Materials | technology STABILISERS
Songwon and Sibur supply agreement
Songwon and its distributor United Trading System (UTS) have signed an agreement to supply the Russian petro- chemical company Sibur with additives used in polypropyl- ene, polyethylene, rubbers and PVC.
Under the deal, Songwon will also provide technical support for stabilisers in end-use applications. The agreement will be
effective until the end of 2015 and was signed by Dieter Morath, executive vice president of Songwon International, Lars Hjorth, managing director of UTS Scandinavia and Sibur’s director for chemicals procurement Kirill Maksimov. ❙
www.sibur.com ❙
www.songwon.com
RECYCLING Chemical spray finds PVC in PET
Mexican researchers have developed a chemical spray that helps recyclers to identify PVC in the waste stream. The Centre for Research in
Advanced Materials (CIMAV) at Monterrey, in the northeast of Mexico, developed the technology at the request of a small recycling company – which wanted to differentiate PET from PVC. Sergio Pérez Alfonso
Garcia of CIMAV said that a single bottle of PVC could affect the price of a tonne of PET.
www.pipeandprofile.com “We developed a chemical
formulation to simply mark the product that needs to be removed – in this case the PVC,” he said.
CIMAV developed a chemical
marker which identifies the PVC. It can be applied as a spray. In less than a minute, flakes of PVC show up brighter
than the surrounding PET, he said.
The formulation can be applied before separating the bottles, but the company applies it when the polymers have been shredded. The liquid marker is sprayed onto the flakes and, in less than a minute, flakes of PVC show up brighter than the surrounding PET. “The chemical marker we designed is economical,” he added. “The question is to train people to handle it.” ❙
www.cimav.edu.mx
January/February 2015 | PIPE & PROFILE EXTRUSION 43 PE-RT
Flexible polyethylene pipe bends around corners
Dow has launched Hypertherm 2399, a polyethylene resin for domestic and commercial hot and cold water plumbing pipes.
The PE-RT material
enhances pipe flexibility, allowing installers to bend water lines at turning joints to ease installation. “Turning joints have always been a challenge when installing copper, steel and rigid plastic pipe,” said Oray Talu, market manager for Dow pipe and irrigation products. “These are typically the first points of failure and a major contributor to call-backs.” Dow’s new material
eliminates the need for breaks at joints, which reduces the likelihood of leaks. According to Dow, the resin
is the first product to meet US building codes and product standards for plumbing while also achieving Level 5 chlorine-resistance certifica- tion. This accreditation gives contractors and homebuilders the flexibility to install continuous loop, on-demand recirculation, and traditional plumbing systems.
The material can be used
as a drop-in replacement for cross-linked polyethylene (PEX), with minimal tooling changes. “It’s a flexible piping solution that is leak-free, easy to install, and delivers hot water using less energy,” said Talu. ❙
www.dow.com
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