Shenhua Printing Materials Knife Plate Spring Pad: Technical Details Analysis of Adhesive Backing Adhesion and Edge Processing

In die-cutting operations, apart from the core resilience performance, the adhesive durability of the backing and the cutting process at the edges of the knife plate spring pad are often the "invisible keys" that determine the actual user experience. Shenhua Printing Materials has made in-depth optimizations in these two technical details to address the common pain points in the industry such as "pad detachment" and "glue seepage".

In terms of adhesive backing technology, ordinary spring pads often shift or even fall off and get entangled in the machine during die-cutting due to the decline in adhesive backing viscosity or the influence of high temperatures, causing accidents. Shenhua Printing Materials uses imported high-strength double-sided tape, which has undergone special anti-aging and high-temperature resistance treatments. This adhesive backing system can still maintain stable initial adhesion and holding force in the high-temperature environment generated by the continuous operation of the die-cutting machine (usually between 50℃ and 70℃), ensuring that the elastic pad firmly adheres to the bottom of the knife plate. Meanwhile, in order to adapt to different types of knife plates (such as wood and metal), Shenhua Printing Materials offers back adhesive options with various adhesive grades to meet diverse bonding needs. Moreover, after removal, there is no residue left, which is convenient for cleaning and reusing the knife plates.

In terms of edge processing, traditional elastic pads often use laser cutting or ordinary mechanical cutting, which is prone to burrs or the separation of the edge adhesive layer from the adhesive, resulting in the accumulation of paper scraps or delamination of the elastic pad during die-cutting. Shenhua Printing Materials has introduced a high-precision cryogenic cutting process. By using low temperatures to harden the material, it achieves absolute flatness and verticality at the edges, eliminating the formation of burrs. This precise edge treatment makes the spring pad more closely adhere to the knife line, effectively reducing the paper accumulation problem caused by edge gaps and further ensuring the smoothness of die-cutting.