Durometer of squeegee how to identify?

Glue squeegee is generally made of special polyurethane. durometer of squeegee refers to the hardness of polyurethane. It determines the solvent resistance and abrasion resistance of the squeegee. It also determines the flexing resistance of the squeegee in printing.

Scratch the hardness of the general use of Shore durometer to determine. Determination of the plastic scratch on the surface, the needle on the base of the instrument probe into the squeegee stuck on the surface, the measured readings are displayed on the instrument panel.

Scratch the higher the hardness, chemical resistance, wear resistance, the stronger.

The use of low hardness, blunt edge of the plastic squeegee, attached to the printing ink thicker; the contrary, high hardness, the edge is Fengrui plastic squeegee, printing ink attached to the thinner. In the choice of squeegee type, print quality and clarity are usually to be given priority, the choice of different durometer of plastic squeegee, making it suitable for printing materials. Generally, if the printing material is rough, the surface is not smooth and uneven, the use of a high-hardness squeegee can not transfer the required ink well to the printing material, and the softer squeegee fits well. The surface and structure of the substrate material to produce the ideal printing results. Taken together, the result is to choose both with the printing material to match the durometer as high as possible plastic scratch.

When the squeegee is worn, it will become shorter, even if its hardness has not changed, its size changes enough to affect its bending characteristics.

With the further development of squeegee manufacturing technology, manufacturers have produced composite and "double-hardness" squeegees that enable printers to use squeegees that are less rigid and not flexible. Saati's double-hardness squeegee has a Shore 90- to 95-degree reinforcing tape over the lower edge (50-70 degrees Shore) printed edge. The compound squeegee has a glass fiber reinforced tape that is inserted in the center of the polyurethane during the molding process. This stiffening band prevents the squeegee from bending and helps to keep the printing parameters stable. Composite squeegee can use a softer hardness, while maintaining the same angle of attack throughout the printing process, the printing pressure is stable and consistent. Fiberglass tape also helps to maintain the rigidity of the squeegee, making it easy to fit inside the squeegee holder.

Scratch the durometer of a direct impact on the quality of printed matter. If the hardness is low, the squeegee will bend under the pressure of squeegee, which will reduce the squeegee's effective squeegee angle. Based on this, higher hardness maintains greater stability between angle of attack and squeegee angle, and squeegee's effective squeegee angle controls print clarity and fine-tune ink adhesion. For example, a very high-hardness squeegee that helps slightly more ink to be pushed through the screen if it is slightly reduced.

The amount of ink deposited is controlled by the durometer of the squeegee and the effective squeegee angle, not by pressure. Too much stress often results in poor printing, which can damage or reduce the life of the squeegee, as well as the print resistance of the screen and screen.

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