Relationship between material and quality of special shaped bag
The bags need to be odorless. The bag with peculiar smell generally makes people feel that it does not meet the hygienic standard, and may affect the normal use of the bag. If there is no odor, it is necessary to check the transparency of the bag, whether the clarity is uniform, whether there is impurity feeling, etc. ?
Packaging material knowledge: ink drying is not good in soft package printing
The poor drying of ink is one of the reasons for the adhesion on the opposite side of printed matter, and the phenomenon is obvious. Poor ink drying mainly includes two aspects: one is the drying speed of ink is too slow; the other is ink false drying, that is, the ink surface has been dry, but the ink interior has not been completely dried.
The volatile drying ink is generally used in plastic soft special-shaped bag packaging printing. The ink drying is realized by solvent evaporation. Therefore, the speed of solvent evaporation is an important factor to determine the ink layer drying and affect the printing quality. The slower the solvent volatilization, the better the level reproducibility of the printed matter, the more bright and beautiful the color is, but it is prone to adhesion; the faster the solvent volatilizes, the ink is easy to dry, but if the volatilization is too fast, the printed matter will turn white. Therefore, it is the key to choose the solvent with appropriate volatilization speed.
In the drying analysis and identification of printed matter, you can touch the ink position by hand. If the imprint is not dry, it means that the drying speed of the ink is too slow. You can adjust the ink by changing the dilution solvent with fast volatilization speed, and speed up the ink drying by increasing the hot air temperature and increasing the amount of hot air. If the surface of the ink is dry, but the drying is not complete, it indicates that the ink is false dry. It is necessary to adjust the solvent ratio, reduce the content of fast drying solvent, appropriately increase the content of solvent with slow drying speed in the special-shaped bag, and increase the hot air temperature and the amount of hot air to ensure the ink layer on the printed matter is completely dried. http://www.dgbpk.com/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag