Abstract: A barium titanate fiber is useful as a filler for a polymer composite piezoelectric body, a polymer composite piezoelectric body has high piezoelectric properties, and a piezoelectric element utilizes the polymer composite piezoelectric body. In the barium titanate fiber, the molar ratio of barium atoms to titanium atoms (Ba/Ti ratio) falls within the range of 1.01 to 1.04. The polymer composite piezoelectric body includes a resin composition containing the barium titanate fiber and a polymer. The piezoelectric element including an electrically conductive layer on one surface or both surfaces of the polymer composite piezoelectric body.

Abstract: Provided are: a filter medium with high dust collection efficiency, low pressure loss, and a long lifespan; and a filter material used for the filter medium. This composite structure includes ultrafine fibers having a fiber diameter of less than 500 nm, and beads. The outermost surface of the composite structure has at least 500/mm2 of beads with a diameter of 5 ?m or more. The ultrafine fibers and the beads preferably have the same component.

Abstract: A filtration medium for a filter, having high dust collection efficiency, low pressure loss, a long service life and sufficient processing strength into a filter. A combined fiber nonwoven fabric includes first fibers having a mean fiber diameter of less than 200 nanometers, and second fibers having a mean fiber diameter in the range of 200 to 5000 nanometers, in which basis weight of the combined fiber nonwoven fabric is in the range of 2.1 to 15.0 g/m2.

Abstract: A spinneret (1) for electrostatic spinning is configured from a structure of an electrically conductive metal material. The structure is provided with a long-axis direction (X), a short-axis direction (Z), and a thickness direction (Y). An inflow port (10) for a spinning starting material fluid is provided to one surface of the structure. A plurality of protrusions (5) are formed on another surface of the structure so as to be aligned along the long-axis direction (X). Each of the plurality of protrusion (5) extends so as to protrude from the structure. The protrusions (5) have, provided to apexes (2) thereof, discharge holes (4) for discharging the starting material fluid. The pitch of the discharge holes (4) exceeds 1 mm.

Abstract: Provided is a method for producing metal titanate fibers which is capable of easily preparing a uniform spinning solution and capable of stably spinning for a long period. The method for producing metal titanate fibers includes (A) a process for preparing a spinning solution, (B) a process for manufacturing precursor fibers by electro-spinning the spinning solution, and (C) a process for calcinating the precursor fibers, wherein (A) the process for preparing the spinning solution comprises: (a1) a process for obtaining a first solution by mixing a metal salt and a first solvent; (a2) a process for obtaining a second solution by mixing a fiber-forming material, a second solvent and a titanium alkoxide; and (a3) a process for obtaining a spinning solution by mixing the first solution and the second solution.

Abstract: An object of the invention is to provide a filter medium having high collection efficiency of dust and low pressure drop. The invention relates to a filter medium including ultrafine fibers subjected to electrospinning, in which the ultrafine fibers have a plurality of ester bonds in a molecule. A mean fiber diameter of the ultrafine fibers is preferably in the range of 10 to 5,000 nanometers, and the ultrafine fibers are preferably ultrafine fibers composed of polylactic acid, polyethylene terephthalate, polymethyl methacrylate or polycarbonate. Moreover, another object is to provide a production method for a fibrous structure for a filter medium, including a step of preparing a spinning solution in which a resin having a plurality of ester bonds in a molecule is dispersed or dissolved in a solvent, and a step of obtaining the fibrous structure including ultrafine fibers by performing electrospinning of the spinning solution.

Abstract: To provide a method for producing a porous calcium phosphate body having open micro-pores, by the method for producing the porous calcium phosphate body, in which calcium phosphate is subjected to electro-spinning.

Abstract: An object of the invention is to provide conjugate fibers with an encapsulated liquid crystal, which can be used for forming a flexible liquid crystal display device, and the conjugate fibers without disturbance of arrangement of liquid crystal molecules within the fibers. The conjugate fibers according to the invention are sheath-core conjugate fibers having a liquid crystal composition as a core component, and the conjugate fibers with the encapsulated liquid crystal, in which the liquid crystal composition contains a halogen-containing liquid crystal compound.

Abstract: A spinneret (1) for electrostatic spinning is configured from a structure of an electrically conductive metal material. The structure is provided with a long-axis direction (X), a short-axis direction (Z), and a thickness direction (Y). An inflow port (10) for a spinning starting material fluid is provided to one surface of the structure. A plurality of protrusions (5) are formed on another surface of the structure so as to be aligned along the long-axis direction (X). Each of the plurality of protrusion (5) extends so as to protrude from the structure. The protrusions (5) have, provided to apexes (2) thereof, discharge holes (4) for discharging the starting material fluid. The pitch of the discharge holes (4) exceeds 1 mm.

Abstract: To provide a fibrous laminate having excellent secondary processability in processing into a filter or the like by laminating a fibrous layer composed of ultrafine fibers with another fibrous layer and strongly adhering and uniting each interlayer while reduction of characteristics of the ultrafine fibers is suppressed at a minimum to compensate insufficiency of mechanical strength and rigidity of a layer of ultrafine fibers. The fibrous laminate includes fibrous layer I composed of ultrafine fibers having a mean fiber diameter of 10 to 1,000 nm and fibrous layer II composed of thermo-fusible conjugate fibers having a mean fiber diameter of 5 to 100 ?m, in which contact points between the ultrafine fibers and the thermo-fusible conjugate fibers are bonded by melting of the thermo-fusible conjugate fibers composing the fibrous layer II, and the fibrous layer I and the fibrous layer II are laminated and united by the formed bonding points.

Abstract: To provide a method for producing a porous calcium phosphate body having open micropores. A porous calcium phosphate body having open and uniform micropores can be produced by the method for producing the porous calcium phosphate body, in which calcium phosphate is subjected to electrospinning.

Abstract: An object is to provide a method for producing an ever-larger molecular weight collagen-like polypeptide single strand. Another object is to provide a method for controlling a molecular weight of a product to be obtained in desired magnitude upon producing a collagen-like polypeptide single strand. A solution is a method for producing a polypeptide including a step for allowing a condensation reaction of peptide oligomers represented by any one of formulas (1) to (3) (SEQ ID No:1 to SEQ ID No:3), wherein the condensation reaction is carried out in an aqueous solvent containing a phosphate ion in the range of 0 M to less than 0.01 M in the presence of a condensing agent, or a condensing agent and a condensing auxiliary: H-(Pro-Y-Gly)n-OH??(1); H-(Y-Gly-Pro)n-OH??(2); and H-(Gly-Pro-Y)n-OH??(3); wherein, in formulas (1) to (3), Y is hydroxyproline or proline, and n is an integer from 1 to 10.

Abstract: An object is to provide a method for producing an ever-larger molecular weight collagen-like polypeptide single strand. Another object is to provide a method for controlling a molecular weight of a product to be obtained in desired magnitude upon producing a collagen-like polypeptide single strand. A solution is a method for producing a polypeptide including a step for allowing a condensation reaction of peptide oligomers represented by any one of formulas (1) to (3) (SEQ ID No:1 to SEQ ID No:3), wherein the condensation reaction is carried out in an aqueous solvent containing a phosphate ion in the range of 0 M to less than 0.01 M in the presence of a condensing agent, or a condensing agent and a condensing auxiliary: H-(Pro-Y-Gly)n-OH??(1); H-(Y-Gly-Pro)n-OH??(2); and H-(Gly-Pro-Y)n-OH??(3); wherein, in formulas (1) to (3), Y is hydroxyproline or proline, and n is an integer from 1 to 10.