Vulkollan® – ”The king of urethanes”
Vulkollan® is one of the elastomers offering the best performance levels on the market. Its extreme capabilities are continually solving new problems and bringing optimisation and cost reduction to users. UW-ELAST AB has long had a licence for producing BaySystems’ Vulkollan®.
We currently supply Vulkollan® grades in hardnesses between 60 Shore A and 95 Shore A.
The Vulkollan® manufacturing process
Vulkollan® is a cross-linked elastomer comprising polyols (ester) with diisocyanates – naphthalene diisocyanate (NDI). Manufacture is in several stages through chemical reactions. The process is extremely precise and time-consuming. After meticulous mixing of the constituent components in accordance with an established formula, the material is cast in preheated moulds.
Depending on material thickness, the post-curing process requires several weeks of curing at room temperature (at least 25°C) interspersed with post-curing at 110°C. Not allowing the recommended post-curing time has a negative effect on the quality of the components. Consequently, delivery time should normally be from 4 to 6 weeks.
The properties of Vulkollan®
Vulkollan® has many fantastic properties. The mechanical and dynamic properties are particularly prominent and often provide solutions in the most demanding applications. Dynamic properties as a wheel material are an extremely strong advantage of Vulkollan®. To these can be added high loading capacity and suitability for high speed applications.
We use a Vulkollan® coating on high performance wheels in/on, for example, mills, free fall mixers, roller coasters, etc. Damping elements, scrapers and plough blades are amongst the other suitable applications.
The advantages of Vulkollan®
- Withstands high dynamic loads.
- High tear resistance.
- Good resistance to UV radiation, ozone, fats and oils.
- Low temperature dependence.
- High wear resistance.
- Low permanent deformation.
- High shock elasticity.