Kapton®/ Nomex® End Caps, non-shrinking, class H (180 °C)

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End Caps, non-shrinking, for insulation in varnish-impregnated electric motors of temperature class H.

Available with inner diameters from 2.00 mm and with wall thicknesses from 0.0350
Five-layer composite of DuPont™ Nomex® 411 and Kapton® results in high dielectric strength and high mechanical stability.
The materials are UL recognized
Suitable for use in temperature class H up to 180 °C.

The multi-layer, non-shrink End Caps made of DuPont™ Kapton® film and Nomex® are designed for use in paint-soaked electric motors. Two layers of Nomex® type 411 form a composite with a protective layer of three layers of Kapton®. The non-calendered, inner insulation takes on the properties of the impregnating varnish during impregnation, thus increasing the dielectric strength and mechanical stability of the End Caps. The penetrated impregnating varnish also secures the End Caps in position. The End Caps retain their mechanical and electrical properties even at high temperatures. The ultrasonic welding of the End Caps is chemically resistant and contributes to the robustness of the Products. These non-shrink End Caps are very suitable for use in series production where easy processing is required. They are mainly used in electric motors, aviation and the automotive industry.

Art.-Nr.

Description

Technical Specifications

Outer Lamina: DuPont™ Kapton® HN

Electrical Properties
Property		lm Typical Value – 1 mil (25 µm)			Test Condition	Test Method
Property		-195 °C	25 °C	200 °C	Test Condition	Test Method
Short Term
Dielectric strength	[kV]	10.8	7.0	5.6	60 cycles	ASTM D 149-64
Dielectric Constant		–	3.5	3.0	1 kilocycle	ASTM D 150-64T
Dissipation Factor		–	3	2	1 kilocycle	ASTM D 150-64T
Volume Resistivity	[ohm/m]	–	1016	1012	–	ASTM D 257-61
Surface Resistivity	[ohm/sq]	–	1016	–	50% Relative Humidity	ASTM D 257-61
Corona Start Voltage	[volts]	–	465	–	50% Relative Humidity	ASTM D 1868-61T
Insulation Resistance	[megohm/F]	–	100000	–		Based on 0.05 µF wound capacitor using 1-mil (25 µm) H

Physical Properties
Property		Typical Value 1 mil (25m) lm			Test Method
Property		-195°C	25°C	200°C	Test Method
Ultimate Tensile Strength (MD)	[kg/m2] [MPa]	2450 241	1750 172	1200 117	ASTM D 882-64T
Yield Point (MD)	[kg/cm2] [MPa]	–	700 69	420 41	ASTM D 882-64T
Stress to Produce 5% Elongation (MD)	[kg/cm2] [MPa]	–	910 90	600 59	ASTM D 882-64T
Ultimate Elongation (MD)	[%]	2	70	90	ASTM D 882-64T
Tensile Modulus (D)	[kg/cm2] [MPa]	35800 3500	30000 2950	18200 1800	ASTM D 882-64T
Impact Strength	[kg/cm] N/m]	–	6 0.6	–	DuPont™ Pneumatic Impact Test
Folding Endurance (MIT)	cycles	–	10000	–	ASTM D 2176-63T
Tear Strength – Propagating (Elmendorf)		–	878	–	ASTM D 1922-61T
Tear Strength – Propagating (Graves)	[g ] [N]	–	510 5	–	ASTM D 1004-61
Bursting Test (Mullen)	[kg/cm2] [kPa]	–	5.25 517	–	ASTM D 774-63T
Density	[Mg/m2]		1.42	–	ASTM D 1505-63T
Coefficient of Friction Kinectic (Film-to-Film)		–	0.42	–	ASTM D 1894-63
Refractive Index (Becke Line)		–	1.78	–	Encyclopaedic Dictionary of Physics, Volume 1
Area Factor	[m2/kg]	–	28	–	Calculation

Thermal Properties
Property	Typical Value – 1 mil (25m) lm	Test Condition	Test Method
Melting Point	None
Zero Strength Temperature	815°C	1.4 kg/cm2 (138 kPa) load for 5 secs	Hot Bar (DuPont™ Test)
Cut-throughTemperature	435°C 525°C	25 µm 50-125 µm	Weighted Probe onHeated Film (DuPont™ Test)
Coefficient of Thermal Expansion	2.0 x 10-5/K	-14°C to 38°C	ASTM D 696-44
Coefficient of Thermal Conductivity [cal)] [cm]	3.72×10-4 [cm2][s][°C] [0.156W/m/K]	25 °C	Model TC-1 000 Twin Heatmeter Comparitive Tester
	3.89×10-4 ([cm2][s][°C] [0.163W/m/K]	75 °C
	4.26×10-4 [cm2][s][°C] [0.178W/m/K]	200 °C
Flammability	Self-extinguishing	–
Heat Sealable	No	–
Thermal Capacity	0.261 cal./g/°C (1092 J/kg/K)	40 °C	Differential Calorimetry

Inner Lamina: DuPont™ Nomex® Grade 411

Electrical Properties
Property of Base Material	Material Thickness		Test Condition	Test Method
Property of Base Material	0.130mm	0.180mm	Test Condition	Test Method
Dielectric Strength [kV/mm]	12	12	AC Rapid Rise	ASTM D 149
Dielectric Constant	1.3	1.3	1000 Hz	ASTM D 150
Dissipation Factor	0.005	0.005	1000 Hz	ASTM D 150

Physical Properties
Property of Base Material	Typical Value	Test Condition	Test Method
Tensile Strength
MD [N/cm] TD [N/cm]	17	28	ASTM D 828-60
MD [N/cm] TD [N/cm]	9	17	ASTM D 828-60
Elongation
MD [%] TD [%]	3.5	3.5	ASTM D 828-60
MD [%] TD [%]	4.8	5	ASTM D 828-60

Item number:

Example: IENKN0100/005/0050
IENKN = master number
0100 = 1.00 mm inner diameter
005 = 0.05 mm wall thickness
0050 = 50 mm inner length (without protrusion)