NARA: Within 80 years from powder processing to particle design
NARA Machinery Co. Ltd. can look back to this day at a company history of more than eighty years. Founded 1924 by Jyuzo Nara in Tokyo, Japan, the company has been engaged in the design, fabrication and selling of grinding machines from the very beginning.
Currently Nara has 170 employees worldwide and is still privately owned. Since 1993 the European branch in Frechen, Germany, with its now ten employees is one important part of the company. A crucial factor for the selection of the Frechen site is the very good accessibility for customers from all over Europe by car, train or air. This facilitates customers to join trials in the technical lab or to discuss the feasibility of projects. If materials are very sensitive or dangerous customers also have the chance to rent equipment.
Besides the customer focus NARA Europe constantly has expanded the co-operation with suppliers and sub-contractors in recent years. This network increases the project scope and the services offered while at the same time it decreases the reaction time.
The ever increasing requirements of product quality and functionality demand that the machine manufacturer continuously develops new and improves existing machines and processes. NARA’s answer to these challenges are machines for economic drying, high quality milling and the design of new functional composite materials with for example improved material properties like flowability, dispersibility and humidity. These processes and machines are applied in a wide range of industries including pharmaceutical, food, specialty chemicals and commodities.
The NARA range of products covers the following three unit operations:
Drying: Machines in use for more than 40 years in the chemical industry
Wet and moist powders as well as filter cakes and suspensions can be dried in the Nara dryers. The dried particles have the size from below 1 µm up to 3 mm with moistures from 80% down to 0.01%. Capacities from some 100 g up to 30t/h can be treated. Apart from the Dryer Nara can provide ancillary equipment including process control.
Pharma - Mills: Grinding technology for dry- and wet grinding
In the field of grinding Nara developed a fine mill that is very easy to assemble, disassemble and clean. It is manufactured at a high quality production level to fulfil cGMP conditions. With the development of new grinding tools average particle sizes from 100 µm down to 5 µm are realized. The mill can operate as an open or closed system and is most suited for implementation in isolaters or containments. The latter hermetical closed dry mill systems guarantee minimal operator exposure limits down to below 1 µg at capacity up to 300 kg/h.
For wet grinding or mechanical pulping Nara offers its own wet mill that even can be used as a reactor for micro reaction. It is preferably used for suspension with higher viscosities.
Particle-Design: Specific modification of powder surfaces
The NARA Hybridization system enables its user to fabricate particles with new topological, physical or even chemical characteristics. Due to its universal applicability for all kinds of powders customers are found within the pharmaceutical, chemical, special pigments, cosmetics, plastics, catalysts, special metal and metal oxides as well as in the semiconductors industry. Hybridization is a unique patented process, where micro scale particles are coated with particles down to 10 nanometer. No further additives are needed to promote the coating process. Other machines operating in the special process and the nano field are the Miralo (mechano-chemical processes) and the Laser Ablation system (wet and dry process for nano production and nano caoting).
A different range of particle design and particle size is targeted by the NARA Nebulasizer. It enables the optimisation of granulates of particle size distribution regarding their fine- and coarse rate of dry and wet products. Loose granules from granulation processes in the ceramic and pharmaceutical industry are treated to have a smaller particle size distribution.