6results about How to "Excellent tone" patented technology

An aluminum alloy sheet having a chemical composition comprising: Si of 0.51 mass% or more and 0.68 mass% or less, Fe of 0.17 mass% or more and 0.33 mass% or less, and Mg of 0.49 mass% or more and 0.55 mass% or less, with the balance consisting of Al and unavoidable impurities. The aluminum alloy sheet has a tensile strength of 250 MPa or more. The aluminum alloy sheet has a surface having an L value of 80 or more and a b value of -1.0 or more and less than 1.0 in a CIE1976 (L, a, b) color space when the hue of the surface is measured using a C light source after an anodizing treatment in a sulfuric acid bath.

This invention discloses a furan polyester composition, which is mainly composed of 2,5-furan dicarboxylic acid structural units and aliphatic diol structural units. The furan polyester composition contains germanium and antioxidants with specific structures. The furan polyester composition also exhibits good color tone and heat resistance, and can be used in fibers, films, engineering plastics, etc.

The utility model discloses a whistle. The whistle comprises a whistle body, the front end of the whistle body is provided with a sound outlet, the inner side of the sound outlet is provided with a second air hole, the other inner side of the sound outlet is provided with a first air hole, the first air hole is located in the axial orthographic projection area of the second air hole, and one end of the whistle body is provided with a mouthpiece communicated with the first air hole; a hollow part is arranged at the rear end of the whistle body, the whistle further comprises a sealing cover, the sealing cover covers the hollow part, and a resonant cavity is formed between the sealing cover and the hollow part; the mouthpiece, the first air hole, the second air hole, the resonant cavity and the sound outlet form an airflow channel; according to the utility model, the sealing cover and the whistle body can be manufactured and installed independently, and a user can flexibly adjust the shape and the space size of the resonant cavity according to actual requirements by replacing sealing covers with different shapes or sizes, so that the volume and the tone of sound are optimized; by means of the design, the problem that in the prior art, acoustic performance cannot be adjusted due to the fact that the resonant cavity is fixed is solved.

This utility model discloses an integrally molded oboe reed, which is made of plastic and includes a cylindrical segment, a rotating segment, and a reed segment arranged sequentially along a first direction. The cylindrical segment and the rotating segment are coaxially arranged, and the reed segment is fishtail-shaped. The outer peripheral wall of the reed segment extends from the end periphery of the outer peripheral wall of the rotating segment. The oboe reed has a through hole extending through the first direction. The through hole includes a gradually decreasing hole segment at one location corresponding to the gradually decreasing hole diameter from the cylindrical segment to the rotating segment, and a fishtail-shaped hole segment at one location corresponding to the reed segment. The fishtail-shaped hole segment extends from the end periphery of the gradually decreasing hole segment. The reed segment has a slit recessed at its end face that extends through the inside and outside of the fishtail-shaped hole segment. It has the following advantages: easy to manufacture, reducing costs; the plastic itself has a certain elasticity, and the slit enhances elasticity and allows vibration to be generated; unlike traditional reed reeds, it does not require soaking in water before use, making it convenient to use; and it has a good tone.

The present invention aims to provide a polycarbonate resin and a manufacturing method for a polycarbonate resin molded product, the polycarbonate resin being excellent in light resistance, transparency, color tone, heat resistance, thermal stability, and mechanical strength. The polycarbonate resin of the present invention contains at least a structural unit derived from a dihydroxy compound having a moiety represented by the following general formula (1) as a partial structure, wherein a case where the moiety represented by the general formula (1) is -CH2-O-H is excluded.

The present application discloses a kind of core sheath composite fibers, the core component of the core sheath composite fiber contains the particle A with refractive index of 1.4 or more, sheath component contains infrared absorbing particle B.The core sheath composite fiber reduces the amount of particle B while improving the utilization of light, achieves excellent heating effect, and improves the color tone, good productivity, can be applied to the field of fabric.