What is the processing technology of the ventilation holes on the packaging bags?

Currently, there are only a few processing methods suitable for punching air holes in food packaging bags. Laser punching technology is now very mature and can punch holes in any material. It can solve some problems that traditional mechanical processing departments can solve.

As mentioned above, using laser to punch air holes in food packaging bags is more effective, because most food packaging bags are plastics, and they will be thermally expanded during the processing of plastics. The thermal expansion coefficient is much larger than that of metals. It will drop significantly after being heated for a long time. After being stressed at room temperature for a long time, it will deform for a long time at a lower yield strength and is very sensitive to incision damage. Therefore, special attention should be paid to the processing of products with small holes, otherwise deformation and large-area melting will occur.

The method of laser punching does not need to consider such problems. The plastic laser punching machine belongs to the non-contact processing method, which is to use the laser to heat the material as a high-intensity heat source after rapid adjustment and focusing, so that the material in the laser action area is melted or vaporized and evaporated to form holes. By focusing the lens, the laser beam is highly concentrated in time and space, and the laser energy density of the spot diameter can be reduced by 10 times the 5th power to 10 times the 15th power W/cm2. Such a high power density allows any material to be drilled with a laser. The aperture is uniform, the finish is good, there are no burrs, and there is no melt edge.