47 results about "Cotton gauze" patented technology

The invention discloses a flexible and stable three-layer porous structure hemostatic dressing and a preparation method thereof, and belongs to the technical field of biological medicine. The preparation method of the hemostatic dressing comprises the following steps: constructing a stable foaming system by using protein and polysaccharide, constructing a dual three-dimensional network by combining multi-source polysaccharide and tannic acid, and designing a large-area dressing structure by overlapping the dual three-dimensional network with cotton gauze; carrying out Ca < 2 + > cross-linking impregnation and freeze drying in a weak acid environment to prepare an integrally formed three-layer dual-network multi-source porous structure dressing; the dressing has three layers of different structures, has an extremely fast hemostatic effect, reduces the amount of bleeding, can effectively maintain the humidity of a wound, avoids invasion and infection of bacteria, and can quickly and effectively sterilize; good shape maintaining and recovering capability is realized; meanwhile, the advantages of the porous structure and the cotton gauze are integrated, the structure is enriched, the structural stability of the large-area dressing is improved, the dressing can be stored for a long time in a normal-temperature environment, and the physical basic performance of the dressing meets the requirements of medical dressings.

The invention discloses an energy-saving and environment-friendly cotton yarn spinning and carding device which comprises a lathe and is characterized in that the lathe is connected with a cotton yarn moving speed adjusting assembly, and the cotton yarn moving speed adjusting assembly is used for outputting cotton yarn and adjusting the output speed of the cotton yarn; the cotton yarn moving speed adjusting assembly comprises a cylinder, a square opening formed in the arc-shaped wall face of the cylinder, a first motor, a cotton yarn moving speed adjusting rod, a disc, a limiting ring, a rotating rod, a second electric push rod, a convex shaft, a rotating disc and an inclined sliding groove, and the two ends of the cylinder are rotationally connected with one ends of the two sides of the lathe correspondingly; the square openings are evenly distributed in the arc-shaped wall face of the cylinder in the circumferential direction, and each square opening is provided with the cotton yarn moving speed adjusting rod. The invention relates to the technical field of spinning carding equipment, in particular to an energy-saving and environment-friendly cotton yarn spinning carding device to solve the problems that in the prior art, static electricity of cotton yarn cannot be removed, and the output speed of the cotton yarn cannot be automatically adjusted.

The invention discloses a production method of a sweat-absorbent towel with a temperature monitoring function, and relates to the technical field of sweat-absorbent towels and selection and design of carriers. All-cotton gauze verified through experiments is selected, the thickness of the gauze is 3-4 layers, and the balance of the water absorption rate and the water retention rate is ensured; in order to increase the durability of the gauze, a layer of hydrophobic fibers is compounded on the outer surface of the gauze, and the sweat-absorbent towel can be obtained; preparing an indicator solution and preparing a bromocresol green solution; the concentration of the solution is controlled to be 0.4 mg / mL; preparing a sodium alginate solution, respectively taking 50ml of the bromocresol green solution and 50ml of the sodium alginate solution, namely mixing and uniformly stirring according to a volume ratio of 1: 1 to form a mixed solution; the mixed solution of the bromocresol green solution and the sodium alginate solution is adopted, the buffer solution is added to serve as the indicator, the bromocresol green solution is stable and rich in color, the bromocresol green solution turns blue from dark green after meeting water, the bromocresol green solution is an ideal color indicator, and the indication effect is improved.

The utility model discloses a spice extraction device for spice processing, and belongs to the technical field of spice processing. Comprising a perfume liquid extraction device, the perfume liquid extraction device comprises a base plate, a carrying plate is arranged at the top end of the base plate, and an extraction cylinder is arranged in the carrying plate. Through arrangement of the extraction cylinder, a filter cylinder, an embedded rod, a limiting block and a threaded rod, a bevel gear is driven to rotate through starting of a driving motor, and the bevel gear drives a bevel gear ring to drive the extraction cylinder to rotate; through the arrangement of the filter cartridge, an extracting solution is rapidly thrown out of filter holes in the filter cartridge to the bottom of the extracting cartridge to be collected through centrifugal force in the filter cartridge, a cotton gauze element reduces blockage on one hand, improves the filtering precision on the other hand, filter residues can be directly packaged after filtering is completed, and after the filter cartridge is used, an embedded rod and a limiting block can be separated by rotating a threaded rod, so that the filtering efficiency is improved. The filter cartridge is independently cleaned, so that the next filtering is facilitated, and the service life of the filter cartridge is prolonged.

An oral surgical retraction article comprises a polyester or polyether polyurethane foam sponge, or a combination thereof, that is sterilizable and has a porosity between not less than 45 pores per inch (ppi) and not more than 105 ppi and configured in size and shape for retracting a gingival flap during an oral surgery.

A reusable air filter and methods are provided for filtering air being conducted to an air intake of an internal combustion engine. The reusable air filter comprises a filter medium configured to pass an airstream and entrap particulates flowing within the airstream. The filter medium is comprised of cotton gauze disposed in a sinusoidal arrangement that provides a filtration surface area that is larger than a perimeter area of the filter medium. An end cap and base may be configured to retain the filter medium therebetween. The base provides an interface between the air filter and an air inlet of the engine. The filter medium may be disposed in a flat, panel shape that is bordered by a supportive tray. Support rods may be embedded within the tray to prevent bowing of the tray due to air pressure when coupled with an air box of the engine.

The invention discloses an intelligent moxibustion device with a fireproof function, and particularly relates to the technical field of moxibustion device.The intelligent moxibustion device comprises a box body and two moxa sticks, the bottom end of the box body is in an arc shape and better fits the curve of the human body, the bottom ends of the moxa sticks are located in the box body, the bottom ends of the moxa sticks are ignited during use, and an isolation assembly is arranged on the inner wall of the box body; the isolation assembly comprises an iron isolation net fixed to the inner wall of the box body, cotton gauze is arranged at the top end of the iron isolation net, and a sponge block is placed at the top end of the cotton gauze. A layer of cotton gauze is laid at the top end of the iron isolation net, the cotton gauze is kept in a wet state in the moxibustion process through water drops dripping from the dripping nozzle, ash falling from the combustion end of a moxa stick falls on the cotton gauze, and therefore the ash is wetted, sparks possibly existing in the ash are extinguished, and the moxibustion effect is improved. Scalds or fire disasters caused by unextinguished sparks in ash are avoided, and the fireproof performance of the moxibustion device is effectively improved.

A sweat-isolating towel for children comprises a sweat-isolating towel body and a lapping piece which are integrally formed, the sweat-isolating towel body is of a rectangular structure, four corners of the sweat-isolating towel body are round corners, a connecting neck is arranged at the bottom of the lapping piece, the connecting neck is connected with the top of the sweat-isolating towel body, the connecting neck is of a rectangular structure, and the width of the connecting neck is smaller than that of the sweat-isolating towel body; the sweat-isolating towel body comprises an antibacterial base cloth layer and a sweat-isolating layer, wherein the antibacterial base cloth layer is made of chitin fiber antibacterial blended cloth; the upper knitted fabric layer a is arranged on the upper surface of the antibacterial base fabric layer; the upper pure cotton gauze layer a is arranged on the upper surface of the upper knitted fabric layer a; the lower knitted fabric layer b is arranged on the lower surface of the antibacterial base fabric layer; the lower pure cotton gauze layer b is arranged on the lower surface of the lower knitted fabric layer b. The infant sweat-isolating towel can simultaneously meet the functions of softness, strong sweat absorption, air permeability, antibiosis and no irritation to the skin, and can better protect the skin of an infant.

The invention relates to the technical field of building materials, and discloses a preparation method of superfine sand concrete, which is characterized by comprising the following steps: compounding large-particle-size ferronickel slag with superfine sand; the method comprises the following steps: grinding small-particle-size ferronickel slag sand into powder, soaking in a tartaric acid solution, adjusting the pH value by sodium hydroxide, carbonizing, curing, adding carbonate, and grinding together until the specific surface area is greater than 300m < 2 > / kg; and a layer of pre-wetting cotton gauze is laid in the concrete every 3-5 cm, and the problems of stability of the ferronickel slag sand concrete and large shrinkage of the super-fine sand concrete are solved.

The utility model relates to a cotton yarn strip cutting device for all-cotton yarn-dyed fabric, and belongs to the technical field of all-cotton yarn-dyed fabric production.The cotton yarn strip cutting device comprises a cutting table, narrow plates are fixed to the front end and the rear end of the top end of the cutting table, three supports are arranged at the top end of the cutting table, and pressing and fixing structures are arranged on the inner sides of the left support and the right support; a cutting knife is arranged on the inner side of the middle support, a hydraulic rod is fixed to the top end of the cutting knife, and adjusting assemblies are arranged at the front end and the rear end of the middle support. The adjusting assembly comprises a measuring meter. According to the cotton yarn strip cutting device for the all-cotton yarn dyed fabric, by arranging the adjusting assembly, the position, located on the cutting table, of the cutting knife can be adjusted so that the distance between the cutting knife and the left support and the distance between the cutting knife and the right support can be adjusted according to the cutting length of cotton yarn, adjustment can be conducted according to needed cotton yarn strips, and the accuracy of the length of the cut cotton yarn can be guaranteed; and the pressing and fixing structure is arranged, so that the phenomenon of burrs at the cutting end caused by unevenness of the cotton yarns can be reduced.

The invention discloses an orange wine production device and a preparation process thereof, and particularly relates to the technical field of orange wine production.The orange wine production device comprises two bottom frames, a hydraulic cylinder is installed in the center of the top of each vertical frame, an extrusion device is installed at the bottom of a piston rod at the output end of each hydraulic cylinder, and annular cotton gauze is arranged in each extrusion device; two spiral rails are jointly installed on the vertical parts of the left side and the right side of the vertical frame, and adjusting devices are installed on the tops of the two spiral rails. According to the orange wine production device and the preparation technology thereof, the annular cotton gauze is adopted as a filtering and extruding carrier, the air permeability is good, fiber gaps are evenly distributed, the number of grids is large, and orange pulp fibers are not prone to being attached and blocked; and meanwhile, the device can gather pulp fibers towards the center instead of being accumulated on a filtering surface under the dual action of'extrusion and rotary twisting ', so that the blocking risk is reduced fundamentally, and the problem that the filtering efficiency is reduced due to blocking is avoided.

The present invention relates to the technical field of dental hemostasis, and discloses a postoperative hemostasis device, including a cotton ball for compressing hemostasis, and also including: a compression soft plate, the cotton ball is adhered to the bottom surface of the plate, the compression soft plate is shaped and changed under the occlusion of the teeth, and is stuck on the teeth to self-press the cotton ball at the hemostasis position; a hook hole is provided at the end of the compression soft plate, and is used to open the compression soft plate. The present invention uses a compression soft plate that can be occluded and shaped to assist the cotton ball in self-compression, and does not require the patient to bite all the time, thereby reducing the psychological pressure of the postoperative occlusion process and improving the patient's hemostasis experience; the ear plates on both sides of the end of the compression soft plate are clamped on the adjacent teeth of the alveolar to be hemostatic, and the compression soft plate is clamped and fixed to achieve the self-fixing effect of the compression soft plate, and the compression structure is stable; a hook hole is provided at the end of the compression soft plate, and the purpose of convenient removal is achieved with the help of the cooperation of the hook hole.

The invention discloses a preparation for wound healing and a preparation method thereof, and belongs to the technical field of postoperative wound management. The preparation for wound healing comprises active pharmaceutical ingredients, auxiliary ingredients and a medical cotton yarn strip, wherein the active pharmaceutical ingredients and the auxiliary ingredients are loaded on the medical cotton yarn strip; the active components of the medicine comprise a purslane extract, a fig extract, a coptis chinensis extract, a honeysuckle extract, a maguey extract, a dendrobium officinale extract and the like; the auxiliary components comprise vaseline and vegetable oil. The active ingredients of the preparation for wound healing are all plant extracts, no chemical medicine is contained, the irritation effect on wounds is avoided, wound infection and bleeding can be effectively avoided, pain is relieved, and meanwhile the wound healing time can be effectively shortened.

The invention discloses a production method of absorbent cotton gauze for surgical antibacterial cotton yarn dressing, which comprises a main support frame, an antibacterial liquid storage tank is mounted on one side of the inner bottom end of the main support frame, and a microwave drying bin is fixedly connected to one side of the top end of the main support frame. And a coating assembly capable of realizing double-sided uniform administration is arranged on the other side of the top end of the main support frame. According to the production method of the absorbent cotton gauze for the surgical antibacterial cotton yarn dressing, a liquid outlet pipe, a metering pump, a nozzle, an upper coating roller and a lower coating roller are arranged, when the absorbent cotton gauze is used, the metering pump pumps out antibacterial liquid through the liquid outlet pipe, and the antibacterial liquid is pumped to a first liquid distribution pipe and a second liquid distribution pipe through a liquid feeding pipe; the nozzles on one side of the first liquid distribution pipe and one side of the second liquid distribution pipe spray fine drugs to the lower coating roller and the upper coating roller respectively, the upper and lower surfaces of the upper and lower coating rollers can be uniformly coated, the function of uniformly feeding the drugs and keeping the concentration stable is realized, and the problem that the device does not have the function of uniformly feeding the drugs and keeping the concentration stable is solved.

The invention relates to the technical field of steam-cured concrete prefabricated parts, and discloses a preparation method of a steam-cured concrete prefabricated part, which comprises the following steps: pre-soaking recycled aggregate and water slag sand, and spraying an inorganic salt solution containing Mg < 2 + >, Al < 3 + > and Fe < 3 + > or a sodium dodecyl benzene sulfonate solution on the recycled aggregate and the water slag sand; a layer of cotton gauze pre-infiltrated by a silane coupling agent, nano silicon dioxide and a nano calcium carbonate solution is paved in every 20-50mm of concrete, and then steam curing and carbonization curing are performed, so that the formation amount of a hydration product calcium hydroxide is reduced, the morphology of the hydration product calcium hydroxide is improved, and the later strength and durability of the steam-cured concrete are improved.

The utility model discloses a multilayer composite antibacterial medical gauze, including storage box, the inside embedded installation of storage box has medical gauze main part, the surface fixed mounting of medical gauze main part has protection structure, the storage box includes sterilization lamp, box body, pivot, handle, baffle, the front surface embedded installation of box body has the pivot, the front surface fixed mounting of pivot has handle, the side surface embedded installation of box body has baffle, the inside of box body is located the embedded installation of sterilization lamp in upper portion, medical gauze main part includes pure cotton gauze layer, bamboo cotton gauze layer, antibacterial gauze layer, sealing layer, the lower surface fixed mounting of pure cotton gauze layer has bamboo cotton gauze layer, the lower surface fixed mounting of bamboo cotton gauze layer has antibacterial gauze layer. A kind of multilayer composite antibacterial medical gauze of the utility model can automatically sterilize gauze when not using, can improve the service life of gauze.

An antibacterial breathable pure cotton gauze towel comprises a gauze body, the top of the gauze body is provided with a supporting part, the supporting part comprises at least one bag body and a supporting strip located in the bag body, the bag body is fixed to the top of the gauze body, one end of the bag body is provided with an opening, the outer side of the opening is provided with a limiting body, and the limiting body is arranged on the outer side of the opening. The supporting strip is located in the bag body and abuts against the limiting body. According to the utility model, the supporting part is additionally arranged, so that the original wrinkled gauze towel can be flatly supported, the towel can be fully aired in the airing process after being cleaned, and the condition of bacterium breeding is reduced; meanwhile, in the using process, the supporting strips made of silica gel cannot affect the unique soft and breathable functions of the gauze towel, and the gauze towel has very high application and popularization value.

The utility model discloses an inflation adjusting type cotton yarn pad which comprises a supporting box and a cotton yarn pad body, the upper surface of the supporting box is connected with a sealing plate, the upper surface of the sealing plate is connected with a connecting ring, the upper surface of the sealing plate is connected with a deflation pipe, an air bag is arranged on the inner wall of the supporting box, and the upper surface of the air bag is communicated with a connecting pipe. The end, away from the air bag, of the connecting pipe communicates with an inflation pump, the bottom face of the supporting box is connected with a set of hemispheres, and the bottom face of the supporting box is connected with a plurality of air pressure blocks. The air pressure in the air bag is adjusted by arranging the deflation pipe and the connecting ring, the pressure applied to a wound can be accurately controlled according to the wound treatment requirement, so that personalized treatment is provided, the uniform distribution of the pressure is ensured by the convex design of the air pressure block and the hemisphere, more effective hemostasis is facilitated, and the wound healing effect is improved. Meanwhile, compression on surrounding tissues is reduced, the pain feeling of a patient is reduced, blood coagulation can be better promoted through uniform and moderate pressure, and the hemostasis effect is improved.

The invention discloses a carbon sequestration deodorization composting functional film and a preparation method thereof. According to the preparation method, a waste jacket fabric is used as a basic material, and a layer of cotton gauze is added between two layers of fabrics of the waste jacket; depositing a mixture of magnesium-aluminum hydrotalcite, a ZIF-8 metal organic framework material, modified silica gel and a zeolite molecular sieve on the surface of the cotton gauze; finally, the fabric is sewn and then placed in a drying oven to be dried, and the compost film with the carbon sequestration and deodorization functions can be obtained. The compost film is excellent in heat preservation, water resistance and air permeability of a compost body; more importantly, greenhouse gases such as carbon dioxide, methane and carbon monoxide and malodorous gases such as ammonia gas discharged in the composting process can be effectively fixed; in addition, the compost film can also retain nitrogen in the compost fertilizer, the fertilizer efficiency of the fertilizer is remarkably improved, and the yield of crops is further improved. The preparation method is simple and convenient, low in cost and wide in application prospect.

The utility model relates to the technical field of medical supplies, in particular to a PICC (Peripherally Inserted Central Catheter) universal protective sleeve which comprises a wear-resistant nylon sheath, a through visible puncture opening is formed in the front part of the outer surface of the wear-resistant nylon sheath, and a waterproof polyurethane coating is coated on the inner wall of the wear-resistant nylon sheath. The inner wall of the waterproof polyurethane coating is fixedly connected with a skin-friendly cotton gauze inner sleeve layer, the inner wall of the skin-friendly cotton gauze inner sleeve layer is coated with an antibacterial silver ion fiber layer, the front portion of the outer surface of the wear-resistant nylon sheath is fixedly connected with an outer hard hook-and-loop fastener, and the visual puncture opening is located on the inner side of the outer hard hook-and-loop fastener. The PICC universal protective sleeve has the advantages that the PICC universal protective sleeve is provided with an adjustable fixing structure which can be adaptive to limbs with different thicknesses and can be stably fixed, the conditions of a catheter and a puncture part can be conveniently observed by the aid of a visual operation component, the internal multi-layer protective structure has the advantages of waterproofness, skin friendliness, antibiosis and the like, and the PICC universal protective sleeve can comprehensively guarantee the use safety of the PICC and the comfort level of a patient.

The utility model discloses a tight and anti-deformation cotton yarn length measuring device which comprises an installation frame, a length measuring wheel is installed on the top of the installation frame, a fixing plate is fixedly connected to the outer wall of the installation frame, and a first servo motor is fixedly connected to the outer wall of the fixing plate. The cotton yarn length measuring device relates to the technical field of cotton yarn length measurement, through cooperation of the supporting wheel, the tensioning wheel and the rack, when a cotton thread is measured, the cotton thread is placed on the supporting wheel, the rack is driven to ascend and descend through rotation of the gear, the cotton thread is pressed by the tensioning wheel, the cotton thread is more convenient to wind and measure subsequently, and the measuring efficiency is improved. The problem that in the prior art, when the cotton thread measuring device is used, due to the fact that the cotton thread has the tension degree, the cotton thread is prone to being wound together in the measuring process, and the working efficiency is reduced is solved.

A manufacturing method of all-cotton gauze comprises the steps that fabric design is conducted, specifically, a double-layer or multi-layer gauze structure is selected, hanging point structures are arranged between the layer structures of gauze, and the gauze is woven through pure cotton yarn; air vortex spinning is adopted, the feeding ratio ranges from 0.94 to 0.97, the spinning speed ranges from 350 m / min to 400 m / min, and the fibers which are opened to be in a single state are coagulated and twisted into plied yarn; the difference between the warp yarn density and the weft yarn density does not exceed 5%, and the hanging point structures between the gauze layer structures are rhombus-shaped; carrying out after-treatment: carrying out physical softening treatment on the gauze through air flapping; and finished product detection: inspecting the appearance quality and internal quality indexes of the gauze. Through the technologies of density balance, rhombus hanging points, vortex plied yarn, air flapping and the like, the slip value is greatly reduced, the hand feeling and the washability are synchronously improved, and meanwhile the essential characteristics of breathability, lightness and thinness of the gauze are maintained.

The application discloses an anti-aging and corrosion-resistant graphene cable, which comprises a conductor bundle, an insulation layer 1, a cotton gauze layer, a graphene layer, an insulation layer 2 and a sheath from inside to outside. Compared with the prior art, the graphene cable prepared by the application can provide excellent oxidation resistance and anti-aging performance, prolong the service life of the cable, and has excellent corrosion resistance and wear resistance, so that the graphene cable has outstanding performance in terms of power transmission, heat dissipation and mechanical protection.

The invention discloses an active cooling mask, comprising a mask body (1), a fixed ear rope (2), a nose pressing strip (3), a functional area (4) and a release area (5), wherein the mask body is provided with an absorbent cotton gauze layer (6), a phase change cold storage layer (7), an active cooling layer (8), an ultrafine polypropylene fiber melt-blown material layer (9), a heat insulation layer (10) and a non-woven fabric layer (11) in sequence from the inside to the outside. The active cooling mask disclosed in the invention can effectively cool down and reduce the wearer's facial temperature, and breathe smoothly. At the same time, the matching design of phase change cold storage and dissolved heat absorption refrigeration can effectively extend the cooling time. Moreover, the invention does not rely on cold sources such as refrigerators and ice cubes, but only needs to absorb heat through the combination of materials to provide a cold source. It is ready to use and easy to use, which greatly increases the practicality of the invention.

The invention provides a nasopharynx breather pipe, and relates to the technical field of nasopharynx breather pipes. The nasopharynx breather pipe comprises a nasopharynx breather pipe body, a rubber ball, a spherical cover, a first micropore, an arc-shaped baffle, a second micropore, a memory alloy plate and pure cotton gauze, the rubber ball is arranged outside the nasopharynx breather pipe body, the spherical cover is arranged outside the rubber ball, the pure cotton gauze is arranged outside the spherical cover, the first micropore is formed in the side wall of the spherical cover, and the arc-shaped baffle is arranged on the inner wall of the spherical cover. The memory alloy plate is connected with the arc-shaped baffle, the rubber ball and the spherical cover are used for storing liquid medicine, the rubber ball expands or contracts to discharge the liquid medicine outwards or absorb the liquid medicine inwards, and the memory alloy plate is straightened or bent to drive the first micropores and the second micropores to be communicated or staggered. Local heating and swelling are caused by inflammation in the nasal cavity of a patient, the rubber ball is heated and expanded to drive liquid medicine to be discharged, the pure cotton gauze is extruded to evenly coat the liquid medicine, and the liquid medicine is conveniently discharged or supplemented through deformation of the memory alloy plate.

This invention provides a nasopharyngeal airway, relating to the field of nasopharyngeal airway technology. The nasopharyngeal airway includes a nasopharyngeal airway body, a rubber bulb, a spherical cover, a first micropore, an arc-shaped baffle, a second micropore, a shape memory alloy plate, and pure cotton gauze. The rubber bulb is located outside the nasopharyngeal airway body, the spherical cover is located outside the rubber bulb, and the pure cotton gauze is located outside the spherical cover. The first micropore is located inside the side wall of the spherical cover, the arc-shaped baffle is located inside the inner wall of the spherical cover, and the second micropore is located inside the arc-shaped baffle. The shape memory alloy plate connects to the arc-shaped baffle. Medication is stored between the rubber bulb and the spherical cover. The rubber bulb expands or contracts to release medication or absorb medication. The shape memory alloy plate straightens or bends, causing the first and second micropores to connect or be offset. In this invention, inflammation inside the patient's nasal cavity causes localized heat and swelling, causing the rubber bulb to expand and release medication while simultaneously squeezing the pure cotton gauze to evenly coat the medication. The shape memory alloy plate deforms to facilitate the release or replenishment of medication.

The utility model relates to a medical gauze wrapped cotton cushion dressing, and belongs to the technical field of medical dressings. The medical gauze wrapping cotton pad dressing comprises a cotton pad, the cotton pad comprises a cotton block and wrapping cotton gauze wrapping the cotton block, and the cotton pad further comprises a water-repellent film arranged between one surface of the cotton block and the wrapping cotton gauze; the medical gauze wrapped cotton pad dressing further comprises a gauze bandage used for fixing the cotton pad. According to the utility model, the water-repellent film is arranged between one surface of the cotton block and the cotton gauze, so that the surface of the dressing can be kept dry; and secondly, the dressing is compressed and plastically packaged, so that the problem of large occupied space during storage and transportation of the dressing is solved, and the vacuum plastic packaging also has a good antibacterial effect.

The invention discloses pain sustained-release collateral-dredging ointment and a preparation method, and relates to the field of traditional Chinese medicine plasters, the pain sustained-release collateral-dredging ointment comprises a cotton yarn layer, a heating layer, an adhesive layer, a film net bag layer and a cooling gel layer, the cooling gel layer is annularly pasted on the cotton yarn layer, the adhesive layer is arranged on the inner side of the cooling gel layer, the heating layer is arranged on the inner side of the adhesive layer, and the film net bag layer is arranged on the inner side of the heating layer. The heating layer is adhered to the cotton yarn layer, plaster is adhered to the side, away from the cotton yarn layer, of the heating layer, the plaster is covered with the thin film net bag layer, the thin film net bag layer is adhered to the cotton yarn layer, water and a heating agent are arranged on the heating layer, and the plaster is mainly composed of 6-9 parts of elderberry, 2-6 parts of coral snake, 2-5 parts of gaultheria yunnanensis and 2-5 parts of tetragonal wood veneer. The ointment prepared by combining the medicines has the functions of relieving swelling and pain and promoting blood circulation to remove meridian obstruction; meanwhile, the comfort of a patient can be improved after the plaster covers the skin, and the heating layer is arranged and used for improving the activity of molecules in the plaster and improving the treatment efficiency.

An apparatus and a method are provided for a heating, ventilation, and air conditioning (HVAC) system air filter for a building ventilation system. The HVAC system air filter comprises a supportive frame configured to orient the HVAC system air filter within the building ventilation system. A composite filter medium retained within the supportive frame comprises a cotton gauze portion and an electrostatic portion. The cotton gauze portion is configured for treatment with a filter oil composition to enhance airflow and filtration of air flowing through the composite filter medium. The electrostatic portion is configured to electrostatically attract and agglomerate airborne molecular contaminants and volatile organic compounds (VOCs) as small as 0.001 microns in diameter. In some embodiments, the composite filter medium comprises substances configured to release a fragrance into air passing through the composite filter medium.

The application relates to the field of composite non-woven fabrics, and discloses a preparation method of a wet spunlace non-woven fabric composed of cotton gauze and pulp. The wet spunlace non-woven fabric comprises cotton gauze and a wet fiber layer which are intertwined with each other, and the preparation method comprises the following steps: disintegrating natural cellulose fiber pulp to obtain a fiber suspension; wet laying the fiber suspension to obtain a wet fiber web; laminating the wet fiber web and the cotton gauze, and pre-spunlacing to obtain a pre-spunlace composite fabric; front spunlacing the pre-spunlace composite fabric with 4-6 decreasing pressure channels, and then back spunlacing for 0-2 channels to obtain a spunlace composite fabric; and drying the spunlace composite fabric to obtain the wet spunlace non-woven fabric composed of cotton gauze and pulp. The natural cellulose fiber pulp is combined with the cotton gauze, and a special spunlace process is adopted, so that the composite strength between the cotton gauze and the wet fiber layer can be improved, and the obtained wet spunlace non-woven fabric has a small difference between two sides.