PPR Overview


PPR Overview

TECHNICAL INFORMATION – Polypropylene Random Copolymer (PPR)

Polypropylene Random Copolymers are thermoplastic resins produced through the polymerization of propylene, with butane and ethylene bonds injected in polymer chain. The tar provide a broad range of characteristics, and are used as an extensive variety of applications.

The thermoplastic resins most often used to make pipes for water and heating systems are:


  • PE-X Cross Linked Polyethylene
  • PP-C Copolymer polypropylene
  • PB Polybutene

All the above mentioned resins belong to the polyolephine family, a group of plastic materials obtained by polymerization of unsaturated hydrocarbons, which have one or more double links.

In a conventional polymer the molecular chains are irregularly placed; they have fairly good mobility, heat causes oscillation in these chains until they break, resulting in alteration of the material’s characteristics.

Two ways of preventing this problem have been tested.

  1. Researchers have selected polymers with long molecular chains because, as molecular weight increases, the mechanical characteristics of manufactured items improve; these chains must be as linear as possible, i.e. they must show a low number of ramifications and a high degree of crystallization by extrusion these chains are submitted to stretch, allowing crystallization of a further percentage. Isotactic polymers show much better mechanical characteristics as compared to their correspondent amorphous polymers; they maintain their properties up to temperatures close to melting point.This describes the nature of polypropylene techno-polymers in a simple way.
  2. The other way tested by researchers is creation of chemical links among molecular chains in order to make them much steadier and avoid their sliding. This procedure has been adopted for the cross linking of polyethylene PE-X.



Thus it is guaranteed that goods manufactured have high mechanical properties; it has been stabilized with appropriate anti-oxidants to postpone the combined effects of pressure and temperature for a very long time.

Property of Raw Material

KPT- PPR Plumbing Pipe system is made from Basel & Hyosung materials which are considered as one of the best PPR material all over the world, a PPR approved for the production of pipes and fittings according to DIN 8078 & DIN 16962 standards. PPR Raw material is a thermoplastic resin which is transformed into the final product by an ascent in temperature to plasticize the material to allow the pipe to be prepared through EXTRUSION, and the fittings by MOULDING. The raw material is supplied in granules precolored. Special heat resistance is one of the features of this material, lts physical and chemical properties are well suited to the transfer of potable water and in the heating sector. Depending on pressure it is possible to use KPT pipes for constant temperatures up to 70°C with service life of more than 50 years. Peak temperatures of 100°C arising from shot disruptions are not creating any problems.

PPR Overview