The invention present invention belongs to waste polyester recycling technology field and relates to a method and a device for recycling waste polyester, in particular to a method and a device for recycling waste polyester by modified chemical method to recover waste polyester to prepare dimethyl terephthalate (DMT). The recycling method of the present invention uses a process of continuous feeding, continuous alcoholysis and continuous transesterification. It can make the material undergo homogeneous alcoholysis in the melted state, and the required alcoholysis time is short. Because more than two alcoholysis tanks are used in series for continuous alcoholysis, the product quality of alcoholysis product is stable. When the alcoholysis product is continuously transesterified, it avoids the occurrence of side reactions and the unstable quality of the transesterified product, and the purity and yield of recycling product of waste polyester are greatly improved.

A thermoplastic polyester elastomer conjugate fiber including a core and a sheath is provided. A volume ratio of the core to the sheath is in a range of 4:6 to 6:4.

A plasma processing device may include first and second processing devices. The first processing device may include a first chamber, a first exhaust pump which provides, into the first chamber, a first pressure equal to or higher than 0.1 Pa and equal to or lower than 0.3 Pa while depressurizing the first chamber, a first holding unit which holds resin, a first gas introduction unit which introduces, into the first chamber, first gas for desorbing at least a part of atoms constituting the resin from a surface of the resin when turned into plasma, and a first plasma generation unit which turns the first gas into plasma at the first pressure. The second processing device may include a grounded second chamber, a second exhaust pump which provides, into the second chamber, a second pressure equal to or higher than 30% and equal to or lower than 50% of the first pressure at which the desorption step has been performed while depressurizing the second chamber, a second holding unit which holds the resin processed in the first chamber and to which a first DC voltage may be applied, a second gas introduction unit which introduces, into the second chamber, second gas to generate hydroxyl radicals by being turned into plasma, and a second plasma generation unit which turns the second gas into plasma at the second pressure and to which a second DC voltage higher than the first DC voltage may be applied.

A method of producing thermoplastic particles may comprise: mixing a melt emulsion comprising (a) a continuous phase that comprises a carrier fluid having a polarity Hansen solubility parameter (dP) of about 7 MPa.sup.0.5 or less, (b) a dispersed phase that comprises a dispersing fluid having a dP of about 8 MPa.sup.0.5 or more, and (c) an inner phase that comprises a thermoplastic polyester at a temperature greater than a melting point or softening temperature of the thermoplastic polyester and at a shear rate sufficiently high to disperse the thermoplastic polyester in the dispersed phase; and cooling the melt emulsion to below the melting point or softening temperature of the thermoplastic polyester to form solidified particles comprising the thermoplastic polyester.

The present disclosure relates to a method and a composition comprising an esterase for enzymatic surface modification of a polyester. The present disclosure also relates to a method of degradation or hydrolysis of an insoluble plant material.

A biaxially oriented polyester film having the following physical property is provided: when cooled from the molten state at a cooling rate of 20° C./min, an observed recrystallization temperature is 175° C.-200° C. The biaxially oriented polyester film is formed by a thick sheet before bidirectional stretching that is melted and extruded by an extruder and then cooled and formed on a casting roll. The thick sheet before stretching having the following physical property as analyzed by differential scanning calorimetry: a crystallization rate is less than 10%.

A surface-treated inorganic nanoparticle including an inorganic nanoparticle, a first dispersant connected to the inorganic nanoparticle, and a second dispersant connected to the inorganic nanoparticle, wherein a molecular weight (MW) of the first dispersant is different from a molecular weight (MW) of the second dispersant.

Spherical thermoplastic polymer powders useful for additive manufacturing may be made at high throughputs by a method comprising polymer in a dispersing medium at a temperature above the polymer melting temperature (Tm) under shear for short times (e.g., less than 30 minutes) to form a mixture that is then rapid (faster than ambient cooling) cooled below Tm. The method is particularly useful for thermoplastic polymers having a high melt flow index (MFI) or low capillary viscosity at high shear (˜1000 s.sup.−1) within 20 or 30° C. of the polymer's melt temperature. The method may also include a crystallizing temperature below Tm and above the glass transition temperature Tg of the polymer to crystallize amorphous polymers or increase the crystallinity of semi-crystalline polymers.

The present invention relates to a masterbatch composition comprising high concentration of biological entities having a polymer-degrading activity and uses thereof for manufacturing biodegradable plastic articles.

A fiber reinforced polyester polymer composition is disclosed that contains at least one tribological modifier. The tribological modifier may comprise an ultra-high molecular weight silicone alone or in combination with polyytetrafluoroethylene particles. The composition not only has excellent tensile properties but also can produce a low friction surface.