WO2022158274A1 - 保護処理方法、不活化機能搭載方法、シート材、構造体 - Google Patents
保護処理方法、不活化機能搭載方法、シート材、構造体 Download PDFInfo
- Publication number
- WO2022158274A1 WO2022158274A1 PCT/JP2021/048814 JP2021048814W WO2022158274A1 WO 2022158274 A1 WO2022158274 A1 WO 2022158274A1 JP 2021048814 W JP2021048814 W JP 2021048814W WO 2022158274 A1 WO2022158274 A1 WO 2022158274A1
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- WO
- WIPO (PCT)
- Prior art keywords
- target space
- ultraviolet rays
- protective film
- light
- base material
- Prior art date
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Images
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
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultraviolet radiation
-
- 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
- A61L9/18—Radiation
- A61L9/20—Ultraviolet radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
- D06N7/0002—Wallpaper or wall covering on textile basis
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
-
- 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
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
-
- 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
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/20—Targets to be treated
- A61L2202/25—Rooms in buildings, passenger compartments
Definitions
- the present invention relates to a protective treatment method for a target space in which bacteria and viruses are inactivated using ultraviolet rays.
- the present invention also relates to a method of installing an inactivation function for a target space, including the protection process.
- the present invention also relates to a sheet material suitable for implementing the protective treatment method.
- the present invention relates to a structure equipped with said protection treatment and said deactivation function.
- Bacteria bacteria, fungi, etc.
- viruses that exist in space or on the surface of objects can cause infectious diseases in humans and animals other than humans, and there is concern that the spread of infectious diseases will threaten our lives. .
- infectious diseases are likely to spread, so bacteria and viruses (hereinafter referred to as " There is a need for an effective means for inactivating these bacteria.
- DNA exhibits the highest absorption characteristics around a wavelength of 260 nm.
- a low-pressure mercury lamp exhibits a high emission spectrum near a wavelength of 254 nm. For this reason, a technique of sterilizing using a low-pressure mercury lamp is widely used.
- UV rays in this wavelength range have the risk of affecting the human body when exposed to it.
- the skin is divided into three parts, starting from the surface, the epidermis, dermis, and the subcutaneous tissue, and the epidermis has four parts, the stratum corneum, the stratum granulosum, the stratum spinosum, and the stratum basale, starting from the surface. divided into layers.
- the human body is irradiated with ultraviolet light with a wavelength of 254 nm, it penetrates the stratum corneum, reaches the stratum granulosum, stratum spinosum, and in some cases the stratum basale, and is absorbed by the DNA of cells existing in these layers. This results in the risk of skin cancer. Therefore, it is difficult to actively use ultraviolet rays in such a wavelength band in places where people may exist.
- Patent Document 1 discloses that ultraviolet rays (UVC light) with a wavelength of 240 nm or more are harmful to the human body, and that ultraviolet rays with a wavelength of less than 240 nm have less effect on the human body than ultraviolet rays with a wavelength of 240 nm or more. It is stated that Further, specifically, the results of irradiation experiments with wavelengths of 207 nm and 222 nm are described.
- the inventors of the present invention apply ultraviolet light with a wavelength of less than 240 nm, more specifically 190 nm, to spaces in which humans may exist, such as rooms in buildings, vehicles, and passages (hereinafter referred to as "target space").
- target space spaces in which humans may exist, such as rooms in buildings, vehicles, and passages.
- Intensive studies have been made on inactivating bacteria and viruses using ultraviolet rays that exhibit light output in a specific wavelength range within the range of ⁇ 235 nm. As a result, the following problems were newly discovered.
- Building sheets such as wallpaper and flooring are generally installed on the inner walls, ceilings, and floors of rooms and corridors within buildings. Also, in vehicles such as automobiles and airplanes, it is common that some kind of protective sheet material is arranged in the interior portion. Furthermore, there are cases where protective sheet materials are provided on surfaces of articles (eg, desks, chairs, various devices, etc.) installed in rooms, corridors, and vehicles.
- the sheet material is irradiated with ultraviolet rays having a wavelength of less than 240 nm, more specifically ultraviolet rays exhibiting light output in a specific wavelength range belonging to the range of 190 nm to 235 nm, the sheet material
- the present inventors conducted extensive studies and found that when the sheet material is irradiated with the ultraviolet rays, even if the illuminance level is as low as 1 mW/cm 2 or less, the sheet material is made of polyvinyl chloride (PVC).
- PVC polyvinyl chloride
- it is composed of a chlorine-based resin represented by , it was found that the speed of discoloration and deterioration is high. Since PVC is a material generally used for building sheets such as wallpaper and flooring, when it is irradiated with the ultraviolet rays in order to inactivate bacteria and viruses in rooms of buildings, the building sheets are exposed over time. may cause discoloration.
- PVC polyvinyl styrene
- PVC polyvinyl styrene
- the present invention provides a target space in which a sheet material whose main component is a chlorine-based resin is placed or planned to be placed, while suppressing the progress of discoloration and deterioration of the sheet material.
- An object of the present invention is to provide a protective treatment method that enables deactivation using ultraviolet rays.
- Another object of the present invention is to provide a method of installing a deactivation function for a target space, which includes a protective treatment that suppresses progress of discoloration and deterioration of such a sheet material.
- a further object of the present invention is to provide a structure whose surface is prevented from being discolored or deteriorated even when installed in a target space where deactivation treatment using ultraviolet rays is performed.
- the present invention is a protective treatment method for a target space in which bacteria or viruses are inactivated
- the target space is a space in which a light source that emits ultraviolet light that exhibits a light output in a specific wavelength range belonging to the range of 190 nm to 235 nm is already arranged or planned to be arranged,
- the term “inactivation” refers to a concept encompassing the killing of bacteria and viruses or the loss of infectivity and toxicity
- the term “bacteria” refers to microorganisms such as bacteria and fungi. Point.
- bacteria or viruses may be collectively referred to as “bacteria or the like”.
- main component is used as a term to mean the component with the highest content on a mass basis.
- main component refers to a component representing 40% by mass or more, more typically 50% by mass or more, and particularly typically 60% by mass or more. target.
- ultraviolet light in a wavelength band shorter than 240 nm suppresses the degree of influence on the human body.
- the target space to which the protection treatment method according to the present invention is applied is irradiated with ultraviolet rays that indicate light output in a specific wavelength range belonging to the range of 190 to 235 nm, thereby suppressing the effects on the human body and preventing bacteria.
- it is a space in which virus inactivation treatment is scheduled.
- the ratio of the integrated value of the light output from 240 nm to 300 nm to the integrated value of the light output from 190 nm to 235 nm is less than 1%.
- bacteria or viruses can be inactivated while suppressing the effects on the human body.
- a light source for emitting such ultraviolet rays an excimer lamp filled with a light emitting gas such as KrCl, KrBr, or ArF, or a solid-state light source such as an LED or a laser diode can be used.
- the peak wavelength of the ultraviolet rays may be within the range of 190 nm to 235 nm.
- the ultraviolet rays more preferably exhibit light output in the wavelength band of 200-230 nm. As a result, a high inactivation effect is realized while further ensuring safety to the human body. Ultraviolet rays in this wavelength range are considered to have little effect on the human body even when irradiated for a relatively long time.
- chlorine-based resins examples include polyvinyl chloride, polyvinylidene chloride, chlorinated polyethylene, and chlorinated polypropylene. All of these have a C--Cl bond.
- the C—Cl bond may be cut by the light energy of the ultraviolet rays.
- the amount and speed at which this C—Cl bond is cleaved depends on the illuminance and irradiation time of the ultraviolet rays (that is, the irradiation dose). For this reason, when a target space in which wallpaper made of, for example, a chlorine-based resin is arranged on the interior surface is irradiated with the ultraviolet rays, discoloration and deterioration of the wallpaper are accelerated compared to the case where the ultraviolet rays are not irradiated.
- a substrate whose main component is a chlorine-based resin is arranged on the interior surface of the target space or on the surface of an object placed in the target space, and the surface of the substrate is A protective film containing a material exhibiting resistance to the ultraviolet rays is formed on the substrate.
- the protective film formed on the surface of the base material attached to the interior surface or the object surface The presence of prevents the ultraviolet rays from being guided to the substrate side. As a result, it is possible to suppress the progress of discoloration and deterioration of the base material.
- Examples of the interior surface include the inner wall surface, floor surface, or ceiling surface of the target space.
- the present invention provides a protective treatment method for a target space in which bacteria or viruses are to be inactivated
- the target space is a space in which a light source that emits ultraviolet light that exhibits a light output in a specific wavelength range belonging to the range of 190 nm to 235 nm is already arranged or planned to be arranged,
- a step of preparing a specific material comprising a substrate whose main component is a chlorine-based resin, and a protective film containing a material exhibiting resistance to ultraviolet rays formed on the surface of the substrate; and attaching the specific material to an interior surface of the target space or a surface of an object placed in the target space.
- a base material whose main component is a chlorine-based resin, and A specific material is formed that includes a protective film that includes a resistant material. Therefore, as in the above-described invention, even if the interior surface of the target space or the surface of an object placed in the target space is irradiated with the ultraviolet rays, the interior surface or the base material placed on the object surface The presence of the protective film formed on the surface suppresses the introduction of ultraviolet rays to the substrate side. As a result, it is possible to suppress the progress of discoloration and deterioration of the base material.
- the present invention provides a protective treatment method for a target space in which bacteria or viruses are to be inactivated
- the target space is a space in which a light source that emits ultraviolet light that exhibits a light output in a specific wavelength range belonging to the range of 190 nm to 235 nm is already arranged or planned to be arranged,
- a protective film containing a material exhibiting resistance to ultraviolet rays is applied to the surface of a base material composed mainly of a chlorine-based resin attached to the interior surface of the target space or the surface of an object placed in the target space. It is another feature to have a step.
- the upper surface of the base material is coated with a protective film.
- a base material such as wallpaper or a sheet material for surface protection, whose main component is chlorine-based resin
- the upper surface of the base material is coated with a protective film.
- This method can be carried out, for example, by dissolving the material exhibiting resistance to ultraviolet rays in a predetermined solvent and then spraying the solvent onto the surface of the base material by spraying or the like.
- the protective film preferably contains a fluororesin as a main component.
- the fluororesin include, but are not particularly limited to, PCTFE (polychlorotrifluoroethylene), PTFE (polytetrafluoroethylene), and the like. According to the earnest research of the present inventors, it was confirmed that the effect of suppressing the progress of discoloration and deterioration by coating with fluorine-based resin is higher than that by glass coating or titanium coating. In addition, since the fluororesin has a high visible light transmittance, it does not affect the color and decoration of the underlying base material (wallpaper, flooring, etc.).
- the protective film contains an ultraviolet absorber in the fluororesin.
- fluorine-based resins there are those that exhibit the property of allowing a certain percentage of the above-mentioned ultraviolet rays to pass through.
- a protective film composed mainly of fluorine-based resin is formed on the surface of the base material, part of the ultraviolet rays will pass through the protective film and irradiate the underlying base material, resulting in There is a possibility that the speed of discoloration and deterioration will be accelerated compared to
- the protective film contains an ultraviolet absorber in the fluorine-based resin, even if the ultraviolet light travels through the fluorine-based resin, the UV absorber is contained in the resin. As a result of being absorbed by the ultraviolet absorber, the amount of ultraviolet rays irradiated to the substrate can be greatly reduced. As a result, the progress of discoloration and deterioration of the substrate is greatly suppressed.
- the UV absorber for example, materials exhibiting UV absorbency such as benzophenone-based, benzotriazole-based, salicylic acid ester-based, and acrylonitrile derivative-based materials are preferably used. These may be used alone or in combination of two or more.
- the ultraviolet absorber preferably has a transmittance of less than 30%, more preferably less than 20%, for ultraviolet rays that indicate light output in a specific wavelength range belonging to the range of 190 nm to 235 nm. % is particularly preferred.
- UV absorber About 0.1 to 10 parts by mass, more preferably about 0.5 to 5 parts by mass, of the ultraviolet absorber is blended with respect to 100 parts by mass of the fluororesin material.
- the light source may irradiate the base material with the ultraviolet rays at an illuminance of 1 mW/cm 2 or less, thereby inactivating bacteria or viruses in the target space.
- TLV Threshold Limit Value
- irradiated for a long period of time such as several months to several years
- a mode in which ultraviolet rays are irradiated and not irradiated within 24 hours may be continued for several months to several years.
- a period of several months to several years may include one or more days on which no ultraviolet rays are irradiated.
- the protective film preferably has a transmittance of 50% or more for visible light in the wavelength band of 400 nm to 600 nm. According to this, since the transparency to visible light is high, it does not affect the color and decoration of the base material (wallpaper, flooring, etc.) existing in the lower layer.
- the protective film preferably has a visible light transmittance of 60% or more, particularly preferably 75% or more.
- the present invention is an inactivation function mounting method for mounting a fungus or virus inactivation function in a target space, arranging, in the target space, a light source that emits ultraviolet rays exhibiting optical output in a specific wavelength range belonging to the range of 190 nm to 235 nm; and a step of executing the protection processing method described above.
- bacteria and viruses are inactivated while suppressing the progress of discoloration and deterioration of the base material in the target space in which the base material mainly composed of chlorine-based resin is arranged. It is possible to give a function that can be used.
- the present invention provides a protective sheet material to be attached in a target space in which bacteria or viruses are to be inactivated, A substrate whose main component is a chlorine-based resin; and a protective film formed on the surface of the base material and containing a material exhibiting resistance to ultraviolet rays, which outputs light in a specific wavelength range belonging to the range of 190 nm to 235 nm.
- Such a sheet material can be used as an interior surface in a target space where the light source that emits ultraviolet light is arranged for the purpose of inactivating bacteria or viruses, or as a protective sheet for the surface of an object placed in the target space. Even if it is exposed to the ultraviolet rays, it is possible to suppress the progress of discoloration and deterioration due to the irradiation of the ultraviolet rays.
- the present invention provides a structure equipped with a fungus or virus inactivation function, a light source that emits ultraviolet rays exhibiting light output in a specific wavelength range belonging to the range of 190 nm to 235 nm; a protective film containing a material exhibiting resistance to the ultraviolet rays, disposed within the ultraviolet irradiable region; and a substrate composed of a chlorine-based resin as a main component, which is disposed under the protective film.
- Examples of such structures include spaces in buildings where humans may exist, such as rooms, vehicles, and corridors.
- the present invention while using a sheet material (base material) whose main component is a chlorine-based resin in the target space, while suppressing the progress of discoloration and deterioration of the base material, bacteria and viruses in the target space. can be inactivated.
- FIG. 1 is a diagram schematically showing an example of a situation in which the inactivation treatment according to the present invention is assumed.
- the example shown in FIG. 1 illustrates a situation in which a light source 1 that emits ultraviolet rays L1 is placed in a room 50 such as a conference room.
- the light source 1 is arranged for the purpose of inactivating bacteria and the like in the room 50 . That is, in the example shown in FIG. 1, the room 50 corresponds to the "target space". More specifically, the light source 1 is arranged for the purpose of inactivating the desk 51, the chair 52, the wallpaper 53, and the space of the room 50, which are present in the room 50.
- FIG. 1 is a diagram schematically showing an example of a situation in which the inactivation treatment according to the present invention is assumed.
- the example shown in FIG. 1 illustrates a situation in which a light source 1 that emits ultraviolet rays L1 is placed in a room 50 such as a conference room.
- the light source 1 is arranged
- FIG. 1 corresponds to a drawing showing a room 50 in a state in which the protection treatment method and/or the deactivation function mounting method according to the present invention are implemented. The steps for implementing each of the above methods will be described later.
- the light source 1 is configured to emit ultraviolet rays L1 exhibiting light output in a specific wavelength range within the range of 190 nm to 235 nm.
- the light source 1 is composed of an excimer lamp.
- a more detailed specific example of the excimer lamp 10 is, as schematically illustrated in FIG. electrodes (15, 16).
- the luminous gas G13 is made of a material that emits ultraviolet light L1 that exhibits optical output in a specific wavelength range within the range of 190 nm to 235 nm during excimer light emission.
- the luminescence gas G13 includes KrCl, KrBr, and ArF.
- the excimer lamp 10 when KrCl is contained in the luminous gas G13, the excimer lamp 10 emits ultraviolet rays L1 having a peak wavelength of about 222 nm.
- the excimer lamp 10 When KrBr is contained in the luminous gas G13, the excimer lamp 10 emits ultraviolet rays L1 having a peak wavelength of about 207 nm.
- the luminous gas G13 contains ArF, the excimer lamp 10 emits ultraviolet light L1 having a peak wavelength of about 193 nm.
- the tube wall of the arc tube 13 may be coated with a phosphor to emit ultraviolet light L1 having a wavelength longer than that of the excimer light.
- FIG. 3 is a drawing showing an example of the spectrum of the ultraviolet rays L1 emitted from the excimer lamp 10 in which the luminous gas G13 contains KrCl. According to the spectrum shown in FIG. 3, the ratio of the integrated light output from 240 nm to 300 nm to the integrated light output from 190 nm to 235 nm is less than 1%.
- the mode of the light source 1 is not limited as long as it is configured to emit ultraviolet light L1 indicating light output in a specific wavelength range within the range of 190 nm to 235 nm. That is, the light source 1 may be composed of a solid-state light source such as an LED or a laser diode instead of the excimer lamp 10 . Moreover, even if the light source 1 includes the excimer lamp 10, the shape of the excimer lamp 10 is not limited to that shown in FIG.
- the light source 1 irradiates the interior of the room 50 with the ultraviolet light L1, so that the articles (the desk 51, the chair 52, the wallpaper 53, etc.) in the room 50 and the space of the room 50 are infected with bacteria and the like. Inactivate.
- the surface of the wallpaper 53 corresponds to the "interior surface of the target space”
- the surface of the desk 51 and the chair 52 corresponds to the "object surface arranged in the target space”.
- the light source 1 When inactivating bacteria, etc., the light source 1 preferably irradiates ultraviolet rays L1 at an illuminance of 1 mW/cm 2 or less. It will be described later that even with such a low illuminance, the fungus inactivation function can be realized.
- the cumulative irradiation amount is kept within the TLV reference value. Inactivation treatment can be performed while
- FIG. 4 is a diagram schematically showing how the wallpaper 53 is irradiated with the ultraviolet rays L1 from the light source 1.
- FIG. 4 is a diagram schematically showing how the wallpaper 53 is irradiated with the ultraviolet rays L1 from the light source 1.
- FIG. 4 has substrate 2 and protective film 3 .
- the protective film 3 is formed on the surface of the base material 2 (more specifically, the surface on the inner space side of the room 50). By forming the protective film 3, the surface of the base material 2 is not exposed to the internal space.
- the main component of the base material 2 is chlorine-based resin.
- Chlorinated resins include polyvinyl chloride, polyvinylidene chloride, chlorinated polyethylene, chlorinated polypropylene and the like, and polyvinyl chloride is typically used.
- the protective film 3 is mainly composed of a fluororesin and contains an ultraviolet absorber. Typically, an ultraviolet absorber is dispersed within the fluororesin.
- FIG. 5 is a graph showing a transmission spectrum of PTFE as an example of fluororesin.
- the transmission spectrum shown in FIG. 5 is obtained by placing a resin made of PTFE facing a light source, receiving the light transmitted through this resin by a light receiver, and comparing the intensity of light received with respect to the intensity of light emitted from the light source. Created by resolving the ratio by wavelength.
- PTFE has a transmittance of more than 70% for visible light in the wavelength band of 400 nm to 600 nm.
- the ultraviolet absorber for example, materials that exhibit ultraviolet absorption such as benzophenone-based, benzotriazole-based, salicylic acid ester-based, and acrylonitrile derivative-based materials can be used.
- the ultraviolet absorber can be mixed/dispersed in the fluorine-based resin, and is preferably a material having a low transmittance to ultraviolet light L1, which exhibits light output in a specific wavelength range within the range of 190 nm to 235 nm.
- the transmittance is less than 30%, more preferably less than 20%, particularly preferably less than 10%.
- the ultraviolet absorber is preferably a material exhibiting a transmittance of 50% or more for visible light in the wavelength band of 400 nm to 600 nm.
- the protective film 3 can be manufactured, for example, by kneading an ultraviolet absorber such as a benzophenone-based material into fluorine-based resin such as PTFE. As another method, both the constituent material of the fluororesin and the constituent material of the ultraviolet absorber may be dissolved in a solvent such as butyl acetate or dimethyl ether. The protective film 3 is formed on the upper surface of the base material 2 by applying this solvent to the upper surface of the base material 2 and volatilizing the solvent.
- an ultraviolet absorber such as a benzophenone-based material into fluorine-based resin such as PTFE.
- a solvent such as butyl acetate or dimethyl ether.
- the protective film 3 is formed on the surface of the base material 2, when the ultraviolet rays L1 are irradiated from the light source 1 toward the wallpaper 53, the progress of the ultraviolet rays L1 is restricted in the protective film 3.
- the dose of the ultraviolet rays L1 applied to the positioned base material 2 is greatly reduced.
- the C—Cl bond contained in the constituent material of the base material 2 is less likely to be cut by the light energy derived from the ultraviolet rays L1. Therefore, progress of discoloration and deterioration of the base material 2 is suppressed.
- the protective film 3 since the protective film 3 has a high transmittance to visible light, even if the protective film 3 is formed on the surface of the base material 2, it affects the color and decoration of the base material 2 located in the lower layer. never In other words, it is possible to suppress the progress of discoloration and deterioration due to the irradiation of the ultraviolet rays L1 while maintaining the original color and decoration of the wallpaper 53 .
- the case where the wallpaper 53 is configured to have the base material 2 and the protective film 3 has been described as an example.
- the surfaces of the desk 51 and the chair 52 are also provided with protective members.
- the protective member include the base material 2 and the protective film 3 . Accordingly, like the wallpaper 53, it is possible to suppress the progress of discoloration and deterioration due to the irradiation of the ultraviolet rays L1 without affecting the color and decoration of the desk 51 and the chair 52.
- the first mode is mainly assumed to be a new room 50, and is executed through the following steps.
- Step S1 Wallpaper 53 for interior decoration is attached to the inner wall of the room 50.
- the wallpaper 53 is configured by forming the protective film 3 on the surface of the base material 2 as described above with reference to FIG.
- the protective film 3 may be provided on the upper surface of the base material 2 after the base material 2 is installed, or the base material 2 with the protective film 3 already formed (" It corresponds to "specific material”. ) may be attached.
- the floor of the room 50 may also be provided with a floor material in which the protective film 3 is formed on the surface of the base material 2 in the same manner as the wallpaper 53 .
- the wallpaper 53 similar to that described above may be attached to the ceiling surface of the room 50 .
- the protective film 3 formed in a sheet shape may be adhered to the upper surface of the base material 2, and the fluorine-based resin and the ultraviolet absorber may be dissolved.
- the solvent thus obtained may be applied to the surface of the substrate 2 .
- a material having high resistance to ultraviolet light L1 is preferably used as the adhesive used for bonding.
- Step S2 A light source 1 that emits ultraviolet rays L1 is arranged at a predetermined location in a room 50. - ⁇ In the example of FIG. 1, the light source 1 is arranged on the ceiling surface of the room 50 . Note that the order of step S2 and step S1 can be changed as appropriate.
- the new room 50 is equipped with a fungus inactivation function, and the base material 2 such as the wallpaper 53 is subjected to a protective treatment from the ultraviolet rays L1. If the light source 1 has already been placed in the room 50 because step S2 has already been performed, step S1 is performed so that the interior surface of the room 50 and the like are protected against the ultraviolet rays L1. processed.
- Step S1a The base material 2 as wallpaper is usually already arranged on the interior surface of the existing room 50 . Therefore, a protective film 3 is attached to the surface of the base material 2 .
- the sheet-shaped protective film 3 may be attached to the upper surface of the base material 2, and the fluorine-based resin and the ultraviolet absorber are dissolved.
- the solvent may be applied to the surface of the substrate 2 .
- the latter method is preferable in view of workability.
- the protective film 3 may be attached to the surface of the existing floor material for the floor surface of the room 50 as well. As for the ceiling surface of the room 50, the protective film 3 may be attached to the surface of the base material 2 as the existing wallpaper in the same manner as described above.
- Step S2 As in the first mode, the light source 1 that emits the ultraviolet rays L1 is placed at a predetermined location in the room 50 before and after the step S1 is performed. As a result, the existing room 50 is equipped with a fungus inactivation function, and a protective treatment is applied to the base material 2 such as wallpaper.
- FIG. 6A is a photograph of samples 61-64 before the verification experiment.
- a sample 61 is a plate of polyvinyl chloride (PVC), which is an example of a chlorine-based resin.
- Samples 62 to 64 are all obtained by subjecting the surface of sample 61 to treatment. Details are as follows.
- a sample 62 is obtained by subjecting the surface of the sample 61 to a glass coating treatment. Specifically, the surface of the sample 61 was generated by spraying a volatile solvent such as xylene or ethylbenzene in which acrylic resin and glass beads were dissolved. .
- a sample 63 is obtained by subjecting the surface of the sample 61 to a titanium coating treatment. Specifically, it was produced by spraying an aqueous solution of 0.85% titanium oxide onto the surface of the sample 61 and drying it. .
- a sample 64 is obtained by subjecting the surface of the sample 61 to a fluorine coating treatment. Specifically, it was produced by spraying a volatile solvent such as dimethyl ether in which PTFE as a fluorine-based resin was dissolved on the surface of the sample 61 .
- Samples 62 to 64 have the surface of sample 61 treated, respectively, but all of them show the same degree of visible light transmittance as sample 61, and look almost the same.
- FIG. 6B is a photograph of samples 61 to 64 after being continuously irradiated with ultraviolet light L1 having a peak wavelength of 222 nm emitted from a KrCl excimer lamp at an illuminance of 0.44 mW/cm 2 for 644 hours.
- This cumulative irradiation dose corresponds to 127 years when converted to 22 mJ/cm 2 , which is the standard value of TLV per day for ultraviolet rays with a wavelength of 222 nm.
- this cumulative irradiation amount may be reached in a period shorter than 127 years.
- the sample 62 subjected to the glass coating treatment and the sample 63 subjected to the titanium coating treatment were discolored and deteriorated by the ultraviolet rays L1 with respect to the base material 2 (here, polyvinyl chloride). It was confirmed that there was almost no effect on In the case of these treatments, a film with low resistance to the ultraviolet rays L1 was formed on the surface of the base material 2, and as with the untreated sample 61, discoloration progressed due to an increase in the irradiation dose of the ultraviolet rays L1.
- the fluororesin transmits a certain amount of ultraviolet light L1 that exhibits light output in a specific wavelength range within the range of 190 nm to 235 nm. Therefore, in the case where the protective film 3 is composed only of a fluororesin, as the irradiation dose of the ultraviolet rays L1 increases, the speed is slower than in the case where the protective film 3 is not provided, but the substrate 2 Discoloration and deterioration may progress. From this point of view, the protective film 3 preferably contains an ultraviolet absorber in addition to the fluororesin.
- the surface of the sample 61 is coated by spraying a volatile solvent such as dimethyl ether in which PTFE as a fluorine-based resin and a hydroxybenzophenone-based material as an ultraviolet absorber are dissolved.
- a volatile solvent such as dimethyl ether in which PTFE as a fluorine-based resin and a hydroxybenzophenone-based material as an ultraviolet absorber are dissolved.
- the PVC resin After 58.1 hours from the start of irradiation (corresponding to about one year when converted to the TLV standard value of 22 mJ/cm 2 per day), the PVC resin turned brown. The color was discolored, and the discoloration was clearly confirmed visually. On the other hand, for the PC resin, the ABS resin, and the PET resin, visually there was not much difference in color compared to the situation before the irradiation with the ultraviolet rays L1. Furthermore, when the irradiation with the ultraviolet light L1 was continued, the discoloration progressed so that the PVC resin was further tinged with brown.
- PVC resin is a substance with C-Cl bonds. From this point of view, it is presumed that the PVC resin deteriorated and discolored as a result of the C—Cl bond being cut by irradiation with the ultraviolet light L1. On the other hand, since PC resin, ABS resin, and PET resin do not have a C—Cl bond, it is presumed that these resins originally had higher resistance to ultraviolet rays L1 than PVC resin.
- FIG. 7A is a graph of the above experimental results, in which the horizontal axis corresponds to the irradiation dose of ultraviolet L1, and the vertical axis corresponds to the survival rate of Staphylococcus aureus.
- the vertical axis corresponds to the log value of the ratio of the number of colonies of Staphylococcus aureus after irradiation to the number of colonies of Staphylococcus aureus before irradiation with ultraviolet light L1.
- Staphylococcus aureus can be inactivated even when the illuminance of the ultraviolet rays L1 is as extremely low as 0.001 mW/cm 2 . It has been confirmed that the UV light L1 also has an inactivating effect on other bacteria such as Bacillus cereus and Bacillus subtilis.
- FIG. 7B the results of similar verification for influenza virus are shown in FIG. 7B.
- UV light L1 the results of similar verification for influenza virus are shown in FIG. 7B.
- FIG. 7B it is confirmed that virus inactivation can also be achieved by UV light L1. It has been confirmed that UV light L1 also has an inactivating effect on other viruses such as feline coronavirus.
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Abstract
Description
前記対象空間は、190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線を発する光源が既に配置されているか又は配置が予定された空間であり、
前記対象空間の内装面又は前記対象空間内に配置された物体表面に、主成分が塩素系樹脂からなる基材を取り付ける工程と、
前記基材の表面に、前記紫外線に対する耐性を示す材料を含む保護膜を形成する工程とを有することを特徴とする。
以下においても、「菌又はウイルス」を「菌等」と総称することがある。
前記対象空間は、190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線を発する光源が既に配置されているか又は配置が予定された空間であり、
主成分が塩素系樹脂からなる基材と、前記基材の表面に形成された前記紫外線に対する耐性を示す材料を含む保護膜とを有してなる、特定材を準備する工程と、
前記対象空間の内装面又は前記対象空間内に配置された物体表面に前記特定材を取り付ける工程とを有することを別の特徴とする。
前記対象空間は、190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線を発する光源が既に配置されているか又は配置が予定された空間であり、
前記対象空間の内装面又は前記対象空間内に配置された物体表面に取り付けられた、主成分が塩素系樹脂からなる基材の表面に、前記紫外線に対する耐性を示す材料を含む保護膜を塗布する工程を有することを更に別の特徴とする。
前記対象空間内に、190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線を発する光源を配置する工程と、
上述した保護処理方法を実行する工程とを有することを特徴とする。
主成分が塩素系樹脂からなる基材と、
前記基材の表面に形成され、190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線に対する耐性を示す材料を含む保護膜とを有することを特徴とする。
190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線を発する光源と、
前記紫外線の照射可能領域内に配置された、前記紫外線に対する耐性を示す材料を含む保護膜と、
前記保護膜の下層に配置された、主成分が塩素系樹脂からなる基材とを有することを特徴とする。
図3は、発光ガスG13にKrClが含まれるエキシマランプ10から出射される紫外線L1のスペクトルの一例を示す図面である。図3に示すスペクトルによれば、190nm~235nmの光出力の積分値に対する、240nm~300nmの光出力の積分値の比率は、1%未満である。
第一の態様は、主として部屋50を新設する場合が想定され、以下の各工程を経て実行される。
部屋50の内壁に、内装用としての壁紙53を取り付ける。この壁紙53は、図4を参照して上述したように、基材2の表面に保護膜3が形成されて構成されている。なお、壁紙53を取り付ける際には、基材2を設置した後、基材2の上面に保護膜3を設けるものとしても構わないし、既に保護膜3が形成された状態の基材2(「特定材」に対応する。
)を取り付けるものとしても構わない。
紫外線L1を発する光源1を部屋50の所定の箇所に配置する。図1の例の場合には、光源1は部屋50の天井面に配置される。なお、工程S2と工程S1の順番は適宜入れ替えが可能である。
第二の態様は、主として既設の部屋50に対して、不活化処理用の光源1を設置する場合が想定される。
既設の部屋50の内装面には、通常、壁紙としての基材2が既に配置されている。そこで、この基材2の表面に保護膜3を取り付ける。この場合には、第一の態様でも上述したように、シート状に形成された保護膜3を基材2の上面に貼り合わせるものとしても構わないし、フッ素系樹脂と紫外線吸収剤とが溶解された溶媒を、基材2の表面に塗布するものとしても構わない。ただし、この第二の態様の場合には、作業性に鑑みて後者の方法が好適である。特に、フッ素系樹脂と紫外線吸収剤とが溶解された溶媒を、圧縮ガスを用いてエアゾールとして噴霧するのが好適である。
第一の態様と同様、工程S1の実行前後に、紫外線L1を発する光源1を部屋50の所定の箇所に配置する。これにより、既存の部屋50に対して、菌等の不活化機能が搭載されると共に、壁紙等の基材2に対する保護処理が施される。
図6Aは、サンプル61~64の検証実験前の写真である。サンプル61は、塩素系樹脂としての一例であるポリ塩化ビニル(PVC)のプレートである。サンプル62~64は、いずれもサンプル61の表面に処理を施したものである。詳細には、以下の通りである。
具体的には、サンプル61の表面に、アクリル樹脂とガラスビーズが溶解されたキシレン、エチルベンゼン等の揮発性溶媒をスプレー噴射することで生成された。。
具体的には、サンプル61の表面に、酸化チタン0.85%の水溶液を噴霧して乾燥させることで生成された。。
具体的には、サンプル61の表面に、フッ素系樹脂としてのPTFEが溶解されたジメチルエーテル等の揮発性溶媒をスプレー噴霧することで生成された。サンプル62~64は、サンプル61の表面にそれぞれ処理が施されているが、いずれも、サンプル61と同程度の可視光透過性を示しており、見た目はほぼ同じである。
基材2として、ポリカーボネイト(PC)樹脂、ABS樹脂、ポリエチレンテレフタレート(PET)樹脂、及びPVC樹脂の4種類を準備し、それぞれの樹脂に対してピーク波長222nmの紫外線L1を、0.04mW/cm2の照度で照射し、樹脂の変色を確認した。
1mW/cm2以下といった低い照度で紫外線L1が部屋50内に照射された場合であっても、部屋50内の菌やウイルスの不活化処理に効果がある点につき、実験結果を参照して説明する。
2 :基材
3 :保護膜
10 :エキシマランプ
13 :発光管
50 :部屋
51 :机
52 :椅子
53 :壁紙
61 :サンプル
62 :サンプル
63 :サンプル
64 :サンプル
G13 :発光ガス
L1 :紫外線
Claims (13)
- 菌又はウイルスの不活化が行われる対象空間に対する保護処理方法であって、
前記対象空間は、190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線を発する光源が既に配置されているか又は配置が予定された空間であり、
前記対象空間の内装面又は前記対象空間内に配置された物体表面に、主成分が塩素系樹脂からなる基材を取り付ける工程と、
前記基材の表面に、前記紫外線に対する耐性を示す材料を含む保護膜を形成する工程とを有することを特徴とする、保護処理方法。 - 菌又はウイルスの不活化が行われる対象空間に対する保護処理方法であって、
前記対象空間は、190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線を発する光源が既に配置されているか又は配置が予定された空間であり、
主成分が塩素系樹脂からなる基材と、前記基材の表面に形成された前記紫外線に対する耐性を示す材料を含む保護膜とを有してなる、特定材を準備する工程と、
前記対象空間の内装面又は前記対象空間内に配置された物体表面に前記特定材を取り付ける工程とを有することを特徴とする、保護処理方法。 - 菌又はウイルスの不活化が行われる対象空間に対する保護処理方法であって、
前記対象空間は、190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線を発する光源が既に配置されているか又は配置が予定された空間であり、
前記対象空間の内装面又は前記対象空間内に配置された物体表面に取り付けられた、主成分が塩素系樹脂からなる基材の表面に、前記紫外線に対する耐性を示す材料を含む保護膜を塗布する工程を有することを特徴とする、保護処理方法。 - 前記光源は、前記基材に対して1mW/cm2以下の照度で前記紫外線を照射することで、前記対象空間内の菌又はウイルスの不活化を行うことを特徴とする、請求項1~3のいずれか1項に記載の保護処理方法。
- 前記保護膜は、フッ素系樹脂を主成分とすることを特徴とする、請求項1~3のいずれか1項に記載の保護処理方法。
- 前記保護膜は、前記フッ素系樹脂内に紫外線吸収剤が含有されてなることを特徴とする、請求項5に記載の保護処理方法。
- 前記保護膜は、400nm~600nmの波長帯域の可視光に対する透過率が50%以上であることを特徴とする請求項1~3のいずれか1項に記載の保護処理方法。
- 前記内装面は、前記対象空間の内壁面、床面、又は天井面であることを特徴とする、請求項1~3のいずれか1項に記載の保護処理方法。
- 対象空間に対して、菌又はウイルスの不活化機能を搭載する不活化機能搭載方法であって、
前記対象空間内に、190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線を発する光源を配置する工程と、
請求項1~3のいずれか1項に記載の保護処理方法を実行する工程とを有することを特徴とする、不活化機能搭載方法。 - 菌又はウイルスの不活化が行われる対象空間内に取り付けられる、保護用のシート材であって、
主成分が塩素系樹脂からなる基材と、
前記基材の表面に形成され、190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線に対する耐性を示す材料を含む保護膜とを有することを特徴とする、シート材。 - 前記保護膜は、フッ素系樹脂を主成分とすることを特徴とする、請求項10に記載のシート材。
- 前記保護膜は、前記フッ素系樹脂内に紫外線吸収剤が含有されてなることを特徴とする、請求項11に記載のシート材。
- 菌又はウイルスの不活化機能が搭載された構造体であって、
190nm~235nmの範囲内に属する特定波長域に光出力を示す紫外線を発する光源と、
前記紫外線の照射可能領域内に配置された、前記紫外線に対する耐性を示す材料を含む保護膜と、
前記保護膜の下層に配置された、主成分が塩素系樹脂からなる基材とを有することを特徴とする、構造体。
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JP2020162716A (ja) * | 2019-03-28 | 2020-10-08 | 永大産業株式会社 | 除菌装置、及び手摺り |
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JPS6436132U (ja) * | 1987-08-28 | 1989-03-06 | ||
JP6025756B2 (ja) | 2011-03-07 | 2016-11-16 | ザ トラスティーズ オブ コロンビア ユニバーシティ イン ザ シティ オブ ニューヨーク | 殺菌装置、及び、殺菌装置の作動方法 |
JP2015112812A (ja) * | 2013-12-12 | 2015-06-22 | 旭化成ケミカルズ株式会社 | 積層体 |
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WO2020070589A1 (en) * | 2018-10-05 | 2020-04-09 | 3M Innovative Properties Company | Multilayer optical films and articles comprising the same |
JP2020162716A (ja) * | 2019-03-28 | 2020-10-08 | 永大産業株式会社 | 除菌装置、及び手摺り |
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