| 摘要 |
PROBLEM TO BE SOLVED: To enable stable ink ejection by preventing viscosity increase on a meniscus face and also preventing a thickened ink from entering into a compression chamber. SOLUTION: The inkjet recording head is equipped with a circulating channel which is formed opposite to the ink ejection side of a nozzle plate having a nozzle communicating with the compression chamber formed therein and discharges the ink near the nozzle, and a circulating channel plate in which a first nozzle channel allowing the nozzle to communicate with the compression chamber is formed at least partially of a porous member. The contact angle relative to the ink on the nozzle inner surface of the nozzle plate and on the ink ejection side surface is larger than that relative to the ink of the inner surface of the first nozzle channel, and the relation between the ink inner pressure P1 on the ink supply side, the ink inner pressure P2 of the circulating channel and the atmospheric pressure P3 is P3>P1>P2. COPYRIGHT: (C)2007,JPO&INPIT |
