POROBAND ® 2928 consists of highly absorbent mica paper based on unclaimed muscovite reinforced on one side with glass cloth, and a small amount of modified Bisphenol-A epoxy resin.  POROBAND ® 2928 does not contain any accelerator or hardener and is used when the impregnation resin itself contains an accelerator.  Bond contact is slightly increased for best workability when cutting and taping around narrow corners.  The uncalcined mica paper is responsible for the high quality porosity of the tape which gives a quick penetration of resin through a big number layers without leaving cavities.  The mechanical and electrical properties of the final insulation are determined mainly by the used resin.

Applications

POROBAND ® 2928 is used for continuous insulation of coil and bars of low and high voltage machines as well as interlayer insulation in dry type transformers when vacuum pressure impregnation-system is used.

Format

Rolls

‍maximum width 1000 mm

‍Tapes

‍from 10 mm width upward

Storability

24 months at 5 °C
12 months at 20 °C

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