Acoustic web
First Claim
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1. A method for laminating an adhesive layer to a semipermeable airflow resistive membrane, comprising treating the airflow resistive membrane to reduce its surface energy before laminating the adhesive layer to the membrane.
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Abstract
Pore plugging is reduced when laminating an airflow resistive membrane to a thermoplastic hot melt adhesive, by treating the membrane to reduce its surface energy. This enables fabrication of acoustical laminates incorporating substantial amounts of recycled fibrous insulating mat manufacturing waste, and permits design of the laminate based primarily on one-quarter wavelength sound absorption considerations and control of the porosity and interfacial adhesion of the airflow resistant membrane.
154 Citations
30 Claims
- 1. A method for laminating an adhesive layer to a semipermeable airflow resistive membrane, comprising treating the airflow resistive membrane to reduce its surface energy before laminating the adhesive layer to the membrane.
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10. A method for making a sound-modifying structure comprising:
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a) providing a stack of layers comprising a decorative facing layer, a thermoplastic adhesive layer, a porous membrane that has been treated to render the membrane substantially impenetrable by molten polyethylene, and a layer of fibrous material, and b) laminating the stack of layers together under sufficient heat and pressure to form a unitary porous sound-modifying structure. - View Dependent Claims (11, 12, 17, 18)
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13. A method for attenuating sound waves passing from a source area of a vehicle to a receiving area of the vehicle, comprising
a) providing an acoustical laminate comprising a fibrous or open cell foam underlayment, a hot melt adhesive layer, a porous membrane that has been treated to render the membrane substantially impenetrable by molten polyethylene, a hot melt adhesive layer, and a decorative layer; - and
b) positioning the laminate between the source area and the receiving area such that a major face of the laminate intercepts and thereby attenuates sound waves passing from the source area to the receiving area. - View Dependent Claims (14, 15)
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16. A porous laminate comprising a discontinuous hot melt adhesive layer adhered to a semipermeable low surface energy airflow resistive porous membrane whose pores are substantially impenetrable by the adhesive.
- 19. A sound-absorbing laminate having a porous sound-absorbing spacing layer adjacent to a semipermeable airflow resistive membrane that is substantially impenetrable by molten polyethylene.
- 21. A porous laminate comprising a thermoplastic adhesive layer adjacent to a semipermeable fluorochemically-treated airflow resistive membrane.
- 24. A sound-modifying structure comprising a sound-reflecting surface spaced from a semipermeable sound modifying laminate comprising a facing layer and a porous membrane that is substantially impenetrable by molten polyethylene.
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27. A vehicular sound-absorbing structure comprising a decorative layer backcoated with a discontinuous hot melt adhesive layer adhered to a fluorochemically-treated nonwoven airflow resistive membrane having an airflow resistance between 50 and 5000 mks Rayls.
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28. A carpet comprising fibers tufted into a backing backcoated with a discontinuous hot melt adhesive layer adhered to a fluorochemically-treated nonwoven airflow resistive membrane having an airflow resistance between 50 and 5000 mks Rayls.
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29. An acoustical laminate comprising:
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a) a fibrous or open cell foam underlayment, b) a hot melt adhesive layer, c) a fluorochemically-treated nonwoven airflow resistive membrane having an airflow resistance between 50 and 5000 mks Rayls, d) a hot melt adhesive layer, and e) a decorative layer. - View Dependent Claims (30)
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Specification