摘要:
Provided is a process for continuously producing a composite reverse osmosis membrane comprising a polyamide skin layer and a porous support for supporting the polyamide skin layer, the method comprising: A) applying an aqueous solution α containing a compound having two or more reactive amino groups to form a covering layer of an aqueous solution on the porous support while moving the porous support; B) permeating the aqueous solution α in micro pores of the porous support by holding the covering layer on the porous support for 0.2 to 15 seconds; C) removing the covering layer while holding the aqueous solution α within the micro pores of the porous support; and D) forming the polyamide skin layer by applying an organic solution β containing a polyfunctional acid halide onto the surface of the porous support to make the aqueous solution α contact the organic solution β for interfacial polymerization.
摘要:
A center take-off rack-and-pinion steering apparatus includes a cylindrical rack housing having an elongate hole extending in a longitudinal direction, a mounting bracket for mounting ends of a pair of tie rods on a rack shaft, and a slider interposed between the mounting bracket and the rack shaft and slidable in an inner periphery of the elongate hole. The inner periphery of the elongate hole and the slider include sliding contact sections that are brought into sliding contact with each other along with the slide of the slider slides. The sliding contact sections include at least a pair of curved sliding contact surfaces that are brought into sliding contact with each other in a curved shape when seen in an axial direction of the rack shaft.
摘要:
A steering apparatus includes an attaching bracket connecting end portions of a pair of tie rods to a rack shaft. The attaching bracket includes a base which is fixed to the rack shaft and includes at least one fixing member inserting hole through which a fixing member fixing the attaching bracket to the rack shaft is provided, and a supporting stay supporting the end portions of the pair of tie rods via ball joints respectively. The supporting stay extends from an intermediate portion of the base in an axial direction of the rack shaft. A center of the ball joint supporting the end portion of each of the tie rods is positioned offset from an axial line of the fixing member by a predetermined distance when viewed along the axial direction of the rack shaft.
摘要:
A reverse osmosis membrane that has alkali resistance, and therefore can maintain high boron rejection performance even at high pH region, and a method for producing the membrane are disclosed. The reverse osmosis membrane has an initial performance that a rate of change Rf (%) determined by the following equation is within ±10%: Rf(%)=((F1-F0)/F0)×100 wherein F0 is a permeation flux (m3/(m2/day)) at the initiation of operation when a sodium hydroxide aqueous solution adjusted to pH 12.0 as raw water is continuously circulated at 25° C. under pressure of 0.75 MPa, and F1 is permeation flux (m3/(m2/day)) after one week operation.
摘要:
The present invention provides a composite reverse osmosis membrane and a reverse osmosis membrane module using the same, having a high salt rejection, high water permeability, and a high rejection of organic substances such as isopropyl alcohol, which can be used to remove organic substances as well as ionic substances with suitable efficiency and economy. The highly permeable composite reverse osmosis membrane of the invention can be produced by adding alcohols or ethers or the like having a solubility parameter of 8-14 (cal/cm.sup.3).sup.1/2 to the solution containing at least one compound selected from the group consisting of a compound having two or more reactive amino groups and a polyfunctional acid halide having two or more reactive acid halide groups which is used when conducting the polycondensation of a compound having two or more reactive amino groups and a polyfunctional acid halide having two or more reactive acid halide groups on a microporous support.
摘要:
Disclosed are a composite semipermeable membrane which is excellent in the chlorine resistance and also gives a high desalting faculty and a large water flux, in particular, under a low operation pressure and a production method thereof. The composite semipermeable membrane comprises a porous base material having formed thereon a semipermeable thin film formed by crosslinking polymerization of 2,6-diaminotoluene monomer or a mixture of 2,6-diaminotoluene monomer and other amino compound monomer with a polyfunctional crosslinking agent having at least two functional groups capable of reacting with the amino group(s) of the monomer(s) in one molecule in the presence of an amine salt.
摘要:
A composite reverse osmosis membrane comprising a thin film and a microporous substrate as a support therefor, said thin film mainly comprising a crosslinked polyamide obtained by the interfacial polymerization of (a) an amine component comprising at least one monomeric amine compound having at least two primary or/and secondary amino groups and (b) an acid halide component which is either a benzenehexacarbonyl halide or a mixture of a benzenehexacarbonyl halide with a monomeric acid halide compound having at least two acid halide groups. The composite reverse osmosis membrane exhibits high water permeability and high desalting performance even when used at a low operation pressure of, e.g., 5 kgf/cm.sup.2.
摘要翻译:一种复合反渗透膜,其包含薄膜和微孔基材作为其载体,所述薄膜主要包含通过界面聚合获得的交联聚酰胺,所述交联聚酰胺通过(a)包含至少一种具有至少两个伯 或/和仲氨基,和(b)酰卤组分,其是苯六羰基卤化物或苯六羰基卤化物与具有至少两个酰卤基团的单体酰卤化合物的混合物。 即使在例如5kgf / cm 2的低操作压力下使用时,复合反渗透膜也具有高透水性和高脱盐性能。
摘要:
A method for manufacturing a luminous tube for discharge lamp including sealing, in a closed container having a stream of a desired gas introduced therein, components of a luminous tube by means of the photo energy of a laser light such that the desired gas, at a predetermined pressure, is sealed within the luminous tube.
摘要:
There is disclosed a method for forming a decorative metallic nitride coating on the surface of a substrate comprising the steps of disposing said substrate to be coated as a cathode in a material gas atmosphere at a pressure of 0.1 to 10 Torr, with said substrate maintained at a temperature of 200.degree. to 1000.degree. C., and applying a voltage of 200 to 8000 V to said substrate to prepare a direct current glow discharge space in the vicinity of said substrate, the improvement which comprises using as said material gas a mixed gas of a halide of titanium, zirconium or hafnium; hydrogen; and nitrogen, and controlling the current density of the electric current flowing through said substrate to be within the range of 0.01 to 1 mA/cm.sup.2.The method according to the present invention provides a uniform and beautiful metallic nitride coating which has a metallic luster stable with time, is excellent in mar resistance, and is suitable for decoration. Further, according to the method of this invention, a decorative metallic nitride coating capable of varying a tone on a metallic luster surface over a wide range can be formed.
摘要翻译:公开了一种在衬底表面上形成装饰性金属氮化物涂层的方法,包括以下步骤:将所述待涂覆的衬底作为阴极设置在材料气体气氛中,压力为0.1至10托,其中所述衬底保持在 温度为200〜1000℃,向所述基板施加200〜8000V的电压,在所述基板的附近配置直流辉光放电空间,其特征在于,使用作为所述原料气体的混合气体 的钛,锆或铪的卤化物; 氢; 和氮气,并且将流过所述基板的电流的电流密度控制在0.01至1mA / cm 2的范围内。 根据本发明的方法提供了一种均匀且美观的金属氮化物涂层,其具有随时间稳定的金属光泽,耐擦伤性优异,并且适于装饰。 此外,根据本发明的方法,可以形成能够在宽范围内改变金属光泽表面上的色调的装饰性金属氮化物涂层。
摘要:
An apparatus for forming a thin organic film on a substrate which includes a reaction chamber for receiving a substrate on which a thin organic film is to be formed; a microwave discharge tube for supplying the reaction chamber with a carrier gas activated by microwave discharge; a microwave-generating mechanism provided with a hollow resonator for a microwave discharge; and a mechanism for supplying a carrier gas to the microwave discharge tube and a mechanism for supplying the reaction chamber with an organic compound monomer to be polymerized. That region of the microwave discharge tube where a plasma is produced by discharge does not extend to the reaction chamber, but is completely separated therefrom.