PMP Composite Insulation Paper | 3-Layer Flexible Electrical Insulation Sheet for Motors & Transformers

PMP Composite Insulation Paper is a high-grade, three-layer flexible composite material widely utilized in the electrical insulation industry. It is manufactured by bonding a central layer of high-performance polyester film (PET) with two outer layers of premium electrical grade insulation fiber paper using a specialized, high-stability adhesive.

This advanced combination perfectly synergizes the exceptional dielectric strength of the polyester film with the excellent mechanical robustness, tear resistance, and impregnation qualities of the insulation paper. It ensures optimal phase-to-phase, slot, and inter-turn insulation reliability under rigorous operating conditions.

Key Features & Advantages 

• Outstanding Dielectric Properties: High breakdown voltage ratings effectively prevent electrical leakage, ensuring maximum safety and operational efficiency in high-voltage environments.

• Superior Mechanical & Forming Performance: High tensile strength and exceptional flexibility prevent tearing during high-speed automated winding and forming processes.

• Excellent Thermal Stability: Engineered to withstand heat up to 130°C without delamination, blistering, or adhesive flow, ensuring a long and safe service life.

• Superb Resin Impregnation: The outer electrical fiber paper maintains excellent porous characteristics, allowing comprehensive absorption of insulating varnishes and impregnation resins.

Typical Applications 

PMP composite insulation paper is widely recommended for electrical manufacturing, coil winding, and motor maintenance sectors:

• Electric Motors & Generators: Ideal for slot insulation, phase insulation, and turn-to-turn liner insulation in small to medium-sized machinery.

• Transformers & Mutual Inductors: Perfect for core insulation, interlayer insulation, and end-wrapper shielding.

• Electromagnetic Coils: Used as robust wrapping insulation for various inductive components and industrial coils.