Provided are both a superabsorbent polymer capable of continuously and safely exhibiting an improved bacterial growth inhibitory property and a deodorant property without deterioration in the physical properties of the superabsorbent polymer, such as water retention capacity, absorption under pressure, etc., as well as a preparation method for the superabsorbent polymer.

A method for recycling a polyester fabric is provided. The method includes providing a polyester fabric that is dyed and has dye and water repellent attached thereon, providing a composite solvent containing water and acetic acid mixed with each other, performing an extraction operation including infiltrating the polyester fabric with the composite solvent and extracting the dye and the water repellent, and carrying out a liquid state polycondensation reaction on the polyester fabric so that an intrinsic viscosity of the polyester fabric is increased and residual impurities of the polyester fabric are further removed.

A method for recycling a polyester fabric is provided. The method includes providing a polyester fabric that is dyed and has dye and water repellent attached thereon, providing a composite solvent containing water and acetic acid mixed with each other, performing an extraction operation including infiltrating the polyester fabric with the composite solvent and extracting the dye and the water repellent, and carrying out a liquid state polycondensation reaction on the polyester fabric so that an intrinsic viscosity of the polyester fabric is increased and residual impurities of the polyester fabric are further removed.

The present invention relates to a method for preparing thermoplastic polymer particles, the method comprising the steps of: (1) extruding a thermoplastic polymer resin by means of an extruder; (2) granulating the extruded polymer resin by using an inert gas; and (3) cooling the granulated thermoplastic polymer resin, and thermoplastic polymer particles prepared thereby.

The present invention relates to a method for preparing thermoplastic polymer particles, the method comprising the steps of: (1) extruding a thermoplastic polymer resin by means of an extruder; (2) granulating the extruded polymer resin by using an inert gas; and (3) cooling the granulated thermoplastic polymer resin, and thermoplastic polymer particles prepared thereby.

An objective of the present invention is to provide a production method that enables PHA (e.g. PHA powder) to be produced with high productivity. The above is achieved by providing: a method for producing a polyhydroxyalkanoate, including the steps of (a) preparing an aqueous suspension that contains a polyhydroxyalkanoate and an alkylene oxide-based dispersing agent and has a pH of not more than 7 and (b) spray-drying the aqueous suspension prepared in the step (a); and the like.

An objective of the present invention is to provide a production method that enables PHA (e.g. PHA powder) to be produced with high productivity. The above is achieved by providing: a method for producing a polyhydroxyalkanoate, including the steps of (a) preparing an aqueous suspension that contains a polyhydroxyalkanoate and an alkylene oxide-based dispersing agent and has a pH of not more than 7 and (b) spray-drying the aqueous suspension prepared in the step (a); and the like.

A superabsorbent polymer hydrogel chopping device is provided. The superabsorbent polymer hydrogel chopping device includes a barrel body having a transfer space to which a hydrogel is transferred therein and a discharge portion through which the hydrogel is discharged is formed to face in a ground direction, a transfer unit installed in the barrel body and configured to transfer the hydrogel in the transfer space, a cutter member installed in the barrel body and configured to pulverize the hydrogel transferred by the transfer unit, and a perforated plate configured to discharge particles of the hydrogel pulverized by the cutter member to the outside of the barrel body.

The present invention relates to a sinter powder (SP) comprising at least one semicrystalline terephthalate polyester (A) which is prepared by reacting at least one aromatic dicarboxylic acid (a) and at least two aliphatic diols (b1) and (b2), where the aliphatic diol (b1) is neopentyl glycol. The present invention further relates to a method of producing the sinter powder (SP), and to a method of producing a shaped body by sintering the sinter powder (SP). The present invention further relates to the shaped body obtainable by the sintering. The present invention also relates to the use of the sinter powder (SP) in a sintering method.

The present invention relates to a sinter powder (SP) comprising at least one semicrystalline terephthalate polyester (A) which is prepared by reacting at least one aromatic dicarboxylic acid (a) and at least two aliphatic diols (b1) and (b2), where the aliphatic diol (b1) is neopentyl glycol. The present invention further relates to a method of producing the sinter powder (SP), and to a method of producing a shaped body by sintering the sinter powder (SP). The present invention further relates to the shaped body obtainable by the sintering. The present invention also relates to the use of the sinter powder (SP) in a sintering method.