A transparent antibacterial plastic film and a method for manufacturing the same are provided. The transparent antibacterial plastic film includes a polyester material and an antibacterial composite dispersed in the polyester material. A refractive index of the antibacterial composite ranges from 1.46 to 1.66. The method for manufacturing the transparent antibacterial plastic film includes steps of: mixing the polyester material and the antibacterial composite to form antibacterial masterbatches, and using the antibacterial masterbatches to form the transparent antibacterial plastic film. A refractive index of the antibacterial composite ranges from 1.46 to 1.66.

A polyurethane foam may include an isocyanate polymer component and a polyol component. The polyol component may include a polyol having a molecular weight of at least about 500 kg/mol and not greater than about 6000 kg/mol. The polyurethane foam may have an elongation of at least about 500%. The polyurethane foam may further have a density of at least about 250 g/L and a tensile strength of not greater than about 1000 kPa.

A foamed sheet includes an aliphatic polyester resin and a filler. A degree of hydrophohization of the filler is 50% by mass or more, and a pH of the filler is 6.5 or lower. A manufacture includes the foamed sheet and a method can be used for producing the foamed sheet.

A foamed sheet includes an aliphatic polyester resin and a filler. An average foam diameter of the foamed sheet is 15 micrometers or less. An average thickness of the foamed sheet is 3,000 micrometers or less. A ratio of a length of a side of the foamed sheet in a longer direction or a side of the foamed sheet in a direction perpendicular to the longer direction to the average thickness is 250 or more.

The present invention is related to a process for the production of a vinyl aromatic (co)polymer comprising the steps of: a) mixing a fraction (A) comprising one or more monomers selected from the group consisting of styrene, alpha-methyl styrene, acrylonitrile, methyl (meth)acrylate, (meth)acrylic acid and butadiene with a fraction (B) comprising post-consumer recycled vinyl aromatic (co)polymer, wherein the weight ratio of fraction (B) to fraction (A) is comprised between 0.01/1 and 1/1, preferably between 0.05/1 and 0.5/1 b) subjecting the resulting mixture to a free-radical polymerization and polymerizing to a monomer conversion up to 90%, to obtain a polymerized mixture comprising vinyl aromatic (co)polymer; c) vacuum devolatizing the polymerized mixture and recovering vinyl aromatic (co)polymer characterized by a weight average molecular weight comprised between 100,000 and 400,000 g/mol;
wherein one or more bromine derivative capture agents are added before, and/or during and/or after at least one of the steps a) to c); and
wherein 100 parts of one or more bromine derivative capture agents comprises at least 50 parts by weight of hydrotalcite of the formula:

[Mg.sub.1-x Al.sub.x(OH).sub.2].sup.x+(CO.sub.3).sub.x/2.mH.sub.2O

wherein: 0<x≤0.5, and m is a positive number.

The present invention is also related to expandable and extruded expanded vinyl aromatic (co)polymer compositions obtained from vinyl aromatic (co)polymers comprising post-consumer and/or post-industrial vinyl aromatic (co)polymer and to a process for the production of said expandable and extruded expanded vinyl aromatic (co)polymer compositions.

The combined use of polyol esters and cationic polyelectrolytes as additives in cosurfactant-containing aqueous polymer dispersions for production of porous polymer coatings, preferably for production of porous polyurethane coatings, is described.

A method of foam production is described. The method includes providing a foam precursor including one or more components, the one or more components including at least one of chitin, chitosan, or chitosan oligosaccharide and a solvent. The method further comprises exposing the foam precursor to radiation. The radiation is of a wavelength to heat the foam precursor. A system for foam produced is described, the system including a mixer configured to output a foam precursor including one or more components. The one or more components include at least one of chitin, chitosan, or chitosan oligosaccharide. The system further includes a radiation emitting system positioned to receive the foam precursor from the mixer and expose the foam precursor to radiation to heat the foam precursor to form a solid foam.

The present invention concerns a solid nanocomposite material consisting of a polymer-matrix in which are dispersed alkali metal, hydronium or ammonium salts of polyanionic components, wherein the polymer-matrix comprises at least a linear or branched polymer or copolymer containing one or several poly(ethylene oxide) (PEO) chains, said polymer or copolymer being optionally crosslinked and each PEO chain having at least 4 ethylene oxide monomer units. The present invention relates also to a photonic, e.g. optoelectronic, device comprising such a nanocomposite material. Such material and device can be used as phosphorescence emitter, for crop growth lighting or for generating singlet oxygen.

A crosslinked olefin-based thermoplastic elastomer expanded bead including a base polymer having an olefin-based thermoplastic elastomer and a brominated bisphenol-based flame retardant having a chemical structure represented by formula (1). A difference Tm.sub.TPO-T.sub.FR is −5° C. to 40° C., where Tm.sub.TPO is a melting point of the olefin-based thermoplastic elastomer and T.sub.FR is the lower of a glass transition temperature T.sub.gFR and a melting point Tm.sub.FR of the brominated bisphenol-based flame retardant. A xylene insoluble content is 5 mass % to 80 mass %. R.sup.1 and R.sup.3 in the formula (1) are monovalent substituents, R.sup.2 is a divalent substituent, and n is an integer from 1 to 6:

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A stretch film (1) contains an olefin elastomer and an inorganic filler (3). Stress at 50% elongation is 6.0 N or more and 15.0 N or less, and moisture permeability is 1000 g/(m.sup.2.Math.24 h) or more.