A porous composition comprising a porous organic polymer (POP) fiber having a diameter of at least 100 nm and a length of at least 1 mm and pores having a size within a range of 10 nm to 5 microns distributed over the surface and volume of the POP fiber, wherein the organic polymer is insoluble in water and may be selected from, e.g., polyolefins, polyesters, polyamides, and polyacrylonitrile. Also described herein is a method for producing a POP fiber comprising: (i) forming a precursor fiber from a blend of an organic polymer and lignin, wherein the lignin is present in the form of domains within the precursor fiber; and (ii) washing the precursor fiber with a solvent that dissolves the lignin to result in the POP fiber. Also described herein is a method for removing oil from an oil-water mixture comprising contacting the oil-water mixture with the POP fibers.

The 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, a melting point of 190° C. or higher as measured by differential scanning calorimetry, and a peak temperature (Tp) of 95° C. to 115° C. as measured in the endothermic and exothermic curve (heat flow) by differential scanning calorimetry. It not only solves the environmental problem by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

A polyester film for embossing and a method for manufacturing the same are provided. The polyester film for embossing is made from a recycled polyester material. The polyester film for embossing includes a base layer and a surface coating layer. The base layer is formed from a polyester composition.

The polyester composition includes regenerated polyethylene terephthalate as a main component. The surface coating layer is disposed on at least one surface of the base layer. A material of the surface coating layer includes a main resin, fillers, and melamine. Based on a total weight of the surface coating layer being 100 wt %, an existing amount of the main resin is 45 wt % to 95 wt %, an existing amount of the fillers is 0.1 wt % to 30 wt %, and an existing amount of the melamine is 0.01 wt % to 25 wt %.

The present invention relates to a pellet of a liquid crystal polyester resin composition, including a liquid crystal polyester resin (A) and an inorganic filler (B), in which the pellet has voids with a sphere equivalent diameter of 10 μm to 1000 μm, an abundance ratio of voids having a sphere equivalent diameter of less than 400 μm in a total amount of the voids is in a range of 40% to 90%, and an average number of the voids in one pellet having a length of 1 mm to 5 mm and a maximum diameter of 1 mm to 3 mm is in a range of 4 to 9.

A method for producing molded foam articles that molds molded foam articles continuously, the method comprising continuously repeating the following step 1, step 2, step 3 and step 4 in this order; wherein step 1 comprises melting a resin composition that includes a liquid crystal polyester; step 2 comprises introducing, with an introduction device, a supercritical fluid that is unreactive, in a supercritical state, with the liquid crystal polyester, and is a gas at normal temperature and normal pressure, into the resin composition in an amount of at least 0.1 parts by mass but not more than 0.3 parts by mass per 100 parts by mass of the liquid crystal polyester, and then melt-kneading the resultant mixture; step 3 comprises injecting the melt-kneaded resin composition containing the supercritical fluid into a mold; and step 4 comprises conducting foaming by lowering at least one of the pressure and the temperature of the supercritical fluid contained in the resin composition to a value below the critical point of the supercritical fluid, thereby producing a molded foam article. This liquid crystal polyester has a melt tension at a temperature 20° C. higher than the flow start temperature of at least 5 mN but not more than 100 mN.

The polyester film according to the embodiment can maintain its original characteristics even after a plurality of repeated folding by adjusting the deformed dimension as compared with the initial dimension of the film, in particular, by adjusting the ratio between the deformed dimensions in two in-plane directions perpendicular to each other to a specific range, in the cycle of straining and relaxing the film. Accordingly, the polyester film can be applied to a cover of a flexible display device, in particular, a foldable display device to exhibit excellent characteristics.

An aquatic plant biomass-based decomposable and antibacterial plastic masterbatch composition contains: environmental biodegradable polymer materials, aquatic plant fiber materials, natural decomposable polymer, antibacterial materials, mineral fillers, Bis (2-ethylhexyl) adipate (DOA), 1,1,1-Tris Methylolpropane 1,1,1-Trimethylolpropane (TMP), and silane coupling agent. Thereby, low cost, excellent mechanical properties, release of far infrared rays and antibacterial effect are achieved.

Resin particles include a binder resin in each of the resin particles. The binder resin includes a biomass-derived resin, and polyethylene terephthalate or polybutylene terephthalate. An amount A of a biomass-derived component of the biomass-derived resin and an amount B of the polyethylene terephthalate or the polybutylene terephthalate satisfy A>B. Each of the resin particles has a core-shell structure including a shell layer and a core layer. An average thickness of the shell layer is from 100 nm to 500 nm.

The invention relates to a process for depolymerizing a polyester feedstock comprising PET, said process comprising, prior to the step of depolymerization by glycolysis and to the step of purification of the depolymerization effluent, an improved step of conditioning the feedstock in which the polyester feedstock is conditioned in terms of temperature and pressure and then mixed with a diol effluent in a static or dynamic mixer in order in particular to substantially reduce the viscosity of the feedstock.

Provided is an additive based on micro and nano particles of zinc, silver and copper metal for preparing a polymer material with antiviral and virucidal properties. The material is used to form or produce surfaces, containers of all types, garments, safety equipment, fabrics, paints, coatings or other items and reduces the growth or presence of respiratory viruses.