48results about How to "Achieve sound absorption" patented technology

The invention discloses general purpose Portland cement based ultra-light physical foamed concrete which is characterized by being prepared by mixing, forming and maintaining the following components in percentage by weight: 20-70% of general purpose Portland cement, 0-40% of a type A admixture or / and 0-40% of a type B admixture, 0.5-4% of a type C additive, 0.3-2% of a foaming agent, 0-1% of a water reducing agent, 0-4% of fibers and 25-60% of water. The general purpose Portland cement based ultra-light physical foamed concrete disclosed by the invention has the characteristics of ultra-low dry density, low thermal conductivity, relatively high strength, wide raw material source, low cost, simple preparation process, easy maintenance process selection and the like, is suitable to serve as an earthquake-proof and energy-absorbing material, a lightweight cushion course and a catalyst carrier material in a thermal insulation project, a floor heating project and a back filling project, and is particularly suitable for a building exterior wall external thermal insulation system, a roof thermal insulation system, a composite thermal insulation wall body and a buffer energy absorbing system.

The invention relates to a flame-retardant activated carbon fabric and a preparation method thereof. The flame-retardant activated carbon fabric is characterized in that an activated carbon layer, a water-based adhesive film layer and a hot-melt adhesive powder particle layer are sequentially covered on a base material which is subjected to flame-retardant treatment. The preparation method comprises the following steps of: spraying or padding the base material with an environment-friendly water-based flame retardant and drying; serially coating a prepared activated carbon paste and a water-based flame-retardant hot-melt adhesive powder particle paste on the base material, and drying to obtain the final product of flame-retardant activated carbon fabric. During the drying process, the water-based adhesive film layer is formed between the carbon layer and the hot-melt adhesive powder particle layer. The preparation method of the flame-retardant activated carbon fabric is simple and environment-friendly, and the product has good flame retardant property. Owing to the good adsorption property of activated carbon, the fabric can remove formaldehyde, benzene, TVOC and other harmful gases in the air. When the fabric is used, the fabric can be cut freely and laminated thermally. The flame-retardant activated carbon fabric is easy and convenient to use and has a wide application range.

The invention relates to a wideband sound absorption unit plate and belongs to the field of noise reduction by sound absorption. The sound absorption unit plate mainly comprises a sound insulation plate cavity, a resonant thin plate or a resonant thin film, a perforated or micro-perforated plate, an aluminum fiber plate and a shell. The sound absorption unit plate has a layered structure and comprises the aluminum fiber plate, the perforated or micro-perforated plate, the resonant thin plate or the resonant thin film and the sound insulation plate cavity in sequence from the front face to the rear face, and the shell is packaged around the other four faces, except for the front face and the rear face, of the unit plate. The sound absorption unit plate is wide in sound absorption frequency band, and especially the sound absorption effect at the low frequency band is greatly improved. The wideband sound absorption unit plate is simple in structure, low in weight, easy to machine and manufacture, wide in application range and capable of being applied to noise reduction by sound elimination in places of indoor walls, outdoor sound barriers, station platforms, railway lines and the like.

The fireproof sound absorbing decoration board consists of one facing layer and one inorganic base material layer comprising slurry in 14-18 wt% and solid stuffing in 82-86 wt%. It is produced through adding conducting china clay powder, conducting mica powder, and other conducting material and reinforcing fibrous material into inorganic material as the main material; adhering with inorganic adhesive, naturally curing to form special board, and compounding surface decoration material to reach different decoration effects. Technologically, the fireproof sound absorbing decoration board absorbs sound by means of its porous structure to reach certain sound absorbing effect and its slots and holes to form resonant structure and further sound absorbing effect.

The present invention provides a lightweight composite organic heat preservation and sound insulation prefabricated board for fabricated buildings. The lightweight composite organic heat preservationand sound insulation prefabricated board for the fabricated buildings comprises two organic sound absorption boards, a damping silicone rubber layer, two fiber cement pressure plates, wherein the twoorganic sound absorption boards are made of wood organic matter, white rot fungus hyphae and foaming agents; the damping silicone rubber layer is arranged between the two organic sound absorption boards, and is used for being connected with the organic sound absorption boards and cutting off the transmission of a sound wave; and the two pieces of fiber cement pressure plates are arranged on the outside side of the organic sound absorption boards. According to the lightweight composite organic heat preservation and sound insulation prefabricated board for the fabricated buildings, the wood organic matter is decomposed by wood rot fungi to produce dense pores, the covering effect of wood rot fungi hyphae is used, so that the organic sound absorption boards have excellent sound-absorption effect on the basis of meeting the use requirements of strength characteristic. The invention further provides a preparation method for the lightweight composite organic heat preservation and sound insulation prefabricated board for the fabricated buildings, the preparation process is simple, and the production cycle is short.

The invention relates to a flame-retardant activated carbon fabric and a preparation method thereof. The flame-retardant activated carbon fabric is characterized in that an activated carbon layer, a water-based adhesive film layer and a hot-melt adhesive powder particle layer are sequentially covered on a base material which is subjected to flame-retardant treatment. The preparation method comprises the following steps of: spraying or padding the base material with an environment-friendly water-based flame retardant and drying; serially coating a prepared activated carbon paste and a water-based flame-retardant hot-melt adhesive powder particle paste on the base material, and drying to obtain the final product of flame-retardant activated carbon fabric. During the drying process, the water-based adhesive film layer is formed between the carbon layer and the hot-melt adhesive powder particle layer. The preparation method of the flame-retardant activated carbon fabric is simple and environment-friendly, and the product has good flame retardant property. Owing to the good adsorption property of activated carbon, the fabric can remove formaldehyde, benzene, TVOC and other harmful gases in the air. When the fabric is used, the fabric can be cut freely and laminated thermally. The flame-retardant activated carbon fabric is easy and convenient to use and has a wide application range.

The invention relates to a preparation method of a thermal insulation material. The preparation method comprises the following steps that 1, pulverized fuel ash is screened by a 200-mesh screen for usage after cement test grinding; 2, glass powder is screened by a 200-mesh screen for usage after cement test grinding; 3, 5-15 parts of pulverized fly ash, 85-95 parts of glass powder, 2-6 parts of sodium carbonate, 2-8 parts of titanium dioxide powder, 2-4 parts of borax and 30-35 parts of water are stirred evenly, and then slurry is obtained; 4, the slurry is put into a cement mortar test mold, then vibration and compaction are performed on a cement mortar jolt ramming table, then the cement mortar is put into an electrothermal blowing dry box, and drying is performed to form a blank; 5, the blank is put into a high-temperature resistance furnace, and sintering is performed to obtain the thermal insulation material.

Aiming at the problems of current sound absorption materials in aspects of sound absorption performance, mechanical properties, weatherability, practicality, cost and the like, the invention provides a perlite porous sound absorption material for rail traffic and a preparation process method thereof. The material comprises the following raw materials by weight 10-20 parts of perlite, 60-80 parts of portland cement, 3-5 parts of rapid-hardening cement, 1-4 parts of polymer emulsion, 1-1.5 parts of balling agents, 1-2.5 parts of plasticizers, and 25-35 parts of water. The preparation method comprises the following steps: preparing materials; dissolving the balling agent, the polymer emulsion and the plasticizer in water to prepare a solution in reserve; adding the perlite and the solution into a stirrer for stirring; adding the portland cement and the rapid-hardening cement into the stirrer for stirring so as to allow the materials to become an original slurry material with a lot of particles; pouring the original slurry material into a mold, pressing by a pressing plate for molding; performing conserving after molding to obtain a finished product. The sound absorption material of the invention has both strength and sound absorption performance, and has multifrequency sound absorption capability.

The invention relates to a UV transfer printing process for a wall decorative sheet. The process comprises the following steps: (1) processing a substrate; (2) carrying out roller painting on the front surface; (3) carrying out transfer printing; and (4) carrying out film covering. No harmful gas such as formaldehyde and benzene are released in the process, so that the process is green and environment-friendly. By adopting a product with inorganic and fluorocarbon coatings, the anti-ultraviolet property of the product in an application of an exterior wall is improved greatly; the product is smooth in surface and is coated with a special antibacterial coating, so that bacteria are unlikely to breed, and the product shows an excellent antibacterial performance; a panel is high in areal density and has a good sound isolating property, and a cavity is formed in a mounting system to achieve a sound absorbing effect; by adopting a special antistatic coating, the surface of the product has the antistatic function; the cold and hot expansion shrinkage coefficient is small, and the size of the panel is scarcely changed as the temperature changes. The process provided by the invention is good in durability, light in weight, easy to clean, energy-saving and environment-friendly, easy to process, waterproof and excellent in drug resistance.

The invention relates to a track way for rail vehicles. Track way has area between or near rails (4) which are filled up with hollow space possessing a material. The free space produced by means of formwork (6,7) is provided near the rails.

The invention discloses a partition perforated square tube space sound absorber, and relates to the technical field of building material decoration. The partition perforated square tube space sound absorber comprises a keel assembly and a square tube assembly, the keel assembly comprises a keel body, a pair of symmetrical limiting protruding strips are arranged on one side of the keel body, the two limiting protruding strips are close to the two side edges of the keel body respectively, and the two limiting protruding lines are matched with the keel body to form two mounting grooves; and the square tube assembly covers the keel assembly, a pair of opposite connecting plates is arranged on the side, close to the keel assembly, of the square tube assembly, the two connecting plates and the two mounting grooves are mounted in a one-to-one correspondence mode, and at least one gap is formed in the square tube assembly, so that the partition perforated square tube space sound absorber forms a Helmholtz resonator. The partition perforated square tube space sound absorber can realize a good sound absorption effect, and can also avoid pollution to an indoor environment.

The invention relates to high-sound-absorption composite silicone rubber and a preparation method thereof, and belongs to the technical field of rubber. Silicone rubber and butyl rubber are used as raw materials; the high-sound-absorption composite silicon rubber is prepared; molecular chain motion forms in silicone rubber and butyl rubber molecules are various, relaxation time spectral peaks arewide, sound waves with wide frequency bands can be absorbed, when the sound waves enter the surface of the rubber, most part of the sound waves enter the rubber to be transmitted, sound energy is absorbed by the rubber and converted into heat energy to be dissipated, and therefore the sound absorption effect is achieved. The high-sound-absorption composite silicone rubber is prepared by adding themesoporous silica, and the mesoporous silica has a large number of fine pores and can dissipate sound energy consumption, so that part of sound energy is further reduced, and the sound absorption effect of the rubber is improved.

The invention relates to glass fiber heat insulating cotton taking gold copper tailings as a main raw material and a preparation method of the glass fiber heat insulating cotton. The raw materials of the glass fiber heat insulating cotton comprise the following components in percentage by weight: 65-75 percent of gold copper tailings, 15-25 percent of quartz sand, 3-5 percent of sodium borate, 2-5 percent of sodium carbonate and 1-2 percent of titanium dioxide. The raw materials are mixed in proportion to prepare the glass fiber heat insulating cotton through an electric smelting crucible wire drawing method in combination with a jetting method. The density of the glass fiber heat insulating cotton prepared from the gold copper tailings is in a range of 20 to 120 kg / m<3>, the normal-temperature heat conductivity coefficient is in the range of 0.03 to 0.10 W / (K.m), and the glass fiber heat insulating cotton can achieve the effects of sound insulation, sound absorption, heat preservation, moisture resistance and heat insulation, is simple in production process, relatively low in cost and capable of consuming lots of waste tailing materials, can have the effects of changing wastes into valuable materials and protecting the environment, and has high added value of products.

The invention discloses a fireproof thermal insulation material containing calcium silicate and belongs to the technical field of thermal insulation materials. The fireproof thermal insulation material is prepared from tailing sand, glass powder, titanium dioxide powder, borax, inorganic fibers, calcium silicate, quartz sand, titanium dioxide, magnesium chloride, quick lime, an early strength agent, an edible salt solution and water; the tailing sand and the glass powder are both prepared through grinding and sieving by a 200-mesh screen in sequence; the edible salt solution is prepared from edible salt, chitosan, acetic acid and water. The fireproof thermal insulation material is high in strength, resource reuse of waste is realized, preparation cost and cost are reduced while the quality of the thermal insulation material is improved, the preparation process is simple, the application is wide, and the fireproof thermal insulation material has the effects of thermal shield, fire resistance, thermal insulation, cold insulation and sound absorption.

The invention relates to a background wall soft package structure with a batten. The background wall soft package structure with the batten comprises a back plate, a spongy layer, a fabric layer and an H shaped aluminum strip, wherein the H shaped aluminum strip consists of an H shaped aluminum strip inner frame and an H shaped aluminum strip outer frame, the back plate is fixed and clamped by the H shaped aluminum strip inner frame, a fastening glue adhesive tape is arranged on the H shaped aluminum strip outer frame, and the spongy layer is filled between the fabric layer and the H shaped aluminum strip. Magic tapes are respectively arranged on the outer edge of the H shaped aluminum strip and the back of the back plate. The H shaped aluminum strip includes an inner part and an outer part, the inner part of the aluminum strip clamps a flat plate, and the outer part of the aluminum strip fastens the fabrics through the adhesive tape. Due to the fact that nails are not used, fabrics in the outer layer are convenient to detach at any time, and convenient to dismantle and replace. Due to the fact that the magic tapes are arranged on the aluminum strip and the back plate, a soft package can be detach, replaced and cleaned randomly. The magic tapes are pasted with glue.

The invention provides an application of an environment-friendly plate in furniture. The environment-friendly plate made by an MDI (methylene diphenyl diisocyanate) technique is used for manufacturing the furniture, so as to realize zero methanal emission; according to the furniture manufactured by the plate, durability, moisture resistance, flame retardancy and acoustic absorptivity are achieved; and the problems that the plate type furniture containing methanal in the prior art has a very large harm to a human body and raw wood is used as a raw material so as to waste ecological resources damage the ecological environment are solved.

The invention provides a chip mounter with a noise reduction function. The chip mounter comprises a machine box and a machine body, foot brake frames are symmetrically installed at the bottom end of the machine box, a machine door is arranged at the front end of the machine box, door shafts are symmetrically distributed at the left side end of the machine door, first handles are arranged in the middles of the opposite faces of the door shafts, damping springs are symmetrically arranged at the top end of the machine box, the machine body is connected with the top ends of the damping springs, a controllable machine door is installed at the front end of the machine body, and rotary hinges are symmetrically arranged on the side edges of the top end of the controllable machine door. The chip mounter with the noise reduction function is provided with the damping springs, the damping springs and the machine body are vertically distributed, in daily chip mounting operation, the multiple symmetrical damping springs can achieve the beneficial effect of bearing and sharing vibration generated when the machine body operates as much as possible, and the consistency of the vibration frequency of the machine body is guaranteed as much as possible; the machine body is balanced and stable, and meanwhile noise generated during operation of the machine body is reduced.

The invention discloses a drawer type adjustable sound absorbing system capable of realizing automatic control and a control method of the system. The system comprises a casing, sliding rails, a drawer component, connecting pieces, a driving component and a control switch; a cavity is formed in the casing; each sliding rail comprises an outer rail and an inner rail glidingly connected with the outer rail, and the outer rail extends into the cavity from the open end of the cavity; the drawer component comprises a drawer and an inner sound absorbing container, the drawer comprises an accommodating groove and is fixedly connected with the inner rails, and the inner sound absorbing container is fixed in the accommodating groove and is exposed out of or accommodated in the casing; the casing isfixed to a roof by the aid of the connecting pieces; the drawer is driven by the driving component to slide; and the control switch controls starting and stopping of the driving component. Accordingto the scheme, the system can be suspended on the roof, so that the acoustic absorption problem in the vertical direction in a room can be solved effectively; meanwhile, the sound absorption amount can be adjusted through adjustment of the pulling degree of the inner sound absorbing container; and automatic telescoping of the drawer can be realized, and the exposing area of the inner sound absorbing container is convenient to control, so that graded accurate adjustment and control on the sound absorption amount can be realized.

The invention discloses a method for preparing a novel sound absorption composite material. According to the method, ethylene vinyl acetate (EVA), dimethicone and dicumyl peroxide are taken as main raw materials, meanwhile, a polystyrene / ZnO nano composite material is introduced, and a porous sound absorption material which is good in sound absorption capability and high in sound absorption coefficient is prepared under the action of a polymer and an additive. Compared with a conventional sound absorption material, the porous sound absorption material prepared by using the method has pores ofa high porosity in three-dimensional uniform distribution, is high in sound absorption coefficient, is applicable to a wide audio frequency band range, and is excellent in sound absorption.

The invention relates to a method and device for preparing two-component sound-absorbing cotton through electrostatic spinning-dry laying. The method comprises the following steps that 1, 20-80 partsby weight of electrospun nanofibers and 20-100 parts by weight of dry fibers are composited to obtain an electrostatic spinning-dry laying two-component fiber net; 2, after the electrostatic spinning-dry laying two-component fiber net is utilized for cross laying till reaching the needed grams per square meter, post processing is conducted, and a finished sound-absorbing product is obtained. Accordingly, the two-component sound-absorbing cotton is prepared by compositing the electrospun nanofibers and the dry fibers; by means of the electrospun nanofibers of a nanostructure, the bore diameteris smaller, the porosity is larger, fibers close to the nanoscale can generate resonance with sound waves to attenuate energy, sound absorption is facilitated, more stagnant air is contained in sound-absorbing holes, and the thermal insulation property is better.

The invention provides an Internet-controlled automatic closing sound isolating electrical push-and-pull aluminum alloy door and window which comprises a fixed door and window frame, wherein two electrical telescopic rods are fixedly mounted on the top and bottom of the fixed door and window frame, separately, springs are arranged on the outer sides of the two first electrical telescopic rods in asleeving manner, first sound isolating boards are fixedly mounted at one ends of the first electrical telescopic rods, grooves are formed in two sides of the fixed door and window frame, slide blocksare slidably connected in the two grooves, second electrical telescopic rods are fixedly connected to one sides of the slide blocks, the telescopic ends of the second electrical telescopic rods are fixedly connected to one sides of the second sound isolating boards, and cotton sound absorbing grid frames are fixedly mounted on one sides of the sound isolating boards. According to the scheme, as the two first electrical telescopic rods are arranged on the fixed door and window frame, the two first sound isolating boards extrude each other to close, the first sound isolating boards are closed to block outdoor noises timely, and a sealing strip is arranged to seal the two first sound isolating boards, the airtightness is improved, and the sound isolating effect is improved.

The invention relates to an automotive engine firewall with a soundproof and heat-insulation performance. The automotive engine firewall comprises a wallboard which is identical with an automotive engine in shape and made of rubber materials. The automotive engine firewall with the soundproof and heat-insulation performance is characterized in that a polyurethane foaming layer is covered on the outer side of the wallboard. The automotive engine firewall with the soundproof and heat-insulation performance has the advantages of high soundproof and heat insulation performance, wide application range and low manufacturing cost.

The invention provides a concrete solid pile structure and belongs to the technical field of buildings. The problem that the conventional pile body is poor in bearing strength and low in tension stability and does not have heat insulation, sound absorption, flame retardant property and other properties is solved. The concrete solid pile structure comprises a steel reinforcement cage serving as a middle framework and a concrete solid body poured onto the steel reinforcement cage, wherein the concrete solid body comprises cement, gravel, slag, sand, high-calcium fly ash and low-calcium fly ash; a fiber plasterboard is attached to the outer wall of the concrete solid body; and a ratio of waste paper fibers to gypsum in the fiber plasterboard is 15:85-18:82. According to the concrete solid pile structure disclosed by the invention, multiple process control indexes can be realized in the whole foundation pile manufacturing process, and the compressive strength and tension stability of the foundation pile are enhanced by utilizing the characteristics of the high-calcium fly ash; the capacity of AAR is inhibited by utilizing the low-calcium fly ash, and damage of concrete, caused by an alkali-aggregate reaction, can be eliminated; and moreover, according to use of the surface fiber plasterboard, the concrete solid pile structure has the characteristics of heat insulation, sound absorption, flame retardant property, moth resistance, water resistance, moisture resistance and the like.

The invention discloses sound absorption and noise reduction type composite rubber, which is prepared from 100 to 120 parts of ethylene propylene diene monomer, 20 to 40 parts of vulcanized butyl rubber, 15 to 30 parts of mesoporous silicon dioxide, 2 to 8 parts of stearic acid and 0.6 to 0.8 part of azodiisobutyronitrile. Molecular chains in molecules of the ethylene propylene diene monomer and the vulcanized butyl rubber are multiple in motion form and type, wide in relaxation time spectrum peak and capable of absorbing sound waves of a wide frequency band, when the sound waves enter the surface of the rubber, most of the sound waves enter the rubber to be spread, sound energy is absorbed by the rubber and converted into heat energy to be dissipated, and therefore, the sound absorption effect is achieved. Mesoporous silicon dioxide with a large number of fine pores is added into the sound absorption and noise reduction type composite rubber, and sound energy spread in the rubber can be dissipated, so that part of sound energy is further reduced, and the sound absorption effect of the rubber is improved.

The invention discloses an antibacterial and deodorant floor for a bathroom and a preparation method of the antibacterial and deodorant floor, and relates to the field of floors. The antibacterial and deodorant floor for the bathroom, prepared by the invention, is sequentially composed of a wear-resistant layer, a sound absorption layer and a base layer; the wear-resistant layer is prepared by blending epoxy resin and modified polyether amine, the sound absorption layer is composed of phenolic epoxy vinyl resin, polyurethane and modified calcium carbonate, and the base layer is composed of polyvinyl chloride and marble powder. The surface of the wear-resistant layer is provided with a micro-nano structure and has hydrophobic and wear-resistant effects, sepiolite has adsorbability and can adsorb odor in a bathroom, and the deodorization effect is achieved; and in the sound absorption layer, modified calcium carbonate forms a stable cavity in foam after foaming of polyurethane, so that the fracture toughness is improved while the sound absorption effect is achieved.