Processing Machinery
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Color Difference/Unstable Color of Biaxially Oriented Polypropylene Film ABS Products
Problembeschreibung
The color of ABS products is unstable, and color differences appear between different batches or within the same batch, affecting product appearance consistency.
Ursachenanalyse
(1) The color masterbatch is poorly dispersed
(2) Processing temperature fluctuations cause different pigment dispersion
(3) The regrind ratio is inconsistent
(4) The base colors of the raw materials are different
(5) The screw shear is insufficient
Lösung
(1) Use a color masterbatch with good dispersibility
(2) Stabilize the processing temperature within the range of 140-170(stretching)/230-260(extrusion)°C
(3) Unify the regrind ratio
(4) Use raw materials from the same batch
(5) Use a mixing-type screw
Wichtigste Erkenntnis
ABS color difference is caused by uneven pigment dispersion and process fluctuations.
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