Abstract: An object of the present invention is to provide a carbon fiber which exhibits excellent strength development rate when used in a composite material. The present invention that solves the problems is a carbon fiber which simultaneously satisfies the following formulae (1) and (2): Lc/d?3??(1) TS×d×Lc>6.0×105??(2) wherein: Lc is an X-ray crystallite size (?), d is a filament diameter (?m), and TS is a strand tensile strength (MPa).

Abstract: The present invention provides an epoxy resin composition comprising at least the following component [A], component [B] and component [C], the epoxy resin composition being characterized in that: the mixture of component [A] and component [B] is a mixture that, when temperature is increased at 2° C./min, begins to thicken at temperature (T1) and completes thickening at temperature (T2), temperature (T1) being 80-110° C. and temperature (T1) and temperature (T2) satisfying the relationship of expression (1) 5° C.?(T2?T1)?20° C. expression (1); and the mixture of component [A] and component [C] is a mixture that, when temperature is increased at 2° C./min, begins to cure at temperature (T3), temperature (T1) and temperature (T3) satisfying the relationship of expression (2) 5° C.?(T3?T1)?80° C. expression (2). Component [A]: epoxy resin Component [B]: thickening particle Component [C]: curing agent.

Abstract: A printing paper having a base paper, and one or more coating layer(s) arranged on at least one surface of the base paper, wherein; in the coating layer(s), an outermost coating layer positioned on the outermost side with respect to the base paper contains at least a pigment, a binder, a lubricant, a dispersant and a cationic resin, wherein the pigment in the outermost coating layer contains kaolin and calcium carbonate, a content of the kaolin and the calcium carbonate is 80 parts by mass or more based on 100 parts by mass of the pigment in the outermost coating layer, and a mass content ratio of the kaolin to the calcium carbonate in the outermost coating layer is 1:9 to 6:4, and the printing paper satisfies at least one of the following characteristics (I), (II) and (III): (I) when an aqueous solution having a surface tension of 20 mN/m is dropped on the side having the outermost coating layer of the printing paper, a contact angle between the droplet and the outermost coating layer is 40° or more and 6

Abstract: The present invention provides an epoxy resin composition comprising at least the following component [A], component [B] and component [C], the epoxy resin composition being characterized in that: the mixture of component [A] and component [B] is a mixture that, when temperature is increased at 2° C./min, begins to thicken at temperature (T1) and completes thickening at temperature (T2), temperature (T1) being 80-110° C. and temperature (T1) and temperature (T2) satisfying the relationship of expression (1) 5° C.?(T2?T1)?20° C. expression (1); and the mixture of component [A] and component [C] is a mixture that, when temperature is increased at 2° C./min, begins to cure at temperature (T3), temperature (T1) and temperature (T3) satisfying the relationship of expression (2) 5° C.?(T3?T1)?80° C. expression (2).

Abstract: The present invention relates to a coated printing paper for an industrial inkjet printing press having a base paper, and at least two layers of coating layers arranged on at least one surface of the base paper; a first coating layer that is located at a farthest position from the base paper among the at least two layers of coating layers containing a pigment and a binder as main components, a peak existing in the range of 0.010 ?m to 0.030 ?m in a pore size distribution curve thereof, at least one type of the pigment thereof being ground calcium carbonate, and the content thereof being 60 parts by mass or more per 100 parts by mass total of all pigment(s) contained in the first coating layer; and a second coating layer that is in contact with the first coating layer among the at least two layers of coating layers containing a pigment and a binder as main components, and a peak existing in the range of 0.080 ?m to 0.300 ?m in a pore size distribution curve thereof.

Abstract: Provided is a printing coated paper which is advantageous not only in that the coated paper has offset printability and causes no mottling in the printed area even in ink jet printing, but also in that the coated paper exhibits excellent rubbing resistance with respect to the printed area and excellent print density of a dye ink. The task of the present invention is achieved by a printing coated paper having a coating layer comprised mainly of a pigment and a binder formed on at least one side of a base paper, wherein the base paper is a treated base paper which has been subjected to size press using a treatment solution containing at least one member selected from a cationic resin and a water-soluble multivalent cation salt, wherein the total applied amount per each side of the at least one member selected from a cationic resin and a water-soluble multivalent cation salt, in terms of the solids content, is in the range of from 0.1 to 5.

Abstract: The present invention relates to a coated printing paper for an industrial inkjet printing press having a base paper, and at least two layers of coating layers arranged on at least one surface of the base paper; a first coating layer that is located at a farthest position from the base paper among the at least two layers of coating layers containing a pigment and a binder as main components, a peak existing in the range of 0.010 ?m to 0.030 ?m in a pore size distribution curve thereof, at least one type of the pigment thereof being ground calcium carbonate, and the content thereof being 60 parts by mass or more per 100 parts by mass total of all pigment(s) contained in the first coating layer; and a second coating layer that is in contact with the first coating layer among the at least two layers of coating layers containing a pigment and a binder as main components, and a peak existing in the range of 0.080 ?m to 0.300 ?m in a pore size distribution curve thereof.

Abstract: The present invention provides coated printing paper for industrial inkjet printing presses comprising base paper and, formed on at least one surface of the base paper, a coating layer containing a pigment and a binder as major components, wherein the base paper contains precipitated calcium carbonate which is aggregates of spindle-like precipitated calcium carbonate having an average minor-axis length of 0.3 ?m to 0.4 ?m and a ratio of average major-axis length/average minor-axis length of 2.0 to 7.0 and which has an average secondary particle diameter of 3.0 ?m to 5.5 ?m, and further contains at least one material selected from the group consisting of a cationic resin and a water-soluble salt of a polyvalent cation, and the coating layer contains ground calcium carbonate having an average particle diameter of 0.1 ?m to 0.28 ?m in an amount of 60 parts by mass or greater based on 100 parts by mass of the total pigment contained in the coating layer.

Abstract: The present invention provides a heat-curable resin composition, which comprises (1) a heat-curable resin mixture comprising a heat-curable resin (a) and thickener particles (b) and exhibiting a viscosity (150° C.) after having been held at a temperature of 150° C. for 30 seconds that is a viscosity (S), and (2) a curing agent, and is characterized in that the heat-curable resin composition exhibits a lowest viscosity (R) at 80-120° C., the lowest viscosity (R) is 0.1-10 Pa·s, and the viscosity (S) and lowest viscosity (R) satisfy the relationship of formula (1): 5<S/R<200??formula (1).

Abstract: Provided is an active energy ray-curable offset printing ink composition that can prevent occurrence of a slurring phenomenon. The active energy ray-curable offset printing ink composition includes a compound having an ethylenically unsaturated bond, a photopolymerization initiator, a colorant, and an extender pigment. The extender pigment has a median diameter (d50) of 1.0 to 2.0 ?m measured by laser diffractometry. Printing with a reduced slurring phenomenon can be achieved using such an active energy ray-curable offset printing ink composition.

Abstract: The present invention provides coated printing paper for industrial inkjet printing presses comprising base paper and, formed on at least one surface of the base paper, a coating layer containing a pigment and a binder as major components, wherein the base paper contains precipitated calcium carbonate which is aggregates of spindle-like precipitated calcium carbonate having an average minor-axis length of 0.3 ?m to 0.4 ?m and a ratio of average major-axis length/average minor-axis length of 2.0 to 7.0 and which has an average secondary particle diameter of 3.0 ?m to 5.5 ?m, and further contains at least one material selected from the group consisting of a cationic resin and a water-soluble salt of a polyvalent cation, and the coating layer contains ground calcium carbonate having an average particle diameter of 0.1 ?m to 0.28 ?m in an amount of 60 parts by mass or greater based on 100 parts by mass of the total pigment contained in the coating layer.

Abstract: Provided is an active energy ray-curable offset printing ink composition that can prevent occurrence of a slurring phenomenon. The active energy ray-curable offset printing ink composition includes a compound having an ethylenically unsaturated bond, a photopolymerization initiator, a colorant, and an extender pigment. The extender pigment has a median diameter (d50) of 1.0 to 2.0 ?m measured by laser diffractometry. Printing with a reduced slurring phenomenon can be achieved using such an active energy ray-curable offset printing ink composition.

Abstract: A carbon fiber bundle includes carbon fibers and a copolymerized polyolefin attached to the surface of the carbon fibers. The copolymerized polyolefin contains an aromatic vinyl compound and an acid and/or acid anhydride as copolymerization components. The amount of the copolymerized polyolefin attached is 0.01 to 10 parts by mass per 100 parts by mass of the carbon fiber bundle. The carbon fiber bundle may be used or contained in a random mat, a composite material, and various molded articles.

Abstract: The invention provides coated printing paper having base paper and on at least one surface of the base paper, a coating layer containing a pigment and a binder as main components, wherein the base paper contains calcium carbonate, the coating layer contains ground calcium carbonate as a pigment in an amount of 50 parts by mass or more relative to 100 parts by mass of the total of the pigment(s) in the coating layer, the base paper and/or the coating layer contains a calcium compound other than calcium carbonate, and the content of calcium derived from the calcium compound is 3 mmol to 60 mmol, both inclusive, in terms of calcium ions per 1 m2 of the base paper and/or the coating layer.

Abstract: There is provided a manufacturing method for a resin shaped product including casted metal. The method includes laying a composite constituted by inorganic fibers and a thermoplastic resin in a mold for molding, and injecting a metal in a molten state into the mold to integrate the metal with the composite. The manufacturing method of the present invention can provide a resin shaped product including casted metal free of strain and defects in a joining portion.

Abstract: The invention provides lightweight coated paper having good offset printability. The invention provides lightweight coated paper having good printability in commercial printing utilizing the ink jet recording system. The lightweight coated paper of the invention includes base paper, and one or more coating layers disposed on at least one side of the base paper. The coating layer includes a pigment and a binder. The total coating weight of the coating layer(s) is not more than 7.5 g/m2 per side of the base paper. The coating layer contains a polycondensate of an aliphatic monoamine or an aliphatic polyamine and an epihalohydrin compound, and a water-soluble polyvalent cation salt. The content of the water-soluble polyvalent cation salt in the coating layer is 0.3 g/m2 to 1.0 g/m2 per side of the base paper.

Abstract: There is provided a vehicle skeleton member including a composite material of a thermoplastic resin and a carbon fiber, wherein the composite material is a unidirectional carbon-fiber composite material (A) that a form of the carbon fiber in the composite material is a continuous fiber aligned in one direction and/or a random carbon-fiber composite material (B) that a form of the carbon fiber in the composite material is a discontinuous fiber arranged two-dimensionally randomly.

Abstract: The invention provides lightweight coated paper having good offset printability. The invention provides lightweight coated paper having good printability in commercial printing utilizing the ink jet recording system. The lightweight coated paper of the invention includes base paper, and one or more coating layers disposed on at least one side of the base paper. The coating layer includes a pigment and a binder. The total coating weight of the coating layer(s) is not more than 7.5 g/m2 per side of the base paper. The coating layer contains a polycondensate of an aliphatic monoamine or an aliphatic polyamine and an epihalohydrin compound, and a water-soluble polyvalent cation salt. The content of the water-soluble polyvalent cation salt in the coating layer is 0.3 g/m2 to 1.0 g/m2 per side of the base paper.

Abstract: Provided is a printing coated paper which is advantageous not only in that the coated paper has offset printability and causes no mottling in the printed area even in ink jet printing, but also in that the coated paper exhibits excellent rubbing resistance with respect to the printed area and excellent print density of a dye ink. The task of the present invention is achieved by a printing coated paper having a coating layer comprised mainly of a pigment and a binder formed on at least one side of a base paper, wherein the base paper is a treated base paper which has been subjected to size press using a treatment solution containing at least one member selected from a cationic resin and a water-soluble multivalent cation salt, wherein the total applied amount per each side of the at least one member selected from a cationic resin and a water-soluble multivalent cation salt, in terms of the solids content, is in the range of from 0.1 to 5.

Abstract: An ink jet recording material comprises at least two layers of ink-receptive layers mainly containing inorganic fine particles having an average secondary particle size of 500 nm or less on a resin-coated paper having a resin layer on at least one surface of a base paper, and the ink-receptive layer nearer to the support contains a pearlescent pigment.