Roval is the market leading specialist in cotton rolls and is 100% dedicated to their production. The rovalrolls technology is widely used for the calendering and embossing of paper and textiles.
Supercalendering
The process influences the surface characteristics of the paper or fabric (eg gloss, smoothness, lustre), depending on the nip pressure, the roll surface temperature, the process speed and the elastic behaviour of the cotton roll cover.
Many types of coated and special papers, and various fabrics are calendered to improve their finish.
Embossing
The operation of transferring a pattern from an engraved roll to the paper or fabric (for example imitation leather, geometric designs, logos etc).
Textile calendering
The choice of rovalrolls cover material (elastossimo, elastoglaz or silineos) is defined according to the operating conditions of your calender (speed, humidity, temperature, linear load), and taking account of the type of fabric to be calendered (natural, sythetic, nonwoven) and the desired finish (e.g. soft hand, sheen, chintz, reduced permeability). This cover engineering determines the parameters of the cotton roll production and the roll’s efficiency for your specific calendering process.
Machining
Rovalrolls sprinks steel shaft technology guarantees the operational safety and geometric precision of the covered roll. Knowing the exact shaft design enables accurate calculation of the required camber for textile and embossing calenders.
Process engineering
Process parameters such as cover material moisture content, interference fit and density are calculated according to the cover material properties and the calender running conditions.