Abstract: Provided are a wholly aromatic polyester amide copolymer resin, a polymer film containing the wholly aromatic polyester amide copolymer resin, a flexible metal clad laminate containing the polymer film, and a flexible printed circuit board employing the flexible metal clad laminate. The disclosed wholly aromatic polyester amide copolymer resin includes 5-25 parts by mole of a repeating unit (A) derived from an aromatic hydroxy carboxylic acid; 20-40 parts by mole of at least one repeating unit selected from the group consisting of a repeating unit (B) derived from an aromatic amine having a phenolic hydroxyl group and a repeating unit (B?) derived from an aromatic diamine; 20-40 parts by mole of a repeating unit (C) derived from an aromatic dicarboxylic acid; 5-20 parts by mole of a repeating unit (D) derived from an aromatic diol; and 5-20 parts by mole of a repeating unit (E) derived from an aromatic amino carboxylic acid.

Abstract: Provided is a wholly aromatic liquid crystalline polyester resin compound. The wholly aromatic liquid crystalline polyester resin compound includes a wholly aromatic liquid crystalline polyester resin having a high melting point and mica having a predetermined size.

Abstract: Disclosed are a fiberweb, a preparation method thereof, and a filter including the fiberweb. The fiberweb includes a wholly aromatic liquid crystal polyester resin which includes a repeating unit induced from a hydroxybenzoic acid and a repeating unit induced from a hydroxynaphthoic acid, but does not include a repeating unit induced from an aromatic dicarboxylic acid.

Abstract: A thermally conductive polymer composite material and an article including the same. The thermally conductive polymer composite material includes 15 to 20 parts by weight of a wholly aromatic liquid crystalline polyester resin; and 80 to 85 parts by weight of a thermally conductive additive.

Abstract: Methods of preparing an aromatic liquid crystalline polyester resin and an aromatic liquid crystalline polyester resin compound are disclosed. A method of preparing an aromatic liquid crystalline polyester resin may include: acetylating a first monomer including an amino group by a reaction with a carboxylic acid anhydride; acetylating a second monomer including a hydroxyl group and not including an amino acid group with an additional carboxylic acid anhydride; and synthesizing an aromatic liquid crystalline polyester prepolymer by a condensation polymerization reaction of the acetylated first and second monomers with dicarboxylic acid. A method of preparing an aromatic liquid crystalline polyester resin compound may use the aromatic liquid crystalline polyester resin prepared according to the forgoing method.

Abstract: A reflector and a light-emitting device including the same. The reflector includes a wholly aromatic liquid crystalline polyester resin compound that includes a repeating unit derived from a hydroxybenzoic acid and a repeating unit derived from a hydroxynaphthoic acid, but does not include a repeating unit derived from an aromatic dicarboxylic acid, wherein the wholly aromatic liquid crystalline polyester resin compound further includes a white inorganic filler.