Plastic flexible packaging gravure quality requirements

Gravure is the plastic flexible packaging film printing printing method, gravure plastic flexible packaging film product quality request is higher, its printing appearance quality standards are as follows: ( 1) After flowers process, various pattern alignment error is not greater than zero. 3mm。 （ 2) Check the specifications of the film, the industry alignment error is not greater than zero. 3mm。 （ 3) Check the plastic flexible packaging printing ink products, to ensure proper color, bright, uniform, inky brightness, inky soft, imprinting edge is bright and clean. （ 4) The ink printing fastness, requires transparent tape pull decoloring. （ 5) Design text line, requirements are clear and complete is not incomplete, no deformation. （ 6) Checkered requirement level, points clear. （ 7) Products and tidy, no obvious smudgy, knife. （ 8) Plastic flexible packaging products and of the same batch and same color density deviation indexes accord with GB7707 - every character 87 requirements. The process of all kinds of plastic packaging film base material: (1) base material BOPP is the most commonly used 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 PET printing point: for PET usually thin, easy corrugate, need larger tension when printing, the printing ink has certain selectivity, with general printing ink abscission, membrane electrostatic, prone to blocking version ( Don't surf the Internet) , burr and scraping knife ( Knife silk) Phenomenon, when printing workshop humidity is good. (3) PA printing point: PA is easy absorption of moisture deformation of thin film. So must ensure that the printer when printing environment humidity cannot too high ( If there is no dehumidifying measures is not suitable for printing nylon membrane humidity environment) ； Not printing film of aluminum film cannot destroy its original packaging film, kaifeng immediately after printing, the printing need to preheat the nylon membrane ( If the machine without preheating device, plate can be installed in the second after color, empty out the first color for preheating) , the 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 product must be sealed packaging, into the dry after curing indoor storage, and composite as soon as possible.