Abstract: A metal fine particle-containing ink that contains metal fine particles dispersed therein with a polymer dispersant, a low-molecular weight carboxylic acid and an aqueous solvent, wherein the polymer dispersant contains a constitutional unit derived from an acid group-containing monomer; a content of the low-molecular weight carboxylic acid C in the ink is not less than 1% by mass and not more than 15% by mass. A boiling point (C) of the low-molecular weight carboxylic acid and a boiling point (D) of the aqueous solvent satisfy the following relational formula (I); and an acid dissociation exponent pKa (C) of the low-molecular weight carboxylic acid and an acid dissociation exponent pKa (B) of an acid group in the polymer dispersant satisfy the following relational formula (II): boiling point (C)>boiling point (D) ??(I), and pKa (C)<pKa (B) ??(II).

Abstract: A metallic fine particle-containing ink, including metallic fine particles A dispersed with a polymer B, a carboxylic acid C, and an amine D. The polymer B has at least one selected from the group consisting of an organic acid group and an organic base group, the carboxylic acid C has 1 or more and 6 or less carbon atoms, the amine D has 1 or more and 6 or less carbon atoms, and the metallic fine particle-containing ink has a content of the carboxylic acid C of 0.7% by mass or more and 15% by mass or less, and a content of the amine D of 0.7% by mass or more and 20% by mass or less.

Abstract: The present invention relates to a metal fine particle-containing ink containing metal fine particles (a) dispersed therein with a polymer B, in which the ink contains an ink solvent S; a difference ?SP (|SP(S)?SP(B)|) between solubility parameters of the solvent S and the polymer B is not more than 1.5 (cal/cm3)0.5 wherein SP(S) and SP(B) are a solubility parameter of the ink solvent S and a solubility parameter of the polymer B, respectively, as measured by a Fedors method; and the SP(B) is not less than 9.5 (cal/cm3)0.5 and not more than 10.5 (cal/cm3)0.5, as well as a method for producing a printed material, which includes the step of applying the metal fine particle-containing ink to a printing substrate to form a metal coating film of the ink on the printing substrate under ordinary-temperature environments, thereby obtaining the printed material.

Abstract: A metallic fine particle-containing ink, including a metal constituting the metallic fine particles comprising silver, the metallic fine particles contained in the ink having a volume average particle diameter DA of 20 nm or more and 50 nm or less, and the metallic fine particles contained in the ink having a ratio (DA/LA) of the volume average particle diameter DA with respect to a crystallite size LA (nm) obtained from a (111) plane in powder X-ray diffractometry of the metallic fine particles of 1.7 or more and 2.5 or less.

Abstract: A metal fine particle-containing ink that contains metal fine particles dispersed therein with a polymer dispersant, a low-molecular weight carboxylic acid and an aqueous solvent, wherein the polymer dispersant contains a constitutional unit derived from an acid group-containing monomer; a content of the low-molecular weight carboxylic acid C in the ink is not less than 1% by mass and not more than 15% by mass. A boiling point (C) of the low-molecular weight carboxylic acid and a boiling point (D) of the aqueous solvent satisfy the following relational formula (I); and an acid dissociation exponent pKa (C) of the low-molecular weight carboxylic acid and an acid dissociation exponent pKa (B) of an acid group in the polymer dispersant satisfy the following relational formula (II): boiling point (C)>boiling point (D) ??(I), and pKa (C)<pKa (B) ??(II).

Abstract: A BSM unit according to an embodiment is attached to a side surface facing the vehicle body of a visor of an outer mirror provided to a vehicle body of a vehicle. The BSM unit includes a light source; a housing configured to accommodate the light source; and a lens configured to be attached to the housing and emit light from the light source to the outside of the housing, in which at least a portion of the lens protrudes from the side surface of the visor in an out-of-plane direction of the side surface.

Abstract: A lamp unit according to an embodiment is a lamp unit that irradiates with light from a light source, and includes: a circuit board on which the light source is mounted; a housing configured to have an internal space for accommodating the circuit board; a lens configured to be attached to the housing and emit the light from the light source to the outside of the housing, wherein the housing include an insertion hole for inserting the circuit board into the internal space from the outside of the housing to which the lens is attached.

Abstract: The present invention relates to a method for producing an electrically conductive member which includes the step of applying an electrically conductive ink containing a metal fine particle dispersion to a substrate to form electrically conductive images on the substrate under ordinary-temperature environments, thereby obtaining the electrically conductive member, in which the metal fine particle dispersion contains metal fine particles (a) dispersed therein with a polymer B; a glass transition temperature of the polymer B is not higher than a temperature at which the electrically conductive images are formed on the substrate; and the substrate has a porous surface.

Abstract: A BSM unit according to an embodiment is attached to a side surface facing the vehicle body of a visor of an outer mirror provided to a vehicle body of a vehicle. The BSM unit includes: a light source; a housing; and a lens configured to be attached to the housing and emit light from the light source to the outside of the housing. The visor has an edge portion which is positioned on a rear side of the vehicle on the side surface and is surrounding a mirror of the outer mirror, at least a portion of the lens is exposed on the side surface of the visor, and a shape of the exposure portion of the lens includes a center of the exposure portion and the edge portion and is bilateral-symmetrical with respect to a cross section orthogonal to the side surface of the visor.

Abstract: The present invention relates to a metal fine particle-containing ink containing metal fine particles (a) dispersed therein with a polymer B, in which the ink contains an ink solvent S; a difference ?SP (|SP(S)?SP(B)|) between solubility parameters of the solvent S and the polymer B is not more than 1.5 (cal/cm3)0.5 wherein SP(S) and SP(B) are a solubility parameter of the ink solvent S and a solubility parameter of the polymer B, respectively, as measured by a Fedors method; and the SP(B) is not less than 9.5 (cal/cm3)0.5 and not more than 10.5 (cal/cm3)0.5, as well as a method for producing a printed material, which includes the step of applying the metal fine particle-containing ink to a printing substrate to form a metal coating film of the ink on the printing substrate under ordinary-temperature environments, thereby obtaining the printed material.

Abstract: A lamp unit according to an embodiment is a lamp unit that irradiates with light from a light source, and includes: a circuit board on which the light source is mounted; a housing configured to have an internal space for accommodating the circuit board; a lens configured to be attached to the housing and emit the light from the light source to the outside of the housing, wherein the housing include an insertion hole for inserting the circuit board into the internal space from the outside of the housing to which the lens is attached.

Abstract: A BSM unit according to an embodiment is attached to a side surface facing the vehicle body of a visor of an outer mirror provided to a vehicle body of a vehicle. The BSM unit includes: a light source; a housing; and a lens configured to be attached to the housing and emit light from the light source to the outside of the housing. The visor has an edge portion which is positioned on a rear side of the vehicle on the side surface and is surrounding a mirror of the outer mirror, at least a portion of the lens is exposed on the side surface of the visor, and a shape of the exposure portion of the lens includes a center of the exposure portion and the edge portion and is bilateral-symmetrical with respect to a cross section orthogonal to the side surface of the visor.

Abstract: A BSM unit according to an embodiment is attached to a side surface facing the vehicle body of a visor of an outer mirror provided to a vehicle body of a vehicle. The BSM unit includes a light source; a housing configured to accommodate the light source; and a lens configured to be attached to the housing and emit light from the light source to the outside of the housing, in which at least a portion of the lens protrudes from the side surface of the visor in an out-of-plane direction of the side surface.