Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPS5755697 [Description of the invention] Acoustic parts Acoustic parts characterized in that thermosetting resin is used as a binder of polyoxymethylene whiskers. Claims DETAILED DESCRIPTION OF THE INVENTION In general, the first condition of physical properties required for a speaker head 7, a diaphragm such as a microphone, a shell of a cartridge, a shell of a cartridge, a cantilever of a tone arm cartridge, a cabinet of a speaker, etc. It is high. When the Young's modulus is large, for example, in the diaphragm, the divided vibration can be driven to a high frequency. Recently, in order to increase the Young's modulus, attempts have been made to blend inorganic substances such as mica into a thermosetting resin such as epoxy, to form a prepreg or molding composite, and then to heat cure to obtain an acoustic component. However, this mica etc. is used as a binder and has poor wettability with thermosetting resins such as epoxy resin, and the acoustic parts manufactured from this K are extremely fragile, and there is a defect that the strength is small, and this mica etc. has good properties Physical characteristics, and there was a disadvantage that was not attractive. On the other hand, polyoxymethylene single crystal whiskers obtained by the method developed by the Institute of Industrial Technology, Fiber and Polymer Materials Research Institute of the Ministry of Trade and Industry have a Young's modulus of about 1 × 1 N / m and are as large as carbon fibers. The single crystal whiskers are preferably wet with a binder of a thermosetting resin such as epoxy. Further, since the polyoxymethylene whisker has a shape in which an infinite number of needles project radially from one point, all physical properties of the composite with epoxy or the like are not directional. . The present invention is intended to obtain an acoustic component having favorable acoustic characteristics in which the acoustic component using such polyoxymethylene whiskers can be made to be able to sufficiently exhibit the physical 11-05-2019 1 characteristics of the polyoxymethylene whiskers in%. It is a thing. In the following, with reference to the drawings, an example of an acoustic component according to the present invention will be described with reference to EndPage: 1 with an example of a speaker diaphragm as well as an example of its method of loss. In this example, as a thermosetting resin in a container (1), 75 g (7-fold b) of polyoxymethylene whisker (3) is further added, and heat is not applied to the mixer (4). Knead. This mixed material * m is injected into the mixture and preheated to form a prepreg sheet (5) as shown in the 21st WK. The prepreg sheet (5) or the premix is cured at 70 ° C. for 20 minutes by a heating compression molding machine (6) to form a diaphragm of a speaker. The tensile Young's modulus of the diaphragm of the loudspeaker according to this example is 4.87 × 1 G (N, / m) when added using a visco-elastic spectrometer, and such a thermosetting resin Compared to whiskers (Young's modulus 2.85 × 1 G without N 3 and N 70%), the improvement is almost double. Further, in the same manner as described above, 50 g of the above-mentioned thermosetting epoxy resin (manufactured by SHELL, manufactured by Shell, product name: Engineering butt 828), shell 39. Using this product 100140 g BF $ MBA 3.3 g, this mixture is injected into the mold at equal pressure and preheated to form a prepreg sheet (5). Also, the mixed material is cured for a predetermined time and then at 160 ° C. for 1 hour to form a speaker diaphragm. The tensile Young's modulus of the diaphragm of the speaker according to this example was measured using a visco-elastic spectrometer and found to be 3.77 × 10 (N 7 m), and such a thermosetting resin (2) was a polyoxymethylene whisker ( 3) Young's modulus 3.22 × 1 GCN 7 m) K is improved in comparison with no addition. When the polyoxymethylene whiskers (the amount of 3 (1.0 g (1, 1 wt%), 1.9 g (2, 1 wt%)) added to the above-mentioned thermosetting resin (2) are the same as described above The Young's modulus of the diaphragm obtained by T. et al. Was 3.66 × to (N / normal), 3 near 3 × 1♂ (N / 嘱 2). From this, it is understood that increasing the amount of polyoxymethylene whiskers (3) to be added to the thermosetting resin (2) improves the Young's modulus. Therefore, a reinforced diaphragm can be obtained by using a thermosetting resin as a polyoxymethylene whisker binder. Furthermore, the polyoxymethylene whiskers are colored by obtaining a strong vibration plate which is very wet with thermosetting resins such as unsaturated polyesters and epoxy yarn resins, and the physical properties of polyoxymethylene whiskers are favorable. The characteristics can be sufficiently exhibited. Furthermore, since this polyoxymethylene whisker has a shape in which a large number of needles project radially from one point, there is no directivity in the physical properties of the composite, which is advantageous as an acoustic property. In the above example, whiskers of polyoxymethylene and a thermosetting resin were kneaded, and this kneaded material was busy making it into prepreg or molding and then heat forming. The whiskers and other fibrous material bundles Ib-powder etc. are mixed, and a mat is manufactured from this mixture, and the mat is coated with a thermosetting resin impregnated and sprayed to make a prepreg, which is then heated. It can be easily understood that the same function and effect as described above can be obtained even if the diaphragm of the speaker is obtained by heat-hardening molding with a 11-05-2019 2 compression molding machine. In the above embodiment, although the present invention is applied to the diaphragm of the speaker, the present invention is applied to the head shell of the cartridge, tone arm, car) other acoustic components such as a cantilever of U-edge, speaker cabinet, etc. Of course it can be applied to In this case, it is easy to understand that, according to the present invention, the acoustic characteristics are superior, so that the characteristically good acoustic component can be obtained and the EndPage: 2 can be obtained. Although unsaturated polyester and epoxy resin are used as the thermosetting resin in the above embodiment, it goes without saying that other thermosetting resins such as phenol resin can be used instead. Of course, the present invention is not limited to the above-described embodiment, and various other configurations can be taken without departing from the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1, FIG. 2 and FIG. 3 are diagrams showing an example of a method of manufacturing an embodiment of an acoustic component according to the present invention wAK. (2) is a thermosetting resin, (3) is a polyoxymethylate / whisker, and (5) is a prepreg sheet. Same 1 feM '! −。 第 Figure 2 = 〒 = EndPage: 3 11-05-2019 3
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