二甲基亚砜法聚丙烯腈原丝干湿纺与湿纺成形工艺的比较

对二甲基亚砜(DMSO)法聚丙烯腈(PAN)原丝干湿纺和湿纺成形工艺进行比较,得出两种不同的成形工艺对PAN原丝表面光洁性和横截面形状的影响。实验表明:干湿纺成形纤维表面光洁,湿纺成形纤维表面凹凸有沟槽;不同的凝固浴浓度条件下,湿纺纤维横截面从圆形到非圆形再到圆形变化,干湿纺纤维横截面从圆形到非圆形变化。     

聚丙烯腈中空纤维膜的研究

本文对聚丙烯腈中空纤维膜的原料组成，中空纤维的纺丝工艺与膜性能的关系，以及纺制不同结构中空纤维膜的纺丝工艺和方法进行了综述，提出了纺制耐热性好的聚丙烯腈中空纤维３膜可能的方法和意义。     

优化纺丝工艺 提高纺丝速度

通过对纺丝温度和纤维拉伸比等工艺条件的调整试验 ,研究纤维结构变化对成品物理指标和可纺性的影响。详细介绍了提高FDY纺丝速度所进行的工艺改进 ,并从理论上解释了工艺变更的理由     

电纺法制备聚丙烯腈基纳米碳纤维

用电纺法制备了聚丙烯腈（PAN）纳米纤维，用场发射扫描电镜（FESEM）对其形态进行了研究，讨论了不同工艺参数对纤维直径和分散形态的影响。结果发现，纤维直径随着浓度的增加而增大，随着电压升高而减小，接收距离和溶剂类型对纤维直径的影响不大。将形态最好的纤维在240℃下进行活化处理，然后将活化处理过的纤维在氮气氛中煅烧，用FESEM观察了煅烧的纤维直径及形态的变化，红外（IR）分析了纤维化学结构的变化，证实了经900℃煅烧后的纤维为碳纳米纤维。     

共混熔纺抗菌中空纤维纺丝工艺探讨

探讨了添加抗菌母粒与切片共混熔纺制取抗菌中空纤维的生产工艺 ,并从三维卷曲中空涤纶短纤维生产工艺的共性出发 ,指出了影响抗菌中空纤维纺丝成形及成品指标的技术关键 ,着重阐述了生产抗菌中空纤维的纺丝工艺     

大豆蛋白纤维的纺制及其应用

介绍了大豆蛋白纤维的纺丝工艺，纤维性能及用途。     

熔融复合纺丝技术的国产化

<正> 一 概述 复合纤维是差别化纤维的一个大类。近年来,为了丰富人民衣着的花色品种,从开发化纤原料着手将发展差别化纤维。为此,需研究各类复合纺丝工艺,开发以复合纤维为原料的具有附加价值的中、高档纺织品。 我国自七十年代初涤纶、尼龙、丙纶纤维逐渐形成生产规模,为开发熔纺复合纤维奠定了基础。复合纤维以其品种繁多而著称,     

熔体直纺侧吹风空调机组的选择

由于涤纶长丝熔体直纺工艺中缺少干燥工艺环节 ,与纺丝工艺、产品质量密切相关的配套设备———侧吹风空调机组越加引为重视。熔体直纺的送风特点为 :纺丝生产线长 ,单台空调机组带纺丝位数多 (最多纺丝位 72位 /线 ) ;送风量大 (最大单台机组送风量为 5 .5× 1 0 5 万m3/h) ;管道损失大 ,送风压力高 ,受占地面积限制 ,机组多为复合式机组。因此直纺项目投资企业除对侧吹风送风温度、湿度、压力、洁净度等作基本要求外 ,并对侧吹空调机组的送风工艺设计 ,机组内在质量 ,机组配套件选型 ,纺丝卷绕间送风系统压差控制 ,环境风与侧吹风切换 ,多…     

干-喷湿纺聚丙烯腈纤维拉伸工艺研究

研究了干 -喷湿纺聚丙烯腈 (PAN)初生纤维的喷丝头拉伸比和三级拉伸 (空气拉伸、DMF浴拉伸、热水和沸水拉伸、干热拉伸 )工艺中各拉伸比对纤维性能的影响。结果表明 :提高喷丝头拉伸比可明显地降低初生纤维的线密度 ,提高强度 ;三级拉伸工艺中各拉伸比的提高均有利于PAN纤维线密度的减小及其强度、声速取向度和抗张模量的提高 ;合理调配三级拉伸中各拉伸比可制得强度超过 7.0cN/dtex的PAN纤维     

有光涤纶FDY狭缝挤出成型生产技术研究

介绍了以超有光聚酯切片为原料，采用熔体狭缝挤出成型技术和高速纺丝牵伸一步法工艺制取异形PET纤维的生产方法。重点讨论了喷丝板微孔孔形及纺丝工艺条件对初生纤维成型的影响。试验结果表明,通过合理的微孔设计，在高速纺丝条件下，可制得理想的狭扁形涤纶长丝。     

正确认识与使用丙纶短程纺短纤维设备

叙述与讨论了丙纶短程纺短纤维设备的发展过程，单机与生产厂的经济规模，以低速多孔纺丝与高速吹风冷却为特征的工艺特点以及应用的灵活性。如卫生材料用细旦纤维、粗旦纤维、异形纤维、三维卷曲纤维以及生产涤纶、锦纶等纤维的可能性     

Computer‐aided mathematical modeling and numerical simulation and theoretical analysis of the polypropylene polymer air drawing in spunbonding nonwoven process

In this article, as a nonlinear mathematical problem, the air‐drawing model and the air jet flow field model of the polymer during spunbonding process are also presented, because the continuous filament fiber not always occurs in the spunbonding process, therefore, there exists the filament fiber breakage, the broken fibers occur in the flow field of spunbonding process is a two‐phase flow problem, we suggested a new model called the sphere–spring model that can best described the broken fibers movement features. At the same time, the air‐drawing model of the polypropylene polymer in a spunbonding process is presented and solved by introducing the numerical computation results of the air jet flow field of aerodynamic device. The model's predictions of the filament fiber diameters, crystallinities, and birefringences are coincided well with the experimental data. The effects of the processing parameters on the filament fiber diameter are discussed. A lower polymer throughput rate, lower quench air temperature, higher polymer melt initial temperature, higher air initial temperature, higher air initial speed, medium smaller venturi gap, higher air suction speed, higher quench air pressure, higher air suction speed, higher extrusion temperature, higher quench air pressure, higher cooling air temperature, and so on can all produce finer filament fiber. The results show great prospects for this research in the field of computer‐assisted design of spunbonding technology. POLYM. ENG. SCI., 54:481–492, 2014. © 2013 Society of Plastics Engineers     

高压环吹风空调机组能耗分析

根据Neumag公司涤纶短纤维高压环吹风工艺要求 ,对浙江大学空调机组在不同季节的能耗进行了计算 ,并与其它厂家空调机组的能耗进行了比较 ,证实所设计的空调机组能耗低于其它厂家空调机组能耗。     

32头环吹直纺技术探讨

结合32头环吹直纺的设备特点,对32头环吹直纺技术进行了探讨。结果表明:32头环吹直纺技术节能高效,技术先进。在32头环吹直纺生产中,将纺丝温度及组件压力适当提高,采用适合环吹生产的喷丝板及冷却上油工艺,制定合理的拉伸卷绕工艺,有利于多孔超细旦纤维的生产。     

Experimental study and numerical simulation the air jet flow field of a dual slot sharp blunt die in the melt blowing nonwoven process

In this work, the physical model of a polymer in a melt blowing process is established and solved by introducing the numerical computation results of the air jet flow field of the dual slot sharp inset die. The influence of the melt blowing processing parameters and the die design parameters on the fiber diameter is also studied. A lower polymer throughput rate, higher polymer melt initial temperature, higher air initial temperature, higher air initial velocity, smaller angle between slot and axis of the spinneret, smaller width of the die head, and larger width of the slot can all produce finer fibers. At the same time, the air jet flow field model of the dual slot sharp inset die of polypropylene polymer nonwovens fabrics in melt blowing process was also established. The air jet flow field model was solved by using the finite difference method. The computational simulation results of the distributions of the z‐components of air temperature and air velocity along the spinline during melt blowing process are in accordance with the experimental data. The air drawing model of melt blowing process was simulated by means of the numerical simulation results of the air jet flow field. The predicted fiber diameter agree with the experimental data. The effects of the air initial velocity and air initial temperature on the fiber diameter were studied and discussed. The results demonstrate that a higher air initial velocity and a higher air initial temperature are beneficial to the air drawing of the polymer melt and thus to reduced fiber diameter. The results show the great potential of this research for computer assisted design in melt blowing nonwoven process and technology. POLYM. ENG. SCI., 57:417–423, 2017. © 2016 Society of Plastics Engineers     

玻璃纤维增强聚丙烯管材热熔焊焊接工艺研究

为了解决玻璃纤维增强聚丙烯管材在焊接过程中出现的气孔、错边和未熔合等缺陷,对玻璃纤维增强聚丙烯管材热熔焊焊接工艺进行了研究,为相关管道施工提供工程依据。     

83 dtex/146 f涤纶低弹网络丝生产工艺探讨

对83 dtex/146 f涤纶低弹网络丝开发生产过程中的工艺进行探讨。指出必须严格把关原料切片的品质,选择较高的纺丝温度,控制在288~292℃,采用较高的侧吹风温度和较低的风速,提高POY上油的均匀性,后加工过程中,选择合适的加工工艺,降低毛丝及断头的产生,在不影响成形的情况下,增大卷绕张力,增加硬度。     

Zinser涤纶牵伸丝工艺探析

通过对Ｚｉｎｓｅｒ牵伸机开车以来生产工艺的分析,阐述ＰＯＹ－ＤＴ主要工艺参数ＤＲ、牵伸速度、温度、压空压力、原丝等对ＤＴ丝物理指标的影响     

Computational fluid dynamics simulation and theoretical study the air jet flow field of a wide slot positive pressure drawing assembly in the spunbonding nonwoven process

The polymer air‐drawing model of polyethylene terephthalate spunbonding nonwovens and the air jet flow field model in wide slot positive pressure spunbonding process have been established. The influence of the density and the specific heat capacity of polymer melt at constant pressure changing with polymer temperature on the fiber diameter have been studied, which is solved by introducing the numerical computation results of the air jet flow field of attenuator. It is simulated by means of the finite difference method. The predicted fiber diameter agrees with the experimental data. The effects of the processing parameters on the fiber diameter with the help of the image analysis method have been investigated. A higher inlet pressure, smaller slot width, and smaller jet angle will all cause higher z‐axis position of air velocity and air pressure, which are beneficial to the air drawing of the polymer melt and thus to reducing the fiber diameter. The experimental results show that the agreement between the results and experimental data is better, which verifies the reliability of these models. The results present great prospects for this research in the field of computer assisted design of spunbonding process, technology, and equipment. POLYM. ENG. SCI., 55:231–242, 2015. © 2014 Society of Plastics Engineers     

Effects of processing parameters on the filament fiber diameter of spunbonded nonwoven fabrics

The air drawing model of polymer in spunbonding is established. The air drawing model of polypropylene polymer in spunbonding is confirmed by the experimental results obtained with the help of our university's equipment. The predicted filament fiber diameter is in accordance with the experimental data. The effects of the process parameters on the filament fiber are investigated in this article. It is found that a lower polymer throughput rate, a higher polymer melt temperature, a higher primary air temperature, a higher air suction speed, a higher quench pressure, a higher venturi gap can all yield finer fiber, whereas the effect of the web basis weight is not significant. The results show great prospects for this research in the field of computer assisted design of spunbonding technology. POLYM. ENG. SCI., 47:510–515, 2007. © 2007 Society of Plastics Engineers.