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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.

Attributes

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.

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:   965 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
Nominal thickness  Typical thickness  Specific weight  Tensile strength longitudinal  Tensile strength transversal  Elongation at break longitudinal  Elongation at break transversal  Elmendorf tear strength longitudinal  Elmendorf tear strength transversal 
Unit of measure         Test method 
μm  130 180 300 510  
µm  130 180 300 500 GB/T12914-2008
g/m²  86 125 245 342 GB/T451.2-2002
N/cm  100 155 300 320 GB/T12914-2008
N/cm  40 60 145 150 GB/T12914-2008
8 9 12 11 GB/T12914-2008
8.5 9.5 13 11.5 GB/T12914-2008
1.5 2.5 5.5 11.5 GB/T455-2002
3.5 5 7 14.5 GB/T455-2002
Properties of B-stage resin
Thickness increase (one side)  Basic weight increase (both sides)  Curing conditions  Curing conditions  Shelf life 
Unit of measure          
µm  10±15 %        
g/m²  5±10 %        
1 3 10 20 30
°C  130 120 110 100 90
  6 months after production        
Electrical
Nominal thickness  Field intensity 
Unit of measure         Test method 
μm  130 180 300 510  
kV/mm  11 11 15 13 GB/T1408.1-2006

SynTherm® is a registered trademark of SynFlex.