Contamination resistant fiber sheet

Abstract

A fiber sheet composed of knitted, woven, or non-woven fiber, which is resistant against contamination, and such contamination is easily washed off, and is durable, and suitable for use as materials to make curtains, tapestries, screens, flags, wallpaper, and sliding screen door(fusuma), for both indoor and outdoor environments. The fiber sheet is coated on its both sides of the fiber by ceramics composed of oxidized, nitrogenous, or carbonized forms of metals such as tin, titanium, aluminum, and other metals, forming a thin contamination resistant coating. Typically, the contamination resistant coating comprises SiO 2 or SnO 2 or a combination/mixture of the two substances, and such coating is hard and is superior in protection against contamination

1 - 28 . (canceled)  
   
   
       29 . A method for manufacturing a contamination resistant fiber sheet, comprising the steps for: 
 preparing a fiber sheet of synthetic fiber material; and    physically depositing ceramic coating on both sides of the fiber sheet, the physically deposited ceramic coatings being resistant against contamination such as soil, dirt, smoke, and other airborne particles and substances.    
   
   
       30 . A method for manufacturing a contamination resistant fiber sheet, comprising the steps for preparing a fiber sheet of synthetic fiber material, the method comprising the steps of: 
 physically fixing fluoride resin on one side of the fiber sheet as undercoating; and    physically depositing ceramic coatings on both sides of the fiber sheet, the physically deposited ceramic coatings, being resistant against contamination such as soil, dirt, smoke, and other airborne particles and substances.    
   
   
       31 . A method for manufacturing a contamination resistant fiber sheet, comprising the steps of: 
 preparing a fiber sheet of synthetic fiber material of knitted, woven or non-woven fiber; and    spatter vapor depositing ceramic coatings on both sides of the fiber sheet, the spatter vapor deposited ceramic coatings being resistant against contamination such as soil, dirt, smoke, and other airborne particles.    
   
   
       32 . A method for manufacturing a contamination resistant fiber sheet, comprising the steps of: 
 preparing a fiber sheet of synthetic fiber material of knitted, woven or non-woven fiber;    physically fixing an undercoating on one side of the fiber sheet as undercoating; and    spatter vapor depositing ceramic coatings on both sides of the fiber sheet, the spatter vapor deposited ceramic coatings being resistant against contamination such as soil, dirt, smoke, and other airborne particles.    
   
   
       33 . A method for manufacturing a contamination resistant fiber sheet, comprising the steps of: 
 preparing a fiber sheet of synthetic fiber material of knitted, woven or non-woven fiber; and    spatter vapor depositing ceramic coatings on both sides of the fiber sheet, the spatter vapor deposited ceramic coatings each comprising a mixture of SiO 2  and SnO 2  with a thickness between 1-1000 nm, the ceramic coatings being resistant against contamination such as soil, dirt, smoke, and other airborne particles and substances, wherein the fiber sheet is placed inside a closed chamber and face against an anode and a target including tin and silicon at an atmosphere of inert gas and oxygen mixture.    
   
   
       34 . A method for manufacturing a contamination resistant fiber sheet, comprising the steps of: 
 preparing a fiber sheet of synthetic fiber material of knitted, woven or non-woven fiber;    physically fixing fluoride resin on one side of the fiber sheet as an undercoating; and    spatter vapor depositing ceramic coatings on both sides of the fiber sheet, the spatter vapor deposited ceramic coatings each comprising a mixture of SiO 2  and SnO 2  with a thickness between 1-500 nm, the ceramic coatings being resistant against contamination such as soil, dirt, smoke, and other airborne particles and substances, wherein the fiber sheet is placed inside a closed chamber and face against an anode and a target including tin and silicon at an atmosphere of inert gas and oxygen mixture.    
   
   
       35 . The method as defined in  claim 33  wherein the atmosphere of inert gas and oxygen mixture is held at an approximate pressure of 2×10 −3  Torr.  
   
   
       36 . The method as defined in  claim 34  wherein the atmosphere of inert gas and oxygen mixture is held at an approximate pressure of 6.6×10 −2  Pa.  
   
   
       37 . The method as defined in  claim 33  wherein the spatter vapor depositing step comprises a couple of vapor depositing mechanisms for physically depositing the ceramic coatings on both sides of the fiber sheet.  
   
   
       38 . The method as defined in  claim 34  wherein the spatter vapor depositing step comprises a couple of vapor depositing mechanisms for physically depositing the ceramic coatings on both sides of the fiber sheet.