Shenhua Printing Plate and Die Pad Liner: Special Anti-Oil Stain Solution for Varnish-Printed and Die-Cut Woven Paper Products

The corrugated paper pre-printing process (printing first, then die-cutting) is widely used in large-scale production scenarios such as express packaging boxes, food packaging boxes, and home appliance packaging. After pre-printing, the surface of the corrugated paper has an ink layer. During die-cutting, the ink is prone to flaking, adhering to the cushioning pad, and at the same time, the solvents in the ink can erode the conventional cushioning pad gel, causing the cushioning pad to swell, soften, and lose elasticity, thereby leading to decreased die-cutting accuracy and frequent replacement of the cushioning pad. Deephua Printing Materials has addressed the pain points of corrugated paper pre-printing and die-cutting by optimizing the material formula and creating pre-printing-specific knife plate cushioning pads, achieving resistance to ink corrosion and prevention of ink adhesion, and being suitable for large-scale pre-printing die-cutting production.

In the development of ink-resistant materials, a solvent-resistant and anti-adhesion composite rubber formula is adopted, with oil ink isolation components added to form a hidden protective film, which can effectively block the erosion of solvents in the ink and prevent the cushioning pad from swelling and softening. After testing, the cushioning pad shows no significant performance decline when immersed in common pre-printing inks (water-based inks, oil-based inks) for 48 hours, with a hardness change of ≤ 2 Shore A and an elasticity retention rate of over 93%. At the same time, the surface anti-adhesion performance of the cushioning pad is optimized by using a special anti-ink adhesion coating, reducing the adhesion of ink debris to the cushioning pad and avoiding ink adhesion-induced difficulties in waste removal and die-cutting contamination.

In terms of structure and adaptation design, considering the uneven thickness of pre-printed corrugated paper and the difference in ink layer thickness, a gradient hardness buffer structure is adopted. The surface layer is a low-friction anti-adhesion layer, and the bottom layer is a high-rebound supporting layer, ensuring uniform pressure transmission, which not only avoids ink layer wear and detachment but also ensures thorough die-cutting of corrugated paper without any connection points or burrs. The 1.8-3.0mm common thickness specifications are launched, suitable for the die-cutting needs of different types of corrugated paper (A type, B type, C type), with a thickness error controlled within ±0.04mm, ensuring consistent die-cutting accuracy across the entire sheet. After applying this solution to a large-scale express packaging enterprise, the replacement cycle of pre-printing corrugated paper die-cut cushioning pads was extended from 4 days to 18 days, the ink adhesion waste disposal problem was completely resolved, the defective rate was reduced from 6% to 0.5%, and the efficiency of large-scale production was significantly improved.