Mechanistic Fundamentals of Smart Coloring Technology
As mentioned above, the key-locker principle of subsequent coloring of plastic films, parts or general objects bases on the ability of these plastics to firmly store organic and/or inorganic components such as dyes in the plastic matrix.
Some plastics can be dyed with our dyestuffs without the necessity of additivation. Here, however, the dyestuffs are not firmly bound to the plastic matrix, so that uncontrolled migration might occur. This makes its use in some applications such as direct food contact impossible.
Our additives prevent unintended migration through the key-locker principle. Nevertheless, we strongly recommend to carry out application-specific tests.
By adding additives to the plastics the basic possibility of coloring as such, sufficient storage capacity for dyestuffs and ways of removing the dyestuffs are created. Accordingly, dyeing is only carried out in that areas where the additive has been added, e.g. in the case of multi-layer laminates only in individual layers.