Abstract: Embodiments relate to a biodegradable resin composition having a high calcium carbonate content, a biodegradable polyester film, and a method for preparing same, and provide: a biodegradable resin composition which, while having a high calcium carbonate content, maintains excellent tensile strength and elongation, has excellent biodegradability and the effect of preventing soil from being acidified, and enables a reduction in production costs; a biodegradable polyester film; a biodegradable polyester sheet; and a method for preparing same.

Abstract: Embodiments of the present invention relate to a multi-layer barrier film, a method for producing same, and a packaging material including same. The multi-layer barrier film has an oxygen permeability of at most 30 cc/m2·atm·day and is composed of at least two different resin layers that are alternately laminated. The two different resin layers include: a first resin layer including an aliphatic polyester-based polymer; and a second resin layer which is resin layer 2a including butenediol vinyl alcohol copolymer (BVOH) or resin layer 2b including ethylene vinyl alcohol (EVOH).

Abstract: An embodiment relates to a multilayered biodegradable barrier film, a manufacturing method therefor, and an eco-friendly packaging material comprising same, and, in the multilayered biodegradable barrier film, two or more types of different resin layers are alternately stacked, the resin layers comprising: a first resin layer including an aliphatic polyester-based polymer; and a second resin layer including polyvinylalcohol (PVA).

Abstract: The present invention provides a multilayered biodegradable film, a method for manufacturing same, and an eco-friendly packaging material comprising same. Specifically, the multilayered biodegradable film comprises two or more kinds of different thermoplastic resin layers, which are alternately laminated and include: a first resin layer containing as a main ingredient a polylactic acid-based polymer; and a second resin layer containing as a main ingredient an aliphatic polyester-based resin or an aliphatic-aromatic copolymer polyester-based resin, the uniformity (LUI) of the first resin layer being adjusted to 0.2 ?m or less. Therefore, the multilayered biodegradable film retains excellent biodegradability and can improve the uniformity, flexibility, transparency, external appearance characteristics, and degrees of noise of final films, and thus can be utilized as a packaging material in various fields to enable the provision of a high-quality, eco-friendly packaging material.

Abstract: A polyester film includes a laminate including a plurality of first layers and a plurality of second layers alternately stacked on the plurality of first layers. Each of the first layers includes lactic acid residues, and each of the second layers includes terephthalate residues and adipic acid residues. The polyester film has an average equivalent noise level of 78 dB or less from a noise level test for film spinning the polyester film 180 degrees at 800 rpm for 30 seconds or more, and has Young's modulus of 280 kgf/mm2 or less.

Abstract: An embodiment relates to a sheet comprising an acrylic resin layer and a fluorinated polymer resin layer directly formed on one surface of the acrylic resin layer; a laminated steel plate comprising the sheet; and a manufacturing method therefor.

Abstract: A sheet according to an embodiment comprises an acrylic resin layer and a fluorinated polymer resin layer, and has an ultraviolet transmittance spectrum with a controlled shape so as to have weather resistance that inhibits discoloration and deformation caused by heat, moisture and UV rays and also have excellent formability. Therefore, the sheet can be applied to construction interior/exterior materials, particularly, to a laminated steel sheet or a decorative sheet for window frames.

Abstract: An embodiment relates to a sheet comprising an acrylic resin layer and a fluorinated polymer resin layer directly formed on one surface of the acrylic resin layer; a laminated steel plate comprising the sheet; and a manufacturing method therefor.