| 摘要 |
PURPOSE: To upgrade the printing quality and carry out the stabilized high speed printing by feeding ink of specified structural viscosity index provided with thixotropic modification working as viscosity from an ink source into an ink liquid chamber. CONSTITUTION: Ink is fed from an ink source, passed through a feed opening 8 opened on a top plate 7 and fed into a liquid chamber 4, and then fed to respective nozzles 2. Ink fed therein is jetted out of a jet outlet 3. In that case, the power multiplication formula of the ink isη=Kx(shear rate)<(η-1)> and when ink thixotropic properties are set approximately ((k) is (pseudoplasticity of viscosity), thixotropic properties having the structural viscosity index (n) of 0.93 or under in the range of shear rate of 10-100 (l/s) and viscosity (η) of 10mPa.s or less at the sear rate of 500 (1/s) is provided. Ink of comparatively high viscosity can be jetted out stably by the arrangement, and/or the refilling time of ink into nozzles is shortened to carry out the high speed recording. |
