Virgin polypropylene is new resin made to a producer’s grade specification; recycled polypropylene (rPP) is reprocessed from production scrap or used plastic, and it gives up stiffness, lot-to-lot consistency and easy food-contact approval in exchange for recycled content. It is…
Why does the same resin family produce a milky homopolymer pail and a near-transparent yogurt cup? Clear polypropylene is not a separate grade family. It is two decisions stacked on top of a commodity polymer: a random copolymer base resin…
The top 10 polypropylene manufacturers are Borealis, Braskem, ExxonMobil, INEOS, LyondellBasell, PetroChina, Reliance Industries, SABIC, Sinopec and TotalEnergies. Each of them polymerizes propylene into PP resin in its own plants or joint ventures. Compounders, sheet and film makers and distributors…
Specifiers usually arrive at this decision the same way. A supplier sends a quote with a four-character grade code and an MFI number, and the question shifts from “which PP family” to “is this the right family for what I’m…
Polypropylene plastic is a semi-crystalline thermoplastic polyolefin, polymerised from propylene gas and sold as pellets. It is the second-largest commodity thermoplastic by volume once the polyethylene grades are counted as one family. The base polymer is cleared for food contact…