Patent ID: 8157347
Filing Date: 2012-04-17
Classification: B41J,Y10T

Abstract:
1. An ink jet recording head comprising: a recording head portion comprising a discharge port face in which a discharge port for discharging ink is provided, the discharge port face having a forward contact angle to water within a range of from 80° to 105°; and a sealing tape configured to be adhered on the discharge port face, wherein the sealing tape has a substrate and a pressure-sensitive adhesive layer, wherein the pressure-sensitive adhesive layer includes an acrylic crosslinked polymer obtained by crosslinking an alkyl(meth)acrylate ester copolymer with a metal chelate compound, wherein the alkyl(meth)acrylate ester copolymer is obtained from an alkyl(meth)acrylate ester monomer and a carboxyl group-containing monomer, and wherein the pressure-sensitive adhesive layer has a gel fraction of 85% or higher.