Deep-drawn marine hull having a sandwich structure with a cellulose-based core and watercraft utilizing same
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United States of America Patent
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Feb 14, 2017
Grant Date -
May 21, 2015
app pub date -
Jan 23, 2015
filing date -
May 24, 2012
priority date (Note) -
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Abstract
A deep-drawn, marine hull having a sandwich structure with a cellulose-based core and watercraft utilizing same are provided. The hull includes an outer skin of a fiber-based thermoplastic and having a waterproof outer surface, a first sheet of thermoplastic adhesive, an inner skin of a fiber-reinforced thermoplastic material and having a compartment-defining outer surface, a second sheet of thermoplastic adhesive and a shock absorbing, cellular core of a cellulose-based material and positioned between the skins The skins are bonded to the core by the first and second sheets and by press molding. Cells of the cellular core absorb energy of an impact at the outer surface of the outer skin by deformably crushing. Air trapped within cells which are not completely crushed or punctured by the impact provide the hull with buoyancy to allow the hull to float at the surface of a body of water.
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