二醋酯长丝及其变形丝和织物的性能特点

在烟用二醋酸纤维丝束小试设备上,采用不同纺丝工艺参数,纺制了5个二醋酯长丝样品,对二醋酯长丝及其空气变形丝和织物的性能进行测试分析。发现:二醋酯长丝强度偏低,变形、织造等后加工技术要求较高;二醋酯长丝空变纱在小负荷下的卷曲稳定性较好,而在重负荷下的丝圈稳定性不理想;二醋酯长丝织物的拉伸强力和撕裂强力均较低,耐磨性能较差,但色牢度远远优于粘胶长丝织物。     

产业化醋酯长丝纺丝生产技术

通过对醋酯长丝生产技术及装备的产业化开发,研究了影响醋酯长丝生产及产品品质的主要因素及调控措施,在产业化生产线上生产出了符合服装面料要求的醋酯长丝。     

醋酯纤维工业的现状和产品开发

概述了国内外醋酯纤维工业的发展现状及产品开发情况 ,对我国建立醋酯长丝生产线提出了建议。     

不断进步中的醋酯纤维技术与市场

简要介绍了醋酯纤维的特点及近年来醋酯纤维技术的新进展,指出基于国内烟用醋酯丝束市场供需已趋于平衡的现实,开发高档服装用醋酯长丝产品具有可行性.     

2011年世界醋酯纤维的生产

据美国《Fiber Organon））统计,2011年的世界醋酯纤维产量为86．42万吨,比上年减少0．06％。其中,纺织用醋酯长丝4．92万吨、烟嘴用醋酯丝束81．5万吨。     

塞拉尼斯欧美醋酯公司从长丝撤退

塞拉尼斯欧美醋酯LLC公司计划从醋酯纤维长丝撤出。该公司醋酯事业大幅度再组建的理由是：事业的效率化,过剩设备削减,按长期的观点向着有效益的事业靠拢已经完成。     

巴基斯坦的合成纤维工业

<正> 巴基斯坦自1964年第一家醋酯长丝工厂建成而开始有了合成纤维工业。此后建成了若干规模很小的尼龙长丝厂,但和醋酯丝的情况一样,尼龙从来未打入巴基斯坦的纺织工业。聚酯也是从生产长丝开始,最初使用进口切片,大都用改装的尼龙设备生产。但到70年代初期,聚酯长丝和短纤维便相继成     

江苏东升集团建设醋酯长丝工厂

日本《海外速报》No.5 65报道 ,江苏省东升集团的 Aikeke技术有限公司为了适应国内需求的增加 ,计划建设 5 0 0 0 t/a的醋酯长丝工厂。该公司开展羊毛有关制品、土工布、润滑油关联产品 ,销售额 1 .6亿元 (约 1 90 0万美元 )。销售额的70 %以上为出口。江苏东升集团建设醋酯长丝工厂@王德诚     

本期广告索引

2006年Eastman Chemical Co．纤维部的销售额比2005年增加4．7％,为9．1亿美元。据CFI报道,公司从原料到纤维一贯制生产,用于香烟过滤的醋酯丝束以Eatron商标,醋酯长丝以Chromspun为商标进行生产。由于Celanese的撤退,公司成为北美唯一的醋酯纤维制造商。     

三菱人丝新织物

三菱人丝新开发了 2种女装织物 ,一种是“Ｍｏｄｅｌｅｔ”机织物 ,是三醋酯“Ｓｏａｌｏｎ”与特种聚酯长丝的复合 ,另一种是“Ｎａｌｉｓ”聚酯长丝机织物。“Ｍｏｄｅｌｅｔ”有蓬松性好 ,回弹性足 ,轮廓佳 ,凉爽、吸湿 /快干及易保养等特性。“Ｍｏｄｅｌｅｔ”由随机多层结构的丝生产 ,通过利用用于“Ｓｏａｌｏｎ”和特种弹性聚酯的空气长丝 -混合技术 ,将“Ｓｏａｌｏｎ”放在外围部分。材料构成是 70 %三醋酯 / 30 %聚酯。“Ｎａｌｉｓ”为休闲服用聚酯长丝机织物。除仿真丝光泽外 ,还表现两种矛盾感 :即柔和的沙沙声与光滑性。此外…     

二醋片和醋酸长丝的市场分析及前景展望

醋酸纤维是具有高附加值的纤维品种,具有与真丝相媲美的外观和舒适性.二醋片是生产烟用过滤嘴和醋酸长丝的主要原料.简单介绍了醋酸纤维的发展历史和应用,详细分析了二醋片、醋酸长丝的国内外生产现状、市场需求及发展预测,并对我国发展醋酸纤维工业提出了几点建议.     

Review of manufacturing of fiber composite components by filament winding

A summary of the simple to very complex fiber composite components that have been fabricated by automated filament winding is presented. The process of filament winding, where resin-impregnated, high strength, high modulus fibers are placed on a rotating mandrel (under controlled tension) in a specified geometric pattern, is then described in detail. A qualitative comparison of the filament winding of fiber composite components by conventional and robotic winding systems is presented next. The results indicate that a robotic winding system can be a viable alternative to conventional filament winding for certain applications. Finally, the concepts of lightweight winding systems, hybrid filament winding processes, and advanced filament winding techniques are presented.     

醋酸纤维素纤维干法纺丝成形模拟

建立了基于Maxwell粘弹性本构方程的干法纺丝动力学模型,对醋酸纤维素纤维干法纺丝过程进行了模拟,预测了纤维成形过程中丝条的溶剂浓度、温度、速度、张力等沿纺程的变化关系。结果表明:纤维固化成形发生在闪蒸结束后离喷丝口不远处,此后丝条溶剂含量变化很小;丝条温度在闪蒸时略低于热吹风温度,闪蒸结束后迅速上升到热吹风温度;丝条张力主要来源于空气的摩擦阻力和卷绕张力,在纺程下半段以摩擦阻力为主;提高泵供量后溶剂蒸发速率变慢,丝条温度达到热吹风温度所需时间变长,丝条固化点离喷丝头越远;闪蒸速率随纺丝液溶剂含量增高而减小,同时丝条温度升到甬道温度的时间也越长。     

Simulation of dry‐spinning process of polyimide fibers

As one type of high‐performance fibers, the polyimide fibers can be prepared from the precursor polyamic acid via dry‐spinning technology. Unlike the dry‐spinning process of cellulose acetate fiber or polyurethane fiber, thermal cyclization reaction of the precursor in spinline with high temperature results in the relative complex in the dry‐spinning process. However, the spinning process is considered as a steady state due to a slight degree of the imidization reaction from polyamic acid to polyimide, and therefore a one‐dimensional model based on White‐Metzer viscoelastic constitutive equation is adopted to simulate the formation of the fibers. The changes of solvent mass fraction, temperature, axial velocity, tensile stress, imidization degree, and glass transition temperature of the filament along the spinline were predicted. The effects of spinning parameters on glass transition temperature and imidization degree were thus discussed. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Simulation of polyimide fibers with trilobal cross section produced by dry‐spinning technology

As one type of high performance fibers, polyimide fibers can be prepared from polyamic acid (PAA) solution by dry‐spinning technology. The transformation from the precursor of polyamic acid to polyimides via thermal cyclization reaction in the dry‐spinning process is a main distinguishing feature, which is very different from other fibers produced by dry‐spinning such as cellulose acetate fiber and polyurethane fiber. In this report, the dry‐spinning formation of polyimide fibers with trilobal cross section from PAA solution in N,N‐dimethylacetamide is simulated via a one‐dimensional model based on a viscoelastic constitutive equation, combined with profile degree equation of cross section and imidization kinetics equation. The glass transition temperature, imidization degree and profile degree of the filament along the spinline are predicted by the model, as well as relative parameters such as solvent mass fraction and temperature. As a simulated result, solidification of polyimide fibers take place about 150 cm from the spinneret which is farther than for cellulose acetate fiber (70 cm). Moreover, the final profile degree of fiber is affected by many spinning parameters, such as spinning temperature, surface tension, spinning solution concentration, major, and minor axis length of the spinneret hole. POLYM. ENG. SCI., 55:2148–2155, 2015. © 2015 Society of Plastics Engineers     

环保水容器缠绕壳体用低成本UPR研究

本文研究了环保水处理容器缠绕壳体用基体低成本不饱和聚酯树脂配方，重点阐述了不饱和聚酯凝胶期控制、表干、引发剂用量、树脂选择及增韧方法和纤维缠绕复合层的力学性能。结果表明，该树脂基体价格低、韧性高，与玻璃纤维界面粘结好，所制的复合材料壳体纤维强度转化率较高。     

国内锦纶新产品开发应用

介绍了国内粗旦和细旦锦纶长丝，高强及异形截面锦纶长丝，锦纶６与锦纶６６共混短纤维，ＰＥＴ／ＰＡ６复合纤维，粗旦短纤维、帘子线、ＢＣＦ及单丝等新产品的开发情况，指出锦纶生产必须向差别化、多功能、高附加值方向发展。     

Improved longitudinal compression performance of a unidirectional fiber‐reinforced composite with a filament covering

A filament covering is proposed to improve the longitudinal compressive properties of unidirectional fiber reinforced plastic. Based on compressive buckling theory, fiber buckling can be prevented by shortening the buckling critical wavelength by covering the filament. In this paper, a UHMWPE fiber bundle and a PBO filament were selected as the reinforcing fiber and the covering filament, respectively, to verify this statement. The effect of a covering PBO filament on a UHMWPE fiber reinforced epoxy resin on compressive performance was investigated by a compressive test and morphology observations. Results show that the filament covering has positive effect on the compressive strength of the FRP, and the tension‐exerted filament covering increased the compressive strength and increased the longitudinal compressive modulus of the UFRP. POLYM. COMPOS., 37:3127–3133, 2016. © 2015 Society of Plastics Engineers     

拉伸与热定型对聚苯硫醚长丝结构性能的影响

以国产聚苯硫醚(PPS)树脂为原料,用熔融法纺丝制得PPS长丝。采用差示扫描量热仪、热重分析仪研究了后处理对纤维结晶和热性能的影响;利用声速取向测量仪研究了拉伸对纤维取向的影响;用单纱电子强力仪测量了纤维力学性能。结果表明:热拉伸倍数增大,PPS纤维取向度、结晶度增加,纤维的断裂强度增加,断裂伸长减小;拉伸倍数大于5,会出现较多毛丝和断头;控制热拉伸温度85～105℃,热定型温度100℃以上;纤维的结晶主要在热拉伸过程中基本完成,热定型进一步完善结晶结构;高温下氧气的存在,会使PPS纤维发生严重的氧化降解。