Three major problems related to the fading of plastic parts
08/27/2018
Question 1: Is the fading of plastic parts related to radiation?
A: It doesn't matter! Generally, if the color is faded, the raw materials used are too
small, and if the sun is directly exposed, it will be particularly easy
to weather.
Question 2: PP plastic parts (dark blue) faded, the staff hands are all blue when assembled, what is the problem?
A: First, the problem of raw materials. There are too many fillers in the raw materials and the coloring is poor. The
specific method of identification is very simple. Use a lighter to burn
it, blow it out, and quickly draw the fire point. It is a good material
to draw half a meter, and pull out the wire below 10 cm for the
difference. Or put the PP pellet into the clear water, the whole float is a good
material, 60% float is the general material, and the other is the
difference material.
Second, the pigment is poor. If it is made of color masterbatch, it is
recommended to use it as a toner. If the toner is still not solved, it
is definitely a raw material problem.
Question 3: What is the principle of plastic color changing with temperature?
A:
The instability of organic pigments, especially when the temperature is
high, will be more unstable, which will lead to problems such as color
loss and lightening. Many colors are combined by other colors, so the
difference in temperature is not only faded, but also It is possible to become other colors. The
main cause of the problem is the instability of the color. Before the
color difference adjustment, the color of the product changes with the
temperature and the amount of the color masterbatch. Different color masterbatch varies with the temperature or color
masterbatch of the product, and the color change law of the product is
different. The color change process can be used to determine the change
rule.
A reversible thermosensitive polymer functional dye may be added. It
is a color changing oil composed of a heat-sensitive organic dye, a
color developing agent, a decolorizing agent, a sensitizer and an
ultraviolet absorber. The dye is sensitive to temperature, and the color
can be reversibly converted according to external temperature, and can
be widely used. In the printing, thermochromic vessel coatings and other industries.
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