Described herein are methods of preparing cutin-derived monomers, oligomers, or combinations thereof from cutin-containing plant matter. The methods can include heating the cutin-derived plant matter in a solvent at elevated temperature and pressure. In some preferred embodiments, the methods can be carried out without the use of additional acidic or basic species.

Described herein are methods of preparing cutin-derived monomers, oligomers, or combinations thereof from cutin-containing plant matter. The methods can include heating the cutin-derived plant matter in a solvent at elevated temperature and pressure. In some preferred embodiments, the methods can be carried out without the use of additional acidic or basic species.

An ultraviolet-absorbing polyester film and a method for manufacturing the same are provided. The ultraviolet-absorbing polyester film includes a physically recycled polyester resin and a chemically recycled polyester resin. The physically recycled polyester resin is formed by a plurality of physically recycled polyester chips. The chemically recycled polyester resin is formed by a plurality of chemically recycled polyester chips. The plurality of chemically recycled polyester chips further includes chemically recycled electrostatic pinning polyester chips. The chemically recycled electrostatic pinning polyester chips contain electrostatic pinning additives, and the electrostatic pinning additives are metal salts. Expressed in percent by weight based on a total weight of the ultraviolet-absorbing polyester film, a content of the electrostatic pinning additives is between 0.005% and 0.1% by weight. The ultraviolet-absorbing polyester film further contains an ultraviolet absorber.

A polyester film for laser embossing and a method for manufacturing the same are provided. The polyester film for laser embossing is made from a recycled polyester material, and includes a base layer and a skin layer. The skin layer is disposed on at least one surface of the base layer. The skin layer is formed from a first polyester composition. The first polyester composition includes regenerated polyethylene terephthalate as a main component and at least one component selected from 1,4-butanediol, isophthalic acid, neopentyl glycol, 2-methyl-1,3-propanediol, pentanediol, isopentyldiol, adipic acid, and 1,4-cyclohexanedimethanol, so that a melting point of the skin layer ranges from 190° C. to 240° C.

A polyester film for laser embossing and a method for manufacturing the same are provided. The polyester film for laser embossing is made from a recycled polyester material, and includes a base layer and a skin layer. The skin layer is disposed on at least one surface of the base layer. The skin layer is formed from a first polyester composition. The first polyester composition includes regenerated polyethylene terephthalate as a main component and at least one component selected from 1,4-butanediol, isophthalic acid, neopentyl glycol, 2-methyl-1,3-propanediol, pentanediol, isopentyldiol, adipic acid, and 1,4-cyclohexanedimethanol, so that a melting point of the skin layer ranges from 190° C. to 240° C.

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 %.

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 separation method separates a polyalcohol compound from water, so as to obtain a purified product stream comprising the polyalcohol compound in output concentration of at least 90 wt %. Thereto, a mixture of the polyalcohol compound and water is provided, said mixture having a polyalcohol concentration. The polyalcohol concentration of mixture is increased in an evaporation stage, at least a portion of which is operated in at first pressure. Subsequently, the mixture is treated in distillation stage to be deliver the stream comprising the polyalcohol compound in the output concentration of at least 90 wt %, which distillation stage is operated at a second pressure. Herein, the distillation stage is operated to produce steam output, that optionally compressed to a third pressure and is coupled to the evaporation stage. The second pressure and/or any third pressure is higher than first pressure. The reactor system is configured for performing the separation method.

The separation method separates a polyalcohol compound from water, so as to obtain a purified product stream comprising the polyalcohol compound in output concentration of at least 90 wt %. Thereto, a mixture of the polyalcohol compound and water is provided, said mixture having a polyalcohol concentration. The polyalcohol concentration of mixture is increased in an evaporation stage, at least a portion of which is operated in at first pressure. Subsequently, the mixture is treated in distillation stage to be deliver the stream comprising the polyalcohol compound in the output concentration of at least 90 wt %, which distillation stage is operated at a second pressure. Herein, the distillation stage is operated to produce steam output, that optionally compressed to a third pressure and is coupled to the evaporation stage. The second pressure and/or any third pressure is higher than first pressure. The reactor system is configured for performing the separation method.

The invention relates to a process of preparing a glycolide product from methyl polyglycolate or its product. The process comprises depolymerizing the methyl polyglycolate or its product in the presence of a depolymerization agent to make a depolymerized product; repolymerizing the depolymerized product to make a glycolic acid oligomer; and pyrolyzing the repolymerized mixture to make a glycolide product. A rare earth metal catalyst may be used facilitate the depolymerization reaction. The glycolide pyrolysis conversion rate may be greater than 90%. Also provided are related glycolide product and the glycolic acid oligomer. The glycolic acid oligomer may have a weight average molecular weight of 4,000-80,000.