Seals and Gaskets

Thermoplastic

TPE Extrusion 

The use of TPE (thermoplastic elastomer) is becoming more and more frequent for dynamic gaskets (weathertightness or glazing), due to its excellent characteristics and above all its elasticity and recovery. It is also resistant to UVA rays, saltpetre, ozone and atmospheric pollution.









 
TPE Co-extrusion

This consists of a simultaneous extrusion of Polypropelene and TPE. Its design permits to achieve a combination of properties that are specific for each use. 

The co-extrusion of PP & TPE in various hardnesses is a continual process that gives a semi-elaborated product manufactured from both materials, but in order to achieve this each one has to be laminated in seperate extrusion lines. Normally the joining of the material is made with a flow distributor which contains the entrances of each extrusion line in order to make the configuration and material percentages and on exiting, the connection to the bolster so that the die provides the final shape of the product to be manufactured.

Our TPE co-extrusion designs are principally focused on slip gaskets such as those for sliding doors and windows and  casements. 

 

 
Thermoplastic triple-extrusion

Triple extrusion is a continuous process that allows the opportunity of a semi-finished manufactured part using various materials but in order to achieve the association of these, each one must be laminated in a different extrusion line.

Normally the union of these materials is made with a flow distributor which contains the entrances of each extrusion line in order to form the configuration and material percentages and at its exit, the connection to the Distributor head so that the die provides the final shape of the product to be manufactured. The triple extrusion installations are basically the same as those of an extrusion line except that there are various independent extruders for each component of the semi-finished product and the distributor head has an individual distributor for each product so that before exiting the die the various flows converge in the die and are fused together to form one product.


With this technique we can cover practically all the industrial sector requirements.


Principal advantages of triple extrusion:
A combination of specific properties: This achieves the optimization of the characteristics of the most costly polymers by minimising the total necessary


quantity to achieve a specific requirement if we compare this with a single lined film where the components are found to be mixed.

Triple extrusion with a high resistance polymer can allow the possibility of obtaining exceedingly small thicknesses and at the same time prolong or improve their fundamental properties.

Applications:
Dynamic gaskets for sliding systems. The combination of TPE with different rigid self-lubricating polymers allow us to combine in one gasket, good dynamic performance and water tightness (TPE) and very low friction with the surfaces that come in to contact with the gasket. For sliding systems, additives are also applied that reduce friction with the profile.

Gaskets with a “peelable” coating that are used in timber systems where once paint has been applied on to the profiles, the peelable surface can be removed so that there is no paint residue.


 
   


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