Abstract:
Disclosed are the nanoparticle and the method for the same, and the preparing method includes steps of mixing polyethylenimine (PEI) with the poly(acrylic acid)-bound iron oxide (PAAIO) to form a PEI-PAAIO polyelectrolyte complex (PEC) and mixing the PEI-PAAIO PEC with genetic material such as plasmid DNA to form the PEI-PAAIO/pDNA magnetic nanoparticle. The PEI-PAAIO/pDNA magnetoplex is highly water dispersible and suitable for long term storage, shows superparamagnetism, low cytotoxicity, high stability and nice transfection efficiency, and thus the PEI-PAAIO PEC can replace PEI as a non-viral gene vector.
Abstract:
A liquid-crystalline polymer composition containing a liquid-crystalline polymer and a magnetic filler formed by heat-treating a composite material of a ceramic powder and a soft magnetic metal powder in an inert gas atmosphere.
Abstract:
A method for manufacturing a rubber magnet with a colored facial gum material layer and a rubber magnet thereof. A colored gum material layer is paved on a surface of the rubber magnet. A surfactant is added into the colored gum material layer. An identical surfactant or a surfactant with very close polarity is added into the material of the rubber magnet, whereby the surfaces of the gum material layer and the rubber magnet can tightly adhere to each other without easy peeling. In addition, antiscaling agent, wetting/spreading agent and defoaming agent are added into the gum material layer to fully wet the color and uniformly spread the color over the gum material so as to enhance the evenness of the color.
Abstract:
The invention provides a rubber composition for a magnetic encoder being excellent in durability such as heat resistance, oil resistance and chemical resistance, having high magnetic characteristics and being excellent in processability and a magnetic encoder using the rubber composition. The magnetic rubber composition for the magnetic encoder includes a fluorinated rubber with a Mooney viscosity (ML1+10, 121° C.) of 20 to 100 and a magnetic powder, and the magnetic powder is blended in a proportion of 230 to 1900 parts by weight relative to 100 parts by weight of the fluorinated rubber. The magnetic encoder is provided by vulcanizing and molding the rubber composition.
Abstract:
A method for producing a permanently-magnetic part, made from a polymeric support material filled with magnetic filler materials on the basis of silicon caoutchouc, hot-vulcanized from at least one starting material, in which the at least one starting material of the silicon caoutchouc is mixed prior to vulcanization with 50 to 95% by weight of high energy ferrite particles of a density of 5.0 to 5.2 g/cm3 and an average particle size of 1.5 to 2.5 μm as the magnetic filler material and is homogenized. Subsequently, the homogenized mixture is introduced into a mold cavity by a temperature-regulated screw and is cross-linked by vulcanization in the mold cavity by the application of heat for forming the molding, wherein during cross-linking a static magnetic field is applied to the mold cavity and the magnetic filler materials are magnetized and aligned in the silicon caoutchouc being cross-linked.
Abstract translation:一种永久磁性部件的制造方法,由永久磁铁部件制成,其由填充有硅填充材料的聚合物支撑材料制成,其由至少一种起始材料热硫化,其中所述硅橡胶的至少一种起始材料 在硫化前将50〜95重量%的密度为5.0〜5.2g / cm 3,平均粒径为1.5〜2.5μm的高能铁氧体颗粒作为磁性填料进行混合并均化。 随后,将均质化的混合物通过温度调节的螺杆引入模腔中,并通过施加热量在模腔中通过硫化而交联成型,其中在交联过程中将静态磁场施加到 模具腔和磁性填充材料被磁化并对准在硅橡胶中交联。
Abstract:
A polymer composition with a polymer matrix material and magnetic particles. The composition is selectively electro-magnetically heatable by an electrical induction energy frequency that is pulse width modulated through variable time cycles to provide controlled heating.
Abstract:
Contaminants in food or pharmaceuticals derived from the handling equipment are detected by known detection devices in product flow by the method of detecting particulate magnetic mineral dispersed in the handling equipment or the film used to wrap the food. The minerals magnetic field is detected and the signal generated thereby causes rejection of the product which contains the contamination. A method of making moulded parts of the handling equipment and wrapping film by incorporation of ferrimagnetic ceramic fillers is disclosed. Compositions for moulding and film extrusion with 10-50% of magnetite and other magnetic fillers with a size range of 0.5-20μ are disclosed.
Abstract:
A rubber composition for magnetic encoder, which comprises ethylene-methyl acrylate copolymeric rubber, magnetic powder and an amine-based vulcanizing agent, can give molding products with distinguished heat resistance, water resistance and saline water resistance and can be used as effective vulcanization molding materials for magnetic encoder, particularly in use for wheel speed sensor. A higher mixing proportion of the magnetic powder can be added to the rubber component, so the resulting magnetic encoder can have a distinguished magnetic force.
Abstract:
The present invention relates to a rubber compound containing at least one hydrogenated carboxylated nitrile rubber, at least one hydrogenated nitrile rubber and at least one magnetic compound, a curable rubber compound containing said rubber compound and at least one vulcanization agent and a magnetic shaped article containing said rubber compound.
Abstract:
A magnetic rubber composition for encoder having a magnetic characteristic in sufficient application range, used as encoder after magnetization as well as heat resistance, water resistance and oil resistance required for use as encoder, and excellent processing property, and capable of being bonded by vulcanization with a metal, is provided. Furthermore, a magnetic rubber composition for encoder capable of obtaining sufficient magnetic force required for encoder on a circumference of the molded encoder as well as capable of effectively restraining variation of the level of magnetic force, is provided. It is provided by comprising 300 to 1,800 parts of strontium-ferrite, or 300 to 1,800 parts of barium-ferrite, or 300 to 1,800 parts of a mixture of strontium-ferrite and barium-ferrite, 0.5 to 2 parts of silane coupling agent, and 1 to 10 parts of lubricating agent, per 100 parts of a hydrogenated nitrile butadiene rubber with 15 to 50% of acrylonitrile amount and 80 to 99% of hydrogenation ratio.