The vacuum packaging film printing requirements

Vacuum packaging film materials is generally BOPA/PE, printing process selection is intaglio printing. 1. Specific ink type ink type specified by the process of production, such as mentioned earlier, some of other ink is not suitable for vacuum packaging film BOPA / / PE printing. 2. When reusing old ink needs to add more than 50% of the new ink, metamorphic ink shall not be used. 3. When necessary, can be a percentage of the curing agent is added in the white ink adding a certain proportion of white ink curing agent has two: the purpose of it is to improve the heat resistance of vacuum packaging film printing ink; The second is to offset printing ink resin group on curing agent consumption, avoid rubber curing incomplete phenomenon in summer. Join method: first diluted with solvent and then slowly juggle stirring edge to add to the ink, until blended. Error method: direct curing agent in printing ink, plate, or join a ink that will blend uneven, but don't add the effect of curing agent. In addition, but also pay attention to the timeliness: join the timeliness generally for 12 hours, overnight ink curing agent has failed, or reuse should be adding a certain amount of curing agent. 4. Nylon membrane absorption of moisture, moisture management nylon is easy to appear when printed falbala, swing, stripes, coloring, badly aligned wait for a phenomenon. When printing is best can control the temperature and humidity of the production workshop, when production workshop humidity is over 80%, the nylon membrane is easy to absorb damp, plexus and cause a series of printing quality problems. Specific problems should pay attention to the following aspects: (1) don't early to open the packing before use. (2) an exhausted, as far as possible more than the rest of the film with good barrier property material package. (3) the first color when printing group version roller, carries on the preliminary drying. (4) to ensure production workshop reasonable temperature ( 25℃± 2℃） And humidity ( ≤ 80% rh) 。 (5) good moistureproof film packaging printed nylon membrane application.