Method for impregnation of resin.

摘要

The present invention provides a method for impregnation of resin in a sheet-like material comprising, for example, tows arranged in parallel at high impregnation rate and without squeezing-out of the resin. This method comprises superposing a sheet-like material on a resin layer and then impregnating the resin in the sheet-like material by using a press roll which has a specific rugged pattern. This rugged pattern includes convex portions enclosed by straight line, curved line or both of them.