15results about How to "Excellent tone" patented technology

In a titanium oxide powder of this invention, a ratio (IA / IR) of a peak intensity (IA) of anatase-type crystals to a peak intensity (IR) of rutile-type crystals as measured by X-ray diffractometry is 0.1 or less; particles contained in the powder have an average short-axis length from 10 to 50 nm and an average aspect ratio from 1 to 3; a ratio (A450 / A320) of an absorbance A450 at a wavelength of 450 nm to an absorbance A320 at a wavelength of 320 nm is from 0.015 to 0.5; and the powder contains a nitrogen atom and a peak derived from the nitrogen atom is observed from 395 to 402 eV in ESCA (Electron Spectroscopy for Chemical Analysis) measurement. A titanium oxide powder is thus provided that contains rutile-type crystals as a main component and has an excellent UVA shielding effect, high safety for the human body, and good color tone.

The utility model discloses a kind of hidden combination type record players, including hidden combination structure, electromagnetic levitation system, built-in curved surface sound guide cavity, automatic control module and remote control receiving module, the hidden combination structure includes main body and telescopic storage bin, the telescopic storage bin is slidably connected in main body interior, the telescopic storage bin is used to store the playing assembly of record player, the electromagnetic levitation system is installed in telescopic storage bin;Hidden combination structure is realized the hidden storage of playing assembly by telescopic storage bin, save space, electromagnetic levitation system makes playing assembly levitate, avoid vibration interference, effectively improve tone stability, built-in curved surface sound guide cavity uses the aluminum alloy material of arc structure, combined with sound insulation damping layer, both enhance sound power, and optimize tone, realize the effect of big power, beautiful sound, automatic control module and remote control receiving module cooperate, realize automatic playing, remote control function.

A double-beam liuqin includes a resonance box, the body of which is composed of a panel and a bottom plate, and is characterized in that: two upper sound beams are fixedly arranged in parallel on the inner wall of the panel; a transverse groove and a longitudinal groove are provided on the inner wall of the panel, and the transverse groove and the longitudinal groove are mutually connected to form a transverse sound tunnel and a longitudinal sound tunnel; a transverse sound beam is fixedly arranged between the panel and the bottom plate, and the transverse sound beam and the two upper sound beams are combined to divide the space corresponding to the inner wall of the panel into six resonance areas. This scheme breaks the constraints of the traditional design of the internal structure of the liuqin resonance box in the past, and boldly proposes a new improved design scheme, which solves the problem that the liuqin in the past could not take into account the high, middle and low pitch areas and have good resonance timbre and penetration at the same time, so that the penetration of the liuqin sound (small attenuation, far transmission) is greatly enhanced, the high pitch area is bright and rigid, the middle pitch area is soft and mellow, and the bass area sound quality is more mellow.

This utility model discloses a composite horn, designed to add a diffuser tube to make the sound clearer and brighter, and improve the timbre. The technical solution is as follows: A composite horn includes a mounting plate, a horn body, and a diffuser tube; the mounting plate has a through hole; the horn body gradually tapers along a first direction, and the smaller end of the horn body is fixed to the mounting plate and covers the through hole; the diffuser tube includes a tapered tube and a straight tube sequentially joined along the first direction, the inner diameter of the tapered tube gradually decreasing along the first direction, and the straight tube passing through the through hole; the distance from the end of the tapered tube away from the straight tube to the mounting plate is greater than or equal to the distance from the end of the horn body away from the mounting plate to the mounting plate, belonging to the field of audio 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.

A double-beam violin without a sound post includes a resonance box, which is composed of a panel, a bottom plate and a side plate, and is characterized in that: two upper sound beams are fixedly arranged in parallel on the inner wall of the panel; two lower sound beams are fixedly arranged in parallel on the inner wall of the bottom plate; an upper cross-shaped groove is provided on the inner wall of the panel, and the upper cross-shaped groove forms an upper cross-shaped sound tunnel on the inner wall of the panel; a lower cross-shaped groove is provided on the inner wall of the bottom plate, and the lower cross-shaped groove forms a lower cross-shaped sound tunnel on the inner wall of the bottom plate. This scheme breaks the constraints of the traditional bass beam and sound post design in the violin resonance box, cancels the sound post in the violin resonance box, and boldly proposes a new improved design scheme, which solves the problem that the high pitch area of ​​the violin is not bright, and the bass area is not thick and round enough, so that the existing violin resonance box can well take into account the high, middle and bass areas and have good timbre.

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.

A double-beam pipa includes a resonance box, the box body of which is composed of a panel and a bottom plate, and is characterized in that: two upper beams are fixedly arranged in parallel on the inner wall of the panel; a transverse groove and a longitudinal groove are provided on the inner wall of the panel, and the transverse groove and the longitudinal groove are mutually connected to form a transverse sound tunnel and a longitudinal sound tunnel; a transverse beam is fixedly arranged between the panel and the bottom plate, and the transverse beam and the two upper beams are combined to divide the space corresponding to the inner wall of the panel into six resonance areas. This scheme breaks the constraints of the traditional design of the internal structure of the pipa resonance box in the past, boldly proposes a new improved design scheme, solves the problem that the pipa in the past could not take into account the high, middle and low pitch areas and have good resonance timbre and penetration at the same time, and greatly enhances the penetration of the pipa sound (small attenuation, far transmission), the high pitch area is bright and rigid, the middle pitch area is soft and mellow, and the bass area has a more mellow sound quality.

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 invention relates to the field of oral care products, and particularly discloses a preparation method of whitening and antiallergic toothpaste which comprises the following raw materials: deionized water, an abrasive, a traditional Chinese medicine extract, sodium phytate, a microcapsule desensitizer, torreya grandis seed oil, sorbitol, cocamidopropyl betaine, xanthan gum and sodium carboxymethyl cellulose. The preparation method comprises the following steps: mixing the xanthan gum, the sodium carboxymethyl cellulose, the sorbitol and the deionized water, stirring and dispersing, then adding the abrasive, the sodium phytate and the cocamidopropyl betaine, stirring and dispersing in vacuum, finally adding the traditional Chinese medicine extract, the microcapsule desensitizer and the torreya grandis seed oil, continuously stirring and dispersing, and vacuumizing, discharging and filling in a vacuum state. The whitening and antiallergic toothpaste is obtained. The whitening anti-allergic toothpaste prepared by the invention is proper in friction value, excellent in tooth stain and dental plaque removal effect, remarkable in tooth whitening effect, capable of solving the problem of dentin hypersensitivity in multiple aspects and remarkable in anti-allergic effect.

Provided in the present application are a PBAT resin composition, and a preparation method therefor and the use thereof. The PBAT resin composition comprises a PBAT resin and a cyclopentalkenylene conjugated-structure compound, wherein the mass content of the cyclopentalkenylene conjugated-structure compound in the PBAT resin composition is 0.05-100 ppm. The PBAT resin composition has a low color value and an excellent color stability while having a relatively high molecular weight and good mechanical properties; and the PBAT resin composition has an excellent hue and can fully meet the requirements of machine shaping such as film blowing, a low haze and a better clearness and transparency are obtained after film blowing, and the appearance and mechanical properties of the product are comprehensively improved. A resin composition containing the PBAT resin composition has good mechanical and physical properties, and can fully meet the use requirements of various film bag products.

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.

A thermoplastic resin composition including a polycarbonate resin with a structural unit (A) represented by the following formula (1), wherein a hydrolysate produced by hydrolyzing the polycarbonate resin contains dihydroxy compounds represented by the following formulae (2) to (4), and a total amount of the dihydroxy compound represented by the formula (3) and the dihydroxy compound represented by the formula (4) in the hydrolysate is 0.85% by mass or more of an amount of the dihydroxy compound represented by the formula (2).