The many materials used for road markings must be resistance to weather-resistant, skid-proof, abrasion-resistant to abrasion and colourfast. Fillers are a decisive factor in the quality of these substances. They are chosen on the basis of such criteria as the size, distribution, shape and surface of the individual particles. Other factors that play an important role are the quantity of binding agent, hardness, resistance to weathering, purity, brightness and colour. They all influence the quality as well as the cost effective compounding of road marking materials.
Quarzwerke High Performance Fillers for road markings:
Silicates have proven to be excellent High Performance Fillers in the paints used to apply roadmarkings, both because they ensure good traction and because they are established as admixture for reflexion beads. The most important features of these fillers are:
- chemically inert
- silica: high degree of hardness and grain stability
- cristobalite and Weisser Quarz: High proportion of white and rough particle surface.
- as an additional benefit Weisser Quarz particles are very stable
Ideal quartz/filler combinations for applying thick coatings such as thermoplastic
To determine the optimal mixture ratios, combinations have been developed that result in convenient application and use (spread value):
- high filling power
- high mechanical strength
Quartz/filler combinations for applying thick coatings such as cold plastic/paint
Combinations of fillers such as silica sand and powder are suitable for creating very bright or colourful coatings for road markings (e.g. bright yellow). White quartz is used in place of coarse quartz gravel and sand.
White Quartz in Typ II – road markings
White Quartz is used as a course particle to add structure to Type II road markings. This achieves a textured surface structure that prevents a film of water from forming on the road markings, reducing their visibility when it rains. Thanks to the use of white quartz, road markings retain their reflective properties even when wet.