초록 ▼

A planar composite panel is constructed from two resin-impregnated fiber face sheet covering and bonded to the two sides of a honeycomb core element and a surrounding border element made of rigid foam board. The two planar faces of the rigid foam board are embossed with a pattern of indentations in

A planar composite panel is constructed from two resin-impregnated fiber face sheet covering and bonded to the two sides of a honeycomb core element and a surrounding border element made of rigid foam board. The two planar faces of the rigid foam board are embossed with a pattern of indentations in the form of interlinked equilateral triangles which are sufficiently deep and close together to provide escape paths for volatiles generated inside the panel during curing of the resin in the face sheets by which the face sheets are bonded to the honeycomb core element and the foam board, to prevent the development of excessive pressure between the face sheets that otherwise would interfere with the bonding.

대표청구항 ▼

A planar composite panel having two opposed planar faces, comprising: two resin-impregnated fiber face sheets covering and bonded to two opposed sides of a core element; and a border element made of foam board surrounding said core element, said border element including a plurality of foam strips ea

A planar composite panel having two opposed planar faces, comprising: two resin-impregnated fiber face sheets covering and bonded to two opposed sides of a core element; and a border element made of foam board surrounding said core element, said border element including a plurality of foam strips each of said foam strips having a pattern of indentations within at least one side of said foam board, said pattern of indentations having three series of indentations within said foam board, each series being angularly offset from each other two series by 60°; said resin being of the type that generates relatively large volumes of volatile vapors during curing in the course of said bonding, said volatile vapors having been vented from said core element between said face sheets though said series of indentations within said foam board.