Abstract: Provided are a coating composition for low refractive layer including fluorine-containing compound of the following Chemical Formula 1, an anti-reflection film using the same, and a polarizer and an image display device including the same, wherein the fluorine-containing compound of the following Chemical Formula 1 has a low refractive index of 1.28 to 1.40, thereby making it possible to easily adjust a refractive index of the anti-reflection film and be usefully used as a coating material of the anti-reflection film having an excellent mechanical property such as durability, or the like.

Abstract: Provided is a high-voltage battery system, including a battery pack, a relay part, a relay control part, and a low pass filter part, so that the low pass filter part receives a relay control signal outputted from an output terminal of the relay control part and removes noise therefrom, to thereby remove fundamental causes of fusion of a relay.

Abstract: Provided is a poly(alkylene carbonate) resin composition having superior low-temperature resistance, including: a) a poly(alkylene carbonate) resin prepared by copolymerization of carbon dioxide and at least one epoxide compound selected from the group consisting of (C2-C20)alkyleneoxide substituted or unsubstituted with halogen, (C1-C20)alkyloxy, (C6-C20)aryloxy, or (C6-C20)ar(C1-C20)alkyloxy; (C4-C20)cycloalkyleneoxide substituted or unsubstituted with halogen, (C1-C20)alkyloxy, (C6-C20)aryloxy or (C6-C20)ar(C1-C20)alkyoxy; and (C8-C20)styreneoxide substituted or unsubstituted with halogen, (C1-C20)alkyloxy, (C6-C20)aryloxy, (C6-C20)ar(C1-C20)alkyloxy, or (C1-C20)alkyl; and b) any one or two or more partially aromatic polyesters selected from polyester based on aliphatic and aromatic dicarboxylic acid and an aliphatic dihydroxy compound, and aliphatic polyesters prepared from aliphatic dicarboxylic acid and aliphatic diol.

Abstract: Provided are a microporous polyolefin film usable as a separator for a lithium ion secondary battery and a method for preparing the same, the microporous polyolefin film including one or more layers, wherein the microporous polyolefin has a thickness of 5˜40 ?m, a porosity of 30˜60%, a puncture strength of 0.22 N/?m or higher, and a quality factor of 20 gf/(sec/100 cc) or greater, so that the microporous polyolefin film can have excellent mechanical strength, permeability, and heat shrinkage characteristics, and thus, is suitably used for a separator for a high-capacity and high-output battery.

Abstract: Provided is a circuit for measuring insulation resistance, including: a first operational amplifier that is connected with a positive terminal of a battery and a second operational amplifier; a second operational amplifier that is connected with a negative terminal of the battery and the first operational amplifier; a first switch that is connected between the positive terminal and a non-inverting terminal of the first operational amplifier; and a second switch that is connected between the negative terminal and an inverting terminal of the second operational amplifier, wherein the first operational amplifier and the second operational amplifier are connected with each other through a ground.

Abstract: Provided herein are a method for preparing a resin composition for an expandable polypropylene carbonate and an expandable polypropylene carbonate prepared therefrom. More particularly, the present invention relates to a method for preparing a resin composition for an expandable polypropylene carbonate capable of using supercritical carbon dioxide as a foaming agent and preparing a foam having excellent moldability by an appropriate foaming method, and an expandable polypropylene carbonate prepared therefrom. The expandable polypropylene carbonate capable of having high magnification, excellent thermal stability, and dimensional stability may be prepared by using the resin composition according to the present invention.

Abstract: Provided is a multilayer polyimide flexible metal-clad laminate where multiple layers of polyimide are structured on one surface or two surfaces of a metal foil, the multilayer polyimide flexible metal-clad laminate including: multiple layers of polyimide having different coefficients of linear thermal expansion; and gradient layers each formed between polyimide layers of the multiple layers of polyimide, the gradient layer having a gradual change in coefficient of linear thermal expansion between the polyimide layers, and a manufacturing method thereof, so that there can be provided a flexible metal-clad laminate for a printed circuit board capable of solving a delamination problem between the polyimide layers and having excellent dimensional stability.

Abstract: Provided are an apparatus and a method for estimating internal resistance of a battery pack. The apparatus includes: a voltage sensing unit that measures a voltage value of the battery pack; a current sensing unit that measures a current value of the battery pack; a temperature sensing unit that measures a temperature value of the battery pack; and a microprocessor unit (MCU) that calculates the internal resistance of the battery pack using values transferred from the voltage sensing unit, the current sensing unit, and the temperature sensing unit.

Abstract: Provided is a resin composition for paper-coating comprising aliphatic polycarbonate having an average molecular weight of 30,000 to 300,000 obtained by reaction of one or at least two different kinds of epoxide compounds selected from a group consisting of (C2-C10)alkylene oxide substituted or unsubstituted with carbon dioxide, halogen, or alkoxy; (C4-C20)cycloalkylene oxide substituted or unsubstituted with halogen or alkoxy; and (C8-C20)styrene oxide substituted or unsubstituted with halogen, alkoxy, alkyl or aryl, wherein it contains 0 to 40 weight % of polyolefin-based resin such as polyethylene or polypropylene, based on the total amount of the composition. In addition, the present invention relates to a paper coating method of extrusion-coating the resin composition for paper-coating on paper at 130 to 250° C. to manufacture a coated paper.

Abstract: A lithium secondary battery includes an electrode assembly having at least one tab which projects from one side of the electrode assembly, an external finishing material surrounding and sealing the tab except a distal end portion thereof and the electrode assembly, and polymer films interposed between the external finishing material and the tab to improve adhesion therebetween. When the tab has a thickness no less than a predetermined thickness, the tab is formed to have a sectional shape which ensures that an inside angle defined by one of upper and lower surfaces of the tab and an adjacent side surface of the tab becomes an obtuse angle, and the polymer films are formed to have protuberances on the inner surfaces thereof, so as to improve bondability between the tab and the polymer films.