Kalrez® 7075UP perfluoroelastomer parts are a black product targeted specifically metal CVD applications. It offers outstanding thermal stability, very low outgassing and excellent compression set properties. Kalrez® 7075UP exhibits excellent seal force retention, has good mechanical properties and is well suited for both static and dynamic sealing applications. A maximum application temperature of 327°C (620°F) is suggested. Short excursions to higher temperatures may also be possible. Ultrapure postcleaning and packaging is standard for all parts made from Kalrez® 7075UP.
Polymer Name: Perfluoroelastomer (FFKM)
Physical Form: Seals, Valve Seats, O-rings
Features: Good Mechanical Properties, Good Seal Force Retention, Excellent Resistance To Plasma Radicals, Good Compression Set, Good Thermal Stability, Low Outgassing
End Uses: Valves, Valve Parts, Semiconductor Applications
Color: Black
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Identification & Functionality
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Kalrez® 7075UP Features & Benefits
Product Highlights
Outstanding thermal stability
• Very low outgassing
• Excellent resistance to ClF3
• Excellent (low) compression set properties
• Excellent seal force retention properties
• Excellent response to temperature cycling effects
Performance Characteristics
Compression Set/Seal Force Retention
Figure 1. Compression Set at 204°C (400°F) *
Figure 2. Seal Force Retention at 200°C (400°F)
Outgassing
High heat and temperature spikes can degrade elastomeric seals causing their crosslinking structure to become irreversibly damaged. In addition elastomeric seals can degrade under high temperatures causing outgassing to occur, thereby contaminating the process environment. The result is unscheduled downtime, or even worse, product loss. Figure 3 shows the outgassing properties of Kalrez® 7075UP versus Kalrez® 8475, Competitive FFKM D8 and a typical FKM product. Kalrez® 7075UP exhibited the lowest total outgassing rate.
Applications & Uses
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Plastics & Elastomers End Uses
Properties
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Physical Form
Mechanical Properties
| Value | Units | Test Method / Conditions | |
| Modulus (at 100% Elongation) | 11 | MPa | ASTM D 412 |
| Tensile Strength | 17.2 | MPa | ASTM D 412 |
| Elongation (at Break) | 138 | % | ASTM D 412 |
| Hardness (Shore A) | 75 | - | ASTM D 2240 |
| Compression Set (Pellet Type 1, at 204°C, 70h) | 10 | % | ASTM D 395B |
| Compression Set (O-Ring AS568-214, at 204°C, 70h) | 13 | % | ASTM D 1414 |
Typical Properties
| Value | Units | Test Method / Conditions | |
| Maximum Service Temperature ¹ | 327 | °C | - |
| Lowest Service Temperature ¹ | -18 | °C | - |
Thermal Properties
| Value | Units | Test Method / Conditions | |
| Glass Transition Temperature (at 10°C/min) | -1.6 | °C | ASTM D 3418 |
| Coefficient of Linear Thermal Expansion | 2.83 | E-4/°C | ISO 11359-1/-2 |
| Retraction Temperature (TR-10) | -4 | °C | ASTM D 1329 |
Other Properties
| Value | Units | Test Method / Conditions | |
| Density | 1.99 | g/cm³ | ISO 1183 |
Note
- [1]: DuPont proprietary test method; useful temperature range may vary with seal design and application specifics
Kalrez® 7075UP
DuPont