Paper Cup printing requirements

The printability of paper cups

1.1 the surface of paper cups should have a certain surface strength (wax stick value ≥14A) to prevent the appearance of hair and powder loss in printing; At the same time must have a good surface fineness to meet the uniformity of printing ink. 1.2 surface treatment before printing. The surface of the base paper or substrate to be printed shall be clean, dry, flat, dust-free and oil-free, for non-polar, dense and smooth PE and other materials, the surface tension is low, only 29 ~ 31mN? M-1, but also prior corona treatment, so that its surface state changes, surface tension increased to 40 mn? M-1,38 mn minimum? M-1, so that printing ink to achieve a certain degree of fastness.

2, Paper Cup printing ink requirements for paper cup printing ink requirements of printing fastness to be good, printing products have good acid, alkali, water, heat and light resistance, the effect of these factors will not occur because of fading, discoloration, shedding phenomenon; and printing to have a good scratch and gloss, semi-extinction and extinction. Paper Cup printing technology (in addition to general printing technology)1, ink components: ink components must comply with the food hygiene law and the corresponding food packaging health standards. 2, residual solvent: control the amount of residual solvent to be small, in order to prevent the smell of printing, printing on the back of dirty, solvent adhesion to the substrate or substrate at the sealing place, will cause poor heat sealing, the formation of poor adhesion at the sealing or due to poor adhesion of the roll mouth of the phenomenon.

On the one hand, the whole society advocates cleaner production, and requires that the whole life cycle of products should be energy-saving, consumption reduction, pollution reduction, efficiency enhancement measures; On the other hand, in order to meet the needs of green packaging, packaging product safety, health, environmental protection has a good adaptability, can save resources. The production and use of paper cups coincides with the National Environmental Protection Policy, using paper cups instead of disposable plastic cups to reduce“White pollution”, the convenience and health of paper cups cheap is the key to replace other utensils widely occupy the market. The paper cup is divided into cold drink cup and hot drink cup according to its use. The material of the paper cup must meet the requirements of its packaging and processing properties as well as its printing adaptability. But in the printing technology many factors also must satisfy the paper cup processing hot sealing condition.