Fabric Feeding System Fabric feeding Fabric Exit ensures perfect registration and alignment throughout, even for delicate and unstable fabrics such as knits or fine silks. If required, this machine may also pre-heat, dry or set the printed fabric, before finally rolling-up the output smoothly and with even tension.
Ichinose-unit: conveyor belt and dryer Ichinose uses a conveyor belt to transport and align the textile substrate. The conveyor belt carrying the fabric gently moves ahead for inkjet printing operation. The print head nozzles are set up right above the carrier belt, and the cloth printed with the inks sprayed from the head nozzles. This can prevent the inks from bleeding onto the cloth. After printing operation the cloth at the exit end is released from the conveyor belt. The conveyor belt can be cleaned whenever necessary
Milled to very fine particle size and particle size distribution
Precise viscosity and surface tension
Good shelf life, no settling
High colour strength
Good colour build up on fabric.
Good fastness properties
Typical operating parameters for ink-jet engines The average particle size of disperse ink must be approx. 0,5 micro meter or lower in order to avoid clogging of the nozzles. Electrostatic deflection systems also require that the ink is electrically conducting which is difficult to achieve in organic solvent based systems. 100 5-30 Piezo 200 1-3 Thermal 400 1-10 Continuous Drop volume Pico litre pl Viscosity cps Print Head
Both exist in water as dispersion of small particles.
These inks must be prepared with high degree of expertise so that the particles will not settle or agglomerate (flocculate).
The particle size must have an average of 0.5 micrometer and the particle size distribution must be very narrow with more than 99% of the particles smaller than 1 micrometer in order to avoid clogging of the nozzles.
The inks used in inkjet printing are known as process colours.
The desired shade is produced on fabric itself during printing operation by blending the primaries -cyan, magenta, yellow and black (CMYK) drop by drop sequentially over a small area rather than being premixed in an ink kitchen prior to printing
Each primary must be transparent to produce compound shades using CMYK.
Theoretically one may be able to produce 16.7 million colours;
however, only 1.5 million might be useful for most textile printing
out of this 1 million colours may be outside the colour space possible from this system.
In order to improve the colour gamut and to obtain extremely fine images special colour systems are developed. Hexachrome® (Pantone Inc.) is a 6-color process consisting of the four basic colours plus orange and green inks. This approach results in more brilliant continuous-tone images and in almost twice the number of colours that can be obtained using CMYK