Flexible packaging process, it all!

A, flexible packaging process flow and process introduction 1, technological process: printing & rarr; Composite & rarr; Cutting & rarr; Bag making, printing process introduced (2 Gravure printing) Rolling device: production, printing materials via release into the printing device, on the surface of the plate printing ink scraper scrape, outlets within the ink in the printing material is pressed under the contact when transferred to the printing material, then into the oven, ink solvent composition of evaporate within the oven heating, blowing. After printing film out of the oven after cooling roller, cool setting. In multicolor printing, computer automatic overprint overprint control of all kinds. After the completion of the printing, the printing quality winding winding device called roll film. Composite: two or more materials together, forming the integration of the material. Composite materials can keep the excellent characteristics of single layer material, can overcome the defect of their respective, composite after have new features, meet the different requirements for composite material goods such as food. Cutting: cutting is the composite has good composite film or don't need a composite printing membrane process of cutting for the required width. Production, slitting rolling device via release materials, by a photoelectric control system control of the longitudinal cutting material device, marching to keep cutting product cutter location must be. The winding device cutting and winding roll said membrane. Cutting to taste some of the roll film finished product to the customer's automatic packaging machine use, some for semi-finished products into the next process of bag making for crossing their machine material. Bag making: according to the customer request the composite film heat sealing bags of technology, the composite membrane lining must be a heat sealing performance of the film. Second, intaglio printing with raw material 1, the original film: including BOPP, PVC, KOP, CPP, aluminum foil, etc. Used in color printing substrate to copy pattern. 2, printing ink, the printing material on the formation of a durable color images. 3, solvents, solvent is an important part of gravure printing ink, the ink is the role of soluble resin, ink suitable, given the liquidity and viscosity, adjust the printing ink drying speed, in the process of wet was printed film surface, improve its absorption, thereby enhance the printing ink adhesion and film. Also called copper plate, copper plate: gravure roller, is made of copper metal material processing and become a kind of very bright and clean the surface of the cylindrical plate. Gravure roller is used to transfer on the original text and image to be printed on the material of the main tools. Three, the structure and function of the printing press and use scope 1, gravure printing rolling device structure and function: put the printing film, provide materials needed for printing scale. Printing equipment: the ink system, scraper, embossing roller, plate. Drying device: to transfer to the printing material on the wet to dry ink, the ink in the solvent volatilize, adjust the size of the blower, exhaust air, temperature, drying ability. Winding device: the printing quality winding roll shape after printing. Tension control: for printing overprint accurate and quality requirement for the stability of the tension, production control after feeding, pre-press, printing, tension in the receiving and middle printing materials. Overprint control: in printing overprint deviation adjustment and correction, to ensure that the printing overprint accurate. 2, press the applicable range of different specifications of the printing press, mainly includes the effective width of printing, version roller circumferential range, the largest printing speed and version of the roll length range. Four, basic operation 1, test on the printing film corona value 2, 3, the material 4, install the roller 5, remove the roller 6 installed, plate 7, remove the plate 8, scraper, five, printing ink viscosity measurement process 1, preparation, printing materials, 2, 3, adjust the deployment of ink scraper, scraper Angle in 60 ~ 65 & deg; Can, under the condition of the ink scraper with minimal squeegee pressure. 4, roller pressure: the pressure setting should be in complete the ink to print to use minimum pressure. 5, drying temperature, drying temperature to consider the temperature resistance of printed materials, printing speed, area and the ink layer thickness, solvent volatility and cooperate with blowing wind, etc. 6, material tension: according to the tensile strength of material, thickness, etc. 7, ink viscosity: pay attention to in a solvent to add while stirring, not to join a large amount of solvent, lest adjustable too low and cause the ink viscosity partial separation phenomenon. Six, self-inspection of printing process quality, 1, 2, raw material surface tension plate quality, 3, 4, printing ink raw material appearance without precipitation, such as integrated block 5, solvent separation, no impurities such as six, seven, print quality printing product quality 1, overprint error: main parts & le; 0. 2 mm, minor parts & le; 0. Main part 5 mm, finger painting reaction on the surface of the subject parts, such as design, text. 2, print color: same as the customer confirmed the color sample, ink evenly. 3, design text: requirements are clear and complete is not damaged, not deformation, imprinted edge is bright and clean. 4, shallow layers: soft layers, points clear. 5, printing quality appearance: no misting, fog version, chalk line, dirt. 6, printing fastness, requires transparent tape pull the ink discoloration. Eight, safety operation and fire prevention measures 1, 2, 3 equipment safety, fire safety measures