Molecor presented one of its last R&D project to the world, CPVC-O pipes, getting a great reception from the audience.
By applying Molecular Orientation principles to CPVC, we want to achieve a product with all the advantages that traditional PVC-O pipes have increasing, at the same time, the resistance to high temperatures that CPVC pipes have presented till now. For that purpose, an existing orientation machine from Molecor (Model M-OR-P-1640) was adapted to work on a higher range of temperatures. The tests were carried with a preform and a final pipe of a popular and existing product, DN160 mm. The raw material was supplied by Lubrizol, TempRite 88703.
Some changes had to be applied in the extrusion parameters and in the orientation stage. Temperature had to be increased, in steps of 5 °C, until the perfect temperature for orientation was obtained. Once the orientation parameters were fixed, pressure and expansion speed were adjusted for this purpose. After fixing them, a set of pipes were manufactured in standard conditions, proving the suitability of the line for producing CPVC-O as well.
One of the main conclusions obtained from these tests is that orientation in CPVC is possible obtaining much better mechanical properties than those of standard. Compared with PVC-O, CPVC-O behaves worse in impact tests and has a lower young modulus although, when compared with the original material it is quite a superior material.
CPVC-O’s MRS is similar to PVC-O at ambient temperature, but as far as temperature goes higher a better performance is shown. Apart from this, CPVC-O pipe could be used, reaching material savings up to 65% depending on the application.
The application of orientation to CPVC could bring CPVC-O to a business of massive use in the civil works when working in hot environments.
If you want to download the full paper presented by Molecor at Plastic Pipes XIX just fill in this form and you will receive it.