All that you need to know about laminated uPVC windows

All that you need to know about laminated uPVC windows

The coloration of uPVC window profiles is continuously expanding, resulting in increased demand for UPVC window fabricators, as people’s aesthetics for the architectural style of buildings improves. However, conventional coloration processes for doors and windows, like as lacquering, coloring, and co-extruding, are not the optimum choice due to limitations that have been proven over time.



For example, in the Asian region, co-extrusion is the most preferred coloration procedure for uPVC window profiles suppliers. It demonstrates that the strongest demand in the industry is for single-colored uPVC windows on the outside. The low cost of co-extrusion is a plus, but there are numerous downsides, including single colour and larger mould investment, as well as negative feedback from diverse places, particularly in extreme climate areas, following its implementation in recent years. It can withstand a variety of weather conditions. When the climate changes from hot to cold, the profile will release its internal co-extrusion tension, causing deformation and perhaps breaking of the fillet weld.


Although there is more colour variability in lacquering, it is extremely difficult to maintain a tiny colour variance between production batches. Furthermore, the anti-scratch and weather resistance of spraying paint layers and profiles will be determined by the binding strength of the paint layer and profiles. The truth is that this power is always weaker than it appears. Lacquered uPVC profiles are quite rare in the market due to the aforementioned reasons.



Coloring refers to the process of using pigment to colour the entire uPVC profile during extrusion. Because the base material is PVC, this technique has a low weather resistance concern.


Lamination is always the most common procedure for colourful uPVC windows in Europe, but because of the expensive cost, it hasn’t been accepted by the primary market in Asia. Lamination is based on high-quality branded film that not only solves the problem of weather resistance but also fully meets the expectations of uPVC window individuality and coloration. In a nutshell, lamination is the process of wrapping a high-weather-resistance foil around uPVC profiles using a laminating machine and a high-efficiency, high-weather-resistance glue.


The profiles only need to be stored for a short period of time to allow the adhesive to solidify before being utilised in the following step.

Process of Coloration in the Future

With the various layers of window films constantly being introduced into the market, there is a strong possibility that the lamination process may eventually replace the current co-extrusion technique on a wide scale. In the trend of increasing internal quality in the uPVC profiles business, proven higher performance of the lamination process will undoubtedly win the future.