A method for preparing a thermoplastic polyurethane elastomer material with micro air holes is provided. The method comprises the following steps: (1) is feeding liquid raw materials such as diisocyanate molecules and solid additives into a double-screw reactor to trigger a polymerization type chain extension reaction and then obtain a macromolecular weight hot melt. (2) is pushing the macromolecular weight hot melt into a mixing extruder and allowing the reaction to continue to obtain a macromolecular thermoplastic polyurethane melt. (3) is continuously adding the obtained macromolecular thermoplastic polyurethane melt together with polymer particles into a foaming extruder, and extruding the high-pressure hot melt from a mold head into an underwater granulation chamber. (4) is delivering the particles obtained after granulation into a separator by process water via a multi-stage pressure-release process water pipeline, separating, screening and drying the required particles to obtain the target product.

The present disclosure relates to compositions comprising 2,3,3,3-tetrafluoropropene that may be useful as heat transfer compositions, aerosol propellants, foaming agents, blowing agents, solvents, cleaning agents, carrier fluids, displacement drying agents, buffing abrasion agents, polymerization media, expansion agents for polyolefins and polyurethane, gaseous dielectrics, extinguishing agents, and fire suppression agents in liquid or gaseous form. Additionally, the present disclosure relates to compositions comprising 1,1,2,3-tetrachloropropene, 2-chloro-3,3,3-trifluoropropene, or 2-chloro-1,1,1,2-tetrafluoropropane, which may be useful in processes to produce 2,3,3,3-tetrafluoropropene.

Disclosed is a process for producing a thermoformable and/or embossable particle/polymer composite using a ground particulate biological substrate S of nutrient tissue and a polymer P, characterized in that (i) the substrate S and the polymer P are homogeneously mixed, then (ii) the substrate S/polymer P mixture is converted into a particle layer, and thereafter (iii) the resulting particle layer is densified at a temperature higher than or equal to the glass transition temperature of the polymer P [Tg.sup.P] to form a thermoformable and/or embossable particle/polymer composite,
where (a) the substrate S comprises extracted ground coffee beans; and (b) the polymer P is thermoplastic and has a Tg.sup.P≥20° C. measured according to DIN EN ISO 11357-2 (2013-09).

Furthermore, a process for the manufacturing of a particle/polymer molding, a particle/polymer molding and its use as an element in buildings or in furniture are disclosed.

A foamable polymer composition is disclosed comprising a thermoplastic matrix polymer composition, and a tri-blend blowing agent composition. The tri-blend blowing agent comprises 5 wt. % to 55 wt. % of a fluorinated alkene having a GWP less than 5; 30 wt. % to 80 wt. % of a first co-blowing agent comprising a hydrofluorocarbon (HFC) blowing agent having a GWP less than 200; and 0.25 to 25 wt. % of a second co-blowing agent comprising an HFC blowing agent having a GWP above 500. The tri-blend blowing agent composition has a total GWP of less than 550.

The present invention aims to provide a foam that is less likely to deflate even after prolonged or repeated load application, has low density, and has good appearance quality, and a method for producing the foam. Provided is a foam including cells dispersed in an elastomer resin, the foam having a thickness of 300 μm or greater, the foam having a surface layer that is a portion from a surface to a depth of 100 μm and a center portion that is a portion other than the surface layer, the cells in the surface layer having an average circularity of 0.980 or greater, the cells in the center portion having an average circularity of 0.990 or greater, the cells having an average diameter of 70 μm or greater.

The present invention aims to provide a foam that is less likely to deflate even after prolonged or repeated load application, has low density, and has good appearance quality, and a method for producing the foam. Provided is a foam including cells dispersed in an elastomer resin, the cells having an average diameter of 40 to 60 μm and an average circularity of 0.990 or greater.

The present disclosure provides an impregnation device for a fiber prepreg, which includes a film layer separation assembly, a hot pressing element, and a thermal barrier element. The hot pressing element is disposed beneath the film layer separation assembly. The thermal barrier element is disposed between the film layer separation assembly and the hot pressing element. The present disclosure also provides an impregnation method for a fiber prepreg.

Compositions and processes for the tertiary recycling of mixed plastic waste into a stable and homogeneous plastic feedstock material are provided. The processes and compositions allow for the tertiary recycling of unsorted, unwashed and unidentified mixed plastic waste, including waste mixtures comprising polymer macromolecules with different molecular weights and polymer chain lengths. The processes include the blending of a mixed plastic waste feedstock with a recycling composition and virgin carrier materials comprising at least one alluvium material.

The present invention discloses composite substances that can be used in the production of objects and building materials by means of fusion thereof, and provide particular physical properties, including barrier to the transmission of ultraviolet radiation and to the transfer of liquids and gases, whereby said composite substances present thermoplastic matrixes that include synthetic polymers and/or bio-polymers, as well as further vegetal fibre associated with at least one sub-product from the processing of an edible vegetal substance, thereby providing a new economic utilization of such sub-products, and composite substances with a high degree of bio-degradation once of the disposal thereof.

The present invention further discloses uses of said composite substances and processes for production of said composite substances.

The present invention relates to heat transfer compositions comprising 1-chloro-1,2 difluoroethylene for use in refrigeration, air conditioning, heat pump systems, chillers, and other heat transfer applications. The inventive heat transfer compositions can possess reduced global warming potential while providing good capacity and performance while providing preferable flammability characteristics