Our traditional laser marking machine (optical fiber laser marking machine, carbon dioxide laser marking machine) mainly relies on the thermal effect of the laser to burn the surface of the material to form discoloration or the surface layer of the vaporized material leaks the underlying substance to form a mark.

However, this kind of mark formed by thermal effect has great defects in the soft film packaging industry. Carbon dioxide hitting the soft film will easily lead to breakdown of the soft film and air leakage, which will affect the shelf life of food. The fiber laser does not respond to many plastic films, and the depth of focus of the fiber (only one millimeter) is easy to print unclearly when the bag shakes or warps.

The emergence of purple light solves the above problems. The UV laser marking machine uses a 355nm short-wavelength UV laser, which absorbs very well on the soft film. The principle of the ultraviolet laser marking machine is that 355nm ultraviolet light irradiates the surface coating of the soft film, causing a chemical change in the layer to produce a color change. Since the UV light only reacts with the coating, it will not penetrate the flexible film packaging.

The ultraviolet laser marking machine is a series of laser marking machines, so the principle is similar to that of the laser marking machine, which uses laser beams to mark the surface of various materials. The effect of marking is to directly break the molecular chain of the substance through the short-wavelength laser (different from the evaporation of the surface substance produced by the long-wavelength laser to expose the deep substance) so as to show the pattern and text to be etched. Due to the small focus spot and small heat-affected zone of processing, ultraviolet laser can be used for ultra-fine marking and marking of special materials. It is the choice of customers who have higher requirements for marking effect.

In addition to copper materials, ultraviolet lasers are suitable for processing a wider range of materials. Not only the beam quality is good, the focused spot is smaller, and ultra-fine marking can be realized; the application range is wider; the heat-affected area is small, no thermal effect, no material burnt problem; fast marking speed, high efficiency; stable performance of the whole machine , small size, low power consumption and other advantages.

Ultraviolet laser marking equipment, with the characteristics of laser equipment, can realize the function of online flying marking on the assembly line, mainly for shallow marking of thin and fragile items such as: photovoltaic solar glass, etc. Ultraviolet laser marking machine is a kind of product in the laser marking machine series, and it is also a newly developed laser processing technology. Because the traditional laser marking machine uses laser thermal processing technology, it has the best precision in terms of fineness. The improvement space has limited development, but the use of ultraviolet laser marking machine is a kind of cold processing, so the fineness and thermal influence are reduced to a very low level, which is a great leap forward in laser technology.

Ultraviolet laser processing becomes cold processing because the high-energy molecules of ultraviolet photons directly detach the molecules on the metal or non-metallic materials that need to be processed. However, this detachment leads to the separation of the molecules from the material. Heat, because this does not generate heat, the way of ultraviolet laser processing has become cold processing, which is the source and the difference from traditional lasers.