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Polypet has taken a 5-layer line from extruder systems manufacturer Rajoo Engineers. For Polypet this is the ninth 5-layer line in its program, and the system will be used to process barrier films.

PlasticsToday Staff

December 30, 2009

1 Min Read
Film extrusion: Polypet expands with new 5-layer line; 3-layer on order

Polypet has taken a 5-layer line from extruder systems manufacturer Rajoo Engineers. For Polypet this is the ninth 5-layer line in its program, and the system will be used to process barrier films.

Rajoo (Rajko, India) highlights the line as symbolic of its ongoing push into the barrier-film-line market, which as yet has been dominated by European and North American film extrusion manufacturers. The line acquired by Polypet also ran at the Plastindia expo and the processor in fact placed its order during that show. According to Rajoo, it is the first such barrier-film line manufactured in Asia.

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For Polypet (Nagpur, India), the new line from Rajoo includes two 60-mm grooved-feed extruders for the inner and outer layers and three 55-mm smooth-bore extruders for the middle three layers, with film running through a 400-mm UCD (Universal Co-extrusion Die) stack-type die made by Rajoo, and an internal bubble cooling (IBC) system. An integrated conveying, gravimetric blending and dosing system was sourced from a German supplier. Film thickness is measured using two capacitive sensors with 0.1-µm resolution that are mounted on a rigid O-frame scanner, which is mounted after the nip rollers. The film is wound on a back-to-back dual-station surface winder with taper tension control, producing 1m-diameter rolls.

The machine will be extruding 75-µm barrier film with a 15-µm nylon layer and 1010-mm lay-flat width, for an output of 240 kg/hour. Polypet also has ordered another 3-layer blown-film line from Rajoo to pair with one already in operation at the processor. —[email protected]

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