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pucaro







Flexible Electrical Insulating Materials


Flexible insulating sheets are employed in electrical machines for layer insulation, slot insulation, slot closure and interphase insulation. As a result of the general trend towards increased performance, these materials are subjected to high electrical and thermal stresses. Good mechanical strength is the prerequisite for automatic processing by the customer.

These demands are met in particular by combined flexible insulating materials in multi-layer structures of pressboard, polyester and polymide foils, of aramide papers and various non-woven fabrics.


Product Spectrum of Flexible Electrical Insulating Materials


PUCARO Presspaper, brown E

  • calendered presspaper of 100% sulphate wood pulp
  • various application possibilities in motors and transformers, such as slot lining and layer insulation
  • insulation class A (105°C)
PUCARO Special Presspaper, Grey SS
  • calendered presspaper of 100% sulphate wood pulp
  • high compression, consequently improved mechanical properties
  • various application possibilities in higher-stressed motors and transformers, such as slot lining and layer insulation
  • insulation class A (105°C)
PUCARO DS Presspaper and Triflexil M/DS
  • special presspaper or combination with polyester foil
  • high stiffness, very well suited as slot closure
  • DS presspaper: insulation class A (105°C)
  • Triflexil M/DS: laminate of DS presspaper with a polyester foil, consequently higher temperature resistance: insulation class B (130°C)

PUCARO Triflexil M
  • flexible composite material of special presspaper, grey SS, and high-quality polyester foil
  • especially suited as slot insulation, slot closure and interphase insulation ("Kreppisol")
  • insulation class B (130°C)
PUCARO Triflexil M/VL
  • flexible composite material of polyester non-woven fabric and high-quality polyester foil
  • especially suited as slot insulation, slot closure and interphase insulation
  • smooth surface, consequently good machinability
  • insulation class B (130°C), in the event of impregnating and trickle resins of the appropriate insulation class also employable in insulation class F (155°C)
PUCARO Triflexil M/VL-UE ("DMD")
  • laminate of esterimide-impregnated polyester non-woven fabric and high-quality polyester foil
  • especially suited as slot insulation, slot closure and interphase insulation
  • smooth surface, consequently good machinability
  • very good adhesion with impregnating and trickle resins
  • for insulation class F (155°C)
PUCARO Triflexil NKN
  • laminate of aramide paper (NOMEX) and special polyimide foil (KAPTON)
  • especially suited as slot insulation and slot closure of highly stressed electric motors
  • smooth and abrasion-resistant surface, consequently good machinability
  • very good absorption of impregnating and trickle resins
  • insulation class H (180°C)
PUCARO Baked enamel coatings
  • coating with PUCARO baked enamel green (duroplastic, all over) BL-U (rhombic)
  • application in slot linings and slot closures of stators
  • layer insulation of choke coils and smaller transformers
PUCARO voice coil carrier materials
  • carrier materials coated with PUCARO baked enamel blue or baked enamel green
  • basic materials of pressboard, aluminium, NOMEX and KAPTON guarantee highest thermal and mechanical resistance
    available in original rolls or in strips
  • NOMEX and KAPTON are registered trademarks of DuPont.

PUCARO Special products

  • Triflexil 2.5-M 3-fold with GL 3000 brilliant vanish as high-frequency punch-welding base
  • PUCARO 5-layer material for protective linings in cable sleeves
  • punching paperboard
  • special presspapers for the paper-processing and graphic industries
  • presspapers for the textile industry

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