Dref Friction Spinning

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Main Export Markets: North America Mid East/Africa Central/South America Asia Western Europe..And you can see more from Swimming Pool Filters air bag filter yogurt maker electronic mass airflow sensor fram oil filters Hayward Sand Filter Sand Pool Filters aquarium canister filters dust bag filter Dr. Ernst Fehrer, Austria, first developed and patented the DREF friction spinning process for production. Later Rieter, Switzerland, and Dr. Ernst Fehrer, entered a joint agreement to further develop the Dref spinning technology.Contents1 DREF II 2 DREF 3000 3 See also 4 References // DREF IIDREF 2 friction spinning is nothing if not versatile. It can be used for everything from asbestos substitutes and secondary carpet backing yarns, to technical products such as cartridges for liquid filtration.At present, around 80 DREF 2 machines are spinning 30,000 t of yarns for liquid filtration. The main markets are Europe and the USA, where some 150 million filter cartridges are manufactured with DREF 2 yarns, a figure that represents 65-70% of global production.The leading US and European filter producers spin a wide range of DREF 2 PP-yarns at speeds of 160 - 180 m/min. One particular application is for PPFDA washed filters, which are employed in all types of industries from chemicals to pulp and paper, and from cosmetics and pharmaceuticals to nuclear and electrical power. The filter is formed using polypropylene Meraklon fda fibre over a supporting core and can withstand up to 5 bar of differential pressure and temperatures of 80 鐧? The filters come in all lengths from 4??- 40?? and have filtration ratings of 1-150 micrometres.Another example of DREF 2 ubiquity in the filter sector is the use of friction spun yarns for drinking and industrial water, pure water and activated carbon filters. A specialist manufacturer employs DREF products for over 20 types of cartridge that require compatibility with FDA foodstuffs legislation. The yarns employed generally consist of PP fibres in the 3.3 dtex, 40 mm range, which are highly resistant to micro-organisms and have a wide scope of chemical applications.Friction spun yarns offer 20-40% more air volume in the yarn and less flow resistance than flyer yarns, as well as up to twice the service life. The fibre structures are relatively random and subject to high degree of twist. The yarns offer great regularity and increased strength, while their round yarn cross-section ensures limited deformation under transverse load. In addition, production costs are cut by up to 50% through reduced preparation, spinning and personnel expenses. The knot-free, uniform quality of the yarns guarantees fault-free filters and constant micronaire values, with the layered structure creating a hairy surface that is ideal for filtering purposes.All in all, DREF adds up to an economic and qualitative alternative for spinning with a vast range of fibres. Thus providing the universality and flexibility that the market is seeking.[1]DREF 3000Apart from a showcase for the DREF 2000, the ITMA in Birmingham provides the venue for the public launch of the latest FEHRER friction spinning machine, the DREF 3000.At the ITMA 1979 in Hanover, the FEHRER DREF 3 friction spinning machine made its debut, while the ITMA 1999 in Paris saw the unveiling of the DREF 2000, the successor to the DREF 2 series. At the ITMA 2003, this tradition is to be continued with the first public appearance of the DREF 3000, the only spinning system to offer the production of special high-tech, core and multicomponent yarn constructions in the NM 0.5 - NM 25 (cc 0.3 - cc 14.5) yarn count ranges in a single, straightforward working process.The DREF 3000 features include a drafter unit and opening head with infinitely variable drive control, spinning units with two infinitely variable suction spinning drums, take-off and winding units infinitely variable speeds and yarn surveillance, as well as filament guide with monitoring device.The drafter unit can handle all types of synthetic fibres, special fibres such as aramid, FR and pre-oxidised fibres, polyimides, phenol resin fibres (e.g. Kynol), melamine fibres (e.g. Basofil), melt fibres (e.g. PA, PES, PP), natural fibres (wool, cotton, jute, linen, flax, etc.), as well as glass fibres in blends with other materials. The DREF 3000 processes these fibres in the form of slivers composed of one type of fibre, or using slivers with differing fibre qualities at one and the same time. Slivers with a homogenous fibre mixture can also be employed, both alone and in combinations with slivers in a single fibre quality.Apart from these variations, the DREF 3000 is capable of operating with several yarn cores, which are axially fed to the spinning drums. These core yarns are then provided with a fibre sheath and are positioned precisely in the middle of the yarn. Synthetic multi-, mono-, high-strength or texturised filaments; glass, viscose and aramid filaments; steel, copper and brass wires, yarns and pre-yarns can all be used. DREF 3000 core yarns offer high output, breakage-free spinning and weaving mill operation and thus up...(and so on)


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