EP3959946A2 - Device for treating textiles with a physical plasma - Google Patents
Device for treating textiles with a physical plasmaInfo
- Publication number
- EP3959946A2 EP3959946A2 EP20721171.5A EP20721171A EP3959946A2 EP 3959946 A2 EP3959946 A2 EP 3959946A2 EP 20721171 A EP20721171 A EP 20721171A EP 3959946 A2 EP3959946 A2 EP 3959946A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrodes
- roller
- textiles
- high voltage
- designed
- 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
- 239000004753 textile Substances 0.000 title claims abstract description 91
- 239000003989 dielectric material Substances 0.000 claims abstract description 13
- 238000010409 ironing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 5
- 229920002379 silicone rubber Polymers 0.000 claims description 5
- 239000000806 elastomer Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000002441 reversible effect Effects 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- 244000043261 Hevea brasiliensis Species 0.000 claims description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 2
- 229920003052 natural elastomer Polymers 0.000 claims description 2
- 229920001194 natural rubber Polymers 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 31
- 239000000463 material Substances 0.000 description 15
- 241000894006 Bacteria Species 0.000 description 6
- 235000019645 odor Nutrition 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920003043 Cellulose fiber Polymers 0.000 description 3
- 238000009832 plasma treatment Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000002784 hot electron Substances 0.000 description 2
- 230000002147 killing effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000000415 inactivating effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F61/00—Ironing machines using two or more co-operating pressing rollers
- D06F61/02—Ironing machines using two or more co-operating pressing rollers with two rollers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
- H05H1/2431—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes using cylindrical electrodes, e.g. rotary drums
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H2242/00—Auxiliary systems
- H05H2242/20—Power circuits
- H05H2242/24—Radiofrequency or microwave generators
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H2245/00—Applications of plasma devices
- H05H2245/30—Medical applications
- H05H2245/36—Sterilisation of objects, liquids, volumes or surfaces
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H2245/00—Applications of plasma devices
- H05H2245/40—Surface treatments
Definitions
- the invention relates to a device for treating textiles with a physical plasma with two roller-shaped electrodes, which are rotatably mounted about their roller axes, each having an electrically conductive core and a roller jacket surrounding the core made of a dielectric and their roller jackets are opposite each other in such a way that both roller shells rest against the textiles to be treated when the device is in operation, and with an alternating high voltage generator, the two outputs of which are connected to the electrically conductive cores of the two electrodes during operation of the device and which is designed to transmit an alternating high voltage between to generate the two electrodes, which causes a dielectrically hindered gas discharge between the two electrodes at atmospheric pressure.
- a device for treating textiles with a physical plasma which has the features specified above according to the preamble of independent patent claim 1 is known from US 2009/0120782 A1.
- a discharge chamber formed around a roller gap between the two roller-shaped electrodes is delimited by a pressure roller arranged in front of and behind the roller gap, the roller axis of which runs parallel to the roller axes of the electrodes and which is in contact with one electrode while it is in operation known device in front of or behind the roller gap between the two electrodes forms a further roller gap opposite the other electrode.
- the support Rollers can have a conductive or non-conductive core which is enclosed by a roll jacket made of a non-conductive, resilient material, such as, for example, a suitable high-temperature rubber material, for example silicone rubber.
- the support rollers can be driven or freely rotatable.
- the dielectric of the roller jacket of the two electrodes, between which the dielectrically impeded gas discharge is produced consists of a heat-resistant dielectric material, such as a suitable ceramic.
- the one roller-shaped electrode can be moved together with the pressure rollers with actuators, such as pneumatic cylinders, against the other roller-shaped electrode in order to adjust the roller gap between the electrodes to a size that is adapted to the thickness of the textiles to be treated.
- the known device is only suitable for treating textiles if they are in the form of endless web material.
- a device for plasma treatment of a surface of an object is known from WO 2013/156352 A2, which has a roller-shaped electrode and an alternating high voltage source for applying an alternating high voltage to the electrode in order to generate a dielectrically impeded gas discharge.
- the cylindrical electrode With its convex surface, the cylindrical electrode can be approached to the surface of the object in such a way that at least one plasma area is formed in the vicinity of a contact area between the surfaces, in which a dielectrically impeded gas discharge occurs between the surfaces when the alternating high voltage is applied to the electrode trains.
- the electrode has an electrically conductive core and a roller jacket made of a dielectric which surrounds the core. The surface of the electrode can be elastically deformable and thus adapt to the surface of the object in the contact area.
- the known device is designed in particular as a battery-operated or accumulator-operated handheld device with a handle for moving the electrode relative to the object.
- the handle is attached to a housing made of electrically insulating material in which the electrode is mounted freely rotatable about its roller axis and over which the electrode protrudes at least so far that it can come into contact with the object.
- a method for inactivating odor-relevant molecules by generating a plasma is known from DE 10 2011 100 751 A1, in which hot electrons from the plasma are intended to act on the molecules to be inactivated.
- An apparatus for carrying out the known method has a housing, a plasma source assigned to the housing and a spacer, which maintains a distance between the plasma source and a surface to be treated, in which molecules attached to the surface to be treated are inactivated by the hot electrons of the plasma.
- the surface of the plasma source can be designed to be flexible or elastic.
- the known method and the known device can be used to remove unpleasant odors from clothing.
- DE 197 31 562 A1 discloses a device for treating the inner surface of porous, gas-permeable, moving webs, such as textiles, plastic foams, fleeces, felts, membranes or the like, by means of an electrical charge in the normal pressure range, which also has the features of the generic term independent claim 1 has.
- the web to be treated is introduced into a closed, sealed treatment housing.
- the web is loaded with working gas in the treatment housing.
- the treatment gap between at least two opposite treatment electrodes coated with dielectric is used to generate electrical barrier discharges in the range of atmospheres.
- This treatment gap is set in such a way that the web rests on the two mutually facing surfaces of the treatment electrodes, that is to say completely fills the gap.
- the treated web is purged of the working gas and reaction products and led out of the treatment housing.
- the treatment electrodes are designed as rollers that are coated with a dielectric, specifically with an electrically solid dielectric material.
- a device for the corona treatment of material webs which comprises a carrier electrode which carries the material web to be treated, as well as a corona electrode mounted in a holder.
- the cross section of the corona electrode is approximately circular, and the corona electrode is rotatably mounted on an axis of the holder and is partially encompassed and supported on the outside by arcuate retaining clips. If the discharge line in use is damaged, a fully effective discharge line can be brought back into operation by briefly turning the corona electrode. In contrast, the corona electrode is not designed as a roller which can be rotated during operation of the known device.
- the carrier electrode in the form of a roller is provided with a dielectric, over which the material web to be treated is guided.
- the corona electrode is also equipped with an electrics made of a carbon-free elastomer.
- the corona electrode is with the formation of an electrode gap opposite that of the material web to be treated arranged carrying carrier electrode.
- a corona discharge occurs in the electrode gap when a high-frequency high voltage is applied to the corona electrode using a high-voltage generator while the carrier electrode is connected to ground.
- the holder for the corona electrode is provided with sealing end pieces at its treatment ends opposite the carrier electrode, which serve to protect against contact.
- a method for the production of products comprising cellulose fibers in which a web-shaped material is unwound from an unwinding device, which is then passed through a plasma-generating device, the surface properties of the cellulose fibers being modified by means of a reactive gas.
- the modification of the cellulose fibers is carried out at atmospheric pressure.
- a device generating plasma works on the principle of a barrier discharge.
- the material web is guided between two electrodes, one of the two electrodes being designed as a roller and being provided with a dielectric coating.
- the counter electrode is also designed as a roller.
- the distance between the two electrodes is 1 mm to 15 mm.
- the plasma discharge is pulsed intermittently.
- DE 10 2015 108 884 A1 discloses a device for plasma treatment of an object, in particular a band-shaped object, with an electrode and a counter-electrode made of electrical material, with an alternating high-voltage generator for producing an alternating high-voltage between the electrode and the counter-electrode and with a dielectric barrier that is equipped with a gas discharge caused by the alternating high voltage is connected in series in order to dielectrically impede the gas discharge.
- the electrode and the counter electrode are arranged next to one another in a contact jacket, which has a roller rotatably mounted about a roller axis for contacting the object to be treated and whose material forms the dielectric barrier.
- DE 10 2013 000 440 A1 discloses a plasma treatment device for treating a surface with a dielectrically impeded plasma field which is generated between an electrode supplied with high voltage and the surface.
- the electrode with a dielectric surrounding the electrode forms a roller that is rotatably mounted in a handle housing and can be rolled on the surface.
- the roller is designed to be flexibly adaptable to unevenness of the surface and has a rolling surface with elevations, between which there are spaces that form the plasma field.
- the dielectric is formed from a flexible plastic.
- the electrode itself can also be designed to be flexible.
- an ironing machine with two spring-loaded ironing rollers is known, one of which is heatable.
- the ironing machine also has a device for spraying finely atomized water onto the heated ironing roller.
- the invention is based on the object of showing a device for treating textiles with a physical plasma, which is suitable for the full-surface treatment of clothing and other textiles of more complex shape in order to kill bacteria contained in the textiles.
- Claim 17 relates to an automatic ironing machine with a device according to the invention.
- roller-shaped electrodes which are rotatably mounted about their roller axes, each having an electrically conductive core and a roller jacket made of a dielectric that surrounds the core and the roller jackets of which are opposite one another in such a way that Both roller shells are in contact with the textiles to be treated when the device is in operation, and with an alternating high voltage generator whose two outputs are connected to the electrically conductive cores of the two electrodes when the device is in operation and which is designed to generate an alternating high voltage between the two electrodes, which causes a dielectrically contained gas discharge between the two electrodes at atmospheric pressure
- the roller jacket of at least one of the two electrodes is at least 2 mm thick and made of an elastically deformable dielectric material and the two electrodes for direct insertion of the textiles between the two electrodes are freely accessible when the device is in operation.
- the device according to the invention for treating even small textiles of non-uniform thickness is upgraded to kill bacteria contained in the textiles with the aid of the physical plasma produced by the dielectrically impeded gas discharge or the reactive species contained therein.
- the textiles are freed from unpleasant odors because odor molecules are dissociated.
- both electrodes are roller-shaped and, moreover, have further matching features, does not mean that the two electrodes have to be of identical or even identical design overall. However, they typically have the same length in the direction of their roller axes.
- this matching length or, if the electrodes are not of the same length, the length of the shorter electrode is meant, which limits the length of the area of the smallest distance between the roller shells of the two electrodes in which the The roller shells of the two electrodes are opposite one another.
- roller-shaped electrodes each have an electrically conductive core and a roller jacket made of a dielectric which surrounds the core means that electrically conductive material is arranged under the roller jacket of typically uniform thickness over the essential roller circumference of the respective electrode, to which the respective output of the alternating high voltage generator is connected Operation of the device is connected.
- the electrically conductive core of the respective electrode does not have to be solid or continuous in the circumferential direction around the roller axis or along the roller axis.
- a segmentation of the electrically conductive core of the respective electrode in the circumferential direction can be used, for example, to apply the alternating high voltage of the alternating high voltage generator to the respective electrode only in the area of the smallest distance between the two roller shells.
- a segmentation of the electrically conductive core of the respective electrode in the direction along the roller axis can be used to maintain the dielectrically hindered gas discharge caused by the applied alternating high voltage over different materials between the electrodes over the entire length of the electrodes and to make it as uniform as possible.
- the fact that the roller shells of the two electrodes are opposite one another implies that the roller axes of the two electrodes are aligned parallel to one another and that both electrodes are at the same height in the direction along the roller axes or overlap as completely as possible. In a basic position in which there are no textiles to be treated between them, the roller shells can lie directly against one another or form a roller gap.
- the height of this roller gap should not be greater than the minimum thickness of the textiles to be treated, so that the electrodes rest against the textiles introduced between the two electrodes.
- the roller gap is preferably even smaller than the minimum thickness of the textiles or the two electrodes are acted upon each other after the textiles have been inserted between them in order to reduce the roller gap in order to rest securely against the textiles to be treated.
- This secure contact of the electrodes on the textiles to be treated is made possible in particular by the fact that the roller jacket of at least one of the two electrodes is made of an elastically deformable dielectric material with a thickness of at least 2 mm.
- the outer circumference of the at least one of the two electrodes can thus be deformed in order to adapt to different thicknesses of the textiles to be treated.
- non-compressible components of the textiles such as zippers or buttons, can pass between the two electrodes without the distance between the two electrodes having to be adapted over their entire length to the only locally increased thickness of the textiles, whereby the direct contact of the electrodes would essentially be lost with the textiles.
- the alternating high voltage generated by the alternating high voltage generator causes the dielectrically impeded gas discharge at atmospheric pressure between the two electrodes on the surfaces of the textiles to be treated.
- These surfaces of the textiles include not only the outer, but also the inner surfaces of the textiles, which are exposed to gas, i. H. especially air. Bacteria adhering to all these surfaces are killed by the plasma produced in the gas discharge or the reactive species contained therein and odor molecules are destroyed.
- That the electrodes in the device according to the invention for direct insertion of the textiles between the two electrodes are freely accessible during operation of the device means that the textiles can be manually fed to the area of the smallest distance between the two electrodes by an operator of the device so that the textiles get between the two electrodes. This is a prerequisite, particularly in the case of textiles with small pieces and irregular shapes, in order to be able to treat them with the device according to the invention.
- the roller jacket of the at least one of the two electrodes made of the elastically deformable dielectric material is preferably at least 4 mm thick. In this way, an even higher deformability of the roll shell is achieved.
- an even higher deformability of the roll shell can be achieved in that the electrically conductive core of the at least one electrode is designed to be deformable, for example by being made of a metal fabric that is embedded in the deformable dielectric material of the roll shell.
- the electrically conductive core can have its own elasticity or can be reshaped by the elasticity of the elastically deformable material of the roll shell.
- both roller jackets of both roller-shaped electrodes can also be designed to be elastically deformable. As a rule, this is preferred in order to ensure that the electrodes are particularly adaptable to a varying thickness of the textiles to be treated.
- a suitable elastic, deformable material for the roll jacket of at least one of the two electrodes typically has a modulus of elasticity in the range from 0.3 to 30 MPa or a Shore hardness in the range from 10 to 70 Shore A.
- an elastomer is particularly suitable as the dielectric material for the roll jacket. This can be a natural rubber, a silicone rubber, a silicone elastomer or another elastomer which has the desired dielectric properties and is sufficiently inert to the reactive conditions in the physical plasma generated by the gas discharge.
- an application device is preferably provided which defines the roller axes of the two electrodes Force is applied towards each other, so that the two roller axes approach one another until a corresponding reaction force is built up between the roller shells of the electrodes through elastic deformation. This allows the distance between the two roll axes and also one between the roll shells for recording Adjust the roller gap remaining in the textiles to the respective textiles.
- the force applied by the loading device between the electrodes can be from 10,000 to 50,000 N / m based on the length of the electrodes.
- the application device can apply this force, for example, with a mass as weight force and / or with a spring as spring force and / or pneumatically.
- the device according to the invention will regularly have a rotary drive in order to drive at least one of the two electrodes around its roller axis. It can also be favorable that the rotary drive drives both electrodes synchronously in such a way that their circumferential speeds in the area of their smallest distance match in terms of amount and direction.
- its rotary drive is reversible with respect to its direction of rotation. This also enables the textiles to be moved back and forth between the electrodes for continuous treatment with the physical plasma.
- the device according to the invention can furthermore have a heater in order to heat the roller jacket of at least one of the two electrodes and / or another component of the device that comes into contact with the textiles and / or the textiles themselves.
- This warming can support the germicidal effect of the plasma.
- This support can be of a direct nature in the case of temperature-sensitive germs or it can also lead to the evaporation of moisture from the textiles.
- the plasma is formed by gas discharge in a gas with increased water content so that the plasma has a high content of reactive species.
- the heater should therefore have a temperature sensor and be designed to regulate the roller jacket of at least one of the two electrodes and / or the other component of the device that comes into contact with the textiles and / or the textiles to a temperature of not more than 105 ° C to warm up.
- the heating is preferably limited to 30 to 40 ° C. Such relatively low temperatures do not damage textiles made of synthetic fibers, from which many functional materials for sports and medical articles are made. In addition, these limited temperatures prevent burns when operators of the device come into contact with the respective component of the device or the heated textiles.
- the device according to the invention can have a moistening device in order to moisten the textiles with water vapor and / or water droplets before they enter the area of the smallest distance between the two electrodes or within this area.
- the physical plasma then forms due to the gas discharge in a gas enriched with water and accordingly has many highly reactive species. This also increases the killing effect on the bacteria contained in the textiles.
- the textiles in the device according to the invention are preferably only moistened in such a way that they have a residual moisture level that is sufficiently low for storage either immediately after their treatment or after brief ventilation.
- the device according to the invention can be operated in such a way that the reactive species in the plasma do not spread far beyond the region of the smallest distance between the two electrodes because they react or recombine beforehand.
- a suction device can be provided which has a suction opening adjacent to the area of the smallest distance between the two electrodes and extending over the length of the two electrodes, wherein this suction opening can also be subdivided into spaced apart partial openings.
- the gas sucked off through the suction opening can, for example, be passed through an ozone filter or another suitable filter which breaks down or retains reactive species as completely as possible.
- the alternating high voltage generator of the device according to the invention is designed in particular to produce the alternating high voltage symmetrically to the electrical earth between the two electrodes.
- the polarity of the electrodes can remain the same or alternate.
- a textile support device of the device can be arranged adjacent to the area of the smallest distance between the two electrodes, which is electrically grounded and at a distance from the area of the smallest distance between the two electrodes having conductive surface area. The distance between this surface area and the area of the smallest distance between the two electrodes should be so great that a gas discharge between each of the electrodes and this surface area is prevented.
- the alternating high voltage generator of the device according to the invention can generate the alternating high voltage as a sinusoidal alternating high voltage or in the form of alternating voltage pulses or as a pulsed direct voltage.
- There is a period or Pulse length preferably in a range from 1 / 3,000,000 s to 1 / 200,000 s, which results in relatively steep voltage increases, even if the pulse repetition frequency is much smaller than the range between the corresponding reciprocal values of 3 MHz and 200 kHz.
- a pulse-pause ratio of such an alternating high voltage should be set so that no thermal stress on the textiles is to be expected.
- the amplitude of the alternating high voltage must be adjusted so that it is sufficient for the specified period durations or pulse lengths not only to cause any dielectrically hindered gas discharge between the electrodes, but also one with an electron energy of at least 4.5 eV, i.e. at least about 5 eV .
- This electron energy ensures that atomic oxygen is generated as effectively as possible as a reactive species of the plasma.
- the amplitude of the alternating high voltage required for the electron energy of at least 4.5 eV depends on the geometric arrangement of the electrodes and the resulting electric field and also the composition of the gas in which the gas discharge is caused, because this determines the free path lengths , via which the electrons can be accelerated to the maximum.
- the absolute amplitude of the alternating high voltage can be in the range from 1 to 40 kV.
- the alternating high voltage generator is designed to stochastically vary the pulse intervals of the alternating voltage pulses or the pulsed direct voltage. This prevents undesired sound radiation from the device according to the invention at pulse repetition frequencies in the audible range.
- the diameter of each of the two roller-shaped electrodes can be in the range from 0.02 to 0.4 m.
- the length of the two roller-shaped electrodes can be from 0.4 to 3.2 m.
- the device according to the invention can be designed as an automatic ironing machine for textiles, which is also suitable for ironing textiles made of sensitive synthetic fibers. It proves to be advantageous that when the textiles are passed through between the two electrodes, a force which extends the textiles does not necessarily occur in the main plane of extension of the textiles, which stresses the textiles heavily. However, this does not rule out that the automatic ironing machine according to the invention is used in the manner of a defect for smoothing the textiles.
- FIG. 1 is a schematic representation of a first embodiment of the device with an application device.
- FIG. 2 is a schematic representation of a second embodiment of the device with a heater, a humidifier, a suction device and textile support devices;
- FIG. 3 is a schematic illustration of a further embodiment of the device with a heater and a rotary drive which is reversible in its direction of rotation.
- the device 1 shown in FIG. 1 has two roller-shaped electrodes 2 and 3, which are rotatably mounted about roller axes 4 and 5 running parallel to one another.
- the electrodes each comprise an electrically conductive core 6 or 7 and a roller jacket 8 or 9 that closes the core 6 or 7.
- the roller jackets consist of an elastically deformable dielectric material 10, and they are each about 4 mm thick.
- the roller shells 8 and 9, that is to say the electrodes 2 and 3 on their outer circumferences are deformable. 1
- the upper electrode 2 is applied with a defined force in the direction of the distance between the roller axes 4 and 5 to the lower electrode 3, which is fixedly mounted here with respect to its roller axis 5.
- This force can also be smaller than the weight of the electrode 2, so that the loading device 11 actually compensates for part of the weight of the electrode 2.
- an alternating high voltage generator 12 the two outputs 13 and 14 of which are connected to the cores 6 and 7 of the electrodes 2 and 3, an alternating high voltage which is symmetrical with respect to the electrical earth is produced between the electrodes 2 and 3.
- This alternating high voltage causes a gas discharge 16 dielectrically impeded by the material 10 in the region 15 of the smallest distance between the two electrodes 2 and 3 so that a physical plasma 17 arises in the area of the gas discharge 16.
- the device 1 is provided to treat textiles 18 with this physical plasma 17.
- the two electrodes 2 and 3 or the area 15 of their smallest distance for direct insertion of the textiles 18 between the two electrodes 2 and 3 are freely accessible to operators of the device 1.
- the elasticity of the roller shells 8 and 9 ensures that the electrodes 2 and 3 rest on the textiles 18 over the entire width of the textiles passed between them.
- the gas discharge 16 is thus formed over the inner and outer surfaces of the textiles 18, and the reactive species contained in the plasma 17 kill bacteria present on these surfaces. This takes place at atmospheric pressure and at temperatures which are only so slightly increased compared to room temperature that temperature-sensitive textiles 18 can also be treated with the plasma 17.
- roller jackets 8 and 9 also allows textiles with zip fasteners and / or buttons to be passed through between the roller-shaped electrodes 2 and 3 for treatment with the plasma 17.
- an additional heater 19 is indicated for the roller shells 8 and 9 in order to increase this, for example, to such a temperature that the textiles 18 contacted by the roller shells are heated to just below 40 ° C.
- the heater 19 is shown here in such a way that it forms part of the core 6 or 7 of the respective electrode 2 or 3.
- the heater 19 can be designed as a resistance heater through which a direct or alternating current flows.
- FIG. 2 shows a humidifying device 20 which humidifies the textiles 18 before they enter the region 15 of the smallest distance between the electrodes 2 and 3 in which the plasma 17 is formed.
- the gas in which the gas discharge 16 is produced is enriched with water in order to generate certain reactive species in the plasma 17.
- FIG. 2 shows textile support devices 22 for the textiles 18 in front of and behind the area 15, which have electrically conductive surface areas 24 at a distance from the area 15 and connected to the electrical earth 23.
- This in addition to the symmetrical design of the alternating high voltage with the alternating high voltage generator 12 with respect to the electrical earth 23, is a charging of the Textiles 18 with respect to the electrical earth 23 are prevented or any charging is discharged.
- FIG. 3 shows another embodiment of the heater 19 with infrared radiators 25 which are controlled by a heating control 26 as a function of the temperature signal from a temperature sensor 27. Furthermore, FIG. 3 shows a rotary drive 28 which, via a synchronization gear 29, drives both roller-shaped electrodes 2 and 3 about their roller axes 4 and 5 synchronously in such a way that their peripheral speeds in area 15 are the same. The direction of rotation of the rotary drive 28 can be reversed with the aid of a changeover switch 30.
- the textiles 18 introduced into the area 15 can be moved back and forth through the area 15 in order to treat them repeatedly with the plasma 17. They can then be ejected again on the side of the area 15 on which they were introduced into the area 15.
- the alternating high voltage applied to the electrodes 2 and 3 is safe for operators of the device 1 due to its shape and frequency in view of the dielectric shielding by the material 10, even if they touch the electrodes 2 and 3. Even if the suction device 21 is indicated in FIG. 2, typically no reactive species escape into the environment from the area 15 in such a concentration that they would be dangerous for operators of the device 1.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019110814.4A DE102019110814A1 (en) | 2019-04-26 | 2019-04-26 | Device for treating textiles with a physical plasma |
PCT/EP2020/060744 WO2020216675A2 (en) | 2019-04-26 | 2020-04-16 | Device for treating textiles with a physical plasma |
Publications (1)
Publication Number | Publication Date |
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EP3959946A2 true EP3959946A2 (en) | 2022-03-02 |
Family
ID=70456743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20721171.5A Pending EP3959946A2 (en) | 2019-04-26 | 2020-04-16 | Device for treating textiles with a physical plasma |
Country Status (3)
Country | Link |
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EP (1) | EP3959946A2 (en) |
DE (1) | DE102019110814A1 (en) |
WO (1) | WO2020216675A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020215110A1 (en) | 2020-12-01 | 2022-06-02 | BSH Hausgeräte GmbH | plasma device |
EP4349375A1 (en) * | 2022-10-06 | 2024-04-10 | Elbiotech Sp. z o.o. | Sterilization and disinfection device |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE457624C (en) * | 1926-10-26 | 1928-03-21 | Emil Hoogland | Ironing machine with two spring-loaded ironing rollers |
NL296674A (en) * | 1962-08-16 | |||
BR8804999A (en) * | 1987-10-02 | 1989-05-02 | Dyneema Vof | APPLIANCES AND PROCESS FOR THE SURFACE TREATMENT OF SYNTHETIC YARNS OR FIBERS |
DE3831964A1 (en) * | 1987-12-08 | 1989-06-22 | Klaus Kalwar | Device for corona-discharge treatment of material webs |
DE3827629A1 (en) * | 1988-08-16 | 1990-03-15 | Hoechst Ag | METHOD AND DEVICE FOR THE SURFACE PRE-TREATMENT OF SINGLE OR MULTILAYER MOLDING MATERIAL BY MEANS OF AN ELECTRIC CORONA DISCHARGE |
DE4425558A1 (en) * | 1994-07-19 | 1996-01-25 | Dieter Dr Lehnhardt | Rotary ironing appts. |
US5792517A (en) * | 1996-04-25 | 1998-08-11 | Japan Vilene Company | Process for treating the outer-inner surfaces of a porous non-conductor |
DE19731562B4 (en) * | 1997-07-23 | 2008-11-13 | Softal Electronic Erik Blumenfeld Gmbh & Co. | Method and apparatus for treating the inner surface of porous moving webs by electrical discharges in the range of atmospheric pressure |
DE10359847A1 (en) * | 2003-12-19 | 2005-07-28 | Metsä Tissue Oyj | Process and assembly to modify the surface characteristics of tissue paper or baking paper by exposure to plasma cloud |
EP2210321B1 (en) * | 2007-11-08 | 2015-06-10 | Enercon Industries Corporation | Atmospheric treater with roller confined discharge chamber |
DE102011100751A1 (en) * | 2011-05-05 | 2012-11-08 | Max Planck-Gesellschaft zur Förderung der Wissenschaften e.V. | Method for inactivating odor-relevant molecules, particularly bacteria, of surface, involves generating plasma and inactivating odor-relevant molecules through influence of hot electrons of plasma on molecules to be inactivated |
DE102012103470A1 (en) * | 2012-04-20 | 2013-10-24 | Hochschule für Angewandte Wissenschaft und Kunst - Hildesheim/Holzminden/Göttingen | plasma Roller |
ITBO20120612A1 (en) * | 2012-11-07 | 2014-05-08 | Veneto Nanotech S C P A | PROCEDURE FOR THE TREATMENT OF A SUBSTRATE IN FIBER AND MACHINE TO IMPLEMENT THIS PROCEDURE. |
DE102013000440B4 (en) * | 2013-01-15 | 2014-07-24 | Cinogy Gmbh | Plasma treatment device with a rotatably mounted in a handle housing role |
DE102015108884A1 (en) * | 2015-06-04 | 2016-12-08 | Hochschule für Angewandte Wissenschaft und Kunst - Hildesheim/Holzminden/Göttingen | Apparatus for the plasma treatment of in particular band-shaped objects |
DE102016202424A1 (en) * | 2016-02-17 | 2017-08-17 | Tesa Se | Process for the production of an adhesive tape by means of plasmalamination |
-
2019
- 2019-04-26 DE DE102019110814.4A patent/DE102019110814A1/en active Pending
-
2020
- 2020-04-16 EP EP20721171.5A patent/EP3959946A2/en active Pending
- 2020-04-16 WO PCT/EP2020/060744 patent/WO2020216675A2/en unknown
Also Published As
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DE102019110814A1 (en) | 2020-10-29 |
WO2020216675A3 (en) | 2020-12-17 |
WO2020216675A2 (en) | 2020-10-29 |
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