Cleaning blade member

Abstract

An object of the present invention is to provide a cleaning blade member exhibiting excellent mechanical properties including wear resistance. The cleaning blade member formed of a rubber-like elastic material produced through reaction of a long-chain polyol having a number average molecular weight of 1,500 to 3,800, an isocyanate, and an isocyanurate derivative having two or more OH groups, wherein the isocyanurate derivative is employed in an amount of 0.5 to 15 parts by weight with respect to 100 parts by weight of the long-chain polyol.

1 . A cleaning blade member formed of a rubber-like elastic material produced through reaction of a long-chain polyol having a number average molecular weight of 1,500 to 3,800, an isocyanate, and an isocyanurate derivative having two or more OH groups, wherein the isocyanurate derivative is employed in an amount of 0.5 to 15 parts by weight with respect to 100 parts by weight of the long-chain polyol. 
   
   
       2 . A cleaning blade member as described in  claim 1 , wherein the long-chain polyol has a number average molecular weight of 1,650 to 3,000. 
   
   
       3 . A cleaning blade member as described in  claim 1 , wherein the isocyanurate derivative is employed as a cross-linking agent or a chain-extender. 
   
   
       4 . A cleaning blade member as described in  claim 2 , wherein the isocyanurate derivative is employed as a cross-linking agent or a chain-extender. 
   
   
       5 . A cleaning blade member as described in  claim 1 , wherein the long-chain polyol contains a polyester-polyol having an ester concentration of 6.85±0.25 mmol/g, the ester concentration being defined by the following relation:
   ester concentration (mmol/g)=(amount of ester groups by mole)/(weight of polyester-polyol).   
   
   
       6 . A cleaning blade member as described in  claim 5 , wherein the polyester-polyol is formed through dehydration condensation between at least one diol component selected from among nonanediol and methyloctanediol and at least one dibasic acid selected from among adipic acid, sebacic acid, and azelaic acid. 
   
   
       7 . A cleaning blade member as described in  claim 1 , which has a rubber hardness as stipulated by JIS A of 65 to 85°. 
   
   
       8 . A cleaning blade member as described in  claim 1 , which has a rebound resilience of 40 to 80%, as determined at 25° C.