Abstract:
The present invention provides a perfluoroelastomer seal material in which adhesive strength, contamination, corrosion and color change of a contacted surface with a seal material are improved, and an amount of an uncrosslinked polymer component is at most 1% by weight, measured under specific conditions, and a process for preparing the same. The present invention relates to a perfluoroelastomer seal material, wherein a rate of weight decrease is at most 1% by weight when the seal material is immersed into perfluoro(tri-n-butyl)amine at 60° C. for 70 hours and is dried at 90° C. for 5 hours, 125° C. for 5 hours and 200° C. for 10 hours after taken out of the emersion. And, the present invention also relates to a process for preparing a perfluoroelastomer seal material comprising a step of treating with a solvent having at least 50 % of a swelling rate based on said molded article, when said molded article is immersed at 60° C. for 70 hours.
Abstract:
A plurality of IDT electrodes 2 to 7 each having a large number of electrode fingers extending in a direction perpendicular to a propagation direction of a surface acoustic wave propagating on a piezoelectric substrate 1 are arranged on the piezoelectric substrate 1 along the propagation direction, and each of the two adjacent IDT electrodes out of the plurality of IDT electrodes 2 to 7 comprises a variable pitch section and a fixed pitch section. The electrode finger pitch in the variable pitch section gradually decreases toward the boundary between the two adjacent IDT electrodes, and the minimum electrode finger pitch portion in the two variable pitch sections is on one side spaced apart from the boundary. There can be provided a surface acoustic wave apparatus having a large pass bandwidth, having a low insertion loss, and having improved flatness in a pass band.
Abstract:
A method for manufacturing magnetic paint is provided, wherein a dispersion condition is appropriately controlled to excellently disperse a magnetic powder composed of fine particles adaptable for a higher recording density, so that magnetic paint having excellent dispersibility can be prepared, and a magnetic recording medium having excellent surface roughness is provided. The magnetic paint is prepared by the step of subjecting a mixed solution containing at least a binder, a solvent, and a magnetic powder to a dispersion treatment with a dispersion device by the use of dispersion media through at least dispersion step, wherein the dispersion in the main dispersion step is carried out by the use of dispersion media having an average particle diameter y (mm) satisfying the relationship, which is represented by formula y≦0.01x, with the average maximum diameter x (nm) of the magnetic powder.
Abstract:
In order to provide a polyester film having superior impact resistance and flex pinhole resistance, and further exhibiting superior gas barrier properties after a metal or metal oxide is deposited on the film, with the inherent characteristics of polyester film maintained, such as low hygroscopicity, dimensional stability, flatness, and transparency, the polyester film comprises a mixture of 70% to 97% by weight of polyester A mainly composed of a repeating unit comprising ethylene terephthalate and 3% to 30% by weight of polyester B mainly composed of a repeating unit comprising butylene terephthalate. The polyester film has a melting point in range of 245 to 270° C. The polyester film may comprise a polyester resin containing 90% to 60% by weight of an ethylene terephthalate component, 10% to 40% by weight of a butylene terephthalate component, and 0.1% to 5% by weight of a polyoxyalkylene glycol component. The polyester film is suitably used for packaging and other applications.
Abstract:
A toner for developing electrostatic images, comprising a binder resin and a colorant, the binder resin including a crystalline polyester resin and an amorphous resin. When, in differential scanning calorimetry of the toner according to ASTM D3418-8, the temperature of the endothermic peak derived from the crystalline polyester resin in a first heating process is defined as Tm1 (° C.), the endothermic quantity based on the endothermic peak in the first heating process is defined as ΔH1 (mW/g), and the endothermic quantity based on the endothermic peak in a second heating process is defined as ΔH2 (mW/g), Tm1 is 50 to 80° C, and ΔH1 and ΔH2 satisfy the relationship represented by the following Formula (1). When the softening temperature of the toner is defined as Tf1/2 (° C.), Tf1/2 is 85 to 135° C. Tm1 and Tf1/2 satisfy the relationship represented by the following Formula (2): 0.35≦ΔH2/ΔH1≦0.95 Formula (1) Tf1/2≦205−(1.4×Tm1) Formula (2).
Abstract:
The present invention relates to an image forming method wherein the surface of an electrophotographic photoreceptor contains a compound having an unsaturated double bond, a toner for electrostatic latent image development has a binder resin obtained by polymerizing a polymerizable monomer having a vinyl double bond, has at least one kind of metal oxide particles and/or metal nitride particles on the surface of the toner and has a shape factor SF1 of 110 to 140, and the storage of elastic modulus at 160° C. (G′(160)) of the toner for electrostatic latent image development is in a predetermined range.
Abstract:
The biaxially oriented polyester film of the present invention contains a polyester having a primary melting point of 245 to 265° C. as the main component and exhibits a drop bag strength index at 0° C. of at least 2.0 and a strength at break in the film longitudinal direction at 120° C. of at least 100 MPa. The film has superior heat resistance, mechanical strength, impact resistance, and bending resistance and is particularly suitable for packaging materials.
Abstract:
A first seal member is formed integrally on both surfaces of a first metal plate. The first seal member is integrally formed on a cooling surface of the first metal plate, except a region corresponding to a reaction surface facing an electrode reaction surface, and except regions of inlet buffers and outlet buffers. The first seal member has an expansion. The position of an end surface of the expansion substantially matches the position of a wall surface of the outermost groove of a coolant flow field to prevent the flow of a coolant around the electrode reaction surface.
Abstract:
There is provided an elastomer composition which is prepared by using a very clean filler reduced in both of an amount of moisture generation and an amount of organic outgas generation and is suitable as a molding material for semiconductor production apparatuses and there is provided a molded article. The composition is a crosslinkable composition comprising a high molecular weight polymer, particularly a crosslinkable fluorine-containing elastomer and a filler which has a weight reduction ratio per unit surface area of not more than 2.5×10−5% by weight/m2 when heating at 200° C. for two hours and a total amount of organic gas generated of not more than 2.5 ppm when heating at 200° C. for 15 minutes. The molded article is produced from the crosslinkable composition.
Abstract translation:提供一种弹性体组合物,其通过使用在水分产生量和有机废气产生量中减少的非常干净的填料制备,并且适合作为半导体制造装置的成型材料,并且提供了模制品。 该组合物是包含高分子量聚合物,特别是可交联的含氟弹性体和填料的交联组合物,其每单位表面积的重量减少率不超过2.5×10 -5% 在200℃下加热2小时,并且在200℃下加热15分钟时产生的有机气体总量不超过2.5ppm的总重量/ m 2。 模制品由可交联组合物制备。
Abstract:
There is disclosed a method of fixedly mounting a graded-index rod lens to a holder easily with high reliability without requiring machining of one end face of the rod lens which is difficult to achieve if the lens has a small diameter. The present invention also offers an optical component having the graded-index rod lens inserted and fixed in a through hole formed in the holder. A part of the through hole on the side of one end face of the rod lens is formed as a tapering hole. A transparent member is molded so as to be tightly fitted with the holder such that the whole end face of the lens and at least a part of the inner surface of the tapering hole are covered with the transparent member. A part of the surface of the transparent member is shaped spherically or aspherically to form a molded lens.