Reinforced acoustical material having high strength, high modulus properties
First Claim
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1. A method of forming an acoustic composite material comprising the steps of:
- providing an acoustic core layer formed of a composite material comprising dehydrated reinforcing fibers and organic fibers, said organic fibers having one or more of varying lengths and varying dernier to tune the acoustical behavior of said acoustic core layer to meet the needs of a desired application;
providing two outer strengthening layers of glass fibers;
positioning said acoustic core layer between said two outer strengthening layers;
bonding said acoustic core layer to said outer strengthening layers to form an acoustic composite material; and
simultaneously with the step of forming an acoustic composite material, compressing said acoustic composite material to reduce said acoustic core layer to a uniform thickness, the acoustic composite material having a uniform weight, a uniform strength, and uniform acoustic properties.
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Abstract
A multilayer composite material is formed of an acoustic core layer and at least one outer strengthening layer. The acoustic composite material has desirable high strength and high flexural modulus properties.
125 Citations
31 Claims
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1. A method of forming an acoustic composite material comprising the steps of:
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providing an acoustic core layer formed of a composite material comprising dehydrated reinforcing fibers and organic fibers, said organic fibers having one or more of varying lengths and varying dernier to tune the acoustical behavior of said acoustic core layer to meet the needs of a desired application; providing two outer strengthening layers of glass fibers; positioning said acoustic core layer between said two outer strengthening layers; bonding said acoustic core layer to said outer strengthening layers to form an acoustic composite material; and simultaneously with the step of forming an acoustic composite material, compressing said acoustic composite material to reduce said acoustic core layer to a uniform thickness, the acoustic composite material having a uniform weight, a uniform strength, and uniform acoustic properties. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of forming an acoustic composite material comprising:
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positioning an acoustic core layer next to a major surface of at least one outer strengthening layer, said acoustic core layer being formed of a composite material comprising dehydrated reinforcing fibers and organic fibers; bonding said acoustic core layer to said at least one outer strengthening layer to form an acoustic composite material; and simultaneously with the step of forming an acoustic composite material, compressing said acoustic composite material to reduce said acoustic core layer to a uniform thickness, said acoustic composite material having a uniform weight, a uniform strength, and uniform acoustic properties. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A method of forming an acoustic composite material comprising:
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positioning an acoustic core layer next to a major surface of at least one outer strengthening layer, said acoustic core layer being formed of a composite material comprising dehydrated reinforcing fibers and organic fibers, said organic fibers having one or more of varying lengths and varying dernier to tune the acoustical behavior of said acoustic core layer to meet the needs of a desired application, and bonding said acoustic core layer to said outer strengthening layer to form an acoustic composite material; and simultaneously with the step of forming an acoustic composite material, compressing said acoustic composite material to reduce said acoustic core layer to a uniform thickness, said acoustic composite material having a uniform weight, a uniform strength, and uniform acoustic properties. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of forming an acoustic composite material comprising the steps of:
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providing an acoustic core layer formed of a composite material comprising dehydrated reinforcing fibers and organic fibers, said acoustic core layer having a basis weight within the range of from about 800 g/m2 to about 1400 g/m2; providing two outer strengthening layers of glass fibers, said outer strengthening layers each having a basis weight within the range of from about 100 g/m2 to about 200 g/m2; positioning said acoustic core layer between said two outer strengthening layers; bonding said acoustic core layer to said outer strengthening layers to form an acoustic composite material; and compressing said acoustic composite material to reduce said acoustic core layer to a uniform thickness, the acoustic composite material having a uniform weight, a uniform strength, and uniform acoustic properties.
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31. A method of forming an acoustic composite material comprising the steps of:
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providing an acoustic core layer formed of a composite material comprising dehydrated reinforcing fibers and organic fibers, said organic fibers having one or more of varying lengths and varying dernier to tune the acoustical behavior of said acoustic core layer to meet the needs of a desired application, said acoustic core layer having a first stiffness; providing two outer strengthening layers of glass fibers; positioning said acoustic core layer between said two outer strengthening layers; bonding said acoustic core layer to said outer strengthening layers to form an acoustic composite material, said acoustic composite material having a second stiffness; and compressing said acoustic composite material to reduce said acoustic core layer to a uniform thickness, the acoustic composite material having a uniform weight, a uniform strength, and uniform acoustic properties; wherein the second stiffness of said acoustic composite material is within the range of from about 17 percent to about 55 percent greater than the first stiffness of said acoustic core layer.
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Specification