It is an object of the present invention to provide a stable production process for a melt-blown nonwoven fabric comprising thin fibers and having extremely few thick fibers [number of fusion-bonded fibers] formed by fusion bonding of thermoplastic resin f...

Provided are a multilayer filter medium for use in a filter, whichmakes it possible to obtain a filter having high collection efficiency, low pressure loss and a long filter lifetime, and a filter using the multilayer filter medium for use in a filter. A m...

The air intake channel, for an internal combustion motor, has a bed of solid particles secured directly within the air channel, as an air filter. The filter has a thermoplastic base, with filaments or industrial waste as the solid particles.