45results about How to "Guaranteed air permeability" patented technology

The invention relates to a powder filtering system which is used for sucking and filtering powder flying when a three-dimensional molding mechanism operates. The powder filtering system comprises a casing, a powder filtering element, a recovery construction member and an air sucking device, wherein the casing is provided with a sucking port, a first space and a second space communicated with the first space, and the sucking port is connected with the space. The powder filtering element is arranged in the first space and provided with a self cleaning assembly, the recovery construction member is arranged in the second space, the air sucking device is communicated with the first space to enable the first space to form a negative pressure state and produce sucking force to lead powder sucked form the sucking port in the second space, then the powder is transmitted to the powder filtering element to filter and block, and the self cleaning assembly can shake the powder adhered to the powder filtering element to recover the blocked powder to the recovery construction member.

The invention provides a preparation method of a disposable surgical protective clothing material. The surgical protective clothing material comprises a first non-woven fabric layer, a second non-woven fabric layer and a breathable film layer, the breathable film layer is arranged between the first non-woven fabric layer and the second non-woven fabric layer, and the first non-woven fabric layer and the breathable film layer are compounded through a first adhesive layer, the breathable film layer and the second non-woven fabric layer are compounded through a second adhesive layer; the first non-woven fabric layer and the second non-woven fabric layer employ same water-repellent non-woven fabrics, the breathable film layer is a polyethylene breathable film, the thickness of the first non-woven fabric layer and the second non-woven fabric layer are same, the thickness of the first adhesive layer and the second adhesive layer are consistent, the gram weight of the first non-woven fabric layer and the second non-woven fabric layer are both 1-1.2 times the gram weight of the breathable film layer, and the gram weight of the first adhesive layer and the second adhesive layer are both 0.1to 0.15 times the gram weight of the breathable film layer. The preparation method includes the following steps: A) raw material purchasing; B) acceptance storage; C) ingredient getting; D) trial manufacture through compounding; E) mass production through compounding; F) cutting and reeling; G) acceptance packing; and H) warehousing and dispatching.

The invention provides a disposable surgical protective clothing material and a preparation method thereof. The surgical protective clothing material includes a non-woven fabric layer 1, a non-woven fabric layer 2 and a breathable film layer, and the breathable film layer is arranged on the non-woven fabric layer 1 and the non-woven fabric layer. Between the second woven fabric layer, the first non-woven fabric layer and the air-permeable film layer are bonded and compounded through the adhesive layer one, and the air-permeable film layer and the second non-woven fabric layer are bonded and compounded through the second adhesive layer; the first non-woven fabric layer and the non-woven fabric layer The second woven fabric layer is the same water-repellent non-woven fabric, the breathable film layer is a polyethylene breathable film, the thickness of the first non-woven fabric layer is the same as that of the second non-woven fabric layer, and the thickness of the first adhesive layer is the same as that of the second adhesive layer. The gram weight of the non-woven fabric layer 1 and the non-woven fabric layer 2 is 1 to 1.2 times the gram weight of the breathable film layer, and the gram weight of the adhesive layer 1 and the adhesive layer 2 is 0.1 times the gram weight of the breathable film layer. ~0.15 times; the preparation method of surgical protective clothing materials includes steps: A) raw material procurement; B) inspection and storage; C) receiving ingredients; D) compound trial production; E) compound mass production; F) slitting and winding; G) Acceptance of packaging; H) storage and delivery.

The invention discloses a smart vent window comprising a window frame, an external window, an electrostatic window body and smart control system. The external window is mounted on the window frame, the electrostatic window body is mounted on the window frame, the smart control system comprises an air detection unit, a control unit and an electric window-opening unit, the air detection device is mounted on the window frame, the electric window-opening unit is connected with the external window, and the air detection device, the electrostatic window body and the electric window-opening device are respectively connected with the control unit. The smart vent window has the advantages of intelligently isolating and absorbing haze in high speed and the like.

The invention discloses a solid and liquid separator for materials. The solid and liquid separator comprises a frame, press plates, filter plates, a push-and-pull locking mechanism, a filter cloth mechanism, a filter cloth regeneration mechanism and a cleaning mechanism which are arranged on the frame, wherein the press plates and the filter plates are arranged on the frame in a sliding way alternately, and are matched to extrude a material, so that solid and liquid of the material can be separated; the push-and-pull locking mechanism is used for locking, pushing away all the press plates and filter plates, so that solid-liquid separation operation can be performed, or the material can be discharged; the filter cloth mechanism is used for separating solid and liquid of the material when the material is extruded; the filter cloth regeneration mechanism is used for washing to regenerate the filter cloth after the material is discharged; the cleaning mechanism is used for cleaning the material attached to the separator after solid and liquid of the material are separated. The solid and liquid separator has the characteristics of reasonable design, high structure strength, convenience in operation, complete solid and liquid separation, high separation efficiency, convenience in cleaning, long service life, log maintenance frequency, high reliability, strong practicality and the like, and is beneficial for greatly increasing production benefit of enterprises.

The invention discloses a preparation method of tobacco sheet paper base made from tobacco stems. Tobacco stems are used as raw materials to prepare paper, including the steps of dipping, refining, beating, and sheeting; the invention changes the traditional technical prejudice and habit of controlling the refining by controlling the current of the refiner, and creatively adopts the control of grinding The pulp grinding disc, the refining gap, the number of refining stages and the refining concentration are realized. The invention systematically optimizes the refining process conditions, adopts two-stage or three-stage refining, the refining concentration is 20%, and the refining gaps of the first stage and the second stage are respectively 0.4mm and 0.20mm. The present invention analyzes the relationship between the refining process and the performance of tobacco stem fibers through overall research, and summarizes the optimal controllable refining conditions, which ensures that the prepared tobacco stem pulp has the longest fiber length and the highest bulk thickness of the paper. The good quality of the reconstituted tobacco leaves is guaranteed, the performance of the paper base of the tobacco sheet is comprehensively improved, and finally a technical basis is provided for improving the quality of the tobacco sheet and the quality of the cigarette.

The invention belongs to the technical field of display screens and particularly relates to an LED transparent display screen. The invention discloses a transparent display unit in an LED transparent display screen. The transparent display unit comprises a power supply assembly and at least one LED transparent lamp panel, wherein the LED transparent lamp panel comprises a plurality of lamp strips which are arranged in parallel, each lamp strip comprises a positive electrode end and a negative electrode end which are oppositely arranged, and the positive electrode ends and the negative electrode ends are linearly arranged; a positive electrode end of one lamp strip and a negative electrode end of the other lamp strip in every two adjacent lamp strips are adjacent and arranged at intervals, and a plurality of lamp beads arranged in a row are arranged at the positions of the adjacent positive electrode ends and the adjacent negative electrode ends of every two adjacent lamp strips. Due to the fact that the positive pole end and the negative pole end, connected with the positive pole lamp base and the negative pole lamp base on each lamp strip respectively, of the LED transparent lamp panel are linearly arranged, and the connecting lines on each lamp strip are also linearly arranged, the circuit of the lamp face is simple, the permeability rate of the LED transparent lamp panel is guaranteed, two paths of signals are formed on the lamp strip, and when one path of signals breaks down, the other signal line is used for replacing work, so reliability of the LED transparent display screen is improved.

The invention belongs to the technical field of batteries, and particularly relates to a battery diaphragm and a preparation method thereof. The battery diaphragm provided by the invention comprises abase film and a PVDF / PMMA composite coating arranged on at least one side face of the base film in a coating manner; and preferably, the battery diaphragm comprises a base film and PVDF / PMMA composite coatings arranged on both sides of the base film in a coating manner. According to the battery diaphragm provided by the invention, a PVDF / PMMA composite coating is obtained by spraying a mixed slurry of PVDF and PMMA on at least one side face of the base film in a spraying manner, and the prepared battery diaphragm has low air permeability value added, has excellent bonding performance, needlepunching strength, tensile strength and heat shrinkage performance, and can improve the rate discharge and cycle performance of the battery.

The invention discloses a haze-isolating window based on static-conducting gauze. The haze-isolating window comprises a window frame, wherein the window frame comprises an inner insulating frame and an outer frame; an ordinary metal net and the static-conducting gauze are arranged in the window frame, a tip end discharge structure is arranged on at least one side of the static-conducting gauze, the metal net and the static-conducting gauze are isolated by the inner insulating frame, the metal net is grounded through a guide wire, and the static-conducting gauze is connected with a negative electrostatic bag generation control device. The haze-isolating window is green, safe and energy-saving and has remote intelligent control and good air breathability and haze isolation effect.

The invention discloses an anti-residue device for a discharging bin of cement grinding equipment in the technical field of cement grinding, comprising a base. A grinding machine is arranged at the top of the base; the right side of the grinding machine communicates with one end of a discharging pipe; the other end of the discharging pipe is connected with a discharging mechanism; and a supporting frame is arranged at the bottom of the discharging mechanism. When a driven gear drives an elastic rod to rotate, an inclined rod at the top of the driven gear drives fan blades to rotate upwards, air can be blown downwards, the blown air can blow off cement falling on the discharging mechanism due to floating, and therefore a motor can work, when the discharging plate is guaranteed to shake off the cement, a driving assembly used for driving the discharging plate to vibrate is guaranteed not to have cement residues, and residue-free discharging of the discharging bin of the cement grinding equipment can be achieved; a filter screen is driven to vibrate through a reset spring, so that the air passing performance of the filter screen is guaranteed; and normal circulation of airflow is guaranteed when blades of a rotating assembly work.

The invention discloses an antibacterial and durable cotton yarn with moisture absorption and quick-drying function, which comprises a first moisture absorption layer, a main thread core, a main moisture absorption cloth and a reinforced moisture absorption cloth, the inner side of the first moisture absorption layer is connected by a first connecting line layer. Base fabric layer, the outside of the main thread core is wrapped with an outer wrapping thread, the main absorbent cloth is provided with a main absorbent cloth warp thread and a main absorbent cloth weft thread, and the main absorbent cloth warp thread and the main absorbent cloth weft thread are provided with a main thread core and an outer wrapping thread. The reinforced hygroscopic cloth is provided with a reinforced hygroscopic cloth warp and a reinforced hygroscopic cloth weft, and the reinforced hygroscopic cloth warp and the reinforced hygroscopic cloth weft are provided with a main thread core and an outer cover wire, and the connection between the main hygroscopic cloth and the reinforced hygroscopic cloth There are intersections and passages. The antibacterial and durable cotton yarn with moisture absorption and quick drying function can effectively ensure the moisture absorption performance of the cotton yarn through the first moisture absorption layer and the second moisture absorption layer, and at the same time, the base fabric layer ensures the ventilation performance, so that the cotton yarn can be dried quickly .

The invention discloses a multi-function anti-haze window based on a metal cellular network. The multi-function anti-haze window based on the metal cellular network comprises a window frame, window screen nets, an electrostatic generator and a master control electrical circuit; the window frame is composed of an insulated inner frame body and an outer frame body; the insulated inner frame body is used for unfolding the window screen nets; the outer frame body is used for being combined with a push and pull slide way of a window screen; the window screen nets are composed of three nets, namely an electric conductive screen net with fringes, a static electricity storage screen net and an insulated screen net in sequence; and the electric conductive screen net with fringes is connected with the negative static electrode of the electrostatic generator. The multi-function anti-haze window based on the metal cellular network has the advantages of energy saving, good anti-haze effect, excellent breathability and the like.