TiO2涂层织物的隔热性能及其影响因素

以TiO2为功能粒子,采用涂层方法制得了隔热性能较好的TiO2涂层织物.通过扫描电镜分析对比了涂层前后织物及其纤维的形貌,讨论了基布材料、基布白度和涂层剂种类对涂层织物隔热性能的影响.结果表明:涂层后,TiO2粒子可牢固附着在织物纤维上,织物的隔热性能明显提高;基布材料对其隔热性能的影响较明显,基布白度和涂层剂对其隔热性能的影响甚微.     

超纤填充型聚酰胺涂层织物的制备及工艺优化

为提高聚酰胺涂层织物的服用性能，将开纤后聚酰胺/聚乙烯(PA/PE)超细纤维短纤与甲醇/氯化钙存在下的聚酰胺高分子溶液共混，制得超纤填充型聚酰胺涂层浆。涂层浆在涤氨纶混纺基布上经过双面刮涂、相转化、烘干等湿法涂层工艺操作，得到超纤填充型聚酰胺涂层织物。对涂层浆的黏度、相转化时间、焙烘温度等工艺条件进行设计和优化，分析比较不同制备工艺下涂层织物的微观形貌、干湿摩擦、硬挺度和掉粉情况，确定最佳涂层织物制备工艺。结果表明：涂层浆适宜的放置时间为1 h,涂层最佳厚度区间为20～24μm,当相转化时间和焙烘温度分别为5 s和80℃时，涂层织物的性能最优。     

柔软整理对夜光涂层织物性能的影响

为了阐明柔软整理对夜光涂层织物性能的影响,分别对经柔软预处理的基布和未经预处理的基布进行夜光涂层,借助余辉亮度测试仪、织物悬垂性测试仪、织物耐磨仪和KES织物风格评价系统对两种夜光涂层织物的发光性能、悬垂性、摩擦性和织物风格进行了分析。结果表明：与基布未经柔软预处理的夜光涂层织物相比,基布经柔软预处理的夜光涂层织物余辉亮度略有降低,耐磨性能、耐水洗性能略有下降,但手感得到明显改善。对基布进行柔软预处理可提高夜光涂层织物的综合性能。     

丙烯酸树脂涂层胶

涂层织物在人们生活中得到了广泛的应用,如雨伞、雨披、风雨衣、羽绒服、防寒服、运动服、窗帘布、桌布和沙发套等.随着涂层技术的不断发展,涂层产品的种类和花样也正在增多.所谓涂层,就是在织物的表面上涂刮一层树脂胶液,经干燥后形成一高分子薄膜,赋予织物以防水、防风、防羽绒外钻、保暖等性能,其所用的胶液称为涂层胶.涂层胶的种类较多,如聚氨酯(PU)、聚丙烯酸树脂(P A)、聚氯乙烯(PV C)、聚乙烯(P E)、氯丁橡胶(P CP)等.其中丙烯酸树脂涂层胶聚合物薄膜透明,不易泛黄,它具有耐光、耐热、耐老化等性能,对各种纤维的织物具有较好的粘结力,适用于不同要求的各类织物涂层,并且价格低廉,得到了广泛地应用,是目前用量最大的一种涂层胶.     

聚氨酯涂层长丝织物耐紫外光性能研究

以涤纶长丝为基布的聚氨酯涂层织物,在紫外光的照射下会发生“老化”现象,利用扫描电镜(SEM)、红外光谱仪(FTIR)对老化前后涂层织物的表面形貌和内部结构进行表征,并采用回归方程来预测涂层织物的力学性能变化趋势.结果表明:随着照射时间的延长,涂层织物力学性能下降,色差增大,聚氨酯的C-o和C-N发生断裂,涂层膜出现固结...     

常见涂层织物中涂层去除方法概述

选用N,N-二甲基甲酰胺(DMF)、环己酮、丙酮、四氢呋喃(THF)和乙酸乙酯5种常见的溶解试剂,对聚氨酯类、聚丙烯酸酯类及聚氯乙烯类涂层织物进行处理,分析这几种涂层的溶解性能,并深入说明这几种溶剂对织物基布成分的影响。结果表明,DMF对聚氨酯类涂层去除效果最好,环己酮对聚丙烯酸酯类涂层去除效果好,THF对聚氯乙烯类涂层去除效果好。在处理过程中,这几种溶剂对常见的纯棉、涤纶、涤棉混纺及锦纶织物基布基本没有影响。     

涤纶发泡涂层工艺分析

应用发泡涂层工艺赋予织物阻燃、防污等功能,使织物具有独特的风格,是节能减排的后整理工艺。介绍了涤纶发泡涂层工艺,包括涂层浆的配制,机械发泡参数和涂层参数的优选。针对生产中出现的浆料渗底、边中厚差、颗粒或水印、泡沫密度不稳定等问题,提出了解决措施。     

薄型涂层织物涂层剥离强力测试预处理方法研究

本文采用粘合剂粘合法和热封贴条法两种方法对涂层织物进行预处理,寻找合适的预处理方式使薄型涂层织物的涂层与基布可被顺利剥离,同时不影响涂层与基布原本的粘合强力,从而快速、准确测试薄型涂层织物的涂层剥离强力。     

气密性涂层织物的拉伸性能探讨

测试分析了4种涂层织物涂层前后拉伸性能的变化，结果表明，织物经涂层后其拉伸断裂强度和断裂伸长率都有不同程度的增长，且涂层对织物经、纬向拉伸性能的影响不同。对试验4种涂层织物而言，涂层增重率对织物经纬向拉伸性能的影响不同；在相似增重率条件下，涤纶基布涂层织物的经向拉伸变化率较锦／棉基布涂层织物的显著。     

聚氯乙烯涂层织物涂层剂去除方法研究

研究聚氯乙烯涂层织物上涂层剂的去除方法。测试了各种有机溶剂对聚氯乙烯涂层和基布纤维的溶解性,最终确定出采用四氢呋喃溶解涂层。认为,采用四氢呋喃溶解织物涂层的方法对基布纤维损伤较小,有利于准确定量分析纤维含量。     

一种新型的涂布技术--帘式涂布

介绍了帘式涂布技术的原理,帘式涂布机的结构、优越性、实践应用,指出该涂布技术的使用要求、注意事项及前景展望.     

Modelling coating quality in fluidised bed coating: Spray sub-model

Fluidised beds are widely used in industrial applications for the coating of particles. Little research has been performed in developing a model that is able to predict the quality of the coating process in terms of the coating thickness and uniformity and the occurrence of unwanted side-effects, including agglomeration, attrition and spray loss. The quality of the coating process in a fluidised bed is largely determined by the spray characteristics and the particle motion. As a first step in the development of a new model for the coating process in a top-spray fluidised bed, an accurate spray sub-model that describes the movement and the heat and mass transfers of the droplets in the coating process was created and experimentally validated.     

涂布纸工业中的羧基丁苯胶乳

从1960年开始,羧基丁苯胶乳已开始被应用于纸和纸板的涂布.今天,由于其优良的性能和经济性,羧基丁苯胶乳被涂布纸工业大量和广泛地采用.纸张和纸板涂布的主要原因是改进其外观并创造一个适合于印刷的表面.纸的涂布改进了平滑度、光泽度和不透明度,并使得表面具有均一的油墨接收性和高的油墨光泽度.胶乳较之蛋白和淀粉胶粘剂有很多优越性.这些优越性包括高固含量而低粘度,对涂料的粘度影响很小;在高固含量下具有优良的上机运行性;高纸张光泽度和油墨光泽度;高纸张表面强度.本文综述了胶乳对纸张性质的影响,这些内容不论对涂布纸工厂和印刷厂都是很重要的.     

Hydrocolloid coating of cheeses

Semi-hard and dry white brined cheeses were coated with hydrocolloid films based on κ-carrageenan, alginate and gellan. The cheeses were immersed in the gum solution followed by cross-linking of the gum solution to produce a coated product. A few coating films were then dried by airflow to induce better adherence of the coating to the coated object. The coated cheeses were stored at 4°C and at a relative humidity of 73%. Weight loss, gloss, roughness of surface area, changes in mechanical properties versus time (i.e. stress and strain at failure, stiffness and elastic properties), peel-bond strength of the coating film from the cheese and sensory evaluation were studied for each coated system. For the semi-hard cheese, all kinds of coatings reduced weight loss during 46 days of storage. With regard to weight loss, no significant differences between the various coatings were found. The coating contributed to a better color and gloss. The roughness of the coated cheese decreased after coating, since surface ruggedness was filled in by the film. Advantages in the textural properties of the coated cheese were observed. Since the coated cheese lost less water by evaporation, a desirable softer and a less brittle texture was detected. The elastic properties of the cheeses were estimated by calculating the recoverable work (the ratio between recoverable and total compressive deformation) of coated and non-coated cheeses. This parameter appeared to decrease from 48 to 34% after 24 days of storage; no advantage of the coated cheese was observed. The peel-bond strength of the film based on alginate was 1 g force/cm. In the case of the dry white brined cheese, no deliberate drying of the coated film was performed. All coatings reduced weight loss of the cheese with a significant advantage of the κ-carrageenan-based coating. The coatings contributed to a lower reduction in pH, thus a higher-quality cheese was obtained. In addition, the coated cheeses were softer and less brittle when compared to the non-coated cheese. The percentage of recoverable work of cheeses did not change even after 24 days of storage. The coatings increased the gloss of the cheese fivefold in comparison to the non-coated cheese. In a sensory evaluation, the coated cheese was found to be advantageous over the non-coated system. In general, cheese coating based on hydrocolloid films improved textural and sensorial properties when compared to non-coated cheeses. The coatings did not influence the taste of white brined cheese, and the technology involved is simple and relatively inexpensive.     

非接触式落帘涂布技术

帘式涂布是一种非接触式涂布方法,对下落的涂料膜(落帘)在冲击到移动的纸幅之前有具体的要求,高的冲击速度需要相应较高的纸幅移动速度;对纸幅不产生机械压力,因此就大大减少了断纸率,并且能形成较好的涂层,从而可降低涂布量,提高生产能力.这种涂布系统非常简单,并且具有易操作、生产效率高等优点.但是在操作过程中也容易产生一些问题,比如:不规则踵部的形成,空气夹带的产生,落帘的不稳定性.这些问题可以通过调整落帘涂布参数使其达到最优来避免.本文对落帘涂布的原理进行了重点阐述,并讨论涂布缺点产生的机理、落帘涂布的优点及其在应用中的要求和注意事项.     

涤塔夫伞面绸涂银工艺探讨

根据涂银伞面绸外观质量要求，筛选合适的涂层胶和银浆，给出涂银工艺处方，并对涂层中的注意事项进行说明。     

糖果挂糖衣技术

糖果挂糖衣是在成份不同的核果表面制成一层紧密糖壳的过程,是生产糖制品最古老的一项技术。早在古罗马时代,就曾有在果仁或坚果表面涂裹糖衣来制造糖果的文献记载。在阿拉伯和古埃及的早期文明中,这项技术也为人们所知晓。最早期的制造方法是使用圆形盘,盘的中心底部逐渐凹深,盘用链条吊在横梁上,下面是火或炉子,操作者摇动     

棉织物的丙烯酸酯类改性聚氨酯涂层

分别加入丙烯酸甲酯、丙烯酸羟乙酯或两者的混合体合成改性水性聚氨酯，并对棉织物涂层，在不同温度、时间及涂层量下，测试涂层棉织物的抗水性、强力伸长率及透湿性。试验表明，引入丙烯酸甲酯可提高涂层膜的抗水性、增加涂层膜的抗张强力；引入丙烯酸羟乙酯有利于涂层膜的透气性，提高涂层膜的断裂伸长率；适宜的工艺条件为140～150℃下交联1．5～2min。     

多功能涂层织物的制备

采用对环境污染小的水性聚氨酯作涂层剂，利用自制的羊毛角蛋白溶液对其进行改性以提高涂层织物的透湿性能，同时向涂层剂中加入抗紫外线纳米粉体。利用电子显微镜观察了涂层荆干法膜的表面形貌，采用红外光谱仪测试了其内部成分；对涂层后织物的各项主要性能进行了测试，其结果显示得到了集防水、透湿、抗紫外线功能于一身的多功能涂层织物。