抄録
An equation of motion to describe the water penetration through a textile is derived on the basis of Darcy's law of fluid flow through general porous media. Experiments revealed that the process of fluid penetration seems to be composed of a few partial modes each of which this equation could describe, though not the whole process. As the authors reported earlier, a similar multimodality of process is found in the retardation-time spectrum; the spectrum is abstracted from the weight-time curve of absorbed water being led by the idea that the process may be assumed as a kind of retardation phenomenon such as the creep of a viscoelastic material put under a load. Identifying these two multimodalities with the aid of the equation of penetration gives a clue to clarify what kinds of flow paths play typical roles when a textile absorbs water.
