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TORLON 4435 PAI IS DESIGNED FOR PERFORMANCE IN NON-LUBRICATED, HIGH PV APPLICATIONS
04 March 2002 - Solvay Advanced Polymers Llc
| Solvay Advanced Polymers, L.L.C. today announced the introduction of a new grade of TORLON polyamide-imide material. The new material, designated TORLON 4435, is specifically designed to provide exceptional wear performance in non-lubricated, high-PV applications. Not only is new TORLON 4435 particularly suited to applications where lubrication is impossible or undesirable, it provides an additional margin for the continued operation of lubricated systems in the event that lubrication is lost. |
A high-PV environment is one in which the pressure on a moving part multiplied by the part’s velocity results in a composite measurement in the range from 50,000 to 100,000 psi-ft/min. Typical applications that operate in this regime are rotating or sliding components of automotive and industrial machinery, such as bearings, bushings, seal rings, wear pads, and piston rings. Initial testing has demonstrated that parts made of TORLON 4435 exhibit excellent wear resistance across the complete envelope of non-lubricated high PVs, from low pressure-high velocity conditions (125 psi and 800 ft/min) to those of high pressure and low velocity (2,000 psi and 50 ft/min). Polymers that can operate in this extreme environment can save both cost and weight as replacements for the metal parts traditionally used in such applications. Surviving at high PV
The key to the durability of TORLON 4435 at non-lubricated high PVs is its ability to maintain its good mechanical properties at high temperature. The glass transition temperature of this new polyamide-imide material allows parts to operate continuously at temperatures up to 260°C. By comparison, two other materials often specified for stress-and-motion applications have individual shortcomings that hinder their success at the extremes of temperature or pressure. Polyetheretherketone materials tend not to survive in conditions above 75,000 PV without additional lubrication, because their mechanical properties are seriously compromised at heats above a glass-transition temperature of 145°C. Conventional polyimide materials, while they have excellent wear performance, can lack sufficient mechanical strength to maintain integrity under non-lubricated, high-pressure conditions. Increasing performance, reducing cost
TORLON 4435 is formulated with a proprietary lubricant package that extends the range of PV performance available from the product family. Other grades of TORLON PAI are suitable for moderate pressure-velocity environments, those ranging from 25,000 to 50,000 PV. In addition, the new 4435 grade is a
thermoplastic material that can be formed into a net shape by injection molding. Some polyimide materials require sintering into stock shapes and machining to finish, which can result in higher production costs without delivering corresponding performance advantage.
http://www.solvayadvancedpolymers.com
About: Solvay Advanced Polymers Llc
Solvay Advanced Polymers Llc is a subsidiary of Solvay America Inc, the US holding company of Solvay SA. The company produces high-performance polymers that are used in a wide range of demanding applications in the automotive, aerospace, industrial, foodservice, medical, and electronics industries worldwide.Solvay SA is an international pharmaceuticals and chemicals group with headquarters in Brussels, Belgium, employing about 30 000 people in 50 countries. In 2003, its consolidated sales amounted to EUR 7.6 billion, generated by activities in its three major business sectors: chemicals, plastics and pharmaceuticals. Solvay SA is listed in the Euronext 100 index of top European companies.
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