At Westeck we subject the PVC to a flame treat process that can raise the surface energy from 42DYNE to above that of Waters 72DYNE.
To try to better explain it. When the surface energy of PVC is raised to this type of energy be thought of as “micro anchors points’ to which the paint can adhere.
In our flame treat process, we subject the PVC to a very lean burn flame of natural gas. The temperature of the flame is roughly 5000°F. At these temperatures a low temperature plasma is created. In effect the excess oxygen in the flame is heated to the point of ionization. Which means that the oxygen loses an electron and becomes a positive ion. In this state the oxygen is very very reactive and wants to bond to another atom or molecule. In our process the 0+ is introduced next to the PVC and bonds to the PVC. The result is the surface energy of the PVC is raised tremendously. There is another benefit of the flame process which is to remove the surface waxes on the PVC raising the surface energy of the PVC.
So, whew… there you have it. PVC can be painted but it has to be prepared correctly and it needs to (note: I said needs to, not has to) be painted with paints that are formulated for PVC. At Westeck we also put reflective pigments in the paint so that the PVC will not rise above it’s distortion temperature of 140°F. (note: for dark colors PVC has to have reflective pigments)
With our reflective pigment paint you can paint your windows with black paint and not have distortion issues
Please contact us for more information about our wide variety of beautiful colours to choose from for your next project.
Original article by Abe Gaskins MGM Industries