2500results about How to "Improve sound absorption" patented technology

The invention discloses a nanometer high temperature resistant thermal insulation and prevention coating. SiO2 aerogel, modified potassium hexatitanate whisker, aluminum silicate fiber, ultra-fine cenosphere, nanometer TiO2 and nanometer Al2O3 are used as a thermal insulation filler. A vacuum thermal insulation layer is formed by nano porous structures of SiO2 aerogel and cenosphere. The aluminum silicate fiber is used as a reinforcing and toughening material. The infrared shading performance of potassium hexatitanate whisker, nanometer TiO2 and nanometer Al2O3 are used as a thermal radiation shielding layer. A silicon resin emulsion and an acrylic emulsion are compounded to be an adhesive. Therefore, the nanometer 600 DEG C temperature resistant thermal insulation and prevention coating is prepared with matching of a variety of functional additives. The nanometer high temperature resistant thermal insulation and prevention coating has the characteristics of scumbling, thermal insulation, waterproofing, anti-crack, anti-corrosion, high temperature resistance, weather-proofing, durability and the like and is applicable to the field of industrial high temperature resistant thermal insulation energy conservation.

A sound absorbing-insulating structure for vehicles includes a sound absorbing layer which contains cellulose fibers containing cotton yarns, pulp fibers, etc. and synthetic resin as principle components. The sound absorbing-insulating structure for vehicles, in which a content rate of the synthetic resin is in the range of 0.01 to 80 wt %, and a surface density is in the range of 0.2 to 3 kg/m2, is provided. This sound absorbing-insulating structure has a good sound absorbing-characteristic and is light in weight and inexpensive in cost.

The invention relates to a low cost and high efficient soundproof material and a manufacturing method thereof, relates to the field of soundproof materials, solves the problems that in the prior art, soundproof materials do not have a prominent soundproofing effect, generate harmful gas, which can harm the human health, and have a high cost; and provides a low cost and high efficient soundproof material. The soundproof material comprises thermoplastic resin and an inorganic filling material, wherein the surface of the inorganic filling material has been processed by a coupling agent processing liquid, the inorganic filling material accounts for 15 to 80 wt% of the total weight of the soundproof material, and the balance being thermoplastic resin. In the soundproof material, the connections among the particles are abnormal, thus the internal friction of the incident sound waves is increased by the structure of the soundproof material, and a relaxation effect is generated to absorb the sound waves. Filling materials with different particle sizes are corresponding to waves in different wavelengths or frequencies, so the soundproof material can reduce sounds in different frequencies. Moreover the soundproof material has a good soundproof effect and is suitable for being promoted and used.

The invention relates to porous concrete and a preparation method thereof, in particular to novel nano porous concrete which is prepared by taking thixotropic colloid as a template agent to form a uniform-water-phase three-dimensional network nano porous structure and adding cementing materials, fine aggregate, coarse aggregate, an admixture and an additive. The nano porous concrete has the characteristics of being light, high in strength and low in heat conductivity, can be prefabricated into bricks, building blocks, plates, and assembly type stairs, wallboards, balcony slabs and roof panel parts in a factory, can be also cast on a construction site, and further can be prepared into mortar, thereby having remarkable practical significance on promotion of development of housing industrialization and green building concrete material in our country.

A component support allows cost-effective, space-saving and low-stress packaging of MEMS components having a sensitive structure. The component support is suited, in particular, for MEMS components, which are mounted in the cavity of a housing and are intended to be electrically contacted. The component support is produced as a composite part in the form of a hollow body open on one side, the composite part being made essentially of a three-dimensionally shaped carrier foil flexible in its shaping, and an encasing material. The encasing material is molded onto one side of the carrier foil, so that the carrier foil is situated on the inner wall of the component support. At least one mounting surface for at least one component is formed on the inner wall having the carrier foil. The carrier foil is also provided with contact surfaces and insulated conductive paths for electrically contacting the at least one component.

The invention discloses a nano modified water-base multifunctional sound-absorbing paint and a preparation method thereof. The paint is composed of the following components in parts by weight: 28-38 parts of emulsion, 2-10 parts of pigment, 30-45 parts of filler, 15-25 parts of water, 4-8 parts of flame retardant and 2.25-5.43 parts of assistant. By optimizing the paint system structure, the polymer and filler are selected, modified and proportioned to ensure the basic mechanical properties and sound-absorbing function, and the paint has high-value service properties, such as thermal insulation, moisture resistance, fire resistance, aging resistance, fouling resistance, sterilization, air purification and the like, and is especially suitable for rooms and other occasions with higher environmental requirements.

The invention discloses a sound-absorbing coating material, wherein every 100 parts by mass of coating contains 5-50 parts by mass of sound-absorbing function materials, 0.1-35 parts by mass of flame retardant materials, 10-40 parts by mass of binding materials, and the balance of an inorganic filling, an assistant and water in a common coating. The sound-absorbing function materials are selected from one or composite of some of materials such as slag fibers, mineral fibers, glass fibers and wood fibers, with fiber structures, and the sound-absorbing function materials are subjected to waterproof modification treatment. According to the invention, NRC (Noise Reduction Coefficient) of the coating material is tested to be more than 0.4 by using a standing wave tube method, and the sound-absorbing coating material has a good sound-absorbing denoising performance, excellent flame resistance and low heat conductivity coefficient, can be used for reducing the energy consumption of a building, is an environmental-friendly functional sound-absorbing coating material integrated with functions of sound absorption, flame resistance and decoration, and can be used on the surface of the building.

The invention relates to a multiple helmholtz resonator parallel cellular sandwich wood sound absorption plate, belonging to the field of sound absorption technologies. The invention solves the problems of small chamber volume ratio, narrow sound absorption frequency band and poor sound absorption effect in the traditional sound absorption panels. Technical essential is characterized in that a sandwich layer is a cellular sandwich layer; the cellular sandwich layer is formed from splicing a plurality of cylinder bodies with hexagonal cross sections; an inner cavity of each hexagonal cylinder body is a cell cavity chamber; the chamber volume ratio of the sandwich layer is larger than 90%; the area of perforation shape surrounded by contour lines of each perforation is less than a half of the hexagonal area of corresponding sandwich layer; and each small through hole on a panel is communicated with the cell cavity chamber at the corresponding position of the sandwich layer. The invention has wider sound absorption frequency band and better medium high frequency sound absorption performance, and the sanding wave tube method sound absorption coefficients respectively reach 0.8, 0.9 and 0.7 at 500Hz, 1000Hz and 2000Hz. In addition, the invention also has the characteristics of light weight, high ratio of strength to weight, good decorative effect, and the like; and wood resources can be saved, preparation process is simple, and cost is low.

The invention discloses a method for preparing air-laying cellucotton and cellucotton produced by the method. Taking low melting point fibers and other fibers as raw material, the cellucotton is produced by rough shape cutting, coarse opening, fine opening, air laying, hot binding and parting cut packaging, wherein the air laying is as follows: the loose fibers which are distributed evenly in a cotton box after fully mixed by the fine opening are further mixed by airflow and delivered by pressurized airflow to between the net forming curtain and the net forming roller to be formed into a required retiform structure. The preparing process has wide range of material selection, is suitable for not only all the raw materials adopted in the prior process, but also the plant fiber widely existing in the natural world which are not used in the prior art such as couch grass, reed, cornstock, straw and bagasse as raw materials, and the waste materials such as wood wool, crushed sponge and wool manufacturing crushed aggregates to reuse and regenerate; in addition, the preparing process has high production efficiency and low energy consumption, and produces the cellucotton with great improvement in the performance, thereby being applied to wider fields.

The waste material collected from polish waste water and waste slag via deposition, press filtering and ageing is mixed with high temperature sand, kaolin and low temperature sand. The mixture is wet milled in a ball mill, 250-mesh sieved, iron eliminated and spray dried to form powdered material; the powdered material is dry formed into ceramic tile adobe in a ceramic press; and the ceramic tile adobe is baked in a roller hearth kiln at 1140-1200 deg.c in 40-75 min. The said method utilizes the waste reasonably and the product has excellent performance.

The invention relates to the field of composite materials for automobile exterior trimming parts, in particular to a light fiber-reinforced thermoplastic plate used for a high-performance passenger vehicle bottom protection plate and a preparation technology thereof. The plate comprises a surface material layer, a netty hot melt adhesive film, an anti-impact inflaming retarding layer, a sound absorbing layer, an anti-impact inflaming retarding layer, a netty hot melt adhesive film and a surface material layer from top to bottom in sequence. According to the technology, after thermoplastic resin fibers and reinforced fibers in different proportions are subjected to opening by an opener, cross lapping is carried out, mixed powder of polyolefin rubber powder and inflaming retarding filler in different proportions is added by a powder distributor, 140-degree infrared roasting is carried out, and finally, a fiber-reinforced thermoplastic felt and the like are obtained after the needling of different needle punching technologies. The light fiber-reinforced thermoplastic plate has excellent anti-impact, sound-absorbing and inflaming retarding performances, and effectively solves various problems which are encountered when the existing common bottom protection plates in the market are used; the preparation technology is simple, convenient, feasible, flexible and varied, the performances of products are designed according to the practical application needs, and the production efficiency is optimized.

The invention discloses PET (polyethylene glycol terephthalate) fiber/teflon fiber composite sound absorbing cotton, which is prepared from the following ingredients in parts by weight: 70 to 80 parts of PET fibers, 40 to 50 parts of teflon fibers, 10 to 15 parts of emulsifying agents OP-30, 5 to 10 parts of peregal O-20, 80 to 100 parts of PP (propene polymer), 30 to 40 parts of HIPS (high impact polystyrene), 15 to 20 parts of activated clay, 10 to 15 parts of modified kieselguhr, 2 to 3 parts of stearic acid, 5 to 8 parts of dioctyl adipate, 4 to 6 parts of cresyl diphenyl phosphate, 2 to 3 parts of liquid paraffin, 1 to 2 parts of 3-aminopropyltrimethoxysilane, 2 to 3 parts of calcium stearate, 1 to 2 parts of barium stearate, 0.5 to 1.5 parts of anti-aging agents RD and 1 to 2 parts of antioxidants DLTP (dilauryl thiodipropionate). The sound absorbing cotton prepared by the invention has the advantages that the appearance evenness is good, the thickness is uniform, the hand feeling is soft, the product bonding degree is good, the tensile performance is high, the sound absorbing performance is excellent, the flame retardant effect is good, and the like.

The invention relates to two-component superfine fiber material used for heat insulation and sound absorption based on polypropylene superfine fibers and polyester staple fibers and a preparation method thereof, in particular to two-component sound absorption and heat insulation cotton based on the polypropylene superfine fibers and the polyester staple fibers and a preparation method thereof. The material is specially designed for reducing noise power in a high-noise environment, and has the effects of sound absorption and heat insulation particularly in the aspects of automobiles, high speed trains and the like. The material is also suitable for the aspects of pocket-type or plate-and-frame type filters of heating and ventilating systems, household air cleaners and vacuum dust catchers, factory purification and the like. The two-component sound absorption and heat insulation cotton based on the polypropylene superfine fibers and the polyester staple fibers comprises the polypropylene superfine fibers and the polyester staple fibers, wherein the average fineness of the polypropylene superfine fibers is 1-2 micrometers, and the fineness of the polyester staple fibers is 25-35 micrometers. The two-component material formed by mixing of the polypropylene superfine fibers and the polyester staple fibers is processed through electrostatic electrets, and then the two-component sound absorption and heat insulation cotton is formed.

The object of the present invention is to provide a sound absorbing material having a light weight and excellent sound absorbing performance, and a sound absorbing material consisting of a fiber sheet made of fibers containing at least 50% by mass of a porous fiber having many minute pores, each minute pore opening onto the surface of the porous fiber, and having an airflow resistance in the range of between 0.05 and 3.0 kPa·s/m.

The porous fiber having many minute pores, each one opening onto the surface of the porous fiber, has air-permeability, and so a sound absorbing property in itself, and a sheet made of the porous fiber having air-permeability and sound absorbing property has even further sound absorbing properties created by the spaces between the porous fibers, resulting in the sheet becoming a sound absorbing material with extremely great sound absorbing efficiency.

The invention provides metal sandwiched glass with intermediate film which comprises a glass plate, intermediate film having surface gluing material EVA or SGP, a metallic decorative thin panel, an intermediate film of organic gluing material EVA or SGP, and a glass plate. And the secondary rolling production process comprises glass cleaning, hot-air drying, sheet combining, first heating, first rolling precompression, second heating, second rolling precompression, quality inspection, final forming in autoclave, and packaging.

The invention relates to a concrete pavement material for heavy traffic roads and a preparation method thereof. The material is composed of a component A, a component B and a component C in a mass ratio of 1:(0.2-0.6):(4-8). The component A comprises the following components in parts by mass: 40-80 parts of epoxy resin, 0-20 parts of epoxy reactive diluent, 10-50 parts of elastic modifier, 0.2 part of defoaming agent and 0.2 part of dispersing agent. The component B comprises the following components in parts by mass: 100 parts of curing agent, 0-10 parts of curing accelerator and 1 part of coupling agent. The component C comprises the following components in parts by volume: 100 parts of fine stone, 30-300 parts of fine sand, 130-800 parts of waste rubber particle, 50-100 parts of waste rubber powder and 10-20 parts of crystal whisker. Compared with the prior art, the concrete pavement material for heavy traffic roads has the advantages of high strength, favorable durability, favorable roadability, energy saving, environment friendliness and the like, and is convenient for construction.

The invention relates to a preparation method for non-woven fabric and a non-woven fabric production device used for performing the method. The method comprises enabling melt-blown fiber formed through a melt-blown device to have high voltage static electricity, mixing the melt-blown fiber with the high voltage static electricity with artificial short fiber, obtaining composite fiber, collecting the composite fiber and forming the non-woven fabric. The non-woven fabric prepared through the non-woven fabric production device and according to the preparation method for the non-woven fabric is low in density so that the non-woven fabric has improved sound absorption and insulation effects.

The invention discloses a sounding device and an installation method thereof. The sounding device comprises a casing, a cover plate, an accommodation space, a single sounder unit, a sound absorbing material and an isolation net, wherein the cover plate covers the casing, the accommodation space is formed by the casing and the cover plate, the single sounder unit and the sound absorbing material are accommodated in the accommodation space, and the isolation net is accommodated in the accommodation space. The isolation net divides the accommodation space into a front cavity and a rear cavity ventilated with the front cavity, the single sounder unit is accommodated in the front cavity, and the sound absorbing material is accommodated in the rear cavity. The cover plate comprises a front cover plate body which covers the front cavity and a rear cover plate body which covers the rear cavity. The installation method comprises the following steps that the single sounder body is accommodated in the front cavity; the front cover plate body covers the front cavity body; the isolation net is placed between the front cavity and the rear cavity; the sound absorbing material is mounted in the rear cavity; the rear cover plate body covers the rear cavity; and the front and rear cover plate bodies are sealed with the casing to form the sounding device. Thus, assembling is convenient.

This invention relates to a tire-rim assembly which is easily produced at low cost, excellent in durability and capable of notably reducing road noise, and more particularly to a tire-rim assembly comprising a pneumatic tire (1), a rim (2) and a sponge member (4) disposed in a tire internal cavity (3) defined by the pneumatic tire (1) and the rim (2), characterized in that the sponge member (4) has a specific gravity of higher than 0.06 but not higher than 0.25 and/or an air permeability of not higher than 5 cc/cm²/sec.

The invention discloses montmorillonite/isotactic polypropylene/polylactic acid composite sound absorbing cotton, which consists of a top surface layer, a back surface layer and a fiber cotton layer, wherein the fiber cotton layer is clamped and arranged between the top surface layer and the back surface layer, and the top surface layer and the back surface layer are made of non-woven fabric materials. The montmorillonite/isotactic polypropylene/polylactic acid composite sound absorbing cotton is characterized in that the non-woven fabric is prepared form the following ingredients in parts by weight by a melt blowing method: 100 parts of isotactic polypropylene, 10 to 12 parts of polylactic acid, 10 to 12 parts of montmorillonite powder, 5 to 7 parts of dilauryl thiodipropionate, 2 to 3 parts of zinc oxide, 12 to 15 parts of diethylene glycol dibenzoate, 4 to 6 parts of triethyl citrate, 2 to 3 parts of zinc chloride, 5 to 7 parts of chitosan, 2 to 3 parts of molecular sieves, 12 to 15 parts of yellow cinnamon leaf, 2 to 3 parts of rhizoma gastrodiae, 2 to 3 parts of mint, 2 to 3 parts of radix angelicae pubescentis and 4 to 5 parts of auxiliary agents. The montmorillonite/isotactic polypropylene/polylactic acid composite sound absorbing cotton has the advantages that the montmorillonite, the isotactic polypropylene and the polylactic acid are compounded for preparing the sound absorbing cotton by the melt blowing method, the production process is simple, the raw materials are easy to obtain, the cost is low, and the prepared product has the advantages that the air permeability and the oxygen permeability are good, the tensile strength and the extension degree are high, the sound absorbing effect is obvious, and the like.

The invention provides a zeolite-like lightweight heat preservation and sound insulation board applied to a building outer wall, or wall filling of a nonbearing wall or a building top layer. The board comprises dry powder slurry and lightweight aggregate, wherein the dry powder slurry is a zeolite-like geopolymer formed by the excitation of a composite alkali excitant and comprises the following components in percentage by weight: 70-85 percent of coal ash, 5-15 percent of phosphorus slag, 8-20 percent of composite alkali excitant and 0.1-0.3 percent of anticracking fiber; the lightweight aggregate is EPS (Expandable Polystyrene) granules; and the charge ratio of the dry powder slurry to the lightweight aggregate is (89-95): (5-15). The zeolite-like lightweight heat preservation and soundinsulation board has low volume weight, high compression strength, favorable heat preservation and heat insulation properties and good sound absorption effect on various frequency bands of sound waves. The invention also provides a production method of the zeolite-like lightweight heat preservation and sound insulation board. The method has simple process conditions and is easy to realize.

The invention relates to a sound absorption material preparation method and a sound absorption material. The method comprises the following steps: S1, preparing non-foaming material slurry, and uniformly mixing; S2, forming the non-foaming material slurry by adopting an oil column forming method, and forming wet particles; S3, drying the wet particles to form dry particles; S4, roasting the dry particles to form sound absorption material particles. The method has the characteristics of simplicity in operation and high reliability, and the formed particles are uniform in size, smooth in surface and good in sphericity degree; particles mutually contact one another in a point-to-point manner and are uniformly stacked, and the bed-process resistance is small. The invention also provides the sound absorption material. The sound absorption material is prepared from a non-foaming material and is of spherical particles. The sound absorption material has the characteristics of high mass transfer efficiency, good sound absorption effect and uneasiness in dusting when in use.