초록 ▼

A composite structure comprising a rigid closed-cell foam core element to which is bonded an initially resilient open-cell foam material and a layer of high strength reinforcing material which are compressed against the core element so as to cause a thermosetting resinous material to form a resin ma

A composite structure comprising a rigid closed-cell foam core element to which is bonded an initially resilient open-cell foam material and a layer of high strength reinforcing material which are compressed against the core element so as to cause a thermosetting resinous material to form a resin matrix extending throughout the open-cell material and reinforcing layer to bond the composite layers together.

대표청구항 ▼

A composite structure comprising a rigid closed-cell core element, an initially resilient open-cell foam material overlaying at least one face of said core element, a layer of high-strength reinforcing material overlaying said open-cell foam material, a polymerizable resinous material impregnating t

A composite structure comprising a rigid closed-cell core element, an initially resilient open-cell foam material overlaying at least one face of said core element, a layer of high-strength reinforcing material overlaying said open-cell foam material, a polymerizable resinous material impregnating the open-cell material, said resinous material having been cured while maintaining the structure under sufficient compression to substantially reduce the thickness of the initially resilient foam to thereby substantially fill the open cells and extrude excess resinous material from the compressed layer to bond the high-strength reinforcing material to the rigid closed-cell core element without significant permeation of the closed-cell core element.