海岛丝织物碱减量升温工艺的制定和减量过程预测

探讨了在简单实验的基础上绘制碱减量曲线，并由此合理制定减量升温工艺以及预测碱减量程度的方法和原理。经实验验证其具有可行性和有效性。     

聚丙烯盆底补片的热定型工艺与性能

选用直径为0.1mm的医用聚丙烯单丝,由经编编织制备了盆底补片,探讨了热定型温度和时间对盆底补片的基本参数(厚度、面密度、孔隙率)和力学性能(顶破强力、拉伸断裂强力、缝线拉脱强力和弯曲刚度)的影响规律.试验结果表明:在热定型张力一定的情况下,热定型温度和时间对盆底补片的基本参数影响较小,热定型温度对盆底补片的力学性能影响较大;在相同热定型时间条件下,随着热定型温度的升高,盆底补片的断裂强力、顶破强力、拉脱强力下降,但横向刚柔性好;该盆底补片的热定型优选工艺参数为温度130℃、时间15min.     

Lyocell长丝热定型工艺对其结构性能的影响

针对Lyocell长丝热定型工艺尚不明确的问题,采用干喷湿纺技术制备Lyocell水洗丝,研究热定型张力、温度和时间等工艺参数对Lyocell长丝力学性能和尺寸稳定性的影响,并结合广角X射线衍射、小角X射线散射以及双折射率等测试分析了不同条件下长丝结晶、取向以及微孔等结构的变化规律,阐明了热定型条件下长丝结构与性能的关系。结果表明：温度为110～130℃时,3 min的热定型可保证长丝中水分的去除,在热定型过程中长丝的晶区结构基本不变,微孔尺寸的减小以及非晶区纤维素分子链段的收缩,提高了长丝的致密化程度并降低了取向程度;施加0.5～2.3 cN/dtex的张力,长丝的断裂强度、初始模量不易发生弱化,且干热收缩率低于0.7%。施加适当张力的热定型有效抑制了非晶区链段的解取向,保持了纤维高结晶、高取向的结构特点,从而保证了Lyocell长丝的力学性能和尺寸稳定性。     

基于多目标遗传算法的热定型工艺参数优化设计

为了解决染整后整理中热定型工艺参数难以定量设计的关键技术难题,将工艺参数优化设计问题视为以成品门幅、克重与客户要求的相应值的绝对误差最小为目标函数,温度、车速、超喂率和上机门幅为优化变量,以根据实际情况中各优化变量的取值范围为约束条件的多目标优化问题。建立多目标优化模型,并基于该模型采用多目标遗传算法,实现了热定型参数精确定量设计。用该方法得到的工艺参数加工弹力布,生产成品的克重、门幅与用户要求指标的偏差小于1%,完全可以满足实际生产要求。     

一种涤纶异收缩丝的新产品开发与生产工艺

采用新型异涤纶异收缩丝生产出了一种具有较好仿毛性能的新产品．并对利用涤纶异收缩丝进行新产品开发的途径和生产加工的工艺条件进行了探讨．     

服装用聚四氟乙烯共同拉伸复合膜的热定型机理

用聚四氟乙烯与热塑性聚氨酯制备了3种不同热定型温度下的服装用聚四氟乙烯共同拉伸膜,提出了基于聚四氟乙烯微粒熔融的共同拉伸膜热定型模型,并阐明了热定型温度对共同拉伸膜形态结构、弹性回复性和透湿性等的影响.经280℃热定型的共同拉伸膜,弹性回复率为66%,透湿量达9 655g/d·m2,可以满足服装变形舒适性与透湿舒适性的要求.     

服用聚四氟乙烯共同拉伸膜的热定型机理

用聚四氟乙烯与热塑性聚氨酯制备了3种不同热定型温度下的服装用聚四氟乙烯共同拉伸膜,提出了基于聚四氟乙烯微粒熔融的共同拉伸膜热定型模型,并阐明了热定型温度对共同拉伸膜形态结构、弹性回复性和透湿性等的影响。经280℃热定型的共同拉伸膜,弹性回复率为66%,透湿量达9 655(g/24 h.m2),可以满足服装变形舒适性与透湿舒适性的要求。     

海岛纤维结构形态与染色性能的研究

通过色差仪、DSC、结晶速度测量、显微图像分析以及动态机械热分析研究了四种海岛纤维的结晶度、结晶速度、晶粒大小、玻璃化温度与染色性能的关系.结果表明:结晶度小,结晶速度慢,晶粒尺寸大,玻璃化温度低等等均有利于纤维染色性能的提高.     

针织物热定型质量因素的团树传播

首先,通过研究针织物热定型过程的生产流程、机械构造,采集生产过程质量数据、工艺数据和设备状态,并分析质量数据异常的原因.然后,通过相关分析确定对热定型克质量有影响的各环节及其对应变量,建立质量因素分析拓扑结构.最后,将各变量纳入具有因果关联的网络结构中,采用基于团树传播算法的贝叶斯推理规则,利用团树间的信息传递计算出各变量对克质量的影响程度.结合某企业实例进行分析,结果表明:文中方法可实现热定型质量指标影响因素的精确定量分析.     

网片热定型参数的探讨

合成纤维以其强度大、抗腐、耐磨、吸水量小等优点,取代了植物纤维,作为网渔具的主要原料。但合成纤维也存在着一定的缺点,如纤维的伸专度大、抱合力差,制成网片的结节容易滑移,致使网具变形,影响扑捞效果。目前网厂和渔业公司,均采用热处理定型工艺,以使结节牢固。关于热定型的各项参数,各生产单位虽都大同小异,但大部份均系经验数据。本文通过网片结节牢度的实际测试,得出比较理想的定型数据。     

大豆蛋白纤维针织物碱/变性浴染色工艺研究

利用科华素三原色系列活性染料对大豆纤维染色性能进行了系统实验,旨在探索大豆纤维碱性浴和变性浴染色的基本染色规律。实验结果表明,乙烯砜/一氯均三嗪双活性基活性染料对大豆纤维的碱性浴理想染色温度为60℃,中色染色的纯碱用量为5～6g／L。乙烯砜/一氯均三嗪双活性基活性染料较佳的酸性浴染色pH值为3～4,续染时间为40min。对大豆蛋白纤维采用活性染料变性浴的染色方法,可以达到良好的效果。     

仿棉聚酯纤维针织物的起毛起球性能

以仿棉聚酯纤维纯纺纱、纯棉纱及4种不同混纺比的仿棉聚酯纤维与棉的混纺纱为原料,织成双罗纹针织物,对试样织物的起毛起球性能进行了对比,分析了纤维性能、纱线性能等因素对试样织物起毛起球性能的影响,以此探讨仿棉聚酯纤维针织物的起毛起球性能.结果表明:仿棉聚酯纤维针织物的抗起毛起球性能在一定程度上得到了改善,起毛起球等级与纯棉针织物相近.     

Study on the Properties of Newdal Blended Knitted Fabrics

The basic properties of the 3 knitted fabrics are measured with different instruments.Testing standards are tensile,break drape,wear resistance,pilling property and bending properties.By the analysis of the results,the following conclusions can be deduced: Among the 3 fabrics,the mechanical properties of the blended knitted fabrics Newdal /Polyester is the best.     

Effect of Heat-Setting on Structural Parameters and Mechanical Properties of PP Monofilament Hernia Patch

General surgery hernia is a common and frequently- occurring disease in the world. In the tension-free hernia repair surgery, polypropylene （PP） patch has been confirmed as the most popular surgical implants. In this study, domestic medical PP monofilament was selected as raw material whose diameter was 0.15 mm, and the patch was knitted in the warp knitting machine of 12E gauge with one bar. Using the method of orthogonal experiment with three factors and three levels, the best heat-setting process of PP mesh was determined at the temperature of 130 ~C with 10 min under tension-free conditions. The relationship between heat-setting tension and performance of the patch was discussed. Patches with different porosity were prepared, and then structural parameters including density, thickness, porosity, and mechanical properties including tensile breaking strength, bursting strength, tearing strength, flexural rigidity and suture pulling out strength were tested and compared. The experimental results show that： the smaller of the patch＇s density, the higher of the porosity; other properties including density, thickness, bending stiffness, tensile breaking strength, bursting strength, tear strength, and suture pulling out strength reduce in varying degrees. This different degree of reduction is worth summarizing.     

Wet Permeability and Moisture Vapor Transmission Characteristics of Soybean Knitted Fabrics

Wet permeability of fibrous assembly is mainly influenced by the properties of liquid and the configurations of the fiber which consist of diameter of fiber, twist angle and fiber alignment in a yarn. It can be seen from experimental results that the knitted fabric made of soybean (SB) fiber has good properties both in wet permeability and vapor transmission so that the knitting technology and fabric characteristics can be improved.     

Characterization of Deformations of Multiaxial Warp Knitted Fabrics during Forming Process

The typical structure(with four inserting yarn systems) of multi-axial warp knitted fabrics shows unsatisfactory conformability according to hemisphere pressing experi-ments.The structure containing only two bias inserting yarn systems(TBMWK fabric),however,proves to possess good conformability.This paper characterized in detail the forming behavior of TBMWK fabric.It was found that the two bias inserting yarn systems tend to gather always along the weft direction,and the angles between them along this direction are basically linear to the perpendicular distances from the measured points to the longitudinal axis of the hemisphere.And the     

牛奶纤维／棉混纺针织物的漂白工艺

研究了双氧水质量浓度、碳酸钠质量浓度、硅酸钠质量浓度、尿素质量浓度、渗透剂质量浓度、时间、温度、浴比等因素对牛奶纤维/棉混纺针织物漂白效果的影响.根据正交实验得出较优的牛奶纤维/棉混纺针织物漂白工艺:双氧水质量浓度25g/L,碳酸钠质量浓度4g/L,渗透剂JFC质量浓度2g/L,硅酸钠质量浓度4g/L,尿素质量浓度7g/L,浴比1∶20,时间60min,温度90℃.实验结果同时表明弱碱环境下,牛奶纤维/棉混纺针织物过氧化尿素氧漂的效果优于过氧化氢氧漂的效果.     

Study on Runs of Knitted Fabrics

The mechanism of runs propagation of plain weft-knit-ted fabric is analyzed theoretically.The relevant physicalmodel,the mathematical equation and the new methodto test the run force are presented accordingly,and themeasured results are described also.The run theory hasbeen proved correct in practice,a means to improve runresist of knit is also recommended.