-
公开(公告)号：US5273703A
公开(公告)日：1993-12-28
申请号：US929272
申请日：1992-08-13
CPC分类号： D01F6/74
摘要： Improved polybenzoxazole fibers are made by a process for finishing a spun and drawn dope fiber, which contains polybenzoxazole polymer and a solvent acid, including the steps of: (a) coagulating the dope fiber in an aqueous coagulant: (b) washing the coagulated fiber with an aqueous washing fluid for less than 72 hours under conditions such that the fiber contains no more than 8,000 ppm residual solvent acid (1 ppm=1 part per million, by weight); (c) drying the fiber at a temperature of no more than 300.degree. C. until it retains no more than about 2 weight percent residual moisture; and (d) heat-treating the fiber at a temperature of at least about 300.degree. C. under tension.
摘要翻译： 改进的聚苯并恶唑纤维通过用于整理含有聚苯并恶唑聚合物和溶剂酸的纺丝和拉伸纺丝纤维的方法制备，包括以下步骤：（a）在水性凝结剂中凝结掺杂纤维：（b）洗涤凝固纤维 在含有不超过8,000ppm的残余溶剂酸（1ppm = 1重量份/百万重量份）的条件下，使用含水洗涤液小于72小时。 （c）在不超过300℃的温度下干燥纤维，直到其保持不超过约2重量％的残余水分; 和（d）在张力下在至少约300℃的温度下热处理纤维。
-
公开(公告)号：US5411694A
公开(公告)日：1995-05-02
申请号：US154237
申请日：1993-11-18
CPC分类号： D01F6/74
摘要： Improved polybenzoxazole fibers are made by a process for finishing a spun and drawn dope fiber, which contains polybenzoxazole polymer and polyphosphoric acid, including the steps of:(a) coagulating the dope fiber in an aqueous coagulant;(b) washing the coagulated fiber with an aqueous washing fluid for less than 72 hours under conditions such that the fiber contains no more than 8,000 ppm residual phosphorus (1 ppm=1 part per million, by weight);(c) drying the fiber at a temperature of no more than 300.degree. C. until it retains no more than about 3 weight percent residual moisture; and(d) heat-treating the fiber at a temperature of at least about 300.degree. C. under tension.
摘要翻译： 改进的聚苯并恶唑纤维通过用于整理含有聚苯并恶唑聚合物和多磷酸的纺丝和拉伸纺丝纤维的方法制备，包括以下步骤：（a）将凝胶纤维凝结在含水凝结剂中; （b）在含有不超过8,000ppm的残余磷（1ppm = 1重量份/百万重量份）的条件下，用含水洗涤液洗涤凝固纤维少于72小时; （c）在不超过300℃的温度下干燥纤维，直到其保持不超过约3重量％的残余水分; 和（d）在张力下在至少约300℃的温度下热处理纤维。
-
3.发明授权Process for the preparation of polybenzoxazole and polybenzothiazole filaments and fibers 失效制备聚苯并恶唑和聚苯并噻唑长丝和纤维的方法
公开(公告)号：US5976447A
公开(公告)日：1999-11-02
申请号：US668784
申请日：1996-06-24
CPC分类号： D01F6/74
摘要： A continuous process for heating a polybenzazole or polybenzothiazole filament, which includes the step of heating the filament to a temperature of at least 100.degree. C. but no greater than 290.degree. C. while applying a tension thereto of at least 3.5 grams per denier, which is carried out at a line speed of at least 100 m/minute; and there is no prior or subsequent heating of the fiber to any temperature greater than 300.degree. C. It has been discovered that placing tension on the filament while it is dried increases its tensile modulus without a significant decrease in its tensile strength.
摘要翻译： 一种用于加热聚吲哚或聚苯并噻唑长丝的连续方法，其包括将长丝加热至至少100℃但不高于290℃的温度，同时向其施加至少3.5克/旦尼尔的张力， 其以至少100m /分钟的线速度进行; 并且没有将纤维预先或随后加热到大于300℃的任何温度。已经发现在干燥时在丝上张力增加了其拉伸模量而不显着降低拉伸强度。
-
公开(公告)号：US5294390A
公开(公告)日：1994-03-15
申请号：US985078
申请日：1992-12-03
申请人： Steven Rosenberg , George J. Quarderer, Jr. , Ashish Sen , Masaru Nakagawa , Timothy L. Faley , Myrna Serrano , Yoshihiko Teramoto , Chieh-Chun Chau
发明人： Steven Rosenberg , George J. Quarderer, Jr. , Ashish Sen , Masaru Nakagawa , Timothy L. Faley , Myrna Serrano , Yoshihiko Teramoto , Chieh-Chun Chau
CPC分类号： D01F6/74
摘要： Polybenzazole polymer dopes are spun through a spinneret having more than 2 per cm.sup.2, of orifices in relatively close proximity. The dope filaments formed, then pass through an air gap which has a temperature of 50.degree. to 100.degree. C. and a gas flow sufficient to uniformly reduce the temperature of the dope filaments. The filaments cool in the air gap and are then coagulated.
摘要翻译： 聚苯并恶唑聚合物掺合物通过喷丝板纺丝，每个喷丝头的平均孔数在每厘米2以上，孔口相对靠近。 所形成的涂料长丝然后通过温度为50摄氏度至100摄氏度的气隙和足以均匀降低涂料丝的温度的气流。 细丝在气隙中冷却，然后凝结。
-
公开(公告)号：US5296185A
公开(公告)日：1994-03-22
申请号：US985079
申请日：1992-12-03
申请人： Chieh-Chun Chau , Timothy L. Faley , Michael E. Mills , Masaru Nakagawa , Timothy J. Rehg , Myrna Serrano , Ravi Shanker , George J. Quarderer, Jr. , Yoshihiko Teramoto
发明人： Chieh-Chun Chau , Timothy L. Faley , Michael E. Mills , Masaru Nakagawa , Timothy J. Rehg , Myrna Serrano , Ravi Shanker , George J. Quarderer, Jr. , Yoshihiko Teramoto
摘要： Polybenzazole polymer dopes are spun into fibers at high speed by passing through a spinneret with proper selection of hole geometry, followed by spin-drawing to a spin-draw ratio of at least 20, washing, taking up and drying. The take up speed is at least about 150 meters per minute, and the fibers are spun in at least 10 km lengths without a break.
摘要翻译： 通过通过喷丝头适当选择孔几何形状，将聚吲哚聚合物掺杂物高速纺成纤维，然后旋转拉伸至至少20的纺丝拉伸比，洗涤，卷取和干燥。 吸收速度至少为每分钟约150米，纤维长度至少10公里，不间断地旋转。
-
公开(公告)号：US5534205A
公开(公告)日：1996-07-09
申请号：US286297
申请日：1994-08-05
摘要： In a process for preparing polybenzoxazole or polybenzothiazole filaments by extruding a polybenzoxazole or polybenzothiazole dope, drawing the dope filament across an air gap, and coagulating the dope filament; the number of filament breaks can be reduced by placing a stress isolation device after extruding but before coagulating the filament.
摘要翻译： 在通过挤出聚苯并恶唑或聚苯并噻唑涂料制备聚苯并恶唑或聚苯并噻唑长丝的方法中，将纺丝原液丝穿过空气间隙并凝结掺杂丝; 通过在挤出之后但在凝固丝之前放置应力隔离装置可以减少长丝断裂的数量。
-
公开(公告)号：US5756031A
公开(公告)日：1998-05-26
申请号：US793038
申请日：1997-01-30
摘要： A process for the preparation of polybenzazole filaments which comprises (a) extruding a solution of polybenzazole polymer in a mineral acid through a spinneret having at least 100 holes, which are arranged to form a annular pattern around the center of the spinneret, the center and at least two radial sections of the spinneret having no holes and an average width which is at least about 3 times the minimum pitch of the holes, thereby forming filaments of the polymer solution; (b) drawing the filaments of the polymer solution through a quench chamber while providing a substantially radial gas flow therein across the spinneret from at least two different directions; and (c) washing and drying the filaments of the polymer solution under conditions sufficient to form polybenzazole filaments.
摘要翻译： PCT No.PCT / US95 / 10271 Sec。 371日期1997年1月30日 102（e）日期1997年1月30日PCT提交1995年8月10日PCT公布。 WO96 / 05341 PCT出版物 日期1996年2月22日一种制备聚吲唑长丝的方法，其包括（a）通过具有至少100个孔的喷丝头挤出无机酸中的聚苯并唑聚合物溶液，所述喷丝头被布置成围绕 喷丝头，中心和喷丝头的至少两个径向部分没有孔，平均宽度为孔的最小间距的至少约3倍，从而形成聚合物溶液的长丝; （b）将聚合物溶液的长丝拉过淬火室，同时从至少两个不同的方向穿过喷丝头提供基本上径向的气流; 和（c）在足以形成聚吲哚长丝的条件下洗涤和干燥聚合物溶液的长丝。
-
8.发明授权Method for stable rapid spinning of a polybenzoxazole or polybenzothiazole fiber 失效稳定快速纺丝聚苯并恶唑或聚苯并噻唑纤维的方法
公开(公告)号：US5385702A
公开(公告)日：1995-01-31
申请号：US207989
申请日：1994-03-08
CPC分类号： D01F6/74
摘要： Polybenzoxazole or polybenzothiazole polymer dopes are spun through a spinneret having an orifice density of more than 0.25 per cm.sup.2 to form filaments. The filaments formed then pass through an air gap which has a gas flowing into it at a temperature of between about 5.degree. C. to about 100.degree. C. and at a flow rate between about 0.1 meters/second and about 2.0 meters/second. The filaments cool in the air gap and are then coagulated. During or after coagulation the filaments are combined into one or more fibers. By this method of controlling the temperature in the air gap it is possible to stably spin polybenzoxazole or polybenzothiazole fibers at relatively high final line speeds.
摘要翻译： 聚苯并恶唑或聚苯并噻唑聚合物掺杂物通过孔密度大于0.25 / cm2的喷丝头纺丝以形成长丝。 所形成的长丝然后通过气流，气隙在大约5℃至大约100℃的温度和约0.1米/秒到约2.0米/秒之间的流速下流入其中。 细丝在气隙中冷却，然后凝结。 在凝结期间或之后，将细丝组合成一根或多根纤维。 通过这种控制气隙温度的方法，可以以相对较高的最终线速度稳定地旋转聚苯并恶唑或聚苯并噻唑纤维。
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.018 秒)
