The microcapsules are coated with a stealth dye, a color forming
agent and a temperature controlling agent. By selecting different
temperature control factors, it is possible to produce color
materials with different temperature intervals.
2. Product Description
Principle of discoloration: low temperature color development and
high temperature colorless
Product range available: -15C ~ 70C
Basic color: 15 colors can be provided for each temperature. Each
color can be mixed with each other. Other color materials can be
added. The following colors are close to the PANTONE color code.
The color of the product is subject to the actual material.
Advantages of thermochromic pigments in plastic products:
Thermochromic pigments are suitable for injection molding and
Its characteristics are: thick wall of the capsule, high strength,
good heat resistance, easier to disperse evenly, and less residual
color during decolorization.
Scope of application:
This product can be used for injection molding and extrusion
molding of transparent or translucent plastics such as polyethylene
(PE), polypropylene (PP), polystyrene (PS), soft polyvinyl chloride
(S-PVC), AS, ABS and silica gel. . It can also be mixed with
unsaturated polyester, epoxy resin, plexiglass or nylon monomer for
casting, molding and curing.
When used for injection molding, extrusion processing or casting,
molding, and curing, the color changing pigment is used in an
amount of 0.5% to 1.0% by weight of the plastic. The color-changing
pigment should be thoroughly mixed with the plastic particles (a
small amount of white oil can be used when mixing). If the ordinary
pigment is color-matched with the color-changing pigment, the
ordinary pigment (or dye) is used in an amount of about 0.5 to 2.5%
of the color-changing pigment.
In mass production, color-changing pigments can be added to
polyethylene wax or polystyrene wax to prepare a color masterbatch
with a pigment content of 10%, and then mixed with plastic
particles. This allows the discoloration pigment to be more
The processing temperature should be controlled below 200 °C, not
more than 220 °C, and minimize the heating time of the material.
(High temperature, long-term heating will impair the discoloration
performance of the pigment).
After the injection molding is finished, the cold water is rapidly
cooled, and the color density of the product is better. (natural
cooling, slow heat dissipation of the product will lead to product
color fading or discoloration effect deterioration)
AWhen using color-changing pigments in injection molding and
extrusion, other fillers or common pigments (such as titanium
dioxide, calcium carbonate, barium sulfate, carbon black, etc.)
should not be used in the plastic at the same time, otherwise the
color change effect will be shielded.
B: When using color-changing pigments in casting, molding and
solidification, the color-changing pigment should be added to the
unsaturated polyester, plexiglass or nylon monomer to stir and
disperse uniformly, and then the initiator or curing agent is added
to start the polymerization or crosslinking reaction. Since the
viscosity of the system rises sharply after the prepolymerization,
the addition of the color-changing pigment at this time causes a