兔毛等离子体变性处理的研究

本文通过对兔毛等离子体变性的研究,指出等离子体对免毛的变性效果只限于纤维的表面,而不改变纤维的内部结构。等离子体处理兔毛引起其表面性能变化的原因是由于表面极性基团增加的缘故。     

等离子体处理提高兔毛染色性的研究

兔毛纤维采用空气低温等离子体处理，使其形态结构和理化性能发生变化，从而提高兔毛纤维的染色性能，增加上色率及纤维抱合力，提高可纺性。     

100%纯兔毛织物

兔毛织物属中高档产品。由于它具有手感滑爽,轻柔美观和保暖性好等优点,深受消费者的喜爱。但市场上的兔毛织物,都是与羊毛等其它纤维混纺而制成的。这是因为兔毛纤维表面异常光滑,纤维之间的抱合力差,纯兔毛不但难纺成毛纱,成品穿着时也极易脱毛。     

等离子体改性兔毛纤维的探讨

为了改善兔毛纤维的性能,采用等离子体对兔毛进行改性.介绍了等离子体改性兔毛纤维的基本原理,比较了改性前后兔毛纤维的表面形态结构、摩擦系数、卷曲度和上染百分率.结果表明:等离子体改性能减少兔毛织物掉毛并提高兔毛纤维的上染百分率.     

兔毛纺织品防脱毛技术的研究

对兔毛纤维采用生物酶处理，使其形态结构发生改变，从而提高了兔毛纤维的表面摩擦系数，增加了纤维之间的抱舍力，提高了纤维的可纺性，改善了兔毛纺织品的脱毛现象．     

环境湿度对兔毛机械性能的影响

为了解湿度对兔毛纤维加工过程的影响 ,以便确定合理的加油水量及车间温湿度 ,采用不同含湿的兔毛纤维对其表面摩擦性能及纤维断裂强力进行了测试 ,发现随湿度的增加 ,兔毛纤维的断裂强力下降很多 ,而伸长增加则不明显 ;纤维表面摩擦系数随湿度的增加而增大     

兔毛织物开发看好

在我国,开发兔毛纤维织物具有得天独厚的条件和广阔前景,这是由有关行家经过调查研究后提出的看法。我国兔毛资源十分丰富,每年兔毛产量约为7000吨,占世界总产量的90％。我国的兔毛纤维长、白、轻、净,手感柔软,富有     

等离子体处理对芳砜纶相关性能的影响

为提高芳砜纶(polysulfonamide,PSA)纤维表面摩擦因数,改善其可纺性,用等离子体技术对其进行处理,测试不同时间、真空度处理前后纤维性能的变化.结果表明:常压下随处理时间的延长,纤维的断裂伸长性能无显著变化;纤维静摩擦因数提高了22.5%～61.6%;动摩擦因数在各试验条件下无明显变化;宜采用常压等离子体处理芳砜纶纤维.     

兔毛衫防掉毛等离子体改性技术研究

采用有极低真空低温等离子体对兔毛纤维进行表面改性,可使纤维表面摩擦系数明显增加,进而增强了纤维间的抱合力,提高了兔毛纤维的可纺性,有效地减少了兔毛衫的严重掉毛。     

碱处理对酪蛋白改性丙烯腈纤维组分与性能的影响

酪蛋白改性丙烯腈纤维在后整理加工及应用中涉及化学处理对其组分与性能的影响,如果化学处理条件不当,将会引起纤维性能的急剧恶化,严重影响后整理工艺及一定程度上破坏纤维的服用性能.基于以上考虑,采用不同pH值的碱分别对不同酪蛋白质量分数的改性丙烯腈纤维进行处理,运用化学试剂法分析碱处理前后纤维化学组分的变化,探讨碱pH值对纤维中均聚物、游离酪蛋白、接枝酪蛋白以及接枝率的定量影响;同时,研究了碱处理前后不同组分纤维的力学性能变化,分析影响酪蛋白改性丙烯腈纤维力学性能的组分因素与碱处理条件因素.期望研究结果为酪蛋白改性丙烯腈纤维生产中投料比的选择以及后整理加工工艺选择起到一定的指导作用.     

TENSILE BEHAVIOUR OF ROTOR SPUN YARNS

This paper deals with the tensile behaviour of rotor spun yarns. Having regard to the spe-cial construction of rotor spun yarn, some modifications for Hearle's theory have been made inorder to apply Hearle' s theory to rotor spun yarn. The paper then goes into calculating thetensile curve and investigating the effect of main parameters and spinning conditions on thetensile behaviour of rotor spun yarn. It was found that the following facts are noteworthy forimproving the mechanical properties of rotor spun yarn: (1) Selecting suitable navel so as tocontrol the P. T. E. length within a reasonable range. (2) Improving the design of single fibresupply device to decrease the amount of spoiled fibre and hence increase the effective fibrelength. (3) Increasing spinning yarn tension without yarn break to enhance the fibre migrationratio. (4) For the rotor spun yarn of industrial use, it is the way to increase the yarn strengththat the rotor groove should be designed with the groove angle beneficial to decrease the yarnspecific volume.     

AN INVESTIGATION OF THE RELATION BETWEEN COTTON FIBRE PROPERTIES AND YARN QUALITY BY USING HIGH VOLUME INSTRUMENT(HVI)SYSTEM

The objective of this paper is to establish reliable prediction equations relating cotton fibreproperties measured by HVI system and yarn quality,A useful statistical method is adopted for de-veloping a multiple regression model interpreting the relation between the data of Spinlab HVIfibre properties and quality parameters of yarn STQ (Strength Tex Quotient).The percent relativecontribution of a fibre property with respect of STQ is also assessed.The results show that the totalcontribution of the HVI measured fibre properties can account for 77.4% of known variation ofyarn STQ.The main feature of the approach is its flexibility in accommodating all fibre properties.The examination of regression equation showed that it could be well applied to predict STQ ofyarns spun from the same spinning system,but,for different spinning systems and also for yarns ofdifferent linear density,modification of the equation would be needed.     

THE INFLUENCE OF COMBING ROLLER SPEED ON PURE RAMIE NOIL ROTOR YARN QUALITY AND SPINNING PERFORMANCE

This paper reports the optimum design of combing roller speed with reference to yielding 6-13 Ne(98.4—45.4 tex) pure ramie noil rotor-spun yarns. The universal rotatable composite design is adopted to get the highly precise regression equations, in which the variables are combing roller speed and yarn linear density considered to be the main technological parameters of combing roller and, the responses are the evaluation indexes concerning spinning stability, fiber length distribution of fibre ring from rotor groove and yarn properties. Based on these regression equations, the contours are plotted to analyse the influences of the parameters on the evaluation indexes; the optimization multicriteria mathematical model is simultaneously established to obtain the optimum parameters with the aid of Object Programming Approach along with Constrained Random Ray Method. Finally, an experiment is carried out to further test the acceptance of the calculated optimum values. It is shown that, for any yarn linear density within 6—13 Ne (98.4—45.4 tex), combing roller speed varying from 5000 to 9150 r/min affects content of extra-long fibre in fibre ring from rotor groove and yarn properties but does not significantly influence spinning stability; 7075 r/min, at which the SAQ-12 type of saw-toothed combing roller runs, is recommended to be the optimum combing roller speed for producing 6—13 Ne (98.4—45.4 tex) pure ramie noil yarns, where a compromise is achieved among the lowest content of extra-long fibre in fibre ring, the best spinning stability and the best yarn properties.     

Study on Properties of Jute Fibres Spun on Ring Spinning System

Jute fibre properties,viz. linear density,mechanical properties,and fibre staple length were analyzed in this paper. Morphology,lignin content,and composition analysis for jute fibres were investigated in order to give further understanding of the fibre properties changing during the chemical treatment and yarn producing processes. The results show that jute properties are greatly changed during the processes of chemical treatment,breaking carding,and finisher carding,whereas slight changes can be found in ...     

APPLICATION OF COMPOSITE FIBRE TO HIGH ELASTIC KNITTED FABRIC

The knitting condition and technology for PBT/PET composite fibre on loop wheel machine as well as the effect of knitted fabric structure and stitch parameter are discussed in this paper. The properties of high elastic plain knitted fabrics are also discussed.     

紬丝包芯纺纱的探索

本文介绍了一般的包芯纱,包绕纱中纤维的组合形式、纺纱方法及成纱特点。在此基础上介绍了(纟由)丝包芯纺纱的工艺、试验所用的材料、成纱品质及其与(纟由)丝的比较。从而指出(纟由)丝包芯纱兼备了(纟由)丝和化纤长丝的特点。因此,(纟由)丝包芯纺纱有继续探索的必要和可能。     

用灰色关联分析影响转杯纺纱品质指标的因素

采用棉纤维的 Ｈ Ｖ Ｉ指标,应用灰色关联分析法指出在棉纤维的各项 Ｈ Ｖ Ｉ指标中,纤维强力是与转杯纱的品质指标密切相关的,用高强力、低马克隆值的原棉可以获得高品质指标的转杯纱。     

Tensile Property of Bi-axial Warp Knitted Structure

The tensile property of bi-axial warp knitted fabrics is tested and compared with that of the plain weave fabric. The results show that there are obvious differences between the tensile property of a bi-axial warp knitted fabric and that of a plain weave fabric. The former can give fuller play to the property of a high modulus yarn than the latter. The tensile strength of a bi-axial warp knitted fabric is linear with the number of yarns in the direction of force.     

喷气纺纱成纱机理研究

从50年代末美国 Du Pont 公司提出利用缠绕方法纺纱到现在,喷气纺纱在设备上得到了很大的发展。但是,对于这种纺纱方法的加捻与成纱机理的研究却是非常少的。本文提出了喷气纺纱过程中假捻区捻度形成的一种机理,可以用来解释单、双喷嘴情况下的捻度分布情况。通过对村田(孪生双喷嘴)及 Du Pont(单喷嘴)纺纱原理的对比研究,提出了包缠纤维的形成机理。分析表明,由于村田原理喷嘴的安排使第1喷嘴与前罗拉钳口之间纱线的自转与气圈回转的方向相反,推后了边缘纤维被纱线夹持的位置,使较多的边缘纤维有可能在纱线中成为有效的包缠纤维。进而阐述了喷气纱的特点:毛羽的单向性、包缠纤维及纱芯捻度的不均匀性、单、双喷嘴成纱条件和成纱质量的区别,主要纺纱参数对纱线强力的影响等。