一、Mainstream models (classified by temperature resistance, GB/T3003)
| model |
Classification Temperature |
Long term use temperature |
Al₂O₃content |
Applicable working conditions |
| Common STD |
1260℃ |
≤1050℃ |
44%~47% |
Universal furnace body, pipeline sealing, household appliance insulation |
| high purity HA |
1260℃ |
≤1100℃ |
48%~52% |
Low impurity, glass demolding, precision electric furnace |
| high alumina HA |
1400℃ |
≤1200℃ |
58%~62% |
Heat treatment furnace, aluminum ladle, high-temperature flange |
| Containing zirconium HZ |
1430℃ |
≤1350℃ |
加 ZrO₂ |
1300 ℃ continuous high temperature, metallurgical high temperature zone |
二、Core physical performance
- Excellent insulation: low thermal capacity, low thermal conductivity, thermal conductivity ≤ 0.08~0.12 W/(m · K) at 500 ℃, strong insulation and energy-saving effect
- Flexible and easy to process: can be cut, stamped, wrapped, die cut, folded and not easily layered, suitable for irregular gaps
- Insulation and fire resistance: non combustible, high-temperature insulation, thermal shock resistance, no cracking during rapid cooling and heating
- Chemical stability: resistant to most acids, bases, oils, and water vapor; Not resistant to hydrofluoric acid and strong alkali only
- Specifications
- Thickness: 0.4~12mm (commonly used 1/2/3/5/8/10mm)
- Width: 610mm/1220mm, length 6-120m customizable
- Bulk density: 180~240 kg/m ³
- High temperature 24-hour linear shrinkage: ≤ 3% (high-quality products ≤ 2%)
- Low slag ball content, smooth surface without powder falling off
三、Four core application scenarios
1. Industrial high-temperature insulation and heat preservation
Backlining insulation for industrial kilns, heat treatment furnaces, and annealing furnaces; Steel ladle, cast aluminum mold lining; High temperature flue, boiler, exhaust pipe wrapped for insulation; New energy storage cabinets and insulation layers for battery modules.
2. High temperature sealing gasket (most commonly used)
Furnace door, furnace body expansion joint, flange, electric heating equipment sealing gasket; Sealing of gas ovens and industrial ovens; High temperature resistant gaskets for pipeline flanges, replacing asbestos gaskets.
3. Electrical insulation
Insulation isolation of resistance wire and heating tube; High temperature insulation for electric furnaces, high-temperature instruments, and semiconductor equipment; Fire and heat insulation of power batteries.
4. special industry
- Glass/microcrystalline glass high-temperature demolding isolation paper
- Car exhaust pipe, muffler insulation and noise reduction
- Fireproof partitions, fireproof door filling, laboratory high temperature protection
- Precision casting, metallurgical flow channel liner
四、Difference between two common categories
- Organic bonding fiber paper (universal)
Strong toughness and high tensile strength at room temperature, organic glue evaporates a small amount of white smoke at 400 ℃, with no residual harmful substances; Industrial sealing and insulation are universal, with the highest cost-effectiveness.
- Pure inorganic fiber paper (clean version)
No organic binder, high temperature throughout the process without any odor or volatilization; Food baking equipment, laboratories, and clean high-temperature equipment are specialized and priced higher.
五、Precautions for use
- It is recommended to wear dust masks and gloves during cutting and construction to avoid inhaling ultrafine fibers; Ventilation operation.
- There will be slight smoke when the temperature is initially raised to 400-600 ℃, which is due to the normal volatilization of the adhesive. There is no release after the temperature is raised.
- Long term use temperature should not exceed the rated working temperature of the model, otherwise shrinkage will increase and pulverization damage will occur.
- Do not use in environments with concentrated alkali or hydrofluoric acid, as it can corrode fibers and cause failure.
