During electrostatic flocking millions of flock fibers are applied in an electrical field onto a substrate coated with adhesive. The adhesive layer thickness must not be too thin, so the flock fibers can be adequately anchored. Application of the adhesive is done through rolling, painting, spraying, immersion, screen printing or pad printing. Dosing of the flock fibers is done with surface flocking, e.g. via dosing boxes. The flock fibers are brushed with a brush through a metal grate which is under high-voltage.
Flat surface flocking with dosing boxes
Three-dimensional components, e.g. passenger car glove boxes, are flocked electro-pneumatically. Here the flock fibers are blown with a fan by an electrode that is under high-voltage. This charges the flock fibers. This can be done both manually and robot controlled.
Manual applicators are often used in T-shirt flocking. An electrode under high-voltage is inside of the applicator. The cover of the applicator is a plastic sieve. The flock is located between the plastic sieve and the electrode and is dosed through the sieve through gentle shaking.
Electrostatic manual flocking
The field lines ensure that the fibers are aligned vertically. This creates a uniform, textile surface. Modern adhesives ensure that the locking is very durable and resistant to abrasion. Depending on the thickness and length of the fiber, from a velvety to a hard, abrasive surface can be made, corresponding to the desired function, look or feel.