Composite flooring for recreational vehicles
A laminated panel is provided comprising a skeletal framework, foam core inserts, an impact resistant sheet, and a weather resistant sheet bonded together with adhesive. Recreational vehicles incorporating such panels are also contemplated, as are methods of making the composite laminated panel.
1 . A recreational vehicle comprising a composite laminated panel, wherein:
the composite laminated panel comprises a skeletal framework, a plurality of foam core inserts, an impact resistant sheet on a first side of the composite laminated panel, a weather resistant sheet on a second side of the composite laminated panel, and a plurality of contained framework cells;
the skeletal framework of the composite laminated panel comprises a plurality of closed frame sections defined by frame segments of the skeletal framework;
each contained framework cell is bounded volumetrically by frame segments of a closed frame section, portions of the impact resistant sheet, and portions of the weather resistant sheet;
individual ones of the foam core inserts are large enough to frictionally engage at least two parallel frame segments of a closed frame section of the skeletal framework;
each contained framework cell is packed with one or more of the foam core inserts and the foam core inserts within each cell collectively occupy a substantial entirety of the contained framework cell; and
the skeletal framework, the foam core inserts, the impact resistant sheet, and the weather-resistant sheet comprise a structurally integrated composite laminated panel, such that a collective modulus of elasticity (MOE) of the composite laminated panel comprises modulus components that are attributable to the skeletal framework, the foam core inserts, the impact resistant sheet, and the weather resistant sheet.
2 . The recreational vehicle of claim 1 , wherein the collective MOE of the composite laminated panel is between about 6000 ksi (4×10 4 MPa) and about 10000 ksi (7×10 4 MPa).
3 . The recreational vehicle of claim 1 , wherein the collective MOE of the composite laminated panel is 8000 ksi (5.5×10 4 MPa)±10%.
4 . The recreational vehicle of claim 1 , wherein a majority of the closed frame sections of the skeletal framework comprise a planar area of between approximately 1.5 m 2 and approximately 4.5 m 2 .
5 . The recreational vehicle of claim 1 , wherein the closed frame sections of the skeletal framework comprise a maximum planar area of less than approximately 6.0 m 2 .
6 . The recreational vehicle of claim 1 , wherein a majority of the closed frame sections of the skeletal framework comprise a planar area that exceeds approximately 1.0 m 2 .
7 . The recreational vehicle of claim 1 , wherein the closed frame sections of the skeletal framework comprise a maximum unsupported longitudinal span of less than approximately 5.0 m.
8 . The recreational vehicle of claim 1 , wherein a majority of the closed frame sections of the skeletal framework comprise an unsupported longitudinal span of between approximately 1.5 m and approximately 4.0 m.
9 . The recreational vehicle of claim 1 , wherein a majority of the closed frame sections of the skeletal framework comprise a minimum unsupported longitudinal span that exceeds approximately 1.0 m.
10 . The recreational vehicle of claim 1 , wherein each of the plurality of foam core inserts comprises a density of at least 30 kg/m 3 ±10%.
11 . The recreational vehicle of claim 1 , wherein each of the plurality of foam core inserts comprises a density of between about 30 kg/m 3 ±10% and about 50 kg/m 3 ±10%.
12 . The recreational vehicle of claim 1 , wherein each of the plurality of foam core inserts frictionally engages at least two pairs of parallel frame segments of a closed frame section of the skeletal framework.
13 . The recreational vehicle of claim 1 , wherein each contained framework cell is packed with a single foam core insert that occupies a substantial entirety of the contained framework cell.
14 . The recreational vehicle of claim 1 , wherein each contained framework cell is packed with a plurality of foam core inserts that collectively occupy a substantial entirety of the contained framework cell.
15 . The recreational vehicle of claim 1 , wherein a foam thickness defined by the one or more foam core inserts packed in a contained framework cell is equal to a frame thickness of the frame segments of the closed frame section bounding the contained framework cell.
16 . The recreational vehicle of claim 1 , wherein a foam thickness defined by the one or more foam core inserts packed in a contained framework cell is greater than or less than a frame thickness of the frame segments of the closed frame section bounding the contained framework cell.
17 . The recreational vehicle of claim 1 , wherein the impact resistant sheet and the weather resistant sheet account for less than 20% of a total composite laminated panel thickness.
18 . The recreational vehicle of claim 1 , wherein the weather resistant sheet is characterized by:
an average sheet thickness that is less than an average sheet thickness of the impact resistant sheet; and
an area density that is less than 50% of an area density of the impact resistant sheet.
19 . The recreational vehicle of claim 18 , wherein:
the sheet thickness of the impact resistant sheet is 4.00 mm±20%;
the sheet thickness of the weather resistant sheet is 2.7 mm±10%;
the area density of the impact resistant sheet is 2850 g/m 2 ±10%; and
the area density of the weather resistant sheet is 1000 g/m 2 ±10%.
20 . The recreational vehicle of claim 1 , wherein:
the impact resistant sheet and the weather resistant sheet are fiberglass reinforced polymer sheets;
the fiber content of the impact resistant sheet and the weather resistant sheet is between about 35 wt. % and about 70 wt. % and impact resistant sheet comprises a greater fiber content than the weather resistant sheet; and
the impact resistant sheet and the weather resistant sheet define a fiber content A, representing a difference between a fiber wt. % content of the impact resistant sheet and a fiber wt. % content of the weather resistant sheet that is at least 20 wt. %.
21 . The recreational vehicle of claim 1 , wherein:
the impact resistant sheet and the weather resistant sheet are fiberglass reinforced polymer sheets;
the impact resistant sheet comprises a fiber content of about 60%; and
the weather resistant sheet comprises a fiber content of about 40%.
22 . A recreational vehicle comprising a composite laminated panel, wherein:
the composite laminated panel comprises a foam core insert, an impact resistant sheet on a first side of the composite laminated panel, a weather resistant sheet on a second side of the composite laminated panel, and a structural adhesive;
the structural adhesive is arranged to bond the foam core insert, the impact resistant sheet, and the weather-resistant sheet as a structurally integrated composite laminated panel;
each of the plurality of foam core inserts comprises a density of at least 30 kg/m 3 ±10%;
the impact resistant sheet and the weather resistant sheet account for less than 20% of the total composite laminated panel thickness;
the weather resistant sheet is characterized by an average sheet thickness that is less than an average sheet thickness of the impact resistant sheet and an area density that is less than 50% of an area density of the impact resistant sheet;
the sheet thickness of the impact resistant sheet is 4.00 mm±20%;
the sheet thickness of the weather resistant sheet is 2.7 mm±10%;
the area density of the impact resistant sheet is 2850 g/m 2 ±10%;
the area density of the weather resistant sheet is 1000 g/m 2 ±10%;
the impact resistant sheet and the weather resistant sheet are fiberglass reinforced polymer sheets;
the fiber content of the impact resistant sheet and the weather resistant sheet is between about 35 wt. % and about 70 wt. % and the impact resistant sheet comprises a greater fiber content than the weather resistant sheet; and
the impact resistant sheet and the weather resistant sheet define a fiber content A, representing a difference between a fiber wt. % content of the impact resistant sheet and a fiber wt. % content of the weather resistant sheet that is at least 20 wt. %.