表面处理改善人造板装饰原纸印刷性能的研究

发布时间：2018-04-11 10:48

本文选题：装饰原纸 + 表面施胶　；参考：《天津科技大学》2014年硕士论文

【摘要】：装饰原纸是以优质木浆、钛白粉、功能填料、助剂等为原料,通过纸机湿法抄造而成的一种特种纸,经印刷、树脂浸胶、叠合等可选工序处理后,用于纤维板、刨花板等人造板的底层平衡纸、面层装饰纸和护面表层纸。面层装饰纸是以可印刷装饰原纸(以下简称装饰原纸)为基材经印刷、浸胶后,热压在人造板表面,起到改善外观、提高阻抗性作用的一类人造板装饰纸。现阶段大部分优质装饰原纸从国外进口,国产装饰原纸质量与进口产品存在一定的差距,主要体现在表面强度、匀度、平滑度较低、颜色再现较差、图文清晰度不够等印刷适性方面的问题。为弥补上述缺陷,本论文以国产装饰原纸为基材,通过表面处理方法改善其印刷适性。本论文主要是采用表面施胶和颜料化施胶两种方法,对抄造完成的装饰原纸进行表面处理。在表面施胶部分,采用改性淀粉溶液和SAE乳液为施胶液,通过单一改性淀粉溶液施胶和两者复配施胶(改性淀粉：SAE为30：1、20：1、10：1和5：1),系统对比研究上述表面施胶方案在改善装饰原纸印刷适性方面的作用,得出最优表面施胶方法。基于表面施胶的研究结论,分别以碳酸钙、二氧化硅和钛白粉为颜料,对表面施胶液进行颜料化,通过改变施胶液和颜料的比例(即90：10、80：20、70：30、60：40和50：50)配制不同特性的颜料化施胶液对装饰原纸进行颜料化施胶处理,得出最优的颜料化施胶比例。在上述实验中均分别使用了商品SAE乳液和自制SAE乳液进行实验,对比二者在装饰原纸应用中的差别。从本实验中可以得出对装饰原纸进行施胶,施胶量在2g/m2左右,施胶速度为9m/min,采用淀粉和SAE乳液混合施胶可以提高装饰原纸的抗张强度和平滑度,吸水性保持不变,油墨吸收性降低,并且印刷后在中间调到亮调区域印刷的阶调再现性增强,其中当淀粉和SAE乳液的比例为20：1时,效果最好；对比自制SAE乳液和商品SAE乳液可以发现,自制乳液的性能更优,尤其在吸水高度方面；分别采用碳酸钙、二氧化硅和钛白粉与胶液进行复配,综合考虑后二氧化硅更适合应用于装饰原纸的表面施胶；改变不同的胶液和颜料比例,在胶料和颜料的比例为70：30时,装饰原纸获得了更好的印刷性能。对比施胶和颜料化施胶可以发现,在胶液中加入少量的颜料进行施胶可以更好的提高纸张吸水性和印刷色密度,阶调再现性,网点丢失等印刷性能。实验中分别对装饰原纸的渗透性、比表面积进行微观的观察,得到了纸张的吸收性能和表面结构数据,又采用扫描电镜和激光显微镜对纸张的表面形态进行直观的观察,将直观和微观结果综合最终得出适合装饰原纸表面处理的方法。
[Abstract]:Decorative base paper is a kind of special paper made from high quality wood pulp, titanium dioxide powder, functional filler, auxiliary material and so on, which is made by wet method of paper machine. It is used in fibreboard after the optional processes such as printing, resin soaking, laminating and so on.Particleboard and other wood-based panels of the bottom balance paper, surface decoration paper and surface surface paper.The surface decorative paper is a kind of wood-based decorative paper which is printed and embossed on the surface of the wood-based panel by printing and soaking. It can improve the appearance and enhance the impedance of the wood-based panel.At this stage, most of the high quality decorative base paper is imported from abroad. There is a certain gap between the quality of domestic decorative base paper and the imported products, mainly reflected in the surface strength, evenness, smoothness and poor color reproduction.Lack of clarity of graphics and text, such as printing suitability problems.In order to make up for the above defects, the printing adaptability of home-made decorative base paper was improved by surface treatment.In this paper, surface sizing and pigment sizing are used to treat finished decorative base paper.In the surface sizing part, modified starch solution and SAE emulsion were used as sizing solution.Through single modified starch solution sizing and compound sizing (modified starch: SAE = 30: 1: 20: 1 10: 1 and 5: 1 1), the function of the above surface sizing scheme in improving the printing adaptability of decorative base paper was studied systematically and the optimum surface sizing method was obtained.Based on the conclusion of surface sizing, calcium carbonate, silica and titanium dioxide were used as pigments, respectively.By changing the ratio of sizing liquid to pigment (90: 10 10: 20: 20 70: 30: 60: 40 and 50: 50) to prepare the pigment sizing liquid with different characteristics, the optimum pigment sizing ratio was obtained.The commercial SAE emulsion and self-made SAE emulsion were used in the above experiments, and the difference between them in the application of decorative base paper was compared.From this experiment, it can be concluded that the sizing quantity of decorative base paper is about 2g/m2, the sizing speed is 9 m / min, the tensile strength and smoothness of decorative base paper can be improved by mixed sizing with starch and SAE emulsion, and the water absorbency remains unchanged.The absorbability of ink is decreased, and the reproduction of printing order is enhanced when the ratio of starch to SAE emulsion is 20:1. The comparison between home-made SAE emulsion and commercial SAE emulsion can be found.The properties of self-made emulsion are better, especially in the aspect of water absorption height, calcium carbonate, silicon dioxide and titanium dioxide are mixed with colloidal solution respectively, and silicon dioxide is more suitable for surface sizing of decorative base paper after comprehensive consideration.When the ratio of glue to pigment is 70:30, the decorative base paper has better printing performance.Comparing with sizing and pigmenting, it can be found that adding a small amount of pigments to the glue solution can improve the printing performance of paper, such as water absorption and printing color density, order reproduction, dot loss and so on.In the experiment, the permeability and specific surface area of decorative base paper were observed microscopically, and the absorption property and surface structure data of paper were obtained, and the surface morphology of paper was observed intuitively by scanning electron microscope and laser microscope.The method of surface treatment for decorative base paper was obtained by synthesizing the visual and microscopic results.
【学位授予单位】：天津科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TS761

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