Shenhua Printing Plate and Die Pad: High-strength Composite Paperboard Cutting Specialized High Support and Anti-Damage Scheme

Thick composite paperboard (such as three-layer composite corrugated paper, reinforced cardboard composite board, honeycomb composite paperboard) is widely used in heavy-duty packaging, home appliance packaging, and large equipment packaging boxes. It has a large thickness, high hardness, and complex structure. The core pain point during die-cutting is local crushing, inability to cut through, and edge cracking. The conventional elastic pads have insufficient supporting force and uneven pressure transmission, which can lead to die-cutting accuracy deviations, reduction in packaging structure strength, and difficulty in meeting the die-cutting requirements of thick composite paperboard. Deephua Printing Materials focuses on the pain points of thick composite paperboard and develops high-supporting special knife pad. Through high-strength and balanced pressure design, it achieves efficient die-cutting of thick materials.

In terms of material research, a high-hardness and high-supporting composite rubber formula is adopted, with high-strength reinforcing components added, raising the surface hardness of the pad to Shore A 70-75, with a supporting strength 60% higher than that of conventional pads. This can effectively resist the die-cutting pressure of thick composite paperboard and prevent local crushing; optimizing the material's toughness and rebound performance, with a rebound rate of over 93%, and a compression permanent deformation rate of ≤5%, ensuring uniform pressure transmission and achieving complete cutting of thick paperboard without any connection points or edge cracking; adding wear-resistant components to enhance the pad's surface wear resistance and extend its service life.

In terms of structure and adaptation design, a "rigid support + flexible cushion" double-layer structure is adopted. The bottom layer is a high-hardness supporting layer, providing sufficient support force; the top layer is a low-hardness cushion layer, buffering the die-cut impact and avoiding edge cracking of the paperboard; launching 2.5-4.0mm thick pads, suitable for die-cutting requirements of different thicknesses (1.0-3.0mm) of thick composite paperboard, with thickness error controlled within ±0.04mm, ensuring uniform pressure across the entire sheet; the edge of the pad is treated with thickening sealing, enhancing edge support and avoiding edge damage caused by frequent die-cutting. After a large-scale home appliance packaging enterprise applied this solution, the crushing rate of thick composite paperboard during die-cutting dropped from 10% to 0.4%, the rate of non-cuttable defective products dropped to 0.3%, the compliance rate of packaging structure strength reached 100%, and production efficiency increased by 28%.