A new, proprietary PP formulation is said to dramatically extend the service life of PP in aggressive environments in such piping applications as transportation of hot water or warm hydrocarbons or alkaline liquids in piping systems with PP liners.
The novelty in the new PP formulation lies in the additives package which includes a combination of phenolic and other stabilizers, according to market manager and packaging advisor Ole Jan Myhre of developer Norner, an independent plastics institute with over 35 years of industrial experience.
The Norwegian institute’s key customers are the plastics industry, with expertise ranging from the development, analysis and performance testing of catalysts and additives to the downstream sectors of oil & gas, consumable products and packaging, and building and infrastructure. It has a portfolio of customer projects in the field and a key resource in several R&D programs. “The proprietary solution developed for PP is currently in implementation phase in a harsh industrial environment at a chemical plant,” says senior researcher Harry Oysaed. He also notes that a the institute’s key success factor is its extensive contacts with additive suppliers, polymer producers and end users combined with its capabilities to tailor plastic formulations according to end use.
The development entailed the testing of different additive recipes for PP in liquids and solvents with the target of reaching service life longer than 20 years at elevated temperatures. Accelerated testing results demonstrated that even at 70 C, more than a 25-year service life is possible. Says Ole, “Our testing shows this formulation enables a service lifetime increase of between 20-50% compared to current PP-based materials.” As a result, he says this PP material technology could in many cases replace PVC, HDPE or ABS and provide several advantages, depending on the total specification of a particular piping application.