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OPTICAL BRIGHTENER (OB) CONCENTRATES are available in the form of yellow pellets. The carrier resin is PET, PBT or Co-PET. They provide pleasing white appearance to polyester fiber. In combination with titanium dioxide, a snow-white color is imparted. They provide this effect by absorbing the ultraviolet (UV) portion of the incident light and re-emitting at a higher wavelength in the blue region of the visible spectrum. They possess high thermal stability and display minimal degradation at PET processing temperatures.
OPTICAL BRIGHTENER (OB) CONCENTRATES
Polymer additives supplied by Americhem
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OPTICAL BRIGHTENER (OB) CONCENTRATES
by Americhem
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