Polyimide Varnished Glass Cloth----[[LIREN ELECTRICAL INSULATION MATERIALS]]

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Polyimide Varnished Glass Cloth

Description:

LR-251 Polyimide Varnished Glass Cloth is made by the electric alkli-free glass cloth which is impregnated first in polyamic acid and then baked and cyclized.

This product exhibits high temperature-resistance, radiation-resistance, corrosion-resistance and solvent-resistance. Meanwhile, it shows excellent dielectric and mechanical properties, durable service at 200 °C

Application:

LR-251 is suitable for slot and end winding insulating of class C electric motors and widely used in various specific electric motors of military industry.

Technical Data:

Item	Property			Unit	Typical Value
1	Nominal Thickness			mm	0.15	0.20
2	Thickness tolerance			mm	±0.02	±0.04
3	Tensile strength	average		MPa	100	140
		individual			80	120
4	Volume resistivity	Normal		Ω.m	≥1.0×10¹²
		200±2°C			≥1.0×10¹¹
		dipped in water,24h			≥1.0×10¹⁰
5	Breakdown Voltage	normal	average	KV	≥10.0	≥8.5
			individual		≥6.0	≥4.5
		bent at normal conditions	average		≥7.5	≥5.0
			individual		≥5.5	≥2.7
		200±2°C	average		≥8.5	≥5.0
			individual		≥5.0	≥4.0
		dipped in water for 24h	average		≥5.0	≥3.5
			individual		≥4.0	≥3.0
6	Dielectric constant, 50Hz				3-4
7	Dielectric factor, 50Hz				≤5.0×10^-2

Rolls: 3 inch (76mm) Core, max. width 1190mm;

※ Special thickness or combinations can be supplied according to customer.

Shelf Life: To obtain best performance, use this product within 12 months from date of delivery and store under normal conditions of 60º to 80ºF (16º to 27ºC) and 40 to 60% R.H. in the original carton. It still can be used if it passes the test after 12 months.

Notes: The technical information and data, recommendations, and other statements provided are based on tests or experience which we believes to be reliable, but the accuracy or completeness of such information is not guaranteed. Before using this product, you must evaluate it and determine if it is suitable for your intended application.

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