手提纸袋看上去制作简单，但是当中也其实有不少讲究。今天就让济南手提袋印刷厂家为大家分享一下出现薄纸手提袋印刷收缩问题的方法。

Handheld paper bags look simple to make, but there are many particular things about them. Today, let Jinan handbag printing factory share the solution to the shrinkage problem of tissue handbag printing.

随着市场经济高速发民，为了提高生产效率，现在的柔性版手提袋印刷机很注重提高烘干能力。一般都采用自然风、热风及红外线等多种烘干方式。有的组合机械设备有两组紫外光固化系统。

With the rapid development of the market economy, in order to improve the production efficiency, the current flexographic bag printing presses pay much attention to improving the drying capacity. Natural air, hot air, infrared ray and other drying methods are generally adopted. Some combined mechanical equipment has two sets of UV curing systems.

这样，在打样或生产中就会发现一种现象，即同一套胶片制成的一套版，横向尺寸竟会有偏差，误差小时不足1毫米；误差大时有2毫米-3毫米。在实际生产中，如果胶片或印版毫无问题，则横向尺寸的偏差是由于印湿和烘干两个相反作用过程造成的。

In this way, a phenomenon will be found in proofing or production, that is, a set of plates made of the same set of film has a deviation in the horizontal size, and the error is less than 1mm; When the error is large, it is 2mm - 3mm. In actual production, if there is no problem with the film or printing plate, the deviation of the transverse size is caused by the opposite process of wet printing and drying.

水性油墨中约50%的成分是水，那么，对于薄纸来说，如果大面积印刷水性墨，纸张表面印湿会发生膨胀而变宽，印刷面积越大，网纹辊线数越低，变宽的现象越明显。而印刷后进行烘干时，纸张因缩水而变窄，加热量越大，水分挥发越多，则纸张宽度变窄变得越厉害。

About 50% of water-based ink is water. For thin paper, if water-based ink is printed in a large area, the paper surface will expand and become wider. The larger the printing area, the lower the number of anilox rolls, and the wider the phenomenon is. When drying after printing, the paper becomes narrower due to shrinkage. The greater the heating amount, the more moisture volatilizes, and the narrower the paper becomes.

大多数柔印机的加热烘干系统（包括紫外光固化系统）都有一个低速度启动工作点，如20米/分。为起见，低于这个速度值时，红外线和紫外线烘干装置都不开；达到或高于这个数值才会打开。如果开机速度稍高于这个速度值，则纸张的加热量很大，收缩很明显。

The heating and drying system (including UV curing system) of most flexographic printing machines has a low speed starting point, such as 20m/min. For safety, when the speed is lower than this value, the infrared and ultraviolet drying devices are not turned on; Only when this value is reached or higher will it be opened. If the startup speed is slightly higher than this speed value, the paper will have a large amount of heating and obvious shrinkage.

相距越远的单元，横向套印误差就越大。所以在印刷生产过程中，应尽量提高手提袋印刷机速度并尽量减少不必要的热风和红外线烘干，从而避免出现横向套印误差。另外，在一次印刷过程中，适宜地提高机器速度，同样也会发生套印误差。张力、机械速度和温度具有一个恒定值，常常是1：1.2（1.3）：1。

The farther the cells are, the greater the horizontal overprint error. Therefore, in the printing production process, we should try to improve the speed of the handbag printing machine and reduce unnecessary hot air and infrared drying, so as to avoid horizontal overprint error. In addition, in a printing process, if the machine speed is appropriately increased, overprint errors will also occur. Tension, mechanical speed and temperature have a constant value, usually 1:1.2 (1.3): 1.

出现手提袋印刷收缩问题的方法就介绍到这，大家看懂了吗？如果您有得地方没理解明白，欢迎来我们网站http://www.xinfengyinshua.cn进行咨询了解吧！

Here is the solution to the problem of handbag printing shrinkage. Do you understand? If you don't understand something, welcome to our website http://www.xinfengyinshua.cn Consult and understand!