Toner, and, developer, toner container, process cartridge,...

G - Physics – 03 – G

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Details

G03G 9/087 (2006.01) G03G 5/08 (2006.01)

Patent

CA 2539631

An object of the invention is to provide: a toner such that the toner corresponds to a low-temperature fixing system, is excellent in both of offset resistance and anti-heat preservability and especially, even after a large number of copies are to be produced over a long period, the toner does not aggregate to each other, deterioration of flowability, transferability, and fixing ability is extremely rare, the toner makes it possible to form stable images on any transferring medium without transfer errors and with good reproducibility, and further does not contaminate fixing unit and images; or the like. Therefore, provided is a toner which includes a toner material, wherein the toner satisfies the following formula: 0°C <= .DELTA.Tm <= 20°C where .DELTA.Tm represents Tma - Tmb, Tma (°C) is 1/2 flown-out temperature of the toner by a capillary type flow tester, and Tmb (°C) is 1/2 flown-out temperature of a melt kneaded mixture of the toner by the capillary type flow tester, and wherein Tma is from 130°C to 200°C.

Un toner peut être appliqué à des systèmes de fixation basse température qui ont de bonnes qualités en termes d'anti-maculage et de capacités de stockage avec résistance aux températures, notamment en cas d'utilisation répétée pour des feuilles multiples pendant une période prolongée. Il ne présente pas d'agrégation de particules du toner et n'a qu'une faible détérioration de fluidité, de transférabilité et de capacité de fixation; indépendamment du type de support de transfert, il permet de former des images stables exemptes d'omissions de transfert, avec des performances de reproduction élevées, et ne tache les appareils de reproduction, les images ou similaire. L'invention concerne un toner comprenant des matériaux de toner caractérisées en ce que Tma ( DEG C) correspond à 1/2 de température du flux sortant, mesurée avec un testeur de flux de type Koka, du toner, et en ce que Tmb ( DEG C) correspond à 1/2 de température du flux sortant, mesurée avec un testeur de flux de type Koka, de la matière à pétrir en fusion du toner, le rapport 0 DEG C </= DELTA Tm (où DELTA Tm = Tma - Tmb) </= est satisfait, et où Tma est compris entre 130 et 200 DEG C.

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