Processors involved in the building and construction market read often of the demand for their services in the developing world, but rare is that fact so obvious as during a recent open house in Vietnam, hosted by a prominent plastics pipe processor and its extrusion equipment supplier. More than 450 international guests journeyed to Haiphong, Vietnam to learn more about the technology and trends shaping this market.
Hosting the open house from August 4-5 at its Haiphong facilities was Vietnamese pipe producer Tien Phong Plastic, in cooperation with battenfeld-cincinnati (Vienna, Austria and Bad Oeynhausen, Germany), a leading manufacturer of extruders and extrusion systems, plus partners polyolefin's supplier Borouge and plastics supplier Mitsubishi. The state-owned plastics processor is one of the leading producers of pipes and fittings made from u-PVC, HDPE and PP-R in Vietnam.
The processor runs three facilities three factories and claims annual extrusion capacity of up to 75 tons. According to its website it also is in the midst of building a much larger new facility in northern Vietnam. It is part of a joint venture, Tien Phong Plastic Joint Venture - SMP, in Laos, the biggest plastic processor in the country, with the strategic target of that JV to supply products for water supply and drainage projects in Laos.
Among highlights shown by Tien Phong Plastic was its new KryoSys pipe line for large diameter polyolefin (PO) pipe extrusion. The open house began with the demonstration of a battenfeld-cincinnati 1200 mm GreenPipe (energy efficient) extrusion line with a maximum output of 1400 kg/h, producing pipes for water and sewage applications with a wall thickness of 57.2 mm. This was followed by technical presentations illustrating the process and materials, presented by Tien Phong, battenfeld-cincinnati Borouge and Mitsubishi.
The showcased GreenPipe extrusion line consists of a monos+ 90-37D single screw extruder with AC motor, a KryoS 63-1200 pipe head, a CE 30 co-extruder for color stripes, and the necessary downstream equipment for pipe sizes up to 1200 mm: two vacStream 6 m single-chamber vacuum tanks, two coolStream 6 m cooling baths, a pullStream haul-off with 10 caterpillars and a cutStream swarfless planetary cutting unit.
According to battenfeld-cincinnati, the internal melt and pipe cooling system employed in its KryoSys extruders enables a reduction in cooling length of almost 50% compared to a conventional extrusion line. Despite the short cooling length, sagging effects also are said to be reduced due to the internal melt cooling already in the die head.
The KryoSys system was first introduced in 2008. Its main feature, the KryoS pipe head, is based on a spiral mandrel die and comes with a special melt cooling system that makes it possible to start cooling the melt in the die. In the system the pipe itself is cooled simultaneously from the outside and the inside by a combination of water and air cooling.