摘要:
A method of slot extrusion coating is provided that can be used to apply thin coatings using liquid compositions having high percent solids. A window of operability advantageously identifies the limits of a process to provide these thin high solids coatings. The window of operability is determined by obtaining a first graphical curve representing actual values of wet thickness as a function of percent solids level. The critical wet thickness is then identified on the first graphical curve. The window of operability is identified as an area defined by the boundaries: percent solids greater than the point at which critical wet thickness occurs, an actual wet thickness greater than all points above the first graphical curve and equal to or less than the critical thickness.
摘要:
A pattern of an electrically conductive print material is formed on a receiver element using an elastomeric relief element that has a relief pattern comprising (1) an uppermost relief surface, and (2) an average relief image depth of at least 50 μm relative to the uppermost relief surface. A printable material composition is applied to the uppermost relief surface, which printable material composition contains an electrically conductive print material and a carrier liquid. At least 50 weight % of the carrier liquid is removed from the uppermost relief surface, leaving the electrically conductive print material on the uppermost relief surface. Either the elastomeric relief element or the printable material composition on the elastomeric relief element, or both, are treated with an acid in vapor or liquid form to improve conductivity of the electrically conductive print material after it has been transferred from the uppermost relief surface to the receiver element.
摘要:
A drying belt for electrophotographic imaging process comprising: (a) a seamless substrate; and (b) an absorbent layer on the seamless substrate wherein the absorbent layer comprising an absorbing material for carrier liquid of an electrophotographic toner.
摘要:
A method of drying carrier liquid from a toner image on a photoreceptor or from a photoreceptor after transfer to a final substrate comprises providing an electrophotographic apparatus comprising at least a) a photoreceptor, b) a continuous absorbent drying sheet having a beginning and an end, the beginning attached to a take-up roll or spool and the end attached to a supply roll or spool, the intermediate portion thereof coiled around the supply spool with at least a portion of the sheet contacting the photoreceptor. The process includes providing a toned image on the photoreceptor; contacting the continuous absorbent drying sheet to the toned image on the photoreceptor, or to the photoreceptor itself after the image is transferred away, creating a used portion of the continuous absorbent drying sheet; and simultaneously disbursing fresh length of the continuous absorbent drying sheet and taking-up the used portion of the continuous drying sheet.
摘要:
A liquid electrophotographic imaging apparatus contains at least one drying sheet for removing excess carrier liquid in a liquid toner toned latent image on a photoconductor surface. The drying sheet comprises a flexible substrate having a first surface and second surface; at least one oleophilic carrier liquid absorptive layer on the first surface of the flexible substrate; and the first surface of the flexible substrate facing said photoconductor surface, latent image or liquid toned latent image. The apparatus may perform a process of providing a toned image on the photoconductor with a liquid toner; contacting an absorbent drying sheet from the supply container to the toned image on the photoconductor or to the photoconductor itself after the image is transferred away; absorbing liquid carrier with the drying sheet, the drying sheet then becoming a used drying sheet; determining whether the used drying sheet is suitable for reuse as an absorbent drying sheet; and placing the used drying sheet in a container.
摘要:
Dry electrographic toner compositions are provided comprising a plurality of dry toner particles, wherein the toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The dry electrographic toner composition comprises a wax associated with the dry toner particles that has been entrained in the toner particle during the formation of the amphipathic copolymer. Methods of making the electrographic toner compositions are also provided. These toner compositions provide images having excellent durability and erasure resistance properties at low fusion temperatures and with little undesired offset.
摘要:
The invention provides liquid electrographic toner compositions comprising a liquid carrier having toner particles dispersed in the liquid carrier. The liquid carrier has a Kauri-Butanol number less than about 30 mL. The toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The toner composition additionally comprises a wax component associated with the toner particle, wherein the wax component and the amphipathic copolymer each comprise at least one of a Lewis acid and a Lewis base pair in an amount sufficient to form weak, reversible intermolecular non-covalent bonds resulting from acid/base interactions between the wax component and the amphipathic copolymer.These toner particles can exhibit excellent final image durability characteristics, and can also provide toner compositions that provide excellent images at low fusion temperatures on a final image receptor.
摘要:
A method and apparatus of the invention includes a method of removing airborne hydrocarbons from liquid electrophotographic printer exhaust comprises generating airborne hydrocarbon droplets as either vapor or mist during the transportation of electrophotographic ink or toner, directing substantially all of the air and hydrocarbon droplet mixture to a central collection point, forcing the air/droplet mixture to and through an oleophilic, substantially non-leaching collection media, and exhausting substantially hydrocarbon-free air from the electrophotographic printer. The method may further comprise inducing pressure in the printer with air pressure reduction to pull the exhaust through the collection media, for example with a pump or fan used to produce air pressure reduction. The method may comprise inducing airflow in the printer with ventilation holes or by the addition of a fan to provide a fresh air inlet. The air/hydrocarbon mixture may be directed to the collection media by a transportation system.
摘要:
A print material pattern is formed on a receiver element using an elastomeric relief element having a relief pattern. A printable material composition is applied only to the uppermost relief surface of the elastomeric relief element and at least at least 50 weight % of a carrier liquid is removed. A receiver element has a print material receptive layer having a dry thickness of 0.05-10 μm and is heated. During contact of the print material composition on the uppermost relief surface and the heated receiver element, the elastomeric relief element is compressed to provide sufficient contact with the receiver element. The elastomeric relief element is then separated from the heated receiver element to leave a pattern of the functional material on the heated receiver element, wherein at least 70 weight % of the original print material is transferred to the heated receiver element.
摘要:
A multilayer structure having at least two different print materials pattern is formed on a receiver element using an elastomeric relief element having a relief pattern. Multiple different printable material compositions are sequentially applied only to the uppermost relief surface of the elastomeric relief element and at least at least 50 weight % of a carrier liquid is removed from each printable material composition. During contact of the multilayer structure on the uppermost relief surface and the receiver element, the elastomeric relief element is compressed by at least 10 μm of its original thickness. The elastomeric relief element is then separated from the receiver element to leave a pattern of the multilayer structure on the receiver element, wherein at least 70 weight % of the multiple print materials is transferred to the receiver element.