Thermally Upgraded Insulation Kraft Paper

The thermally upgraded insulation paper is made from 100% electric grade unbleached pulp, and upgrading is achieved by adding nitrogen (nitrogen filling content 1.1~2.3%) to the paperpulp. Upgrading is achieved by adding nitrogen to the paper pulp. Nitrogen replaces the oxygen which otherwise oxidizes and ages the paper at high temperature.
TUP is mainly used for winding insulation, conductor wrapping, layer insulation, and insulation components in oil-immersed transformers. Chengrui Insulation can offer both green and natural color thermally upgraded paper.

Main Features:

★E-Class 120°C certified heat resistance for reliable thermal endurance

★100% electric-grade unbleached pulp ensures optimal dielectric purity

★Cylinder-milled manufacturing delivers superior tensile strength (machine direction) and tear resistance (cross direction)

★Excellent magnet wire wrapping capability with smooth, consistent performance

★Fine-textured surface from pure materials provides exceptional dielectric strength

Application of Thermally Upgraded Insulation Paper

Coil winding, barrier, core & layer insulation in transformers. It is also used in motors and other electrical applications where high dielectric and physical strength are required.

Chengrui Insulation supplies thermally upgraded kraft paper for transformer insulation systems that require better thermal aging performance than standard kraft paper. Our customers include transformer OEMs, winding material distributors, and insulation paper converters. We can supply the material in rolls with different thicknesses and customized widths, and provide slitting, sample testing, packing confirmation, and export service for bulk orders. 

Thermally upgraded paper series:

Thermally upgraded kraft paper
Thermally upgraded diamond dotted paper (TU DDP)
Dennison equivalent paper