Gloss-controlling toner compositions
AssigneeNexPress Solutions LLC
InventorPeter S. Alexandrovich
Life of this patent
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Abstract
A particulate toner composition comprises a dry blend of a low viscosity polymeric particulate toner component having a first selected melt viscosity and a first selected melt elasticity, and a high viscosity polymeric particulate toner component having a second selected melt viscosity and a second selected melt elasticity. The first and second melt viscosities and first and second melt elasticities are each selected so as to produce a lower variation in measured G60 gloss values as a function of fusing temperature for fused images formed from the dry blend toner composition than the corresponding variation in measured G60 gloss values for fused images formed from the low viscosity polymeric toner component of the composition.
Claims43
A particulate toner composition comprising:
- a combination of a low viscosity polymeric particulate toner component having a first selected melt viscosity and a first selected melt elasticity, and a high viscosity polymeric particulate toner component having a second selected melt viscosity and a second selected melt elasticity;
- wherein said first melt viscosity, said first melt elasticity, said second melt viscosity, and said second melt elasticity are each selected to lower the variation in measured G60 gloss values as a function of fusing temperature for fused images formed from said toner composition relative to the variation in measured G60 gloss values as a function of fusing temperature for fused images formed from said low viscosity polymeric toner component.
A process for forming a particulate toner composition that provides fused images having controlled gloss characteristics, said process comprising:
- combining a previously prepared low viscosity polymeric particulate toner component having a first selected melt viscosity and a first selected melt elasticity with a separately prepared high viscosity polymeric particulate toner component having a second selected melt viscosity and a second selected melt elasticity;
- wherein said first melt viscosity, said first melt elasticity, said second melt viscosity, and said second melt elasticity are each selected to lower the variation in measured G60 gloss values as a function of fusing temperature for fused images formed from said toner composition relative to the variation in measured G60 gloss values as a function of fusing temperature for fused images formed from said low viscosity polymeric particulate toner component.
A process for forming a fused image from a particulate toner composition that provides fused images having controlled gloss characteristics, said process comprising:
- forming an unfused toner image on a receiver sheet, said image comprising a combination of a low viscosity polymeric particulate toner component having a first selected melt viscosity and a first selected melt elasticity and a separate high viscosity polymeric particulate toner component having a second selected melt viscosity and a second selected melt elasticity;
- wherein said first melt viscosity, said first melt elasticity, said second melt viscosity, and said second melt elasticity are each selected to lower the variation in measured G60 gloss values as a function of fusing temperature for fused images formed from said toner composition relative to the variation in measured G60 gloss values as a function of fusing temperature for fused images formed from said low viscosity polymeric particulate toner component;
- and
- heating said unfused toner image on said receiver sheet to a fusing temperature sufficient to form a fused toner image on said receiver sheet.
Dependencies are inferred from the claim text.