485 results about "Longest Diameter" patented technology

A cellulose dispersion which is a dispersion comprising a dispersing medium and a cellulose having a fraction of cellulose I type crystal component of not more than 0.1 and a fraction of cellulose II type crystal component of not more than 0.4 and in which the average particle diameter of the constitutive cellulose is not more than 5 mum. A cellulose particulate and a cellulose composite particulate which have an average particle diameter of 0.2 to 20 mum, a ratio of long diameter (L) to short diameter (D) observed through a scanning electron microscope (L/D) of not more than 1.2 and a coefficient of aggregation of 1.0 to 3.0. The present invention provides a cellulose dispersion which has an excellent effect such as dispersion stability or the like and is high in transparency. Moreover, it provides a cellulose particulate and a cellulose composite particulate which have such performances as no rough feel, excellent rolling properties, high dispersibility and the like.

The invention discloses a dust collecting device of vacuum cleaner, which comprises the following parts: first separating box with long diameter, second separating box with short diameter to separate the foreign body from the first separating box, commutating part to form at the vent side of second separating box to communicate air flow. The invention can reduce noise in the working course, which improves satisfaction of multi-cyclone flow typed dust collecting device for user.

The invention relates to the field of printed circuit board (PCB) manufacture, in particular to a method for manufacturing a PCB slot. The method comprises the following steps of: (1) manufacturing a slot graph on a PCB; (2) drilling a guide hole in two edges of the length direction of the slot graph respectively; and (3) performing superposition drilling based on the guide holes by adopting a drill bit, the diameter of which is equal to the short diameter of the slot, wherein the diameter of the guide holes is less than half of the long diameter of the slot. The method can effectively avoid the quality problems of deformation, large slots, small slots and the like in the short slot processing process, reduces unnecessary rejection of the PCB, reduces the production cost of enterprises and greatly improves the production efficiency.

There is provided a chemical mechanical polishing pad containing a polishing substrate having a polishing surface and a light-transmitting member fused to the polishing substrate. The sectional form of the light-transmitting member when it is cut with a plane parallel to the polishing surface is elliptic with a value obtained by dividing its long diameter by its short diameter of more than 1. The pad is capable of transmitting end-point detection light without reducing its polishing efficiency in polishing a semiconductor wafer.

The invention discloses a machine tool and a method for machining an over-long diameter ratio shaft exceeding the machine tool standard. The method comprises the following steps: firstly, leaving a section of chuck dock with an effective length respectively at two ends of a workpiece in advance, and drilling central holes on two end surfaces of the workpiece; secondly clamping one end of the workpiece on a chuck of a headstock, and supporting the other end by a finial on a tailstock; thirdly, coarsely turning the excircle of each section of the workpiece, and reversing the workpiece for turning when a knife rest feeds to the tail end of a knife rest lead rail; fourthly, finely turning the excircle of each section of the workpiece, and reversing and clamping the workpiece for turning when the knife rest feeds to the tail end of the knife rest lead rail; and finally, milling the chuck docks at the two ends and the chamfer angle on a boring lathe, a milling machine or other machine tools. The machine tool and the method for machining an over-long diameter ratio shaft exceeding the machine tool standard achieve the purpose of machining long-shaft parts over 15 m on a common machine tool for machining long shaft parts, thereby reducing the production cost.

An electrophotographic photosensitive member in which image deletion is hardly produced, and a process cartridge and electrophotographic apparatus having the electrophotographic photosensitive member are provided. For this, a surface of the electrophotographic photosensitive member includes a plurality of depressed portions and a portion other than the depressed portions, each of the depressed portions having a depth of 0.5 to 5 μm and an opening longest diameter of 20 to 80 μm; when a 500 μm×500 μm square region is disposed in an arbitrary position of the surface of the electrophotographic photosensitive member, the area of the depressed portions in the 500 μm×500 μm square region is from 10000 to 90000 μm², and the area of a flat part contained in the portion other than the depressed portions is from 80000 to 240000 μm².

A task of the invention is to provide a semipermeable membrane supporting body which has excellent smoothness on a semipermeable membrane coating surface and can not be permeated by the semipermeable membrane solution. The semipermeable membrane supporting body is characterized in that the semipermeable membrane supporting body is composed of non-woven fabric which comprises more than two main synthetic fiber and adhesive synthetic fiber with different fiber diameters and is provided with the semipermeable membrane coating surface and a semipermeable membrane non-coating surface. In a thickness direction when observed from a cross section SEM of the non-woven fabric, a cross section aspect ratio (long diameter/short diameter of the cross section of the fiber) of the main synthetic fiber in a range between a surface and 1/3 part of the semipermeable membrane coating surface and/or a cross section aspect ratio (long diameter/short diameter of the cross section of the fiber) of the main synthetic fiber in a range between a surface and 1/3 part of the semipermeable membrane non-coating surface are 1.2-3.0.

A structure of installing a wire harness for a sliding door includes a harness protective tube 2 in which electric wires are contained to compose the wire harness. The harness protective tube 2 is curved at the sliding door side and installed at a vehicle body side. The harness protective tube 2 has an oval shape in cross section, and is curved in a direction of its longer diameter portions 3 at the sliding door side so that the longer diameter portions are positioned in a vertical direction, whereby harness slack absorbing function is imparted to the harness protective tube. The longer diameter portions 3 are supported by a support part 11 at the sliding door side, and the harness protective tube 2 is curved in a direction of the longer diameter portions extending from the support part to the vehicle body side. There is provided a protector 5 in which the support part 11 is positioned, and the harness protective tube 2 is contained in a curved state in a direction of the longer diameter portions 3. The longer diameter portions 3 in a curved section 2a of the harness protective tube 2 are urged upward by an elastic member 7.

The invention discloses a flexible heating film assembly and a preparing method thereof. The flexible heating film assembly comprises a flexible heating layer. The flexible heating layer is formed by connecting five to one thousand heating film layers in a stacked mode. Loose and porous structures are formed between every two layers. A circuit system is connected to the flexible heating layer. At least one of the upper side and the lower side of the flexible heating layer is provided with a protecting layer. The multiple heating film layers of the flexible heating layer are connected in a stacked mode, the loose and porous structures are formed between every two layers, and by means of unique nanometer holes, the large long-diameter ratio and the large specific area, the flexible heating layer has large elasticity modulus and high bending strength, macroscopic flexibility and hand feeling comfort of the flexible heating film assembly are ensured; in addition, the flexible heating film assembly has ultra-thin thickness and high flexibility, is easy to process and form and resistant to detergent, and is an excellent insulating and heat preserving material.

An attachment portion between an upper member (11) and a radiator (20) is constructed so as to be displaced in a longitudinal direction of the upper member (11) when an impact force is applied to the upper member (11) by constructing a mount cushion (30) so as to be deformed easily in a longer diameter direction thereof. By this structure, when an impact force is applied to the upper member (11) from a front side of a vehicle, as it is not that the radiator (20) and the upper member (11) are deformed together but that the upper member (11) is deformed prior to the radiator (20), a bending rigidity to an impact force becomes smaller than a conventional case. Consequently, since the upper member is allowed to be deformed easily at the time of collision without largely reducing the mechanical strength of the upper member (11), compatibility between the requirements of protection of pedestrians and sufficient strength of the upper member (11) can be ensured.

A copper alloy material for parts of electronic and electric machinery and tools contains 1.0 to 3.0 mass % of Ni, 0.2 to 0.7 mass % of Si, 0.01 to 0.2 mass % of Mg, 0.05 to 1.5 mass % of Sn, 0.2 to 1.5 mass % of Zn, and less than 0.005 mass % (including 0 mass %) of S, with the balance being Cu and inevitable impurities, wherein the copper alloy material has: (1) a specific crystal grain diameter, and a specific ratio between the longer diameters of a crystal grain on a cross section parallel or perpendicular to a direction of final plastic working; and/or (2) a specific surface roughness after the final plastic working.

Disclosed is a ferritic stainless steel sheet with excellent thermal fatigue properties, including, by mass %, 0.03% or less of C, 1.0% or less of Si, 1.5% or less of Mn, 0.6% or less of Ni, 10˜20% of Cr, 0.05˜0.30% of Ti, 0.51˜0.65% of Nb, 0˜less than 0.10% of Mo, 0.8˜2.0% of Cu, 0˜0.10% of Al, 0.0005˜0.02% of B, 0˜0.20% of V, and 0.03% or less of N, with the balance being Fe and inevitable impurities, having a composition satisfying the following equations (1) and (2) and having a structure in which ε-Cu phase grains each having a long diameter of 0.5 μm or more are present in a density of 10 or less per 25 μm²: Nb−8(C+N)≧0 . . . (1), 10 Si+20 Mo+30 Cu+20(Ti+V)+160 Nb−(Mn+Ni)≧100 . . . (2). The ferritic stainless steel sheet, having a relatively inexpensive component composition, has excellent thermal fatigue properties, and is suitable for use in an automotive exhaust-gas path member, including an exhaust manifold, a catalyst converter, a front pipe, or a center pipe.

Provided is a group of rare-earth regenerator material particles having an average particle size of 0.01 to 3 mm, wherein the proportion of particles having a ratio of a long diameter to a short diameter of 2 or less is 90% or more by number, and the proportion of particles having a depressed portion having a length of 1/10 to ½ of a circumferential length on a particle surface is 30% or more by number. By forming the depressed portion on the surface of the regenerator material particles, it is possible to increase permeability of an operating medium gas and a contact surface area with the operating medium gas.

PCT No. PCT/JP96/03442 Sec. 371 Date Jul. 14, 1997 Sec. 102(e) Date Jul. 14, 1997 PCT Filed Nov. 22, 1996 PCT Pub. No. WO97/18793 PCT Pub. Date May 29, 1997This invention relates to a cosmetic composition having a UV blocking action in a wide region from UVB to UVA and capable of preventing erythema and melanism due to burning by the sun. The conventional fine particles of titanium dioxide are insufficient in the effect for blocking ultraviolet ray and, furthermore, the feeling to the skin becomes poorer, and the finish becomes powdery. This invention resides in the formulation, into a cosmetic composition, of spindle shaped fine particles of titanium dioxide having an average short diameter of 0.03 to 0.06 mu m, an average long diameter of 0.08 to 0.12 mu m, and an aspect ratio (long diameter/short diameter) of 2 to 4 or the spindle shaped fine particles and a metal oxide having an average particle size of 0.2 mu m or more.

Particulate alumina has a mean particle size corresponding to a volume-cumulative 50% mean particle size (D50) falling within a range of 3 to 6 μm, has a ratio of D90 to D10 that is 2.5 or less, contains particles that have a particle size of at least 12 μm in an amount of 0.5 mass % or less, particles that have a particle size of 20 μm or more in an amount of 0.01 mass % or less and particles that have a particle size of 1.5 μm or less in an amount of 0.2 mass % or less, and contains an α-phase as a predominant phase. In addition, the particulate alumina has a ratio of longer diameter (DL) to shorter diameter (DS) that is 2 or less and a ratio of D50 to mean primary particle size (DP) that is 3 or less. With these features, the particulate alumina has a narrow particle size distribution profile, causes little wear and exhibits excellent flow characteristics.

A ferromagnetic material sputtering target made of metal having a composition containing 20 mol % or less of Cr, and Co as the remainder thereof, wherein the structure of the target includes a metallic substrate (A), and, in the metallic substrate (A), a spherical phase (B) containing 90 wt % or more of Co in which the difference between the longest diameter and the shortest diameter is 0 to 50%. Provided is a ferromagnetic material sputtering target capable of improving the leakage magnetic flux to obtain a stable electrical discharge with a magnetron sputtering device.

The invention provides a method for manufacturing an aluminum-clad copper tube with metallurgical bonding, comprising: A, preparing a copper tube and an aluminum tube straight tube, and the aluminum tube straight tube is an aluminum tube extruded by an extrusion machine; B, The inner surface of the straight aluminum tube is treated, and the outer surface of the copper tube is treated; C, the copper tube is penetrated into the straight aluminum tube to obtain an aluminum-clad copper tube blank, and the copper-to-total weight ratio does not exceed 80%; D, The aluminum-clad copper tube billet is processed and annealed for diameter reduction and wall reduction in the subsequent pass, and the total deformation rate is controlled to be above 60%, so as to obtain a finished product of the aluminum-clad copper tube. The manufacturing method of the aluminum-clad copper pipe provided by the present invention adopts an extrusion machine to manufacture straight aluminum pipes without welded pipe welds, and can withstand mechanical processing without cracking. Straight tubes can manufacture large and heavy aluminum-clad copper tubes, and because of the post-pass diameter reduction and wall reduction processing and annealing and control of deformation rate, the copper-aluminum interface metallurgical bonding is stable, the process flow is stable, and it is suitable for mass production.

The invention relates to a method for preparing polyisophthaloyl metaphenylene diamide pulp-shaped fiber belonging to the special synthesis fiber preparation technique field, which is characterized in that the polyisophthaloyl metaphenylene diamide solution is mixed with a precipitant in a shaping equipment which rotates at certain speed, the polyisophthaloyl metaphenylene diamide solution dissolves out the pulp-shaped fiber in the shearing condition through the precipitant directly. The component of the precipitant contains organic solvent which is provided with high-apparent viscosity for adjusting the apparent viscosity of the precipitant, thereby the pulp-shaped fiber of different long diameter ratio is obtained to satisfy different application need of the product. The viscosity ratio of the precipitant and the pulp is enlarged and the force between the pulp and the precipitant is strengthened due to increasing the apparent viscosity of the precipitant, thereby the superior property pulp-shaped fiber can be obtained in the relatively low stirring rotary speed condition of the shaping equipment.

A piston ring having improved scuffing resistance, cracking resistance and fatigue resistance, consists of a high-chromium martensitic stainless steel and a sliding nitriding layer formed on the surface of said steel. The stainless steel consists of C: 0.3 to 1.0%; Cr: 14.0 to 21.0%, N: 0.05 to 0.50%, at least one of Mo, V, W and Nb: 0.03 to 3.0% in total, Si: 0.1 to 1.0%, Mn 0.1 to 1.0%, P: 0.05% or less, S: 0.05% or less, the balance being Fe and unavoidable impurities. The sliding nitriding layer comprises on its surface hard particles mainly consisting of nitrides in a range of from 0.2 to 2.0 mum of average particle size, 7 mum or less of the longest diameter, and from 5 to 30% in area ratio.

There is provided a honeycomb filter including: a honeycomb base material; plugged portions; and a porous collecting layer disposed on the surface of the partition wall parent material in at least the remaining cells. The collecting layer has a constitution in which a plurality of particles combine or intertwine with one another, and the collecting layer includes flat plate-like particles as the plurality of particles. The plurality of particles are particles in which an average long diameter is 0.2 μm or larger and smaller than 10 μm, an average value of ratios (long diameters/short diameters) of the long diameters to the short diameters of the respective particles is smaller than 3, and an average value of ratios (the long diameters/thicknesses) of the long diameters to thicknesses of the respective particles is 3 or larger. An open area ratio of the surface of the collecting layer is 10% or larger.

A hexagonal boron nitride (h-BN) powder is disclosed in which primary particles of the powder exhibit a ratio (D/d) of long diameter (D) to thickness (d) in a range of 5 to 10. Agglomerated particle bodies made of the primary particles have an average particle diameter (D₅₀) in a range of 2 μm to 200 μm, inclusive, and the powder has a bulk density in a range of 0.5 g/cm³ to 1.0 g/cm³. In an exemplary method for producing the h-BN, boron carbide is nitridizated in a nitrogen partial pressure of at least 5 kPa at 1800° C. to 2200° C., inclusive. B₂O₃ (or precursor thereof) is added to the nitridization product to produce a mixture. The mixture is decarbonized in a non-oxidizing atmosphere at a 1500° C. to 2200° C., inclusive. The decarbonization product is pulverized and subject to particle-size classification, yielding H-BN powder. The method includes a depressurizing step, performed at 100 kPa or less either during nitridization or after decarbonization.