Screen printing often needs to choose the screen yarn. The first thing is to determine what kind ofscreen printing printing screen to choose? Let's take a look.
Now you can choose nylon mesh, polyester mesh, metal mesh, silk mesh. At present, this kind of silk has been eliminated. Our main choice is to choose from nylon mesh, polyester mesh, etc.
Nylon wire mesh is formed by weaving nylon monofilament, and then heat resistance and dimensional stability treatment.
Features:
The nylon mesh has a smooth surface and good ink permeability. It can use inks with high viscosity and large particles, so you can get fine printing patterns; use very fine mesh woven mesh, suitable for painting patterns and dot printing with thin lines; Large elasticity, suitable flexibility, good adaptability to substrates, suitable for screen printing printing of uneven and curved surfaces; good tensile strength, nodular fastness, elasticity and friction resistance, long service life; acid resistance, chemicals and The organic solvent has good performance and is easy to regenerate. Although it has extremely strong resistance to alkali.
Nylon mesh has a higher elongation than polyester and silk mesh.
Therefore, it is required to use a strong screen frame and stretcher; because of its low heat resistance, if the net is fixed to the frame by the hot melt method, it is difficult from the viewpoint of operability; it is not resistant to strong acid, phenol, cresol , Formic acid, etc .; ultraviolet rays have a slight effect on it, so avoid light when storing.
Polyester mesh has the following characteristics: small tensile elongation and strong elasticity, single wire mesh is suitable for printed integrated circuits, thick film semiconductors, scale plates, counting plates and other high-precision printed matter.
Pay attention to the following points during use: Polyester wire mesh has good dimensional stability and is suitable for high-precision printing. Therefore, it requires a larger stretch tension than nylon wire mesh, and requires a stronger frame, stretcher, and firmer Bonding method;
The selection of the screen must be based on the actual situation. We need to choose the right one, which will be very helpful for our use.
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