Insulating crepe paper and crepe paper tubes are key insulation materials in the manufacturing industries of power transformers, reactors, instrument transformers, and other electrical equipment. Many purchasing personnel have found that, due to the specialized nature of the application scenarios and high technical requirements, there are significant differences in the prices quoted by different manufacturers for the same specifications of crepe paper or crepe tubes. This article will analyze this from the aspects of price, influencing factors, market conditions, and purchasing suggestions.
It is a high-elongation insulating paper made from high-quality sulfate insulating wood pulp through a crepe-forming process. Its main applications include lead wire wrapping, interlayer insulation, padding blocks, and insulating liners.
It is a hollow tubular product formed by winding crepe paper or NOMEX® high-temperature paper. This product has high strength and structural stability. Its main uses include lead wire wrapping, tap changer insulation, support bars, and wire rod insulation.
Although they both belong to electrical insulation materials, their processing methods and specific uses are different, resulting in significant price differences.
| Item | Reference Price (USD/KG) | Description |
| Standard Crepe Paper (Pure Wood Pulp) | $3.5 – $6 / kg | Used for lead wrapping in oil-immersed transformers |
| High-Extension Crepe Paper | $5 – $8 / kg | Elongation rate 100%–300% |
| NOMEX® Crepe Paper | $35 – $60 / kg | Long-term heat resistance up to 220°C. Used for special electrical equipment |
| Item | Reference Price (USD/meter) | Description |
| Standard Crepe Paper Tube | $0.3 – $1.5 / m | Diameter 3–50 mm
Widely used in oil-immersed transformers |
| Thickened Crepe Paper Tube | $1 – $3 / m | Higher strength
Suitable for large-current leads |
| NOMEX® Crepe Paper Tube | $5 – $15 / m | High-temperature resistant Used in dry-type transformers or special reactors |
Note: The above prices are industry reference ranges. Country, specifications, order quantity, oil–paper content, thermal class, and brand differences will all affect the actual price.
NOMEX® high-temperature paper is more expensive than pure wood pulp insulation paper.
Within the same brand, the higher the temperature resistance rating (e.g., 105℃→120℃→180℃→220℃), the higher the price.
Higher purity and lower impurity content of raw materials result in higher costs.
Product elongation is affected by crepe depth. The complexity of the processing technology increases with increasing elongation, leading to a corresponding price increase.
For example, ordinary crepe paper has an elongation of 30%–80%, while high-elongation crepe paper has an elongation of 100%–300%, and its price is 20%–50% higher than ordinary crepe paper.
The manufacturing difficulty of crepe paper tubes increases with decreasing diameter, increasing wall thickness, and higher roundness requirements, leading to a price increase.
Products used in oil-immersion applications must meet requirements for oil absorption rate and mechanical strength.
Products used in dry environments must meet requirements for temperature resistance, air gap stability, and moisture resistance. Higher electrical performance levels result in higher production costs.
Domestic brands are generally cheaper than international brands (such as DuPont NOMEX®).
High-quality domestic brands have stronger price competitiveness.
Exporting products incurs additional costs for packaging, testing, and certification, typically increasing costs by 5%–10%.
The development of new energy (wind power, photovoltaic), charging pile industries, and the upgrading and expansion of the power grid are driving continued growth in the demand for insulating paper.
Rising raw material costs and tight supply and demand have led to a significant price increase for NOMEX® paper and its derivatives, with increases reaching 8%–15%.
The reduced volatility in wood pulp prices has kept the market price of conventional crepe paper stable.
Oil-Immersed Transformers: Ordinary crepe paper tubes and high-elongation crepe paper are recommended.
Dry-Type Transformers: NOMEX® crepe paper or crepe paper tubes are recommended.
Reactors and Instrument Transformers: Thickened crepe paper tubes are recommended due to their higher mechanical strength.
Insulation gaps and electric field distribution can be affected by dimensional deviations. The following parameters need to be confirmed during procurement: diameter, wall thickness, roundness, and elongation grade.
Bulk purchase discounts are typically available for orders of 500kg or more. Compared to small-batch purchases, this can save 10%–25% in costs.
When purchasing, the following testing data should be verified: dielectric strength, oil absorption rate, elongation, temperature resistance rating, and aging test data.
The market price of insulating crepe paper and crepe paper tubes is influenced by multiple factors, including raw materials, processing technology, temperature resistance rating, and customization requirements. For electrical companies and transformer manufacturers, selecting cost-effective and reliable suppliers is crucial for controlling procurement costs and ensuring product quality.
If you have a need for high-quality crepe paper and crepe paper tubes, please contact us for the latest technical information and quotations.
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