WO2003097923A1 - Deodorizing curtain and its manufacturing method - Google Patents

Deodorizing curtain and its manufacturing method Download PDF

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Publication number
WO2003097923A1
WO2003097923A1 PCT/IB2003/001834 IB0301834W WO03097923A1 WO 2003097923 A1 WO2003097923 A1 WO 2003097923A1 IB 0301834 W IB0301834 W IB 0301834W WO 03097923 A1 WO03097923 A1 WO 03097923A1
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WO
WIPO (PCT)
Prior art keywords
coating
curtain
photo
fiber sheet
corrosion
Prior art date
Application number
PCT/IB2003/001834
Other languages
French (fr)
Inventor
Masayuki Suzuki
Yoshiko Suzuki
Toshikazu Suzuki
Takahiro Suzuki
Original Assignee
Kabushiki Kaisha Suzutora (Suzutora Corporation)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kabushiki Kaisha Suzutora (Suzutora Corporation) filed Critical Kabushiki Kaisha Suzutora (Suzutora Corporation)
Priority to AU2003227997A priority Critical patent/AU2003227997A1/en
Publication of WO2003097923A1 publication Critical patent/WO2003097923A1/en

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • 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
    • D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
    • 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
    • D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/06—Inorganic compounds or elements
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table
    • D06M11/42—Oxides or hydroxides of copper, silver or gold
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/45—Oxides or hydroxides of elements of Groups 3 or 13 of the Periodic Table; Aluminates
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/46—Oxides or hydroxides of elements of Groups 4 or 14 of the Periodic Table; Titanates; Zirconates; Stannates; Plumbates
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/49—Oxides or hydroxides of elements of Groups 8, 9,10 or 18 of the Periodic Table; Ferrates; Cobaltates; Nickelates; Ruthenates; Osmates; Rhodates; Iridates; Palladates; Platinates
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
    • D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic

Definitions

  • This invention relates to a deodorizing curtain and its manufacturing method that utilizes photo-catalyst, and more particularly a deodorizing curtain which is suitable in use in hotels and hospitals under a "linen supply” system, while its flame-proofing property is not lost but the manufacturing cost is lowered.
  • the deodorizing curtain manufactured from synthetic fiber textiles with anti- corrosion coating of titanium-copper alloy, nickel-copper alloy, or stainless steel formed onto the fiber textile by spattering method, and on top of the anti-corrosion coating, a photo-catalytic coating of oxidized titanium, oxidized zinc or other oxidized metal is disclosed in Japanese Laid-Open Publication No. 7-215295. Also the issued Japanese Patent No. 2,880,070 discloses an anti-corrosion coating composed of silicon dioxide, oxidized aluminum or oxidized zirconium which forms a transparent coating. When the photo-catalytic coating of a curtain is exposed to sunlight or light from other light sources, the oxygen found in the atmosphere around the curtain is activated.
  • the activated oxygen disinfects the air and removes tobacco odors and other bad odors.
  • the anti-corrosion coating found beneath the photo-catalytic coating protects the synthetic fiber textile from corrosion due to its exposure to activated oxygen. Moreover, the anti- corrosion coating is transparent, allowing the color and/or designs of the fabric to be seen through the coating, increasing the fashionability of the curtain. Since both the anti- corrosion coating and the photo-catalytic coating is formed onto the fiber through spattering, the durability of the coating is excellent, and when the underlying fabric is a flame-proofed fabric, the flame-proof ability of the fabric is not lost. On the other hand, the productivity of manufacturing such curtain is low and the cost to manufacture is high.
  • a deodorizing synthetic fiber manufactured by dipping the fiber in an aqueous sol containing oxidized metal and glue resin, remove the water, and dry the fabric to form a coating of photo-catalyst is also known.
  • the oxidized metal particles are surrounded by the glue resin, the photo-catalytic function of the catalysts are weakened and the feel of the fiber is inferior.
  • the flame-proof ability of the fabric is reduced due to the large amount of the glue resin found on the fabric.
  • It is another objective of this invention form to a deodorizing curtain which are collected after a period of usage, then it is washed and then the photo-catalytic coatings are recoated through dipping the curtain in the paint composition. It is another objective of this invention to provide a deodorizing curtain which continuously and efficiently disinfect and deodorize the indoor air by continuously running the curtains through a cycle of washing and recoating after a period of usage.
  • this invention provides a deodorizing curtain comprising a synthetic fiber sheet, an anti-corrosion coating physically vapor deposited on the fiber sheet, and a photo-catalytic coating of metal-oxides formed over the fiber sheet by a resin coating technique other than physical deposition method.
  • the deodorizing curtain comprises a synthetic fiber sheet, anti-corrosion coatings on both sides of the fiber sheet and photo-catalytic coatings which comprises oxidized metal.
  • the anti-corrosion coating is physically vapor deposited on the fiber sheet and the photo-catalytic coating is formed over the anti- corrosion coating by treating it with paint composition containing both the oxidized metal and resin glue.
  • the amount of solid within the photo-catalytic coating is to be 0.5 — 10 g m 2 of oxidized metal and 0.1 - 0.9 g/m 2 of resin glue.
  • the deodorizing curtain known in the art have contained 1 - 10 g/m 2 in solid weight of 1 - 10 g/m2 and the glue resin between 1 - 5 g/m 2 .
  • the amount of oxidized metal in this invention is between 0.5 - 10 g/m 2 , which the figure is very close to the figure of the known deodorizing curtain.
  • the amount of resin glue in this invention is 0.1 - 0.9 g/m 2 and more preferably 0.1 - 0.3 g/m 2 , which the amount is less than the known art.
  • the anti-corrosion coating under photo-catalytic coating protects the synthetic fiber sheet of the curtain from corrosion due to exposure to activated oxygen.
  • the anti-corrosion coating is physically vapor deposited on the fiber sheet, which results in very strong adhesion to of the coating to the fiber sheet, making the coating very hard to remove. Therefore, even when the photo-catalytic coating is removed from washing or from other forces, a photo-catalytic coating may be formed over the anti-corrosion coating following the steps described above, and the deodorizing function of the curtain can easily be restored for low cost.
  • the photo-catalytic function of the coating becomes insufficient, and on the other hand when the amount of oxidized metal within the coating is over 10 g/m 2 , the photo-catalytic coating becomes more easily removed and becomes less economical.
  • the amount of the glue resin is under 0.1 g/m 2 , the photo-catalytic coating is more easily removed while in use, and the photo-catalytic function of the coating is lost, and on the other hand when the amount of glue resin more than 0.9 g/m 2 , the oxidized metal particle becomes covered by the glue resin, and again the photo-catalytic function of the coating is reduced.
  • the curtain is also treated to be anti-flame, this function is also reduced.
  • the synthetic fiber sheet may be nylon fiber, polyester fiber, poly-acrylo-nycryl or other synthetic fiber, and is woven, knit, or made into a non-woven sheet to be used as textile to make the curtain. It is more preferable to use filament, and is it is knit or woven, a monofilament or multifilament line are used. Also the textile may be treated for anti- flame ability suitable for curtain.
  • the anti-corrosion coating found on both sides of the fiber sheet protect the fiber sheet from corrosion from the activated oxygen, and it is to be formed from metal or metal oxide which reflects light.
  • metals which may be used are titanium, copper alloy, nickel-copper alloy, or stainless steel or another metal alloy.
  • metal oxides, which in addition to the reflective quality and anti-corrosion quality, also possesses transparency are silicon dioxide, oxidized aluminum and oxidized zirconium.
  • the anti-corrosion coating listed above also possess reflective quality in addition to the anti-corrosion quality, which by reflecting the light, it prevents the entry of ultra-violet light from entering into the textile. In addition it is superior in fashionability since the coating does not crack.
  • the anti-corrosion coating is formed on the fiber sheet through physical vapor depositing method such as spattering or other method.
  • physical vapor depositing method such as spattering or other method.
  • the fiber sheet is spread inside a closed (sealed) chamber, and against the front side of the fiber sheet, the anode and the target made from metal alloy to form the anti-corrosion coating is placed in the order so the anode is between the fiber sheet and the target.
  • the chamber is then depressurized and inert gas is introduced. Following the introduction of the inert gas, DC voltage is applied between the anode and the target, and metal from the target which is to form the anti-corrosion coating is spatter vaporized, which attaches to the fiber sheet forming a coating.
  • both a gas mixture of oxygen and inert gas is introduced into the closed chamber.
  • the target is to be composed of titanium or other metal, and the titanium or another metal forming the target is spatter vaporized, and the vaporized metal is oxidized at it travels toward the fiber sheet, forming a coating of oxidized metal on the fiber sheet in the similar manner as the metal coating.
  • the anti-corrosion coating is to have a thickness of 1-100 nm, and preferably 3 - 10 nm. When the thickness is under 1 nm, the protective function is insufficient, and the fiber sheet is prone to damage by the activated oxygen. On the other hand, when coating is thicker than 100 nm, the manufacturing cost increases, and is not economical.
  • the photo-catalytic coating is formed over the anti-corrosion coating through process involving resin, such as dipping, painting, or spraying, but if paint composition that contains oxidized metal is used, the concentration of the composition is lower compared to the concentration traditionally used in such method.
  • the concentration of the composition is lower compared to the concentration traditionally used in such method.
  • the paint composition contained 1 - 10 weight units of oxidized metal and 1 — 5 weight units of glue resin to 100 weight units of water.
  • the paint composition used contain 1 - 5 weight units of oxidized metal and 0.1 -0.9 weight units of glue resin to 100 weight units of water.
  • the fiber sheet is processed with the paint composition of this concentration, dried and processed so the amount of oxidized metal coating formed on the fiber sheet is 0.5 - 10 g/m 2 of oxidized metal in solid weight and 1 - 5 g/m 2 of glue resin in solid weight.
  • the amount of oxidized metal is under 1 weight units, the amount of solid formed on the fiber sheet is insufficient and the photo-catalytic function becomes insufficient.
  • the amount of glue resin is under 0.1 weight units, the strength of the photo-catalytic coating is reduced and becomes more easily removed.
  • the amount of glue resin is over 0.9 weight units, the amount of solid forming on the fiber sheet is increased to the extent it becomes more difficult for the oxidized metal to function as a photo-catalyst.
  • the synthetic fiber sheet processed to have formation of anti-corrosion coating and photo-catalytic coating on both sides of the fiber sheet is formed into a curtain by cutting, sewing, forming the necessary pleats / folds, iron the fiber sheet, and perform other processes to finish the fiber sheet as a curtain.
  • the deodorizing curtain formed is used indoors by hanging it in places such as by the window. When the curtain is in use, the sunlight and/or other light sources such as indoor lighting, the photo-catalytic coating is activated and the oxygen found in the indoor air is activated, and the air is disinfected, cleaned and odors removed.
  • the used curtain When the deodorizing curtain is soiled from usage, the used curtain is washed, dried and processed again with the paint composition containing the oxidized metal and paint resin.
  • the used curtain is processed to form a coating containing 0.5 - 10 g/m 2 of oxidized metal and 0.1 - 0.9 g/m 2 of glue resin, reviving the photo-catalytic coating.
  • the curtain with the photo-catalytic coating attached is processed into a deodorizing curtain.
  • the washing process may be performed using water or a dry cleaning process may be used. By washing the curtain, the photo-catalytic coating is removed but is re-formed again through the resin forming process.
  • a synthetic fiber textile preferably made from multifilament lines of polyester fiber, suitable for use as curtain knitted or warp knitted, and the textile is dip dyed or (textile) printed, then the synthetic fiber textile is processed in a flame retardant solution and dried.
  • the flame retardant solution forms a flame retardant (flame proof) coating on the fiber sheet.
  • the sealed (closed) chamber contains, a freely spinning water cooled cylinder, and against (facing) the surface of the cylinder, an anode and a target is placed.
  • the fiber sheet travels from one end of the water cooled cylinder to the other of the cylinder by being wound up.
  • the pressure within the chamber is depressurized to approximately 1.3 X 10 "3 Pa, and a DC voltage of 200 - 1000 V is applied between the anode and the target, and the target material from the target, such as silicon, aluminum, zirconium and/or other metal is spatter evaporated. These spatter evaporated metal reacts with the oxygen found in the chamber, oxidizes the metal, and attaches to the fiber sheet, forming a transparent anti- corrosion coating, preferably formed from silicon dioxide.
  • the set up the fiber sheet within the chamber is rearranged, and identical process is perfomied on the other side of the fiber sheet using same spattering method, resulting in back and front side of the fiber sheet with a light reflective, transparent anti-corrosion coating .
  • the thickness of the anti-corrosion coating is adjusted by adjusting the speed of the fiber sheet traveling, so the anti-corrosion coating formed is between 1 - 100 nm, and preferably between 3 - 10 nm.
  • the fiber sheet is then dipped in a solution (composition) containing 1 - 5 weight units of oxidized metal and 0.1 - 0.9 weight units of glue resin in 100 units of water.
  • composition containing 1 - 5 weight units of oxidized metal and 0.1 - 0.9 weight units of glue resin in 100 units of water.
  • the fiber sheet is dehydrated and dried to form a photo-catalytic coating of metal oxides over the anti-corrosion coating on both sides of the fiber sheet, preferably of titanium dioxide.
  • the amount of metal oxide in solid weight attached to the fiber as the photo-catalytic coating is to be 0.5 - 10 g/m 2 , and preferably between 1 - 5 g/m 2 .
  • the amount of glue resin in solid weight is to be 0.1 - 0.9 g/m 2 , and preferably 0.1 - 0.3 g/m 2 .
  • the textile obtained from the above described process suitable for use as curtain is cut, sewn, the necessary pleats / folds created, ironed, and hooks to hang the curtain is attached.
  • the curtain is then delivered to hospitals, hotels, motels, and homes and used as curtains by hanging it by the window. From this usage, the curtain are soiled or when a predetermined amount of time passes, the curtain is removed from the window, hooks removed, and is washed or dry cleaned, and then dried.
  • the photo-catalytic coating is removed from the curtain.
  • the curtain then goes through the same process of dipping, dehydrating, drying to form the photo-catalytic coating over the anti-corrosion coating. Therefore refomiing / reviving the photo-catalytic coating of the curtain.
  • the amount of oxidized metal attaching to reform the photo-catalytic coating is to be 0.5 - 10 g/m 2 , and preferably 1 - 5 g/m 2 .
  • the amount of glue resin to reform the photo-catalytic coating is to be 0.1 - 0.9 g/m 2 , and preferably 0.1 - 0.3 g/m 2 .
  • This curtain's example of preferred use would be at hospitals, hotels and motels.
  • the anti-corrosion coating is formed through physical vapor depositing method and the amount of oxidized metal in solid weight attached to the fiber sheet is to be 0.5 - 10 g/m 2 , preferably 1 -5 g/m 2 , and the amount of glue in solid weight attached to the fiber sheet is to be 0.1 - 0.9 g/m 2 , and preferably 0.1 - 0.3 g/m 2 .
  • a minimum of two pairs of the curtains are prepared, and are used in an alternating pattern.
  • the other curtain is washed, dried, and again reprocessed with paint composition containing oxidized metal and glue resin to reform the coating.
  • the amount of oxidized metal attached to the curtain in solid weight is to be 0.5 - 10 g/m 2 and the amount of glue resin attached to the curtain in solid weight is to be 0.1 -0.9 g/m 2 , reforming the photo-catalytic coating.
  • the curtain with the reformed photo-catalytic coating is again refinished into a curtain in preparation as a replacement of the curtain used in hospital and hotel rooms.
  • the synthetic fiber sheet is knows as textile suitable for manufacturing curtains.
  • the satin formed from polyester multi-filament line with a sheet weight of 200g/m 2 is used.
  • This fiber sheet is refined, set and using disperse dye, the fiber sheet is dyed using a jet dying machine, soaping, wash in hot water, and then dried.
  • phosphorous based flame-retardant solution the fiber sheet is dipped in the solution, dried and heat treated to create flame-retardant ability to the fiber sheet.
  • the flame-retardant fiber sheet is then placed in the closed chamber for spattering process.
  • the fiber sheet is placed in position inside the chamber and using silicon plate as the target, spattering process is perfo ⁇ ned with the atmosphere within the chamber consisting of argon gas and oxygen.
  • a transparent and light reflective anti-corrosion coating of 5 nm thickness is formed on one side of the fiber sheet through this process. The same process is repeated for the other side of the fiber sheet, resulting in formation of the anti-corrosion coating
  • the photo-catalytic coating consisting of titanium dioxide is formed through dipping process over the fiber sheet with anti-corrosion coating.
  • the paint composition containing both titanium dioxide (Manufactured by Sakai Kagaku K.K. "Titania-Zol CSB", contains Anatase Form Titanium Dioxide - 40% volume weight) and glue resin solutions containing urethane glue resin and solvent (Manufactured by Bayer "Inplaneer DLN", 50 % glue resin by volume) is first prepared. Then to 100 parts of water, 3 parts of "Titania-Zol” and 0.3 pars of glue resin is mixed to adjust and create a paint composition containing 1.2 parts titanium dioxide and 0.15 parts glue resin to 100 parts of water.
  • the fiber sheet with the anti-corrosion coating is then dipped in the paint composition. It is then placed in a centrifugal dehydrating machine and 70% of the solution is removed. The fiber sheet is then dried and heat set.
  • the amount of titanium dioxide attached to the fiber sheet in solid weight was 1.68g/m 2
  • the solid weight of the glue resin attached to the fiber was 0.21 g/m 2 , forming a photo-catalytic coating.
  • the fiber sheet suitable for making curtain processed in this manner is then cut, edges of the four comers of the fiber sheet are sewn using a sewing machine, a pleats is created on the top part of the fiber sheet, and several pleats the down the entire length of the fiber sheet using several cylindrical beam heater are created so the fiber sheet will form a wave like shape.
  • the hooks are removed, washed, dried, and again dipped in the paint composition, and processed in the identical manner as referenced above.
  • the curtain processed in this manner was tested for deodorizing function.
  • a square piece of the curtain measuring 150 mm X 150 mm was cut from the curtain, hung in a testing chamber, lit up using a black light (Ultraviolet ray strength: 150 mW/cm 2 ), and measured amount of acetyl-aldehyde was introduced into the chamber and the change in the acetyl-aldehyde concentration was measured.
  • the Table 1 shows the result of this experiment / testing.
  • Example 1 is the curtain with photo-catalytic coating, and
  • Comparative Example 1 is the curtain which after forming the photo-catalytic coating was used for three months.
  • Example 2 is the curtain which the photo-catalytic coating was formed, then used for three month and then reprocessed to reform the photo-catalytic coating.
  • Comparative Example 2 contains 10 g/m 2 of titanium dioxide and 0g/m 2 of glue resin. Table 1
  • Example 1 used for the first time and Example 2 which the photo-catalytic coating was re-formed on the curtain after washing, both showed good deodorizing function.
  • Comparative Example 1 which was washed lost most of its deodorizing function.
  • Comparative Example 2 which did not contain any glue resin showed superior deodorizing power but on the other hand, since the titanium dioxide that forms the photo- catalytic coating is not attached to the fiber sheet, once the curtain was taken out of the testing chamber and exposed to wind, the titanium dioxide was immediately lost, and deodorizing function was lost.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
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  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Animal Behavior & Ethology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • Inorganic Chemistry (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Abstract

A deodorizing curtain made from synthetic fiber textile with anti-corrosion coating and photo-catalytic coating on both sides of the fiber, which the cost of manufacturing the curtain is reduced significantly by forming the photo-catalytic coating from paint composition containing oxidized metal and glue resin, and after the curtain is used, it may be collected, washed, and retreated with paint composition to reform the photo-catalytic coating to redistribute in a continuous cycle, similar to how towels or linens are supplied in hospital, restaurants and hotels.

Description

SPECIFICATION
TITLE OF THE INVENTION
DEODORIZING CURTAIN AND ITS MANUFACTURING METHOD
BACKGROUND OF THE INVENTION
This invention relates to a deodorizing curtain and its manufacturing method that utilizes photo-catalyst, and more particularly a deodorizing curtain which is suitable in use in hotels and hospitals under a "linen supply" system, while its flame-proofing property is not lost but the manufacturing cost is lowered.
The deodorizing curtain manufactured from synthetic fiber textiles with anti- corrosion coating of titanium-copper alloy, nickel-copper alloy, or stainless steel formed onto the fiber textile by spattering method, and on top of the anti-corrosion coating, a photo-catalytic coating of oxidized titanium, oxidized zinc or other oxidized metal is disclosed in Japanese Laid-Open Publication No. 7-215295. Also the issued Japanese Patent No. 2,880,070 discloses an anti-corrosion coating composed of silicon dioxide, oxidized aluminum or oxidized zirconium which forms a transparent coating. When the photo-catalytic coating of a curtain is exposed to sunlight or light from other light sources, the oxygen found in the atmosphere around the curtain is activated. The activated oxygen disinfects the air and removes tobacco odors and other bad odors. The anti-corrosion coating found beneath the photo-catalytic coating protects the synthetic fiber textile from corrosion due to its exposure to activated oxygen. Moreover, the anti- corrosion coating is transparent, allowing the color and/or designs of the fabric to be seen through the coating, increasing the fashionability of the curtain. Since both the anti- corrosion coating and the photo-catalytic coating is formed onto the fiber through spattering, the durability of the coating is excellent, and when the underlying fabric is a flame-proofed fabric, the flame-proof ability of the fabric is not lost. On the other hand, the productivity of manufacturing such curtain is low and the cost to manufacture is high.
On the other hand, a deodorizing synthetic fiber manufactured by dipping the fiber in an aqueous sol containing oxidized metal and glue resin, remove the water, and dry the fabric to form a coating of photo-catalyst is also known. In this known art, since the oxidized metal particles are surrounded by the glue resin, the photo-catalytic function of the catalysts are weakened and the feel of the fiber is inferior. In addition, when the fabric is flame-proofed, the flame-proof ability of the fabric is reduced due to the large amount of the glue resin found on the fabric.
SUMMARY OF THE INVENTION
Accordingly, it is an object of this invention to provide a deodorizing curtain with both photo-catalytic coating and anti-corrosion coating. It is another objective of this invention to form the anti-corrosion coating over the synthetic fiber sheet by physical vapor depositing method.
It is another objective of this invention to form the photo-catalytic coating over the anti-corrosion coating.
It is another objective of this invention to form the photo-catalytic coating over the anti-corrosion coating by dipping the fiber coated with the anti-corrosion coating into a paint composition containing oxidized metal and glue resin.
It is another objective of this invention for the photo-catalytic coating formed over
• • • 9 • the anti-corrosion coating by dipping to form a coating containing 0.5 — lOg/m of solid oxidized metal in solid weight and 0.1 - 0.9 g/m2 of glue resin in solid weight, and preferably 0.1 - 0.3 g m2.
It is another objective of this invention to form the photo-catalytic coating which is inferior in terms of durability of the photo-catalytic coating when the durability alone is compared to the durability of the photo-catalytic coating formed through spattering method, but the anti-corrosion coating remain equally durable and the flame-proof ability as a curtain remain equally effective, and the manufacturing cost associated with the formation of photo-catalytic coating is effectively lowered significantly.
It is another objective of this invention form to a deodorizing curtain which are collected after a period of usage, then it is washed and then the photo-catalytic coatings are recoated through dipping the curtain in the paint composition. It is another objective of this invention to provide a deodorizing curtain which continuously and efficiently disinfect and deodorize the indoor air by continuously running the curtains through a cycle of washing and recoating after a period of usage.
To accomplish one or more of the above objectives, this invention provides a deodorizing curtain comprising a synthetic fiber sheet, an anti-corrosion coating physically vapor deposited on the fiber sheet, and a photo-catalytic coating of metal-oxides formed over the fiber sheet by a resin coating technique other than physical deposition method.
In an embodiment of this invention , the deodorizing curtain comprises a synthetic fiber sheet, anti-corrosion coatings on both sides of the fiber sheet and photo-catalytic coatings which comprises oxidized metal. The anti-corrosion coating is physically vapor deposited on the fiber sheet and the photo-catalytic coating is formed over the anti- corrosion coating by treating it with paint composition containing both the oxidized metal and resin glue. The amount of solid within the photo-catalytic coating is to be 0.5 — 10 g m2 of oxidized metal and 0.1 - 0.9 g/m2 of resin glue.
The deodorizing curtain known in the art have contained 1 - 10 g/m2 in solid weight of 1 - 10 g/m2 and the glue resin between 1 - 5 g/m2. The amount of oxidized metal in this invention is between 0.5 - 10 g/m2, which the figure is very close to the figure of the known deodorizing curtain. On the other hand, the amount of resin glue in this invention is 0.1 - 0.9 g/m2 and more preferably 0.1 - 0.3 g/m2, which the amount is less than the known art. By decreasing the amount of glue resin, the photo-catalytic coating becomes more easily removable and lost, but the photo-catalytic effect of the coating is fully displayed and the flame proof ability of the curtain is not lost when the curtain is treated to be flame proof.
The anti-corrosion coating under photo-catalytic coating protects the synthetic fiber sheet of the curtain from corrosion due to exposure to activated oxygen. In addition the anti-corrosion coating is physically vapor deposited on the fiber sheet, which results in very strong adhesion to of the coating to the fiber sheet, making the coating very hard to remove. Therefore, even when the photo-catalytic coating is removed from washing or from other forces, a photo-catalytic coating may be formed over the anti-corrosion coating following the steps described above, and the deodorizing function of the curtain can easily be restored for low cost.
When the amount of oxidized metal within the coating is under 0.5 g/m2, the photo- catalytic function of the coating becomes insufficient, and on the other hand when the amount of oxidized metal within the coating is over 10 g/m2, the photo-catalytic coating becomes more easily removed and becomes less economical. Also, when the amount of the glue resin is under 0.1 g/m2, the photo-catalytic coating is more easily removed while in use, and the photo-catalytic function of the coating is lost, and on the other hand when the amount of glue resin more than 0.9 g/m2, the oxidized metal particle becomes covered by the glue resin, and again the photo-catalytic function of the coating is reduced. Also when the curtain is also treated to be anti-flame, this function is also reduced.
The synthetic fiber sheet may be nylon fiber, polyester fiber, poly-acrylo-nycryl or other synthetic fiber, and is woven, knit, or made into a non-woven sheet to be used as textile to make the curtain. It is more preferable to use filament, and is it is knit or woven, a monofilament or multifilament line are used. Also the textile may be treated for anti- flame ability suitable for curtain.
The anti-corrosion coating found on both sides of the fiber sheet protect the fiber sheet from corrosion from the activated oxygen, and it is to be formed from metal or metal oxide which reflects light. Some example of metals which may be used are titanium, copper alloy, nickel-copper alloy, or stainless steel or another metal alloy. Some example of metal oxides, which in addition to the reflective quality and anti-corrosion quality, also possesses transparency are silicon dioxide, oxidized aluminum and oxidized zirconium. The anti-corrosion coating listed above also possess reflective quality in addition to the anti-corrosion quality, which by reflecting the light, it prevents the entry of ultra-violet light from entering into the textile. In addition it is superior in fashionability since the coating does not crack.
The anti-corrosion coating is formed on the fiber sheet through physical vapor depositing method such as spattering or other method. Especially with anti-corrosion coating made from metal, the fiber sheet is spread inside a closed (sealed) chamber, and against the front side of the fiber sheet, the anode and the target made from metal alloy to form the anti-corrosion coating is placed in the order so the anode is between the fiber sheet and the target. The chamber is then depressurized and inert gas is introduced. Following the introduction of the inert gas, DC voltage is applied between the anode and the target, and metal from the target which is to form the anti-corrosion coating is spatter vaporized, which attaches to the fiber sheet forming a coating. On the other hand, to form the anti- corrosion coating with oxidized metal, both a gas mixture of oxygen and inert gas is introduced into the closed chamber. The target is to be composed of titanium or other metal, and the titanium or another metal forming the target is spatter vaporized, and the vaporized metal is oxidized at it travels toward the fiber sheet, forming a coating of oxidized metal on the fiber sheet in the similar manner as the metal coating.
The anti-corrosion coating is to have a thickness of 1-100 nm, and preferably 3 - 10 nm. When the thickness is under 1 nm, the protective function is insufficient, and the fiber sheet is prone to damage by the activated oxygen. On the other hand, when coating is thicker than 100 nm, the manufacturing cost increases, and is not economical. Once the anti-corrosion coating is formed on one side of the fiber sheet through the process mentioned above, the fiber sheet is reversed (turned around) and through the same process, the anti-corrosion coating is formed on the backside of the fiber sheet.
In this invention, the photo-catalytic coating is formed over the anti-corrosion coating through process involving resin, such as dipping, painting, or spraying, but if paint composition that contains oxidized metal is used, the concentration of the composition is lower compared to the concentration traditionally used in such method. For example, when the dipping process is used, although it will depend on the concentration of the fibers, traditionally the paint composition contained 1 - 10 weight units of oxidized metal and 1 — 5 weight units of glue resin to 100 weight units of water. In this invention the paint composition used contain 1 - 5 weight units of oxidized metal and 0.1 -0.9 weight units of glue resin to 100 weight units of water. The fiber sheet is processed with the paint composition of this concentration, dried and processed so the amount of oxidized metal coating formed on the fiber sheet is 0.5 - 10 g/m2 of oxidized metal in solid weight and 1 - 5 g/m2 of glue resin in solid weight. However, when the amount of oxidized metal is under 1 weight units, the amount of solid formed on the fiber sheet is insufficient and the photo-catalytic function becomes insufficient. In addition, when the amount of glue resin is under 0.1 weight units, the strength of the photo-catalytic coating is reduced and becomes more easily removed. On the other hand when the amount of glue resin is over 0.9 weight units, the amount of solid forming on the fiber sheet is increased to the extent it becomes more difficult for the oxidized metal to function as a photo-catalyst.
The synthetic fiber sheet processed to have formation of anti-corrosion coating and photo-catalytic coating on both sides of the fiber sheet is formed into a curtain by cutting, sewing, forming the necessary pleats / folds, iron the fiber sheet, and perform other processes to finish the fiber sheet as a curtain. The deodorizing curtain formed is used indoors by hanging it in places such as by the window. When the curtain is in use, the sunlight and/or other light sources such as indoor lighting, the photo-catalytic coating is activated and the oxygen found in the indoor air is activated, and the air is disinfected, cleaned and odors removed.
When the deodorizing curtain is soiled from usage, the used curtain is washed, dried and processed again with the paint composition containing the oxidized metal and paint resin. The used curtain is processed to form a coating containing 0.5 - 10 g/m2 of oxidized metal and 0.1 - 0.9 g/m2 of glue resin, reviving the photo-catalytic coating. The curtain with the photo-catalytic coating attached is processed into a deodorizing curtain. The washing process may be performed using water or a dry cleaning process may be used. By washing the curtain, the photo-catalytic coating is removed but is re-formed again through the resin forming process.
DESCRIPTION OF PREFERRED EMBODIMENTS
According to the first embodiment, a synthetic fiber textile, preferably made from multifilament lines of polyester fiber, suitable for use as curtain knitted or warp knitted, and the textile is dip dyed or (textile) printed, then the synthetic fiber textile is processed in a flame retardant solution and dried. The flame retardant solution forms a flame retardant (flame proof) coating on the fiber sheet.
The sealed (closed) chamber contains, a freely spinning water cooled cylinder, and against (facing) the surface of the cylinder, an anode and a target is placed. The fiber sheet travels from one end of the water cooled cylinder to the other of the cylinder by being wound up. The pressure within the chamber is depressurized to approximately 1.3 X 10"3Pa, and a DC voltage of 200 - 1000 V is applied between the anode and the target, and the target material from the target, such as silicon, aluminum, zirconium and/or other metal is spatter evaporated. These spatter evaporated metal reacts with the oxygen found in the chamber, oxidizes the metal, and attaches to the fiber sheet, forming a transparent anti- corrosion coating, preferably formed from silicon dioxide.
When forming an anti-corrosion coating to one side of the fiber sheet is complete, the set up the fiber sheet within the chamber is rearranged, and identical process is perfomied on the other side of the fiber sheet using same spattering method, resulting in back and front side of the fiber sheet with a light reflective, transparent anti-corrosion coating . The thickness of the anti-corrosion coating is adjusted by adjusting the speed of the fiber sheet traveling, so the anti-corrosion coating formed is between 1 - 100 nm, and preferably between 3 - 10 nm.
The fiber sheet is then dipped in a solution (composition) containing 1 - 5 weight units of oxidized metal and 0.1 - 0.9 weight units of glue resin in 100 units of water. The fiber sheet is dehydrated and dried to form a photo-catalytic coating of metal oxides over the anti-corrosion coating on both sides of the fiber sheet, preferably of titanium dioxide. The amount of metal oxide in solid weight attached to the fiber as the photo-catalytic coating is to be 0.5 - 10 g/m2, and preferably between 1 - 5 g/m2. The amount of glue resin in solid weight is to be 0.1 - 0.9 g/m2, and preferably 0.1 - 0.3 g/m2.
The textile obtained from the above described process suitable for use as curtain is cut, sewn, the necessary pleats / folds created, ironed, and hooks to hang the curtain is attached. The curtain is then delivered to hospitals, hotels, motels, and homes and used as curtains by hanging it by the window. From this usage, the curtain are soiled or when a predetermined amount of time passes, the curtain is removed from the window, hooks removed, and is washed or dry cleaned, and then dried.
From the washing and drying, the photo-catalytic coating is removed from the curtain. The curtain then goes through the same process of dipping, dehydrating, drying to form the photo-catalytic coating over the anti-corrosion coating. Therefore refomiing / reviving the photo-catalytic coating of the curtain. The amount of oxidized metal attaching to reform the photo-catalytic coating is to be 0.5 - 10 g/m2, and preferably 1 - 5 g/m2. The amount of glue resin to reform the photo-catalytic coating is to be 0.1 - 0.9 g/m2, and preferably 0.1 - 0.3 g/m2. By using the curtain with the reformed photo- catalytic coating, the indoor air is again disinfected and deodorized.
This curtain's example of preferred use would be at hospitals, hotels and motels. The curtain formed from synthetic fiber sheet with both sides of the fiber sheet with an anti- corrosion coating, and over the anti-corrosion coating, a photo-catalytic coating is formed. The anti-corrosion coating is formed through physical vapor depositing method and the amount of oxidized metal in solid weight attached to the fiber sheet is to be 0.5 - 10 g/m2, preferably 1 -5 g/m2, and the amount of glue in solid weight attached to the fiber sheet is to be 0.1 - 0.9 g/m2, and preferably 0.1 - 0.3 g/m2. A minimum of two pairs of the curtains are prepared, and are used in an alternating pattern. While one of the curtain is being used, the other curtain is washed, dried, and again reprocessed with paint composition containing oxidized metal and glue resin to reform the coating. The amount of oxidized metal attached to the curtain in solid weight is to be 0.5 - 10 g/m2 and the amount of glue resin attached to the curtain in solid weight is to be 0.1 -0.9 g/m2, reforming the photo-catalytic coating. The curtain with the reformed photo-catalytic coating is again refinished into a curtain in preparation as a replacement of the curtain used in hospital and hotel rooms. By replacing the curtain with a curtain reformed with the photo-catalytic coating allows the indoor air to be continuously and efficiently disinfected and deodorized.
The synthetic fiber sheet is knows as textile suitable for manufacturing curtains. The satin formed from polyester multi-filament line with a sheet weight of 200g/m2 is used. This fiber sheet is refined, set and using disperse dye, the fiber sheet is dyed using a jet dying machine, soaping, wash in hot water, and then dried. Using phosphorous based flame-retardant solution, the fiber sheet is dipped in the solution, dried and heat treated to create flame-retardant ability to the fiber sheet. The flame-retardant fiber sheet is then placed in the closed chamber for spattering process. The fiber sheet is placed in position inside the chamber and using silicon plate as the target, spattering process is perfoπned with the atmosphere within the chamber consisting of argon gas and oxygen. A transparent and light reflective anti-corrosion coating of 5 nm thickness is formed on one side of the fiber sheet through this process. The same process is repeated for the other side of the fiber sheet, resulting in formation of the anti-corrosion coating on both sides of the fiber sheet.
The photo-catalytic coating consisting of titanium dioxide is formed through dipping process over the fiber sheet with anti-corrosion coating. The paint composition containing both titanium dioxide (Manufactured by Sakai Kagaku K.K. "Titania-Zol CSB", contains Anatase Form Titanium Dioxide - 40% volume weight) and glue resin solutions containing urethane glue resin and solvent (Manufactured by Bayer "Inplaneer DLN", 50 % glue resin by volume) is first prepared. Then to 100 parts of water, 3 parts of "Titania-Zol" and 0.3 pars of glue resin is mixed to adjust and create a paint composition containing 1.2 parts titanium dioxide and 0.15 parts glue resin to 100 parts of water. The fiber sheet with the anti-corrosion coating is then dipped in the paint composition. It is then placed in a centrifugal dehydrating machine and 70% of the solution is removed. The fiber sheet is then dried and heat set. The amount of titanium dioxide attached to the fiber sheet in solid weight was 1.68g/m2, and the solid weight of the glue resin attached to the fiber was 0.21 g/m2, forming a photo-catalytic coating. The fiber sheet suitable for making curtain processed in this manner is then cut, edges of the four comers of the fiber sheet are sewn using a sewing machine, a pleats is created on the top part of the fiber sheet, and several pleats the down the entire length of the fiber sheet using several cylindrical beam heater are created so the fiber sheet will form a wave like shape.
After the above curtain is used for a period of 3 months, the hooks are removed, washed, dried, and again dipped in the paint composition, and processed in the identical manner as referenced above.
The curtain processed in this manner was tested for deodorizing function. A square piece of the curtain measuring 150 mm X 150 mm was cut from the curtain, hung in a testing chamber, lit up using a black light (Ultraviolet ray strength: 150 mW/cm2), and measured amount of acetyl-aldehyde was introduced into the chamber and the change in the acetyl-aldehyde concentration was measured. The Table 1 shows the result of this experiment / testing. Example 1 is the curtain with photo-catalytic coating, and
Comparative Example 1 is the curtain which after forming the photo-catalytic coating was used for three months. Example 2 is the curtain which the photo-catalytic coating was formed, then used for three month and then reprocessed to reform the photo-catalytic coating. Comparative Example 2 contains 10 g/m2 of titanium dioxide and 0g/m2 of glue resin. Table 1
Figure imgf000015_0001
Example 1 used for the first time and Example 2 which the photo-catalytic coating was re-formed on the curtain after washing, both showed good deodorizing function. In comparison, Comparative Example 1 which was washed lost most of its deodorizing function. Comparative Example 2 which did not contain any glue resin showed superior deodorizing power but on the other hand, since the titanium dioxide that forms the photo- catalytic coating is not attached to the fiber sheet, once the curtain was taken out of the testing chamber and exposed to wind, the titanium dioxide was immediately lost, and deodorizing function was lost.
When flame retardation function was tested for Example 1 and 2. The flame retardation ability / function met the requirement set by Nihon Bouen Kyokai (Japan Fire Retardant Association) for receiving a "I" label for meeting the requirements. The efficiency of forming the photo-catalytic coating was improved more than 10 fold when compared to spattering method and the cost was reduced an amount less than l/5th of the cost compared to spattering method.
While there have been shown and described and pointed out fundamental novel features of the invention as applied to preferred embodiments thereof, it will be understood that various omissions, substitutions, changes in the form and details of the devices and methods illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all embodiments of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.

Claims

What Is Claimed Is:
1. A deodorizing curtain comprising: a synthetic fiber sheet; an anti-corrosion coating physically vapor deposited on the fiber sheet; and a photo-catalytic coating of metal-oxides formed over the fiber sheet by resin coating technique other than physical deposition method.
2. A deodorizing curtain comprising: a synthetic fiber sheet; an anti-corrosion coating physically vapor deposited on the fiber sheet; and a photo-catalytic coating of a composition of oxidized metal and glue resin, the photo-catalytic coating being formed over the fiber sheet by a resin coating technique other than physical deposition method
3. A deodorizing curtain comprising: a synthetic fiber sheet; an anti-corrosion coating physically vapor deposited on the fiber sheet; and a photo-catalytic coating of a paint composition of oxidized metal and glue resin, the photo-catalytic coating being formed over the fiber sheet by painting, dipping or spraying wherein the amount of solid attachment of the oxidized metal is between 0.5 - 10 g / m2 and the amount of attachment of the glue resin is between 0.1 - 0.9 g / m2.
4. A method for manufacturing a deodorizing curtain, comprising the steps of: preparing a synthetic fiber textile; physically vapor depositing an anti-coπosion coating on the fiber textile, and then applying a paint composition of oxidized metal and glue resin as an photo-catalytic coating on the anti-corrosion coating by a plastic coating technique, whereby 0.5 — 10 g / m2 of oxidized metal solid and 0.1 - 0.9 g / m2 of glue resin are attached to the anti- corrosion coating, and cutting, sewing and finishing the resulting synthetic fiber textile with the anti- corrosion coating and the photo-catalytic coating .
5. A method of reprocessing the deodorizing curtain made according to claim 1, further comprising the steps: washing and drying the curtain after the curtain is used, and applying the paint composition of oxidized metal and glue resin again as an photo- catalytic coating on the anti-corrosion coating, so that the reapplied paint composition contains 0.5 - 10 g / m of oxidized metal and 0.1 - 0.9 g / m of glue resin.
6. The deodorizing curtain of claim 1 wherein the synthetic fiber sheet comprises nylon fiber, polyester fiber, poly-acrylo-nycryl or other synthetic fiber.
7. The deodorizing curtain of claim 6 wherein the synthetic fiber sheet is woven, knit or made into a non-woven sheet to be used as textile to make the curtain.
8. The deodorizing curtain of claim 1 wherein the anti-corrosion coating is physically deposited on both sides of the fiber sheet to protect the fiber sheet from corrosion from activated oxygen.
9. The deodorizing curtain of claim 1 wherein the anti-corrosion coating comprises metal or metal oxide with light reflecting property.
10. The deodorizing curtain of claim 1 wherein the anti-corrosion coating comprises titanium, copper alloy, nickel-copper alloy or stainless steel or another metal alloy.
11. The deodorizing curtain of claim 1 wherein the anti-corrosion coating comprises silicon dioxide, oxidized aluminum or oxidized zirconium.
12. The deodorizing curtain of claim 1 wherein the anti-corrosion coating has a thickness of 1-100 nm and preferably 3 - 10 nm.
13. The deodorizing curtain of claim 1 wherein the anti-corrosion coating is light reflective and transparent.
14. A method of using a deodorizing curtain for an extended period of time, comprising the steps of: preparing a synthetic fiber textile; physically vapor depositing an anti-coπosion coating on the fiber textile, and then applying a paint composition of oxidized metal and glue resin as an photo-catalytic coating on the anti-coπosion coating by a resin coating technique, cutting, sewing and finishing the resulting synthetic fiber textile with the anti- corrosion coating and the photo-catalytic coating into the deodorizing curtain; and reapplying the paint composition of oxidized metal and glue resin as an photo- catalytic coating on the anti-corrosion coating after each use of the .
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