Vulkollan ®, a material with an elasticity similar to that of rubber, in its classic form is a polyurethane elastomer based on naphthalene-1,5-diisocyanate (Desmodur ® 15), polyester polyol and special chain extenders. It is produced using a hot-cast moulding process.
We can offer Vulkollan ® in a range of hardnesses from 65 Sh°A to 95 Sh°A
its mechanical properties are particularly favourable in the hardnesses from 80 Sh°A to 95 Sh°A, in fact these are the types of Vulkollan® that have the greatest share of the market.
Vulkollan®, a material with an elasticity similar to that of rubber, in its classic form is a polyurethane elastomer based on naphthalene-1,5-diisocyanate (Desmodur® 15), polyester polyol and special chain extenders. It is produced using a hot-cast moulding process.
We can produce Vulkollan® in a range of hardnesses from 65 Sh°A to 95 Sh°A, although its mechanical properties are particularly favourable in the hardnesses from 80 Sh°A to 95 Sh°A.
Vulkollan® based elastomers offer an exceptional combination of properties which makes them ideal for a wide range of special and demanding uses.
Eg: suitable for high dynamic stress, good resistance to UV radiation, ozone, grease and oils, low temperature dependence, high resistence to wear, low permanent deformation, high rebound resilience, high tear resistance.
Compact Vulkollan®, chemical and electrical characteristics
Polyester-based Vulkollan® is susceptible to the effects of hot water, caustic solutions and acids, in a process known as hydrolysis. A degree of swelling occurs in organic solvents, and the mechanical properties are compromised as the swelling increases. The solvents which swell the material physically can be removed at a later stage from the elastomer through a drying process. Many plastics contain free additives such as plasticisers, which can be extracted by washing, through contact with solvents, which can lead to changes in the material. Vulkollan contains no plasticisers and thus there are no noticeable changes in its characteristics following extraction of the free additives. Therefore the characteristics of the material remain predictable.
- Typical characterstics of Vulkollan®
- Chemical characteristics of Vulkollan®
- The effects of compression
- Characteristics of elasticity at different temperatures
The above-mentioned characteristics of Vulkollan are valid from 10/01/2014
Examples of application
High load-bearing capacity, low heat accumulation and minimum permanent deformation due to compression, thus virtually no flattening. Many manufacturers of electrical lifting machinery exclusively use wheels in Vulkollan®.
High elasticity factor allows a greater power transmission capacity, and thanks to the low damping there is minimal heating of the material.
Vulkollan®’s high level of elasticity allows it to be used for self-supporting structures. Its high resistance to wear guarantees great durability.
The low permanent deformation and low dynamic stiffening allow noise insulation and ensure long-lasting components.
SEALS AND WIPERS
Low permanent deformation due to compression, high compressibility and the absorption of oils and grease are indispensable characteristics for self-lubricating durable ring seals.