amazing plastic dyes its vast applications and properties
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Amazing Plastic Dyes Its vast applications and properties
Color, the most important part of the lives of humans since generations and ages is
once such thing that gives meaning, existence and separation of one thing from
another. Nothing in this world can be called as beautiful and attractive without the
presence of colors. Same lies true when we color our world with paints or apply color to
different things through man-made, industrial methods and resources.
Earlier, application of paints to make an object attractive has been done from several
years in conventional methods and procedures, which includes stages like sanding,
priming and then coating the surface with the respective coloring agent. However, the
drawback of using these coloring methods and colorants on plastic products
deteriorates plastic under the favorable conditions. In the fast developing technological
world, dyes and pigments are the two revolutionary colorants that had been discovered
to render excellent finish and luster to all kinds of materials. These dyes are
predominantly used in the plastic industry all across the world because of their exclusive
benefits like durability, heat resistance and transparent capability.
If we talk about the dyes that are used in plastic industries, then one thing needs to be
kept in mind is that these dyes should be strong enough to show good heat stability.
Along with that these must be transparent. Pigments are a better choice as compared to
dyes for use with polyefins as dyes tend to migrate in polyefins. And with their
opacifying ability and broader chroma, they are preferred over dyes as a colorant. The
nature of pigment is also a very huge factor. Depending upon the processing
temperature requirements, the choice of organic or inorganic pigments is made.
Another important thing that determines the choice of the colorant is the application of
the plastic. If the plastic is going to be used in food industry, then toxicity needs to be
checked. And a slight miscalculation in the choice can alter the properties of the plastic
and prove to be very harmful for the industry. Hence, the choice of a colorant becomes
so vital.
Being solvent based dyes, plastic dyes exhibit a good solubility in polar and organic
solvents. Additionally they have an extremely good light and heat fastness and are quite
stable. The fact that the dye is available in a wide range of shades and can be put todiverse industrial uses also contributes immensely towards the popularity of plastic dye.
These dyes also exhibit a relatively low toxicity in solvents, making them safe for use in
products used for storing food items, medicines etc.
One of the big advantages that plastics have over metals is the option of providing
molded-in color. While many large parts are still painted in order to achieve the desired
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aesthetics, even in these cases the eventual goal is the elimination of the paint line in
favor of color that is incorporated di rectly into the base polymer.
It is a very long and strenuous process to be completely dissolved to its last bits. Till that
time, it adds to the pollution in a number of was. Not only does it increase air pollution
due to the toxic gases released, it also harm the water bodies in which the pollutedparticles will enter. Additives, including colorants, for bioplastics are being widely
investigated. Of particular interest are colorants that have no adverse effect on health or
the environment and do not compromise bioplastics' compliance with compostability
standards.
The unique advantage of plastic dyes is that the color seeps deep into the layers of the
material, providing uniform coloring to it from within. As a result, it gives long life to the
color aspect that cannot be scratched or peeled away.
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