LOUDSPEAKER CONE BODY
First Claim
1. A method of forming a loudspeaker cone comprising:
- (a) contacting in a liquid medium a modified carbon nanotube that includes a first binding moiety with at least one of a paper-forming compound and a paper-treatment compound in a manner effective to retain the modified carbon nanotube to the one of the paper-forming compound and the paper-treatment compound to form a first adduct, the paper-forming and the paper-treatment compound together forming a paper compound; and
(b) forming the loudspeaker cone by one or more of the following;
(i) removing the liquid medium from the paper compound and the first adduct; and
(ii) reacting the first adduct with the paper compound n a manner effective to chemically bind the modified carbon nanotube to the paper compound.
5 Assignments
0 Petitions
Accused Products
Abstract
A loudspeaker cone body made of paper may include a chemically-bound nanomaterial, such as a carbon nanotube. The carbon nanotube may be chemically bound to a functionalizing agent having a chemical group chemically bound to one or more papermaking additives, such as a sizing agent or a wet strength agent, a dry strength agent, a resin or cellulose-containing papermaking stock material typically present in a paper loudspeaker cone body, such as pulp. Acoustic-related loudspeaker performance characteristics such as stiffness to weight ratio and an acoustic damping of the loudspeaker cone body may be altered by incorporation of the nanomaterials chemically bound to the loudspeaker cone body.
65 Citations
20 Claims
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1. A method of forming a loudspeaker cone comprising:
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(a) contacting in a liquid medium a modified carbon nanotube that includes a first binding moiety with at least one of a paper-forming compound and a paper-treatment compound in a manner effective to retain the modified carbon nanotube to the one of the paper-forming compound and the paper-treatment compound to form a first adduct, the paper-forming and the paper-treatment compound together forming a paper compound; and (b) forming the loudspeaker cone by one or more of the following; (i) removing the liquid medium from the paper compound and the first adduct; and (ii) reacting the first adduct with the paper compound n a manner effective to chemically bind the modified carbon nanotube to the paper compound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of forming a loudspeaker cone comprising:
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contacting paper-forming compound including cellulose with a liquid medium and agitating to produce a thick stock; contacting in the liquid medium a modified carbon nanotube that includes a first binding moiety with the thick stock and a paper-treatment compound that includes a retention aide in a manner effective to retain the modified carbon nanotube with the cellulose to form a first adduct; adding additional paper-treatment compound including functional and control additives to form a final papermaking furnish, the paper-forming compound and the paper-treatment together forming a paper compound; diluting the final papermaking furnish with additional liquid medium to form a thin stock; depositing the thin stock onto a filtering medium; progressively removing the liquid medium from the thin stock to produce a wet paper compound; and forming the loudspeaker cone including; applying heat to the wet paper compound to remove residual liquid medium from the paper compound and the first adduct; and reacting the first binding moiety and the paper compound in a manner effective to chemically bound the modified carbon nanotube to the paper compound. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A loudspeaker comprising:
a paper loudspeaker cone including; a modified carbon nanotube chemically bound to at least one of a cellulose-containing compound and a papermaking additive, the papermaking additive including material selected from the group consisting of a sizing agent, a resin, a wet strength additive, a dry strength additive and a retention and drainage agent.
Specification