【摘要】：熱敏記錄紙作為一類信息記錄材料,具有打印裝置小巧靈活、打印耗材單一便宜、打印操作簡單方便、打印過程安靜快速、打印產品精細清晰等特點,在傳真通信、醫(yī)學成像、金融票據(jù)、物流標簽等領域得到了廣泛的使用。但熱敏紙圖像穩(wěn)定性差的特點對其應用也有著眾多的限制,而隨著熱敏紙應用范圍的不斷拓展,對高圖像穩(wěn)定性的防護型熱敏紙的需求也越發(fā)強烈。針對普通熱敏紙發(fā)色及防護性能,首次提出了通過求取飽和光密度值“變異系數(shù)”來量化評價熱敏紙發(fā)色均勻性的方法,并用于指導熱敏涂料配方的設計優(yōu)化。通過對熱敏涂料中BON、顯色劑、隱色染料、填料等的種類和用量對熱敏紙發(fā)色和防護性能的影響的研究,結果表明采用D8s顯色劑,控制BON對發(fā)色組分的比例為1:4.2,碳酸鈣對煅燒土的比例為4.1:1時,制得的普通熱敏紙能獲得較好的打印效果和防護性能。但僅對熱敏層的配方進行優(yōu)化還遠不能滿足國標對熱敏紙防護性能的要求。頂涂層對熱敏紙的防護性能起到關鍵作用。本文設計了以苯丙乳液為主要組分的頂涂涂料,通過在熱敏紙表面涂布一層保護層的方式來改進普通熱敏紙的防護性能。頂涂涂料優(yōu)化實驗中發(fā)現(xiàn),通過加入碳酸鈣填料可以改善熱敏紙打印過程中的走行穩(wěn)定性,同時因為填料在頂涂層中的“柵欄”效應,延長了分子擴散的路徑,對頂涂后熱敏紙的防護性能也有一定提升。PDA實驗結果表明使用交聯(lián)劑能夠獲得更加致密的頂涂層,從而提升頂涂后熱敏紙的防護性能。采用氮雜環(huán)丙烷化合物和碳酸鋯銨作為交聯(lián)劑制得的頂涂熱敏紙對水、植物油和酒精的防護性能已經完全能夠滿足國標中的要求。此外,頂涂后的熱敏紙不需壓光也能獲得極高的平滑度,而通過不同交聯(lián)劑的復配使用則能實現(xiàn)對熱敏紙的印刷適性的優(yōu)化。通過TEMPO氧化法和均質處理制備了納米原纖化纖維(NFC),AFM照片顯示制得的NFC直徑在10~30nm左右。采用自然干燥的方法,通過NFC表面羥基間的氫鍵作用相互間緊密堆積從而制得致密連續(xù)的膜,對這種NFC膜的研究表明NFC膜對有機溶劑具有良好的穩(wěn)定性和抗?jié)B透性能。基于這一特性,本文首次將NFC作為保護層涂布在普通熱敏紙表面,涂布量為4g/m2。研究發(fā)現(xiàn)制得的NFC頂涂熱敏紙具有優(yōu)異的抗有機溶劑特性、運行適性和印刷適性。
[Abstract]:As a kind of information recording material, thermal recording paper is characterized by small and flexible printing device, simple and cheap printing consumables, simple and convenient printing operation, quiet and fast printing process, fine and clear printing products, etc., in facsimile communication, medical imaging, etc. Financial instruments, logistics labels and other fields have been widely used. However, the poor image stability of thermal paper has many limitations on its application, and with the continuous expansion of the application of thermal paper, the demand for high image stability protective thermal paper is becoming more and more intense. Aiming at the color and protection performance of common thermosensitive paper, the method of evaluating the color homogeneity of heat sensitive paper by calculating the "coefficient of variation" of saturated optical density is put forward for the first time, which can be used to guide the design and optimization of heat sensitive coating formulation. The effects of the types and contents of BON, cryptic dyes and fillers on the color and protective properties of thermistor paper were studied. The results showed that the proportion of BON to chromogenic component was 1: 4.2 by using D8s chromogenic agent. When the ratio of calcium carbonate to calcined soil is 4.1: 1, the general thermal sensitive paper can obtain better printing effect and protective performance. However, the formulation of thermal sensitive layer can not meet the requirements of national standards for thermal protection performance. Top coating plays a key role in the protective performance of thermal sensitive paper. In this paper, a top coating with styrene-acrylic emulsion as the main component is designed to improve the protective performance of common thermal paper by coating a protective layer on the surface of thermal paper. In the optimization experiment of top coating, it is found that adding calcium carbonate filler can improve the running stability of thermal paper during printing, and because of the "fence" effect of filler in top coating, the molecular diffusion path is prolonged. The results of PDA experiments show that a more compact top coating can be obtained by using crosslinking agent to improve the protective performance of the top coated thermistor paper. The protective properties of water, vegetable oil and alcohol prepared by using heterocyclic propane compound and ammonium zirconate as crosslinking agent can fully meet the requirements of national standard. In addition, the heat sensitive paper with top coating can obtain high smoothness without calendering, and the printing adaptability of thermal paper can be optimized by the combination of different crosslinking agents. By TEMPO oxidation and homogenization treatment, the NFC diameter of nanofibrillar fiber was about 10~30nm, which was obtained by (NFC), AFM photo display. By using natural drying method, a compact and continuous NFC film was prepared by the close accumulation of hydrogen bonds between hydroxyl groups on the surface of NFC. The study of this kind of NFC film shows that the NFC membrane has good stability and permeability to organic solvents. Based on this characteristic, NFC is first used as a protective coating on the surface of common thermal paper with a coating amount of 4 g / m ~ (2). It is found that the NFC top coated thermosensitive paper has excellent resistance to organic solvent, running adaptability and printing adaptability.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TS761

【參考文獻】

相關期刊論文 前5條

1 臺立民;韻卓;;淀粉塑化改性的機理及研究進展[J];安徽農業(yè)科學;2011年04期

2 王際德;;熱敏紙發(fā)展近況和推進建議[J];中華紙業(yè);2010年23期

3 劉映堯;陳港;唐愛民;張宏偉;王欽雯;;淺談熱敏紙的生產與技術[J];造紙科學與技術;2010年06期

4 王晟;;高鋯穩(wěn)定型碳酸鋯銨抗水劑的研究[J];化工技術與開發(fā);2007年04期

5 李輝,李友明;特種技術紙——熱敏紙[J];紙和造紙;2003年05期

相關碩士學位論文 前3條

1 任少波;熱敏微膠囊材料制備及性能研究[D];河北大學;2009年

2 史亞鵬;無甲醛交聯(lián)劑的合成及應用[D];蘇州大學;2012年

3 李叢妮;有機鋯復合交聯(lián)劑的制備及其交聯(lián)性能研究[D];西安石油大學;2011年

，

本文編號：2367094