A toner is provided. The toner comprises a maleic-acid-modified polyolefin having a polypropylene block in a main chain and having a weight average molecular weight of 60,000 or more.

An image forming method is provided. The image forming method includes: forming an electrostatic latent image on an electrostatic latent image bearer; developing the electrostatic latent image on the electrostatic latent image bearer with a toner to form a toner image; transferring the toner image from the electrostatic latent image bearer onto a continuous resin film; fixing the toner image on the continuous resin film with a heat roller or a heat belt. The toner contains a maleic-acid-modified polyolefin having a polypropylene block in a main chain.

The present invention relates to a process for producing a toner for development of electrostatic images, including step (1) of mixing a releasing agent and a water dispersion of resin particles (A) to obtain a water dispersion of releasing agent particles; step (2) of mixing the obtained water dispersion of the releasing agent particles and a water dispersion of resin particles (B) to aggregate the releasing agent particles and the resin particles (B), thereby obtaining aggregated particles; and step (3) of coalescing the obtained aggregated particles to obtain coalesced particles, in which the resin particles (A) include a composite resin including a segment (a1) constituted of a polyester resin and a vinyl-based resin segment (a2) containing a constitutional unit derived from a styrene-based compound; and a resin constituting the resin particles (B) includes a segment (b1) constituted of a polyester resin in an amount of not less than 50% by mass.

There is provided a toner including toner base particles and an external additive in which the external additive is prevented from being buried in the base particles. The toner can maintain a high transfer efficiency over an extended period of use. The toner includes: (1) toner base particles containing a cycloolefin copolymer and a polyethylene; or (2) toner base particles whose surfaces contain a resin having an elastic deformation rate of 70% or more and a melting temperature of 125.0° C. or less.

A toner includes a toner particle containing a resin component. The resin component contains an ester group-containing olefin copolymer and an acid group-containing olefin copolymer. For example, the ester group-containing olefin copolymer is an ethylene-vinyl acetate copolymer, and the acid group-containing olefin copolymer is an ethylene-methacrylic acid copolymer. The acid group-containing olefin copolymer has an acid value of 50 to 300 mg KOH/g. The content of the ester group-containing olefin copolymer in the resin component is 50 mass % or more based on the total mass of the resin component. The content of the unit derived from the vinyl acetate is 3 mass % or more and 35 mass % or less based on the total mass of the ester group-containing olefin copolymer.

By controlling the migration to the toner particle surface of the crystalline polyester present in the toner particle, a toner is provided that exhibits an excellent durability in long-term use, a stable charging performance after holding in a high-temperature, high-humidity environment, and an excellent low-temperature fixability, in which the toner having a toner particle that contains an amorphous resin, a crystalline polyester, and a wax, wherein the toner particle includes, at the surface thereof, a coat layer containing a cyclic polyolefin resin.

A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a semi-crystalline thermoplastic material and a charge control agent. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.

A resin binder composition for toners, containing a polyester resin A that is a polycondensate of an alcohol component containing 80% by mol or more of an aliphatic diol having 2 or more carbon atoms and 6 or less carbon atoms and a carboxylic acid component containing an aromatic dicarboxylic acid compound and an amorphous acid modified product A of an α-olefin polymer having 4 or more carbon atoms and 18 or less carbon atoms; and a toner for electrostatic image development, containing these resin binder composition for toners. The resin binder composition for toners of the present invention is suitably used for a toner for electrostatic image development which is usable in development of latent images formed in, for example, electrostatic image development method, electrostatic recording method, electrostatic printing method or the like.

An electrostatic charge image developing toner includes toner mother particles that contain a polyester resin which is a polycondensate of a polycarboxylic acid compound and a polyol compound; a graft polymer which includes a polyolefin chain and a vinyl resin chain; a coloring agent; and polyethylene wax, provided that the polyol compound includes a polyol compound having a bisphenol structure in an amount of 0 mol % to 5 mol %, wherein a normal temperature and normal humidity aggregation degree of the toner mother particles is from 70% to 97%.

A toner comprising a toner particle comprising a binder resin including a polyester resin, and a polyolefin resin having a sulfonic acid group, wherein the polyolefin resin having a sulfonic acid group is a polymer in which a vinyl polymer is bonded to a polyolefin, a content ratio of a monomer unit containing a sulfonic acid group in the vinyl polymer is from 1.0 mass % to 20.0 mass %, in a FT-IR spectrum obtained through measurement of a large particle size toner and a small particle size toner resulting from dividing, on a number basis, the toner into two substantially equal parts, a ratio of an intensity of a maximum absorption peak in a range from 1130 cm.sup.−1 to 1170 cm.sup.−1 with respect to an intensity of a maximum absorption peak in a range from 1713 cm.sup.−1 to 1723 cm.sup.−1 exhibits a specific relationship.