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1. 发明专利

JP2000096339A PRODUCTION OF HIGH-DENIER FILAMENT OF THERMOTROPIC LIQUID CRYSTAL POLYMER AND ITS COMPOSITION 失效
公开(公告)号：JP2000096339A
公开(公告)日：2000-04-04
申请号：JP25771499
申请日：1999-09-10
申请人： CELANESE ACETATE LLC
发明人： FLINT JOHN A , JAFFE MICHAEL J , HAIDER ISHAQ M , DIBIASE JOSEPH J , CORNETTA JOHN E
IPC分类号： D01F6/62 , D01D5/08 , D01F6/60 , D01F6/82 , D01F6/84 , D02J13/00
摘要： PROBLEM TO BE SOLVED: To produce the subject as-spun filament having a uniform molecular orientation over the whole cross section and capable of manifesting excellent mechanical and thermal characteristics by melt spinning a thermotropic liquid crystal polymer according to a specific method. SOLUTION: A thermotropic liquid crystal polymer is heated at a higher temperature than the melt transition temperature thereof by >=15 deg.C to provide a fluid stream, which is then passed through a heated extrusion chamber equipped with a cylindrical orifice having 1-15 aspect ratio of the length to diameter (L/D). A filament yarn is then taken up at a takeoff speed of at least about 200 m/min and about >=4 drawdown ratio (DD) (with the proviso that DD is at least 4 when the L/D is 0-2) to thereby produce the objective yarn having >=50 denier/filament denier, >=8 g/denier tenacity, >=450 g/denier modulus and >=2% elongation. Wholly aromatic polyesters, etc., are preferred as the above polymer.

2. 发明专利

JP2000110023A DIRECT HEAT TREATMENT OF HIGH-DENIER FILAMENT OF THERMOTROPIC LIQUID CRYSTAL POLYMER ON BOBBIN 失效
公开(公告)号：JP2000110023A
公开(公告)日：2000-04-18
申请号：JP25750699
申请日：1999-09-10
申请人： CELANESE ACETATE LLC
发明人： FLINT JOHN A , JAFFE MICHAEL , HAIDER ISHAQ M , DIBIASE JOSEPH J , CORNETTA JOHN E
IPC分类号： D01D5/084 , D01D10/02 , D01F6/60 , D01F6/62 , D01F6/82 , D01F6/84 , D02J13/00
摘要： PROBLEM TO BE SOLVED: To obtain a filament being uniformly orientated, having excellent mechanical characteristics, heat resistance and chemical resistance, useful for a safety clothing, etc., by spinning a thermotropic liquid crystal polymer under specific conditions and directly heat-treating the yarn on a bobbin. SOLUTION: A thermotropic liquid crystal polymer such as wholly aromatic polyester, etc., is heated to a temperature >=15 deg.C higher than its melt transition and formed into a fluid flow. The flow is passed through a cylindrical orifice having an aspect ration of length to diameter of 1-15 in a heated extrusion chamber, a filament is taken up under a low tension of >=5 g at >=200 m/minute take-off speed and >=4 drawdown ratio on a bobbin to give a filament having uniform molecule orientation in the whole cross section and a denier of >=50 denier/filament. Then the filament is directly heat-treated on a bobbin under temperature and pressure conditions for a sufficient time suitable for forming a heat-treated filament in the presence of an inert atmosphere to give the objective filament having 20 g/denier strength, 600 g/denier modulus and >=3% elongation.

3. 发明专利

JP2000096338A PRODUCTION OF HIGH-DENIER MULTILOBAL FILAMENT OF THERMOTROPIC LIQUID CRYSTAL POLYMER AND ITS COMPOSITION 失效
公开(公告)号：JP2000096338A
公开(公告)日：2000-04-04
申请号：JP25766199
申请日：1999-09-10
申请人： CELANESE ACETATE LLC
发明人： FLINT JOHN A , JAFFE MICHAEL , HAIDER ISHAQ M , DIBIASE JOSEPH J , CORNETTA JOHN E
IPC分类号： D01D5/253 , D01F6/60 , D01F6/62 , D01F6/82 , D01F6/84
摘要： PROBLEM TO BE SOLVED: To produce the subject filament having a uniform molecular orientation over the whole cross section and capable of manifesting high mechanical and heat resistances even in an as-spun state or in a heated state by melt spinning a thermotropic liquid crystal polymer according to a specific method. SOLUTION: A thermotropic liquid crystal polymer is heated at a higher temperature than the melt transition temperature thereof by >=15 deg.C to provide a fluid stream, which is then led and passed through a heated extrusion chamber equipped with an orifice having a multilobal cross section. Furthermore, a filament yarn is taken up at a takeoff speed of at least about 200 m/min and a proper drawdown ratio to thereby produce the objective yarn having >=50 denier/filament denier number, >=8 g/denier tenacity, >=450 g/denier modulus and >=2% elongation. A thermotropic wholly aromatic polyester or a thermotropic wholly aromatic polyesteramide is preferred as the above polymer.

4. 发明专利

BR9904637A 未知
公开(公告)号：BR9904637A
公开(公告)日：2000-09-05
申请号：BR9904637
申请日：1999-09-10
申请人： CELANESE ACETATE LLC
发明人： FLINT JOHN A , HAIDER M ISHAQ , JAFFE MICHAEL J , DIBIASE JOSEPH J , CORNETTA JOHN E
IPC分类号： D01D5/084 , D01D10/02 , D01F6/60 , D01F6/62 , D01F6/82 , D01F6/84 , D02J13/00
摘要： The present invention discloses and claims a novel process for the heat treatment of high denier filaments of a thermotropic liquid crystalline polymer. Preferred embodiments include process for the formation of heat treated filaments of a few wholly aromatic polyesters and polyesteramides. The process involves: (a) heating of a thermotropic liquid crystalline polymer to above its melting transition temperature; (b) passing said molten polymer through an extrusion chamber equipped with an extrusion capillary of an aspect ratio of greater than about 1 and less than about 15 to form a filament; (c) winding the filament on to a bobbin at a low tension and draw-down ratio of at least about 4; and (d) heat treating the filament directly on the bobbin at suitable temperature and pressure conditions for a sufficient period of time. The filaments so formed are of at least 50 denier per filament (dpf) and feature essentially uniform molecular orientation across the cross-section. The heat-treated filaments feature remarkably good tensile properties retaining at least 80 to 90 percent of the properties expected of conventional low denier (5 to 10 dpf) filaments.

5. 发明专利

TR9902156A2 未知
公开(公告)号：TR9902156A2
公开(公告)日：2000-04-21
申请号：TR9902156
申请日：1999-09-09
申请人： CELANESE ACETATE LLC
发明人： FLINT JOHN A , JAFFE MICHAEL J , HAIDER M ISHAQ , DIBASE JOSEPH J , CORNETTA JOHN E
IPC分类号： D01D5/084 , D01D10/02 , D01F6/60 , D01F6/62 , D01F6/82 , D01F6/84 , D02J13/00 , D02J
CPC分类号： D01F6/82 , D01D10/02 , D01F6/62 , D01F6/84

6. 发明专利

DE69920611T2 未知
公开(公告)号：DE69920611T2
公开(公告)日：2005-10-06
申请号：DE69920611
申请日：1999-07-23
申请人： CELANESE ACETATE LLC
发明人： FLINT JOHN A , JAFFE MICHAEL , HAIDER ISHAQ M , DIBIASE JOSEPH J , CORNETTA JOHN E
IPC分类号： D01D5/253 , D01F6/60 , D01F6/62 , D01F6/82 , D01F6/84
摘要： The present invention discloses and claims a novel process for the formation of high denier as-spun and heat-treated multilobal filaments of a thermotropic liquid crystalline polymer. Preferred embodiments include process for the formation of as-spun and heat treated octalobal monofilaments of a few wholly aromatic polyesters and polyesteramides. The process involves (a) heating of a thermotropic liquid crystalline polymer to above its melting transition temperature; (b) passing said molten polymer through an extrusion chamber equipped with an extrusion capillary having a multilobal cross-section to form a multilobal filament; and (c) winding the filament at a suitable draw-down. The filaments so formed are of at least 50 denier per filament (dpf) and feature essentially uniform molecular orientation across their cross-section. In a final optional step, the filaments are heat treated in stages to form filaments exhibiting excellent tensile properties. Both as-spun and heat-treated filaments feature remarkably good tensile properties comparable to those of round filaments. Most importantly, the multilobal filaments of this invention feature much superior adhesion properties than the conventional round filaments.

7. 发明专利

ES2235408T3 PROCEDIMIENTO DE TRATAMIENTO TERMICO DE FILAMENTOS DE ALTO DENIER DE POLIMEROS CRISTALINOS LIQUIDOS TERMOTROPOS DIRECTAMENTE EN LA BOBINA. 未知
公开(公告)号：ES2235408T3
公开(公告)日：2005-07-01
申请号：ES99114456
申请日：1999-07-23
申请人： CELANESE ACETATE LLC
发明人： FLINT JOHN A , JAFFE MICHAEL , HAIDER ISHAQ M , DIBIASE JOSEPH J , CORNETTA JOHN E
IPC分类号： D01D5/084 , D01D10/02 , D01F6/60 , D01F6/62 , D01F6/82 , D01F6/84 , D02J13/00
摘要： La invención presenta y reivindica un nuevo procedimiento para el tratamiento térmico de filamentos de alto denier de un polímero termotrópico cristalino líquido. Realizaciones preferidas incluyen un procedimiento para la formación de filamentos térmicamente tratados de unos cuantos poliésteres y poliésteramidos completamente aromáticos. El procedimiento comprende: a) el calentamiento del polímero termotrópico cristalino líquido hasta una temperatura superior a su temperatura de transición al estado fundido; b) el paso del polímero en estado fundido a través de una cámara de extrusión equipada con un capilar de extrusión con una relación dimensional superior a 1 e inferior a 15 para formar un filamento; c) el enrollado del filamento sobre una bobina a baja tensión y una relación de curva descendente de al menos 4; y d) el tratamiento térmico del filamento directamente sobre la bobina a temperatura y presión adecuadas y durante un período de tiempo suficiente. Los filamentos así formados sonde al menos 50 deniers por filamento (dpf) y poseen una orientación molecular básicamente uniforme a través de su sección de corte. Los filamentos térmicamente tratados obtienen unas propiedades tensionales remarcadamente buenas reteniendo al menos entre un 80 y un 90% de las propiedades que se esperan de los filamentos convencionales de bajo denier (entre 5 y 10 dpf).

8. 发明专利

DE69922754D1 未知
公开(公告)号：DE69922754D1
公开(公告)日：2005-01-27
申请号：DE69922754
申请日：1999-07-23
申请人： CELANESE ACETATE LLC
发明人： FLINT JOHN A , JAFFE MICHAEL , HAIDER ISHAQ M , DIBIASE JOSEPH J , CORNETTA JOHN E
IPC分类号： D01D5/084 , D01D10/02 , D01F6/60 , D01F6/62 , D01F6/82 , D01F6/84 , D02J13/00
摘要： The present invention discloses and claims a novel process for the heat treatment of high denier filaments of a thermotropic liquid crystalline polymer. Preferred embodiments include process for the formation of heat treated filaments of a few wholly aromatic polyesters and polyesteramides. The process involves: (a) heating of a thermotropic liquid crystalline polymer to above its melting transition temperature; (b) passing said molten polymer through an extrusion chamber equipped with an extrusion capillary of an aspect ratio of greater than about 1 and less than about 15 to form a filament; (c) winding the filament on to a bobbin at a low tension and draw-down ratio of at least about 4; and (d) heat treating the filament directly on the bobbin at suitable temperature and pressure conditions for a sufficient period of time. The filaments so formed are of at least 50 denier per filament (dpf) and feature essentially uniform molecular orientation across the cross-section. The heat-treated filaments feature remarkably good tensile properties retaining at least 80 to 90 percent of the properties expected of conventional low denier (5 to 10 dpf) filaments.

9. 发明专利

MY118225A PROCESS FOR MAKING HIGH DENIER MULTILOBAL FILAMENTS OF THERMOTROPIC LIQUID CRYSTALLINE POLYMERS AND COMPOSITIONS THEREOF 未知
公开(公告)号：MY118225A
公开(公告)日：2004-09-30
申请号：MYPI9903875
申请日：1999-09-08
申请人： CELANESE ACETATE LLC
发明人： FLINT JOHN A , JAFFE MICHAEL J , HAIDER M ISHAQ , DIBIASE JOSEPH J , CORNETTA JOHN E
IPC分类号： B32B27/34 , D01D5/253 , D01F6/60 , D01F6/62 , D01F6/82 , D01F6/84
摘要： THE PRESENT INVENTION DISCLOSES AND CLAIMS A NOVEL PROCESS FOR THE FORMATION OF HIGH DENIER AS-SPUN AND HEAT-TREATED MULTILOBAL FILAMENTS OF A THERMOTROPIC LIQUID CRYSTALLINE POLYMER. PREFERRED EMBODIMENTS INCLUDE PROCESS FOR THE FORMATION OF AS-SPUN AND HEAT TREATED OCTALOBAL MONOFILAMENTS OF A FEW WHOLLY AROMATIC POLYESTERS AND POLYESTERAMIDES. THE PROCESS INVOLVES (A) HEATING OF A THERMOTROPIC LIQUID CRYSTALLINE POLYMER TO ABOVE ITS MELTING TRANSITION TEMPERATURE; (B) PASSING SAID MOLTEN POLYMER THROUGH AN EXTRUSION CHAMBER EQUIPPED WITH AN EXTRUSION CAPILLARY HAVING A MULTILOBAL CROSS-SECTION TO FORM A MULTILOBAL FILAMENT; AND (C) WINDING THE FILAMENT AT A SUITABLE DRAW-DOWN. THE FILAMENTS SO FORMED ARE OF AT LEAST 50 DENIER PER FILAMENT (DPF) AND FEATURE ESSENTIALLY UNIFORM MOLECULAR ORIENTATION ACROSS THEIR CROSS-SECTION. IN A FINAL OPTIONAL STEP, THE FILAMENTS ARE HEAT TREATED IN STAGES TO FORM FILAMENTS EXHIBITING EXCELLENT TENSILE PROPERTIES. BOTH AS-SPUN AND HEAT-TREATED FILAMENTS FEATURE REMARKABLY GOOD TENSILE PROPERTIES COMPARABLE TO THOSE OF ROUND FILAMENTS.MOST IMPORTANTLY, THE MULTILOBAL FILAMENTS OF THIS INVENTION FEATURE MUCH SUPERIOR ADHESION PROPERTIES THAN THE CONVENTIONAL ROUND FILAMENTS.

10. 发明专利

BR9904126A 未知
公开(公告)号：BR9904126A
公开(公告)日：2000-10-03
申请号：BR9904126
申请日：1999-09-10
申请人： CELANESE ACETATE LLC
发明人： FLINT JOHN A , HAIDER M ISHAQ , JAFFE MICHAEL J , DIBIASE JOSEPH J , CORNETTA JOHN E
IPC分类号： D01F6/62 , D01D5/08 , D01F6/60 , D01F6/82 , D01F6/84 , D02J13/00
摘要： The present invention discloses and claims a novel process for the formation of high denier as-spun and heat-treated filaments of a thermotropic liquid crystalline polymer. Preferred embodiments include process for the formation of as-spun and heat treated monofilaments of a few wholly aromatic polyesters and polyesteramides. The process involves (a) heating of a thermotropic liquid crystalline polymer to above its melting transition temperature; (b) passing said molten polymer through an extrusion chamber equipped with an extrusion capillary of an aspect ratio of greater than about 1 and less than about 15 to form a filament; and (c) winding the filament at a draw-down ratio of at least about 4. The filaments so formed are of at least 50 denier per filament (dpf) and feature essentially uniform molecular orientation across the cross-section. In a final optional step, the filaments are heat treated in stages to form filaments exhibiting excellent tensile properties. Both as-spun and heat-treated filaments feature remarkably good tensile properties retaining at least 80 to 90 percent of the properties expected of conventional low denier (5 to 10 dpf) filaments.

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