摘要:
Disclosed are a resin-filled ferrite carrier core material for an electrophotographic developer, including a porous ferrite particle, wherein the composition of the porous ferrite particle is represented by the following formula (1), and part of (MgO) and/or (Fe2O3) in the following formula (1) is replaced with SrO; a ferrite carrier obtained by filling a resin in the voids of the ferrite carrier core material; and an electrophotographic developer using the ferrite carrier: ( MgO ) x ( Fe 2 O 3 ) y ( x = 10 mol % or more and less than 25 mol % y = exceeding 75 mol % and 90 mol % or less x + y = 100 mol % ) . ( 1 )
摘要翻译:公开了一种用于电子照相显影剂的树脂填充的铁氧体载体芯材,其包括多孔铁氧体颗粒,其中多孔铁氧体颗粒的组成由下式(1)表示,部分(MgO)和/或(Fe 2 O 3 )用SrO代替; 通过将树脂填充在铁氧体载体芯材料的空隙中而获得的铁氧体载体; 和使用铁素体载体的电子照相显影剂:(MgO)x(Fe 2 O 3)y(x = 10, 25%y y =less x x x x x x )。 (1)
摘要:
A resin-filled carrier for an electrophotographic developer obtained by filling resin into voids of a porous ferrite core material, wherein the porous ferrite core material has a pore volume of 0.04 to 0.16 mL/g and a peak pore size of 0.9 to 2.0 μm, and an electrophotographic developer using this resin-filled carrier.
摘要:
Employed are a resin-filled ferrite carrier for an electrophotographic developer filled with a resin in voids of a porous ferrite core material, wherein the resin filled in the voids is a silicone resin which has a softening point of 40° C. or above and is cured at or above such softening point, and the filled amount is 7 to 30 parts by weight based on 100 parts by weight of the core material, a method for producing thereof band an electrophotographic developer using this ferrite carrier.
摘要:
Disclosed are a ferrite carrier for electrophotographic developer and an electrophotographic developer using the ferrite carrier, wherein: the ferrite carrier is a composite ferrite composed of Li and Mg; when the composition of the ferrite is calculated as a mixture of a Li ferrite having a stoichiometric composition and a Mg ferrite having a stoichiometric composition, the excessive amount of Fe2O3 is less than 5 mol %, or the total excessive amount of Li2O and MgO is less than 1 mol %; the content of the elements other than Li, Mg, Fe and O is 2% by weight or less; and further, the content of Mn in terms of element is 1000 to 9000 ppm.
摘要翻译:公开了一种用于电子照相显影剂的铁氧体载体和使用铁氧体载体的电子照相显影剂,其中:铁氧体载体是由Li和Mg组成的复合铁氧体; 当铁氧体的组成被计算为具有化学计量组成的Li铁氧体和具有化学计量组成的Mg铁氧体的混合物时,过量的Fe 2 O 3 O 3 小于5摩尔%,或总过量的Li 2 O和MgO小于1摩尔%; Li,Mg,Fe和O以外的元素的含量为2重量%以下; 此外,Mn的元素含量为1000〜9000ppm。
摘要:
A resin-filled carrier for an electrophotographic developer obtained by filling resin into voids of a porous ferrite core material, wherein the porous ferrite core material has a pore volume of 0.055 to 0.16 mL/g and a peak pore size of 0.20 to 0.7 μm, and an electrophotographic developer using this resin-filled carrier.
摘要:
Disclosed are a ferrite carrier for electrophotographic developer and an electrophotographic developer using the ferrite carrier, wherein: the ferrite carrier is a composite ferrite composed of Li and Mg; when the composition of the ferrite is calculated as a mixture of a Li ferrite having a stoichiometric composition and a Mg ferrite having a stoichiometric composition, the excessive amount of Fe2O3 is less than 5 mol %, or the total excessive amount of Li2O and MgO is less than 1 mol %; the content of the elements other than Li, Mg, Fe and O is 2 % by weight or less; and further, the content of Mn in terms of element is 1000 to 9000 ppm.
摘要翻译:公开了一种用于电子照相显影剂的铁氧体载体和使用铁氧体载体的电子照相显影剂,其中:铁氧体载体是由Li和Mg组成的复合铁氧体; 当铁氧体的组成以具有化学计量组成的Li铁氧体和具有化学计量组成的Mg铁氧体的混合物计算时,过量的Fe 2 O 3小于5mol%,或者过量的Li 2 O和MgO是 小于1mol%; Li,Mg,Fe和O以外的元素的含量为2重量%以下; 此外,Mn的元素含量为1000〜9000ppm。
摘要:
A resin-coated carrier for an electrophotographic developer which comprises a carrier core coated with an acryl-modified silicone resin the silicone resin of which has a methyl group and other organic groups, the molar ratio of the methyl group to the total organic groups inclusive of the methyl group [methyl group/(methyl group+other organic groups)]being 64 mol % or higher and lower than 70 mol %, and the acrylic resin to silicone resin weight ratio ranging from 2/8 to 4/6.
摘要:
A ferromagnetic material powder comprising a magnetic oxide which is a complex of a magnetite phase and a ferrite phase, wherein the ferromagnetic material powder has a spinel crystal structure and a magnetoplumbite crystal structure, and in the spinel crystal structure, the content of Fe3+ in site A is 35 to 50% and the content of Fe2+ in site B is 30 to 45%, a carrier for an electrophotographic developer, a process for producing them and an electrophotographic developer.
摘要:
Object of the present invention is to provide a resin-coated carrier for an electrophotographic developer with reduced carrier weight, carrier beads carry over is prevented, and further, excellent in carrier strength and stable charging property in endurance printing. To achieve the object, the carrier having a coated resin layer on the surface of a porous ferrite core material and the pore volume and the peak pore size of the porous ferrite core material are 55 to 160 mm3/g and 0.2 to 0.7 μm, respectively, and an electrophotographic developer using the resin-coated carrier is adopted.
摘要:
A rubber composition containing (A) a mixture obtained by mixing (a1) 100 parts by weight of a highly saturated, ethylenically unsaturated nitrile-conjugated diene copolymer rubber whose copolymer chain contains not more than 30% by weight of conjugated diene units, and (a2) from 10 to 100 parts by weight of an ethylenically unsaturated monomer containing at least one carboxyl group, at least a proportion of the at least one carboxyl group being metal substituted such that a molar ratio of the at least one carboxyl group to the metal falls within a range of from 1/0.5 to 1/3; (B) an organic peroxide; and (C) a fatty acid amide, from 0.2 to 15 parts by weight of the (B) organic peroxide and from 0.5 to 20 parts by weight of the (C) fatty acid amide being added to 100 parts by weight of the (A) mixture.