This is a magical paper cloth. Place it together with A4 paper and light it with lighter. The A4 paper has already burned, but the paper cloth never ignites.
Furthermore, when we dropped 95% sulfuric acid on it, let it stand for 10 minutes, and then picked it up with tweezers, there was no change, but the cotton cloth next to it had been corroded through.
Next, boil the two fibers with caustic soda solution. After 30 minutes, their strength is tested. The paper cloth is obviously stronger than the cotton cloth.
This is one of the world’s three major high-tech fibers — aramid fiber.
What is aramid fiber? According to the characteristics, aramid fiber can be divided into “bulletproof fiber’ and “fireproof fiber”.
The former also has another name “Kevlar” or “VICWA”, The strength is 5 to 6 times that of high-quality steel, the toughness is twice that of stee, and weight is only 1/5 of steel. It is often used in body armer and bulletproof helmets.
This name is “Nomex” or “Aramicore”. It’s thermal stability, flame retardancy and electrical insulation are relatively strong, and the “aramid paper honeycomb” made with it has a wide range of uses. For example, the “sandwich structure” of an aircraft is like a sandwich. There is a layer of honeycomb composites material sandwiched between the two skins. It not only reduces the overall weight, but also increaces the structural strength. It is used in the doors and bulkheads of the aircraft, floor, ceiling, luggage rack, flaps, tail and other position are covered.
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