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
  • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
  • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
  • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
• • 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
  • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
  • B01D39/2055—Carbonaceous material
• • 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
  • B01D2239/0442—Antimicrobial, antibacterial, antifungal additives
• • 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
  • B01D2239/0464—Impregnants
• • 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
  • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
  • B01D2239/065—More than one layer present in the filtering material

Definitions

• Antibacterial filter and ventilation system of the living space of an associated motor vehicle is an associated motor vehicle.
• the invention mainly relates to an antibacterial filter.
• the invention also relates to an air ventilation system of the passenger compartment of a motor vehicle comprising such a filter.
• the air ventilation systems of the passenger compartment of a motor vehicle such as air conditioning systems, involve the filtration of air entering the passenger compartment.
• the bacteria in the air are thus trapped in the filter.
• the present invention is an antibacterial filter to prevent the appearance of allergic symptoms for people in contact with the filtered air.
• the antibacterial filter of the invention comprises at least one filtration substrate and is essentially characterized in that the filtration substrate further comprises silver or a silver derivative.
• the antibacterial filter of the invention may also include the following optional characteristics considered in isolation or in any possible technical combination:
• the filtration substrate comprises silver chloride whose content by weight relative to the total weight of the filtration substrate is greater than 0.5%.
• the filtration substrate is impregnated with at least one anionic surfactant.
• the anionic surfactant is chosen from ammonium laureth sulphate, ammonium lauryl sulphate, sodium lauryl sulphate and sodium laureth sulphate.
• the content by weight of the anionic surfactant relative to the total weight of the filtration substrate is greater than 3%.
• the filter comprises a succession of filtering layers comprising, in the order and in the direction of the air flow treated by the filter, the filtering substrate, a layer of polypropylene or non-woven and carded polyether, and a layer of non-woven polypropylene; woven obtained by a process of "meltblowing".
• the filter comprises an active carbon layer disposed between the layer of polypropylene or non-woven and carded polyether and the filtration substrate.
• the filter is wrinkled.
• the filtration substrate is impregnated with 5% of anionic surfactant relative to the total weight of the filtration substrate and 1% of silver chloride relative to the total weight of the filtration substrate.
• the invention also relates to a motor vehicle cabin air ventilation system which is essentially characterized in that it comprises at least one filter as previously defined.
• FIG. 1 is a schematic representation in section of a filter of the prior art
• - Figure 2 is a schematic sectional representation of the antibacterial filter of the invention according to a first variant.
• - Figure 3 is a schematic sectional representation of the antibacterial filter of the invention according to a second variant.
• a filter of the prior art 1 comprises a succession of filter layers constituted in the order of the direction of the air flow of a nonwoven filtration substrate 4, a layer of polypropylene or nonwoven polyether 3 and a nonwoven polypropylene layer 2.
• the nonwoven filtration substrate layer 4 comprises an inner layer made of polyethylene terephthalate and an outer polyamide layer, and is situated on the side of the inlet of the air to be filtered, illustrated by the arrow F.
• nonwoven polypropylene layer 2 is obtained by a "meltblowing" process more commonly known as “meltblown".
• the nonwoven polypropylene or polyether layer 3 is said to be carded in that it is obtained by a carding process.
• the filter 1 of the prior art is folded so as to increase the contact area between the different filter layers and the air to be treated.
• the filter of the invention 10 is identical to the filter of the prior art of FIG. 1 in that it comprises a succession of filter layers constituted in FIG. order and in the direction of the air flow of a non-woven filter substrate 11, a layer of polypropylene or non-woven and carded polyether 3 and a nonwoven polypropylene layer 2 obtained by the method of "Meltblowing".
• the density of the nonwoven polypropylene layer 2 is between 10 and 50 g / m 2 , preferably between 15 and 20 g / m 2 .
• the density of the nonwoven and carded polypropylene or polyether layer 3 is between 30 and 100 g / m 2 , preferably between 40 and 80 g / m 2 .
• the density of the filtration substrate is between 10 and 100 g / m 2 , preferably 75 g / m 2 .
• the nonwoven filtration substrate 11 is impregnated with an antibacterial substance 12.
• the antibacterial substance 12 comprises a content of 5% of an anionic surfactant relative to the total weight of the nonwoven filtration substrate 11 and a content of 1% relative to the total weight of the filtration substrate.
• nonwoven 1 1 of silver chloride.
• the anionic surfactant is preferably chosen from ammonium laureth sulphate, ammonium lauryl sulphate, sodium lauryl sulphate and sodium laureth sulphate.
• Silver chloride which has antibacterial properties, can be replaced by silver or any other derivative of silver.
• Each of these two compounds may be present in the filter in contents higher than those indicated above.
• the antibacterial substance present on the filtration substrate comprises at least a content of 3% of an anionic surfactant relative to the total weight of the nonwoven filtration substrate 11 and at least a content of 0%. , 5% silver or a silver derivative based on the total weight of the nonwoven filter substrate 1 1.
• the filter of the invention 13 may further comprise an active carbon layer 14 disposed between the layer of polypropylene or nonwoven polyether 3 and the filter substrate 1 January.
• the density of the active carbon layer 14 is between 150 and 450 g / m 2 .
• the size of the particles retained by the filter of the invention 10,13 of the first and second variants is greater than 0.1 micrometer.
• the antibacterial effectiveness of the filter of the invention of the first and second variants was determined according to the JIS L1902 standard and made it possible to obtain a bactericidal reduction of more than 3 logarithms on klebsiellia pneumonia and staphylococcus aureus.
• the filter of the invention makes it possible to inhibit the bacteria present on the filtration substrate.
• the action of the filter of the invention is thus multiple. Indeed, the filter of the invention allows on the one hand to purify the air entering the cabin, but also to significantly reduce bacterial populations and to prevent allergic reactions and unpleasant odors that can cause inconvenience to the driver and passengers of a motor vehicle.
• the filter of the invention can be mounted on an existing and known air ventilation system, including an air conditioning system, by replacing the filters used in these systems.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Life Sciences & Earth Sciences (AREA)
• Geology (AREA)
• Filtering Materials (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49274701

Family Applications (1)

Country Status (4)

Citations (1)

Family Cites Families (8)

• 2013
  • 2013-06-27 FR FR1301516A patent/FR3007666A1/fr active Pending
• 2014
  • 2014-06-16 WO PCT/EP2014/062549 patent/WO2014206788A1/fr active Application Filing
  • 2014-06-16 CN CN201480035630.0A patent/CN105531011A/zh active Pending
  • 2014-06-16 EP EP14729934.1A patent/EP3013448A1/de not_active Withdrawn

Patent Citations (1)

Non-Patent Citations (1)

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