Can you give us information on hot melt compounds and wrinkle finishes ?
Hot melt compounds are used for road marking paints, being applied in thicknesses between 3 and 15 mm. Such compounds consist of solvent-free thermoplastic polymers such as vinyl chloride copolymers, polyacrylates and sometimes also polyester resins. Special grades of titanium dioxide may be used as white pigments, together with fillers.
Here, very briefly, some information on their manufacture. The components are mixed and melted. The resulting melt is then extruded and the extrudate pelletised and sieved. The decisive factors as far as quality is concerned are mechanical and thermal stability of the resin, a sufficiently high softening point, dimensional stability at elevated temperatures and low temperature impact resistance.
Now to wrinkle finishes, whose typical film structure depends on a number of factors. If the paint contains solvent, this will evaporate more quickly from the film. The use of larger amounts of driers, too, can cause local drying differences, leading to a wrinkle-like texture.
