| 摘要 |
PROBLEM TO BE SOLVED: To provide a scrim cloth-laminated unidirectional prepreg capable of molding FRPs of excellent grade and properties through preventing a scrim cloth from debonding with its high adhesive strength, and to provide a method for producing the prepreg. SOLUTION: The scrim cloth-laminated unidirectional prepreg is such that the peel strength of the scrim cloth at 24°C and 50% RH is≥1,000 g/25mm and the loss percentage of the peel strength after left to stand for 7 days in the above atmosphere is≤10%. The method for producing the prepreg comprises the following process: A sheet of unidirectionally arranged reinforcing fibers fed continuously is superimposed with the scrim cloth into a laminate, both sides of which are each superimposed with a release paper coated with a matrix resin on one side so that the coated surface turn on the laminate followed by heating under pressure to transfer and impregnate the matrix resin on both of the release papers onto and into the laminate, wherein the viscosity of the matrix resin on the release paper on the unidirectionally arranged sheet side is kept at 100-200 Pa s, while that on the scrim cloth side at 23-55 Pa s. COPYRIGHT: (C)2005,JPO&NCIPI |
