Polypropylene insulating film, flame-retardant

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A highly resilient (115°C) insulation film with UL94-V0 flammability and excellent dielectric strength. The film can be obtained as sheet material or (self-adhesive) die-cut parts. As die-cut parts in particular, the film is characterized by good foldability, dimensional stability and compliance with various standard requirements for thickness and tracking resistance. For example, IEC 950 / EN 60950 and UL 1959 require a minimum insulation thickness of 0.4 mm between active electrical parts and earth for insulation in information technology devices (e.g. switching power supplies, insulation 230V connection to chassis). All products in the 278xx series over 0.4 mm thick meet this requirement and are also non-flammable in accordance with UL 94 V0.

Art.-Nr.

Application examples:  Computer technology, monitors, printers, peripherals, consumer electronics

  • Insulation between motherboard and metal housing
  • Isolation between expansion cards
  • Laminated together with metal foil as EMC/EMI shielding
  • in black version additionally as light-proof cover for housing slots

 

Lighting various applications as insulation stampings in emergency lighting, information signs and street lighting  Washing machines, refrigerators, dryers, etc.

  • Reliable separation and the electronics can be completely “packed” into the folded punched parts.
  • as contact protection for live parts
  • Water vapor or water protection

 

Power distribution devices such as overcurrent switches, consumption meters, switch cabinets, measuring devices and switch housings. Used as insulation between earth and operating voltage. The conditions for use are:

  • Good tracking resistance (CTI; 600V), non-flammability (UL94 V0)
  • No hygroscopic properties
  • good dielectric strength (> 6000V) and good temperature resistance (115°C).

  All points are fulfilled by products of group 278xx. Application as insulation between live parts, as a cover for unused connections and in “bus bar” applications. The films can be punched very easily. With appropriate perforations or bending edges, closed “housings” are also possible as flame-retardant insulation. Most products in the 278xx series can also be self-adhesive.  

Technical data:

 

Properties Test method Standard types *) Special types
PP27805 PP27810 PP27817 PP27830 PP27840 PP27862 PP27894BK PP27825BK
Colours — white white — white white — —
black black black black black black black black
Thickness in mm 0,127 0,25 0,43 0,76 1,02 1,57 2,38 3,18
Strength tolerance + 0,025 0,08 0,1 0,05 0,05 0,1 0,1 0,18
Strength tolerance – 0,025 0,04 0,05 0,05 0,05 0,1 0,1 0,18
Mechanical properties
Tensile strength PSI ASTM D 882
Longitudinal direction 4400 4400 4400 4400 4400 4400 4800 4800
Transverse direction 3200 3200 3200 3200 3200 3200 3600 3600
Physical properties
Density ASTM D 792 1,035 1,035 1,035 1,035 1,035 1,035 1,035 1,035
Flammability UL 94 VTM-0 VTM -0 V 0 V 0 V 0 V 0 V 0 V 0
Oxygen content ASTM D 2863 28 28 28 28 28 28 28 28
Water absorption
% change in weight ASTM D 570 0,06 0,06 0,06 0,06 0,06 0,06 0,06 0,06
Relative thermal index (RTI) UL 746 B
Electric 115 ° C 115° C 115° C 115° C 115° C 115° C 110° C 110° C
Mechanical without pressure 115° C 115° C 115° C 115° C 115° C 115° C 110° C 120° C
Electrical properties
spec. surface resistance Ohm / square ASTM D 257 109 to 1011 109 to 1011 109 to 1011 109 to 1011 109 to 1011 109 to 1011 109 to 1011 109 to 1011
Breakdown voltage ASTM D 149 13 kV 22 kV 24.8 kV 32 kV 37.8 kV 45 kV 56.4 kV 62.5 kV
Dielectric strength – Volt / 25.4µm ASTM D 149 2625 2200 1460 1080 945 730 600 500
Spec. contact resistance Ohm -cm ASTM D 257 3,97×1015 3,97×1015 3,97×1015 3,97×1015 3,97×1015 3,97×1015 3,97×1015 3,97×1015
Dielectric constant ASTM D 150 2,3 2,3 2,3 2,3 2,3 2,3 2,3 2,3
Loss factor ASTM D 150 0,0019 0,0019 0,0019 0,0019 0,0019 0,0019 0,0019 0,0019
High-current arc ignition; number; arcs until ignition UL 746A 200 200 162 200 200 200 200 200
High voltage arc trace in / min UL 746A 0 0 0 0 0 0 0 0
Glow wire ignition – sec. UL 746A 9 7 9 12 12 12 30 36
Relative leakage current index – Volt (CTI) 600V = 0 ASTM D 3638 600 600 600 600 600 600 600 600

*) Standard types are also available in smaller quantities

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