公开(公告)号：US5061425A

公开(公告)日：1991-10-29

申请号：US404294

申请日：1989-09-07

申请人： Masayoshi Ito ,  Ming-Ya Tang ,  Soojaa L. Kim

发明人： Masayoshi Ito ,  Ming-Ya Tang ,  Soojaa L. Kim

IPC分类号： D01F6/62

CPC分类号： D01F6/62

摘要： A process for producing a high modulus, high tenacity polyethylene terephthalate filament which comprises (1) spinning a solution of polyethylene terephthalate in an organic solvent through a die to produce a solution spun filament, wherein the polyethylene terephthalate has an intrinsic viscosity of at least about 1.0 dl/g and wherein the organic solvent is selected from the group consisting of (a) hexafluoroisopropanol, (b) trifluoroacetic acid, (c) mixed solvent systems containing from about 20 weight percent to about 99 weight percent hexafluoroisopropanol and from about 1 weight percent to about 80 weight percent dichloromethane, and (d) mixed solvent systems containing from about 20 weight percent to about 99 weight percent trifluoroacetic acid and from about 1 to about 80 weight percent dichloromethane; and (2) subsequently drawing the solution spun filament to a total draw ratio of at least about 7:1 to product the high modulus, high tenacity polyethylene terephthalate filament.

摘要翻译： 一种制备高模量，高韧性聚对苯二甲酸乙二醇酯长丝的方法，其包括（1）通过模头将聚对苯二甲酸乙二醇酯在有机溶剂中的溶液旋转以产生溶液纺丝丝，其中聚对苯二甲酸乙二醇酯的特性粘度至少约为 1.0dl / g，其中有机溶剂选自（a）六氟异丙醇，（b）三氟乙酸，（c）含有约20重量％至约99重量％六氟异丙醇和约1重量％的混合溶剂体系 百分比至约80重量％的二氯甲烷，和（d）含有约20重量％至约99重量％的三氟乙酸和约1至约80重量％的二氯甲烷的混合溶剂体系; 和（2）随后将溶液纺丝丝拉伸至至少约7:1的总拉伸比，以产生高模量，高强度聚对苯二甲酸乙二醇酯长丝。

公开(公告)号：US4968471A

公开(公告)日：1990-11-06

申请号：US242589

申请日：1988-09-12

申请人： Masayoshi Ito ,  Ming-Ya Tang ,  Soojaa L. Kim

发明人： Masayoshi Ito ,  Ming-Ya Tang ,  Soojaa L. Kim

IPC分类号： D01F6/62

CPC分类号： D01F6/62

摘要： This invention discloses a process for producing a high modulus, high tenacity polyethylene terephthalate filament which comprises (1) spinning a solution of polyethylene terephthalate in an organic solvent through a die to produce a solution spun filament, wherein the polyethylene terephthalate has an intrinsic viscosity of at least about 3.0 dl/g and wherein the organic solvent is selected form the group consisting of (a) hexafluoroisopropanol, (b) trifluoroacetic acid, (c) mixed solvent systems containing from about 20 weight percent to about 99 weight percent hexafluoroisopropanol and from about 1 weight percent to about 80 weight percent dichloromethane, and (d) mixed solvent systems containing from about 20 weight percent to about 99 weight percent trifluoroacetic acid and from about 1 to about 80 weight percent dichloromethane; and (2) subsequently drawing the solution spun filament to a total draw ratio of at least about 7:1 to produce the high modulus, high tenacity polyethylene terephthalate filament. The filaments made by the process of this invention have better thermal stability, such as a lower thermal shrinkage and a higher melting point, than fibers made utilizing standard melt processing techniques.

公开(公告)号：US3950282A

公开(公告)日：1976-04-13

申请号：US530349

申请日：1974-12-06

申请人： Richard D. Gilbert ,  Vivian T. Stannett ,  Soojaa L. Kim

发明人： Richard D. Gilbert ,  Vivian T. Stannett ,  Soojaa L. Kim

IPC分类号： C08B15/00 ,  C08B15/06 ,  C08G18/64 ,  C08L1/02

CPC分类号： C08B15/06 ,  C08B15/005 ,  C08G18/6484 ,  C08G2230/00 ,  Y10S260/43

摘要： The biodegradable polymer having the formula:W--M--Zwherein M is a polyanhydroglucose block which does not contain any ester substituents and wherein W and Z are organic diisocyanates having the formula: ##EQU1## or ##EQU2## wherein R is an divalent organic radical and wherein X is a terminal group, --M--Z, --M--W or --M. The process of preparing the biodegradable polymer wherein M contains at least one ester substituted hydroxyl group which comprises deesterifying M to obtain M as a polyanhydroglucose block which does not contain any ester substituents.