Rajoo Engineers Ltd.


Rajoo Engineers now commissions the 9th
5-Layer ‘Fully Loaded’ Blown Film Line, and redefines barriers for barrier films used in lamination and liquid packaging.

Innovations in technology have always been an area of comfort for Rajoo Engineers. The commissioning of the 9th 5-Layer Fully Loaded Blown Film Line at Polypet, Nagpur, by Rajoo would go down as one of the finest landmarks in the history of Indian manufacturing of extrusion machinery. The domain of five layer blown film lines with nylon and EVOH was until now dominated by European and Canadian manufacturers, would now-on witness new market dynamics.

Polypet, Nagpur performed a thorough evaluation of all options, including the Canadian and European manufacturers, before deciding that Rajoo was the best suitor - keeping in mind product, quality, service, satisfaction with earlier supplied plant by Rajoo and an overall handholding - aspects that add immense value to the buyer, giving him confidence. With this, Rajoo Engineers now redefines barriers for barrier films used in lamination and liquid packaging, in the domestic and global markets.

The five layer plant with 2 x 60 mm grooved feed extruders for the inner and outer layers and 3 x 55 mm smooth bore extruders is equipped with a 400 mm UCD® die ( stack type with horizontal melt flow paths) and IBC system. ‘To ensure precise and accurate blend and gsm control for each material, we have successfully integrated a 14 component integrated conveying, gravimetric blending and dosing system from Germany,’ says Sunil Jain, President, Rajoo Engineers. ‘Thickness profile, another critical parameter in blown film applications is also well controlled with the state-of-the-art Automatic Profile Control System,’ he adds.

The thickness is measured using two solid state high definition capacitive sensors with 0.1 micron resolution especially designed for nylon and EVOH that are mounted on a rigid O-frame scanner which in-turn is mounted after the nip rollers, when the film is substantially cooler. The film is wound on a back-to-back dual station load cell controlled surface winder with taper tension control producing 1 m diameter rolls.

The machine is operated through an integrated touch-screen based supervisory control system for all the machine parameters such as:
• Processing temperatures
• Extruder speeds
• Melt temperature and pressure
• Calibrating basket diameter and height
• Oscillating haul-off speed
• Material recipes
• Historical data recall, etc.

The machine effortlessly produces 75 micron barrier film with 15 micron nylon and 1010 mm layflat width, providing an output of 240 kg/hour, thickness variation under ± 4% on 2 sigma and width variation of less than ±3 mm.

With this, Rajoo has again raised its bar of performance and continues launching such pioneering innovations. This commissioning has endorsed Rajoo’s leadership status in the industry. The confidence and the trust reposed by customers in Rajoo, its products and service backup is evident by the fact that Polypet who were also earlier operating a 3 layer blown film plant has ordered yet another 3 layer blown film plant scheduled to be supplied to them early next year.