F Class CHR5440-1 Resin-Rich Mica Tape For Motors

F Class CHR5440-1 Resin-Rich Mica Tape

The Chengrui CHR5440-1 resin-rich mica tape is a flexible, double-sided glass-cloth reinforced mica insulation material designed for press-cured main-wall insulation in high-voltage motors and generators.

It is supplied for customers evaluating a practical alternative to CALMICAGLAS® 4202 in resin-rich insulation systems where Class F performance is acceptable. Its construction combines mica paper, electrical-grade alkali-free glass cloth on both sides and a heat-resistant thermosetting epoxy resin in B-stage condition.

Because motor and generator insulation systems differ, replacement approval should be based on a technical comparison of the material construction, thermal class, thickness, resin content, curing cycle and finished-coil performance.

Material Structure

CHR5440-1 resin-rich mica tape consists of three main components:

The resin is incorporated throughout the mica-paper and glass-cloth structure. It is not a conventional pressure-sensitive adhesive applied only to the tape surface.

After wrapping and hot-press curing, the tape forms a compact insulation structure with combined electrical, mechanical and thermal performance.

Key Features

Resin-Rich Insulation System

5440-1 contains the resin required for consolidation and curing. It is intended for resin-rich processing rather than conventional resin-poor VPI insulation.

Double Glass-Cloth Reinforcement

Glass cloth on both sides improves tape strength and dimensional stability during wrapping, pressing and curing. It also helps reduce wrinkling, tearing and movement between insulation layers.

Suitable for Hand and Machine Taping

The flexible tape construction allows it to be wrapped manually or applied using an automatic taping machine, subject to the correct tape width, roll dimensions and machine tension settings.

Press-Cured Main-Wall Insulation

After wrapping, the insulated coil or bar is heated, pressed and fully cured. The curing parameters must be selected according to the resin system, insulation thickness and coil construction.

Designed for High-Voltage Rotating Machines

The material is intended for the main insulation of motor and generator coils and bars where mica-based dielectric protection and mechanical reinforcement are required.

Typical Applications

5440-1 resin-rich mica tape may be used for:

• High-voltage motor stator coils

• Generator stator coils and bars

• Main-wall or groundwall insulation

• Large and medium-sized motor windings

• Traction motor insulation

• Press-cured coil insulation systems

• Repair and replacement of existing resin-rich mica insulation

Final suitability must be confirmed according to the voltage level, thermal class, coil structure and curing process of the complete insulation system.

Comparison with CALMICAGLAS® 4202

This comparison is based on the general construction and processing route. It does not mean that the two materials are identical in every property.

Why Consider Chengrui CHR5440-1?

For manufacturers currently using CALMICAGLAS® 4202 or another imported resin-rich mica tape, Chengrui 5440-1 provides an alternative sourcing option.

Ordering Information

Please provide the following information when requesting a quotation or sample:

1. Required thickness and tolerance

2. Tape width and roll length

3. Core inner diameter and maximum roll diameter

4. Required thermal class

5. Manual or automatic taping method

6. Existing material grade, if available

7. Application and operating voltage

8. Estimated order quantity

Samples can be prepared for wrapping, curing and finished-insulation evaluation before volume production.

Frequently Asked Questions

Q1: Is Chengrui CHR5440-1 the original CALMICAGLAS® 4202?

A: No. Chengrui CHR5440-1 is an independently manufactured resin-rich mica tape offered for customers evaluating an alternative to CALMICAGLAS® 4202. It is not manufactured or licensed by ISOVOLTA.

Q2: Can it directly replace CALMICAGLAS® 4202?

A: It may replace CALMICAGLAS® 4202 in qualified applications, but it should not be treated as an automatic drop-in replacement. The construction, thermal class, resin content, thickness, curing cycle and finished-coil performance must be compared.

Q3: Is 5440-1 suitable for VPI processing?

A: 5440-1 is primarily a resin-rich mica tape. It already contains a substantial amount of thermosetting resin and is normally consolidated by heating and pressing. It is different from resin-poor mica tape designed specifically for VPI impregnation.

Q4: Can it be used on an automatic taping machine?

A: Yes, provided that the tape width, core size, roll diameter, flexibility and tensile strength match the machine requirements. A machine-taping trial is recommended before mass production.

About Chengrui Insulation

Xuchang Chengrui Insulation Material Co., Ltd. supplies electrical insulation materials for motors, generators, transformers and electrical equipment.

Our product range includes mica tapes, flexible composite insulation materials, electrical films, insulation papers, laminated sheets and customized insulation components.

To evaluate 5440-1 resin-rich mica tape for your insulation system, please send us your current material specification, required dimensions and application details.

Trademark Notice

CALMICAGLAS® is a trademark of its respective owner. Chengrui 5440-1 is an independent product and is not manufactured, licensed, sponsored or endorsed by ISOVOLTA. The reference is used only to describe the intended comparison and replacement application.