Sealing technology is one of Breidenbach’s most important market segments. As a specialist in processing soft thermoplastics, we are the best development partner to have in the sealing industry.
Thermoplastic elastomers (TPE) have been up and coming in the sealing industry for years now. That has to do with the many benefits TPEs offer in processing as compared to traditional elastomers. Click here to read more on the advantages of TPE.
In seals, a general distinction can be made between static and (semi)dynamic seals. Static seals are often locked between fixed components and are under constant pressure.
Dynamic seals move along with the surface to be sealed. It is therefore important that these seals are able to stand continuous warping. That is why compression set values are often a criterion for the selection of dynamic seals.
Semi-dynamic seals are seals that do move along with the surface to be sealed, but only occasionally and not continuously.
Therefore, a material’s compression set as well as its creep properties are very important in semi-dynamic seals.
Choice of materials
Our choice of materials is initially done based on resistance requirements.
In our selection of materials, we work with a “funnel model”, in which we have four different levels from which we choose substances.
First of all, we look at the requested temperature resistance. This criterion can often already narrow down the search.
Then we focus on various types of chemical resistance. The material has to be able to withstand specific substances such as acids or oils.
Thirdly, we look at the mechanical properties a material has to have. In seals, we are usually concerned with the compression and creep properties, but also with the hardness of the material.
And finally, we look at product-specific requirements, such as for example certain specific permissions or cases in which written statements on resistance or contents are required.
As important as choice of material is the lay-out of the seal. By changing the geometry of the shape, sealing properties can be improved and a seal’s potential weak points can be altered beforehand.
Our extensive experience in seals allows us to use our best practices to provide you support in optimising your seals.
In the process of optimising the geometry of the seal, we always say: the earlier in the design process you come to us, the better. That will allow us to provide you with the best support. So contact one of our sealing experts for a consult today!