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Cast polyamide is a partially crystalline thermoplastic which is produced by means of anionic polymerisation of the raw material Caprolactam. In a pressureless casting process the liquid monomer is polymerised via a controlled chemical reaction directly to a semi-finished product. As already described, cast polyamides show a number of advantageous qualities when compared to those of extrusion manufacture. Polyamides produced by means of this process:
By means of additives, e.g. solid lubricants or heat stabilisers, and modifications to the polymer matrix, the typical properties of cast polyamide can be adjusted for specific applications. Thus a tailor-made material can be offered for a wide range of applications. Polyamide 6 G (PA 6 G) Standard quality for high wear demands on engineered components for machines and equipment. Oil-Filled (PA 6 G oil) PA 6 G with integrated lubrication, self-lubricating effect, improved wear resistance. PolyGlide (PA 6 G solid lubricants) PA 6 G with solid lubricant additives, self lubricating effect, very low friction. Polyamide Heat stabiliser (PA 6 G HS) Basically comparable with standard quality but with heat stabiliser to protect better against thermal oxidative degeneration. Polyamide 6 G molybdenum disulphide (PA 6 G MoS2) Basically comparable to standard quality but with higher degree of crystallinity due to molybdenum disulphide additive. |
Cast Polyamide |
| Item Code: PA-6G Polyamide 6 G (PA 6 G)This standard quality manufactured in monomer casting process is, due to its balanced mechanical properties and its excellent mechanical features is the ideal construction material for a wide range of applications. Cast Polyamide 6 is superior to extruded Polyamide 6 in its:
Very good sliding properties mean that PA 6 G is the classical slider material for highly loaded machine components. Among these are bearing bushes, slider pads, guide pads as well as gears and sprockets. Because of the low coefficient of friction only an initial lubrication is generally needed. Often lubrication can be dispensed with altogether. High wear resistance at low and medium speeds, in particular under rough conditions (e.g. dust or sand contamination in the bearings) are further characteristics of PA 6 G as a sliding material for bearings. Contrary to conventional bearing materials such as cast iron, steel or bronze a much longer running life can be achieved under rough conditions. Good damping properties for the reduction of vibration and noise, particularly in the case of wire rope and conveyor rollers are of particular interest. PA 6 G reduces vibration which is transferred from metallic rollers to shafts, bearings and machine frames. In the same way, use of friction bearings of PA 6 G allows reduction of the vibration affecting the machine frame. This way the life of machines and their parts can be extended. Furthermore a contribution is made to lowering machine noise. Low specific weight reduces component weight compared to that of metallic materials. This is of particular interest where parts rotate and centrifugal force is generated. This is considerably reduced due to the lower weight, and also reduces the associated unbalances and vibrations. The greatly reduced weight often reduces even the required drive power. Furthermore, handling and assembly of large parts is made much easier. Good machining, dimensional stability, low residual stress allow production of complex engineered components and application in all design areas. Machining can be performed with standard tools and conventional machines for wood and metal working. High feed and cutting speeds promote cost-effective production. |
Cast Polyamides (Oil-Filled) |
| PA 6 G + Oil Oil-Filled is a high crystalline modification of PA 6 G, manufactured in the monomer casting process which, through the addition of oil and stabilisers, is specially designed for sliding applications. Contrary to the standard quality PA 6 G, Oil-Filled features a good combination of properties. Excellent sliding properties make Oil-Filled a special friction bearing material for highly loaded slide and wear parts in machines and equipment. Due to the lubrication and additives in the material, a sustainable lubricating effect is achieved given for the whole life cycle. Compared to the standard quality, a 50 % reduction in friction is achieved, thus producing less frictional heat and considerably higher peak load capacity. Also the undesirable stick-slip tendency is reduced. Extraordinary wear resistance is achieved by the fine crystal microstructure of Oil-Filled generated by the additives. Compared with standard quality, the reduced frictional heat as well as the reduced friction coefficient makes application possible at higher speeds and surface pressures. This applies not only for dry running but also for running under emergency conditions. Lower moisture absorption and dimensional stability are the result of the high crystalline molecular structure and the special additives. The low moisture absorption leads better dimensional stability and less of a reduction in the mechanical values due to moisture. Typical applications: Bearings Guide rails Sprockets and chain guides Slide rails Feeder wheels Actuators Curve guides Slider pads, strips, sheets Guide pads and strips Castors Gears, gear racks and sprockets Spindle nuts for threaded spindles Thread guides and other components PA 6 G + SOLID LUBRICANTS PolyGlide is the latest self-lubricating polyamide material from specialty bearing materials. PolyGlide is a cast polyamide with special additives and solid lubricants with careful selection of integrated additives with focus on sliding properties. Their balanced combination allows for a friction coefficient of 0.15 μ which is extraordinarily low. Furthermore, the tendency for stick-slip is reliably reduced to a minimum. Lifetime self-lubrication The homogenous distribution of additives and lubricants and the complete saturation of the basic product with lubricant offer unique benefits compared to traditional bearing materials. They ensure that self-lubricating effects and sliding properties are maintained at a constant and stable level from the first moment of operation to the last. Lubricant which is forced out of the bearing area during operation can be replaced by fresh lubricant released from the material. Additionally, the base material PA 6 G guarantees excellent wear resistance and ensures the usual good and uncomplicated machining of the material. PolyGlide is in demand in the areas that call for exceptionally good sliding properties, particularly under high loads and at high sliding speeds. Applications of PolyGlide are similar as that of PA 6 G (Oil-Filled) with High Performance Output Ratio. PA 6 G HS PA 6 G HS (Heat Stabilized) grade offers a 20°-30° C higher continuously allowable service temperature. Its resistance to thermal-oxidative degradation and heat-aging performance is excellent. PA 6 G MoS2 Molybdenum Disulphide (MoS2) is added evenly throughout the PA 6 G polymer matrix to improve its load carrying capabilities. It offers improved UV-resistance and good sliding characteristics. The impact and fatigue resistance inherent to unmodified PA 6 G remains unchanged. |
Mr. Girish Dhawan
(Proprietor)
No. 170, Gali Bandook Wali, Ajmeri Gate
New Delhi,
Delhi -
110 006,
India
Telephone:+(91)-(11)-23215389/ 32972567
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