塑可丽~?塑料革新水转印工艺

塑可丽?塑料与水转印工艺的完美结合,可减少水转印工艺中的喷底漆工序,既绿色环保,又节约成本;同时水转印层可遮盖掉采用塑可丽?塑料注塑成型制件的表面缺陷,且清漆层可解决耐候性问题。另外,本文研究了水转印层与塑料基材间的附着力影响因素,有效解决了去掉底漆工艺后附着力低的问题。     

不同表面处理方式对PEEK粘接强度的影响

采用砂纸打磨、喷砂和等离子处理等方式对PEEK进行表面处理,并使用环氧胶进行粘接。通过粗糙度仪、接触角测试仪和万能材料拉伸试验机对PEEK的粗糙度、润湿性和粘接强度等特性进行表征分析。结果表明,不同的表面处理方法对PEEK粘接的性能影响不同。砂纸打磨和喷砂能够有效增加PEEK表面的粗糙度,增大PEEK与粘结剂的粘接面积,从而提高PEEK的粘结强度。而等离子处理能够有效降低PEEK表面的接触角,改善PEEK表面的润湿性,提高PEEK的粘接强度,并且等离子处理后PEEK的粘接强度比未处理、砂纸打磨和喷砂分别提高了600%、260%和110%。     

胶粘剂在手机后盖粘接中的应用

文中主要介绍了手机后盖材料、装饰油墨、中框材料以及这些材料对粘接效果的影响。其中玻璃的成分,玻璃的加工工艺,塑胶板材的加工工艺都会影响后盖材料的内部应力及形变量;油墨的配方设计,中框材料的表面处理会影响表面性能。内部应力,形变量及表面能对粘接效果有较大影响;介绍了后盖粘接的整机要求,手机后盖粘接的主要方案及主要的胶粘剂。其中VHB胶带由于具有闭孔发泡结构,能够提供优异的抗起翘性能、贴服密封性能;具有较强的内聚力,能够保证在跌落过程中不分层,不脱落;在移除过程中不分层,干净移除。     

铝材木纹热转印新工艺

通过与上下游产业链的联合研发,基于升华转印和热融转印的原理,取长补短开拓出一种铝材木纹热转印新工艺,避免了升华转印热冲击对木纹色牢度的影响,并解决转印图案超耐候性无法有效控制的难题。     

化学刻蚀法制备黄铜基超疏水表面

采用含有三氯化铁和盐酸的水溶液刻蚀金属黄铜表面，在黄铜表面上得到了一层由不规则块状结构和更细小的乳突状结构相结合的具有双重粗糙度的阶层结构。该表面经氟化处理后表现出超疏水性，水在该表面上的接触角达到了157°，接触角滞后为5°。考察了不同刻蚀时间对表面疏水性的影响，结果表明，刻蚀时间对表面上这种阶层结构的形成和水滴在表面上的接触角数据都有十分重要的影响。随着刻蚀时间的增加，表面上逐渐开始形成粗糙结构，接触角数据也不断增加，增加到一定数值后，接触角变化开始不明显。接触角滞后随着接触角的增加而减小。初步分析了这种阶层结构的形成机制，并用Cassie理论对表面的润湿性进行了分析。     

一种油墨印花转印橡胶踏板垫的硫化成型模具及应用

本文在克服我国现有油墨印花转印橡胶踏板垫生产存在的不足,提供了一种油墨印花转印橡胶踏板垫的硫化成型模具及应用方法。采用本方法可有效防止印花转印橡胶踏板垫表面的印花发生变形或转印不清楚,大大提高了生产所得印花转印橡胶踏板垫的质量,使其能够同时满足高档汽车对质量与外观的要求。     

咪唑啉型自乳化环氧树脂固化剂的研究

文章主要叙述了咪唑啉型自乳化环氧树脂固化剂的乳化性能,对其作为潮湿表面粘接和新老混凝土粘接过渡层,与通用的几种水下环氧树脂固化剂进行了比较,说明了咪唑啉型自乳化环氧树脂固化剂具有使用方便,用作潮湿表面粘接和新老混凝土粘接过渡层性能优异的特点。     

羟甲基共聚酰胺的制备和研究

以甲酸为催化剂，甲醛与共聚酰妥ＰＡ（６／１０１０）缩合，制备羟甲基聚酰胺。利用小角激光散射、ＤＴＡ谱图，比民阻、接触角测定、应力－应弯曲线粘接试验等手段对其进行了研究。羟甲基以后，共聚酰胺的结晶形态发生了变化，熔点下降，断裂力降低但亲水性提高，对铝材的粘接力增大。通过对其固化体系和固化条件的调整，可以增加固化程度并强化对铝材的粘接能力。     

涂有油墨的度盘遮板与面罩的粘接

1　前言我厂在 6 0 2型汽车收放机生产过程中 ,需要将度盘遮板与面罩粘接在一起 ,因度盘遮板上涂有油墨 ,粘接屡遭失败。汽车收放机面罩材料是ＡＢＳ ,度盘遮板的材料是ＰＶＣ ,遮板上丝印用的油墨是玻璃油墨。当度盘遮板上无油墨时 ,与面罩粘接还比较容易 ,而在度盘遮板涂有油墨的情况下实施粘接 ,无疑困难多了。同时 ,工艺要求粘接牢固 ,外观效果好 ,且油墨层不能被破坏。2　胶粘剂的确定开始 ,我们选用了乐泰 4 0 1型快干胶、丙烯酸酯双组分胶等。虽然粘接后在短时间内效果比较理想 ,但是 ,经过高温、低温、潮湿、振动实验后 ,粘接件与被…     

EVA热压粘接PP/m-LLDPE的性能研究

通过接触角和剥离强度的测试,研究了乙烯-醋酸乙烯共聚物(EVA)作为热熔胶热压粘接聚丙烯(PP)和茂金属催化线性低密度聚乙烯(m-LLDPE)的性能,并采用红外、扫描电镜分析了PP/EVA40-2/m-LLDPE复合材料剥离后的破坏区间。结果表明,EVA接触角较小,表面能较高,润湿性较好,采用EVA能有效改善PP/m-LLDPE的粘接性,EVA40-2与PP、m-LLDPE之间的剥离强度分别达到了14.7N/25mm和18.3N/25mm(PP和m-LLDPE剥离强度只有0.8N/25mm);另外,扫描电镜观察PP/EVA40-2/m-LLDPE的剥离表面以及剥离界面,发现在剥离界面处产生大量的无规则塑性形变并存在有少量破坏后的纤维丝,破坏区域发生在PP层和EVA层之间,剥离后,EVA表面凹凸不平,PP表面则较为平滑。     

Ionic liquids as performance additives for water‐based printing inks

For the first time, the use of ionic liquids as additives for printing inks in order to improve the wettability of the printing base by the ink is presented. The aim of this work was to study the influence of ionic liquids on the selected properties of water‐based printing ink and the prints. The contact angles of the printing inks on the printing base were measured. Modified flexographic inks were laboratory printed on polypropylene plastic film. The impact of small amounts of various ionic liquids on printing ink colour was examined in terms of the optical density of the full‐tone area, the colour parameters (L*, a*, b*, CIE), the total colour difference, and the gloss of the dried ink film. The influence of ionic liquids on the ink contact angle, the optical density, and the L*a*b* coordinates is discussed. In general, the investigated ionic liquids improve the wettability of water‐based flexographic printing ink, with an acceptable total colour difference. The optical density is increased for printing inks containing ionic liquids in comparison with the original flexographic printing ink, Process.     

润版液在提高油墨传递质量中的应用

通过水／墨平衡对接触点、油墨传递质量影响因素的分析，认为润版液在油墨传递质量中作用重大，并提出了润版液在油墨印刷故障中的应用方法。     

Effect of PI film surface on printing of Pd(II) catalytic ink for electroless copper plating in the printed electronics

Pd(II) catalytic ink was synthesized by the hydrolysis of PdCl₂, followed by treatment with a small amount of stabilizing agent. The Pd(II) ink has excellent storage stability and the same low viscosity and surface tension as water. Polyimide film was used as a substrate for inkjet printing of the Pd(II) ink, while various characteristic changes of the printing were observed according to the contact angle on the substrate surface. The contact angle was affected by the concentration of KOH solution, and a surface condition suitable for composing Copper circuit was obtained by printing Pd(II) catalyst ink and electroless plating when it was treated in 1 M KOH solution for 10 min. The physical properties of Pd(II) ink were analyzed using a surface tension meter, viscometer, pH meter and UV–visible spectrophotometer, whereas the surface properties of polyimide film were analyzed using a contact angle instrument, FTIR-ATR, video microscope, XPS, FESEM and AFM. The physical properties of Pd(0) particles were analyzed by XPS and AFM, while the characteristics of electroless copper plating were analyzed by video microscope and XPS.     

Evaluating the Effectiveness of Using Flexography Printing for Manufacturing Catalyst‐Coated Membranes for Fuel Cells

This study is an evaluation of the effectiveness of the flexography printing process for manufacturing catalyst‐coated membranes (CCMs) for use in proton exchange membrane fuel cells (PEMFCs). Flexography is a maskless and continuous process that is used in large‐scale production with water‐based inks to reduce the cost of production of PEMFC components. Unfortunately, water has undesirable effects on the Nafion® membrane: water wets the membrane surface poorly and causes the membrane to bulge outwards significantly. Membrane printability was improved by pre‐treating membrane samples by water immersion for short periods (<2 min). This pre‐treatment was used to control the membrane deformation before printing to limit the impact of the ink transfer. Water and ink drop deposition experiments were performed to estimate the liquid‐air‐Nafion® apparent contact angle and the locally induced membrane deformation. Despite the short immersion times used in the tests, the immersion pre‐treatment appeared to induce structural modifications that enhanced both the membrane wettability and the dimensional stability. Flexography printability tests were performed on these treated membranes and showed that the dimensional instability of the Nafion® membrane was the critical parameter for limiting the ink transfer. The immersion pre‐treatment improved the printability of the Nafion® membranes, which were used to fabricate cathodes that were tested in an operational fuel cell.     

Evaluation of viscosity and printing quality of chitosan‐based flexographic inks: The effect of chitosan molecular weight

Inks composed of renewable resources are important for the environment protection. We report preparation of a new type of edible chitosan‐based flexographic ink. The performance of three inks, containing three different molecular weight (MW) chitosan, was analyzed by the different experimental techniques. The Ink viscosity was investigated from the parameters shear rate, time, temperature, and flexographic printing simulation. The printing quality on coated paper was studied by the scratch resistance, contact angle, print fastness, chromatic aberration, and dot gain. Viscosity recovery rate reached 69% after 6 s, and the print fastness was up to 91%. The experimental ΔE is 0.97, the dot gain is 23%, and contact angle is 69° for the best ink. Experimental results indicate that the developed ink is suitable for the flexographic printing with good application prospects. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43997.     

微乳液型油墨清洗剂的研制

为克服传统溶剂型油墨清洗剂易燃易爆、污染环境等缺点,以复配表面活性剂、溶剂、水及其它助剂制备了一种微乳液型油墨清洗剂,对微乳液稳定性等及油墨去污率进行了测定,研究了不同温度及时间对油墨清洗效果的影响。结果表明,常温下使用时,微乳液型清洗剂的油墨去除率达95%以上,最佳清洗温度为25～40℃,最佳清洗时间为15 min,具有安全性能高、清洗能力强、防锈缓蚀性好及环境友好等特点。     

Effect of liquid droplet impact velocity on liquid wicking kinetics in surface V-grooves

The liquid droplet inertia effect on liquid wicking in V-groove has direct implications to the liquid sample flow in microfluidic devices using V-groove channels and to the ink wicking along the inter-fibre gaps on uncoated paper surfaces, which is critical to the ink jet print quality. In this study liquid droplet inertia and the V-groove geometry is systematically varied to understand the effect of droplet impact, V-groove apex angle and groove width on the liquid wicking rate in the groove. Our results show that both the apex angle and the groove width influence the rate of liquid wicking in V-grooves forced by liquid droplet inertia. The inertia effect lasts for only a short time and its influence to the sample delivery accuracy in V-groove microfluidic devices can be minimised or eliminated by improving microfluidic channel design. On improving ink jet printing quality of uncoated papers, this work shows that applying surface sizing to uncoated ink jet papers is likely to be an effective way to change the geometry of the inter-fibre gaps and therefore can reduce the feathering effect in ink jet printing.     

Preparation and properties of alcohol-resistant thermal transfer printing inks for multifunctional label printing via physical blending of resins

Due to the rise of the logistics industry and the widespread use of ink labels, problems such as the narrow operating temperature range of ink, poor alcohol resistance, and insufficient scratch resistance need to be solved urgently. In this work, creates alcohol-resistant thermal transfer inks by mixing polypropylene chloride (VP-365) and epoxidized hydrogenated bisphenol A (P) resin and incorporating them into the ink formulation. The synthetic ink has a lower glass transition temperature (118.2°C), allowing the ink to print at lower temperatures. It has small wetting angles (68°, 63°, 58°, 46°, and 40°) and a large adhesion force (10.44 – 14.4 N) for different labels. Further, to evaluate the printing performance of the ink, the ink was scratched under 1000 g pressure and in the environment of isopropyl alcohol to evaluate its printing performance. The produced ink has high scratch resistance (300 times) and good alcohol resistance (140 times). Moreover, the developed ink showed good printability, printing media versatility, high adhesion, and excellent alcohol resistance. The synthesis method is facile and cost-effective, which paves a novel way towards high-performance ink printing and thermal transfer technology industries.     

Visualization and simulation of the transfer process of index‐matched silica microparticle inks for gravure printing

A combined experimental and computational study of the transfer of transparent index‐matched silica‐particle inks between two flat plates is presented for gravure printing applications. The influence of printing speed and initial ink droplet size on the ability to accurately transfer ink during the printing process is explored systematically. Smooth interface volume of fluid simulations show the same trends as the ink transfer observed in experiments over a wide range of printing speeds and for inks having different silica particle loadings. Our calculations indicate that for ink droplets with characteristic dimensions in the vicinity of 10 μm, which are of particular interest for gravure printing applications, ink transfer improves significantly due to the diminishing effect of gravity, and the increased importance of capillary forces at small length scales. © 2016 American Institute of Chemical Engineers AIChE J, 63: 1419–1429, 2017     

Polyurethane Synthetic Papers Based on Different Inorganic Fillers with Water and Fire Resistance

Polyurethane synthetic papers based on different inorganic fillers are prepared via wet phase inversion process and inorganic mineral filling modification technique. The surface and cross‐section morphology, tensile strength and elongation at break, fire resistance, water and oil adsorption, ink contact angle, writing and printing effects, and water resistance of synthetic paper are investigated, respectively. A large number of pores are present on the surface and in the interior of the synthetic papers and provide huge space for ink molecules. The synthetic paper with transparent powder filled exhibits the optimal performance in tensile strength and elongation at break. Moreover, the fire resistance of polyurethane is improved by inorganic particles, and the highest limit oxygen index value of synthetic paper reaches up to 31.8%, which meets the standard of flame retardant. Meanwhile, filled synthetic papers exhibit high water and oil adsorption capacity, good ink‐affinity, excellent writing and printing effects. In addition, filled synthetic papers perform well in water resistance when written and printed synthetic papers are immersed in water. This work may provide a new idea to design a novel, greener, and multifunctional synthetic paper for its broad applications.