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深圳印刷包裝廠平版印刷使用的潤版液分為幾類?各類潤版液的特點是什麽

From:Buke printing factory of China步殼印刷 | Author:China Bukeprinting factorybook0755 | Published time: 2020-07-10 | 528 Views | 🔊 Click to read aloud ❚❚ | Share:
深圳印刷包裝廠平版印刷使用的潤版液可以分為普通潤版液、酒精潤版液、非離子錶面活性劑潤版液三類。
深圳印刷包裝廠平版印刷使用的潤版液分為幾類?各類潤版液的特點是什麽?

深圳印刷包裝廠

深圳印刷包裝廠平版印刷使用的潤版液可以分為普通潤版液、酒精潤版液、非離子錶面活性劑潤版液三類。

(1)普通潤版液中所含有的物質基本都是非錶面活性劑物質,這些物質加到水中後,不會使水的錶面張力下降,反而會使錶面張力略有提高,因而這類潤版液的用量大,在版面上的液膜也比較厚。過多的水分粘到印版上,會使紙張變形、起皺,給產品質量帶來一定的危害,所以這類潤版液已逐漸被淘汰。

(2)酒精潤版液的主要成分是乙醇,它是一種錶面活性物質,可以降低溶液的錶面張力,能在它揮發的同時,帶走大量的熱,使版面的溫度降低,減少版面粘臟。

(3)非離子錶面活性劑潤版液,一般是把非離子錶面活性劑加入含有其他電解物質的潤版液中配製而成的。親水基主要是由一定數量的含氧基團構成的,不會和潤版液中的其他電解質發生化學反應而產生沉澱,穩定性能比較好,活性劑能使潤版液錶面張力降低,潤濕性能好,因此還能減少潤版液的用量,但是錶面張力的降低,在某種程度上使潤版液與油墨之間的界面張力也有所降低它們與油墨的乳化能力一般比普通的潤版液高,因此要嚴格控制非離子錶面活性劑的濃度。
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