Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D39/00—Filtering material for liquid or gaseous fluids
  • B01D39/14—Other self-supporting filtering material ; Other filtering material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
  • B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
• • 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
  • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
  • A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
  • A61L2/23—Solid substances, e.g. granules, powders, blocks, tablets
  • A61L2/232—Solid substances, e.g. granules, powders, blocks, tablets layered or coated
• • 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
  • A61L9/00—Disinfection, sterilisation or deodorisation of air
• • 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
  • A61L9/00—Disinfection, sterilisation or deodorisation of air
  • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
• • 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
  • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
  • A61L2209/10—Apparatus features
  • A61L2209/14—Filtering means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
  • B01D2239/04—Additives and treatments of the filtering material
  • B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
  • B01D2275/10—Multiple layers

Definitions

• the present invention generally relates to a filter medium.
• a filter medium having antimicrobial activity More specifically, it relates to a filter medium and a filter element comprising such a filter medium for filtering air for the interior of a motor vehicle so a motor vehicle interior filter.
• the invention relates to a filter module.
• Filter elements produced from filter media serve to filter fluid streams or gaseous media, for example the filtration of an air flow, which is supplied to the vehicle interior of a motor vehicle.
• filter media for example the filtration of an air flow, which is supplied to the vehicle interior of a motor vehicle.
• the present invention and the problems underlying it are described below with reference to a filter medium or filter element for filtering air for the interior of a motor vehicle.
• filters are referred to below as car cabin filters.
• pollutants may be, for example, dust and soot, as well as pollen, bacterial and fungal spores, bacteria and fungi.
• Some metabolic products of the microorganisms are known to be allergens for the human respiratory system. In some individuals, they can trigger asthma attacks and have been shown to cause an immunological defense reaction.
• US 2003/01 162022 A1 describes an air filter for air conditioners, such as those used in offices, homes and buildings for medical care, such as hospitals and nursing homes.
• the filter comprises a composition containing a biocide that is not bound to the filter surface, but adapted to migrate through the particulate matter accumulating on the filter so that the contaminant particles are coated with the biocide.
• Suitable biocides are, for example, 2-bromo-2-nitropropane-1,3-diol, isothiazoline compounds, benzoic acid, benzalkonium halides and the like.
• Filtration medium has a "prophylactic” compound that can be used to reduce the number of microbial organisms.
• the "prophylactic” compound is introduced as a separate layer adjacent to the pleated filter medium.
• the "prophylactic” compound may be water-soluble coenzymes, oil-soluble coenzymes, plant extracts, antibiotics. tika, biocidal metals, aliphatic and aromatic fatty acids and the like.
• WO 2006/003515 A1 discloses an air treatment device for a
• Particulate filter of an air conditioning system of a vehicle consist of a permeable container containing a volatile treatment agent.
• the container is attached to the particle filter.
• a fabric sheet comprising an electrostatically charged meltblown nonwoven web treated with a fluorochemical having a weak cationic emulsifier to reduce the surface energy of the fibers so as to minimize permeation and wetting by oily mists, and thus the To obtain the effect of the charged electrostatic charges to the fibers.
• the fibers may contain polyvinyl-N-pyridinium bromide.
• the fabric is used for face masks and protective clothing. A use for car cabin filters is not provided.
• EP 1 882 51 1 A1 discloses a filter medium with bactericidal
• the object of the present invention to provide a filter medium with antimicrobial effect, which avoids the disadvantages of the prior art. Moreover, the present invention offers the possibility that an already existing filter medium can be equipped with an additional antimicrobial layer without changing the filtration performance.
• An effect comprising a first filter layer in which impurities are retained, and a second filter layer adjacent to the first filter layer, which contains antimicrobial substances, dissolved on the upstream side of the first filter layer.
• the first filter layer may be a nonwoven, in particular a meltblown nonwoven.
• Such a filter medium can be used in particular for filtering air for the interior of motor vehicles.
• other applications are also conceivable, e.g. in air conditioners for building services or also generally in filter systems, e.g. in which a particulate filter layer or a second filter layer is to be protected, in particular against microorganisms such as e.g. Fungi or fungal spores, in particular molds or mold spores, bacteria or algae, in particular those in a living, reproducible or spreadable form.
• the second filter layer may additionally contain nanosilver-based antimicrobial agents.
• the second filter layer may also contain antimicrobial metals and metal compounds, in particular silver, copper and aluminum compounds and / or 2-bromo-2-nitropropane-1,3-diol, further isothiazoline compounds, benzoic acid and derivatives thereof, benzalkonium halides, water-soluble coenzymes , oil-soluble coenzymes, plant extracts, Antibiotics, biocidal metals, aliphatic and / or aromatic fatty acids and / or quaternary surfactants as antimicrobial substances.
• the antimicrobial substances and / or additional biocidal substances are preferably applied by spray application, patting or by means of a padding machine.
• the filter medium itself can be constructed in two layers or three layers. In the
• Order of flow can e.g. on the antimicrobial layer, a particle filter layer and an odor filter layer, comprising activated carbon, follow.
• the antimicrobial layer may be followed by an odor filter layer and then a particulate filter layer.
• the antimicrobial substances or the additional bactericidal substances can be added directly in the production of the second filter layer. Alternatively or in combination, the antimicrobial substances or the additional bactericidal substances can be subsequently introduced into the second filter layer.
• Such a filter medium is particularly suitable for a motor vehicle interior filter.
• the filter medium is preferably folded or corrugated to increase the surface area.
• the folded or corrugated filter medium may be provided with a sideband of nonwoven fabric at least on one side or injected into a plastic frame.
• the pleated or corrugated filter media may be provided with at least one of its end edges, which are the sides of the pleated or corrugated filter medium having a zigzag or wavy shape, with a sideband, particularly a nonwoven sideband.
• a motor vehicle interior filter with the medium described can be used as a replaceable filter element in a filter module, in particular the filter module of a motor vehicle air conditioning system, with a filter holder or a filter housing.
• FIG. 1 shows schematically a two-layer structure of the filter medium according to the invention.
• Fig. 2 shows schematically a three-layer structure of the invention
• the medium according to the invention can be used, for example, in cabin filters for motor vehicles. Further areas of application are vacuum cleaner filters, filter elements for building and stationary air conditioners, filter elements for air cleaners, respiratory filters and the like.
• the filter medium according to the invention is able to kill microorganisms, especially fungi or fungal spores, and at the same time effectively prevent fouling of the filter medium with bacteria, fungi and other microorganisms and in particular a grow-through.
• By-growth is understood to mean the spread of mycelium-forming microorganisms through a barrier layer, e.g. a biocidal layer. This can also be done by bacteria spreading through this layer.
• the filter medium according to the invention is typically constructed so that the antimicrobial layer, i.e. the second filter layer comprising antimicrobial substances, is applied to a medium as an additional layer (medium layer).
• the antimicrobial layer also has a filtering effect and can optionally also be used as a single-layered variant.
• the medium can be constructed either two-ply or three-ply.
• Fig. 1 shows a two-layer structure of a particulate filter medium 2 (first filter layer) and a second filter layer 4 mounted thereon containing the antimicrobial agents.
• the first filter layer 2 may optionally have a graduated structure, that is, have fiber diameter decreasing or increasing in cross-section in the cross-section and / or contain nanofibers, which improve especially the separation performance of fine particles.
• Fig. 2 shows a three-layer structure of a fine fiber layer 6, which was prepared, for example, by the meltblown process, and a further filter layer 8, which is also referred to as a support due to their mechanical strength, and on which the second antimicrobial filter layer 4 is applied ,
• the antimicrobial carrier may be equipped with various microbial agents such as silver, copper, aluminum compounds.
• a particularly advantageous microbial substance is Zn-pyrithione because it has a significant antifungal effect and a very low solubility in water.
• Another particularly preferred substance is octa-isothiazolone.
• preparations based on nanosilver and enzymatic, chemically active substances are possible, such as 2-bromo-2-nitropropane-1,3-diol, isothiazolin compounds, benzoic acid and benzoic acid derivatives, benzalkonium halides, water-soluble and oil-soluble coenzymes, plant extracts, other biocidal metals, aliphatic and aromatic fatty acids and quaternary surfactants, where the active ingredients can be used both as a further option and in combination with Zn. Let pyrithione be used. Different grammages can be used for the second filter layer.
• Substances may be removed by various processes, e.g. be carried out by spray application, patting or by means of a padding machine.
• the antimicrobial layer is advantageously applied to the inflow side. By virtue of the three-layer structure described above, this prevents negative interactions between the active ingredient and the functional particle fiber layer. Due to the special three-layer sandwich construction, it is possible to protect the actual particle filter layer and thus ensure a high filtration efficiency.
• the sandwich construction has the advantage that it can be equipped with an additional antimicrobial layer, which can be offered as an additional option for the existing filter different filter media used in automotive cabin filters with an additional antimicrobial layer (in cabin cabinets is a variety used by different filter media, which are tailored to both regional and manufacturer-specific requirements).
• the additional antimicrobial layer makes it possible to achieve tailor-made solutions for a variety of applications.
• different microorganisms play a role in growth on filter media under different climatic conditions, so that the antimicrobial substances applied to the second filter layer can be selected accordingly and, in addition, the grammage can be varied.
• the filtration efficiency-determining layer can be equipped by a masterbatch with antimicrobial agents, or the medium can by the additional introduction of antimicrobial fibers, which were prepared via a masterbatch, have increased antimicrobial activity.
• the subsequent application of the active ingredient compared to the addition directly in the fiber production has the advantage that lower concentrations of active ingredient are sufficient, since the active ingredient on the outside Fiber is thus in direct contact with the microorganisms.
• An advantage in the masterbatch production or in the addition of fibers from a masterbatch process is that the antimicrobial agents are particularly firmly anchored to the fiber.
• a filter module in particular a particle and / or odor filter, can be produced with a filter housing in which the filter medium is inserted into the filter housing.

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• Health & Medical Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• Epidemiology (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Medicinal Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Filtering Materials (AREA)
• Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
• Air-Conditioning For Vehicles (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (1)

Country Status (7)

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Citations (6)

Family Cites Families (32)

• 2011
  • 2011-06-06 DE DE102011104628A patent/DE102011104628A1/de not_active Ceased
• 2012
  • 2012-06-04 KR KR1020137031142A patent/KR20140024403A/ko not_active Application Discontinuation
  • 2012-06-04 WO PCT/EP2012/060501 patent/WO2012168185A1/de active Application Filing
  • 2012-06-04 EP EP12725438.1A patent/EP2717991A1/de not_active Withdrawn
  • 2012-06-04 CN CN201280027164.2A patent/CN103747844A/zh active Pending
  • 2012-06-04 JP JP2014514019A patent/JP2014522311A/ja active Pending
• 2013
  • 2013-12-04 US US14/096,745 patent/US20140157990A1/en not_active Abandoned
• 2017
  • 2017-10-27 US US15/797,595 patent/US10532309B2/en active Active

Patent Citations (6)

Non-Patent Citations (1)

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