Abstract: A liquid crystalline polyester powder comprising a liquid crystalline polyester wherein the liquid crystalline polyester has a molar ratio of acyl group terminal/hydroxyl group terminal, as analyzed by 1H-NMR, is 10 or less.

Abstract: A liquid crystalline polyester powder comprising a liquid crystalline polyester having a structural unit derived from an aromatic diol and a structural unit derived from an aromatic dicarboxylic acid, wherein a molar ratio of the structural unit derived from an aromatic diol/the structural unit derived from an aromatic dicarboxylic acid in the liquid crystalline polyester is less than 1.

Abstract: A liquid crystal polyester comprising a repeating unit derived from an aromatic hydroxycarboxylic acid. The content of the repeating unit derived from an aromatic hydroxycarboxylic acid is 80% or more based on 100% of a total number of all repeating units of the liquid crystal polyester. The repeating unit derived from an aromatic hydroxycarboxylic acid comprises a repeating unit (A1) represented by the formula (A1) and a repeating unit (A2) represented by the formula (A2). A ratio [repeating unit (A2)/repeating unit (A1)] is 1.2 or larger. A molar ratio [phenolic hydroxyl groups/(the phenolic hydroxyl groups+acyl groups)] is 0.3 or lower, as calculated by 1H-NMR. —O—Ar11—CO—??(A1) —O—Ar12—CO—??(A1) Ar11 represents a phenylene group and Ar12 represents a naphthylene group. A hydrogen atom is optionally substituted.

Abstract: The present invention provides: a liquid-crystal polyester solution composition which changes little in solution viscosity with the flow initiation temperature of the liquid-crystal polyester powder, and a liquid-crystal polyester powder useful for the liquid-crystal polyester solution composition. This liquid-crystal polyester powder is soluble in aprotic solvents and is characterized in that the proportion of particles having a particle diameter, as determined by dry sieving test according to JIS K 0069 (1992), of less than 250 ?m is 23.5 mass % or less. The present invention further provides a method for producing the liquid-crystal polyester solution composition, the method comprising dissolving the liquid-crystal polyester powder in an aprotic solvent to obtain the liquid-crystal polyester solution composition.

Abstract: The present invention provides: a liquid-crystal polyester solution composition which changes little in solution viscosity with the flow initiation temperature of the liquid-crystal polyester powder, and a liquid-crystal polyester powder useful for the liquid-crystal polyester solution composition. This liquid-crystal polyester powder is soluble in aprotic solvents and is characterized in that the proportion of particles having a particle diameter, as determined by dry sieving test according to JIS K 0069 (1992), of less than 250 ?m is 23.5 mass % or less. The present invention further provides a method for producing the liquid-crystal polyester solution composition, the method comprising dissolving the liquid-crystal polyester powder in an aprotic solvent to obtain the liquid-crystal polyester solution composition.

Abstract: The present invention relates to a liquid crystal polyester powder comprising a liquid crystal polyester, wherein the liquid crystal polyester has a flow starting temperature of 255° C. or less and has a structural unit comprising a naphthalene structure, and, when a particle diameter at which a cumulative volume proportion from a small particle side in a volume-based cumulative particle diameter distribution curve by laser diffraction/scattering type particle diameter distribution measurement is 50% is defined as D50, D50 is 0.1 to 30 ?m.

Abstract: The present invention relates to a liquid crystal polyester powder comprising a liquid crystal polyester, wherein, when a particle diameter at which a cumulative volume proportion from a small particle side in a volume-based cumulative particle diameter distribution curve by laser diffraction/scattering type particle diameter distribution measurement is 90% is defined as D90, D90 is 20 ?m or less.

Abstract: A liquid crystal polyester comprising a repeating unit (A1) represented by the formula (A1) and a repeating unit (A2) represented by the formula (A2). A molar ratio (phenolic hydroxyl groups derived from the repeating unit (A2)/phenolic hydroxyl groups derived from the repeating unit (A1)) is 1 or lower, as calculated by 1H-NMR. A ratio [repeating unit (A2)/repeating unit (A1)] is 1.2 or larger. The number of the repeating unit (A1) is 20% or more and the number of the repeating unit (A2) is 58% or more based on 100% of a total number of all repeating units of the liquid crystal polyester. A flow starting temperature of the liquid crystal polyester is 250° C. or more. —O—Ar11—CO—??(A1) —O—Ar12—CO—??(A2) Ar11 represents a phenylene group and Ar12 represents a naphthylene group. A hydrogen atom is optionally substituted.

Abstract: Provided is a film including a thermoplastic resin, in which a relative permittivity of the film at a frequency of 1 GHz is 3 or less, a dielectric loss tangent of the film at a frequency of 1 GHz is 0.005 or less, and a molecular orientation (MOR) value of the film, which is measured by a microwave orientation meter, is in a range of 1 to 1.1.

Abstract: Provided is a film including a thermoplastic resin, in which a relative permittivity of the film at a frequency of 1 GHz is 3 or less, a dielectric loss tangent of the film at a frequency of 1 GHz is 0.005 or less, and a molecular orientation (MOR) value of the film, which is measured by a microwave orientation meter, is in a range of 1 to 1.1.

Abstract: A liquid composition comprising: a liquid crystal polyester powder comprising a liquid crystal polyester and having an average particle diameter of 30 ?m or less; and a medium, wherein a specific gravity of the medium measured in accordance with JIS Z 8804 using water as a reference substance is 0.90 or more.

Abstract: A liquid crystal polyester comprising a repeating unit (A1) represented by the formula (A1) and a repeating unit (A2) represented by the formula (A2). A molar ratio (phenolic hydroxyl groups derived from the repeating unit (A2)/phenolic hydroxyl groups derived from the repeating unit (A1)) is 1 or lower, as calculated by 1H-NMR. A ratio [repeating unit (A2)/repeating unit (A1)] is 1.2 or larger. The number of the repeating unit (A1) is 20% or more and the number of the repeating unit (A2) is 58% or more based on 100% of a total number of all repeating units of the liquid crystal polyester. A flow starting temperature of the liquid crystal polyester is 250° C. or more. —O—Ar11—CO—??(A1) —O—Ar12—CO—??(A2) Ar11 represents a phenylene group and Ar12 represents a naphthylene group. A hydrogen atom is optionally substituted.

Abstract: A liquid crystal polyester comprising a repeating unit derived from an aromatic hydroxycarboxylic acid. The content of the repeating unit derived from an aromatic hydroxycarboxylic acid is 80% or more based on 100% of a total number of all repeating units of the liquid crystal polyester. The repeating unit derived from an aromatic hydroxycarboxylic acid comprises a repeating unit (A1) represented by the formula (A1) and a repeating unit (A2) represented by the formula (A2). A ratio [repeating unit (A2)/repeating unit (A1)] is 1.2 or larger. A molar ratio [phenolic hydroxyl groups/(the phenolic hydroxyl groups+acyl groups)] is 0.3 or lower, as calculated by 1H-NMR. —O—Ar11—CO—??(A1) —O—Ar12—CO—??(A1) Ar11 represents a phenylene group and Ar12 represents a naphthylene group. A hydrogen atom is optionally substituted.

Abstract: A liquid crystal polyester comprising a structural unit derived from 6-hydroxy-2-naphthoic acid, wherein in thermal extraction GC-MS analysis of the liquid crystal polyester under the following measuring conditions, the relative content of the following impurity component determined from the GC peak area in the total ion chromatogram using methyl 6-hydroxy-2-naphthoate as a standard sample is 50 ppm or less based on the mass of the liquid crystal polyester, and the impurity component has main peaks at m/z=228, 186, 171, and 143 in the MS spectrum chart and a retention time detected in the range of 11.5 to 12.5 min in the total ion chromatogram.

Abstract: Provided is a film including a thermoplastic resin, in which a relative permittivity of the film at a frequency of 1 GHz is 3 or less, a dielectric loss tangent of the film at a frequency of 1 GHz is 0.005 or less, and a molecular orientation (MOR) value of the film, which is measured by a microwave orientation meter, is in a range of 1 to 1.1.

Abstract: Provided is a liquid crystal polyester powder including a liquid crystal polyester having a number average molecular weight of 10000 or less, in which an average particle diameter of the liquid crystal polyester powder is 0.5 to 20 ?m.

Abstract: A liquid crystalline polyester liquid composition containing a liquid crystalline polyester (A) that is soluble in an aprotic solvent, a liquid crystalline polyester (B) that is insoluble in an aprotic solvent, and an aprotic solvent (S), wherein the liquid crystalline polyester (A) and the liquid crystalline polyester (B) are liquid crystalline polyesters that have a structural unit derived from a hydroxycarboxylic acid as a mesogenic group.

Abstract: The present invention relates to a laminate film including a resin layer having a thickness of from 10 ?m to 125 ?m; and a toner layer formed on one surface of the resin layer, in which the resin layer is formed from a resin material having a glass transition temperature of 130° C. or higher, the toner layer has a plurality of voids, and when a value defined by the following formula (S1) using the void area ratio, which represents the ratio of the area of exposed voids, for the respective faces of the surface of the toner layer and a cross section of the toner layer, is designated as porosity, and when two void area ratios respectively corresponding to the cross sections of the toner layer in two orthogonally intersecting directions are used as the void area ratios of the cross sections of the toner layer, the porosities respectively calculated according to the two void area ratios are both from 0.01% to 0.40%.

Abstract: The present invention relates to a laminate film including a resin layer having a thickness of from 10 ?m to 125 ?m; and a toner layer formed on one surface of the resin layer, in which the resin layer is formed from a resin material having a glass transition temperature of 130° C. or higher, the toner layer has a plurality of voids, and when a value defined by the following formula (S1) using the void area ratio, which represents the ratio of the area of exposed voids, for the respective faces of the surface of the toner layer and a cross section of the toner layer, is designated as porosity, and when two void area ratios respectively corresponding to the cross sections of the toner layer in two orthogonally intersecting directions are used as the void area ratios of the cross sections of the toner layer, the porosities respectively calculated according to the two void area ratios are both from 0.01% to 0.40%.

Abstract: The object of the present invention is to provide a laminate superior in dimensional stability, a method for the production thereof, and a circuit substrate using the laminate. There is disclosed a method for producing a laminate, the method including a first step of impregnating a fiber sheet with a liquid composition containing a liquid crystalline polyester and a solvent, and then removing the solvent contained in the fiber sheet to form a resin-impregnated sheet; a second step of stacking a plurality of the resin-impregnated sheets to form an insulative substrate, and then hot press treating the insulative substrate to form a laminated substrate; and a third step of heat treating the laminated substrate at a temperature within the range of from the glass transition temperature of the laminated substrate to the temperature of the glass transition temperature +150° C.