Co-Extrusion Profiles

Coextruded products combine two or more materials through a single die with two or more cavities arranged so that the extrusions merge and weld together into one structure.

PVTech co-extrudes Rigid PVC and Soft PVC profiles into a variety of shapes to form a consistent cross section. As the physical properties of both the materials are different, close observation and perfectly homogenized compound is essential for the extrusion. As both the compounds have different viscosity and curing temperature, the process parameters will differ as compared to single durometer extrusion. Most often the harder material serves as means of attachment and the softer compound completes the seal.

 

 

The tooling is a complex structure where in two different dies one for the harder material and one for the softer material are assembled in such a way that they act as one single die from which the desired geometry of the profile is extruded. The control parameters include the density and tolerance of both materials as individual and geometry as a whole part.

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