Cyanoethylated Starch Thickeners as Substitutes for Sodium Alginate in Printing with Reactive Dyes

Cyanoethylated starches were prepared by reacting rice starch with acrylonitrile in presence of sodium hydroxide. The suitability of the modified starches in printing cotton fabrics with reactive dyes was investigated through application of pastes containing cyanoethylated starches and reactive dyes to cotton fabric, fixation of the prints by steaming or thermal treatment, assessment of colour strength and overall fastness properties of the prints, examination of rheological properties and carrying out parallel experiments using sodium alginate, unmodified starch and alkali-treated starch. Cyanoethylated starches particularly that containing 1.75% N proved to be a potential thickener for printing cotton with reactive dyes.     

真丝绸涂料拔染印花

为改进真丝绸拔染印花的色牢度，选用涂料代替染料进行印花。通过试验，筛选耐拔涂料、增稠剂、粘合剂和湿摩擦牢度增进剂，发现拔白剂宜选择次硫酸氢型，增稠剂为化学增稠剂，并进行二次增稠，粘合剂选用101-APF；用湿摩擦牢度增进剂处理时，可将其直接加入至色浆中，工艺简单，效果好。涂料拔染印花真丝绸保持了丝绸的柔软手感，各项色牢度均较佳，尤其是湿摩擦牢度，可达3级或以上。     

蚕丝和棉织物的活性喷墨印花

对蚕丝和棉织物活性染料喷墨印花的上浆预处理和喷印后汽蒸进行比较研究,结果表明:用海藻酸钠和羧甲基纤维素上浆的蚕丝印花织物颜色深度相近,而棉织物则是用羧甲基纤维素上浆时颜色深度更高;用碳酸氢钠作碱剂时,蚕丝和棉织物在颜色深度和颜色稳定性方面的表现更佳;为了获得较深的颜色,棉织物较蚕丝织物需要更多的碱剂和尿素,而所需元明粉的用量是相同的;在汽蒸时,活性染料在棉上的固色率低于在蚕丝上的固色率,但其固色速率高于在蚕丝上的固色速率;蚕丝和棉织物的最佳喷墨印花工艺参数有所不同。     

Single-stage process for bifunctionalization and eco-friendly pigment coloration of cellulosic fabrics

A facile single-stage process for enhancing the antibacterial activity and UV-shielding property of cotton and viscose pigment prints was reported. Results indicated that both the functional and coloration properties of the obtained pigment prints were improved significantly by incorporation of TiO₂ nano sol (average molecular size ≈5 nm, 15 g/kg) into the solvent-free pigment printing pastes. Differences in the imparted antibacterial activity and UV-blocking properties as well as in the depth of the modified pigment prints were attributed to the differences in the type of cellulosic substrate, efficiency of the used binding agent, extent of loading, and immobilizing both the TiO₂-NPs and pigment particles during the microwave-fixation step as well as on the type of pigment colorant. Also, the obtained results demonstrated that the modified pigment prints, i.e. TiO₂-NPs-loaded pigment prints, showed durable antibacterial efficacy and UV-shielding capacity even after 15 washing cycles, regardless of the used substrate. The scanning electron microscope images and EDX spectra of selected samples were also reported.     

圆网印制纯棉仿蜡防花布生产实践

通过对影响圆网印花机印制仿蜡防花布的诸因素的研究,解决了用圆网印制仿蜡防花布的渗透问题,使仿蜡防花布比滚筒印花机更具有其特点：花回大、得色浓艳、渗透好。     

数字印刷对废纸回用性的影响

黑色喷墨印刷废纸回用时生成不能除去的脏点,而彩色喷墨印刷废纸则使纸成品产生色荫,采用常规的浮选法或洗涤法很难除去;对其中印刷时不用颜料而用染料这一情况,有的可用通常的H2O.脱色,大多数可用Na2S2O4除去,臭氧脱色效果最佳但对黄色的脱色效果差.为了提高调色剂油墨印刷废纸的可回用性,除改进废纸脱墨流程的有关条件外,改变激光、静电等调色剂油墨印刷过程中的一些参数,如熔融温度、熔融方法、印刷速度、熔融辊软硬度等,可改善调色剂印刷废纸的可回用性.     

纯棉活性印花织物色差原因分析及改进

分析了前处理、印花和后整理工艺中,影响棉织物活性印花产生色差的因素。重点讨论了色浆处方和印花工艺条件对色差的影响;对于固色和阻燃等后整理中难以克服的色差问题,指出了相应的控制措施。     

颜料墨水对织物喷墨印花的适应性能

为了探讨颜料墨水对不同织物喷墨印花的适应性,选用棉、涤纶、蚕丝、天丝、涤/棉、棉/锦、涤/锦/棉等不同纤维种类、不同组织结构的织物,采用自制六色颜料墨水在8 pass,720 dpi打印单色块,分析颜料墨水印花的颜色深度、色牢度、清晰度以及织物风格等性能。实验结果表明:打印织物表面性能是影响喷墨印花性能的主要因素之一;对亲水性纤维,结构紧密的织物可以将墨水贮留在织物表面,打印K/S值大,清晰度高,但牢度略低;对抱水性能较低的稀薄涤纶、蚕丝织物,为了确保喷墨印花的印制精细度,预处理是必要的。     

纺织品转移印花现状及发展

转移印花因其占地面积小,工艺流程短,花纹清晰、逼真,特别适宜小批量多品种的生产,是当今比较流行的印花方法之一。转移印花,可分为热转移印花和冷转移印花。介绍了近年来转移印花的研究现状与进展,包括其工艺、材料及其设备情况,以及生产彩色印花织物的新技术-染料热扩散转移印花。     

棉织物表面处理对活性染料喷墨印花的影响

织物的表面结构和性质是影响喷墨印花颜色效果的重要因素。采用2种不同的纯棉织物,并用改性聚丙烯酰胺、石油加氢轻馏物、丙烯酸共聚物以及海藻酸钠分别对棉织物进行表面处理,分析了织物组织结构和表面处理工艺对5种活性染料喷墨印花颜色的影响。结果表明,密度低的织物经过活性染料喷墨印花后所得到的颜色比密度高的深,湿摩擦牢度略差。非离子且亲水性较好的聚丙烯酰胺处理后织物的活性染料喷墨印花颜色效果优于石油加氢轻馏物、丙烯酸共聚物以及海藻酸钠。元明粉对活性染料喷墨印花的颜色没有明显的增深作用规律。     

牛津纺织物的印花防沾污

结合工厂牛津纺单分散印花工艺，从染料的选择和印花工艺等方面探讨了解决牛津纺印花染料沾污的途径，以有助于充分体现印花牛津纺特有的提花效果。     

超级仿蜡印花

真蜡印花布的印花效果正反面完全一致,普通仿蜡印花布则难以获得逼真的蜡印风格,将无接触式预烘方式和远红外热辐射器引入刮刀式圆网印花机,对其烘房进行改造,解决了仿蜡印花透印与拖色的矛盾,生产出具有逼真蜡印风格的超级仿蜡印花布.     

Preparation and Characterization of Carboxymethyl Starch (CMS) Products and Their Utilization in Textile Printing

Starch and oxidized starches of different molecular sises were carboxymethylated under identical conditions. The degree of substitution (DS) of the so obtained. CMS samples increases by decreasing the molecular sise of starch which, indeed, is a manifestation of higher extents of oxidation. The latter was effected using different sodium hypochlorite concentrations and the extent of oxidation was expressed as chlorine consumption. Pastes of these CMS samples exhibit pseudoplastic behaviour and their apparent viscosity decreases as the extent of oxidation increases, when used as thickeners in printing polyester fabric with disperse dyes, these pastes bring about prints the colour strength (K/S) of which are comparable with these for conventional thickeners, namely commercial CMS and sodium alginate. Mixing of sodium alginate with the prepared CMS samples increases the efficiency of the latter to act as the thickening agent. The highest K/S is obtained with CMS derived from starch oxidized using 1.25g active chlorine/1. Mean while, the colour fastness properties of the prints towards rubbing, washing and perspiration are nearly equal to those fabrics printed using the conventional thickeners such as sodium alginate or commercial CMS.     

印花增深剂NZ

介绍了印花增深剂NZ在活性染料印花和涂料印花中的应用效果。结果表明,印花增深剂NZ具有明显的增深性,可替代印花糊直接用于印花。在达到增深效果的同时,有助于提高活性染料印花织物的耐皂洗色牢度耐摩擦色牢度以及织物手感。使用印花增深剂NZ印花时,无需蒸化,直接烘干即可,工艺简单,流程短、能耗小。     

改善纯棉高支高密印花产品布面效果工艺探讨

分析了纯棉高支高密印花产品溢浆现象产生的原因，并通过对传统工艺的改进，优选糊料，合理选用网目，采用防印工艺协调排网等方法有效地解决布面色花问题，效果显著。     

Synthesis and Applications of Nano Binder Based on Plant Oils

The importance of using renewable feed stocks in the textile industry area are expected to increase in the next few decades due to the limited natural resources coupled with an increased environmental legislation for eco-friendly and sustainable technologies. This research work focuses on the possible future applications of microwave irradiation in this field. Alkyd resins with highly distinct characters and reactive properties, based entirely on commercially available renewable resources, including sunflower or soybean oil, are prepared and characterized. The rheological properties, apparent viscosity of prepared binders, and roughness of the prints were described. The study was extended to application of the prepared alkyd resins as a binder in pigment printing operations onto cotton fabric by using a flat screen technique. The optimum curing conditions as well as the color strength and fastness properties of pigment printed areas to light, washing, perspiration and crocking, were evaluated.     

真丝绸金银粉(粒)印花的连续性大生产

总结了真丝绸金、银粉 （ 粒） 印花连续大生产的经验， 如金银粉（ 粒） 选择、筛网选择、印花设备选择和排网顺序、原浆选择及调浆处方、焙烘和蒸化工艺等， 并提出了印花操作要点及注意事项。     

纸张胶印品透印现象的预测与控制

为了有效预测和控制透印,提出采用抗透印值PTR来预测胶印品的透印性。以3种胶版纸和2种新闻纸为纸样,先测试它们的不透明度、油墨吸收性等性能,然后,在3组印刷条件下,利用IGT适性仪打印实地色块,并测量样条色块区与非色块区背面的色度值,考察了5种纸样的抗透印值PTR与印样透印量(用色差ΔE*ab表示)之间的关系。研究结果表明,适当降低印刷压力并提高印刷速度可降低印样的透印量;在相同印刷条件下,青墨印样的透印量略大于品红墨印样的透印量。另外,当待印纸样的抗透印值PTR增大时,印刷后纸样印区的透印量就会减小,特别是当测试纸样PTR值72%时,无论在何种印刷条件下,其胶印透印量均小于6,可在视觉上认定没有产生透印现象。     

基于观测光源的打样颜色一致性研究

本文将印刷品观测光源信息引入印刷色彩管理流程,通过获取观测光源的相对光谱功率分布,采用不同光源下颜色光谱反射率转换的计算方法,在不同观测光源下分别计算印刷和打样输出标准色靶色块的可见光谱的光谱反射率,生成观测光源下的印刷设备ICC特性文件和打样设备ICC特性文件.采用两种ICC特性文件分别输出样张,在不同的观测光源下,达到打样样张与印刷样张在颜色视觉上的最佳匹配.     

浅谈印花调色问题与改进

国内许多印染企业印花生产都发现不同程度存在印花调色时间长、印花色差问题,特对此问题详细分析,提出一些改进措施,如采用印花调色技术培训方法和加强调色管理方法,促进印花调色水平快速提高,减少调色时间和印花色差,提高印花产品质量,降低生产成本和及时交货。