Abstract: The embodiments relate to a polyester film, which comprises a copolymerized polyester resin comprising a diol component and a dicarboxylic acid component and has a heat shrinkage rate of 30% or more in the main shrinkage direction upon thermal treatment at a temperature of 80° C. for 10 seconds and a melting point of 170° C. or higher as measured by differential scanning calorimetry, which not only solve the environmental problems by improving the recyclability of the polyester container, but also are capable of enhancing the yield and productivity, and a process for regenerating a polyester container using the same.

Abstract: The embodiments relate to a polyester film, to a process for preparing the same, and to a process for regenerating a polyethylene terephthalate (PET) container using the same. The polyester film has excellent seaming characteristics and recyclability by virtue of controlled crystallinity, whereby clumping rarely occurs even if it is thermally treated for a long period of time in the regeneration process.

Abstract: Embodiments relate to a polyester-based film and a process for regenerating a polyester-based container using the same, which not only solve the environmental problems by enhancing the recyclability of polyester-based containers but also are capable of enhancing the quality, yield, and productivity. When the polyester-based film is cut into a size of 1 cm in width and 1 cm in length, immersed in an aqueous solution of sodium hydroxide (NaOH) having a concentration of 1% by weight, and stirred for 15 minutes at 85° C. at a speed of 240 m/minute, the average particle size of the component of the printing layer separated from the base layer satisfies 15 ?m or more. Thus, it is possible to enhance the quality of the regenerated polyester-based chips produced from the polyester-based container provided with the polyester-based film.

Abstract: A passive air sampler is designed to allow for multiple sorbents and multiple sampling rates. The passive air sampler is also reusable and has interchangeable sorbents.

Abstract: Embodiments relate to a process for regenerating a polyester container and a polyester film to be used therein, which not only solve the environmental problems by improving the recyclability of polyester containers, but also are capable of enhancing the quality, yield, and productivity. The process for regenerating a polyester container comprises providing the polyester container and a heat-shrunken polyester film that wraps at least part of the polyester container; crushing the polyester container and the heat-shrunken film to obtain flakes; and thermally treating the flakes to produce regenerated polyester chips, wherein when the flakes are thermally treated at a temperature of 200° C. to 220° C.

Abstract: Disclosed herein is a variable soil sampling device which may be customized with respect to sampling rate and sorbent material used. Multiple variable sampling devices may be attached to each other to simultaneously sample different components or contaminants in the same time period.

Abstract: Embodiments relate to a process for regenerating a polyester container and regenerated polyester chips prepared therefrom. The process comprises preparing a polyester container provided with a heat shrinkable film; crushing the container provided with the heat shrinkable film to obtain flakes; and thermally treating the flakes to produce regenerated polyester chips, wherein when the flakes are thermally treated at a temperature of 200° C. to 220° C. for 60 minutes to 120 minutes, the clumping fraction is 5% or less, and the flakes comprise first flakes obtained by crushing the container and second flakes obtained by crushing the heat shrinkable film. It not only solves the environmental problems by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

Abstract: Embodiments relate to a heat shrinkable film and a process for regenerating a polyester container using the same. The heat shrinkable film comprises a copolymerized polyester resin comprising a diol component and a dicarboxylic acid component and has a heat shrinkage rate of 30% or more in the main shrinkage direction upon thermal treatment at a temperature of 80° C. for 10 seconds and a melting point of 190° C. or higher as measured by differential scanning calorimetry. It not only solves the environmental problems by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

Abstract: A process for regenerating a polyester container and regenerated polyester chips prepared therefrom. The process comprises preparing a polyester container provided with a heat shrinkable film; crushing the container provided with the heat shrinkable film to obtain flakes; and thermally treating the flakes to produce regenerated polyester chips, wherein when the flakes are thermally treated at a temperature of 200° C. to 220° C. for 60 minutes to 120 minutes, the clumping fraction is 5% or less, and the flakes comprise first flakes obtained by crushing the container and second flakes obtained by crushing the heat shrinkable film. It not only solves the environmental problems by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

Abstract: A heat shrinkable film and a process for regenerating a polyester container using the same. The heat shrinkable film comprises a copolymerized polyester resin comprising a diol component and a dicarboxylic acid component and has a heat shrinkage rate of 30% or more in the main shrinkage direction upon thermal treatment at a temperature of 80° C. for 10 seconds and a melting point of 190° C. or higher as measured by differential scanning calorimetry. It not only solves the environmental problems by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

Abstract: A passive air sampler is designed to allow for multiple sorbents and multiple sampling rates. The passive air sampler is also reusable and has interchangeable sorbents.

Abstract: The embodiments relate to a polyester film, which has a high tensile strength in the transverse direction and a low tensile strength in the longitudinal direction, while satisfying the condition of 0.5<A<6, A being calculated by Equation 1. A polyester film according to the embodiments can easily be cut in the transverse direction.

Abstract: The present invention relates to a radiant barrier sheet and a wood panel comprising same. The radiant barrier sheet comprises a polymer film, a first radiant reflective layer disposed on the polymer film, and a first protective layer disposed on the first radiant reflective layer, wherein the radiant barrier sheet has through-holes configured to penetrate through the polymer film and the first radiant reflective layer, the number of the through-holes ranges from 1 to 10 per 1 cm2, a planar area of the through-holes ranges from about 20,000 ?m2 to about 200,000 ?m2 per 1 cm2, and a diameter of the through-hole ranges from about 80 ?m to about 300 ?m.

Abstract: The embodiments relate to a polyester film, which has a high tensile strength in the transverse direction and a low tensile strength in the longitudinal direction, while satisfying the condition of 0.5<A<6, A being calculated by Equation 1. A polyester film according to the embodiments can easily be cut in the transverse direction.

Abstract: A solvent comprising 40 to 100 wt % of 1,3-dioxolane and 0 to 60 wt % of tetrahydrofuran, wherein the solvent further comprises 30 ppm to 800 ppm of an antioxidant, based on the total weight of the solvent, provides a long shelf life with good adhesive strength even after exposure to air. The solvent can be effectively used for labeling of heat-shrinkable polyester-based labels.

Abstract: A solvent comprising 40 to 100 wt % of 1,3-dioxolane and 0 to 60 wt % of tetrahydrofuran, wherein the solvent further comprises 30 ppm to 800 ppm of an antioxidant, based on the total weight of the solvent, provides a long shelf life with good adhesive strength even after exposure to air. The solvent can be effectively used for labeling of heat-shrinkable polyester-based labels.

Abstract: A hot air tunnel system apparatus comprising a preheating zone, a labeling zone, and a cooling zone with a transporting member provided through the lower parts of said zones to convey a product to be labeled from the preheating zone to the cooling zone, wherein each zone is equipped with fan heaters on both sides and on the bottom thereof, and also equipped with an air circulation system on the top thereof, which can minimize such labeling defects as loose labels, film curl, and irregular shrinkage when polyethylene-based products are labeled with heat-shrinkable labels.

Abstract: A multi-layer polymer film for printing and copying of the present invention comprising a two-layer polymer base film composed of layer A and layer B laminated on one side of the layer A, the layer B containing a filler in an amount of 50 to 3000 ppm and the layer A containing no filler or a filler in an amount of at least 1000 ppm and less than the B layer; an image receiving layer coated on the exposed surface of the layer A; and an antistatic layer coated on the exposed surface of the layer B, wherein the layer A having the image receiving coating layer and the layer B having the antistatic coating layer have average degrees of surface roughness (Ra) ranging from 10 to 60 nm and 50 to 150 nm, respectively, exhibits improved properties in terms of runnability, printing, optical (haze), antistatic, friction coefficient and anti-blocking properties, which can be advantageously used as an OHP film.

Abstract: A passive air sampler or badge suitable for wearing includes a vial adaptor to facilitate transferring granular or particulate adsorbent to and from it directly into a specially designed vial sized to accommodate a standard amount for use in a desorption tube for chromatographic or other analysis of the materials desorbed.

Abstract: A gas sampler includes an impact disc for removing larger particles from a gas flow drawn by a pump and a filter for capturing smaller particles, also positioned in the flow path. The sampler is conveniently dissembled and reassembled to remove and replace the impact disc and the filter. Particles removed, especially on the filter, may be observed or analyzed. The impact disc may be coated with an oil or other viscous substance to enhance its ability to retain larger particles. The flow path may be entirely annular after striking the impact disc—that is, around the outside of the impact disc but a portion of the flow path may proceed directly through a central aperture in the impact disc after striking it.