Masterbatch Colour Matching
We do provide service for regular colour matching for materbatch of different polymeric materials, easy. However, our expertises and experiences enable us to specialise at very challenging request from our customercases.
Fluorescence in transparent and translucent polymer
The biggest challenge for the fluorescent colour matching in transparent or translucent plastic materials is: The appearance of the fluorescent colour under daylight is determined by the pigments not only located on the surface, but also those embedded in the whole thickness of the entire plastic material. In comparison, under UV light in the dark, the performance of the fluorescent colour is determined by the pigment located on the surface of the plastic materials because the plastic material will absorb UV light and fluorescent light.
We own the unique colour matching technology that can perform fluorescent colour matching for transparent or translucent plastic materials. Our special color matching for fluorescent masterbatch aims to make the colour appearance of the customer´s final product fit so well as the standard sample.
Example
The photos below show the fluorescent nylon masterbatch that we have tuned as an example. After injection moulding, its daylight colour and its fluorescent colour under in the dark are the same as the fluorescent pigment-dyed standard filament (Exactly the same thickness/ diameter, masterbatch material: PA6)
Thermochromic Colours
Since the thermochromic pigment has lower colour thickness and higher transparency than the usual pigment, the colour addition between thermochromic pigments and between thermochromic and regular pigments is frequently very different from the general perception. Consequently, Therefore, the colouring matching of multiple stage thermochormic masterbatch is quite challenging.
Not all thermochormic colour combinations can be achieved. Nevertheless, within the range of adjustable colour combinations, our three decades experience can try our best to meet the requirements of our customers.
Example
The photos show how carefully our R&D adjusted the colour before (green) and after thermochormic switch (yellow) after the request of our customer (FDA level PP thermochromic masterbatch).
Glass Fibre Containing Polymer
Glass fibre cannot be dyed. It can physically interfere with the colour appearance. The surface of glass fiber-containing products is usually rough and the glass fibre floating could be serious. Therefore, irregular light scattering, diffusion and diffraction phenomena may frequently occur, consequently interfering with the colour difference measurement via the colour difference metre.
In addition, adding coupling reagents is a must for compounding GF containing materials to make GF compatible with the plastic. And the coupling agent, which will react with the pigment molecule, is exactly the major cause of the unstable colour performance of GF-containing materials.
Example
Here, our experiences showed that the visual colour is identical even although the ΔE measured by the colour difference metre shows a value of 2-3.
Spot & Flow Pattern Masterbatch
In the case of spot masterbatch, the physical and chemical interaction between the pigment and polymer is so designed that after processing the pigment is presented in the polymeric materials in a inhomogeneous way, e.g. spot, flow pattern …
Example
Spot thermochromic masterbatch and flow pattern masterbatch:
Please do not hesitate to contact us for detailed specifications of each colour matching service
Donna Polymer
R&D Support & Customised Production
