The easy-to-tear thread originated in Japan, where aging is more serious. In order to facilitate the elderly to tear the package, the easy-to-tear thread came into being. By scoring the film layer in the food package, consumers can easily tear the package without damaging the entire film and affecting the sealing of the food package.

The traditional marking method is flawed and the marking depth cannot be controlled. Product packaging that is too shallow is as difficult to tear, and the easy-to-tear line has no value; too deep damages the composite layer of the product packaging, and the product in the packaging is prone to deterioration.

The packaging easy tear line is a manifestation of laser flying cutting, "short line spacing cutting" flying cutting technology. The laser breaks the product packaging intermittently to form an intermittent scribe line. The laser-cut part is thin and does not penetrate, which is easy for users to tear apart. It has no effect on the safety of food packaging, and the food will not deteriorate. The part that is not laser cut retains the original packaging thickness, so that the discontinuous laser cutting machine is easier to tear and has sufficient safety.