Sludge contamination, is it possible that the screen printed plate and print settings do not match? In case of mud contamination, the sieve mud is replaced together. Then I thought it was a mud problem, but what if it was a screen version problem? I experimented and found that 70% of inefficiencies are caused by screen issues. I don't think it's pollution. I define it as print quality problems caused by unqualified screen printing plates!
Are the silver paste and aluminum paste used for screen printing solar cells toxic?
The function of the scraper is to squeeze the mud into the leaking holes of the screen at a certain speed and angle. The scraper maintains a certain pressure on the screen during printing, and the blade pressure is between 10. and 10. Between 15 N/cm, excessive pressure ofthe squeegee will easily deform the screen. Printed graphics will be incompatible with screen graphics, which will also increase wear on the scraper and screen. Too little squeegee pressure will cause distortion on the printed screen. . Residual slurry is present.
The material of the scraper is generally polyurethane rubber or fluorine rubber, with hardness ranging from Shore A60° to A90°. The lower the hardness of the scraper belt, the greater the thickness of the printed graphic. the material must be resistant to grinding, the cutting edge has good linearity and maintains full contact with the screen; the scraper generally uses a diamond scraper, which has 4 cutting edges and can be used one by one, with a high utilization rate.
Does anyone know? What are the effects of printing speed, pressure and screen film thickness of solar cells on the height and width ofthe positive electrode grid?In the short term, it will not cause much harm to the human body. If you work in this environment for a long time (for example: a screen printing machine operator), this should be possible. , because silver paste and aluminum paste are heavy metals. After being mixed and printed in a blender, heavy metal ions will be produced in the air of your workspace and enter the human body through respiration. varying degrees of damage to your health, such as infertility, skin diseases, etc. Of course, the possibility of Alzheimer's disease, as you mentioned, is also possible;
In fact, as long as protective measures are taken well, there is no problem. When working, keep the printing machine door and the oven door closed. Close it and let the volatile metal ions be extracted by ventilation, cover the lide when you stir and do not leave the bottle; contain the slurry in a place without ventilation at any time, so that the chemical components contained in the slurry can evaporate as little as possible in your working environment. Everything will be fine in the environment;
Hello, the above. points have virtually no impact on the width of the line.
Influence on line height: 1. The faster the speed, the greater the thickness, and vice versa.
2. The higher the pressure, the thinner the thickness, and vice versa.
3. The thicker the film, the higher the thickness, and vice versa