There are many varieties of films on the market today, but the most commonly used printing films are BOPP, BOPA, PET, LDPE. In terms of printing, the most important thing is of course the surface treatment effect of the film, whether the nylon film is damp, and the surface tension of each film roll should be detected during printing.
The corona effect is time-sensitive. If it is left for a long time, the corona effect may drop too much to meet the printing requirements, and it may also avoid printing failure due to accidental reversal of the film surface. In addition, after the corona pen is used for a long time, the test data is inaccurate due to the volatilization of the test liquid, and it is preferable to use the Dyne test solution mixed according to the standard to ensure the timeliness.
PE film is our main concern: there may be a film roll leaking corona treatment when blowing the film; the film thickness is too large or uneven, causing insufficient corona effect; the film is adding too much slip agent or high Excessive proportion of slip particles causes a significant decrease in corona effect. When the corona effect of the two sides of the 12μm PET film is not much different, it needs to be distinguished, otherwise the back of the printed film roll may be caused to be sticky.
General corona requirements for printed films: BOPP, PE ≥ 38 dyne, PET ≥ 50 dyne, BOPA ≥ 52 dyne. The water absorption of the nylon film has a great influence on the adhesion and composite strength of the ink. The main performance is that the printing is difficult during printing, the shallow layer of the ink layer is not well transferred, the adhesion is decreased, and when the water is too much, the outer layer of the film roll will definitely rise. Wrinkled, the surface is uneven, and the lines are created.
When purchasing the film, be sure to explain to the supplier the use and requirements of the film, such as BOFIA film, there are printing grade, composite grade, now the film variety is refined, the name of PET, BOPA, BOPP can be said, the supplier may have several The variety of grades, but not necessarily all.
There are many varieties of films on the market today, but the most commonly used printing films are BOPP, BOPA, PET, LDPE. In terms of printing, the most important thing is of course the surface treatment effect of the film, whether the nylon film is damp, and the surface tension of each film roll should be detected during printing.
The corona effect is time-sensitive. If it is left for a long time, the corona effect may drop too much to meet the printing requirements, and it may also avoid printing failure due to accidental reversal of the film surface. In addition, after the corona pen is used for a long time, the test data is inaccurate due to the volatilization of the test liquid, and it is preferable to use the Dyne test solution mixed according to the standard to ensure the timeliness.
PE film is our main concern: there may be a film roll leaking corona treatment when blowing the film; the film thickness is too large or uneven, causing insufficient corona effect; the film is adding too much slip agent or high Excessive proportion of slip particles causes a significant decrease in corona effect. When the corona effect of the two sides of the 12μm PET film is not much different, it needs to be distinguished, otherwise the back of the printed film roll may be caused to be sticky.
General corona requirements for printed films: BOPP, PE ≥ 38 dyne, PET ≥ 50 dyne, BOPA ≥ 52 dyne. The water absorption of the nylon film has a great influence on the adhesion and composite strength of the ink. The main performance is that the printing is difficult during printing, the shallow layer of the ink layer is not well transferred, the adhesion is decreased, and when the water is too much, the outer layer of the film roll will definitely rise. Wrinkled, the surface is uneven, and the lines are created.
When purchasing the film, be sure to explain to the supplier the use and requirements of the film, such as BOFIA film, there are printing grade, composite grade, now the film variety is refined, the name of PET, BOPA, BOPP can be said, the supplier may have several The variety of grades, but not necessarily all.
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