Shenhua Printing Material Knife Plate Anti-Skating Pad: Special Anti-Scald and Anti-Detachment Solution for Thermal-sensitive Non-Aqueous Adhesive Die-cutting

Thermal-sensitive self-adhesive labels combine the characteristics of thermal-sensitive paper and self-adhesive materials, and are widely used in price tags, courier thermal labels, food thermal stickers, etc. During the die-cutting process, they face two major challenges: first, the thermal-sensitive coating is prone to heat-induced scalding and color change due to friction; second, the self-adhesive material is likely to stick to the cushion pad, causing the release layer to fall off. The conventional cushion pads have poor heat dissipation performance and insufficient anti-sticking properties, making it difficult to balance both aspects, resulting in a high rate of defective products. Deephua Printing Materials focuses on the challenges of thermal-sensitive self-adhesive label die-cutting and has developed dedicated knife plate cushion pads to achieve "anti-scalding, anti-detachment, and high precision" triple effects.

In terms of material optimization, they use low-temperature, anti-friction, anti-sticking materials, add efficient heat dissipation components and anti-detachment additives, and control the die-cutting friction-generated temperature within 38°C, which is much lower than the scalding temperature of the thermal-sensitive coating. This effectively eliminates scalding and color change from the source. The surface adopts a special anti-sticking coating, with a friction coefficient of less than 0.05, which not only solves the problem of the self-adhesive material sticking to the cushion pad but also avoids damage to the release layer due to friction, ensuring that the adhesion of the self-adhesive material is not affected. The optimized material rebound performance reaches over 97%, with a compression permanent deformation rate of ≤3%. With a gentle and uniform buffering pressure, it avoids label tearing and detachment caused by excessive pressure.

In terms of structure and process design, considering the thin and stretchable characteristics of thermal-sensitive self-adhesive labels, they have launched ultra-thin high-precision cushion pads ranging from 0.4 to 0.9mm in thickness, with a thickness error controlled within ±0.01mm, ensuring uniform pressure across the entire sheet and avoiding label stretching and deformation. They adopt a low-temperature precision cutting process, with no burrs or sharp edges on the edge of the cushion pad, precise alignment with the knife plate, and eliminating missed cuts or multiple cuts that cause edge burrs. Surface additional heat dissipation and drainage patterns are added to quickly conduct trace amounts of heat and guide waste materials to be quickly discharged, improving production efficiency. After a supermarket price tag printing factory applied this solution, the scalding rate of thermal-sensitive self-adhesive labels during die-cutting dropped from 9% to 0.1%, the rate of detached defective products dropped to 0.08%, the clarity of the label characters met the standard rate of 100%, and perfectly met the die-cutting requirements of thermal-sensitive self-adhesive labels.