钛白粉

关键词：金红石型钛白粉

Ink is an important material for packaging materials, printing, the printing patterns, characters in the substrate of ink components of main components and auxiliary components, they are evenly mixed and after repeated rolling into a sticky gelatinous fluid. Is composed of pigments, binders and additives. Basic composition:
1, pigment
Including pigments and dyes, pigment is divided into inorganic and organic pigments, the bright color, good dyeing force, put it to dry in a short time, so a wide application in the ink, such as azo, phthalocyanine pigments; the latter light resistance, heat resistance, solvent resistance, hiding power are better, such as titanium dioxide, cadmium red ultramarine, chrome green, etc.. Pigment particle state coloring, do not dissolve, is the most commonly used ink pigment. The dyes in use to prepare solution, a molecular state coloring, as the effect of pigment. Pigment to ink in a different color and color concentration, and the ink has a viscosity and drying of certain.
2, the connection material
One of the main component is the ink, as the medium dispersion pigment and auxiliary material, is composed of a small amount of natural resin, synthetic resin, rubber, cellulose derivatives soluble in drying oil or solvent system. Have a certain mobility, so that the ink to form a uniform thin layer in printing, after drying to form film has certain intensity, and protective effects on the pigment, make it difficult to drop. Binders for ink transfer, brightness, fixed speed printability and printing effect has great influence, therefore, selection of appropriate connection material is the key to ensure the well printed, according to packaging materials, printing requirements of different, to highlight ink adjustment connecting material composition.
3, the ink auxiliary components
Ink auxiliary component of many, mainly has the following several:
The filler
It is an adjustment of the ink concentration of additives, but also increase the ink film thickness, improve its wear resistance, it has no coloring and hiding power. Are barium sulfate, talcum powder, calcium carbonate, aluminum hydroxide, used to crush into a white powder.
The diluent
Its role is to reduce ink viscosity, prevent the occurrence of membrane peeling phenomenon, so that钛白粉 the ink has the adaptability. Commonly used diluents is linseed oil, mineral oil, low polymerization. The former is easy to mix with ink, soft effect; the latter dilution effect is obvious, but not excessive, otherwise the printing effect is not good.
The anti skinning agent
Its role is to inhibit ink drying speed, prevent ink in the mechanical dry conjunctiva. It is the main component of organic reducing agent and antioxidant. It can be added to the ink, can also spread to the contact printing machinery.
The anti anti Indian Agent
Its role is to prevent the printing ink layer is printed on the paper in the back, in order to guarantee the quality of printing. Anti Indian agent is the most commonly used corn starch.钛白粉
The slip agent
Its role is to improve the ink scuffing and liquidity, reduce the viscosity of the film, the smoothness of the paper, reduce galling. The ink used by microcrystalline wax, lubricating agent with high melting point of synthetic wax.
The other additives
There are many other additives, such as dispersing agent, wetting agent, drying agent, stabilizer.

油墨是用于包装材料印刷的重要材料，它通过印刷将图案、文字表现在承印物上油墨成分有主要成分和辅助成分，它们均匀地混合并经反复轧制而成一种粘性胶状流体。是由颜料、连结料和助剂等组成。基本组成的成分：
　　1、色料
　　包括颜料和染料，颜料分有机颜料和无机颜料，前者色调鲜艳，着色力强，放干时间短，所以在油墨中应用较广，如偶氮系、酞青系颜料；后者耐光性、耐热性、耐溶剂性、隐蔽力均较好，如钛白、镉红、铬绿、群青等。颜料以微粒态着色，并不溶解，是油墨中 的色料。而染料在使用时配制成溶液，呈分子态着色，效果不如颜料。色料能给油墨以不同的颜色和色浓度，并使油墨具有一定的粘稠度和干燥性。
　　2、连接料
　　也是油墨的主要成分之一，起分散色料和辅助料的媒介作用，是由少量天然树脂、合成树脂、纤维素、橡胶衍生物等溶于干性油或溶剂中制得。有一定的流动性，使油墨在印刷后形成均匀的薄层，干燥后形成有一定强度的膜层，并对颜料起保护作用，使其难以脱落。连结料对油墨的传递性、亮度、固着速度等印刷适性和印刷效果有很大影响，因此，选择合适的连接料是 印刷良好的关键之一，要能根据包装材料、印刷要求等的不同，随时高亮油墨调整连结料的组成与配比。
　　3、油墨辅助成分
　　油墨辅助成分很多，主要有以下几种：
　　①填充剂
　　它是一种调节油墨浓度的助剂，还能增加油墨膜层的厚度，改善其耐磨性，它不具着色钛白粉力和遮盖力。主要有硫酸钡，滑石粉、碳酸钙、氢氧化铝等，使用时将其研碎成白色粉末。
　　②稀释剂
　　它的作用是降低油墨粘度，防止发生剥膜现象，使油墨具有作业适性。常用的稀释剂有低聚合亚麻油、矿物油等。前者易与油墨混合，作用柔和；后者稀释效果明显，但切忌过量，否则印刷效果不好。
　　③防结皮剂
　　它的作用是抑制油墨的干燥速度，防止油墨在机械上干燥结膜。它的主要成分是有机还原剂和抗氧剂。它可以添加于油墨中，也可以撒布于接触油墨的机械上。
　　④防反印剂
　　它的作用是防止印刷油墨层反印到纸张背面，以 印刷质量。 的防反印剂是玉米淀粉。
　　⑤增滑剂
　　它的作用是改善油墨的耐摩擦性和流动性，降低粘度，提高膜层的光洁度，减少纸张拉毛现象。油墨中常用的增滑剂有高熔点的微晶蜡、合成蜡等。钛白粉
　　⑥其他助剂
　　其他助剂还有很多，诸如分散剂、湿润剂、干燥剂、稳定剂等。