手提紙袋看上去制作簡(jiǎn)單，但是當(dāng)中也其實(shí)有不少講究。今天就讓濟(jì)南手提袋印刷廠家為大家分享一下出現(xiàn)薄紙手提袋印刷收縮問(wèn)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(chǎng)經(jīng)濟(jì)高速發(fā)民，為了提高生產(chǎn)效率，現(xiàn)在的柔性版手提袋印刷機(jī)很注重提高烘干能力。一般都采用自然風(fēng)、熱風(fēng)及紅外線等多種烘干方式。有的組合機(jī)械設(shè)備有兩組紫外光固化系統(tǒng)。

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(chǎn)中就會(huì)發(fā)現(xiàn)一種現(xiàn)象，即同一套膠片制成的一套版，橫向尺寸竟會(huì)有偏差，誤差小時(shí)不足1毫米；誤差大時(shí)有2毫米-3毫米。在實(shí)際生產(chǎn)中，如果膠片或印版毫無(wú)問(wèn)題，則橫向尺寸的偏差是由于印濕和烘干兩個(gè)相反作用過(guò)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(duì)于薄紙來(lái)說(shuō)，如果大面積印刷水性墨，紙張表面印濕會(huì)發(fā)生膨脹而變寬，印刷面積越大，網(wǎng)紋輥線數(shù)越低，變寬的現(xiàn)象越明顯。而印刷后進(jìn)行烘干時(shí)，紙張因縮水而變窄，加熱量越大，水分揮發(fā)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(shù)柔印機(jī)的加熱烘干系統(tǒng)（包括紫外光固化系統(tǒng)）都有一個(gè)低速度啟動(dòng)工作點(diǎn)，如20米/分。為起見，低于這個(gè)速度值時(shí)，紅外線和紫外線烘干裝置都不開；達(dá)到或高于這個(gè)數(shù)值才會(huì)打開。如果開機(jī)速度稍高于這個(gè)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(yuǎn)的單元，橫向套印誤差就越大。所以在印刷生產(chǎn)過(guò)程中，應(yīng)盡量提高手提袋印刷機(jī)速度并盡量減少不必要的熱風(fēng)和紅外線烘干，從而避免出現(xiàn)橫向套印誤差。另外，在一次印刷過(guò)程中，適宜地提高機(jī)器速度，同樣也會(huì)發(fā)生套印誤差。張力、機(jī)械速度和溫度具有一個(gè)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(xiàn)手提袋印刷收縮問(wèn)題的方法就介紹到這，大家看懂了嗎？如果您有得地方?jīng)]理解明白，歡迎來(lái)我們網(wǎng)站http://775828.cn進(jìn)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://775828.cn Consult and understand!