Acoustical sound proofing material and methods for manufacturing same
An improved acoustical damping wall (ceiling or floor) or door material comprises a laminar structure having as an integral part thereof one or more layers of viscoelastic material which also functions as a glue and one or more constraining layers, such as metal, cellulose, wood, or petroleum-based products such as plastic, vinyl, plastic or rubber. In one embodiment, standard wallboard, typically gypsum, comprises the external surfaces of the laminar structure; and one or more constraining layers are fabricated between the gypsum exterior. The resulting structure improves the attenuation of sound transmitted through the structure.
1. A laminated, sound-absorbing structure which comprises:
a layer of first non-metallic material having two surfaces, one of said two surfaces comprising an outer surface, said non-metallic material being selected from the group consisting of gypsum, plywood, wood, and cellulose-based materials;
a layer of viscoelastic glue on the other of said two surfaces; and
a layer of a second material over said viscoelastic glue; and further wherein said viscoelastic glue comprises an amount between 5% by weight and 15% by weight of a compound selected from the group consisting of butyl acrylate, methyl acrylate, styrene, and methacrylic acid 2-hydroxyethyl acrylate polymer.
2. A laminated, sound-absorbing structure as in claim 1 , wherein said layer of second material is ½ to 9/10 the thickness of the first material.
3. A laminated, sound-absorbing structure which comprises:
a layer of first non-metallic material having two surfaces, one of said two surfaces comprising an outer surface, said non-metallic material being selected from the group consisting of gypsum, plywood, wood, and cellulose-based materials;
a layer of viscoelastic glue on the other of said two surfaces;
a layer of a second non-metallic material over said viscoelastic glue; and further wherein said viscoelastic glue comprises an amount between 5% by weight and 15% by weight of a compound selected from the group consisting of butyl acrylate, methyl acrylate, styrene, and methacrylic acid 2-hydroxyethyl acrylate polymer.
4. A laminated, sound-absorbing structure as in claim 3 , wherein said layer of second material is ½ to 9/10 of the first material.
5. A laminated, sound-absorbing structure for use in walls, floors, ceilings or doors which comprises:
a layer of first non-metallic material having two surfaces, one of said two surfaces comprising an outer surface, said non-metallic material being selected from the group consisting of gypsum, plywood, wood, and cellulose-based materials;
a layer of viscoelastic glue on the other of said two surfaces; and
a layer of a second material over said viscoelastic glue;
wherein said structure is capable of use in walls, floors, ceilings or doors to attenuate sound; and further wherein said viscoelastic glue comprises an amount between 5% by weight and 15% by weight of a compound selected from the group consisting of butyl acrylate, methyl acrylate, styrene, and methacrylic acid 2-hydroxyethyl acrylate polymer.
6. A laminated, sound-absorbing structure as in claim 5 , wherein said layer of second material is ½ to 9/10 of the first material.
7. A laminated, sound-attenuating structure for use in walls, floors, ceilings or doors, which comprises:
a layer of first non-metallic material having two surfaces, one of said two surfaces comprising an outer surface, said non-metallic material being selected from the group consisting of gypsum, plywood, wood, and cellulose-based materials;
a layer of viscoelastic glue on the other of said two surfaces; and
a layer of a second non-metallic material over said viscoelastic glue;
wherein said structure is capable of use in walls, floors, ceilings or doors to attenuate sound; and further wherein said viscoelastic glue comprises an amount between 5% by weight and 15% by weight of a compound selected from the group consisting of butyl acrylate, methyl acrylate, styrene, and methacrylic acid 2-hydroxyethyl acrylate polymer.
8. A laminated, sound-attenuating structure as in claim 7 , wherein said layer of second material is ½ to 9/10 the thickness of the first material.
9. A laminated, sound-attenuating structure which comprises:
a layer of gypsum having two surfaces, one of said two surfaces comprising an outer surface;
a layer of viscoelastic glue on the other of said two surfaces; and
a layer of a non-metallic material over said viscoelastic glue;
wherein said structure is capable of use in walls, floors, ceilings or doors to attenuate sound; and further wherein said viscoelastic glue comprises an amount between 5% by weight and 15% by weight of a compound selected from the group consisting of butyl acrylate, methyl acrylate, styrene, and methacrylic acid 2-hydroxyethyl acrylate polymer.
10. A laminated, sound-absorbing structure which comprises:
a layer of first non-metallic, non-glass material having two surfaces, one of said two surfaces comprising an outer surface, said non-metallic, non-glass material being selected from the group consisting of gypsum, plywood, wood, and cellulose-based materials;
a layer of viscoelastic glue on the other of said two surfaces; and
a layer of a second material over said viscoelastic glue; and further wherein said viscoelastic glue comprises an amount between 5% by weight and 15% by weight of a compound selected from the group consisting of butyl acrylate, methyl acrylate, styrene, and methacrylic acid 2-hydroxyethyl acrylate polymer.
11. A laminated, sound-absorbing structure as in claim 10 , wherein said layer of second material is ½ to 9/10 the thickness of the first material.
12. A laminated, sound-absorbing structure which comprises:
a layer of first non-metallic, non-glass material having two surfaces, one of said two surfaces comprising an outer surface, said non-metallic, non-glass material being selected from the group consisting of gypsum, plywood, wood, cellulose-based materials;
a layer of viscoelastic glue on the other of said two surfaces; and
a layer of a second non-metallic material over said viscoelastic glue; and further wherein said viscoelastic glue comprises an amount between 5% by weight and 15% by weight of a compound selected from the group consisting of butyl acrylate, methyl acrylate, styrene, and methacrylic acid 2-hydroxyethyl acrylate polymer.
13. A laminated, sound-absorbing structure as in claim 12 , wherein said layer of second material is ½ to 9/10 the thickness of the first material.
14. A laminated, sound-absorbing structure for use in walls, floors, ceilings or doors which comprises:
a layer of first non-metallic, non-glass material having two surfaces, one of said two surfaces comprising an outer surface, said non-metallic, non-glass material being selected from the group consisting of gypsum, plywood, wood, cellulose-based materials;
a layer of viscoelastic glue on the other of said two surfaces; and
a layer of a second material over said viscoelastic glue;
wherein said structure is capable of use in walls, floors, ceilings or doors to attenuate sound; and further wherein said viscoelastic glue comprises an amount between 5% by weight and 15% by weight of a compound selected from the group consisting of butyl acrylate, methyl acrylate, styrene, and methacrylic acid 2-hydroxyethyl acrylate polymer.
15. A laminated, sound-absorbing structure as in claim 14 , wherein said layer of second material is ½ to 9/10 the thickness of the first material.
16. A laminated, sound-attenuating structure for use in walls, floors, ceilings or doors, which comprises:
a layer of first non-metallic, non-glass material having two surfaces, one of said two surfaces comprising an outer surface, said non-metallic, non-glass material being selected from the group consisting of gypsum, plywood, wood, cellulose-based materials;
a layer of viscoelastic glue on the other of said two surfaces; and
a layer of a second non-metallic, non-glass material over said viscoelastic glue;
wherein said structure is capable of use in walls, floors, ceilings or doors to attenuate sound; and further wherein said viscoelastic glue comprises an amount between 5% by weight and 15% by weight of a compound selected from the group consisting of butyl acrylate, methyl acrylate, styrene, and methacrylic acid 2-hydroxyethyl acrylate polymer.
17. A laminated, sound-attenuating structure as in claim 16 , wherein said layer of second material is ½ to 9/10 the thickness of the layer of the first material.
18. A laminated, sound-attenuating structure which comprises:
a layer of gypsum having two surfaces, one of said two surfaces comprising an outer surface;
a layer of viscoelastic glue on the other of said two surfaces; and
a layer of a non-metallic, non-glass material over said viscoelastic glue;
wherein said structure is capable of use in walls, floors, ceilings or doors to attenuate sound; and further wherein said viscoelastic glue comprises an amount between 5% by weight and 15% by weight of a compound selected from the group consisting of butyl acrylate, methyl acrylate, styrene, and methacrylic acid 2-hydroxyethyl acrylate polymer.
19. A laminated, sound-attenuating structure as in claim 18 , wherein said layer of non-metallic, non glass material is ½ to 9/10 the thickness of the layer of gypsum.