Solid ink jet ink
First Claim
1. A solid ink jet composition comprising a carrier having an electrical resistivity of at least 108 Ohm.cm, insoluble marking particles and a particle charging agent dispersed therein, wherein said marking particles are capable of being agglomerated and ejected from the bulk ink as discrete droplets in the presence of an electrostatic field when the viscosity of the ink is reduced.
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Accused Products
Abstract
A solid ink jet ink composition which is suitable for hot melt applications having a carrier having an electrical resistivity of at least 108 Ohm.cm, insoluble marking particles and a particle charging agent dispersed in it. The marking particle may be a pigment, an insoluble dyestuff, a polymer or mixture thereof. The particle charging agent may be a metal soap, a fatty acid, lecithin, an organic phosphorous compound, a succinimide, a sulphosuccinate, petroleum sulphonates, a soluble or partially soluble resin such as a modified rosin ester, an acrylic, a vinyl a hydrocarbon or a mixture thereof. The solid ink jet ink composition may further include a viscosity controller. The ink may be capable of being heated to 155° C. and have at that temperature a viscosity of between 5 to 150 cps.
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Citations
19 Claims
- 1. A solid ink jet composition comprising a carrier having an electrical resistivity of at least 108 Ohm.cm, insoluble marking particles and a particle charging agent dispersed therein, wherein said marking particles are capable of being agglomerated and ejected from the bulk ink as discrete droplets in the presence of an electrostatic field when the viscosity of the ink is reduced.
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12. A solid ink jet composition comprising a carrier having an electrical resistivity of at least 108 Ohm.cm, insoluble marking particles and a particle charging agent, wherein the ink has a viscosity in the range of 5 to 150 cps at 155°
- C. and the particle charging agent is selected from the group consisting of metal soaps, fatty acids, lecithin, organic phosphorous compounds, succinimides, sulphosuccinates, petroleum sulphonates, soluble or partially soluble resins, and mixtures thereof.
- View Dependent Claims (16)
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13. A solid ink jet composition comprising a carrier having an electrical resistivity of at least 108 Ohm.cm, insoluble marking particles and a particle charging agent, wherein the ink is capable of being heated to 135°
- C. and has a viscosity in the range of 20 to 50 cps at that temperature and the particle charging agent is selected from the group consisting of metal soaps, fatty acids, lecithin, organic phosphorous compounds, succinimides, sulphosuccinates, petroleum sulphonates, soluble or partially soluble resins, and mixtures thereof.
- View Dependent Claims (17)
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14. A solid ink jet ink comprising;
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(a) 80 to 98.9% of a carrier having an electrical resistivity of at least 108 Ohm.cm and which is solid at room temperature and which has a viscosity in the range of 5 to 150 cps at 155°
C.,(b) 1 to 10% of insoluble marking particles, and (c) 0.1 to 5% of a particle charging agent.
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15. A solid ink jet ink comprising;
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(a) 80 to 98.9% of a carrier which is solid at room temperature and which has a viscosity in the range of 5 to 150 cps at 155°
C.,(b) 1 to 10% of insoluble marking particles, and (c) 0.1 to 5% of a particle charging agent, the resultant ink having an electrical resistivity of at least 108 Ohm.cm.
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Specification