A method for manufacturing pigmentary titanium dioxide particles coated with a SiO.sub.2 coating layer includes steps of (i) forming an aqueous dispersion containing rutile titanium dioxide particles having an average particle size of in a range of 7-1000 nm, (ii) introducing to said dispersion of step (i) a silicon containing compound and a base, (iii) adding to the dispersion obtained from step ii acid, (iv) repeating the steps ii and iii at least once. Finally, the pH of the dispersion is lowered to a value within the range from 1.9 to 9.0 before filtering and washing thus obtained product.

A developing roller having a rubber elastomer layer on the outer periphery of a shaft core metal, having a coating layer formed from a binder (A) and silicone rubber particles (B) on the surface of the rubber elastomer, and having an electrostatic capacitance of 4 to 20 nF; wherein the binder (A) is formed from a diluting solvent solution of a terminal hydroxyl group-containing prepolymer (a) obtained by reaction of an isocyanate compound, an isocyanurate modified product thereof and a reactive silicone oil, and an isocyanate compound and/or an isocyanurate modified product thereof (b). This developing roller suppresses banding by suppressing electrostatic capacitance even if the nip width between the developing roll and the photoreceptor changes due to distortion of peripheral members in the development apparatus, and stick slip (vibration) of gears.

A substrate with a switchable surface has been developed that can rapidly switch its surface character such as between two distinct liquid-repellent modes: (1) a superhydrophobic mode and (2) a slippery mode. Such surfaces have demonstrated adaptive liquid repellency and water harvesting capabilities.

A composition for providing a surface coating on a substrate surface, wherein the composition comprises: (i) Particles; (ii) Alubricant; and (iii) A solvent.

The present invention relates to a matte coating agent containing 1 to 150 parts by mass of resin particles A having a volume average particle diameter of 1 to 5 m, 1 to 150 parts by mass of resin particles B having a volume average particle diameter of 5 to 10 m, and 1 to 150 parts by mass of resin particles C having a volume average particle diameter of 10 to 20 m based on 100 parts by mass of a polyurethane resin, the total content of the resin particles A, the resin particles B, and the resin particles C being 3 to 250 parts by mass based on 100 parts by mass of the polyurethane resin, and the volume average particle diameter becoming larger sequentially from the resin particles A to the resin particles B to the resin particles C.

A non-impact printing device (301) comprising: a coating material (237) being curable and comprising a resin; the coating material comprising an amorphous resin portion in an amount of at least 30 w-% based on the overall amount of resin and comprising with respect to the entire amount of coating material less than 0.5 w-% of flow additive; a printing unit, in particular an electrophotographic printing unit, being configured for printing the coating material (237) so as to form a coating layer, wherein the coating layer forms at least part of a layer package comprising at least one layer; the non-impact printing device being configured for providing the layer package so as to define a surface structure with the layer package; wherein the surface structure is defined by a thickness variation of the layer package; wherein the thickness variation is in a range between 1 m and 1000 m, in particular in a range between 1 and 300 m, and is in particular more than 1 m, in particular more than 5 m, in particular more than 10 m and in particular more than 20 m.

A method of forming a digital print on a surface by applying powder of dry ink including colourants on the surface, bonding a part of the dry ink powder to the surface by a digital heating print head such that the digital print is formed by the bonded dry ink colourants and removing non-bonded dry ink from the surface.

The present invention provides a method comprising rotational molding a powdered polyolefin elastomer composition to form a skin, the composition formed by spray drying an aqueous polyolefin dispersion composition which is itself formed by melt blending a polyolefin composition comprising an olefin block copolymer, a dispersing agent, and water, wherein said aqueous dispersion preferably has a pH less than 12.

The present invention provides a paper ball-like graphene microsphere, a composite material thereof, and a preparation method therefor. Such paper ball-like graphene microspheres are obtained by chemically reducing graphene oxide microspheres to slowly remove oxygen-containing functional groups on the surface of the graphene oxide to avoid the volume expansion caused by rapid removal of the groups, thereby maintaining a tight bond between graphene sheets without separation; and removing the remaining small number of oxygen-containing functional groups and repairing defect structures in the graphene oxide sheets by means of high temperature treatment, such that the graphene structure becomes perfect at an ultrahigh temperature (2500 to 3000 C.) thereby further improving the bonding ability between the graphene sheets in the microspheres and achieving a dense structure.

The present application provides a composite material and a method for preparing the same. The present application can provide a composite material which comprises a metal foam and a polymer component and if necessary, further comprises a thermally conductive filler, and has other excellent physical properties such as impact resistance, processability and insulation properties while having excellent thermal conductivity.