초록 ▼

An improved rigidized resinous foam core sandwich structure is formed by the following method: Threading a length of high tensile strength fiber through the fiber glass sheets placed contiguous the opposite longitudinal faces of a flexible open-celled foam sheet and through the foam sheet in a manne

An improved rigidized resinous foam core sandwich structure is formed by the following method: Threading a length of high tensile strength fiber through the fiber glass sheets placed contiguous the opposite longitudinal faces of a flexible open-celled foam sheet and through the foam sheet in a manner to provide a continuous series of fiber segments which interconnect the fiber glass sheets; Impregnating the flexible open-celled foam sheet and the fiber glass sheets with a settable resin containing a curing agent; and Molding the foam core sandwich into the desired shape and holding it in place while the resin cures.

대표청구항 ▼

A reinforced rigidized resinous foam core sandwich structure comprising an open-celled flxible foam sheet, a thin plyable sheet contiguous each of the opposite longitudinal faces of said flexible foam sheet, a plurality of high tensile strength fiber segments passing through said flexible foam sheet

A reinforced rigidized resinous foam core sandwich structure comprising an open-celled flxible foam sheet, a thin plyable sheet contiguous each of the opposite longitudinal faces of said flexible foam sheet, a plurality of high tensile strength fiber segments passing through said flexible foam sheet with the end portions of said fiber segments extending beyond said opposite longitudinal faces, the cells of said flexible foam sheet being impregnated with a settable resin and curing agent therefor, and said end portions of said fiber segments being bonded to said thin plyable sheets.