Usually the PET bottles we see are colorful, you may have questions, how are these plastic products colored? And why does it fade?
The coloring of plastic is actually very simple. It is to mix a certain amount of colorant and natural plastic evenly, so as to obtain an overall uniform color, but in fact, there are other requirements for plastic coloring, such as improving the light resistance of plastic. properties, adding antistatic properties of plastics, these can be processed by color matching.
Why do PET bottle plastic colored products fade?
The fading of plastic products is also related to the light resistance, oxidation resistance and heat resistance of the toner. If the light resistance level is poor, the plastic products will fade quickly. If the thermal stability of the pigment is poor, the pigment will change color and fade. Some organic pigments will gradually fade due to the degradation of macromolecules or other changes after oxidation.
What problems should be paid attention to when coloring PET bottle plastic?
The selection of pigment varieties should be as few as possible; pay attention to the shade of the pigment; choose the pigment with the same performance; the problem of the thermochromic effect of the pigment.
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