摘要:
A magnetic recording medium having a non-magnetic base overlaid with a magnetic layer containing ferromagnetic particles and a binder is disclosed. The ferromagnetic particles are metal particles and the binder is composed of (a) carboxyl-containing vinyl chloride/vinyl acetate copolymer, (b) a polyurethane resin and (c) a polyisocyanate compound.
摘要:
A ferromagnetic powder and process for producing it are disclosed. The process involves providing reducing a nickel-doped or nickel-coated iron compound in a reducing gas to provide a reduced metal powder including nickel in an amount of 3 to 30 atomic % based on the atomic % of iron present in the reduced metal powder, and treating the reduced metal powder with an organic metal powder. The resulting ferromagnetic metal powder has excellent stability with respect to oxidation and has a high saturation magnetization.
摘要:
Ferromagnetic metal particles are disclosed, which have a silane compound on the surface thereof. The silane compound is represented by the formula:R.sub.n --Si--(OR').sub.4-nwherein R and R' each represent an alkyl group and n represents 2 or 3. The ferromagnetic metal particles have excellent oxidation stability and corrosion resistance. Furthermore, the ferromagnetic metal particles have good dispersibility within a binder when used in connection with producing a magnetic recording medium.
摘要:
A novel magnetic recording medium is provided comprising a non-magnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein at least one fatty acid amide compound represented by formula (I), at least one fatty acid ester represented by formula (II) and at least one fatty acid ester represented by formula (III) are provided in or on the magnetic layer: ##STR1## wherein R.sup.1 represents a C.sub.13-21 straight-chain saturated hydrocarbon group; ##STR2## wherein R.sup.2 represents a C.sub.12-21 straight-chain or branched saturated or unsaturated hydrocarbon group; and R.sup.3 represents a C.sub.1-10 straight-chain or branched saturated or unsaturated hydrocarbon group; ##STR3## wherein R.sup.4 represents a C.sub.12-21 straight-chain or branched saturated or unsaturated hydrocarbon group; R.sup.5 represents a C.sub.2-3 divalent hydrocarbon group; R.sup.6 represents a C.sub.1-10 straight-chain or branched saturated or unsaturated hydrocarbon group; and n represents an integer of from 1 to 10 where n may be the same or different when the magnetic layer contains two or more compounds represented by formula (III).
摘要:
A method for preparing a magnetic recording medium comprising a non-magnetic support having coated thereon a magnetic layer of a magnetic coating composition containing ferromagnetic metal particles and a binder, comprising at least (1) a step of mixing and dispersing ferromagnetic metal particles, a binder, and a solvent to prepare magnetic coating composition, (2) a step of adding and mixing lubricating agent therewith and (3) a step of coating the resulting magnetic coating composition on a non-magnetic support.
摘要:
To enable determining the correlation between customer satisfaction and employee satisfaction, a speech acquisition unit 102 acquires conversations between employees and customers; an emotion recognition unit 155 recognizes employee and customer emotions based on employee and customer speech in the conversation; a satisfaction calculator 156, 157 calculates employee satisfaction and customer satisfaction based on the emotion recognition output from the emotion recognition unit 155; and a customer service data recording unit 159 relates and records employee satisfaction data denoting employee satisfaction and customer satisfaction data denoting customer satisfaction as customer service data in a management server database DB.
摘要:
A degree of fraud calculating device, a control method for a degree of fraud calculating device, and a store surveillance system can detect fraudulent activity with a high degree of accuracy. A fraud pattern storage unit 71 that stores a fraud pattern, which sets a basic score that is a weight factor for one or more elements of fraud anticipated in the store; a fraud detection unit 72 that detects if one or more the fraud elements occur; a degree of fraud calculating unit 73 that calculates a degree of fraud by summing the basic scores of the fraud elements detected by the fraud detection unit to have occurred; and a degree of fraud recorder 74 that records the calculated results output by the degree of fraud calculator 73 in a fraud database 23.
摘要:
A magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a magnetic layer containing a ferromagnetic powder and a binder, wherein the magnetic layer contains at least one of .alpha.-Al.sub.2 O.sub.3 and Cr.sub.2 O.sub.3 in an amount of 5 to 15% by weight based on the weight of the ferromagnetic powder, the density of at least one of .alpha.-Al.sub.2 O.sub.3 and Cr.sub.2 O.sub.3 in the surface of the magnetic layer is less than 0.25/.mu.m.sup.2, the intensity ratio of Al spectrum to Fe spectrum as determined by ESCA is in the range of 0.05 to 0.20, or the intensity ratio of Cr spectrum to Fe spectrum as determined by ESCA is in the range of 0.02 to 0.08, and the magnetic layer contains a fatty acid or a fatty acid ester, and the fatty acid or fatty acid ester is orientated in the surface of the magnetic layer. And further a process for producing the above magnetic recording medium is disclosed.
摘要翻译:公开了一种磁记录介质,其包括其上具有含有铁磁性粉末和粘合剂的磁性层的非磁性载体,其中所述磁性层含有以重量计5至15%的量的α-Al 2 O 3和Cr 2 O 3中的至少一种 铁磁粉末的重量,磁性层表面中的α-Al2O3和Cr2O3中的至少一种的密度小于0.25 /μm2,通过ESCA测定的Al光谱与Fe光谱的强度比在 或者通过ESCA测定的Cr光谱与Fe光谱的强度比在0.02〜0.08的范围内,磁性层含有脂肪酸或脂肪酸酯,脂肪酸或脂肪酸 酯定向在磁性层的表面。 并且还公开了制造上述磁记录介质的方法。
摘要:
A magnetic recording medium is described, comprising a non-magnetic support and a magnetic layer, said magnetic layer containing as a binder at least one compound selected from each of compound groups (A) and (B) that has been exposed to radiation, wherein(A) is polyvinyl chloride type compounds containing at least one polar group and at least one carbon-carbon unsaturated bond per molecule; and(B) is polyurethane type compounds containing at least one --CO.sub.2 H group and at lease one carbon-carbon unsaturated bond per molecule.
摘要:
Corrosion resistant ferromagnetic metal powders in which a volatile corrosion inhibitor is adsorbed on at least a part of the surface of ferromagnetic metal powders having an average particle size of 1000 A or less are disclosed. A method of preparing the corrosion resistant ferromagnetic metal powders is also disclosed.