Polyimide PI Rod Vespel SP-1 SP-21
2 week ago
Product details
Vespel Polyimide is a product developed by the Vespel Polyimide is a general term for all-aromatic polyimide resin powder and its moulded parts developed by DuPont in the U.S.A. It belongs to the high-performance engineering plastics product series, and is mainly used in the aerospace industry, semiconductor process equipment, OA equipment, industrial machinery and automotive parts and other fields.
The products include SP1, SP21, SP211, SP22, SP3 and other specifications, with optimised properties through filler materials such as graphite, polytetrafluoroethylene (PTFE) or molybdenum disulphide. The basic SP1 offers high mechanical strength and electrical properties, the SP21 series is filled with graphite to improve wear resistance, the SP211 incorporates PTFE to reduce the coefficient of friction, the SP22 uses a high proportion of graphite to reduce thermal expansion, and the SP3 is designed for use in vacuum/inert gas environments. Core features include continuous heat resistance at 288°C, 10 times the PV value of ordinary plastics, creep resistance at 260°C, and metal-grade flame resistance and chemical stability for stable long-term operation without lubrication.
Vespel's high performance resins are the best in terms of heat resistance and abrasion resistance among the high performance resins that Vespel has marketed and mass-produced, and they can be used in non-lubricated conditions (high PV) at a height of 10 times or more without affecting the other materials, so they do not cause any harm.
Classification and Properties
DuPont Vespel is the most typical representative of the polyimide (PI) plastic family.
VESPEL-SP1 (brown): The basic specification offers the highest mechanical strength and electrical properties.
VESPEL-SP21 (black): A 15% graphite-filled specification that provides abrasion properties and heat resistance.
VESPEL-SP211 (black): 15% graphite and 10% PTFE filled to give the lowest coefficient of static friction. Suitable for use in medium temperature environments.
VESPEL-SP22 (black): 40% graphite filled for lowest coefficient of expansion and highest creep resistance.
VESPEL-SP3 (black): 15% molybdenum disulphide filled specification for friction sliding requirements in vacuum or inert gas.
Product Characteristics
1. Heat Resistance: Vespel is heat resistant up to 288°C for continuous use and up to 480°C for short periods of time.
2. Abrasion resistance: Vespel's lubrication-free limit PV value is more than 10 times that of general engineering plastics, and it is highly resistant to both impact abrasion and shaking abrasion.
3. Creep: Creep at 260°C and 186kg/cm2 is only 0.6% for 1000 hours.
4. Deformation of load: 1/70 of PTFE and 1/10 of nylon under 50°C and 140kg/cm2. 5.
5. Chemical resistance: Resistant to grease, oil, and solvent. Like metal, it is not burned.
Application areas
1. Parts for the aerospace industry
2. Jigs and fixtures for semiconductor processes
3. Components for OA machines and various instruments
4. Parts for industrial and textile machinery
5. Parts for automobiles and construction vehicles
Vespel®SP-21 Thrust Washers
Thinner, lighter Vespel® SP-21 thrust washers replace all-metal needle bearings in a new 7-speed AT for rear-drive vehicles
Vespel® thrust washers have been selected to replace larger and heavier metal thrust needle bearings positioned between the clutch casing and aluminum transmission housing.
The Challenge
Good mileage, compact design and fun to drive.
Occupying almost the same space as a 5-speed AT, JATCO Product new 7-speed transmission creates an exciting driving experience for luxury-class, rear-drive vehicles. The AT’s superior response time delivers both exciting acceleration and a quiet, leisurely experience depending on the driver's desire – while still improving fuel efficiency.
The Solution
Reduced size, weight and number of parts
Vespel® SP-21 thrust washers are thinner and lighter than comparable metal thrust needle bearings, helping to reduce the AT’s overall size and weight. In addition, Vespel® SP-21 thrust washers have been selected because they have the ability to rotate directly against the aluminum housing, allowing a reduction in the number of parts and an easier assembly process.
Key Advantages
Superior resistance to heat and wear. Capability of direct contact with aluminum components
Vespel® thrust washers have demonstrated many years of superb reliability in transmission applications due to:
The lack of melting point means the washer will not melt
A high limiting PV value (an indicator of resistance to wear) which is superior to other engineering resins
Low-wear rates when used directly against lubricated aluminum components, even in the presence of contamination or foreign matter in the oil
Custom-designed oil grooves on the washer surface allow precise control of oil flow, further enhancing resistance to wear
The ability to easily form an oil film on its surface which creates a very low coefficient of friction
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Hony Engineering Plastics Limited
Audited supplier
5 year
Main Product:
Plastics Sheet ,
Plastics Rod,
CNC Plastic Machined Parts,
CNC Metal Machined Parts,
Plastics Injection Molding,
Antistatic Material
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