手提紙袋看上去制作簡單，但是當中也其實有不少講究。今天就讓濟南手提袋印刷廠家為大家分享一下出現薄紙手提袋印刷收縮問題的方法。

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.

隨著市場經濟高速發民，為了提高生產效率，現在的柔性版手提袋印刷機很注重提高烘干能力。一般都采用自然風、熱風及紅外線等多種烘干方式。有的組合機械設備有兩組紫外光固化系統。

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.

這樣，在打樣或生產中就會發現一種現象，即同一套膠片制成的一套版，橫向尺寸竟會有偏差，誤差小時不足1毫米；誤差大時有2毫米-3毫米。在實際生產中，如果膠片或印版毫無問題，則橫向尺寸的偏差是由于印濕和烘干兩個相反作用過程造成的。

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.

水性油墨中約50%的成分是水，那么，對于薄紙來說，如果大面積印刷水性墨，紙張表面印濕會發生膨脹而變寬，印刷面積越大，網紋輥線數越低，變寬的現象越明顯。而印刷后進行烘干時，紙張因縮水而變窄，加熱量越大，水分揮發越多，則紙張寬度變窄變得越厲害。

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.

大多數柔印機的加熱烘干系統（包括紫外光固化系統）都有一個低速度啟動工作點，如20米/分。為起見，低于這個速度值時，紅外線和紫外線烘干裝置都不開；達到或高于這個數值才會打開。如果開機速度稍高于這個速度值，則紙張的加熱量很大，收縮很明顯。

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.

相距越遠的單元，橫向套印誤差就越大。所以在印刷生產過程中，應盡量提高手提袋印刷機速度并盡量減少不必要的熱風和紅外線烘干，從而避免出現橫向套印誤差。另外，在一次印刷過程中，適宜地提高機器速度，同樣也會發生套印誤差。張力、機械速度和溫度具有一個恒定值，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.

出現手提袋印刷收縮問題的方法就介紹到這，大家看懂了嗎？如果您有得地方沒理解明白，歡迎來我們網站http://www.ydhb120.com進行咨詢了解吧！

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.ydhb120.com Consult and understand!