초록 ▼

A contiguous planar composite sheet-like structure includes a pair of outwardly facing laminar thermoplastic sheets having generally planar outwardly and oppositely facing surfaces and a honeycomb inner core having axially elongated honeycomb cells with cell axes substantially perpendicular to the o

A contiguous planar composite sheet-like structure includes a pair of outwardly facing laminar thermoplastic sheets having generally planar outwardly and oppositely facing surfaces and a honeycomb inner core having axially elongated honeycomb cells with cell axes substantially perpendicular to the outwardly facing thermoplastic sheets, with the honeycomb inner core protruding into the laminar thermoplastic sheets sufficiently far that the honeycomb cells are securely retained by the thermoplastic sheets. A method for manufacturing the composite sheet-like structure encompasses heating either or both the thermoplastic and the honeycomb inner core and thereafter pressing these members together to effectuate the desired composite structure.

대표청구항 ▼

A method for fabricating a rigid composite structure having outwardly facing thermoplastic sheets and a porous inner core having at least some open inner core pores with said inner core protruding into said thermoplastic sufficiently far that exteriorly facing pores in the inner core are retained by

A method for fabricating a rigid composite structure having outwardly facing thermoplastic sheets and a porous inner core having at least some open inner core pores with said inner core protruding into said thermoplastic sufficiently far that exteriorly facing pores in the inner core are retained by said plastic and said structure has essentially the resistance to flexure of said inner core standing alone, comprising: a. positioning said thermoplastic sheets on either side of said inner core; b. heating said inner core by application of electrical voltage thereto until surfaces thereof facing said thermoplastic sheets and contiguous inner portions of said inner core, of thickness equal to depth to which said inner core penetrates said thermoplastic, to at least the glass transition temperature of said thermoplastic to permit said inner core to penetrate said thermoplastic sufficiently so that said inner core is retained by said thermoplastic when said thermoplastic has solidified; and c. pressing said thermoplastic on either side of said inner core until said inner core penetrates said thermoplastic by said distance sufficient to permit said thermoplastic to retain said inner core when said thermoplastic solidifies.