摘要:
A dry type toner for electrophotography is disclosed which comprises as the main components (a) a coloring agent; and (b) a polyol resin serving as a binder agent in an effective amount, the polyol resin being prepared by subjecting a bisphenol-type epoxy resin containing epoxy groups, which may contain secondary hydroxyl groups, to reaction steps (1), (2) and (3), or steps (2) and (3), in any sequential combination, until substantially no epoxy groups remain in the polyol resin, wherein the reaction step (1) comprises a step of causing the epoxy groups in the bisphenol-type epoxy resin to react with a primary amine; the reaction step (2) comprising a step of causing the epoxy groups to react with a compound containing one active hydrogen capable of reacting with the epoxy groups; and the reaction step (3) comprising a step of esterifying at least part of the secondary hydroxyl groups or hydroxyl groups produced in the bisphenol-type epoxy resin by reaction step (1) and/or reaction step (2) by use of an esterifying agent.
摘要:
A magenta toner is disclosed, which comprises a coloring composition comprising a thioindigo pigment, and a xanthene dye having general formula (I) or a laked xanthene dye thereof, and a binder resin: ##STR1## wherein R.sup.1, R.sup.2, R.sup.5, R.sup.6, and R.sup.7 each represent hydrogen or a lower alkyl group; R.sup.3 and R.sup.4 each represent a lower alkyl group; and A.sup.- represents halogen.
摘要:
The present invention relates to the positively chargeable black toner particles which comprise binder resins, carbonblack as a main colorant, quaternary anmonium salt of the following formula (I) as a charge control agent and .beta.-form Cu-phthalocyanine as a stabilizing agent for chargeability of toner particles without being affected by the change of environmental conditions. ##STR1## Wherein R.sub.1 is C.sub.1 -C.sub.8 alkyl or benzyl, R.sub.2 and R.sub.3 are each C.sub.1 -C.sub.18 alkyl, R is C.sub.1 -C.sub.118 alkyl or benzyl, X is hydroxy or amino, and Y is hydoroxy or hydrogen; (c) .beta.-form Cu-phthalocyanine; and (d) carbonblack.The present invention further relates to the two component dry-type developer composed by the improved above said positively chargeable toner particles and the carrier particles coated with silicone polylmers which have the strong durability without being changed to a supent carrier particles for a use of long time period.
摘要:
A multi-color electrophotographic image formation method of a digital type for forming multi-color images is disclosed, in which latent electrostatic images corresponding to yellow, magenta, cyan and black images separated from an original image are developed with a yellow developer, a magenta developer, a cyan developer and a black developer, respectively to form visible yellow, magenta, cyan and black images, and the visible yellow, magenta, cyan and black images are fixed to an image receiving member, with the reflection image density (ID.sub.ref) and the transmission image density (ID.sub.tr) of the fixed black images formed by the black developer being in the relationship of ID.sub.ref .gtoreq.1.8.times.ID.sub.tr when the deposition of the black developer is in the range of 1.0 mg/cm.sup.2 or less.
摘要翻译:公开了一种用于形成多色图像的数字类型的多色电子照相图像形成方法,其中与原始图像分离的对应于黄色,品红色,青色和黑色图像的静电潜像用黄色显影剂,品红色 显影剂,青色显影剂和黑色显影剂,以形成可见的黄色,品红色,青色和黑色图像,并且将可见的黄色,品红色,青色和黑色图像固定到图像接收部件上,其中反射图像密度(IDref) 并且当黑色显影剂的沉积处于1.0mg / cm 2以下时,由黑色显影剂形成的固定黑色图像的透射图像浓度(IDtr)为IDref> / = 1.8xIDtr的关系。
摘要:
A triboelectric charge application member for imparting or applying electrostatic charge to a toner through the triboelectric charging thereof for developing electrostatic images with the charged toner to visible toner images. The triboelectric charge application member includes an overcoat layer comprising as the main component a polymer which comprises a fluoro-olefin compound and an unsaturated silicon compound as the monomer units of the polymer. The triboelectric charge application member may be carrier particles having the above overcoat layer and a toner transportation member having the overcoat layer, depending upon its application.
摘要:
A triboelectric charge application member for imparting or applying electrostatic charge to a toner through the triboelectric charging thereof for developing electrostatic images with the charge toner to visible toner images. The triboelectric charge application member includes an overcoat layer comprising as the main component a polymer which comprises a fluoro-olefin compound and an unsaturated silicon compound as the monomer units of the polymer. The triboelectric charge application member may be carrier particles having the above overcoat layer and a toner transportation member having the overcoat layer, depending upon its application.
摘要:
A toner includes a polyol-based resin having multiple hydroxyl groups in a molecular chain thereof in which a ratio of epoxy group to hydroxyl group is from 0.990 to 1.010. A stirring and transfer device satisfies 1000000≦α×β×γ≦16000000, wherein α represents a number of rotation per minute, β (mm) represents a pitch and γ (mm) represents a transfer path length of the stirring and transfer device. A temperature Tin (° C.) in a development device during stirring and transfer of a two component developing agent satisfies 3020 C.
摘要:
A toner for dry developing, containing a colorant and a binder and giving such a toner image on a transfer sheet upon fixation that has an image density I and a gross of G % when the toner deposits on the transfer sheet in an amount of M mg/cm.sup.2, wherein I, G and M have the following relationship:I=a.multidot.M+bwhere 0
摘要:
An apparatus for pulverizing solid particles including an impact-type pulverizing device, a mechanical-type pulverizing device and a piping system connected to the pulverizing devices such that the solid particles may be selectively pulverized in the impact-type pulverizing device and in the mechanical-type pulverizing device successively in this or reverse order.
摘要:
Disclosed is a developer containing toner and carrier, the toner containing as a binder resin a polyol resin having a plurality of OH groups in a molecule chain having an EX/OH ratio between epoxy groups (EX) and OH groups (OH) of 0.990 to 1.010. The rotational speed α, pitch β and conveyance path length γ of an stirring and conveying unit satisfies 1.0×106≦α×β×γ≦16.0×106. Toner base particles having an electrostatic property satisfies 1.5