EP4232105A1 - Pflasterzubereitung, polymerfilm, sprühpflastersprühvorrichtung, verfahren zur herstellung eines polymerfaservlieses, polymerfaservlies und verwendungen der pflasterzubereitung - Google Patents
Pflasterzubereitung, polymerfilm, sprühpflastersprühvorrichtung, verfahren zur herstellung eines polymerfaservlieses, polymerfaservlies und verwendungen der pflasterzubereitungInfo
- Publication number
- EP4232105A1 EP4232105A1 EP21823564.6A EP21823564A EP4232105A1 EP 4232105 A1 EP4232105 A1 EP 4232105A1 EP 21823564 A EP21823564 A EP 21823564A EP 4232105 A1 EP4232105 A1 EP 4232105A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polymer
- plaster
- spray
- plaster preparation
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- A61L26/00—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form
- A61L26/0061—Use of materials characterised by their function or physical properties
- A61L26/0076—Sprayable compositions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F15/00—Auxiliary appliances for wound dressings; Dispensing containers for dressings or bandages
- A61F15/005—Bandage applicators
-
- 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
- A61L26/00—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form
- A61L26/0009—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form containing macromolecular materials
- A61L26/0019—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form containing macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- A61L26/00—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form
- A61L26/0061—Use of materials characterised by their function or physical properties
- A61L26/0066—Medicaments; Biocides
-
- 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
- A61L26/00—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form
- A61L26/0061—Use of materials characterised by their function or physical properties
- A61L26/009—Materials resorbable by the body
-
- 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
- A61L2300/102—Metals or metal compounds, e.g. salts such as bicarbonates, carbonates, oxides, zeolites, silicates
- A61L2300/104—Silver, e.g. silver sulfadiazine
-
- 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
- A61L2300/106—Halogens or compounds thereof, e.g. iodine, chlorite
-
- 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
- A61L2300/11—Peroxy compounds, peroxides, e.g. hydrogen peroxide
-
- 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
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
- A61L2300/404—Biocides, antimicrobial agents, antiseptic agents
-
- 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
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
- A61L2300/412—Tissue-regenerating or healing or proliferative agents
- A61L2300/414—Growth factors
-
- 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
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
- A61L2300/426—Immunomodulating agents, i.e. cytokines, interleukins, interferons
Definitions
- Plaster preparation polymer film, spray plaster spray device, method for producing a polymer nonwoven fabric, polymer nonwoven fabric and uses of the plaster preparation
- the invention relates to a plaster preparation, a polymer film produced by spraying the plaster preparation, a spray plaster spray device for producing a polymer membrane or a polymer fiber fleece, a method for producing the polymer fiber fleece, a polymer fiber fleece and uses of the plaster preparation.
- Spray plasters comprising polymers based on acrylate, silicone or polyurethane, a solvent such as ethyl acetate and a propellant such as dimethyl ether, hydrocarbons containing fluorine Hydrocarbons, CO2, nitrogen or noble gases are known from the prior art. Disadvantages of such spray plasters include the physiological harmlessness of the polymers, their insufficient flexibility, particularly in the case of thin films, and/or adhesion to skin or wounds, and insufficient water permeability, particularly due to high hydrophobicity.
- EP 0 509 203 A2 aims to provide physiologically harmless polymers that can be used on the skin without the disadvantages of known mono- and copolymers of lactic acid and glycolic acid.
- the known mono- and copolymers are usually applied in solutions and, according to the disclosure of EP 0 509 203 A2, are inherently relatively hard and not very flexible, so that sprayed-on films quickly become brittle and cracked after the solvent has evaporated and only have limited adhesion to the skin or wound surface.
- EP 0 509 203 A2 discloses the use of copolymers of racemic lactide and ⁇ -caprolactone, ⁇ -valerolactone, racemic ⁇ -decalactone or ⁇ -hydroxybutyric acid as an improvement, the copolymers being produced by reacting the monomers in a molar ratio of lactide to reactant of about 95 to 70 to 5 to 30 with the addition of metal carboxylates known per se as initiators at temperatures of about 150° C. for a period of about 16 to 48 hours.
- a solution of a D,L-lactide and s-caprolactone copolymer in a molar ratio of 85 to 15 is disclosed, which can be filled into known pump sprays or aerosol sprays.
- EP 1 077 073 B1 aims to improve resorbable, physiologically harmless copolylactides.
- EP 1 077 073 B1 discloses that use on uninjured skin requires copolylactides with high adherence, flexibility and extensibility.
- Water vapor permeability is according to EP 1 077 073 B1 is a decisive criterion for use on injured skin and, according to EP 1 077 073 B1, cannot be achieved by the copolymers alone, since these are hydrophobic and not very permeable ( ⁇ 60 ml/h/m 2 ).
- EP 1 077 073 B1 discloses copolymers of racemic lactide and the comonomers ⁇ -caprolactone, ⁇ -valerolactone, 1,4-dioxanone-2 or 1,3-dioxanone-2 in a molar ratio of lactide/comonomer of 90-80/10-20 , which were polymerized in the presence of stannous diethylhexanoate as an initiator and a cocatalyst at about 160°C, and a glass transition temperature between 30 and 43°C, a molecular weight Mn from 15,000 to 50,000 and a polydispersity Pn (Mw / Mn) between 1.2 and 2.
- a copolymer of D,L-lactide and 1,3-dioxanone-2 (also known as trimethylene carbonate) prepared in this way is disclosed, as is a copolymer of D,L-lactide and s-caprolactone.
- a low viscosity leads to a sticky consistency, which must lead to adhesions to textiles lying on top (e.g. bandage material).
- copolymers with the same lactide/comonomer ratio with high viscosity are not very flexible, stiff, brittle and have poor adhesion.
- the viscosity of the copolymers according to the invention sought in EP 1 077 073 B1 is between 0.30 and 0.75, preferably between 0.55 and 0.67.
- the object of the invention is to provide a polymer-based plaster preparation which is suitable for the production of both polymer films and polymer fiber fleeces, with a high viscosity of the plaster preparation and a high extensibility of the polymer film or polymer fiber fleece being achieved at a low thickness, with both polymer films and Polymer fiber webs show good adhesion to skin (human or animal, dry or wet) or wounds and where a high water vapor permeability, in particular comparable to the water vapor permeability of the skin (human or animal), is achieved without the need for further additives. Furthermore, a polymer film, a spray plaster spray device, a method for producing a polymer fiber fleece are to be specified.
- the task relating to the plaster preparation is achieved according to the invention by a plaster preparation having the features of claim 1.
- the polymer film according to the invention has the features specified in claim 16.
- the spray plaster spraying device according to the invention is specified in claim 22, the method for producing a polymer fiber fleece is specified in claim 23, the polymer fiber fleece is specified in claim 24.
- Uses are specified according to claims 26 and 27. Advantageous configurations with expedient developments of the invention are specified in the respective dependent claims.
- the plaster preparation comprises at least one resorbable polymer made from at least 3, in particular different, monomers, in particular a polymer comprising monomers selected from the group consisting of trimethylene carbonate, glycolide, lactide, in particular (DL-lactide), p-dioxanone, s-caprolactone and/or Butyrolactone, at least one easily vaporizable organic solvent.
- monomers in particular a polymer comprising monomers selected from the group consisting of trimethylene carbonate, glycolide, lactide, in particular (DL-lactide), p-dioxanone, s-caprolactone and/or Butyrolactone, at least one easily vaporizable organic solvent.
- the plaster preparation is a spray plaster preparation, it preferably comprises at least one propellant.
- the plaster preparation according to the invention permits a high inherent viscosity, a high viscosity for the purposes of the invention meaning a viscosity >0.75 dl/g, generally >1 dl/g. (According to the present application, the viscosity is to be determined with ⁇ g of polymer per 1 ml of chloroform at 25° C.).
- the polymer films and polymer fiber webs that can be produced using the plaster preparation or spray plaster preparation according to the invention show a low thickness (film: 10-50 ⁇ m; fleece: 80-200 ⁇ m) for the Application Sufficient adhesion to skin and wounds, good stretchability (film: 200-1500%; fleece 150-200%), with different strengths (film: 0.4 - 15 N/mm 2 ; fleece: 0.6 - 0. 8 N/mm 2 ) and good water vapor permeability, in particular adapted to the skin (human or animal, dry or wet) (film: 15-80 g/m 2 /h; fleece 80-120 g/m 2 /h).
- the plaster preparation according to the invention can therefore be applied externally very thinly, in particular as a spray plaster preparation.
- the aforementioned adhesion is such that the polymer film or the polymer fleece cannot be detached from its outer application site without being destroyed. Rather, the polymer film or the polymer fleece can only be detached by hand in small shreds. In contrast, when washing/showering and when carefully drying the skin, the polymer film or polymer fleece remains intact and adheres.
- the plaster preparation can also be applied as a pump spray or by means of a brush or the like to the application site (skin/wound) to be treated with a plaster.
- Resorbable polymers within the meaning of the invention are polymers produced by polymerisation of at least three different monomers, with both the polymers and the monomers used being degraded in vivo and in vitro essentially by hydrolysis.
- the polymers and their degradation products are medically safe and non-allergenic.
- the monomers are further metabolized in vivo via the citric acid cycle or via the fatty acid metabolism.
- Suitable polymers contain in particular trimethylene carbonate, glycolide, lactide, in particular D,L-lactide, p-dioxanone, s-caprolactone and/or butyrolactone.
- the absorbable polymer contains trimethylene carbonate, in particular lactide, in particular D,L-lactide, ⁇ -caprolactone and trimethylene carbonate; the terpolymer particularly preferably consists of lactide, in particular D,L-lactide, s-caprolactone and trimethylene carbonate.
- the polymer can preferably consist of 60 to 90% by weight D,L-lactide, 5 to 35% by weight s-caprolactone and 5 to 35% by weight trimethylene carbonate, in particular from 70 to 85% by weight D,L-lactide, 5 to 20% by weight % s-caprolactone and 5 to 20% by weight trimethylene carbonate.
- These compositions are particularly advantageous since amorphous structures are formed which produce elastic and plastic behavior. Thus, the mobility for wound areas covered with the plaster, for example on joints, is maintained.
- the polymer preferably has an inherent viscosity between 0.3 dl/g and 2.5 dl/g, in particular between 0.75-1.6, very particularly preferably between 0.9-1.6 dl/g (viscosity in the present application measured with 1 mg of polymer per 1 ml of chloroform at 25° C.).
- This viscosity has the additional advantage that the resulting film is mechanically sufficiently stable and shows the desired degradation properties.
- the polymer preferably has a monomer content of between 0.5 and 10% by weight, in particular a monomer content of between 3 and 8% by weight. This has the additional advantage that the release of the monomers promotes wound healing and the film exhibits the desired plastic, elastic behavior. The continuous release of the monomers over a longer period of time promotes wound healing (over several days).
- the patch preparation can additionally comprise at least one further absorbable polymer, in particular a poly-s-caprolactone, polylactide, polyglycolide, polyethylene glycol and/or at least one non-absorbable polymer, in particular from the group consisting of Polyacrylates and polyurethanes, the non-resorbable polymers being added in particular as a blend with a preferred proportion of 1-50% based on the terpolymer.
- a further absorbable polymer in particular a poly-s-caprolactone, polylactide, polyglycolide, polyethylene glycol and/or at least one non-absorbable polymer, in particular from the group consisting of Polyacrylates and polyurethanes, the non-resorbable polymers being added in particular as a blend with a preferred proportion of 1-50% based on the terpolymer.
- easily vaporizable organic solvents are organic solvents with an evaporation number (VD) according to DIN 53170 of ⁇ 35, in particular ⁇ 10 /or mixtures thereof, ethyl acetate, methyl acetate and/or acetone being particularly preferred.
- Organic solvents DMSO and N-pyrrolidone are also suitable.
- the resorbable polymer can be dissolved in the organic solvent.
- Propellants within the meaning of the invention are gaseous or gas-evolving compounds by means of which other substances, in particular other liquids and/or gases, are transported and/or atomized.
- suitable propellants are dimethyl ether, methane, ethane, propane, butane, pentane, low-boiling ( ⁇ 50°C) halogenated hydrocarbons, noble gases, air and/or CO2.
- the plaster preparation according to the invention can consist of a composition of 5-25% by weight resorbable polymer of at least 3 (different) monomer units and 75-95% by weight organic solvent.
- the plaster preparation can, in a further embodiment of the invention, consist of a composition of 2.8 to 7% by weight resorbable polymer of at least three (different) monomer units, 31.5 to 65% by weight organic solvent and 30 up to 64% by weight of propellant.
- the plaster preparation can additionally have at least one disinfectant, in particular an antibacterial substance, in particular polyhexanide, phenoxyethanol, iodine, peroxides and/or silver.
- the plaster preparation can have disinfectants with a proportion by weight of 0.05% by weight-5% by weight, in particular 0.1% by weight-2% by weight.
- additives can be cooling, pain-relieving, caring or virucidal.
- the plaster preparation can also contain biologically active additives, such as substances with an antibacterial effect, hemostatic substances, cytokines, growth factors, in particular TGFß, anesthetics and/or biologically inactive additives such as UVA and/or UVB filters, dyes, other polymers, adhesives.
- biologically active additives such as substances with an antibacterial effect, hemostatic substances, cytokines, growth factors, in particular TGFß, anesthetics and/or biologically inactive additives such as UVA and/or UVB filters, dyes, other polymers, adhesives.
- the invention also relates to a polymer film produced by spraying the plaster preparation according to the invention.
- Polymer films produced by means of the plaster preparation according to the invention in particular spray plaster preparation, have a low thickness (10-50 ⁇ m) which is sufficiently good for the application on skin, fur and wounds, good extensibility (200-1000%) and high strength (0.4 - 15 N/mm 2 ) and good water vapor permeability (15 - 80 g/m 2 /h), in particular adapted to the skin.
- Polymer films according to the invention are therefore very comfortable to wear when used on the skin and accelerate wound healing due to the release of lactate.
- the polymer film preferably has a monomer content of ⁇ 10% by weight. This has the additional advantage that the mechanical properties desired for the intended use as a plaster are achieved and no brittleness is found in connection with plastic and elastic behavior.
- the polymer film preferably has a modulus of elasticity between 1.5 and 1000 N/mm 2 , in particular between 1.7 and 450 N/mm 2 . This has the added benefit that the film is not stiff. This promotes sufficient adhesion to the skin.
- the polymer film has an extensibility of between 100 and 1500%, in particular between 250 and 1000%. This has the additional advantage that the material is sufficiently flexible even for body parts that are geometrically difficult to cover, especially in the area of joints.
- the polymer film preferably has a strength of between 0.1 and 30 N/mm 2 , in particular between 1 and 20 N/mm 2 . This has the additional advantage that the material does not tear even when applied close to the joint and during movements.
- the polymer film has a thickness of between 5 and 30 ⁇ m (measured after drying). Polymer films of this thickness are particularly comfortable to wear, and there is also better air and moisture exchange. This promotes wound healing.
- the invention also relates to a spray plaster spraying device for spraying the spray plaster preparation according to the invention, comprising a housing with a spray head for triggering the spraying process, in particular a cylindrical housing with a longitudinal axis.
- the housing comprises a reservoir for the spray plaster preparation and a propellant channel for a propellant of the spray plaster preparation with a diameter d t .
- the propellant channel runs in a first area in the direction of the longitudinal axis in the housing as a riser and extends in a second area in the spray head at an angle radially between the geodetic end face of the riser and a spray opening of the spray head.
- the second area has a diameter d 2 which is smaller than the diameter di of the first area.
- the second area (d2) opens into a mixing area with a diameter d 3 .
- the mixing area adjoins the second area in the radial direction and connects the second area to a spray opening.
- a channel of the reservoir with a diameter runs in the direction of the longitudinal axis and opens into the mixing area and with its diameter d 4 being larger than the diameter d 3 .
- the spray opening has a relaxation area which increases in the shape of an expansion cone and has a maximum diameter d 5 , the relaxation area extending between the mixing area and the spray opening.
- the spray plaster spraying device brings with it the advantage that the spray plaster preparation according to the invention is surprisingly also suitable, by spraying using the spray plaster spraying device, to produce polymer fibers which, as a polymer fiber fleece, are applied to a surface, in particular a skin (human or animal, dry or wet) or wound can be deposited.
- the plaster preparation according to the invention can be applied as a fibrous sheet to a wound, for example a chronic wound, in order to reduce wound pain, reduce the risk of maceration and/or infection in a wound, in particular in the case of a chronic wound.
- the polymeric nonwoven fabric of the present invention may be advantageous for stimulating vascularization in a wound, particularly in a chronic wound, and/or for use in augmenting the epidermis and dermis of a wound.
- the invention also relates to a method for producing a polymer fiber fleece comprising polymer fibers, the spray plaster preparation according to the invention being sprayed using the spray plaster spray device according to the invention, a propellant of the spray plaster preparation being pressed at high speed into a mixing area of a propellant channel, and a polymer made of at least 3 monomers of the spray plaster preparation and a solvent of the spray plaster preparation is transported by means of a channel (from a reservoir) into the mixing area and is mixed with the propellant flowing at high speed and the mixture obtained is transported into a relaxation space of a spray opening, the solvent evaporating on exiting the spray opening wherein polymer fibers are formed, and wherein a polymer fiber web comprising the polymer fibers on a surface, in particular on a human or animal skin surface, especially on a wound.
- the thickness of the polymer fiber fleece to be produced can be selected as required by selecting the spraying time and repeating the spraying process.
- the invention further relates to a polymer fiber fleece produced according to the method according to the invention.
- the polymer fiber fleece according to the invention brings with it the advantage that the fibers can, surprisingly, optimally adapt to the wound bed. In addition, they are almost entirely solvent-free, which means that the fibers can be treated with less pain when sprayed on. Thanks to the fleece structure, wound fluid can also be better absorbed and wound exudate can be transported to the outside, which is particularly advantageous in the case of heavily exuding wounds. In addition, the ventilation of the application site supplied with the polymer fiber fleece can be improved.
- the polymer fiber fleece according to the invention preferably has a water vapor permeability of between 80 and 200 ml/m 2 /h.
- the polymer fiber fleece according to the invention has the advantage that liquid from weeping wounds can be drained off more easily
- the invention also relates to the use of the plaster preparation according to the invention for the topical treatment of human or animal skin, in particular wound treatment of epidermal and dermal wounds, in particular abrasions, cuts, burns and chronic wounds, in particular ulcer wounds, in particular pressure-induced ulcer (decubitus ulcer), arterial ulcer, venous ulcer , mixed arterial-venous ulcer, leg ulcers, arterial leg ulcers, venous leg ulcers, leg ulcers in diabetic foot syndrome and post-traumatic leg ulcers.
- wound treatment of epidermal and dermal wounds in particular abrasions, cuts, burns and chronic wounds
- ulcer wounds in particular pressure-induced ulcer (decubitus ulcer), arterial ulcer, venous ulcer , mixed arterial-venous ulcer, leg ulcers, arterial leg ulcers, venous leg ulcers, leg ulcers in diabetic foot syndrome and post-traumatic leg ulcers.
- the invention also relates to the use of the plaster preparation according to the invention for use in redness of the skin, in particular in sunburn, for sun protection, in cosmetic applications, in particular for camouflage, or as an absorbable adhesive.
- Suitable dyes can be added to the plaster preparation for camouflage purposes.
- standard spray head with the designation "Kosmos” and with the valve PV22210-200149 from Precision Despensing Solutions Europe GmbH was used.
- Dimethyl ether 30% by weight was placed in a pressure can (standard nozzle with a diameter: 0.91 mm) as shown in FIG. 1 and sprayed from a distance of about 10 cm and a pressure of about 5.1 bar (at 20° C.). .
- a transparent polymer film with a thickness of about 12 ⁇ m and a water vapor permeability of about 30 ml/m 2 /h formed. Increasing the spraying time increases the film thickness. With a layer thickness of 40 ⁇ m, the water vapor permeability was about 18 ml/m 2 /h.
- the polymer film When applied to tempered, moist meat, the polymer film was removed with tweezers after about 1 to 2 minutes.
- the polymer film is sufficiently strong for use as a plaster with a low thickness, has good adhesion to skin or wounds and has high water vapor permeability, in particular comparable to the water vapor permeability of the skin, without the need for further additives.
- Ethyl acetate 90 wt% [92 wt%] was placed in a pressure can with a standard nozzle (diameter: 0.91 mm) according to FIG. 1 and sprayed at a distance of about 10 cm and a pressure of about 5 bar compressed air.
- a transparent polymer film with a thickness of approx. 12 ⁇ m [10 ⁇ m] and a water vapor permeability of approx. 25 ml/m 2 /h [40 ml/m 2 /h] is formed.
- the following mechanical values resulted from uniaxial tensile tests:
- the polymer film is sufficiently strong for use as a plaster with a low thickness, has good adhesion to skin or wounds and has high water vapor permeability, in particular comparable to the water vapor permeability of the skin, without the need for further additives.
- Dimethyl ether 55% by weight was placed in a pressure can with a standard nozzle (diameter: 0.91 mm) as shown in FIG. 1 and sprayed at a distance of 10 cm and a pressure of about 5.1 bar (at 20° C.).
- a violet but still transparent polymer film with a thickness of approx. 15 ⁇ m and a Water vapor permeability of approx. 41 ml/m 2 /h.
- the following mechanical values resulted from uniaxial tensile tests:
- the polymer film is sufficiently strong for use as a plaster with a low thickness, has good adhesion to skin or wounds and has high water vapor permeability, in particular comparable to the water vapor permeability of the skin, without the need for further additives.
- Dimethyl ether 65% by weight was placed in a pressure can with a standard nozzle (diameter: 0.91 mm) according to FIG. 1 and at a distance of approx. 10 cm and a pressure of approx. sprayed.
- a transparent polymer film with a thickness of approx. 17 ⁇ m and a water vapor permeability of approx. 62 ml/m 2 /h is formed.
- a very firmly adhering layer also forms on human skin (both dry and wet). Due to the high propellant gas content, many small bubbles form when spraying, but a polymer film forms. The following mechanical values resulted from uniaxial tensile tests:
- the polymer film shows high strength at low thickness, good adhesion to skin or wounds and has high water vapor permeability, in particular comparable to the water vapor permeability of the skin, without the need for further additives.
- Cyanoacrylate 0.045% by weight Ethyl acetate: 41.355% by weight dimethyl ether: 55% by weight was placed in a pressure can with a standard nozzle (diameter: 0.91 mm) according to FIG. 1 and at a distance of approx. 10 cm and a pressure of approx. 5.1 bar (at 20 °C).
- a transparent polymer film forms with a thickness of approx. 14 ⁇ m and a water vapor permeability of approx. 29 ml/m2/h.
- a very firmly adhering layer also forms on human skin (both dry and wet). The following mechanical values resulted from uniaxial tensile tests:
- the polymer film shows high strength at low thickness, good adhesion to skin or wounds and has high water vapor permeability, comparable in particular to the water vapor permeability of the skin without the need for further additives.
- Polymer 16% by weight in acetone: 86% by weight was placed in a pressure can with a spray head according to the invention as shown in FIG. 1 and sprayed from a distance of about 30 cm and an air pressure of about 5 bar.
- Whitish polymer fibers formed with an average thickness of approx. (A) 850 nm (B) 1 pm (C) 2 pm.
- the polymer fibers formed a polymer fiber fleece according to the invention, which was also obtained with a standard nozzle (with a diameter of 0.91 mm) at low pressure (about 1 bar).
- the polymer fiber fleece adheres well to human skin.
- a very firmly adhering polymer fiber fleece also formed on human skin (both dry and wet).
- the polymer fleece (A) had a water vapor permeability of about 111 ml/m 2 /h.
- the following mechanical values resulted from uniaxial tensile tests:
- the polymer fleece shows high strength at a low thickness of 120 ⁇ m, good adhesion to skin or wounds and has high water vapor permeability, comparable in particular to the water vapor permeability of the skin without the need for further additives.
- Polymer 19% by weight in ethyl acetate: 81% by weight was placed in a pressure can with a spray head according to the invention as shown in FIG. 1 and sprayed from a distance of about 30 cm and at an atmospheric pressure of about 8 bar. Whitish fibers formed with an average thickness of approx. (A) 900 nm (B) 1 pm (C) 2.5 pm. A polymer fiber fleece according to the invention was formed. The polymer fiber web adhered to human skin in a manner suitable for use as a patch or skin protector.
- Phenoxyethanol 0.45% by weight
- dimethyl ether 55% by weight was placed in a pressure can with a standard nozzle (0.91 mm) according to FIG. 1 and sprayed at a distance of about 10 cm and a pressure of about 5.1 bar (at 20.degree. C.).
- a transparent polymer film with a thickness of approx. 15 ⁇ m and a water vapor permeability of approx. 37 ml/m 2 /h is formed.
- a very firmly adhering layer also forms on human skin (both dry and wet). Due to the high propellant gas content, many small bubbles form when spraying, but a polymer film forms. The following mechanical values resulted from uniaxial tensile tests:
- the polymer film exhibits very high extensibility at low thickness, good adhesion to skin or wounds and has high water vapor permeability, in particular comparable to the water vapor permeability of the skin, without the need for further additives.
- FIG. 1 schematically shows the structure of a plaster spraying device according to an embodiment
- FIG. 2 shows photographs of polymer fibers of a polymer fiber fleece produced according to Example 5, the polymer fibers being produced from plaster preparations (A) and (C) by spraying using a plaster spray device according to the invention;
- FIG. 3 shows scanning electron micrographs of polymer fibers of a polymer fiber fleece produced from plaster preparations (A), (B) and (C) according to example 5 using the plaster spray device according to FIG. 1; 4 shows scanning electron micrographs of polymer fiber webs according to Example 6, which were produced using a spray fiber spraying device according to the invention.
- FIG. 1 schematically shows the structure of a pressurized spray plaster spray device 10 for spraying a plaster preparation according to the invention, in particular for producing a polymer fiber fleece according to the invention of the plaster preparation by a method according to the invention for producing the polymer fiber fleece.
- the spray plaster spraying device 10 comprises a housing 12 with a movably arranged spray head 14 for triggering the spraying process.
- the housing 12 can in particular be cylindrical or have a different shape.
- the housing 12 has a longitudinal axis L and comprises a reservoir 16 for the plaster preparation, a propellant channel 18 for a propellant T of the plaster preparation.
- the propellant channel 18 runs in a first area 20 in the direction of the longitudinal axis L in the housing as a riser pipe 22 and extends in a second area 24 in the spray head 14 at an angle in a radial direction between the geodetic end face of the riser pipe 22 and a spray opening 26 of the spray head 14.
- the first area 20 has an inside diameter di.
- the second area 24 has an inside diameter d 2 which is smaller than the diameter di of the first area 20 .
- the second area 24 opens into a mixing area 28 with a diameter d 3 , which is preferably smaller than or equal to the diameter d 2 .
- the mixing area 28 adjoins the second area 24 in a radial direction and fluidically connects the second area 24 to the spray opening 26 .
- a channel 30 of the reservoir 16 with a diameter d4 runs in the axial direction and opens into the mixing area 28.
- the diameter d 4 is larger here than the diameter d 3 and the diameter d 2 .
- Actuating the spray head creates a fluidic connection between the propellant T stored in the housing 12 and the spray opening 26 .
- the remainder of the patch preparation disposed within the housing 12 is drawn into the mixing region 28 by subatmospheric suction mediated by the outflowing propellant.
- the spray opening 26 has a relaxation area 32 that widens in the shape of an expansion cone, which extends in a direction radial to the longitudinal axis L between the mixing area 28 and the spray opening 26 .
- FIG. 2 shows photographs of a polymer fiber fleece 100 comprising a multiplicity of polymer fibers 102 which were produced according to Example 5 explained above.
- the polymer fibers 102 were made by spraying plaster preparations
- FIG. 3 shows scanning electron micrographs of polymer fiber webs 100 each comprising polymer fibers 102 produced according to example 5.
- the polymer fibers 102 were produced by spraying the plaster preparations A, B and C using the spray fiber spray device 10 according to FIG.
- the figure on the left shows polymer fibers 102 made from plaster preparation A.
- the figure in the middle shows polymer fibers 102 from plaster preparation B and the figure on the right shows polymer fibers 102 from plaster preparation C. All images are on a scale of 50 ⁇ m, ie a 1 cm section in the figure corresponds 50 pm in kind.
- the polymer fibers 102 exhibit a form fit typical of nonwoven fabrics as a fabric by entanglement, cohesion and/or adhesion.
- FIG. 4 shows scanning electron micrographs of polymer fiber webs 100 according to example 6 explained above, which were produced by means of a spray fiber spray device 10 according to the invention according to FIG.
- the scale corresponds to 50 pm.
- the polymer solutions were each sprayed at an internal pressure of the spray fiber spray device 10 of approximately 8 bar.
- the polymer concentrations were varied.
- Figure A shows a polymer fiber fleece 100 of solution A
- Figure B shows a polymer fiber fleece 100 of solution B
- Figure C shows a polymer fiber fleece 100 of solution C.
- the polymer fibers 102 or polymer fiber fleece 100 show sufficient adhesion on human skin even for wound closure.
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Materials For Medical Uses (AREA)
- Medicinal Preparation (AREA)
- Cosmetics (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020215294.2A DE102020215294A1 (de) | 2020-12-03 | 2020-12-03 | Pflasterzubereitung, Polymerfilm, Sprühpflastersprühvorrichtung, Verfahren zur Herstellung eines Polymerfaservlieses, Polymerfaservlies und Verwendungen der Pflasterzubereitung |
| PCT/EP2021/084217 WO2022117842A1 (de) | 2020-12-03 | 2021-12-03 | Pflasterzubereitung, polymerfilm, sprühpflastersprühvorrichtung, verfahren zur herstellung eines polymerfaservlieses, polymerfaservlies und verwendungen der pflasterzubereitung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4232105A1 true EP4232105A1 (de) | 2023-08-30 |
Family
ID=78829766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21823564.6A Pending EP4232105A1 (de) | 2020-12-03 | 2021-12-03 | Pflasterzubereitung, polymerfilm, sprühpflastersprühvorrichtung, verfahren zur herstellung eines polymerfaservlieses, polymerfaservlies und verwendungen der pflasterzubereitung |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20230302193A1 (de) |
| EP (1) | EP4232105A1 (de) |
| JP (1) | JP7823662B2 (de) |
| KR (1) | KR20230116854A (de) |
| DE (1) | DE102020215294A1 (de) |
| MX (1) | MX2023006610A (de) |
| PE (1) | PE20241218A1 (de) |
| WO (1) | WO2022117842A1 (de) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3755558A (en) * | 1971-02-23 | 1973-08-28 | Du Pont | Polylactide drug mixtures for topical application atelet aggregation |
| EP0509203A3 (en) | 1991-04-17 | 1993-04-14 | Christian Dr. Med. Juergens | Resorbable, physiologically acceptable copolymers and their use |
| DE4229924C2 (de) * | 1991-04-17 | 1995-12-07 | Juergens Christian Dr Med | Verwendung von resorbierbaren Lactidcopolymeren |
| EP0560014A1 (de) * | 1992-03-12 | 1993-09-15 | Atrix Laboratories, Inc. | Biologisch abbaubarer Wundverband in Form eines Sprühfilms und Verfahren zu seiner Herstellung |
| DE59910844D1 (de) | 1999-08-18 | 2004-11-18 | Juergens Christian | Resorbierbare Copolylactide und ihre Verwendung |
| DE10041684A1 (de) * | 2000-08-24 | 2002-03-07 | Inst Textil & Faserforschung | Beschichtungsmaterial zur medizinischen Behandlung aus resorbierbarem synthetischem Material, Verfahren zu seiner Herstellung und Verwendung in der Medizin |
| DE102005042707A1 (de) * | 2005-09-01 | 2007-03-08 | Polymedics Innovations Gmbh | Formkörper zur medizinischen Behandlung von Wunden |
| US20090324713A1 (en) | 2008-06-30 | 2009-12-31 | Ulman John T | Spray-on, non-woven fabric system and multilayer wound coverings |
| US8828425B2 (en) | 2010-02-02 | 2014-09-09 | Poly-Med, Inc. | In situ-formed bioactive tissue adherent films of absorbable crystallizable polymers |
| BR112014007522A2 (pt) | 2011-09-30 | 2017-04-25 | 3M Innovative Properties Co | "composição de revestimento conformável e filme conformável" |
| DE102014211356A1 (de) | 2014-06-13 | 2015-12-17 | Polymedics Innovations Gmbh | Wundkontaktmaterial zur Anwendung bei der Behandlung und/oder Versorgung von Wunden |
| WO2018112054A1 (en) | 2016-12-13 | 2018-06-21 | Nanometics Llc | Pump spray or pressurized aerosol device with applicator arm |
-
2020
- 2020-12-03 DE DE102020215294.2A patent/DE102020215294A1/de active Pending
-
2021
- 2021-12-03 EP EP21823564.6A patent/EP4232105A1/de active Pending
- 2021-12-03 JP JP2023533884A patent/JP7823662B2/ja active Active
- 2021-12-03 PE PE2023001801A patent/PE20241218A1/es unknown
- 2021-12-03 WO PCT/EP2021/084217 patent/WO2022117842A1/de not_active Ceased
- 2021-12-03 MX MX2023006610A patent/MX2023006610A/es unknown
- 2021-12-03 KR KR1020237021770A patent/KR20230116854A/ko active Pending
-
2023
- 2023-06-01 US US18/327,302 patent/US20230302193A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102020215294A1 (de) | 2022-06-23 |
| JP2023551570A (ja) | 2023-12-08 |
| JP7823662B2 (ja) | 2026-03-04 |
| WO2022117842A1 (de) | 2022-06-09 |
| US20230302193A1 (en) | 2023-09-28 |
| PE20241218A1 (es) | 2024-06-11 |
| MX2023006610A (es) | 2023-06-19 |
| KR20230116854A (ko) | 2023-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69211739T2 (de) | Klebrige saugfähige Wundverbände und daraus erzeugte Produkte | |
| DE69221482T2 (de) | Wundenabdeckmaterial | |
| EP1654013B1 (de) | Antimikrobiell ausgerüstete materialien | |
| DE10318801A1 (de) | Flächiges Implantat und seine Verwendung in der Chirurgie | |
| DE202015009503U1 (de) | Haftender Folienverband für medizinische Kompression | |
| EP1181941B1 (de) | Beschichtungsmaterial für die Medizin aus resorbierbarem Material, Verfahren zu seiner Herstellung und Bereitstellung für die Medizin | |
| KR20120014172A (ko) | 수용성 감압 접착제 | |
| EP2812037B1 (de) | Biodegradierbares vlies für medizinische zwecke | |
| DE2409475A1 (de) | Nichtbrennender wundverband | |
| DE3936191C2 (de) | Neue Copolymere aus Milchsäure und Weinsäure, ihre Herstellung sowie ihre Verwendung | |
| DE69029969T2 (de) | Kunsthaut | |
| DE19825499C2 (de) | Wirkstoffhaltige Pflaster | |
| DE602005006387T2 (de) | Medizinische polyurethanschaumstoffe | |
| EP1077073B1 (de) | Resorbierbare Copolylactide und ihre Verwendung | |
| DE4439994A1 (de) | Wasseraushärtbarer Stützverband | |
| EP1395250A1 (de) | Oberflächendotierte wirkstoffhaltige pflaster | |
| DE10128685A1 (de) | Selbstklebendes, wirkstoffhaltiges Matrixpflaster auf Basis von Polyurethangelen | |
| DE4112489C2 (de) | Verwendung von resorbierbaren, physiologisch unbedenklichen Copolymeren für die topische Behandlung menschlicher oder tierischer Haut | |
| DE2924042C2 (de) | Filmbildende, versprühbare Polymerisatlösung zur Herstellung eines Wundverbandes | |
| WO2010031862A9 (de) | Verwendung von lyocellfasern sowie lyocellfasern enthaltenden artikeln | |
| WO2022117842A1 (de) | Pflasterzubereitung, polymerfilm, sprühpflastersprühvorrichtung, verfahren zur herstellung eines polymerfaservlieses, polymerfaservlies und verwendungen der pflasterzubereitung | |
| EP0782865B1 (de) | Verwendung von Lactidpolymeren zur Adhäsionsprophylaxe | |
| EP2462874A1 (de) | Medizinisches Instrument für mikroinvasive Anwendungen | |
| WO2007025729A2 (de) | Formkörper zur medizinischen behandlung von wunden | |
| DE10224420C1 (de) | Feucht klebender Wundverband |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20230526 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20240730 |