In screen printing, flexible doctor blades are used for distributing the printing inks. They must be able to withstand a wide variety of stresses and strains and must also have good swelling resistance in contact with the ink solvents used in the printing industry. This is no problem for Vulkollan®, because it is free of fillers and plasticizers – a factor that contributes to its good chemical resistance.
With long printing runs, it is essential that the quality of the prints remains consistently good from beginning to end. Since the edges of the blades are subjected to considerable wear and tear, it must have very high dimensional stability. The high shear modulus of Vulkollan® and its low permanent deformation are key factors when it comes to ensuring consistent print results. In addition, the quality of the fabrics is rising all the time, increasing the strain on the blade material. Vulkollan's® high mechanical resistance ensures a long service life and considerably minimizes the work involved in subsequent sharpening.
This superior combination of properties – namely high mechanical strength and excellent chemical resistance – guarantees an extremely long service life even when the doctor blades are subjected to extreme conditions.
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