CN106075530B - A kind of production method of bioactivity charcoal - Google Patents

A kind of production method of bioactivity charcoal Download PDF

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Publication number
CN106075530B
CN106075530B CN201610533899.2A CN201610533899A CN106075530B CN 106075530 B CN106075530 B CN 106075530B CN 201610533899 A CN201610533899 A CN 201610533899A CN 106075530 B CN106075530 B CN 106075530B
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Prior art keywords
charcoal
bioactivity
bioactivity charcoal
oxygen
moist
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CN106075530A (en
Inventor
陆贵平
钱捷豪
王刚平
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Zhuhai Yasha Medical Devices Co Ltd
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Zhuhai Yasha Medical Devices Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/18—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/24—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/28—Polysaccharides or their derivatives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/32—Proteins, polypeptides; Degradation products or derivatives thereof, e.g. albumin, collagen, fibrin, gelatin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/425—Porous materials, e.g. foams or sponges
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/44—Medicaments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/10—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing inorganic materials

Abstract

The invention discloses a kind of production methods of bioactivity charcoal, using the pore structure feature and powerful adsorption capacity of the huge surface area of active carbon and complexity, by Oxygen Adsorption in active carbon hole；It reapplies acrylic amide, alginic acid salt, gelatin class hydrophilic high molecular material to lock in oxygen in active carbon, bioactivity charcoal is made；Bioactivity charcoal can be added directly into liquid or skin repair dressing is made in emulsion, be added in semi-solid solution gel or ointment etc. is made；Can also with plant fiber, chemical fibre is blended is fabricated to medical application, non-woven fabrics, woven cloths etc., be widely used in the industries such as medical treatment, health, cosmetics.

Description

A kind of production method of bioactivity charcoal
Technical field
The present invention relates to a kind of production methods of bioactivity charcoal, and preparation is made as oxy-gen carriers using active carbon or applies Material etc., belongs to the industry fields such as medical cosmetology, medicine and cosmetics.
Background technique
Not recovering for a long time for wound is Now Domestic one of the technical problem that surgery faces outside, is also brought to traumatic patient huge Pain.One small minor cut or wound but can not always heal, even have a dull ache frequently.Data shows, China's Surgical Inpatients In, because the skin chronic injury or ulcer of refractory need the patient of hospitalization to account for about 1.5%, wherein diabetic ulcer is accounted for 36%, and ratio increased 6 times before 10 years.
Scientist is early it was demonstrated that the healing of epidermal wound needs certain oxygen.Micro- oxygen technology refers to using micro offer The technology of oxygen is currently used primarily in the needs for improving industrial food production, sewage treatment, therapeutic treatment etc..Currently, state It is inside and outside to have using micro- oxygen technology, oxygen therapy is taken to wounds such as Bone Injury, diabetes chronic ulcer wound surface, the surgical operation surface of a wound Method, daily to wound for oxygen blast gas 2 times, every time 30 minutes, to promote wound healing.Oxygen therapy subtraction unit is divided into two kinds, one kind It is made of oxygen caisson, oxygen catheter and oxygen mask, when use is controlled by oxygen oxygen valve, slightly pure for blowing to wound Oxygen；Another oxygen therapy device is Oxygen therapy apparatus, is made of oxygen generating plant and pipe fitting, and when use powers on, and oxygen instrument processed generates oxygen, Inflammation is prevented, wound healing is promoted to improve injury tissue oxygen content for oxygen blast gas to wound.
However, being had the following disadvantages: currently on the market to the oxygen therapy for promoting wound healing effect
1) oxygen therapy device equipment volume is big, and component is miscellaneous more, operates with inconvenience, and patient compliance is poor；
2) some oxygen therapy equipment need power supply, are not available in power free situation；
3) short to wound oxygen supply time.Generally wound is treated with oxygen, method is one time 30 minutes 2 times a day. Extended treatment time, patient often comply, prevent oxygen therapy is from playing greatest treatment efficacy；
4) prior art oxygen therapy plays certain inhibiting effect to anaerobic bacteria, but on aerobic bacteria without influence；
5) inconvenient to carry, be not suitable for outgoing, travelling and the standby use of family presiding judge.
The present invention utilizes the huge surface area of active carbon using active carbon as oxy-gen carriers by lot of experiments Hydrophily height is reapplied by Oxygen Adsorption in active carbon hole with complicated pore structure feature and powerful adsorption capacity Molecular material (such as acrylic amide, alginic acid salt, gelatin class) locks in oxygen in active carbon, and bioactivity charcoal is made.It carries There is oxygen activity charcoal extensive industrial use and medical application can be added to gelling agent, cream, spray in medical product Etc. in dosage forms, be made into wound wet dressing (such as wound repairs gel, repairs dressing)；Bioactivity charcoal may also pass through drying, Powdery is made, adds on adhesive-bonded fabric dressing, wound dry dressing (such as adhesive bandage, burn patch, trauma plaster etc.) is made；Such as makeup Bioactivity charcoal is added in product, can promote epidermal cell proliferation, repairs skin damage barrier, adsorbs bacterium, prevent bacterium infection, Reduce inflammation.It can also be used to improve hair microenvironment, adsorb bacterium, reduce dandruff.
In traumatism treatment, the preparation made of bioactivity charcoal or dressing can be directly applied to wound or spread on wound table Face slowly discharges oxygen, promotes wound healing.Meanwhile active carbon is also equipped with absorption bacterium in release oxygen simultaneously, it is antibacterial thin Bacterium growth, the effects of preventing wound infection, accelerate wound healing.Therefore, the present invention has intended to solve that current wound oxygen therapy is deposited The shortcomings that, and have the advantage that feature:
1) wound affected part only need to be applied to Wound healing and bone regeneration using bioactivity charcoal preparation, it is easy to use；
2) it is not necessarily to power supply when bioactivity charcoal preparation uses, can be carried at any time, house, travelling and medical institutions doctor are suitble to It uses；
3) bioactivity charcoal preparation is coated on wound patient, slowly can steadily discharge micro- oxygen.It can for a long time be wound Micro- oxygen environment is provided, accelerating wound healing reduces scar hyperplasia；
4) bioactivity charcoal maintains the suction-operated of active carbon, and adsorbable bacterial wound prevents wound infection from suppurating, and inhales Tissue exudates are received, wound healing is promoted.
Summary of the invention
Key technology of the invention is with porous material (active carbon, diatomite etc.) for carrier, and adsorption of oxygen utilizes height Oxygen is locked in the oxygen carrier system formed in carrier, sustainable release trace oxygen by the film forming of molecular material.
The present invention selects active carbon as oxy-gen carriers, special using the huge surface area of active carbon and complicated pore structure Point and powerful adsorption capacity, by Oxygen Adsorption in active carbon hole；Hydrophilic high molecular material is reapplied to lock in oxygen In active carbon, bioactivity charcoal is made.Hydrophilic high molecular material aqueous solution has the function of dissolved oxygen, and concentration of oxygen gas is in height It is steady that dynamic is formed in molecular material aqueous solution, can slowly the sub- molecule of sustained release micro amount of oxygen, improvement local microenvironment oxygen be contained Amount.
The production method of bioactivity charcoal of the present invention is specific as follows:
1) powdered activated carbon for being no more than tank body volume 2/3 is added to vacum reaction tank, covers lid；
2) it will be vacuumized in vacum reaction tank, and vacuum degree is less than -0.1kg/cm2；
3) purity oxygen is inculcated into vacum reaction tank, until pressure inside the tank closes oxygen valve when being less than atmospheric pressure；
4) 0.01%-5% (W/W) hydrophilic high molecular material aqueous solution, hydrophily high score are added into vacum reaction tank Sub- aqueous solution and activated carbon weight ratio are 2: 1, are added while stirring；PH value is adjusted after stirring 2 hours to 7.0 ± 0.5, is stirred for 1 Hour makes to be uniformly mixed.
5) unload loaded in bucket moist bioactivity charcoal.Moist bioactivity charcoal can be added directly into liquid, semisolid Corresponding spray or liniment, gelling agent or ointment are made in solution, is used for medicine, cosmetic use.
6) moist active carbon is pulverized into powder again after 45 degree of drying, obtains stemness bioactivity charcoal.
Stemness bioactivity charcoal is added in liquid or semisolid, can be made into the health cares such as liniment, spray, gelling agent Product.Can also be blended with plant fiber, chemical fibre etc., medical application, non-woven fabrics, woven cloths are made into, health and medical service is used for.
Heretofore described hydrophilic high molecular material includes acrylic amide, alginic acid salt, gelatin class moldability high score Sub- material, i.e., any aqueous solution for being used to lock oxygen in active carbon gap is in gelatinous high molecular material.
The present invention solves disadvantage present in current wound oxygen therapy, and has the advantage that feature:
1) wound affected part only need to be applied to Wound healing and bone regeneration using bioactivity charcoal preparation, it is easy to use；
2) it is not necessarily to power supply when bioactivity charcoal preparation uses, can be carried at any time, house, travelling and medical institutions doctor are suitble to It uses；
3) bioactivity charcoal preparation is coated on wound patient, slowly can steadily discharge micro- oxygen.It can for a long time be wound Micro- oxygen environment is provided, accelerating wound healing reduces scar hyperplasia；
4) bioactivity charcoal maintains the suction-operated of active carbon, and adsorbable bacterial wound prevents wound infection from suppurating, and inhales Tissue exudates are received, wound healing is promoted.
Specific embodiment
Embodiment 1: the preparation of skin repair dressing
1,4 kilograms of active carbons are taken, is placed in the vacuum stirring tank of 10 liters of capacity, covers lid, whole valves are closed.
2, vacuum pump is opened, extracts vacuum to being lower than -0.1kg/cm2, vacuum pump is closed, is slowly added into agitator tank pure Net oxygen.Air pressure rises to -0.02kg/cm2When, close oxygen valve.
3,8 kilograms of 0.1% carbomer hydrogel solution is extracted by feed pipe, is stirred when taking out, closed after feeding completely Valve stirs 2 hours, pH value is adjusted to 7.0 ± 0.5, continues to stir 1 hour, discharging, loaded in closed bucket, obtains moist load Oxygen activity charcoal.
4, moist bioactivity charcoal is in 0.5-5% ratio, with 0.5% aqueous solution of sodium hyaluronate, glycerol, butanediol, cigarette Amide etc. is configured to skin repair dressing.For being used after skin damage, burn, laser beam etc., promotes skin barrier reparation, promote Into wound healing.
Embodiment 2: needle punched non-woven fabrics dressing preparation 1
1,4 kilograms of active carbons are taken, is placed in the vacuum stirring tank of 10 liters of capacity, covers lid, whole valves are closed.
2, vacuum pump is opened, extracts vacuum to being lower than -0.1kg/cm2, vacuum pump is closed, is slowly added into agitator tank pure Net oxygen.Air pressure rises to -0.02kg/cm2When, close oxygen valve.
3,8 kilograms of 0.8% Sodium Alginate Hydrogel Films solution is extracted by feed pipe, is stirred when taking out, closed after feeding completely Valve closing door stirs 2 hours, pH value is adjusted to 7.0 ± 0.5, continues to stir 1 hour, discharging, dries in baking oven, is crushed, obtained Stemness bioactivity charcoal.
4, stemness bioactivity charcoal is made into needle punched non-woven fabrics dressing, for making in 0.5-5% ratio and viscose fiber blending Promote wound healing for medical surface of a wound protection at burn patch, trauma plaster.
Embodiment 3: the preparation 2 of needle punched non-woven fabrics dressing
1,4 kilograms of active carbons are taken, is placed in the vacuum stirring tank of 10 liters of capacity, covers lid, whole valves are closed.
2, vacuum pump is opened, extracts vacuum to being lower than -0.1kg/cm2, vacuum pump is closed, is slowly added into agitator tank pure Net oxygen.Air pressure rises to -0.02kg/cm2When, close oxygen valve.
3,8 kilograms of 0.8% carbomer hydrogel solution is extracted by feed pipe, is stirred when taking out, closed after feeding completely Valve stirs 2 hours, pH value is adjusted to 7.0 ± 0.5, continues to stir 1 hour, discharging, dries in baking oven, is crushed, obtained dry Property bioactivity charcoal.
4, stemness bioactivity charcoal is made into needle punched non-woven fabrics dressing, for making in 0.5-5% ratio and viscose fiber blending Promote wound healing for medical surface of a wound protection at burn patch, trauma plaster.
Embodiment 4: the preparation of tea polyphenols oil control facial cleanser
1,4 kilograms of active carbons are taken, is placed in the vacuum stirring tank of 10 liters of capacity, covers lid, whole valves are closed.
2, vacuum pump is opened, extracts vacuum to being lower than -0.1kg/cm2, vacuum pump is closed, is slowly added into agitator tank pure Net oxygen.Air pressure rises to -0.02kg/cm2When, close oxygen valve.
3,8 kilograms of 0.5% gelatin solution is extracted by feed pipe, is stirred when taking out, valve, stirring are closed after feeding completely 2 hours, pH value is adjusted to 7.0 ± 0.5, continues to stir 1 hour, discharging, loaded in closed bucket, obtains moist bioactivity charcoal.
4, moist bioactivity charcoal is in 0.5-5% ratio and tea polyphenols, Cocoamidopropyl betaine, cocounut oil acyl glycine The obtained tea polyphenols oil control facial cleanser such as sodium, sodium lauroyl sarcosine is nursed for facial cleansing.
Embodiment 5: the application verification of skin repair dressing
The skin repair dressing prepared using embodiment 1 does following animal experiment verifying:
New zealand rabbit 40, half male and half female, 2.0 scholar 0.5kg of weight.Depilation, back part of animal are scalded with alcohol gauze, Forming area is about 4cm2The deep II degree burn wound surface of a wound 2, prepare deep II degree burn wound model；It is model control group 20, positive Control group 20.It is smeared respectively in burned part and (bioactivity charcoal is not added in control group drug) is administered, the 1-2 days, 1 times/day；The 3-7 days, 1 time/2 days；The 8-28 days, 1 time/3 days, successive administration 28 days.Detection:
(1) surface of a wound is observed: surface of a wound color, inflammation, diffusate etc.；The case where necrotic tissue falls off, epithelium and granulation tissue The case where growth；
(2) wherein 2 wound healing times are observed and measure 3 days, 7 days, 14 days, 21 days, 28 days surface of a wound after coating treatment Heal area, calculates healing percentage.
Average Wound healing rate result is as follows:
Conclusion: bioactivity charcoal can be obviously promoted wound healing.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by the embodiment Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention, It should be equivalent substitute mode, be all included in the scope of protection of the present invention.

Claims (7)

1. a kind of production method of bioactivity charcoal, it is characterised in that its production method includes:
1) powdered activated carbon is added to vacum reaction tank, the volume of the powdered activated carbon of addition is no more than vacuum reaction tank 2/ 3 volumes cover lid and will vacuumize in vacum reaction tank after closing all valves；
2) purity oxygen is inculcated into vacum reaction tank, until pressure inside the tank closes oxygen valve when being less than atmospheric pressure；
3) hydrophilic high molecular material aqueous solution, hydrophilic high molecular material aqueous solution and active carbon are added into vacum reaction tank Weight ratio is 2: 1, is added while stirring；PH value is adjusted after stirring 2 hours to 7.0 ± 0.5, is stirred for being uniformly mixed for 1 hour Moist bioactivity charcoal；
4) it unloads loaded on the moist bioactivity charcoal in bucket, after 45 DEG C of drying, is pulverized into powder again, it is living to obtain stemness oxygen carrier Property charcoal.
2. manufacturing method according to claim 1, it is further characterized in that vacuumizing vacuum in rear tank body in the step 1) Degree is less than -0.1kg/cm2。
3. manufacturing method according to claim 1, it is further characterized in that " hydrophilic high molecular material water in the step 3) The concentration of solution " is 0.01%-5%.
4. manufacturing method according to claim 1, it is further characterized in that " hydrophilic high molecular material " includes card wave Nurse hydrogel, alginates, gelatin hydrophilic material.
5. a kind of application of moist bioactivity charcoal, which is characterized in that the moist bioactivity charcoal is by described in claim 1 The production method of bioactivity charcoal is prepared, the moist bioactivity charcoal be added directly into liquid be made skin repair apply Material.
6. a kind of application of moist bioactivity charcoal, which is characterized in that the moist bioactivity charcoal is by described in claim 1 The production method of bioactivity charcoal is prepared, the moist bioactivity charcoal be directly added into semi-solid solution be made gel or Ointment.
7. a kind of application of stemness bioactivity charcoal, which is characterized in that the stemness bioactivity charcoal is by described in claim 1 The production method of bioactivity charcoal is prepared, the stemness bioactivity charcoal and plant fiber, chemical fibre be blended be fabricated to it is medical Application, non-woven fabrics, woven cloths.
CN201610533899.2A 2016-07-03 2016-07-03 A kind of production method of bioactivity charcoal Active CN106075530B (en)

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CN106075530B true CN106075530B (en) 2019-01-22

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8723447D0 (en) * 1987-10-06 1987-11-11 Johnson & Johnson Ltd Wound dressing
ATE327779T1 (en) * 1999-12-30 2006-06-15 Acrymed METHOD AND COMPOSITIONS FOR IMPROVED DELIVERY DEVICES
CN1245544C (en) * 2003-03-13 2006-03-15 解冰 Activated carbon fibre dressing and preparing method thereof
US7014630B2 (en) * 2003-06-18 2006-03-21 Oxyband Technologies, Inc. Tissue dressing having gas reservoir
CN1720801A (en) * 2004-07-12 2006-01-18 深圳市清华源兴生物医药科技有限公司 Silver carried bactericidal active carbon, its preparation process and application
CN1308231C (en) * 2004-07-12 2007-04-04 深圳市清华源兴生物医药科技有限公司 Active carbon loading silver and its preparing method and use
GB2531344A (en) * 2014-10-17 2016-04-20 Brightwake Ltd Composite wound dressing

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Address after: No.756, xiangtian Road, Jinwan District, Zhuhai City, Guangdong Province

Patentee after: ZHUHAI YASHA MEDICAL DEVICES Co.,Ltd.

Address before: Nanping Town Xiangzhou District Guangdong city Zhuhai province 519060 Guang Sheng Industrial Zone No. 45 Guang Sheng Lu four floor

Patentee before: ZHUHAI YASHA MEDICAL DEVICES Co.,Ltd.