Uncalendered Aramid Paper YT 511 – Metastar

Uncalendered Aramid Paper YT 511 – Metastar | High-Porosity Electrical Insulation Paper

Uncalendered Aramid Paper YT 511 – Metastar is a high-performance electrical insulation material developed for applications that require excellent thermal resistance, strong dielectric properties, and superior resin absorption. Its uncalendered structure provides enhanced porosity, allowing deep impregnation with varnishes and resins for improved bonding and long-term insulation reliability.

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Uncalendered Aramid Paper YT 511 – Metastar is a high-performance insulation material designed for applications requiring excellent thermal resistance, high dielectric strength, and superior impregnation capability. Manufactured from high-quality aramid fibers, its uncalendered structure provides increased porosity, allowing resins and varnishes to penetrate deeply for enhanced bonding and insulation performance.

YT 511 – Metastar is widely used in motors, transformers, generators, and other electrical equipment where efficient resin absorption and thermal endurance are essential. Its outstanding resistance to heat aging, chemicals, and mechanical stress ensures long-term reliability in demanding operating environments. The flexible yet strong structure makes it suitable for slot insulation, phase insulation, and interlayer insulation applications.

Engineered for durability and consistent quality, Uncalendered Aramid Paper YT 511 – Metastar offers a reliable, high-efficiency insulation solution for modern electrical and industrial manufacturing needs.

Product Details

Brand

Metastar

Insulation Class

‘H’ & ‘R’

Temperature Rang(°C)

180 – 220 °C

Color

Natural Off White

Thickness (mm)

0.05 – 0.76 mm (2 to 30 mil)

Surface

Smoothly Calendared

Width

10 mm to 1000 mm

Property	Unit	130	180	250	380	580	Test Standard
Typical Thickness	µm	130	170	250	390	600	GB/T451.3
Specific Weight	g/m²	42	64	80	140	205	GB/T451.2
Density	g/cm³	0.31	0.37	0.32	0.35	0.34
Tensile Strength (Longitudinal)	N/cm	25	40	45	62	—	GB/T12914
Tensile Strength (Transversal)	N/cm	13	20	32	48	75	GB/T12914
Elongation at Break (Longitudinal)	%	3.3	3.7	3.5	3.0	4.0	GB/T12914
Elongation at Break (Transversal)	%	4.5	5.0	4.5	3.7	5.0	GB/T12914
Shrinkage at 240 °C (Longitudinal)	%	0.4	0.4	0.4	0.4	0.4	IEC60819-2
Shrinkage at 240 °C (Transversal)	%	0.2	0.2	0.2	0.2	0.2	IEC60819-2
Elmendorf Tear (Longitudinal)	N	1.2	1.8	2.0	4.5	8.5	GB/T455
Elmendorf Tear (Transversal)	N	1.8	3.0	3.5	7.0	9.0	GB/T455
Tensile Strength (Unfold, Transversal)	N/mm²	115	—	—	—	—

Property	Unit	130	180	250	380	580	Test Standard
Field Intensity	kV/mm	9	9	8	8	7	GB/T1408.1
Dielectric Constant (60 Hz)	—	1.3	1.3	1.3	1.4	1.4	GB/T1409

Insulation Class	—	Class H (180 °C)
UL Approval	—	UL listed, RTI 210 °C (E358562)
Operating Temperature	°C	-190 to 200
Available Thickness	µm	130 / 180 / 250 / 380 / 580
Roll Width	mm	1030
Base Material	—	Non-calendered aromatic polyamide flock