MACHINERY | TWIN SCREW EXTRUDERS
Feddem’s LFT pultrusion line arrangement showing, from left: creel rack (1), MTS extruder (2), tensioner (3), impregnation die (4), water bath(5), forming roll (6), belt puller (7) and pelletiser (8)
line, such as the fibre tensioner, impregnation die, and belt puller. “The target was to develop a impact resistance, compressive strength, creep resistance and burst strength – compared with normal PVC pipes of equivalent dimensions,
Padmanabhan says. “This development opens a very significant market, hitherto inaccessible to plastics pipes in applications other than fluid transmission,” he adds. Steer intends to license the process. Also looking downstream is Polimer Teknik, which says it has been focusing on in-line com- pounding and production of composite panels with its Poex series of twin screw extruders. These panels are formed by bonding two metal skins to either side of a flame retardant thermoplastic core.
Long fibre focus Several equipment makers are increasing their attention on systems for production of long fibre-reinforced thermoplastics, LFTs. Feddem, for example, has expanded its ICX (Innovative Com- pounding and eXtrusion) Technology to include pultrusion process technology for production of such compounds. It says the development of its own pultrusion technology was mainly focused on the optimisation of various components along the
turnkey solution, capable of producing high quality LFT compounds with an efficient production process and providing a high degree of flexibility,” says a representative. Feddem’s MTS twin-screw extruder is said to
ensure a gentle compounding process of the polymer melt for LFT production. The company says it carried out the development together with the sister company Akro-Plastic, which is already using the technology to produce its own LFT compounds. The two companies will present the technology at NPE 2018. Feddem is not alone in working in this area.
Several other companies are already active in marketing systems for LFTs (CW May 2016) and they will soon be joined by Sino-Alloy Machinery. The Taiwanese company says it is now very close to concluding its own development. “We’ve been spending most of our resources [in recent months] on getting a new LFT factory built and past its inspections,” says Donald Stephens, International Representative for the company. “We will then work on installing our first 32-strand LFT line.” Stephens says the factory will be the new home for Sino-Alloy’s compounding R&D. “Not only are we [an equipment] manufacturing company, but we also have Polyalloy, which is our specialty compounding firm. This allows us to share resourc- es. We’ll also use the new factory to showcase our LFT machines,” he says.
Steer’s fractional geometry screw design is said to allow better distribu- tion of glass in reinforced PVC pipe compounds, resulting in improved performance. It showed some pipe examples at the PlastIndia trade show
28 COMPOUNDING WORLD | March 2018
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.centuryextrusion.com �
www.extricom.de �
www.entek.com �
www.leistritz.com �
www.jsw.co.jp/en �
www.smplatek.com �
www.coperion.com �
www.kraussmaffeiberstorff.com �
www.steerworld.com �
www.polimerteknik.com/en �
www.feddem.com �
www.sinoalloy.com
www.compoundingworld.com
PHOTO: STEER
PHOTO: FEDDEM
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