Abstract: The present invention relates to a biodegradable polyester resin, in which the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue and the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue satisfy a ratio of the number of repeat units in a specific range, and the softness index of the resin satisfies a specific range, and to a process for preparing the same. Since the biodegradable polyester resin can provide a biodegradable polyester sheet or film that can be simultaneously enhanced in productivity, processability, and moldability and is excellent in tensile strength, tear strength, and friction coefficient and excellent in biodegradability and water degradability, it can be utilized in more diverse fields.

Abstract: Embodiments relate to a biodegradable and polymerizable polyester composition, to a biodegradable polyester resin prepared therefrom, and to a process for preparing the same. As the biodegradable and polymerizable polyester composition comprises an inorganic filler in a certain content and satisfies a certain range of viscosity, it has excellent dispersibility during polycondensation; thus, it is possible to control the content of metals in a biodegradable polyester resin prepared from the biodegradable polyester polymerization composition and the dispersion index within optimal ranges. In addition, as the biodegradable and polymerizable polyester composition comprising an inorganic filler is subjected to a polycondensation reaction, the dispersibility during the polycondensation reaction is very excellent, which can suppress the aggregation of inorganic filler particles and prevent filter clogging, resulting in a decrease in defects such as voids in the processing process.

Abstract: An eco-friendly biodegradable molded article, which includes a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein a biodegradability per hydrolysis degree of the biodegradable molded article is 1.35 or more, wherein the biodegradability per hydrolysis degree is obtained by dividing a biodegradability after nine weeks by a hydrolysis degree after one week, wherein the biodegradability after nine weeks and the hydrolysis degree after one week are measured by a measurement method below.

Abstract: An eco-friendly biodegradable polyester resin composition includes: a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid; and 5000 ppm to 20000 ppm of a hydrophilic regulator having a molecular weight of 400 to 1300.

Abstract: An eco-friendly biodegradable polyester resin composition includes a polyester resin that includes a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein a biodegradability per aliphatic carboxylic acid is 1.7 or more, the biodegradability per aliphatic carboxylic acid being a value obtained by dividing a biodegradability after 9 weeks by a ratio of the aliphatic dicarboxylic acid to the total dicarboxylic acid, and the biodegradability after 9 weeks being 85% or more.

Abstract: An eco-friendly biodegradable polyester resin composition, including: a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein a soft segment ratio of the polyester resin is 0.21 to 0.29, and wherein the soft segment ratio is a ratio of a diol, bonded between the aliphatic dicarboxylic acid and the aliphatic dicarboxylic acid, among the diols.

Abstract: An embodiment of the present invention relates to a biodegradable laminated film capable of improving all of biodegradability, durability, and barrier properties, and to a method for manufacturing the biodegradable laminated film. The laminated film comprises: a substrate layer formed from a biodegradable resin composition; and a barrier layer positioned on at least one side of the substrate layer and formed from a coating composition, wherein the barrier layer includes nanocellulose, and thus has improved barrier properties, such as oxygen permeability and moisture permeability, without a reduction in mechanical properties such as tensile strength and tear strength. Therefore, the biodegradable laminated film according to the embodiment can exhibit excellent properties when used in various fields in which barrier properties are important, such as packaging materials for refrigerated and frozen foods, packaging materials for electronic materials, and medical fluid bags.

Abstract: The embodiments relate to a biodegradable polyester resin, to a process for preparing the same, and to a biodegradable polyester film comprising the same. As the biodegradable polyester resin has a polydispersity index (PDI) and a weight reduction rate satisfying specific ranges, all of the biodegradability, mechanical properties such as tensile strength and impact strength, and thermal resistance can be enhanced. In addition, when the biodegradable polyester resin is used to prepare a film, it is possible to prevent the incident of defects such as fumes, bubbles, and fisheyes, thereby enhancing processability and productivity. Accordingly, the biodegradable polyester resin according to the embodiment can be applied to various fields that require thermal resistance and moldability, such as medical devices or containers, disposable food containers, and the like, so that they would exhibit excellent characteristics.

Abstract: An eco-friendly biodegradable molded article, which includes a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein a biodegradability per hydrolysis degree of the biodegradable molded article is 1.35 or more, wherein the biodegradability per hydrolysis degree is obtained by dividing a biodegradability after nine weeks by a hydrolysis degree after one week, wherein the biodegradability after nine weeks and the hydrolysis degree after one week are measured by a measurement method below.

Abstract: An eco-friendly biodegradable molded article which includes a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid and has a wet hardness reduction rate of 12% to 25%.

Abstract: Embodiments relate to a biodegradable polyester resin, to a process for preparing the same, and to a biodegradable polyester film comprising the same. The biodegradable polyester resin has peaks at a certain diffraction angle (2?) in an X-ray diffraction spectrum (XRD), while it satisfies a crystal size in a specific range, whereby it has excellent crystallinity and thermal stability, and it is enhanced in all of the mechanical properties, dimensional stability, and moldability. Accordingly, the biodegradable polyester resin according to the embodiment can be applied to various fields that require thermal resistance, mechanical properties, dimensional stability, and moldability, such as packaging materials such as disposable bags and food containers, and automobile interior parts, so that they would exhibit excellent characteristics.

Abstract: An eco-friendly biodegradable molded article, including: a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein, when continuously irradiated with ultraviolet rays from a UVA 340 ultraviolet light lamp at an intensity of 0.75 W/m2, a tensile strength decrease rate from the beginning of the ultraviolet irradiation to 1 day ranges from 5% to 40%.

Abstract: An eco-friendly biodegradable polyester resin composition includes: a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid; and 5000 ppm to 20000 ppm of a hydrophilic regulator having a molecular weight of 400 to 1300.

Abstract: Disclosed is an eco-friendly biodegradable polyester resin composition, including: a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein an alternating ratio of the polyester resin is 0.3 to 0.7, wherein the alternating ratio is a ratio of a diol, bonded between the aromatic dicarboxylic acid and the aliphatic dicarboxylic acid, among the diol.

Abstract: An eco-friendly biodegradable polyester resin composition includes a polyester resin that includes a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein the first weight swelling rate of the biodegradable polyester resin composition is 4% to 20%.

Abstract: The present invention relates to a biodegradable polyester resin, in which the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue and the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue satisfy a ratio of the number of repeat units in a specific range, and the softness index of the resin satisfies a specific range, and to a process for preparing the same. Since the biodegradable polyester resin can provide a biodegradable polyester sheet or film that can be simultaneously enhanced in productivity, processability, and moldability and is excellent in tensile strength, tear strength, and friction coefficient and excellent in biodegradability and water degradability, it can be utilized in more diverse fields.

Abstract: The present invention relates to a biodegradable polyester resin, in which the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue and the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue satisfy a ratio of the number of repeat units in a specific range, and the softness index of the resin satisfies a specific range, and to a process for preparing the same. Since the biodegradable polyester resin can provide a biodegradable polyester sheet or film that can be simultaneously enhanced in productivity, processability, and moldability and is excellent in tensile strength, tear strength, and friction coefficient and excellent in biodegradability and water degradability, it can be utilized in more diverse fields.

Abstract: The present invention relates to biodegradable polyester resin, wherein the ratio (X/Y) of the number (X) of the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue to the number (Y) of the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue is 0.8 to 3.0, and the impact strength index is 2.2 or more, and to a process for preparing the same. The biodegradable polyester resin can further enhance the impact absorption energy and hardness as compared with conventional biodegradable resins. Further, it can provide a biodegradable polyester film or molded article that is excellent in impact resistance, durability, and formability, along with biodegradability. Thus, it can be utilized in more diverse fields.

Abstract: The present invention relates to a biodegradable polyester resin, in which the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue and the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue satisfy a ratio of the number of repeat units in a specific range, and the softness index of the resin satisfies a specific range, and to a process for preparing the same. Since the biodegradable polyester resin can provide a biodegradable polyester sheet or film that can be simultaneously enhanced in productivity, processability, and moldability and is excellent in tensile strength, tear strength, and friction coefficient and excellent in biodegradability and water degradability, it can be utilized in more diverse fields.

Abstract: The embodiments relate to a biodegradable polyester resin composition, to a nonwoven fabric, to a film, and to processes for preparing the same in which the biodegradable polyester resin composition comprises a specific diol component and a specific dicarboxylic acid component and may further comprise nanocellulose, whereby the biodegradability, flexibility, strength, and processability are enhanced. Since the biodegradable polyester resin composition has enhanced biodegradability, flexibility, strength, and processability as compared with the conventional natural biodegradable polymer widely used, it can be applied to various fields such as films, packaging materials, and nonwoven fabrics to show excellent characteristics.