Must keep in mind the key points of 6 kinds of flexible packaging common film base material printing | | food industry information packaging manufacturers

In flexible packaging factory work, 6 kinds of common flexible packaging printing points must master film base material, we study together next below: 1. Base material BOPP is the most commonly used flexible packaging printing, the production technology is a typical plastic gravure process; Choose polyamide or chlorinated polypropylene ink printing, the appropriate tension and stamping force, control the drying temperature below 80 ℃. 2. BOPET printing point: for PET usually thin, easy to fold, printing require larger tension, have certain selectivity to ink, with general printing ink abscission, membrane electrostatic, prone to blocking version, burr and scraping knife phenomenon, when printing workshop humidity is good. 3. Points: BOPA run -- BOPA is easy absorption of moisture deformation of flexible packaging film. So must ensure that the printer when printing environment humidity cannot too high; Not printing film of aluminum film cannot destroy its original packaging film, kaifeng immediately after printing, the printing requires preheating of nylon membrane, preheating temperature is 50 ~ 80 ℃; Printing tension due to lower; Pressure to moderate; Ink, strong adaptability, depending on the different product structure choice, if it is cooking bags must choose cooking ink; After the printing flexible packaging products must be sealed packaging, into dry after curing indoor storage, and composite as soon as possible. 4. K coating membrane ( 小山,KPA, KPET) Printing points: because K coating film roller coating and spraying type, its thickness uniformity is not very good, the surface is not smooth, and PVDC just and more brittle than in a printing press tension and stamping pressure can't be too big, difficult to overprint, ink metastatic is poorer, when printing light screen is easy to take, with the higher hardness of roller printing. In addition, the selective solvent, improper use of solvent coating could be dissolved, printing membrane solvent residual amount is larger, and easy adhesion, so the drying and cooling needs special attention. The printing of extinction membrane can use OPP process in its smooth surface printing, but due to its extinction layer on the surface of the can't bear high temperature, the need to control the drying temperature. 5. Pearly membrane using tables printing ink to printing, printing ink transparency and try to choose a good table. Heat shrinkable film should be used when printing the drying temperature is very low, choose a thermal contraction of special ink, if it is PVC heat shrinkable film also consider solvent on solubility of the thin films. 6. PP, PE&mdash undrawn; — Flexible packaging film printing tension is small, the overprint is difficult, sample design should fully consider their deformation.