Abstract: A composite material is provided. In some aspects, the composite material may include a combination of a thermoplastic resin mixed with a polypropylene-graft-maleic anhydride (PPgMA). Carbon particles may be mixed in the combination. In this way, the composite material may include between 80 wt. % and 90 wt. % of the thermoplastic resin, between 0.5 wt. % and 15 wt. % of PPgMA, and between 0.1 wt. % to 7 wt. % of carbon particles. Carbon particles may have exposed carbon surfaces with carbon atoms bonded to molecular sites on adjacent PPgMA molecules. At least some carbon atoms may be oxidized with one or more of oxygen-containing groups. Oxidation of carbon atoms may be associated with an increase in at least some PPgMA molecules chemically bonding with adjacent carbon atoms per unit volume. In this way, interaction between carbon atoms and PPgMA molecules may maintain composite material density within +/?3% of thermoplastic resin density.

Abstract: Herein is described a liquid electrophotographic a printing apparatus comprising: a photoconductor; a liquid electrophotographic ink developer unit for applying liquid electrophotographic ink to the photoconductor; a cleaner roller contactable with the photoconductor, the cleaner roller comprising an open-celled foam material having thereon a coating comprising abrasive particles and a binder. Also described herein is a cleaner roller for cleaning a liquid electrophotographic printing apparatus' photoconductor and a method of operating a liquid electrophotographic printing apparatus using a cleaner roller described herein.

Abstract: A method for continuously producing a composite material is disclosed. In some implementations, the method includes supplying a thermoplastic resin having an initial density, mixing polypropylene-graft-maleic anhydride (PPgMA) formed of a plurality of interconnected PPgMA molecules throughout the thermoplastic resin, distributing a plurality of carbon particles throughout the thermoplastic resin and the plurality of interconnected PPgMA molecules, and forming, by rotational molding, the composite material based on a combination of the thermoplastic resin, the PPgMA, and at least some of the plurality of carbon particles.

Abstract: A method for continuously producing a composite material is disclosed. In some implementations, the method includes supplying a thermoplastic resin having an initial density, mixing polypropylene-graft-maleic anhydride (PPgMA) formed of a plurality of interconnected PPgMA molecules throughout the thermoplastic resin, distributing a plurality of carbon particles throughout the thermoplastic resin and the plurality of interconnected PPgMA molecules, and forming, by rotational molding, the composite material based on a combination of the thermoplastic resin, the PPgMA, and at least some of the plurality of carbon particles.

Abstract: A composite material is provided. In some aspects, the composite material may include a combination of a thermoplastic resin mixed with a polypropylene-graft-maleic anhydride (PPgMA). Carbon particles may be mixed in the combination. In this way, the composite material may include between 80 wt. % and 90 wt. % of the thermoplastic resin, between 0.5 wt. % and 15 wt. % of PPgMA, and between 0.1 wt. % to 7 wt. % of carbon particles. Carbon particles may have exposed carbon surfaces with carbon atoms bonded to molecular sites on adjacent PPgMA molecules. At least some carbon atoms may be oxidized with one or more of oxygen-containing groups. Oxidation of carbon atoms may be associated with an increase in at least some PPgMA molecules chemically bonding with adjacent carbon atoms per unit volume. In this way, interaction between carbon atoms and PPgMA molecules may maintain composite material density within +/?3% of thermoplastic resin density.

Abstract: A container may be formed from a composite material including a combination of thermoplastic resin and polypropylene-graft-maleic anhydride (PPgMA) mixed with one another, a plurality of carbon particles mixed in the combination, and a plurality of pores formed in at least some of the mixed carbon particles. In some instances, the carbon particles may include a first region having a relatively low concentration of carbon particles, and a second region having a relatively high concentration of carbon particles. In various implementations, the plurality of pores may be formed in at least some of the mixed carbon particles, the thermoplastic resin, and the PPgMA. In some aspects, at least some of the pores may be configured to be infiltrated by the PPgMA.

Abstract: Herein is described a liquid electrophotographic a printing apparatus comprising: a photoconductor; a liquid electrophotographic ink developer unit for applying liquid electrophotographic ink to the photoconductor; a cleaner roller contactable with the photoconductor, the cleaner roller comprising an open-celled foam material having thereon a coating comprising abrasive particles and a binder. Also described herein is a cleaner roller for cleaning a liquid electrophotographic printing apparatus’ photoconductor and a method of operating a liquid electrophotographic printing apparatus using a cleaner roller described herein.

Abstract: A composite material includes a combination including a thermoplastic resin mixed with a polypropylene-graft-maleic anhydride (PPgMA), and a plurality of carbon particles mixed in the combination. The plurality of carbon particles may include a first region having a relatively low concentration of carbon particles, and a second region having a relatively high concentration of carbon particles, at least some of the plurality of carbon particles having exposed carbon surfaces with carbon atoms bonded to molecular sites on adjacent PPgMA molecules and oxidized with one or more oxygen-containing groups. In some aspects, composite material further includes between 80 wt. % and 90 wt. % of the thermoplastic resin, between 0.5 wt. % and 15 wt. % of the PPgMA, and between 0.1 wt. % to 7 wt. % of carbon particles. The composite material may also include a plurality of pores, formed in the combination, and configured to be infiltrated by the PPgMA.

Abstract: In an example, a method includes rotating a print apparatus component to be cleaned about a first rotational axis. A cleaning element having a cleaning surface in contact with the print apparatus component may be driven such that the cleaning surface has a component of motion which is parallel to the first rotational axis in a contact region. A relative velocity of the cleaning element and the print apparatus component may be varied during a cleaning operation.

Abstract: There is provided a sponge cleaning roller for cleaning an electrophotographic printing drum, the sponge of the cleaning roller having a Shore 00 hardness of about 9 or greater and a porosity of about 38 ppi or greater.

Abstract: In an example, a method includes rotating a print apparatus component to be cleaned about a first rotational axis. A cleaning element having a cleaning surface in contact with the print apparatus component may be driven such that the cleaning surface has a component of motion which is parallel to the first rotational axis in a contact region. A relative velocity of the cleaning element and the print apparatus component may be varied during a cleaning operation.

Abstract: There is provided a sponge cleaning roller for cleaning an electrophotographic printing drum, the sponge of the cleaning roller having a Shore 00 hardness of about 9 or greater and a porosity of about 38 ppi or greater.

Abstract: The present disclosure relates to an electrophotographic printer comprising a photoconductive cylinder, and a cleaning element comprising an absorbent foam substrate. The absorbent foam substrate has an abrasive material disposed on at least an outer surface of the absorbent foam substrate. At least part of the outer surface of the absorbent foam substrate is engageable with the photoconductive cylinder.

Abstract: The present disclosure relates to an electrophotographic printer comprising a photoconductive cylinder, and a cleaning element comprising an absorbent foam substrate. The absorbent foam substrate has an abrasive material disposed on at least an outer surface of the absorbent foam substrate. At least part of the outer surface of the absorbent foam substrate is engageable with the photoconductive cylinder.

Abstract: Described herein is a two-component coating system. The two-component coating system may include a base component and a hardener component. The base component may include: up to 55 wt. % hydroxyl terminated polyester and/or hydroxyl terminated polyether; up to 3 wt. % hydroxyl terminated polysiloxane; and a solvent selected from aromatic hydrocarbons, ketones, esters and combinations thereof, wherein the hydroxyl terminated polyester and/or hydroxyl terminated polyether and the hydroxyl terminated polysiloxane are dissolved in the solvent. The hardener component may include: up to 80 wt. % polyisocyanate; and a solvent selected from aromatic hydrocarbons, ketones, esters and combinations thereof, wherein the polyisocyanate is dissolved in the solvent.

Abstract: Described herein is a two-component coating system. The two-component coating system may include a base component and a hardener component. The base component may include: up to 55 wt. % hydroxyl terminated polyester and/or hydroxyl terminated polyether; up to 3 wt. % hydroxyl terminated polysiloxane; and a solvent selected from aromatic hydrocarbons, ketones, esters and combinations thereof, wherein the hydroxyl terminated polyester and/or hydroxyl terminated polyether and the hydroxyl terminated polysiloxane are dissolved in the solvent. The hardener component may include: up to 80 wt. % polyisocyanate; and a solvent selected from aromatic hydrocarbons, ketones, esters and combinations thereof, wherein the polyisocyanate is dissolved in the solvent.

Abstract: Examples provide inkjet ink sets and related methods. An ink set may include a pre-treatment fixing fluid, an ink, and a post-treatment fluid including a wax and a binder present in the post-treatment fluid in a range of about 10 weight percent to about 30 weight percent.

Abstract: Examples provide inkjet ink sets and related methods. An ink set may include a pre-treatment fixing fluid, an ink, and a post-treatment fluid including a wax and a binder present in the post-treatment fluid in a range of about 10 weight percent to about 30 weight percent.

Abstract: A print method, print apparatus and printed medium include forming a black portion of an image from two inks. The first ink (62) includes first carbon black pigment units (66) and a first binder (68). The first carbon black pigment units (66) have a median dibutylphthalate absortion (DBP) of at least 95 cc/100 g. The first ink (62) has a first ratio of the first carbon black pigment units to the first binder. The second ink (64) includes second carbon black pigment units and a second binder. The second ink has a second ratio of the second carbon black pigment units to the second binder less than the first ratio. The first ink and the second ink together have a median total weight per unit area of at least 70 percent of an absorptive capacity of the print medium and overlap one another, wherein the second ink is at least 54 percent of the total weight per unit area.

Abstract: The present disclosure provides inks, ink sets, and method for manufacturing inkjet inks. The inkjet ink comprises a colorant; a liquid vehicle; a surfactant; and a polyurethane binder, the polyurethane binder including polymerized monomers of a polyether polyol, a diisocyanate, and an acid polyol, where the polyurethane binder has a Mw from about 35K to 50K and an acid number from 51 to 60.