Fluoroelastomer Centre
ZruElast® FPM Compounds
Zrunek mixes all its compounds in-house. As demonstrated before, all formulations first are developed and then get tested in our own laboratory. Over the years, a standard program of different compound types has been developed, which in the meantime has proved itself many times over.
Characteristics and properties of these compounds are shown in table 1. Zrunek's standard program differentiates 3 categories of compounds: The first category includes the standard compound types used for the manufacturing of black all-purpose parts, eg. cords, hoses, tubes or molded parts. These materials cover a durometer range from 55-90 Shore A. Compounds of the second category are used for colored parts. The third category shows compounds which have to meet specific requirements in demanding applications. The common durometer range for FPM parts is 60 to 90 Shore A.
If you need softer seals with a lower hardness but want to retain favorable compression set values, technical realization could become difficult. Especially to meet these requirements Zrunek developed compound #70157 (42 shore).
If the volume swell of our standard compounds caused by some specific media is too high for your applications, we also can provide special formulations to better meet your needs. A typical example is the exposure to methanol. If, for example, your application requires higher resistance to swell in methanol or toluene, compound #7003 or #7009 would deliver better performance and be the compound of choice.
For food grade applications, there are white and black compounds, e.g. #7023 and #70160.
#70189 is the best choice for the low temperature resistance (down to -40 °C!).
| Mi.No. | Duro meter |
Price | Comments |
| Black Standard Compounds | |||
| 7555 | 57 | ++ | Standard compound for all-purpose applications, such as cords, hoses, tubes, molded parts and seals |
| 7560 | 62 | ++ | |
| 7565 | 67 | + | |
| 7575 | 77 | + | |
| 7586 | 87 | + | |
| Coloured Standard Compounds | |||
| 7765 | 67 | +++ | Standard compound for red applications or other coloured applications |
| 7775 | 77 | ++ | |
| 7690 | 90 | ++ | |
| Advanced Compounds | |||
| 70157 | 42 | +++ | Lowest durometer, good compression set |
| 7023 | 77 | ++ | Food grade, conform with FDA 21 CFR 177.2600 |
| 70160 | 72 | ++ | Certifiied according to EC 1935/2004 and FDA 21 CFR 177.2600 |
| 7003 | 77 | +++ | Advanced resistance to chemicals and methanol |
| 7009 | 79 | +++ | Exceptional chemical and hot water/steam resistance |
| 70189 | 75 | +++++ | Best low temperature resistance up to -40 °C (TR 10) |
