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You are here: Home » Products » Carbon Fiber Fabrics & Prepregs » Bismaleimide (BMI) Resin-Based Carbon Fiber Prepreg

Bismaleimide (BMI) Resin-Based Carbon Fiber Prepreg

 
By using modified BMI resin as the matrix and combining it with high-modulus carbon fibers, a high-performance composite material that is resistant to high temperatures and damp heat is formed. It can maintain structural stability in extreme environments of high temperatures and high humidity, and also has excellent creep resistance and anti-aging capabilities. It is mainly used for core load-bearing/heat-resistant components of high-end equipment.
 
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Core Advantage

  • Excellent high-temperature resistance: The long-term service temperature is 50-80℃ higher than that of epoxy resin-based products, and it can adapt to high-temperature working conditions around aero engines, aerospace vehicles, etc.

  • Strong resistance to moisture and heat: In an environment with a humidity of 90% and a temperature of 80℃, the retention rate of mechanical properties is ≥90% (70% for epoxy resin base).

  • High dimensional stability: Low coefficient of thermal expansion (≤2×10^-6/℃), and minimal deformation of components in high-temperature environments;

  • High added value attribute: High technical barriers, suitable for high-end customized demands, and the profit margin is significantly higher than that of conventional categories.


Product Application

  • Aviation field: Aircraft engine casings, tail nozzle linings, heat-resistant components at the leading edge of wings;

  • Aerospace field: satellite structural components, carrier rocket connectors, insulation layers for re-entry vehicles;

  • High-end industry: Pantographs for high-speed rail transit, high-temperature fixtures for industrial furnaces, high-temperature components for oil drilling;

  • In the electronics field: high-frequency circuit board substrates, heat dissipation brackets for high-power electronic components.


Technical Parameters

Indicator CategoryCore Parameter Range
Matrix ResinModified BMI (Bismaleimide) based on epoxy resin
Carbon Fiber Specification12K/24K medium to high modulus carbon fiber (mainly unidirectional)
Areal Density200–350 g/m²
Resin Content30%–32%
Curing ProcessHigh-temperature curing (150–200°C), curing time: 90–150 min
Mechanical PropertiesTensile strength ≥320 MPa, flexural modulus ≥200 GPa, heat resistance ≥1000h (150°C)
Heat ResistanceLong-term use temperature: 150–200°C, short-term heat resistance: 250°C
Storage ConditionsStore at -18°C, shelf life: 3–6 months


FAQ

1. Does the processing of this product require special equipment?

It is necessary to be equipped with a high-temperature autoclave (with a maximum temperature of ≥200℃) or a high-temperature molding machine. It is recommended that the equipment has precise temperature control (±2℃) and pressure holding functions. Equipment selection suggestions can be provided.


2. How much higher is the cost compared with epoxy resin base?

Under the same specifications, the price of BMI resin-based prepregs is 2 to 3 times that of epoxy resin-based ones, mainly due to the cost of resin raw materials and the premium of high-temperature processing technology. It is suitable for high value-added fields.

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