Quasi-continuous wave laser perforation of cigarette filters: microscopic morphological analysis and forming mechanism investigation

Quasi-continuous wave laser is widely used in the field of cigarette ventilation and char reduction, and laser perforation makes cigarette filters have stable ventilation rate and ventilation and char reduction effect. In this paper, in order to investigate the morphological characteristics and forming mechanism of laser perforation of cigarette filter splicing paper, scanning electron microscope and optical microscope are used to observe the laser perforated samples of cigarette, measure and analyze the size of the small holes of laser perforation of cigarette filters, and measure the physical parameters of the perforated cigarettes, such as the ventilation rate and the suction resistance, and come up with the following conclusions: (1) the microstructure of cigarette filter splicing paper is more complicated, with strong anisotropy, different paper materials after perforation have stable ventilation rate and ventilation and coke reduction effect. Strong anisotropy, different paper material perforation after the morphology of different features, by the laser perforation equipment and the paper itself characteristics of the multiple effects, improve the quality of perforation morphology can be from the laser perforation equipment and papermaking process in two aspects; (2) ventilation holes in the optical microscope is similar to the oval inside and outside of the two holes, there is a white edge between the inside and outside of the holes, the decision to ventilate the effect of the inner holes of the area, and therefore should be made to make the white edge As small as possible, under the premise of ensuring the ventilation performance of cigarettes as far as possible not to affect the appearance of the quality of cigarettes; (3) the filter receiving paper in the perforation there is a "side hole" phenomenon, "side hole" of the morphology of the normal holes with a certain degree of difference, which will have a certain effect on the ventilation effect of the filter of cigarettes. This will have a certain effect on the ventilation effect of cigarette filters. (4) Comparison of the physical property test results of the perforated samples with the results of optical microscope observation shows that there is a correlation between the ventilation rate of cigarettes and the area of the ventilation holes, and the measured ventilation rate and total ventilation rate of cigarette filters and the measured area of the ventilation holes conform to the quadratic curves.