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US 6,444,019 B1Granted
Ink jet ink composition
AssigneeVideojet Technologies Inc.
InventorsWan Kang Zou, Xiaomang Wang, Carrie Woodcock, Qiao Qiao Dong, Fengfei Xiao
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AssigneeVideojet Technologies Inc.
InventorsWan Kang Zou, Xiaomang Wang, Carrie Woodcock, Qiao Qiao Dong, Fengfei Xiao
Estimating the term…
The present invention provides a jet ink composition comprising a volatile organic solvent, an oil, one or more binder resins which are soluble in the volatile organic solvent, and a colorant. The ink composition is fast drying and provides excellent adhesion to non-porous substrates. Printers, such as drop-on-demand ink jet printers, employing the ink composition can operate without nozzle clogging even after long non-printing intervals. The present invention further provides a method for reducing clogging of a nozzle orifice in an ink jet printer comprising printing with an ink composition that includes an oil that forms a continuous oil phase which acts as the boundary layer between the air outside the nozzle orifice and the ink inside the nozzle during non-printing intervals. The present invention further provides a process for jet ink printing onto a substrate comprising projecting a stream of ink droplets of the ink composition of the present invention to the substrate and controlling the direction of the droplets so that the droplets form the desired printed image on the substrate.
An ink composition comprising a volatile organic solvent, an oil, one or more binder resins which are soluble in said volatile organic solvent and insoluble or substantially insoluble in the oil, and a colorant, wherein the ink composition is suitable for ink jet printing and is a single phase liquid, the oil is present in an amount of up to about 8% by weight of the ink composition, the oil has a solubility of from about 2% by weight to about 20% by weight of the volatile organic solvent, and the oil is chosen such that it will phase separate when it reaches its solubility limit if the volatile organic solvent is lost due to evaporation.
The ink composition of claim 11, wherein said volatile organic solvent is selected from the group consisting of ethanol, 1-methoxy-2-propanol, n-propoxypropanol, 1-methoxy-2-propyl acetate, ethyl lactate, and combinations thereof.
An ink composition comprising a volatile organic solvent, a non-hygroscopic oil, one or more binder resins which are soluble in said volatile organic solvent and insoluble or substantially insoluble in the oil, and a colorant, wherein the ink composition is suitable for ink jet printing and is a single phase liquid, the non-hygroscopic oil is present in an amount of up to about 8% by weight of the ink composition, and the non-hygroscopic oil has a solubility of from about 2% by weight to about 20% by weight of the volatile organic solvent, and the non-hygroscopic oil is chosen such that it will phase separate when it reaches its solubility limit if the volatile organic solvent is lost due to evaporation.
A method for printing with a drop-on-demand ink jet printer comprising projecting a stream of droplets of an ink composition through one or more nozzle orifices to a substrate, wherein said ink composition includes a volatile organic solvent and an oil, wherein the oil is dissolved in the volatile organic solvent and the oil phase-separates and forms a continuous oil phase at the nozzle orifice during non-printing intervals and said ink composition is suitable for ink jet printing and is a single phase liquid, and the oil has a solubility of from about 2% by weight to about 20% by weight of the volatile organic solvent, and the oil is chosen such that it will phase separate when it reaches its solubility limit if the volatile organic solvent is lost due to evaporation.
A method for reducing clogging of a nozzle orifice in an ink jet printer comprising printing with an ink composition including a volatile organic solvent and an oil which is dissolved in the volatile organic solvent, wherein the oil phase-separates and forms a boundary layer between the air outside the nozzle orifice and the ink composition inside the nozzle orifice during non-printing intervals, and wherein the ink composition is suitable for ink jet printing and is a single phase liquid, and the oil has a solubility of from about 2% by weight to about 20% by weight of the volatile organic solvent, and the oil is chosen such that it will phase separate when it reaches its solubility limit if the volatile organic solvent is lost due to evaporation.
An ink composition comprising a colorant dissolved or dispersed in a single phase solution comprising a volatile organic solvent, an oil which is soluble in the volatile organic solvent, one or more binder resins which are soluble in the volatile organic solvent and insoluble or substantially i soluble in the oil, wherein the ink composition is suitable for use in ink jet printing and the oil is present in an amount of up to about 8% by weight of the ink composition, and the oil has a solubility of from about 2% by weight to about 20% by weight of the volatile organic solvent, and the oil is chosen such that it will phase separate when it reaches its solubility limit if the volatile organic solvent is lost due to evaporation.
An ink composition comprising a volatile organic solvent, an oil, one or more binder resins which are soluble in said volatile organic solvent and insoluble or substantially insoluble in the oil, a colorant, and a surface active agent which is a siloxane, and the oil has a solubility of from about 2% by weighs to about 20% by weight of the volatile organic solvent, and the oil is chosen such that it will phase separate when it reaches its solubility limit if the volatile organic solvent is lost due to evaporation.
The ink composition of claim 46, wherein the siloxane is a polyester modified polydimethylsiloxane.
An ink composition comprising a volatile organic solvent, an oil, one or more binder resins which are soluble in said volatile organ solvent, and a colorant, wherein the oil is selected from the group consisting of aromatic oils, paraffinic oils, extracted paraffinic oils, naphthenic oils, extracted naphthenic oils, mixture of hydrotreated light oils, mixture of hydrotreated light and heavy oils, and combinations thereof.
An ink composition comprising a volatile organic solvent, an oil, one or more binder resins which are soluble in said volatile organic solvent and insoluble or substantially insoluble in the oil, and a colorant, wherein the volatile organic solvent is selected from the group consisting of 1-methoxy-2-propanol, n-propoxypropanol, 1-methoxy-2-propyl acetate, ethyl lactate, and combinations thereof, and the oil has a solubility of from about 2% by weight to about 20% by weight of the volatile organic solvent, and the oil is chosen such that it will phase separate when it reaches its solubility limit if the volatile organic solvent is lost due to evaporation.
An ink composition comprising a volatile organic solvent, an oil, one or more binder resins which are insoluble or substantially insoluble in the oil, and a colorant, wherein the ink composition is suitable for ink jet printing and is a single phase liquid and the oil is present in an amount of up to about 8% by weight of the ink composition, and the oil has a solubility of from about 2% by weight to about 20% by weight of the volatile organic solvent, and the oil is chosen such that it will phase separate when it reaches its solubility limit if the volatile organic solvent is lost due to evaporation.
An ink composition comprising a volatile organic solvent, an oil, one or more binder resins which are soluble in the volatile organic solvent, and a colorant, wherein the ink composition is suitable for ink jet printing and is a single phase liquid, wherein the oil is present in an amount of up to about 8% by weight of the ink composition, and wherein the binder resin is selected from the group-consisting of polyvinyl acetate, hydrocarbon resins, and combinations thereof.
Dependencies are inferred from the claim text.