【作者】 董彦博；

【导师】 李培金；

【作者基本信息】 北京化工大学 ， 材料加工工程， 2007， 硕士

【摘要】 水转印技术是利用水的压力将油墨印于承载材料的一种印刷方式，而水转印膜是在水转移印刷中用于承载油墨，与液面接触进行转移印刷的一层水溶性薄膜，其性能的好坏直接影响到水转印的质量。本文以聚乙烯醇1788(PVA)作为原料，以丙三醇为增塑剂，加入不同的表面活性剂分别测试其性能，发现加入表面活性剂后，水转印PVA膜在水中都不会卷曲，但随着所选的表面活性剂的HLB值的增大，膜在水中的性能会下降，表现为，水上伸展时间变小，溶解时间变小，水上的伸长率变大，而在选用甘油醚为表面活性剂的时候，膜的性能最佳。另外，以聚乙烯醇1788(PVA)作为原料，以丙三醇为增塑剂，甘油醚为表面活性剂的条件下，对其中加入0％-2.5％的淀粉，对水转印PVA膜进行了改性研究。实验结果表明，加入淀粉后，PVA溶液的粘度增大，膜的溶解时间变长，水上伸长率变小，含水率变小，扯断强度增强，形变缩小；通过膜表面观察，发现淀粉在膜中以聚集颗粒状态存在。研究发现在淀粉加入PVA后使水转印膜在水中水溶性得到很大改善。然后对所加入的淀粉采用超声波振荡的方法，进行加工，使淀粉在PVA膜中更加的分散，得到的水转印膜的溶解时间变长，水上伸长率变小，含水率变小，扯断强度增强，形变缩小，淀粉颗粒在PVA膜中更加的分散，与国外先进的水转印膜的性能相差不大。同时确立了一个完整的配方和良好的加工工艺更多还原

【Abstract】 Water transfer printing technique is a printing mode that using the water pressure, print the ink to materials. The water transfer printing sheet is a solubility sheet in the water transfer printing, which loads the ink and connects the water surface. Its capability is very important for the quality of the water transfer printing. With the polyvinyl alcohol 1788 (PVA) as main raw material and glycerin as plasticizer, in this paper the modification of water transfer PVA sheet was investigated through the addition of the different surfactant, the sheet is not curled, however with the increase of HLB number, the capability of the PVA sheet in the water decreased. It could be indicated from the result that the extending time and dissolving time of sheet in the water got shorter, and the elongation in water was bigger.Otherwise, with the polyvinyl alcohol 1788 (PVA) as main raw material, glycerin as plasticizer and glycerin ether as surfactant ,through the addition of 0%-2.5% starch, it could be indicated from the result that after the adding of starch to the sheet, the viscosity of the PVA solution increased, the dissolution time of the sheet got longer, the elongation in water was smaller, the rate of moisture became smaller, tensile strength enhanced and the change of shape diminished; also it could be seen from the surface of sheet that the starch existed in PVA sheet as the shape of conglomerating particle. Though research, it has been found that the water solubility of water transfer sheet has bccn improved obviously, after adding the starch to the PVA sheet.Then using the way of ultrasonic scattering, the starch is processed and can be scattered in the PVA sheet better. After processed by ultrasonic shaking, the performance of the sheet improved. The dissolution time of the sheet got longer, the elongation in water was smaller, the rate of moisture became smaller, tensile strength enhanced and the change of shape diminished, and in the sheet the starch is scattered better. The performance of the sheet is not obviously different with the foreign advanced water transfer sheet. Finally the whole direction and process technique is established.更多还原