41results about How to "Poor workability" patented technology

A close-contact multi-layer type diffractive optical element having a homogeneous low-refractive-index and high-dispersion resin layer is produced with satisfactory workability. Among two optical members constituting a diffractive plane, a low-refractive-index and high-dispersion member is formed, using a resin precursor composition containing bifunctional fluorine-containing (meth)acrylate and bifunctional (meth)acrylate having a fluorene structure.

The present invention provides a β type titanium alloy characterized by consisting of, by mass %, V: 15 to 25%, Al: 2.5 to 5%, Sn: 0.5 to 4%, O (Oxygen): not more than 0.20%, H: not more than 0.03%, Fe: not more than 0.40%, C: not more than 0.05% and N: not more than 0.02%, and the balance Ti and impurities. The present invention also provides a method of manufacturing a β type titanium alloy characterized by comprising the following steps (a) to (c): (a) Preparing a β type titanium alloy consisting of, by mass %, V: 15 to 25%, Al: 2.5 to 5%, Sn: 0.5 to 4%, O (Oxygen): not more than 0.20%, H: not more than 0.03%, Fe: not more than 0.40%, C: not more than 0.05% and N: not more than 0.02%, and the balance Ti and impurities. (b) Pickling the B type titanium alloy in an aqueous solution including 3 to 40 mass % of HF, and

(c) Further pickling the B type titanium alloy in an aqueous solution including 3 to 6 mass % of HF and 5 to 20 mass % of HNO₃.

The color image forming apparatus comprises a transfer belt device which feeds a transfer member such as a paper and a plurality of image forming units. The image forming units are disposed facing towards the transfer belt device. The transfer belt device, at least in a portion in which the image forming units have been disposed, is arranged such that it is inclined with respect to the ground. Each of the image forming unit forms a desired image and sequentially transfers the formed image on the transfer member fed by the transfer belt device.

A method of preventing fouling structure including: preparing an antifouling pressure-sensitive adhesive tape including a base material layer (A) and a pressure-sensitive adhesive layer (A), and an easily adhering pressure-sensitive adhesive tape including a base material layer (B) easily adhering to the pressure-sensitive adhesive layer (A) and a pressure-sensitive adhesive layer (B); bonding the easily adhering pressure-sensitive adhesive tape to a surface of a structure, and bonding the antifouling pressure-sensitive adhesive tape onto the bonded easily adhering pressure-sensitive adhesive tape so that lengthwise directions of the tapes are non-parallel with each other, or bonding the two or more antifouling pressure-sensitive adhesive tapes and the at least one easily adhering pressure-sensitive adhesive tape onto a surface of a structure so that the antifouling pressure-sensitive adhesive tapes are prevented from overlapping each other and a junction between the antifouling pressure-sensitive adhesive tapes is on a surface of the base material layer (B).

In the electroconductive contact unit of the present invention, an electroconductive needle member 2 is made of a noble metal alloy having a high hardness and wear resistance, and formed with a gold plated layer 8 via a Ni under layer 7, and a flat surface 2e is formed by a tip portion thereof so as to expose the material of the needle member. Thereby, the durability of the needle member is ensured and the electroconductivity of the electric path between the needle member and coil spring is minimized on account of the gold plated layer. Even when the contact surface is soiled by solder deposition after repeated applications to contact objects such as solder balls, simply grinding the contact surface and revealing a new surface, the contact resistance between the contact surface and contact object can be kept unchanged by grinding so that the test can be conducted with the benefit of low resistance at all times.

Provided is a medicine cart (1) including a cassette (10) which is upwardly open and accommodates a plurality of medicine containers in an upright state in a row; a shelf plate (8) on which a plurality of the cassettes (10) are placed and which can be drawn out of a main body (3) of the medicine cart (1); and a pressing member (47) provided in each cassette (10) and adapted to forwardly press a rearmost medicine container, in which a locking means (61) for locking the pressing member (47) at a predetermined position in the cassette (10), and an unlocking means (62,63) for canceling the lock of the pressing member (47) by the locking means (61) if the shelf plate (8) is pushed in or drawn out, are provided.

An optical fiber manufacturing apparatus for manufacturing an optical fiber by drawing a optical fiber preform, including: a drawing furnace having therein a muffle tube into which the optical fiber preform is inserted and heating the optical fiber preform; and a first seal member which is disposed at an insert side of the drawing furnace so as to be coaxial with the drawing furnace and which seals the optical fiber preform inserted into an opening formed at the center thereof, wherein the first seal member includes a plurality of inner-circumference slits formed in the inner circumference thereof and a plurality of outer-circumference slits formed in the outer circumference thereof.

The invention discloses a viscosity-reducing type polycarboxylic acid water reducing agent preparation method, which comprises: (1) preparing an esterification monomer; (2) carrying out a copolymerization reaction; and (3) carrying out a neutralization reaction. According to the present invention, the viscosity-reducing type polycarboxylic acid water reducing agent is prepared by co-polymerizing 2-allyloxyethanol, a blend, VPEG, 2-methacryloyloxyethyl phosphorylcholine and an unsaturated acid, such that the phosphate radical, the carboxylate radical, the quaternary ammonium salt and the estergroup are introduced into the molecular structure of the polymer while the polymer structure is lightly cross-linked, wherein the product obtained by the esterification of the single carboxy in 2-phosphonobutane-1,2,4-tricarboxylicacid prepared by a 2-phosphonobutane-1,2,4-tricarboxylicacid esterification reaction, the product obtained by the esterification of the two carboxy in a small amount of2-phosphonobutane-1,2,4-tricarboxylicacid and the product obtained by the esterification of the three carboxy in a small amount of 2-phosphonobutane-1,2,4-tricarboxylicacid form the blend; and the prepared viscosity-reducing type polycarboxylic acid water reducing agent has advantages of viscosity reducing, water reducing, slump retaining and mud resistance, and can solve the problems of high viscosity, poor workability and rapid loss due to the high mud content in the current concrete raw materials.

Disclosed are a method of preparing a superabsorbent polymer, including adding a superabsorbent polymer with a water dispersion solution containing particles having i) a BET specific surface area of 300 to 1500 m²/g and ii) a porosity of 50% or more, and a superabsorbent polymer prepared by the method.