A must-read for Northerners building heated kang beds! The high-temperature combination of pre-oxygenated silk and fire kang.
Jun 25,2025
Northern Kkang Upgrade Plan Pre-oxidized Fiber + Fireproof Cement Crack-Resistant and High-Temperature Resistant Construction Guide
Problems with traditional Northern Kkang:
1. Cracking and crumbling: Ordinary cement expands and contracts with heat, easily cracking after 2 years, and flue leakage affects heating efficiency.
2. Local high-temperature carbonization: The parts where firewood is concentrated are prone to pulverization and require annual repairs.
3. Poor heat storage: The temperature drops sharply after the fire is stopped at night, making the elderly and children susceptible to catching a cold.
Material Technology: Why is pre-oxidized fiber a lifesaver for Kkang?
The bending strength of ordinary cement combined with wheat straw is low. After experiencing a temperature difference shock from 200℃ heating to ﹣20℃, it becomes ineffective after about 15 uses.
The bending strength of pre-oxidized fiber combined with fireproof cement is higher, and the number of thermal shock cycles is more than 4 times that of ordinary cement combined with wheat straw. (The number of thermal shock cycles refers to the number of temperature difference shocks from 200℃ to ﹣20℃).
Why add pre-oxidized fiber to Northern Kkang?
1. Crack-resistant operation:
Pre-oxidized fiber is like "invisible steel bars", weaving a net in the fireproof cement, and is not afraid of cracking due to thermal expansion and contraction!
Measured data: The flexural strength is 2.7 times higher than that of wheat straw cement!
2. 300℃ heat resistance:
The high-temperature area of the stove mouth is carbonized into a "ceramic armor", and even if the firewood burns fiercely, it will not pulverize!
3. Fuel-saving and worry-free:
Makes the entire Kkang conduct heat evenly, saving 30% fuel, and maintaining heat for 8 hours after the fire is extinguished, keeping it warm even in the second half of the night!
Let the Kkang in your home become a family heirloom! Let the Kkang in your home warm the cold winter nights!
Why choose pre-oxidized fiber material?
Why choose pre-oxidized fiber material instead of other high-temperature resistant fiber materials?
Pre-oxidized fiber is high-temperature resistant and can stably operate at 200℃ for a long time, with an instantaneous temperature resistance of 1000℃. It can withstand high temperatures of firewood, and the stove mouth will not pulverize or collapse! The performance is good enough for household Kkang use.
The crack resistance of pre-oxidized fiber is stronger than that of ordinary materials, and it can withstand the pressure brought by thermal expansion and contraction.
Environmentally friendly and non-toxic, pre-oxidized fiber does not produce toxic gases or smoke when burned in an open flame.
Reasons for choosing pre-oxidized fiber insulation pads for Kkang
1. High cost performance
The production process of pre-oxidized fiber non-woven fabric is mature, and the cost is lower than other high-temperature special materials.
2. Excellent performance
Pre-oxidized fiber insulation pads are flame-retardant, fire-resistant, and high-temperature resistant, with a long-term temperature resistance of 200℃ and an instantaneous temperature resistance of 1000℃. Pre-oxidized fiber fireproof cotton is soft, light, and not prickly, light in weight, easy to cut, and easy to fold.
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