SynTherm® – Insulating Materials SynTherm® YT56 DDP

SynTherm® YT56 DDP is a synthetic medium density electro-insulation paper constructed of a calendered, aromatic polyamide fibride flock composition. Both sides of the paper are printed with a B-stage epoxy resin in a diamond dotted pattern.

SynTherm® YT56 DDP is a synthetic medium density electro insulation paper constructed of a calendered, aromatic polyamide fibride flock composition. Both sides of the paper are printed with a B-stage epoxy resin in a diamond dotted pattern.

The base material SynTherm® YT56 is a Class H (180 °C) insulating material. Its mechanical, thermal and electrical properties are between SynTherm® YT510 and SynTherm® YT511.

Temperatures over 200 °C only slightly influence its electrical properties. The good mechanical properties can be extrapolated to significantly higher temperatures. SynTherm® YT56 is also suitable for use at temperatures to -190 °C due to its polymer-structure.

It has a high short-term dielectric strength. SynTherm® YT56 is compatible with all classes of common resins, varnishes, adhesives as well as transformer liquids, lubricants, and cooling agents. Common solvents may lead to slight reversible moisture expansion. SynTherm® YT56 has low flammability (UL 94V-0) and very high resistance to beta and gamma radiation.

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Application

SynTherm® YT56 DDP is designed for cost critical applications which require a moderate mechanical and electrical strength.
SynTherm® YT56 DDP is used as layer insulation in transformers.

Standards

  • Insulating material class F (155 °C). Base material class H (180 °C)
  • The base material is UL listed (RTI mech. + electr. 210 °C)
  • RoHS compliant acc. to 2011/65/EU

Delivery forms

Film thickness in μm:
130, 180, 300, 510

SynTherm® YT56 DDP is available:
- in tapes: depending on material thickness on request
                 beginning at 6mm (thin material)
- in rolls:   1000 mm

Feathering:
- depth approx. 1 - 12 mm, distance approx. 1 - 10 mm
- 10 mm up to 240 mm tape-width, thickness on request

Base

Calandered, aromatic polyamide fibride flock composition with diamond dotted B-stage resin on both sides.

Technical data

Mechanical
Property Unit of measure         Test method 
Nominal thickness  μm  130 180 300 510  
Typical thickness  µm  130 180 300 500 GB/T12914-2008
Specific weight  g/m²  86 125 245 342 GB/T451.2-2002
Tensile strength longitudinal  N/cm  100 155 300 320 GB/T12914-2008
Tensile strength transversal  N/cm  40 60 145 150 GB/T12914-2008
Elongation at break longitudinal  8 9 12 11 GB/T12914-2008
Elongation at break transversal  8.5 9.5 13 11.5 GB/T12914-2008
Elmendorf tear strength longitudinal  1.5 2.5 5.5 11.5 GB/T455-2002
Elmendorf tear strength transversal  3.5 5 7 14.5 GB/T455-2002
Properties of B-stage resin
Property Unit of measure          
Thickness increase (one side)  µm  10±15 %        
Basic weight increase (both sides)  g/m²  5±10 %        
Curing conditions  1 3 10 20 30
Curing conditions  °C  130 120 110 100 90
Shelf life    6 months after production        
Electrical
Property Unit of measure         Test method 
Nominal thickness  μm  130 180 300 510  
Field intensity  kV/mm  11 11 15 13 GB/T1408.1-2006