107results about How to "To achieve sound insulation" patented technology

The invention relates to a building member, in particular to a complex heat-preservation roof and a construction method thereof. The roof comprises a roof truss, EPS boards and waterproof boards, the multiple EPS boards are arranged between purlins of the roof truss, and the waterproof boards are arranged on the EPS boards and the purlins; and the two end surfaces of the roof truss are also provided with the waterproof boards. The construction method is as follows: the EPS boards are arranged on the roof truss, the upper surface of each EPS board and the upper surfaces of the purlins are coplanar; reflecting films are stuck on the upper surfaces of the purlins and the EPS boards; the waterproof boards are assembled on the two sides of the lowest end of the roof truss, and then are paved on the previous layer until the surface of the roof truss is completely paved; a baffle is arranged on the roof truss and is provided with a first bracket, the first bracket is provided with an external pinchplate, and a drain tank is arranged on the first bracket by the external pinchplate; a second bracket is arranged below the first bracket, and a perforated plate is arranged on the second bracket; and the waterproof boards are used to seal the two end surfaces o the roof truss. The invention has the advantages of environment protection, heat preservation, thermal insulation, sound insulation, convenient installation and the like.

The present invention discloses an interpenetrating network wide-temp. band damping adhesion agent, is made of the glue formed from polyurethane prepolymer and polyacrylate copolymer, polyurethane solidifying agent and polyacrylate solidifying agent. Its preparation method includes: (1). synthesizing polyester; (2). synthesizing polyurethane prepolymer; (3). synthesizing polyurethane solidifying agent; (4). synthesizing polyacrylate copolymer; (5). synthesizing polyacrylate solidifying agent; and (6). uniformly mixing polyurethane prepolymer and polyacrylate copolymer to obtain glue. Said invention can forcedly mix the obtained two component adhesive to form the alloy of interpenetrating neetwork polymer, i.e. interpenetrating network wide-temp. band damping adhesion agent which can mave vibration energy.

The invention relates to one kind of coating material and its manufacturing method. The manufacturing method is that: it covers PU fabric layer on the detachable base-paper, after its drying, and then it covers PU bottom layer. After drying, coiling and cooking, it detaches the detachable base-paper off to achieve the PU covering material with colorful texture. In the invention, the surface layer with at least one colorful texture layer and the PU basal layer can be used for covering electronic products, which can increases users' good feeling for electronic products.

The invention relates to a manufacture method of an inner wall plate. A steel wire screen sheet is manufactured for forming a screen frame skeleton. The invention is characterized in that the method also comprises the steps of manufacturing a plate body in layers, and the process of manufacturing the plate body in layers comprises three steps: manufacturing a first concrete surface layer, manufacturing a heat insulation and sound isolation layer and manufacturing a second concrete surface layer. Thereby, the invention has the advantages of thin plate, light weight, high stiffness, no deformation, no crack, high shock resistance, heat insulation, sound isolation, capability of fully utilizing waste materials and simple construction, and the inner wall plate is particularly suitable for being used as an inner separation wall of the building engineering.

The invention discloses an ECC non-dismantling formwork, a concrete beam based on the formwork and a construction method thereof, and belongs to the technical field of building material construction.The ECC non-dismantling formwork comprises a formwork body, the formwork body is made of cement-based composite materials, the outer side surface of the formwork body is a smooth surface, the inner side surface of the formwork body is a smooth surface, a roughened surface, a concave and convex surface or a sand blasting surface rough surface, an enhancement layer is arranged in the formwork body,and the enhancement layer is a steel strand mesh, a fiber mesh, an FRP mesh, an FRP bar or steel bar. The ECC non-dismantling formwork is not dismantled after the formwork concrete is poured, but is used as a part of a concrete structure, load is borne, some special functions, such as heat preservation, heat insulation and increasing the durability of the concrete structure are further achieved, and when the formwork is used for beam fabrication, the advantages that the construction procedures are simplified, operation is simple and convenient, labor conditions are improved, the amount of formwork support and dismantling is saved, and the construction progress is accelerated are achieved.

This invention discloses a multi-medium sound absorption material, which comprises various materials such as rubber-from foam (or called a rubber foaming), rubber granules and / or a fiber medium and pressed into coiled material through the bonding of an adhesive agent. The sound absorption material can be paved between the floor surface and the grounding so as to enhance the sound-absorbing property. The sound absorption material is also flame-retardant and anti-bacteria.

The invention provides an armor plate. The armor plate comprises a bulletproof steel plate, a high molecular polyethylene plate and a buffer layer arranged between the bulletproof steel plate and the high molecular polyethylene plate, wherein the buffer layer is provided with micropores. According to the armor plate, the buffer layer with the micropores is arranged between the bulletproof steel plate and the high molecular polyethylene plate in a clamping way, so that the energy generated by impact can be effectively absorbed, the deformation caused by high-speed crash can be borne, the protection effect is improved; on the other hand, a sound proof effect can be achieved.

The invention relates to a cotton-free non-metallic compound sound barrier and a preparation method thereof. The compound sound barrier is formed by assembling a plurality of barrier single bodies with cavity bodies in an up-down connection mode, each barrier single body is formed by bonding micro-hole rock sound absorbing and insulating boards and groove-shaped cement components, and the cavity bodies are composed of the micro-hole rock sound absorbing and insulating boards and the groove-shaped cement components in an enclosed mode. Production and installation are convenient, connection is conducted without rivets, elegant appearance is achieved, the good sound absorbing property and sound insulating property are achieved, and fire prevention, and weather resistance and durability are achieved. The cotton-free non-metallic compound sound barrier can be widely used in rail way transportation sound insulation, expressway sound insulation, sound insulation of various machines, ceilings, large-sized houses, class rooms and the like. According to the cotton-free non-metallic compound sound barrier and the preparation method thereof, operating humanization and simplification are achieved, maintenance and disassembling are convenient and easy, construction is quick, and manpower and material resources are saved; and meanwhile, the cotton-free non-metallic compound sound barrier can be adaptable to different environment conditions, application prospects are wide, and the cotton-free non-metallic compound sound barrier can be widely used in all industries of the industrial field.

The invention belongs to the technical field of a door, and particularly discloses a door plate sealing mechanism. An installing groove and a baffle plate groove are formed in the door plate; the baffle plate groove is positioned at the bottom of the door plate; a sealing element used for sealing a gap is arranged in the baffle plate groove; when the door is closed, the sealing element seals the gap; when the door is opened, the sealing element does not seal; a sealing unit used for controlling whether the sealing element extends out of the baffle plate groove or not is arranged in the installing groove; a triggering unit triggering the sealing unit to work is arranged on a hinge; when the door plate rotates, the triggering unit starts the sealing unit to work. Compared with the prior art, the door plate sealing mechanism has the advantages that the triggering unit starts the work of the sealing unit through the door plate rotation, so that the goal of sealing the gap by the sealing element is achieved; the condition that when the door plate is in a closed state, the sealing element completely seals the gap is ensured; cold air is prevented from entering a room; the heat insulation effect is achieved; meanwhile, after the gap is completely sealed, the sound is prevented from entering the room through passing through the door plate; the sound isolation effect is achieved.

The invention discloses sound insulation glass. The sound insulation glass comprises a glass substrate and a plurality of resonator units, wherein the glass substrate is provided with a hollow cavity,and the plurality of resonator units are dispersed in the hollow cavity and form a photonic crystal with the glass substrate. When the sound insulation glass is applied to glass decoration, the technical scheme of the invention can improve the isolation effect of the glass decoration on low-frequency noise and meet the user requirements.

Air brick masonry device comprises a plurality of hole filling teeth, hole filling tooth connecting plates and a handle. A plurality of hole filling teeth are arranged at equal interval, the rear ends of the hole filling teeth are fixedly connected with the hole filling tooth connecting plates, the length of each hole filling tooth is larger than that of a hole of an air brick, the shape and size of each hole filling tooth corresponds to those of the hole of the air brick, and the hole filling tooth can be inserted into the corresponding hole of the air brick. The handle forms by vertically connecting a stand pipe and a hand shank, and the lower end of the stand pipe is connected with the middle part of the hole filling tooth connecting plate. The hole filling tooth, the hole filling tooth connecting plate and the hand shank are all hollow aluminum templates, so as to reduce the whole weight of the air brick masonry device substantially. The air brick masonry device of the invention is simple and convenient to use, and is easy to produce, and the masonry problem of coal gangue (shale) sintering air brick is solved. The invention can be used as a professional masonry tool for filling non-bearing wall for energy-saving construction of the coal gangue (shale) sintering air brick.

The invention provides a method for preparing a microcapsule emulsion used for a novel heat-preserving and sound-insulating building coating. The method comprises the following steps: under proper pressure, overflowing the gas or greenhouse gas with good heat insulation performance into water solution containing emulsifying agent naturally through an orifice, and mixing the solution so as to form round bubbles uniformly; and subsequently adopting an emulsion polycondensation technology to lead a wall material to form a capsule by polycondensation, thus preparing the microcapsule emulsion used for the coating. The invention also discloses a microcapsule emulsion used for the novel heat-preserving and heat-insulating building coating. The invention has heat preservation, sound insulation and energy-saving performances, meets the environmental protection requirement, has good smoothness and large viscosity, is economical, has large market potential and convenient construction and is more comfortable for living.

The invention discloses a capsule-type heating device for floor heating. The capsule-type heating device for floor heating is applied to a floor heating track and comprises a plurality of capsule heating units. Each capsule heating unit comprises a shell. A noise elimination mechanism is arranged outside each shell, low-temperature heat-emitting oil used for heating is arranged in each shell, andeach shell is further internally provided with a first magnetic device and a second magnetic device. When the multiple capsule heating units travel into the floor heating track, the capsule heating units are arranged in a polarity rejecting mode, that is, when the tails of the first capsule heating units and the heads of the second capsule heating units are adjacently arranged, the magnetic polesof the tails of the first capsule heating units and the magnetic poles of the heads of the second capsule heating units are opposite. The capsule-type heating device for floor heating is easy and convenient to mount and is innovatively invented.

The invention discloses anti-radiation aerated concrete containing lead and zinc tailings. The anti-radiation aerated concrete is prepared from, by mass percentage, 5-20% of lead and zinc tailings, 5-15% of cement, 10-40% of fine sand, 10-40% of fly ash, 10-20% of quicklime, 1-5% of gypsum and 0.05-0.10% of aluminum powder paste. Accordingly, high added-value utilization of the lead and zinc tailings can be achieved, the production cost is lowered, and the anti-radiation property of the aerated concrete is improved.

The invention relates to a high-pressure oil pump mounting seat with a sound insulation structure. A mounting seat body comprises a high-pressure oil pump cam chamber, a first flange, a supporting component and a second flange, four first bolt holes are formed in the first flange, and two second bolt holes are formed in the second flange. The high-pressure oil pump mounting seat is characterized by further comprising a sound insulation box and a sealing cover, wherein the sound insulation box is connected with the second flange of the mounting seat body, the sealing cover is connected with the sound insulation box, and three open groove structures are arranged on the side wall of the sound insulation box. Three vertical sealing baffle plates are arranged at the edge of the sealing cover and matched with the three open groove structures on the side wall of the sound insulation box in a one-to-one corresponding manner respectively. A noise spreading route generated in operation of a high-pressure oil pump can be remarkably reduced, and the NVH (noise vibration and harshness) performance of an engine is improved.

The invention provides a manufacturing method of a sound insulation baffle plate, the sound insulation baffle plate and a high-speed train. The method comprises the following steps: step (1) cleaning: performing cleaning treatment on a baffle plate sectional material; step (2) pre-spraying coating: spraying sound insulation damping coating on the surface of the baffle plate sectional material treated in the step (1) so as to form a sound insulation coating layer with the thickness of 40-50 microns on the surface of the baffle plate sectional material; step (3) pre-drying: performing drying treatment on the sound insulation coating layer of the baffle plate sectional material treated in the step (2); step (4) spraying coating: continuously spraying the sound insulation damping coating on the baffle plate sectional material dried in the step (3) so as to further form a sound insulation coating layer with the thickness of 200-300 microns on the surface of the baffle plate sectional material; step (5) drying: performing the drying treatment on the sound insulation coating layer on the baffle plate treated in the step (4); and step 6) sequentially repeating the step (4), namely spraying the coating, and the step 5), namely drying, till the thickness value of the sound insulation coating layer on the baffle plate sectional material is in the range of 2.5-3.5mm so as to form the sound insulation baffle plate.

The invention discloses a flame-retardant and sound-insulating composite curtain wall, and relates to the field of composite wood. The composite curtain wall comprises an aluminum plate outer frame, aPET / PVC flame-retardant composite layer, a titanium powder layer and a ceramic layer. The upper end and the sides of the PET / PVC flame-retardant composite layer are bonded to the inner surface of thealuminum plate outer frame through an organic adhesive. The lower end of the PET / PVC flame-retardant composite layer is sprayed with the titanium powder layer. The ceramic layer is thermally sprayedon the titanium powder layer. A layer of polyurethane primer is evenly sprayed on the upper end of the aluminum plate outer frame. A layer of benzophenone fluorocarbon coating is sprayed on the polyurethane primer. The flame-retardant and sound-insulating composite curtain wall has a simple structure and excellent flame-retardant and sound-insulating properties. The aluminum plate outer frame is coated with the benzophenone fluorocarbon coating, so that the composite curtain wall has good weather resistance and strong UV resistance, the service life of the composite curtain wall is extended, and costs are saved.

The invention provides a stainless steel door and window with sound insulation and noise reduction functions, and relates to the technical field of stainless steel doors and windows. The stainless steel door and window aims to solve the problems that noise is generally transmitted indoors from the edge of a door frame to generate noise, particularly under the condition that the edge of the door frame is poorly sealed, the noise is very serious, and noise elimination at the edge is difficult to consider and the noise elimination effect is poor due to the fact that a conventional door and windowadopts a grouting or honeycomb noise elimination manner for noise elimination. The stainless steel door and window comprises a door frame main body, and end sealing mechanisms are plugged at the upper end and the lower end of the door frame main body respectively. As shaft rods are vertically and fixedly mounted in the middles of the upper end and the lower end of a noise reduction mechanism respectively and rotationally mounted in shaft sleeves, when the noise reduction mechanism generates resonance, a reset mechanism can be driven to move through a gear, and springs at the two ends of the reset mechanism can automatically reset, so that the noise reduction mechanism can carry out gradual reduction in the resonance process, and the purpose of noise reduction is further achieved.

The invention relates to the field of sound insulation walls, in particular to an environment-friendly waterproof sound insulation wall for buildings. The environment-friendly waterproof sound insulation wall comprises a folding mechanism, a lifting mechanism, a push handle mechanism and an air exhaust mechanism; when the environment-friendly waterproof sound insulation wall is unfolded in a folded state, a first bolt and a second bolt are simultaneously unbolted while a support plate is unfolded, the sound insulation wall can be conveniently and rapidly installed on a construction site, a handle is folded in the ascending process of a telescopic plate, the sound insulation range of the sound insulation wall can be wider through ascending of the telescopic plate, the handle is unfolded in the descending process of the telescopic plate, and then the environment-friendly waterproof sound insulation wall can be conveniently carried; in the descending process of the telescopic plate, a movable block rotates downwards to abut against the support plate; in the ascending process of the telescopic plate, a piston is driven to exhaust air in the telescopic plate, so that the interior of the telescopic plate is in a vacuum state, the sound insulation effect is achieved; and the outer wall of the environment-friendly waterproof sound insulation wall is coated with waterproof paint, so that the environment-friendly waterproof sound insulation wall has the waterproof function.

The invention provides a formaldehyde hunting wood door, and relates to the technical field of wood door manufacturing. The formaldehyde hunting wood door comprises a door leaf, a lower door plate and an upper door plate, wherein the upper side and the lower side of the door leaf are respectively provided with the upper door plate and the lower door plate, the door leaf consists of an inner frame and an outer frame, the inner frame is arranged in the outer frame, a foam diatom ooze excess material region is arranged between the inner frame and the outer frame, a foam diatom ooze filling layer is arranged in the inner frame, and a plurality of open holes are formed in the inner frame. The formaldehyde hunting wood door has the advantages that the structure is simple, the design is reasonable, the manufacturing process is simple, and a suit door can achieve air purification, sound isolation and fire prevention effects through change fillings inside the door leaf.

The invention relates to the technical field of glass, in particular to floor building glass. The floor building glass comprises a window frame body, wherein a mounting groove is formed in the right side of the interior of the window frame body, a warm edge spacing strip is welded to the interior of the mounting groove, a hot melt adhesive layer is bonded to the interior of the mounting groove, aglass inner plate and a glass outer plate are bonded to the interior of the hot melt adhesive layer, sound insulation cotton and a transparent silica gel panel are bonded to the interior of a cavity,and a sound insulation layer is arranged in the transparent silica gel panel. According to the floor building glass, the mounting groove is formed in the window frame body to achieve the effect of mounting the glass, the warm edge spacing strip is arranged to achieve the effects of heat preservation and noise reduction, the hot melt adhesive layer is arranged to achieve the effect of bonding and fixing the glass inner plate and the glass outer plate, when the glass is impacted by collision, the transparent silica gel panel can achieve the effect of shock absorption, the problem of glass burstis prevented to a certain extent, and the sound insulation cotton and the sound insulation layer can achieve the sound insulation effect.

The invention relates to an aluminum perforated sound-absorption and insulation plate which comprises a steel post. The middle part of the steel post is a transparent PC (polycarbonate) plate and the upper portion and the lower portion are aluminum perforated plates which are connected with the steel post in a compact mode through a Z-shaped spring fastener. The aluminum perforated plate comprises an aluminum perforated panel,glass cottons and a galvanized steel rear panel with a V shape. The connection part of the upper and the lower of a frame composed of the aluminum perforated panel and the galvanized steel rear panel with a V shape is an embedded concave and convex groove structure. The aluminum perforated sound-absorbing plate is reasonable in structure, large in strength, light in weight, good in sound-absorbing effect and can save materials.

The invention belongs to the field of electric power auxiliary equipment, and in particular relates to an exterior wall panel with a waterproof structure for a substation. It includes an upper prefabricated slab and a lower prefabricated slab that are set up and down with each other. The bottom of the upper prefabricated slab is provided with a protrusion for inserting into the lower prefabricated slab, and the lower prefabricated slab is provided with a groove for matching the protrusion. The protrusion is in the shape of a trapezoid The bottom of the groove is provided with a drain pipe, and the drain pipe is arranged downward from the inside to the outside. Both the upper and lower prefabricated panels include a base layer in the middle and reinforcement layers on both sides of the base layer. The side of the reinforcement layer is far away from the base layer. A waterproof mortar layer is provided, and the outer surface of the upper prefabricated board and the lower prefabricated board is also provided with an antistatic coating layer. The present invention provides an upper prefabricated board and a lower prefabricated board arranged in cooperation with each other, and utilizes its layered structure and The mutual cooperation structure can effectively achieve the purpose of waterproofing, and at the same time, achieve the purposes of heat preservation, sound insulation, fire prevention, earthquake resistance and antistatic.

The invention discloses an energy-saving environment-friendly composite color steel plate. The energy-saving environment-friendly composite color steel plate comprises a color steel plate, a super-flame retardant crosslinked polyethylene foaming material plate, an iron red phenolic aldehyde anti-rust paint layer and a molybdenum disulfide coating. During production, the super-flame retardant crosslinked polyethylene foaming material plate, the iron red phenolic aldehyde anti-rust paint layer and the molybdenum disulfide coating are sequentially coated on the color steel plate. The energy-saving environment-friendly composite color steel plate disclosed by the invention has the advantages that the energy-saving environment-friendly composite color steel plate utilizes an adhesive-free laminating heat treatment technology and can be tightly adhered with a super-flame retardant crosslinked polyethylene foaming material plate, then the plate is protected by virtue of the iron red phenolicaldehyde anti-rust paint layer and the molybdenum disulfide coating, and the characteristics of thermal insulation, sound insulation, watertightness, prevention of moisture condensation and weather resistance of a building can be achieved only by virtue of a single-layer super-flame retardant crosslinked polyethylene foaming material plate and a single-layer color steel plate.

The invention discloses a silent flame-retardant sliding wooden door, which comprises a wooden door body, and a moving mechanism is symmetrically arranged on the upper and lower sides of the wooden door body; the moving mechanism includes guide rails arranged on both sides of the wooden door body, and There is a T-shaped connecting rod between them, one side of the T-shaped connecting rod is fixed to the wooden door body, and the other side of the T-shaped connecting rod is provided with a silent wheel, and the surface of the silent wheel fits the guide rail; the lower part of the wooden door body is set There is a slider, a nut is arranged inside the slider, a screw is threaded on the nut, the screw is engaged with the nut, and a motor is provided at the end of the screw; the wooden door body includes a base plate a and a base plate b arranged in parallel, and the base plate A flame retardant layer a is set between a and base b, and a sound insulation layer is set between flame retardant layer a and base b; both base a and base b are equipped with a flame retardant layer b, and the outermost side of the wooden door body is provided with a decorative Floor. The invention has the advantages of convenient switch, noise reduction and good flame retardancy.

The invention discloses multifunctional wallpaper and a preparing method and application thereof. The multifunctional wallpaper comprises a bottom coating and a surface layer. The bottom coating comprises, by weight, 90-110 parts of acrylic emulsion of which the solid content is 35% and 1-20 parts of graphene. The surface layer comprises, by weight, 20-50 parts of white cement, 1-10 parts of gypsum, 5-20 parts of mica powder, 3-20 parts of hollow microbeads, 5-30 parts of glass microbeads, 30-50 parts of quartz powder, 0.1-2 parts of cellulose, 0.1-2.0 parts of water reducing agent, 0.1-1.5 parts of wetting agent, 0.1-2.5 parts of calcium formate, 0.3-3.0 parts of anti-cracking fiber, 2-20 parts of emulsion powder, 0.5-10 parts of far infrared ceramic powder and 0.5-15 parts of hydrophobicSiO2 aerogel. The multifunctional wallpaper can be applied to concrete floors, metal roof surfaces, building outer walls and inner walls, and has the effects of thermal insulation, water resistance,heat preservation and rust resistance.

The invention belongs to the field of special glassmaterial processing and production, and relates to an orderly and densely arranged microcavity structure membrane vacuum glass, which comprises a microcavity glass plate. One layer or two layers of densely arranged microspheres are arranged in the glass plate; a layer of thin film is arranged on the surface of each microsphere; a microcavity exists between every two adjacent microspheres densely arranged in each layer or between two layers. According to the novel orderly vacuum optical microcavity glass provided by the invention, sunshine in a visible region spectral region is allowed to penetrate through, lighting power is saved, a spherical shell thin film can obstruct infrared radiation, and a vacuum microcavity has effects of insulating cold, heat and sound; the glass can split beams in multiple colors selectively, so that the light reflection can be reduced; the glass has the advantages of fog resistance and frosting resistance; the glass has a curtain function, is unviewable from outdoor to indoor, and is visible from indoor to outdoor; the glass comprises the main materials: glass and a metal frame, and is applicable to a large standard modularized building material brick in the future, and convenient to build and install the whole wall body.

The invention discloses a shock absorption and noise reduction steel structure beam-column steel net wall construction process. By the adoption of the construction process, reliable force transmission of a steel structure beam column can be achieved, structural stress is simple and definite, the requirement for strength and seismic performance is met, and construction is convenient; material consumption for construction is reduced, the load on a steel body is reduced, and supporting and connection are achieved; a cement adhesion net is arranged on a steel column and a steel beam, it is guaranteed that the cement adhesion net can be well connected with the steel column and the steel beam and certain gaps exist between the cement adhesion net and the steel column and the steel beam, better adhesion of composite cement mortar is ensured, and the supporting capacity and seismic performance of composite cement mortar are improved; composite cement mortar is applied twice, so that the solidification capacity and adhesion force between cement and the steel column, the steel beam and a steel grid wall are improved; due to the adoption of the steel grid wall, sound insulation is achieved, hollow heat insulation is achieved, pipelines can be laid in the hollow wall, line construction can be conducted in the hollow wall, and the problem that construction of a pure steel structure is difficult and complicated is solved; the seismic performance and fire resistance of a steel structure and the sound and heat insulation property of cement are combined.

The invention provides a method for preparing a microcapsule adhesive used for novel heat-preserving and sound-insulating building coating. The method comprises the following steps: under proper pressure, overflowing the gas or greenhouse gas with good heat insulation performance into water solution containing emulsifying agent naturally through an orifice, and mixing the solution so as to form round bubbles uniformly; and subsequently adopting an emulsion polycondensation technology to lead the melamine wall material to form a capsule by polycondensation, thus preparing the microcapsule adhesive used for the coating. The invention also discloses a microcapsule adhesive used for the novel heat-preserving and heat-insulating building coating. The invention has heat preservation, sound insulation and energy-saving performances, meets the environmental protection requirement, has good smoothness and large viscosity, is economical and has large market potential.