Synthetic polymer film having surface provided with bactericidal activity

Abstract

A synthetic polymer film (34A) having a surface which has a plurality of raised portions (34Ap), (34Bp), wherein a two-dimensional size of the plurality of raised portions (34Ap), (34Bp) is in a range of more than 20 nm and less than 500 nm when viewed in a normal direction of the synthetic polymer film (34A), (34B), the surface having a microbicidal effect, and a concentration of a nitrogen element included in the surface is not less than 0.7 at %.

1 . A synthetic polymer film having a surface which has a plurality of first raised portions, wherein
 a two-dimensional size of the plurality of first raised portions is in a range of more than 20 nm and less than 500 nm when viewed in a normal direction of the synthetic polymer film, the surface having a microbicidal effect,   a concentration of a nitrogen element included in the surface is not less than 0.7 at %, and   the surface has a flat portion between adjoining first raised portions among the plurality of first raised portions.   
     
     
         2 . The synthetic polymer film of  claim 1 , produced from a urethane acrylate-containing acrylic resin. 
     
     
         3 . The synthetic polymer film of  claim 1 , comprising any of an amino group, an isocyanate group and a cyano group. 
     
     
         4 . The synthetic polymer film of  claim 1 , wherein the synthetic polymer film is made from a compound whose terminal functional group includes —NH 2  or —NHR, wherein R represents a hydrocarbon group. 
     
     
         5 . The synthetic polymer film of  claim 1 , further comprising a silane coupling agent, wherein the silane coupling agent includes any of an amino group, an isocyanate group and a cyano group. 
     
     
         6 . The synthetic polymer film of  claim 7 , wherein the silane coupling agent is present in or on the surface of the synthetic polymer film. 
     
     
         7 . The synthetic polymer film of  claim 1 , further comprising an alkali metal salt or an alkali earth metal salt. 
     
     
         8 . The synthetic polymer film of  claim 1 , further comprising a lithium salt. 
     
     
         9 . The synthetic polymer film of  claim 1 , wherein the two-dimensional size of the plurality of first raised portions is smaller than an adjoining distance of the plurality of first raised portions. 
     
     
         10 . The synthetic polymer film of  claim 1 , wherein the plurality of first raised portions include a cylinder portion. 
     
     
         11 . The synthetic polymer film of  claim 1 , wherein the plurality of first raised portions include a conical portion. 
     
     
         12 . The synthetic polymer film of  claim 1 , wherein
 the surface further comprises a plurality of second raised portions superimposedly formed over the plurality of first raised portions,   a two-dimensional size of the plurality of second raised portions is smaller than the two-dimensional size of the plurality of first raised portions and does not exceed 100 nm, and   the plurality of first raised portions include a first raised portion that has two or more of the second raised portions.   
     
     
         13 . The synthetic polymer film of  claim 12 , wherein the plurality of second raised portions include a conical portion. 
     
     
         14 . The synthetic polymer film of  claim 12 , wherein a height of the plurality of second raised portions is more than 20 nm and not more than 100 nm.