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Mark free by special treatment at the molecular level！
●By using a special treatment on the rubber (suction cup) to improve its
surface, adhesion of foreign matters on the suction cup is greatly reduced as no
particles of the suction pads will be transferred to the workpieces.
Comparison
Work piece: glass
NBR
RA
Principle
By using special treatment, the intermolecular bond of the rubber becomes stronger. By strengthening the intermolecular bond, we have succeeded in reducing adhesion of suction-pad particles on the workpieces.
Special treatment
Note：Please note that, depending on the workpieces, usage conditions and the environment,
the effectiveness may vary and that, in certain cases, the use of these suction cups may have no effect.
Optimum for conveying glass sheets
and other workpieces that need to be free from marks.
For various shapes cups.
●If this suction cup material is used for fluorine rubber and conductive
fluorine rubber, suction cups of any series can be used（exclude a few model）.
| Symbol | Material | Hardness （A/s） | Ambient temperature （℃） | Color | Volume resistivityNote1.2 |
| F-RA | Mark free fluorine rubber | 70 | -10～230 | Black with white dot | – |
| FE-RA | Mark free conductive fluorine rubber | 70 | 0～200 | Black | 104～107 Ω・cm |
Note1) Volume resistivity shows conductivity, resistance value is per ㎤.
Note2) It is the measured value of in our designated test piece.