ZTELEC Electrical Insulating Paper Properties for Special Applications

Insulating paper is a thin sheet of insulating material formed by plant fibers, mineral fibers, synthetic fibers or a mixture thereof, which is deposited on a paper machine by water or other medium. It is widely used as an insulating material in m……

Insulating paper is a thin sheet of insulating material formed by plant fibers, mineral fibers, synthetic fibers or a mixture thereof, which is deposited on a paper machine by water or other medium. It is widely used as an insulating material in motors, cables, capacitors and transformers because of its high tear strength, low elongation and good insulation. It is also the main component of insulating materials such as laminates, composites and prepregs.

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It is precisely because of the special use of insulating paper that it must have some characteristics different from other paper types, including mechanical properties, electrical properties and thermal stability. In the actual use of insulating paper, it is often affected by various external forces, so it requires high mechanical properties, including tensile strength and elongation at break.

For insulating paper, thermal stability is also an important indicator to measure it, and it is also a major factor in the generation of low-voltage insulation aging, which determines its service life. Under normal operating conditions, the electric field strength has only a slight effect on the insulation aging process. When the insulating paper is used in a relatively high temperature environment for a long time, it will become brittle due to heat aging, and gradually lose its mechanical and electrical properties.

Insulating paper is commonly used in some electrical equipment, so it must meet certain electrical properties. The electrical properties of insulating paper refer to the polarization, conductance, dielectric loss and breakdown characteristics that occur under the action of an electric field. They are interrelated and cannot be viewed separately.

insulation materials

In the process of selecting and developing materials, it is necessary to comprehensively balance the advantages and disadvantages of various materials in order to produce insulating paper with excellent mechanical properties, electrical properties and thermal stability. Of course, it is necessary to avoid impurities such as metal ions and the presence of bubbles and moisture, and the insulating paper should have high uniformity.

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