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81results about How to "Keep a humid environment" patented technology
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Preparation method of medical quick imbibition foam material
ActiveCN101507826ASimple preparation processProcess is easy to controlAbsorbent padsBandagesSaline waterChemistry
The invention relates to a method for preparing a medical quick liquid-absorbing foam material. The method comprises the steps of well mixing polyvinyl alcohol aqueous solution, aldehyde and a pore-forming agent, adding acid to the mixture, continuing to stir the mixture, pouring the mixed solution into a die, curing and molding the mixed solution, washing and drying the obtained product and obtaining a target object. The material has abundant mutually communicated opening structures through a method of using mechanical foaming together with the pore-forming agent. The prepared material is good in biological compatibility and excellent in hydrophilcity, has the liquid-absorbing capability much higher than common cotton yarn and paper, has the capability of quickly absorbing a large amount of distilled water, physiological saline and urine, turns into soft tenacious elastic sponge after absorbing liquid, is resistant to heat and ultraviolet radiation, and can be disinfected in a plurality of ways. The prepared material is a rigid foam material in a dry state, is a spongy material in a wet state, has the apparent density of between 0.04 and 0.09 g / cm and the liquid-absorbing ratio of between 1,800 and 2,800 percent, and can be applied to medical operations.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Bacteriostatic hydrocolloid dressing and preparation method thereof
InactiveCN101862470AImprove water solubilityGood antibacterial propertiesAbsorbent padsBandagesChemistrySodium carboxymethylcellulose
The invention discloses a bacteriostatic hydrocolloid dressing and a preparation method thereof. The dressing comprises a polyurethane film, a hydrophilic colloid layer and a peeling layer which are adhered in turn. The preparation method comprises the following steps of: mixing a medical grade rubber substrate, gelatin, mineral oil, an antioxidant, sodium carboxymethyl cellulose, calcium alginate, a tackifier, O-carboxymethyl chitosan and dried nano-silver powder uniformly to obtain a blend; uniformly coating the obtained blend on the polyurethane film to form the hydrophilic colloid layer; covering the peeling layer on the hydrophilic colloid layer; and stamping to obtain the bacteriostatic hydrocolloid dressing. The bacteriostatic hydrocolloid dressing of the invention has high bacteriostasis, and simultaneously has the characteristics of high capacity of absorbing transudate, waterproofness, air permeability, firm adhesion, high compliance, capability of meeting diversified requirements on complicated wound, and simple and easily-implemented preparation method.
Owner:WUHAN RUIER BIOTECH
Light emitting diode device with luminescent material
ActiveUS20120305972A1Toxic reductionKeep a humid environmentLuminescent compositionsSemiconductor devicesCrystal structureLength wave
The invention provides a light emitting diode device comprising a light emitting diode arranged on a substrate and a wavelength converting element. The wavelength converting element contains a luminescent material a Mn4+-activated fluoride compound having a garnet-type crystal structure. The Mn4+-activated fluoride compound preferably answers the general formula {A3}[B2-x-yMnxMgy] (Li3) F12-dOd, in which formula A stands for at least one element selected from the series consisting of Na+ and K+ and B stands for at least one element selected from the series consisting of Al3+, B3+, Sc3+, Fe3+, Cr3+, Ti4+ and In3+, and in which formula x ranges between 0.02 and 0.2, y ranges between 0.0 (and incl. 0.0) and 0.4 and d ranges between 0 (and incl. 0) and 1. As the luminescent materials of the described type and structure have high stability and low sensitivity towards humid environments, they can advantageously be used as in wavelength conversion elements of LED devices.
Owner:LUMILEDS
Medical hydrogel wound dressing and preparation method thereof
The invention discloses a preparation method of a medical hydrogel wound dressing, 20 to 30 percent by weight of sodium polyacrylate, 2 to 6 percent by weight of polyvinyl alcohol and 60 to 78 percent by weight of water are taken as raw materials, the medical hydrogel wound dressing is obtained by casting, radiation cross-linking grafting and sterilization, the radiation dose rate is 15kGy / time, and the dose is 30 to 90kGy. The hydrogel wound dressing obtained by the invention has very high swelling degree and can greatly reduce the replacement of the dressing and be doped with a cell growth factor for slow release, thus being the ideal wound dressing for treating various burns, scalds, trauma wounds and other wounds, more particularly, the large-area and hypertonic skin wounds; furthermore, the preparation process is simple and the cost is slow, thus having good industrial application prospect.
Owner:SUZHOU UNIV
Replacement cartridge for a razor assembly
InactiveUS7370419B2High coefficient of frictionConsiderable utilityMetal working apparatusBiomedical engineeringRazor Blade
A replacement cartridge for a razor assembly is provided that includes a shaving aid body for use with the razor assembly. The shaving aid body includes an aperture disposed within a contact surface. The aperture is sized to receive a razor cartridge. Some embodiments of the present replacement cartridge include a base. In some of those embodiments the base includes one or more features for attaching the replacement cartridge to the razor assembly.
Owner:EDGEWELL PERSONAL CARE BRANDS LLC
Medical composite dressing for wound repair and preparation method thereof
ActiveCN111529748AImprove water resistanceGood moisturizing effectLayered productsElectro-spinningCellulosePolymer science
The invention discloses a medical composite dressing for wound repair. The dressing comprises an inner layer which is in contact with a wound, a middle layer and an outer layer. The dressing is characterized in that: the inner layer is a chitosan / polyvinyl alcohol / oxidized sodium alginate blended nano-fiber antibacterial layer; the middle layer is an aerogel moisture absorption layer prepared by subjecting a sodium alginate / polyvinyl alcohol / sodium carboxymethyl cellulose nanofiber membrane to shearing and freeze-drying treatment; and the outer layer is a non-woven fabric breathable layer, andthe inner layer, the middle layer and the outer layer are compounded through medical glue. According to the composite dressing, the mechanical property of the dressing is improved by utilizing an electrostatic spinning technology. Meanwhile, the nanofiber membrane prepared according to the electrostatic spinning technology and the nanofiber membrane aerogel obtained through aftertreatment have high porosity and large surface area, the excellent breathability can be achieved while the high moisture absorption and moisture retention performance is guaranteed, exudate diffusion is reduced, the skin is kept clean, and the dressing can be widely applied to recovery treatment of various wounds.
Owner:DONGHUA UNIV
Novel asymmetric wettable electrostatic spinning double-layer film and preparation method thereof
PendingCN109908392AImprove hydrophilicityImprove water retentionAbsorbent padsBandagesWound dressingElectrospinning
The invention discloses a novel asymmetric wettable electrostatic spinning double-layer film comprising a hydrophobic layer and a hydrophilic layer which are in fit connection. The hydrophobic layer is made of a hydrophobic material, the hydrophilic layer is made of a hydrophilic material, and the hydrophobic material and the hydrophilic layer are made by adopting an electrostatic spinning method.The hydrophobic layer is waterproof and resistant to adhesion and bacteria, so that adverse impact on skin wounds caused by intrusion of foreign substances is prevented; the hydrophilic layer enhances hydrophilicity and water retaining performance of the film, thereby being conductive to absorbing exudates of the wounds, maintaining humid environment of the wounds and promoting quick healing of the wounds. The film is prepared through electrostatic spinning technology, and the hydrophobic layer and the hydrophilic layer are high in controllability in design, so that the film can meet all requirements of ideal wound dressings. The invention further discloses a preparation method of the film.
Owner:GUANGZHOU CHUANGSAI BIOLOGICAL MEDICAL MATERIALS CO LTD
Compound multilayer medical dressing of aquatic biological source crosslinking collagen
ActiveCN107233613AWide variety of sourcesIncrease profitConnective tissue peptidesSurgical adhesivesFreeze-dryingCollagen sponge
The invention discloses an aquatic biological source medical collagen with high purity and activity, and is capable of solving the problems of a natural collagen dressing that the mechanical strength is bad, the degradation resistance ability is weak and the wound is easily infected by microorganisms. An acid extraction method and a method of removing telopeptide by pepsase are used for extracting the collagen, the extraction ratio is improved by the ultrahigh pressure treatment and a tissue mashing method, and through a series of purification operations, such as decellularization, protein elimination, degreasing, repeated salting out, dialysis, degerming, decoloration and heat source removal, the medical collagen with the high purity and activity is prepared. A netlike collagen sponge with uniform pores is prepared by a vacuum freeze-drying technology, and the collagen sponge is modified by a physical crosslinking and chemical crosslinking mode so as to prepare the inner layer, and is compounded with a chitosan outer layer film and a medical non-woven fabric base cloth layer, finally a compound multilayer medical dressing finished product is obtained by Co-60 sterilization.
Owner:OCEAN UNIV OF CHINA
Biological medicine film and its preparation method
InactiveCN1411805AGood biocompatibilityGood affinityAnthropod material medical ingredientsPharmaceutical non-active ingredientsBorneolMembrane configuration
The preparation method of biological medicinal membrane for curing stomatocace includes the following steps: preparing Chinese medicine suspension, it is made up by using Chinese medicinal materials of borneol, larva of common house-fly and suma gallnut; preparing chitosan colloidal pulp; preparing gelatin colloidal pulp; preparing membrane colloidal pulp; forming medicinal membrane; sterilizing and packaging. Its composition is formed from (by weight portion) 35-45 portions of chitosan colloidal pumlp, 5-15 portions of gelatin colloidal pulp and 20-30 portions of Chinese medicine suspension.
Owner:北京中科天鹤生物技术有限公司
Long-acting sustained-release wound dressing containing levofloxacin sustained-release microspheres, and preparation method thereof
InactiveCN102302458ASmall particle size distributionFlat surfaceAntibacterial agentsOrganic active ingredientsWound dressingMicrosphere
The invention discloses a long-acting sustained-release wound dressing containing levofloxacin sustained-release microspheres. According to the preparation method of the wound dressing, levofloxacin sustained-release microspheres with grain diameter between 10 and 20mu m are fixed in a composite medical non-woven fabric which mainly comprises chitosan fiber, alginate fiber, viscose fiber, and hydrophobic ethylene propylene fiber; and the long-acting sustained-release wound dressing is prepared by taking the levofloxacin sustained-release microspheres as a medicinal component. In a use process, the medicament quickly release levofloxacin after contacting the blood, tissues and surrounding skin of the wound, and can continuously release levofloxacin for a long time, and the effective release of levofloxacin accumulatively reaches 168h. The long-acting sustained-release wound dressing is applied to treatment of bacterium infection of burnt and scalded skin, and the microsphere state medicament can remarkably improve the bioavailability of effective components of the medicament; and the long-acting sustained-release wound dressing has excellent moisture penetrability, hygroscopicity, mechanical tensile property and biocompatibility, the frequency of dressing change can be reduced, and the curative effect and administration safety cam be enhanced.
Owner:SANITARY EQUIP INST ACAD OF MILITARY MEDICAL SCI PLA
Electronic apparatus and lighting device
InactiveUS20060034056A1Improve assembly workabilityReduce material costsElectric circuit arrangementsGas-tight/water-tight arrangementsFilling materialsEngineering
Owner:TOSHIBA LIGHTING & TECH CORP
Povidone iodine hydrogel antibacterial dressing and preparation method thereof
The invention relates to a povidone iodine hydrogel antibacterial dressing and a preparation method thereof, and belongs to the field of medicines. In view of deficiencies of the prior art, a purposeof the invention is to provide a povidone iodine hydrogel antibacterial dressing prepared from the following raw materials in parts by weight: 0.25 to 1 part of chitosan, 0. 5 to 3 parts of povidone iodine, 0.5 to 2 parts of propylene glycol, 2 to 6 parts of glycerin, 10 to 20 parts of poloxamer, 2 to 4 parts of acetic acid, and 100 to 120 parts of purified water. The antibacterial dressing can not only make the wound in a humid environment, but also relieves the release of a pharmaceutical effect of the povidone iodine, prolongs the duration of the pharmaceutical effect, has a good antibacterial effect, stability, and a wide application range, has a good therapeutic effect on healing of the wound, promotes skin regeneration, and reduces scar formation.
Owner:GUANGZHOU RAINHOME PHARM&TECH CO LTD
Chitosan quaternary ammonium salt hydrogel antibacterial dressing and preparation method thereof
The invention relates to a chitosan quaternary ammonium salt hydrogel antibacterial dressing and a preparation method thereof, and belongs to the field of biomedicine. The chitosan quaternary ammoniumsalt hydrogel antibacterial dressing is prepared from the following raw materials in parts by weight: 0.1-5 parts of a chitosan quaternary ammonium salt, 0.1-5 parts of an organosilicon quaternary ammonium salt, 1-8 parts of a cellulose derivative, 5-20 parts of glycerol and 80-120 parts of purified water. The chitosan quaternary ammonium salt hydrogel antibacterial dressing provided by the invention has a good antibacterial effect, stability and a wide application range, and has a good therapeutic effect on wound healing.
Owner:GUANGZHOU RAINHOME PHARM&TECH CO LTD
Chitosan collagen gel and application thereof
InactiveCN102108211AKeep a humid environmentPromote healingAbsorbent padsBandagesChronic woundWater soluble
The invention relates to a chitosan collagen gel and an application thereof, and the gel comprises 1-15% of chitosan, 1-20% of collagen, 0.1-1% of gel matrix and water, wherein the chitosan is water-soluble chitosan with the molecular weight of 1500 Daltons-0.4 million Daltons, the molecular weight of the collagen is 5000 Daltons-3 million Daltons; and the gel matrix is selected from one or two of carbomer, polyethylene type and cellulose derivatives. The chitosan collagen gel is applied in hemostasis of acute and chronic wounds, absorption of seepage, autolytic debridement, protection of exposed nerve endings and pain relief, and can be simultaneously used for keeping moist environment of the wounds, accelerating the healing of the wounds and inhibiting scar formation.
Owner:沈阳圣兴生物科技有限公司
External medical dressing for first aid of burns and preparation method thereof
ActiveCN105169455AInhibit the growth of bacteriaGood for wound dressingAbsorbent padsDermatological disorderMoisture retentionFirst aid
The invention relates to the technical field of medical dressing, and specifically relates to an external medical dressing for first aid of burns and a preparation method thereof. The medical dressing comprises the following raw materials in parts by weight: 40 to 50 parts of chitosan quaternary ammonium salt, 25 to 35 parts of indigo naturalis powder, 8 to 12 parts of humectant, 3 to 7 parts of bletilla striata extract, 3 to 7 parts of garden burnet extract, and 3 to 7 parts of Japanese eupatorium extract. The provided medical dressing can rapidly stop bleeding, relieve pains, protect wounds, and eliminate scars, at the same time, is capable of inhibiting the growth of bacteria, and can be well attached on the wounds. Moreover, the medical dressing can relieve wound pains, control local infection, maintain the moisture of skins of wounds, protect skins, promote wound healing, and prevent scar formation, and is capable of being widely applied to rapid hemostasis, moisture retention, emergency, and treatment of burns and prevention of scar formation.
Owner:DONGGUAN DAQING MEDICAL DEVICES CO LTD +2
Collagen/calcium alginate/chitosan composite hemostatic sponge and making method
The invention relates to the technical field of local trauma hemostatic dressing, in particular to a collagen / calcium alginate / chitosan composite hemostatic sponge and a making method. The composite hemostatic sponge is characterized by being prepared from dissolving collagen, calcium alginate and chitosan according to a certain proportion and adopting a freeze-drying method. After the composite hemostatic sponge contacts with the surface of a wound, blood platelets can be quickly gathered to form blood scab; the composite hemostatic sponge absorbs a lot of exudate due to good liquid absorbing performance to apply certain pressure on the wound so as to play a certain role in pressing hemostasis; a lot of Ca+ in the composite hemostatic sponge can quickly exchange with Na+ in blood after the composite hemostatic sponge contacts with the surface of the wound, so that thrombin generation is promoted, and blood coagulation of the surface of the wound is accelerated. The composite hemostatic sponge can be used for body wound hemostasis.
Owner:NAVY MEDICINE RES INST OF PLA
Novel 3D bionic skin dressing and preparation method thereof
ActiveCN112190750APromote growthAvoid infectionAdditive manufacturing apparatusAbsorbent padsDermal dressingHair follicle
The invention provides a novel 3D bionic skin dressing and a preparation method thereof. The novel 3D bionic skin dressing comprises a hydrophilic layer fibrous membrane and a hydrophobic layer fibrous membrane which are connected with each other, wherein the hydrophilic layer fibrous membrane is loaded with a bioactive substance, the hydrophobic layer fibrous membrane is loaded with an antibacterial substance, the surface of the hydrophilic layer fibrous membrane and the surface of the hydrophobic layer fibrous membrane are each provided with a bionic hair follicle layer, each bionic hair follicle layer comprises hair follicle holes which are symmetrically arranged, the hair follicle holes penetrate through the hydrophilic layer fiber membrane and the hydrophobic layer fiber membrane, andthe hair follicle holes are filled with hydrogel layers. The novel efficient dressing is provided for the treatment of burn wounds, the theoretical and application development of the 3D bionic skin dressing in promoting burn wound treatment is promoted, a new thought and approach are provided, and important academic values and application prospects are achieved.
Owner:GUANGDONG UNIV OF TECH
Weeding moisturizing material, weeding moisturizing cloth and preparation method
ActiveCN102986490AGrowth inhibitionFast growthSynthetic resin layered productsNon-woven fabricsFiberPolyethylene terephthalate
The invention discloses a weeding moisturizing material, a weeding moisturizing cloth and a preparation method. A weed killer is loaded on a non-woven fabric with polyethylene terephthalate (PET) as a raw material and composited with a super absorbent resin to form the weeding moisturizing material; according to the weeding moisturizing cloth, a bottom layer is a non-woven geotextile fabric, an upper layer is the non-woven fabric which is loaded with the weed killer and uses the PET as the raw material, a middle layer is the super absorbent resin, and the three layers are punctured and composited to form the weeding moisturizing cloth; and the preparation method of the weeding moisturizing cloth includes that the PET is spun into as-spun fibers, the obtained as-spun fibers are drafted and subjected to air flow spinning jet to form a fiber mesh, the obtainer fiber mesh is subjected to punching strengthening, an aqueous solution of weed killer is sprayed on the surface of the fiber mesh, the fiber mesh is dried to obtain the non-woven fabric which is loaded with the weed killer and uses the PET as the raw material, and the obtained three materials of the non-woven fabric, the super absorbent resin and the non-woven geotextile fabric are punctured and composited to form the weeding moisturizing cloth. The weeding moisturizing material and the weeding moisturizing cloth have the advantages that the weeding and moisturizing effects are good, the seedling raising costs are lowered, the weeding moisturizing material and the weeding moisturizing cloth are environment-friendly, and water and soil can be conserved. The preparation method of the weeding moisturizing cloth is simple, low in costs and capable of achieving massive industrialized production.
Owner:长沙建益新材料有限公司
Liquid carboxy-containing polyester oligomer, water-compatible polyurethane resin, and process for producing the same
InactiveUS20060167203A1Without deteriorating working environmentKeep a humid environmentPolyurea/polyurethane coatingsPolyesterPolyol
A carboxy-containing polyester polyol which is obtained by polymerizing ε-caprolactone by ring-opening polymerization with a compound represented by the formula (1): HOCH2C(COOH)RCH2OH (1) (wherein R is C2 or higher alkyl) and which has a number-average molecular weight of 550 to 950 and is liquid at ordinary temperature. This polyol can give a water-compatible polyurethane resin which is excellent in the preservation of a working atmosphere during handling and application and has excellent drying properties after application, and which has homogeneity and excellent stability and is useful in a wide range of applications such as a binder for coating materials, printing inks, etc. and an adhesive. By the production process, a water-compatible polyurethane resin which is excellent in the preservation of a working atmosphere and drying property and is homogeneous and stable can be easily produced.
Owner:DAICEL CHEM IND LTD
In-situ-forming self-repairing antibacterial hydrogel and preparation method thereof
The invention relates to in-situ-forming self-repairing antibacterial hydrogel and a preparation method thereof. The medical hydrogel dressing with functions of fast in-situ forming, self-repairing and bacterium resisting is prepared by combining oxidized formyl sodium hyaluronate of different molecular weights and sodium hyaluronate of different molecular weights. Formyl has reaction with amino in polycation polymer to form dynamic Schiff base bonds which allows the hydrogel to have the self-repairing function, and free sodium hyaluronate of different molecular weights plays a synergistic role to promote skin repairing. The hydrogel is simple and convenient in preparation method, capable of achieving injection in-situ forming and promising in application prospect in the field of biological medical materials.
Owner:SHANDONG BRANDEN MEDICAL DEVICE
Liquid trehalose dressing for skin barrier wound repair and preparation method thereof
ActiveCN111956860AReduce hyperpigmentationEnhance soothing and caring functionsClimate change adaptationBandagesSodium hyaluronateAnti-inflammatory
The invention provides a liquid trehalose dressing for skin barrier wound repair and a preparation method thereof. The liquid trehalose dressing comprisese 8 to 10 parts of trehalose, 1 to 5 parts ofcompound polysaccharide, 1 to 3 parts of epsilon-polylysine, 0.5 to 1.5 parts of an ethanol extract of bamboo leaf flavonoid, 0.03 to 0.06 part of a lactic acid bacillus / soybean milk fermentation product filtrate, 12 to 15 parts of sodium hyaluronate, 5 to 6 parts of collagen, 1.5 to 2.5 parts of a polyol humectant and 1000 to 1100 parts of water. According to the invention, a more stable and moist microenvironment with good air permeability is provided for wound healing; good antibacterial, anti-inflammatory and anti-oxidation effects and a wound surface nursing function are achieved; pigmentation is reduced; stimulation effect on the skin of a wound surface is reduced; the ability of the skin in adapting to the environment is improved; wound surface healing time is shortened; and the dressing can be widely applied to auxiliary repair of wound surfaces produced in laser and tartaric acid skin replacement, microcrystal grinding, hydro lifting and microacupunoture.
Owner:海南鸿翼医疗器械有限公司
A blooming period prolonging drought-resistant nutrient solution
InactiveCN105906420AEasy to transportDelay the aging processAnimal corpse fertilisersAlkali orthophosphate fertiliserAcetic acidPhosphate
A blooming period prolonging drought-resistant nutrient solution is disclosed. The nutrient solution is prepared from 32-35 parts by weight of crab shell powder, 22-24 parts by weight of furfural residue, 6-8 parts by weight of phospholipid oil, 4-5 parts by weight of diglycol, 2-3 parts by weight of nanometer silica, 7-8 parts by weight of monoammonium phosphate, 44-46 parts by weight of pomegranate seeds, 1.7-1.9 parts by weight of sodium hexametaphosphate, 26-28 parts by weight of eucommia leaves, 1.9-2.1 parts by weight of ethylenediaminetetraacetic acid powder, a proper amount of an ethanol solution having a concentration of 50%, a proper amount of ethanol solution having a concentration of 65% and a proper amount of water. The nutrient solution adopts the phospholipid oil, the diglycol, and other raw materials to ensure good film forming performance of the nutrient solution. After petals and leaves are sprayed with the nutrient solution, film layers can be formed firmly. Excellent hydrophobicity of the added nanometer silica reduces water loss of flowers under drought conditions, locks rest water in petals and leaves under a long-term water-shortage condition, and ensures the moisture environment in cells, thus prolonging the duration time of the blooming period.
Owner:FEIDONG KEWENBIN FAMILY FARM
Medical moist composite dressing and preparation method thereof
InactiveCN102350005AReduce the number of replacementsAids in healingAbsorbent padsNon-woven fabricsWound healingFiber
The invention discloses a medical moist composite dressing which comprises 20-50% of poly(glycolide-co-lactide) (PGLA) and 50-80% of sodium alginate by mass percent. According to the technical scheme disclosed by the invention, as the medical moist composite dressing comprises the PGLA and the sodium alginate, high water absorption of the sodium alginate ensures moist environments of wounds, the PGLA has good mechanical properties, a network structure is formed in the dressing, and a gel film formed by sodium alginate fibers can be put on the wounds for a long time and is not easy to damage, thus reducing the change times of the dressing and being beneficial to wound healing.
Owner:CHINESE TEXTILE ACAD
Chitosan composite dressing and preparation method thereof
ActiveCN106963973AGood gel formGood biocompatibilityPharmaceutical delivery mechanismAdhesive dressingsBody fluidBiomedical engineering
The invention discloses a chitosan composite dressing and a preparation method thereof. The composite dressing comprises a chitosan dressing base layer, a medical water absorbing base layer, a waterproof layer and a medical adhesive tape adhesion layer, wherein the waterproof layer covers the medical adhesive tape adhesion layer; the medical water absorbing base layer is positioned between the chitosan dressing base layer and the waterproof layer; air holes are formed in the chitosan dressing base layer; the shapes and the areas of the chitosan dressing base layer, the medical water absorbing base layer and the waterproof layer are the same; anti-adhesion paper covers the chitosan dressing base layer; and the area of the anti-adhesion paper is consistent to that of the medical adhesive tape adhesion layer. The air holes on the chitosan dressing base layer and the medical water absorbing base layer can guarantee high permeability of water and air, and a wound is prevented from turning white and swelling. The medical water absorbing base layer has a water absorbing pad structure with high water absorption capability, tissue exudate penetrates through the air holes and is absorbed by the water absorbing pad, and efficient liquid absorption property is achieved. The waterproof layer can prevent excessive body fluid from permeating onto a medical adhesive tape, a part covered by the dressing can be fixed well, and the dressing cannot drop easily.
Owner:GUANGZHOU RAINHOME PHARM&TECH CO LTD
Antibacterial adhesive bandage containing povidone iodine
The invention provides an adhesive bandage. The adhesive bandage comprises a wound protective cushion and an adhesive backing, wherein the wound protective cushion consists of a nonwoven fabric and a PE partition membrane, and the nonwoven fabric is coated by a medicament and is povidone iodine. The invention also provides a preparation method of the adhesive bandage. With the adoption of the adhesive bandage prepared from the povidone iodine, the cost is controllable, the use and the carrying are convenient, and the adhesive bandage and the povidone iodine can jointly take the functions of antibiosis, hemostasis and wound protection together.
Owner:YUNNAN BAIYAO GROUP
Composite sponge and preparation method thereof
InactiveCN105944135AIncreased polycationic propertiesImprove antibacterial propertiesAbsorbent padsBandagesPolymer scienceGlycerol
The invention relates to composite sponge and a preparation method of the composite sponge. The composite sponge is prepared from the following components in percentage by weight: 5%-15% of chitosan quaternary ammonium salt, 10%-23% of hyaluronic acid-RGD peptide, 25%-38% of gelatin, 15%-36% of PVA, and 5%-25% of glycerol. With the adoption of the technical scheme, the composite sponge and the preparation method have the beneficial technical effects that the antibacterial property of the novel chitosan sponge is improved, and the repairing for the surface of the wound is enhanced; the composite sponge containing the chitosan quaternary ammonium salt is simple in preparation method and low in cost, is safe and non-toxic, is obvious in antibacterial effect, can promote the cell growth, is beneficial for the repairing of the surface of the wound, is high in water absorption rate, and is suitable for industrial production.
Owner:WUHAN UNIV OF TECH
Plantation method for high productivity of dendrobe
The invention relates to the field of plantation of Chinese herbal medicine, and especially relates to a plantation method for high productivity of dendrobe. The method is characterized in that the method comprises the following steps: 1, selecting a land which is located in a low mountainous area with altitude being from 300 m to 700 m and in the northwest slope or northeast slope of a river valley, and has rocks and stone walls with bryophyte; 2, selecting seedlings which are 1-2 years old, are strong, are strong in root system, have many sprout tillers, have no diseases and insect pests, and are dug up with roots; 3, dividing the seedlings for cultivation: enabling tree skin to be cut into scale openings at 30 cm intervals, enabling the roots to be placed in the scale openings, clamping the roots or bundling the roots through a bamboo skin, coating the roots with waste mud which is formed by the mixing of cow dung with sewer sludge, selecting a big stone with moss, enabling dendrobe seedlings to be placed in slits of the big stone, pressing the roots of the dendrobe seedlings through small stones, and coating the periphery with the waste mud; 4, carrying out watering and weeding; 5, carrying out topdressing; 6, carrying out trimming; 7, carrying out the prevention and cure of diseases and pests; 8, carrying out harvesting.
Owner:何钢
Drug loaded amnion sheet and preparation method and applications thereof
InactiveCN107349335ANo wasteProlong the action timeHydroxy compound active ingredientsMetabolism disorderDiseaseBletilla striata
The invention relates to a drug loaded amnion sheet and a preparation method and applications thereof. Specifically, the drug loaded amnion sheet comprises a dry amnion and following components, which are loaded on the dry amnion and substrate membrane surface of amnion, in parts by weight: 5 to 30 parts of bletilla striata, 10 to 30 parts of calcined gypsum, 3 to 25 parts of frankincense, 3 to 25 parts of myrrh, 10 to 30 parts of rhizoma atractylodis, 0.5 to 5 parts of artificial musk, 1 to 15 parts of borneol, and 2 to 30 parts of safflower. The invention also discloses a preparation method of the drug loaded amnion sheet and an application of the drug loaded amnion sheet in the preparation of a medical material for treating skin ulcer diseases. The rapid release and slow release functions of the drug loaded amnion sheet are combined, and the drug loaded amnion sheet can sustain an effective drug concentration in the local environment of wounds.
Owner:JILIN TUO HUA BIOTECH
Medical negative-pressure adsorption dressing and application thereof
InactiveCN104622643AReduce chance of wound infectionShorten wound healing timeWound drainsAdhesive dressingsHealing timeBiomedical engineering
Owner:SHANGHAI TONGREN HOSPITAL
Light emitting diode device with luminescent material
ActiveUS9133390B2Toxic reductionKeep a humid environmentLuminescent compositionsSemiconductor devicesCrystal structureFluoride
The invention provides a light emitting diode device comprising a light emitting diode arranged on a substrate and a wavelength converting element. The wavelength converting element contains a luminescent material a Mn4+-activated fluoride compound having a garnet-type crystal structure. The Mn4+-activated fluoride compound preferably answers the general formula {A3}[B2-x-yMnxMgy](Li3)F12-dOd, in which formula A stands for at least one element selected from the series consisting of Na+ and K+ and B stands for at least one element selected from the series consisting of Al3+, B3+, Sc3+, Fe3+, Cr3+, Ti4+ and In3+, and in which formula x ranges between 0.02 and 0.2, y ranges between 0.0 (and incl. 0.0) and 0.4 and d ranges between 0 (and incl. 0) and 1. As the luminescent materials of the described type and structure have high stability and low sensitivity towards humid environments, they can advantageously be used as in wavelength conversion elements of LED devices.
Owner:LUMILEDS
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