CESA BROCHURE - Clariant

Laser Marking, Phosphorescents,Optical Brighteners & OpacifiersLaser MarkingLaser marking utilizes the energy of ahighly focused laser beam to producea combined thermal and photochemicaleffect. PVC, polyolefins and other polymersthat are highly sensitive to laserradiation require special additives tomake laser marking viable. CESA-lasermasterbatches provide an effectivesolution. They also extend the limits ofthe technology by making it possible tomark in colors in addition to traditionalgray tones.PhosphorescentsPhosphorescent pigments arecharacterized by their ability to absorband store the energy of natural orartificial light, and then emit this energyin the form of visible light in the dark.CESA-lux masterbatches enablemolders to produce glow-in-the-darkextruded or molded articles.Optical BrightenersOften a brilliant appearance with abluish undertone is desirable forthermoplastic articles, particularly forpolymers with an inherently slightlyyellow cast. Topical optical brightenershave typically been used to improve thesurface whiteness of plastic articlesand synthetic fibers.Adding CESA-bright concentrates tothe polymer itself produces much betterbrightness retention over time thansurface treatment with topical opticalbrighteners. CESA-bright masterbatchesconvert UV radiation into visible, bluishlight, improving the long-term appearanceof finished products.Matting Agents & OpacifiersCESA-mat masterbatches containapplication-specific additives to modifythe surface properties of plastic products.They reduce gloss, giving a matteor frost-like effect to PET sheets andbottles, polyolefin films and a widerange of other products. They also areused to impart whiteness and opacityto plastic products, enhancing theirappearance by light diffusion.Available in a number of differentcarriers ranging from polyolefins andstyrenics to engineering resins, CESAmatmasterbatches are suitable for usein injection and blow molding, film andsheet extrusion and other processes.One application example is CESA-matNEA00500116 opacifier, used to obtaineye-catching aesthetic effects in PETbottles. Dosing level is 1.5 to 3.0%,depending on the desired effect.16