Differences between Polypropylene Woven Bags Printing and Paper Printing

What are the differences between polypropylene woven bags printing and paper printing? The specific differences are as follows: 

1.The printing ink is different. Shenghua polypropylene woven bags printing are using a special plastic ink. Polypropylene woven bags printing has strong adhesion on the polypropylene woven bags. The print is not easy to fall off. Plain paper printing ink printed on the polypropylene woven bags would fall off easily if rubbed. The printing ink in the polypropylene woven bags dries fast and is not easy to fall off.

2.Different methods of printing. PP woven bags printing in small quantity generally print with flat screen printing. It has the advantage of being plate making convenient, flexible and can be printed by machine or by hand. Silk screen printing has a short service life, generally there is leakage every 1 ~ 20000 times print. The highest limit printing time may not more than 30000 if serves for polypropylene woven bags printing. If the quantity is large, drum metal mesh printing or offset printing rollers is available. They belong to heavy machinery with a fast speed of printing. The service life of the version is relatively longer, but the printing process of the polypropylene woven bags is relatively complicated too. Every version can be printed more than 100000 times on the polypropylene woven bags. Flat screen and metal screen printing are not suitable for color printing, generally only one or two color print, otherwise the complex registering process would have a low efficiency. Offset printing can do color printing.

3.Because of the flexible packaging printing ink, polypropylene woven bags need to be dried or have a drying process after finished. Otherwise the polypropylene woven bags would easy to adhere. Polypropylene woven bags printing technology is developing very fast. High speed printing, color printing have reached very high level.