OPTIMIZED PATTERN OF A DAMPING LAYER FOR WALL, FLOOR, AND CEILING CONSTRUCTIONS
An acoustic damping article includes a substrate, wherein the substrate has a surface area S. The acoustic composition further includes a polymer resin. The polymer resin coats partially the surface area with a set of areas. The ratio of the coated areas over the surface area S is less than 1 and the polymer resin coverage is not greater than about 500 g/m 2 .
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3 . An acoustic damping article comprising:
a substrate, the substrate having a side, the side having a total surface area S t ;
a polymer resin, wherein the polymer resin partially coats the side in a set of n areas, S c1 , . . . , S cn , wherein n≧1 and a ratio of the sum of coated areas S c over the surface area S t is less than 1; wherein the acoustic damping article has a modal damping factor in the range between 50 to 850 Hz of at least about 10%.
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5 . The acoustic damping article according to claim 3 , wherein the acoustic damping article has a modal damping factor in the range between 700 to 1500 Hz of at least about 10%.
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7 . The acoustic damping article according to claim 3 , wherein the acoustic damping article has a modal damping factor in the range between 1500 to 4000 Hz of at least about 10%.
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17 . An acoustic damping article comprising:
a substrate, the substrate having a side, the side having a total surface area S t ;
a polymer resin, the polymer resin having a shear modulus G′ at 1000 Hz and at room temperature and a thickness t, wherein the polymer resin partially coats the side in a set of n areas, S c1 , . . . , S cn , wherein n≧1 and a percentage coverage p is the quotient of the sum of coated areas S c over the surface area S t is less than 1;
wherein a Patterned Interlayer Stiffness (G′×p)/t is at least about 0.7 GN/m 2 .
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20 . The acoustic damping article according to claim 17 , wherein p is at least about 0.1.
21 . The acoustic damping article according to claim 17 , wherein p is not greater than about 0.95.
22 . The acoustic damping article according to claim 17 , wherein t is at least about 50 microns.
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24 . The acoustic damping article according to claim 17 , wherein the polymer resin has a glass transition temperature not greater than about 40° C.
25 . The acoustic damping article according to claim 17 , wherein the polymer resin has a shear modulus G′ of not greater than about 100 MPa at about 1000 Hz and at room temperature.
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27 . The acoustic damping article according to claim 25 , wherein the shear modulus G′ is at least about 0.2 MPa.
28 . The acoustic damping article according to claim 17 , wherein the polymer resin has an inherent damping loss factor of at least about 0.4 at about 1000 Hz and at room temperature.
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30 . The acoustic damping article according to claim 17 , wherein at least one area of the set of coated areas is in the shape of a rectangle, a square, a triangle, a pentagon, a hexagon, a circle, a circular section, a ring, a half ring, or any combination thereof.
31 . The acoustic damping article according to claim 30 , wherein the rectangle is defined by sides a and b, wherein a proportion of length (a)/length (b) is greater than about 50.
32 . The acoustic damping article according to claim 17 , wherein the set of coated areas forms a pattern of stripes.
33 . The acoustic damping article according to claim 32 , wherein the pattern is at least one of straight stripes, wavy stripes, zig-zag stripes, parallel stripes, or a combination thereof.
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35 . The acoustic damping article according claim 17 , wherein the substrate is selected from a wall panel, a ceiling panel, a dry wall, a tile, a subfloor panel, or a plastic sheet.
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42 . A method of preparing a construction panel, the method comprising: coating a first major surface of a first rigid panel with a polymer resin in a set of areas, the polymer resin having a shear modulus G′ at 1000 Hz and at room temperature and a thickness t, wherein the polymer resin partially coats the surface in a set of n areas, S c1 , . . . , S cn , wherein n≧1 and a percentage coverage p is the quotient of the sum of coated areas S c over the surface area S t is less than 1;
wherein a Patterned Interlayer Stiffness (G′×p)/t≧0.7 GN/m 3
43 . The method according to claim 42 , wherein the areas are selected from a rectangle, a square, a triangle, a pentagon, a hexagon, a circle, or a ring.
44 . The method according to claim 42 , wherein the areas form a pattern of stripes.
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46 . The method according to claim 42 , wherein the coating includes spraying, brushing, trowelling, plating, or stenciling.
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