Patent ID: 7332050

Claim:
A method for preparing a non-woven fabric coated with nano fibers comprising the steps of: spinning the nano fibers on one surface or both surfaces of a transferred fiber material by one or more electrospinning apparatus, including a spinning dope drop device, and bonding the nano fibers, wherein the spinning dope drop device is disposed between a metering pump and a nozzle block and includes: a sealed cylindrical shape, a spinning dope inducing tube and a gas inlet tube for receiving gas through its lower end and having its gas inlet part connected to a filter which is aligned, side-by-side, at the upper portion of the spinning dope drop device, a spinning dope discharge tube protruding from the lower portion of the spinning dope drop device and a hollow unit for dropping the spinning dope from the spinning dope inducing tube formed at the middle portion of the spinning dope drop device.