| 摘要 |
A MULTILAYERED, SOUND-INSULATING, MECHANICALLY STRONG SANDWICH ELEMENT COMPRISING TWO FACING LAYERS (1) SUBSTANTIALLY ATTACHED TO A PLASTIC FOAM CORE CONSISTING OF AT LEAST TWO LAYERS (2) WHICH ARE JOINED THROUGH CONTACT POINTS (ALSO CALLED BRIDGES) (3) CREATING A GAP PR GAPS (4) BETWEEN THE CORE LAYERS (2) AND, IN CASE OF LONG SPANS AND/OR THIN FACING LAYERS, TRAVEL STOPS INSIDE THE GAP/GAPS (4) TO KEEP THE CORE LAYERS (2) AT A CERTAIN DISTANCE FROM EACH OTHER, WHEREIN THE CORE LAYER MATERIAL IS A SEMI-RIGID, CELLULAR MATERIAL CONTAINING MORE THAN 50 PERCENT OPEN CELLS, AND HAS A TENSILE STRENGTH OF MORE THAN 50kPa, AND HAS A COMPRESSIVE STRENGTH FROM 5 TO 200kPa, AT 10 PERCENT DEFORMATION. THE DISTANCE BETWEEN THE CONTACT POINTS OR BRIDGES (3) IS AT LEAST 350mm. THE NEW SANDWICH ELEMENT CAN BE USED AS A SOUND-INSULATING DOOR, A PARTITION ELEMENT OR A CONSTRUCTION UNIT.FIG 1
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