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About Electrical Insulation and Dielectric Materials
Electrical insulation and dielectric materials includes various forms of materials that surround and protect electrical conductors and prevent unwanted current flow, leakage or crosstalk. Electrical specifications include electrical resistivity, dielectric strength, and dielectric constant. Resistivity is the longitudinal electrical resistance (ohm-cm) of a uniform sample of unit length and unit cross-sectional area. Dielectric strength is the maximum voltage field that electrical insulation and dielectric materials can withstand before electrical breakdown occurs.
Electrical insulation and dielectric materials are available in many different material forms. Choices include adhesives, bar stock, blankets or batts, blocks, braided products, casting resins, ceramic or inorganic materials, coatings, composites, and dielectric coatings. Adhesives require clean surfaces for joining. Bar stock usually has a square cross-section; however, stock forms in other shapes are also available. Blankets or batts (batting) are made of thick layers of woven and/or non-woven fabric sheets. Blocks are building materials or masonry units that have a rectangular shape. Braided electrical insulation and dielectric materials are suitable for thermal insulation fabrics.
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