at 50.degree. C.) and which comprises an acrylonitrile polymer having a reduced viscosity of not less than 4.0, a solvent, and water, wherein the water concentration and the polymer concentration fall within the range in the drawing surrounded by straight lines connecting point A (1 wt % and 30 wt % respectively), point B (1 wt % and 10 wt % respectively), and point C (10 wt % and 10 wt % respectively). The spinning solution exhibits satisfactory spinnability in spite of its high polymer concentration and provides void-free acrylonitrile fibers having a highly circular cross-section and excellent mechanical strength.

摘要翻译： 公开了一种丙烯腈聚合物的纺丝溶液，其具有30至520泊（在50℃）的粘度，并且其包含具有不低于4.0的比浓粘度的丙烯腈聚合物，溶剂和水，其中水 浓度和聚合物浓度落在由连接点A（分别为1重量％和30重量％），点B（分别为1重量％和10重量％）和点C（10重量％）的直线包围的图中的范围内， 和10重量％）。 纺丝溶液虽然具有高聚合物浓度，但表现出令人满意的可纺性，并提供具有高圆形横截面和优异的机械强度的无孔丙烯腈纤维。