FIELD: printing equipment.
SUBSTANCE: invention relates to an inkjet printhead for ejecting aqueous ink. Said inkjet printhead contains a front surface with an anti-wetting low-adhesive coating on it. This coating is a reaction product of a mixture of reagents, including a perfluoropolyether diol compound containing an ethoxylated spacer and triisocyanante. Ejected drop of aqueous ink exhibits a low sliding angle of less than 30°, and a large contact angle with the specified front surface of the printhead, which is more than 40°. Said aqueous ink includes a surfactant. At the same time, the low-adhesive coating retains an average contact angle with aqueous ink of more than 40° after it has been contaminated with dried aqueous ink.
EFFECT: anti-wetting low adhesive coatings for printheads for aqueous ink are proposed.
6 cl, 9 dwg, 1 tbl, 5 ex
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