Micro-Bead Concentrates Cut PET Bottle Scrap

A new family of color concentrates reportedly enables PET bottle makers to reduce scrap and eliminate handling problems posed by conventional PET colorants.

A new family of color concentrates reportedly enables PET bottle makers to reduce scrap and eliminate handling problems posed by conventional PET colorants. The PETek series from Teknor Color Co., Pawtucket, R.I., is based on technology introduced last year for PET health and beauty-aid packaging but is formulated at lower pigment loadings for beverage bottles.


Unlike liquid and wax-based colorants for PET bottles, PETek concentrates are micro-beads of a compatible polymer (such as a low-MW PET). Beads are as small as 0.050 in. Outstanding dispersibility reportedly reduces swirl and haze. Scrap rates can be cut to less than 5%, according to Teknor. PETek beads eliminate the bridging and clumping of wax-based colorants and the screw slippage and messiness posed by liquid colors.