SubscribeCurtain coating in the slide format is being adopted increasingly by large segments of the coating industry.
Optimal Dye Design
The curtain coating concept is simple enough, allow a liquid layer falling from a dye edge to impinge on a moving web. However, the realization of excellent coating quality with this method demands optimal die design coupled with precision fabrication. These are TSE’s strengths.
Premitered Coaters
As with all premitered coaters, the production of a uniformly distributed flow via the internal flow manifold requires both optimal manifold design and excellent slot depth uniformity. The curtain lip also must be designed to resist irregular wetting and the teapot effect. Furthermore, lip fabrication uniformity is essential for excellent coating uniformity.
Slide Curtain Dyes
TSE has produced successful slide curtain dyes for many years and for a wide variety of customers. During this time, TSE has developed the essential supporting technologies and designs associated with capable curtain edge guides, coating initiation/termination functions and devices that protect the liquid curtain from the detrimental effects of air currents.
In short, TSE is the leading supplier of slide curtain dyes with this world-class capability.
- Range of Application (order of magnitude only)
- Viscosity range [mPas]: 10 – 5'000
- Surface tension [mN/m]: < 40
- Coating speed [m/s]: 1 – 20
- Wet thickness HWet [µm]: > 5
- Dry thickness Hdry [µm]: < 1
- Number of layers: 1 – > 10
- Minimum flow rate [cm2/s]: > 1.0