摘要:
The invention thus provides a core-shell polymer comprising a core phase which is rubbery polymer and a shell phase which is a glassy polymer with an unsaturated dicarboxylic acid or its mono-alkyl ester as a constituent thereof, wherein the toluene-soluble fraction of the core-shell polymer accounts for not more than 10% by weight.It also provides polyamide resin compositions comprising said core-shell polymer and molded articles produced by molding said compositions.The resin compositions and molded articles which comprises the core-shell polymer as an impact modifier have good features, especially a high impact strength at temperature ranging from room temperature to -30.degree. C.
摘要:
A polymer for a prolonged release preparation which comprises(A) a polylactic acid and(B) a copolymer of glycolic acid and a hydroxycarboxylic acid of general formula ##STR1## wherein R stands for an alkyl group having 2 to 8 carbons, wherein the weight ratio of (A) and (B) is in the range of 10/90 to 90/10. The drug is released at a constant rate from the preparation over the total release period without a large burst at the initial state. Furthermore, the drug release period of the preparation can be freely controlled by varying the blending ratio of (A) and (B).
摘要:
For formation of a photographic image by development of a silver halide photographic material with an automatic developing machine, a certain period of time or not longer than 15 seconds is set as the time of the development step and a silver halide photographic material is used which, when developed for a period of one-half of said certain period of time after such an exposure that the exposed silver halide photographic material, when developed for said certain period of time, would give a value of (Dmax-fog).times.1/2, gives a value of (D-fog) having 70% or more of the value of (Dmax-fog).times.1/2. The silver halide photographic material comprises at least one of a combination of (1), (2) and (3) or (2) and (4): where: (1) represents a silver halide emulsion containing a water-soluble iridium salt; (2) represents a silver halide emulsion layer with a silver amount from 1 to 3.5 grams/m.sup.2 coated on one surface of said emulsion layer; (3) represents silver halide grains wherein the mean grain size is 1.0 .mu. or less; and (4) represents tabular silver halide grains having an aspect ratio of 4 or more. By the rapid development procedure, a sharp image with no development unevenness (drag streaks) can be obtained and the automatic developing machine to be used may be made small-sized and compact.
摘要:
A polymer particle is provided comprising a rubbery polymer and a methacrylic glassy polymer as formed in latex interpenetrating polymer networks structure, which is prepared by swelling a rubbery polymer with a swelling solvent and carrying out an emulsion polymerization reaction of methacrylic monomers in the presence of said swollen rubbery polymer. Also provided are a resin composition comprising the polymer particles, such as poly (alkylene terephthate) resin melt-blended with the polymer particles, and a molded article of the resin composition. The molded article has a high impact-strength.
摘要:
A device for changing the stroke of a caulking machine having a table on which is placed an article having a plurality of rivet shanks, and a rivet head forming tool. The table is adapted to be moved back and forth and right and left to bring the rivet shanks into the position right under the rivet head forming tool one after another. The rivet head forming tool is driven by a motor and moved up and down by a cylinder to form a rivet head at the top of each rivet shank. The device for changing stroke has a plate member movable up and down together with the rivet head forming tool and stopper pins having their top ends secured to the plate member. An annular plate is mounted outside a rotary shaft of the rivet head forming tool so as to be freely rotatable at a predetermined position. A plurality of pins having lengths corresponding to the lengths of the rivet shanks of the article are secured at equal intervals to the annular plate to extend upright. The pins are adapted to be brought into abutment at the top ends thereof with the bottom ends of the stopper pins to restrict the down stroke of the rivet head forming tool.
摘要:
A welding wire packaging container of mono-cylinder pail type accommodating a welding wire winding which includes of a multitude of layers of looped wire portions having diameters smaller than the inside diameter of the container and centrally having a cavity of substantially cylindrical form. The container includes a retaining member placed on overlying layers of wire loops and adapted to be lowered by gravity as the wire is withdrawn from the container, the retaining member being centrally formed with a circular wire guide hole to permit wire withdrawal therethrough, and resilient members mounted at least two spaced positions around the outer periphery of the retaining member for contact with the inner wall surface of the container, the guide hole in the retaining member being located in vertically spaced relation with an upper lid of the container.
摘要:
In a process for development, fixing, and washing or stabilization of a silver halide photographic light-sensitive material by means of an automatic developing machine, is provided, which process comprises supplying to a developing bath and/or a fixing bath a concentrated developing solution and/or a concentrated solution having a fixing capacity, respectively, and water which has been treated by at least one antifungal means selected from the group consisting of irradiation with ultraviolet rays, irradiation with magnetic fields, processing with ion exchange resins, and incorporation of at least one compound selected from the group consisting of aminopolycarboxylic acids and phosphonic acids. In a preferred embodiment, the amount of wash water or stabilizing sollution to be refilled is 3 l or less (including 0 l) per 1 m.sup.2 of light-sensitive material, and the water processed by antifungal means contained in the stock tank is also used as the wash water or stabilizing solution.
摘要:
An automatic image developing apparatus for a halide silver photographic photosensitive material includes a developing tank, a fixing tank, and a washing tank for successively delivering therethrough the halide silver photographic photosensitive material which has been exposed or has recorded an image thereon. The washing tank is supplied with washing water at a rate of 2 liters or less per 1 m.sup.2 of the photographic photosensitive material. The apparatus also has a plurality of roller pairs for squeezing water from the photographic photosensitive material fed from the washing water toward a drying unit, and a roller washing unit associated with at least a first one of the roller pairs which is closest to the washing tank to grip the photographic photosensitive material from the washing tank, for washing said at least one roller pair at all times.
摘要:
A welding wire for use in submerged arc welding of Cr-Mo steels comprising less than 0.25% C, less than 0.60% Si, 0.15-1.50% Mn, 0.50-10.0% Cr and 0.40-2.50% Mo on the basis of the weight ratio comprises 0.05-0.19% C, less than 0.60% Si, less than 1.6% Mn, 0.50-10.5% Cr and 0.30-2.50% Mo as the basic elements boron and nitrogen added thereto as the essential elements each in the range of 0.0001-0.25% B and 0.010-0.040% N; and at least one of titanium, zirconium and aluminum further incorporated therein each in the range of 0.01-0.30% Ti, 0.05-0.30% Zr and less than 0.40% Al, while being adjusting such that the sum of the elements: Ti+Al+Zr+10B lies within a range between 0.003-0.40% on the basis of the weight ratio. The welding wire of the novel composition can provide weld alloy steels with high strength and excellent toughness even at low temperature.
摘要:
The invention describes a taking lens driving system using permanent magnets provided inside of the lens barrel. A plurality of movable coils surrond the circumference of the taking lens and are arranged so as to transverse the magnetic flux of the permanent magnets.At least one of the movable coil members drives the taking lens unit, while the other coils are used to the range of movement of the movable coil member.