In the design and manufacturing of power equipment and electric machines, the selection of insulation materials is crucial. It directly affects equipment performance, service life, and operational safety. When engineers choose materials for high-end applications, aramid paper and ordinary insulation paper (typically cellulose insulation paper) are often compared.
Aramid paper has increasingly become the preferred material for transformers, motors, and new-energy vehicle applications. This article compares the two materials and explains the core advantages of aramid paper.
It is made primarily from wood-based cellulose and processed through chemical treatment and pulping. It has good insulation properties and moderate mechanical strength. With low cost, it is widely used in traditional electrical equipment.
It is produced mainly from meta-aramid polymer (poly(m-phenylene isophthalamide)), aramid paper is a high-performance engineered insulation material. It offers outstanding dielectric strength, high-temperature resistance, corrosion resistance, and mechanical durability, making it a common choice in advanced electrical applications.
Capable of long-term operation in high-temperature environments and under thermal shock.
Maintains stability under acidic or alkaline conditions without degradation or corrosion.
High tensile strength and excellent flexibility, ensuring reliable structural integrity.
Prevents electrical leakage, short circuits, and arc damage between components.
The properties of aramid paper directly address the critical needs of advanced electrical systems:
Modern devices such as traction transformers, wind power converters, and data center power modules need to deliver higher power within smaller volumes, which leads to increased internal temperatures.
Ordinary insulation paper cannot handle such thermal stress.
Aramid paper’s superior heat resistance enables compact designs while maintaining safety.
Equipment like high-speed rail traction motors and electric vehicle drive motors undergo frequent acceleration, braking, and heavy current surges, generating intense mechanical and thermal stress.
Aramid paper’s strength and toughness ensure that the insulation system remains intact under extreme working conditions, meeting automotive-grade and industrial reliability standards.
Fire safety is a critical requirement for mining equipment, marine power systems, and dry-type transformers in high-rise buildings.
Aramid paper is naturally flame-retardant and will not burn under arc or overheating conditions, preventing fire spread and ensuring intrinsic system safety.
Although aramid paper costs more than ordinary insulation paper, it offers a much longer service life and lower failure rates.
This reduces downtime and maintenance expenses, making it more cost-effective over the entire lifecycle of the equipment.
New Energy Vehicles: Insulation for drive motors and on-board chargers.
Dry-Type Transformers: Used in SCB10/SCB11 winding insulation.
Power Transformers: Applied as insulation paper and laminated sheets in high-temperature zones.
Aerospace and Military Equipment: Motors and transformers used in aircraft and naval vessels.
High-Frequency Motors & Generators: Such as wind turbine generators.
Choosing between aramid paper and ordinary insulation paper is a strategic decision tied to performance, safety, and reliability.
For standard, low-voltage equipment operating at modest temperatures, ordinary insulation paper remains an economical and reasonable choice.
For high-voltage, high-temperature, high-reliability applications or extreme operating environments, aramid paper is the superior solution.
Aramid paper breaks the performance limitations of traditional insulation materials and ensures long-term operational safety, making it a valuable investment.
Selecting aramid paper for high-end electrical equipment establishes a strong foundation for performance and reliability.
If you need our products please write down any questions, we will reply as soon as possible.
There are three ISO certificates for quality certification. The certificates will be shown later. ISO
After receiving the advance payment, the production cycle is 15-25 days. And the transportation cycle should be calcul……
We supply with installation guide and user manual for each transformer. If you do not understand them. We will offer v……
