High temperature kraft paper is a tough water resistant packaging paper with low density and high physical strength, which can provide protection for enameled wire.
Kraft paper, usually yellowish-brown, is made of kraft conifer pulp, soaked in water and beaten on a mesh paper machine. It can be used as cement bag paper, envelope paper, glue sealing paper, asphalt paper, wire protection paper, insulating paper and so on. High temperature kraft paper is used in chemical industry, machinery and other industries, especially widely used in food packaging industry.
High temperature kraft paper is a tough water resistant packaging paper with low density and high physical strength, which can provide protection for enameled wire. Its working environment is usually 190-220 high temperature and 2.5MPa pressure. Oily kraft paper will produce hydrophobicity, can make enameled wire from damp and other risks, prolong the service life of wire.
ZhengZhou LP Industry is providing high quality enameled kraft wire to electrical manufacturers in Europe, America and Asia. The low cost and high efficiency make high temperature kraft paper attractive to more customers in the electrical field. Choosing the right wire insulation material can effectively improve the work efficiency.
Why Use magnet wire insulating paper?
Enameled wire is coated with a thin polymer film. While excellent for space-saving and basic electrical isolation, this primary insulation can be vulnerable. Adding a layer of electrical insulating paper provides:
Enhanced Dielectric Strength: It significantly increases the breakdown voltage between adjacent enameled wires or between coils and the grounded core, preventing short circuits.
Mechanical Protection: The paper acts as a cushion, protecting the delicate enamel coating from abrasion, scratches, and physical stress during the winding process and operational vibration.
Thermal Resistance & Stability: Specialized insulating papers can withstand high operating temperatures, preventing thermal degradation and maintaining insulation integrity.
Environmental Sealing: It helps block moisture, oil, and contaminants from reaching the conductive copper or aluminum, reducing the risk of corrosion and tracking.
Structural Integrity: In transformers and motors, paper helps hold windings in place, providing superior dimensional stability.
When specifying insulating paper for magnet wire application, consider these factors:
Dielectric Strength: Ensure the paper’s voltage rating exceeds your application’s requirements with a safe margin.
Thermal Class: The paper must withstand the operating temperature of the component (e.g., Class A (105°C) to Class H (180°C) and beyond).
Thickness and Caliper: Thickness directly impacts dielectric strength and space utilization. Choose a caliper that fits your design without compromising performance.
Flexibility and Tensile Strength: For tight windings, a flexible paper like crepe is ideal. For structural components like slot liners, a rigid paper like fish paper is better.
Environmental Conditions: Consider exposure to moisture, oil, or chemicals. Nomex is excellent for harsh environments, while presspaper is ideal for oil-filled systems.
