Motor Winding Insulation White Paper

Description

Insulating paper is usually a sheet material formed by depositing fibers from plant fibers, mineral fibers, synthetic fibers or their mixtures on a paper machine through water or other media. Insulating paper has high tear strength, low elongation, and good insulation, so it is widely used in insulating materials such as motors, cables, capacitors, and transformers, and is also the main component of insulating materials such as laminates, composite materials, and prepregs.

In recent years, with the development of the power industry, modern power generation equipment and transmission equipment are developing towards high voltage and large capacity. With the rapid development of science and technology in the world, various high-performance synthetic fibers have been developed, produced and used in the paper industry, such as polyester fiber paper, polyaramid fiber paper, polysulfone fiber paper, polyoxadiazole fiber paper, etc. , Has been successfully applied to batteries, transformers, capacitors and other electrical equipment. , especially aramid fiber insulation paper is the most popular and successful.

1. It should have strong flame retardancy.

When the battery insulating paper touches the flame, it has a strong ability to resist burning, or it stops burning when it leaves the flame, because the higher the resistance to burning, the better its safety.
battery insulation paper
2. High-quality battery insulating paper should have high insulation resistance and resistivity.

Resistance is the reciprocal of conductance, and resistivity is the resistance per unit volume. The lower the conductivity of the material, the greater the resistance, and the relationship between the two is reciprocal. For insulating materials, it is always desirable to have as high a resistivity as possible.

3. It should have good tensile strength.

In the tensile test, the sample is subjected to a large tensile stress, which is a very widely used and representative mechanical performance test of insulating materials.

In addition, excellent battery insulating paper should also have good arc resistance. Under specified test conditions, the ability of battery insulating paper to withstand arcing along its surface. The arc resistance of the insulating material is judged by the time required for the formation of a conductive layer on the surface of the insulating material through the action of the arc generated by the high voltage between the two electrodes. The larger the time value, the better the arc resistance.

Item		Unit	Requirement
Thickness		mm	0.15	0.17	0.2	0.22	0.25	0.27	0.3	0.4	0.5
Thickness tolerance		mm	±0.02		±0.03					±0.04	±0.05
Density		g/m2	190±28	215±32	250±38	275±40	310±46	330±50	370±55	490±73	610±90
Film thickness		um	36
Tensile Strength	MD no bending	N/10m m	≥135	≥150	≥170	≥190	≥210	≥240	≥270	≥320	≥410


	MD after bending		≥80	≥90	≥100	≥120	≥130	≥140	≥150	≥230	≥300
	TD no bending		≥80	≥90	≥100	≥110	≥120	≥130	≥140	≥200	≥260
	TD after bending		≥60	≥60	≥80	≥80	≥80	≥90	≥100	≥130	≥170
Elongation	MD	%	≥2		≥3
（%）
	TD		≥8		≥10
Breakdown voltage	Not bending	kV	≥7

	After bending		≥6
Delamination		—	No Delamination, no bubble or other defects
Affected by heat（130±2℃） 10min			No Delamination, no bubble, no adhesive flow
Long-term heat resistance			≥120
(temperature index TI)
Weight and area conversion		m2/Kg	6.23	5.21	4.68	4.24	3.74	3.46	3.12	2.34	1.87