论文部分内容阅读
将帘式涂布技术由特种纸领域转向普通纸应用,具有巨大的经济、工艺和质量效益。尽管在世界范围进行了广泛的研究,但帘式涂布仍未能在大型的高速纸机上得到工业应用。其主要问题是高速下幕帘的不稳定性,如涂布时气流层沿着纸幅移动,破坏幕帘,使涂层开裂。为解决此问题,开发除气系统以及能提高涂料弹性的化学品,使涂料在车速达到1000m/min时,接触纸幅后也能良好拉伸;精确控制操作参数,即增加幕帘高度,获得最佳降落速度。
The curtain coating technology from specialty paper to plain paper applications, with great economic, technological and quality benefits. Despite extensive research worldwide, curtain coating has not been able to achieve industrial applications on large high-speed paper machines. The main problem is the instability of curtains at high speeds, such as when the air layer is moving along the web during coating, breaking curtains and cracking the coating. In order to solve this problem, the development of degassing systems and chemicals that increase the flexibility of the coating allows the coating to stretch well after reaching the web at a vehicle speed of 1000 m / min. Precise control of the operating parameters, ie increasing the height of the curtain, The best landing speed.