摘要:
A magnetic recording medium is disclosed, which has a magnetic layer on a non-magnetic support, wherein at least a mixture of ester compounds shown by formula (I) obtained by the reaction of a straight chain or branched fatty acid having from 12 to 30 carbon atoms and branched alcohols having from 10 to 32 carbon atoms synthesized by oxo synthesis is retained in or on the magnetic layer: ##STR1## wherein R.sub.1 represents a straight chain or branched alkyl group having from 11 to 29 carbon atoms or a straight chain or branched alkenyl group having from 11 to 29 carbon atoms, and R.sub.2 represents a branched alkyl group having from 10 to 32 carbon atoms. The magnetic recording medium has an excellent running durability in wide ranges of temperature and humidity condition.
摘要:
A magnetic recording medium comprising a non-magnetic support having a magnetic layer thereon, wherein the surface of the magnetic layer contains (a) a first fluorinated polyether having an oxo acid group or an oxo acid salt group at one or both terminals thereof, and (b) a second fluorinated polyether having a group selected from a alkoxycarbonyl group, an acyloxy group and a hydroxyl group at one or both terminals thereof, or the polyether (a) and polyether (b) are incorporated into the magnetic layer.
摘要:
An abrasive tape comprises a flexible substrate and an abrasive layer which is overlaid on the flexible substrate and which contains abrasive grains, a binder, and an additive. The additive contains at least one kind of a compound represented by the general formula of ##STR1## where R.sub.1 represents a monovalent hydrocarbon group having six to 30 carbon atoms, or a fluorine-substituted alkyl group having one to 17 carbon atoms, R.sub.2 represents H or a monovalent alkyl group having one to three carbon atoms, X represents either one of ##STR2## where R.sub.3 is C.sub.3 F.sub.7 and n is an integer of 1 to 30.
摘要翻译:研磨带包括柔性基底和覆盖在柔性基底上并含有磨料颗粒,粘合剂和添加剂的磨料层。 添加剂含有至少一种由通式为“IMAGE”表示的化合物,其中R1表示碳原子数为6〜30的一价烃基或碳原子数1〜17的氟取代烷基,R2表示H 或具有1至3个碳原子的一价烷基,X表示其中R 3为C 3 F 7且n为1至30的整数的之一。
摘要:
A process for producing a magnetic recording medium which comprises a step of kneading a ferromagnetic powder with a binder in the presence of a solvent, a step of dispersing the resulting blend with the binder and/or solvent, and a step of coating the resulting magnetic coating composition on a nonmagnetic support followed by drying;Wherein said step of kneading is carried out by kneading a ferromagnetic powder having a particle size of not more than 350 .ANG. with a glycidyl compound and a binder comprising at least a vinyl chloride copolymer having an OH- terminated side chain bonded via an organic group and also having a polar group and/or a solvent; said binder, polyurethane resin, and solvent being used in a total amount of from 40 to 70 parts by weight per 100 parts by weight of said ferromagnetic powder; and wherein said step of dispersing is carried out in the presence of additional polyurethane resin having a polar group and/or solvent.
摘要:
A method for manufacturing a magnetic recording medium is disclosed, comprising ferromagnetic alloy powders having an average length in the long axis of 0.3 .mu.m or less and a specific surface area (BET Method) of 45 m.sup.2 /g or more, by steps which comprise surface-treating the ferromagnetic alloy powders with at least one triazine thiol compound, dispersing the surface-treated powders in a binder, and then coating the binder containing the surface-treated powders on a nonmagnetic support, wherein the ferromagnetic alloy powders are surface-treated with a triazine thiol compound represented by formula (I) in a condition in which the moisture content of the ferromagnetic alloy powders is 0.5 wt % or less, in a system of substantially excluded moisture: ##STR1## wherein R represents R.sub.1 O--, R.sub.1 S--, R.sub.1 NH--, or R.sub.1 R.sub.2 N--R.sub.1 --, R.sub.1 and R.sub.2, which may be the same or different, each represents an alkyl, alkenyl, aryl, aralkyl, cycloalkyl or alkanol group having from 1 to 18 carbon atoms, and M.sub.1 and M.sub.2, which may be the same or different, each represents H, alkali metal or ammonium.
摘要:
An adsorptive fiber sheet where a nonwoven fabric of synthetic fiber constituted only by synthetic fiber having a higher melting temperature is secured in a layered structure to at least one surface of a nonwoven fabric of adsorptive fiber which is produced in such a manner that synthetic fiber having a higher melting temperature, synthetic fiber having a lower melting temperature and adsorptive fiber are mixed with one another and contact points between the synthetic fiber having a lower melting temperature and other fibers are bound together by softening the synthetic fiber having a lower melting temperature. Both the synthetic fabrics are placed one above another in a layered structure by allowing synthetic fiber having a lower melting temperature to be softened to bind or by allowing fibers to be entangled with one another in such a manner that no separation takes place therebetween.
摘要:
An optical scanning device includes an oscillating mirror portion having a reflection surface, and a frame portion holding the oscillating mirror portion. The optical scanning device reflects an incident optical flux by the reflection surface so as to convert the incident optical flux into a scanned optical flux. The optical scanning device further includes a reflection portion having a first reflection surface and a second reflection surface which are arranged in substantially V-shaped inclined surfaces. The first reflection surface reflects the incident optical flux and radiates the reflected light toward the oscillating mirror portion. The second reflection surface receives the reflected light from the oscillating mirror portion and radiates the reflected light as the scanned optical flux.
摘要:
An apparatus for use in optical scanning is disclosed which vibrates at least a part of a vibrating body having a light-reflective surface, to thereby allow light, upon entry, to be reflected from the light-reflective surface in varying directions. The vibrating body includes: (a) a reflective mirror having the light-reflective surface; and (b) an integral spring extending from the reflective mirror and being excited to generate at least a torsional vibration. The vibrating body has vibrational characteristics in which whether or not a resonant frequency of the torsional vibration and a resonant frequency of a disturbing vibration are equal to each other depends upon a shape-defining parameter for defining a shape of the integral spring extending lengthwise. The shape-defining parameter is pre-set to fall within a range allowing the resonant frequency of the torsional vibration and the resonant frequency of the disturbing vibration to be different from each other.
摘要:
A mirror driver is disclosed which includes: a mirror having a reflective surface reflecting incident light thereon; a pair of mechanical beams diametrically opposed to each other with the mirror inbetween as viewed along a reference line parallel to the reflective surface; an actuator imparting bending motions to the pair of beams, respectively; and a pair of joints integrally coupling the pair of beams and the mirror to each other, with less rigidity to resist deformation than rigidity of the pair of beams and the mirror, for allowing conversion of the bending motions of the pair of beams into a rigid-body motion of the mirror without inducing an angular oscillation about the reference line.
摘要:
A metal thin layer type magnetic recording medium is disclosed, comprising a non-magnetic support having formed thereon (1) a ferromagnetic metal thin layer or (2) a ferromagnetic metal thin layer and a protective layer formed on the ferromagnetic metal thin layer, wherein a layer comprising a polymer of at least one chain or cyclic silicone compound which is formed on the surface of the ferromagnetic metal thin layer or the protective layer by bringing the silicone compound into contact with the surface in the vapor phase is provided on the surface; the atomic number ratio (Si.sub.2p /Co.sub.2p.sup.3/2) of Si in the polymer is from 0.02 to 0.30; and the silicone compound is represented by formula (I):(R.sup.1 HSiO).sub.a (R.sup.2 R.sup.3 SiO).sub.b (R.sup.4 R.sup.5 R.sup.6 SiO.sub.1/2).sub.c (I)wherein R.sup.1, R.sup.2, and R.sup.3 each represents a hydrogen atom or a substituted or unsubstituted hydrocarbon group having from 1 to 10 carbon atoms, R.sup.1, R.sup.2, and R.sup.3 simultaneously are not a hydrogen atom; R.sup.4, R.sup.5, and R.sup.6 each represents a hydrogen atom or a substituted or unsubstituted hydrocarbon group having from 1 to 10 carbon atoms; a and b each represents an integer of 0 or more; and c represents 0 or 2, when c is 0, the silicone compound is a cyclic compound, when c is 2, the silicone compound is a chain compound, and when c is 0, the sum of a and b is an integer of at least 3.