178 results about "Polyethylene terephtalate" patented technology

The present application relates to the technical field of bio-based polymer material, and more particularly to a full bio-based PBAT-PLA copolymer, a preparation method and an application thereof, which is prepared by melt mixing bio-based polybutylene adipate terephthalate, bio-based polylactic acid and bio-based multi-epoxy chain extender through a twin-screw extruder, so that the tensile strength of the full bio-based PBAT-PLA copolymer is 31.5-44.3 MPa, and the elongation at break is 85-498%. The bio-based multi-epoxy chain extender prepared by specific selection can simultaneously improve the tensile strength and elongation at break of the full bio-based PBAT-PLA copolymer, and solve the technical problems of poor compatibility of traditional bio-based polylactic acid and non-bio-based polybutylene adipate terephthalate, and the technical problem that the addition of existing chain extenders cannot simultaneously improve the tensile strength and elongation at break of the copolymer.

The application belongs to the technical field of plastics, and particularly relates to a degradable antibacterial plastic packaging bag and a preparation method thereof. The degradable antibacterial plastic packaging bag comprises the following raw materials in parts by weight: polycaprolactone 70-90 parts; polybutylene adipate terephthalate 20-40 parts; Cr and Cu co-modified ZIF-8 5-20 parts; and cerium oxide tannic acid material 2-6 parts. The Cr and Cu co-modified ZIF-8 synergistically improves the antibacterial performance of the packaging bag, and the addition of the cerium oxide tannic acid material further improves the antibacterial performance of the packaging bag. Moreover, the degradable antibacterial plastic packaging bag prepared by the application has excellent mechanical properties.

The invention discloses a modified polylactic acid high-temperature-resistant degradable composite material and a preparation method thereof, and relates to the technical field of degradable materials. The modified polylactic acid high-temperature-resistant degradable composite material at least comprises the following raw materials in parts by mass: 70-80 parts of polylactic acid; 15 to 25 parts by mass of a lignin-polylactic acid-polycaprolactone block copolymer; 5 to 10 parts by mass of poly (butylene adipate-co-terephthalate); 2-5 parts by mass of stearic acid modified nano silicon dioxide; 0.3 to 0.8 part by mass of an anti-hydrolysis agent; and 0.2 to 0.5 part by mass of an antioxidant. According to the prepared modified polylactic acid high-temperature-resistant degradable composite material, the mechanical property and the high temperature resistance of the polylactic acid composite material are improved, the degradation rate can be regulated and controlled through the proportion of all the components, and the use requirements of different scenes are met.

The invention belongs to the technical field of degradable packaging materials, and discloses a preparation method of a degradable preservative film. The anti-fog antibacterial plastic is prepared from the following raw materials in parts by weight: 40 to 45 parts of poly (butylene adipate-co-terephthalate) (PBAT), 8 to 12 parts of polylactic acid (PLA), 28 to 32 parts of modified structural starch, 4 to 6 parts of poly (butylene carbonate) (PBC), 4 to 6 parts of talcum powder, 0.4 to 0.6 part of aluminate, 0.8 to 1.2 parts of a composite antibacterial agent and 2.5 to 3.5 parts of anti-fog master batch. The invention aims to overcome the defects in the prior art, and provides the degradable preservative film and the preparation method thereof, the preservative film not only has good degradability and mechanical properties, but also has excellent antibacterial and antifogging effects, and the preparation process is simple and easy for industrial production.

The invention discloses a degradable high-strength plastic bag and a preparation method thereof, and relates to the technical field of plastic bag preparation. The degradable high-strength plastic bag at least comprises the following raw materials in parts by mass: 40-60 parts of polylactic acid, 20-35 parts of poly (adipic acid) / butylene terephthalate, 5-15 parts of modified nano calcium carbonate, 3-8 parts of modified wood fibers, 6-8 parts of chitosan grafted polyglycidyl methacrylate nanoparticles, 0.5-2 parts of a lubricant, 0.3-1 part of an antioxidant and 2-5 parts of a degradation accelerator. And 0.5 to 1.5 parts of an ultraviolet stabilizer. According to the degradable high-strength plastic bag prepared by the preparation method disclosed by the invention, the polylactic acid and the poly (butylene adipate-co-terephthalate) are used as base materials, the modified nano calcium carbonate and the modified fibers are used as fillers, and the chitosan grafted polyglycidyl methacrylate nanoparticles are used as a compatilizer, so that the balance of high strength and degradability is realized; the prepared degradable high-strength plastic bag can be used as a high-performance flexible packaging material.

The invention belongs to the technical field of preparation of molecular materials and adhesive tapes, and discloses a degradable mylar adhesive tape and a preparation method thereof, the degradable mylar adhesive tape comprises a degradable base material layer and a degradable adhesive layer; the degradable base material layer is prepared from the following raw materials in parts by mass: 25-35 parts of poly (butylene succinate) (PBS), 20-30 parts of polylactic acid (PLA), 10-15 parts of polycaprolactone (PCL), 8-12 parts of modified bamboo fiber powder, 3-5 parts of a compatibilizer and 0.5-1 part of an antioxidant; the degradable adhesive layer is prepared from the following raw materials in parts by mass: 40 to 50 parts of a modified starch-based adhesive, 15 to 25 parts of poly (butylene adipate-co-terephthalate) (PBAT), 10 to 15 parts of polyhydroxyalkanoate (PHA), 5 to 8 parts of sodium alginate-chitosan composite gel, 5 to 8 parts of an epoxypropane modifier, 1 to 2 parts of a cross-linking agent and 0.3 to 0.5 part of a de-foaming agent; by optimizing the raw material composition and the preparation process of the base material and the adhesive, the full-life-cycle degradability of the adhesive tape is realized, and meanwhile, excellent mechanical properties, insulativity and temperature resistance are ensured.

Described is a method of preparing bis (2-hydroxyethyl) terephthalate (BHET) monomer crystals comprising the steps of providing a mixture of BHET monomers and oligomers thereof, a carrier liquid, and impurities; providing BHET seed crystals in the mixture; forming BHET monomer crystals from the mixture comprising the BHET seed crystals, thereby obtaining BHET monomer crystals in a mother liquor; and separating the BHET monomer crystals from the mother liquor; wherein the powder X-ray diffraction spectrum of the BHET seed crystals at least has characteristic intensity peaks at 2Ɵ about equal to 10.7°, 14.4°, 18.9° and 21.6°, where Ɵ is the angle of diffraction, and / or the IR spectrum of the BHET seed crystals at least has characteristic absorption peaks at λ about equal to 3260 cm-1 and 897 cm-1, where λ is the ordinary wavenumber. The obtained BHET monomer crystals have superior filtration properties. Also described is a method of preparing the BHET seed crystals, a method of depolymerizing a terephthalate polymer using the BHET seed crystals, as well as a corresponding reactor system for depolymerizing said terephthalate polymer.

The present application relates to the field of batteries and specifically discloses a lithium battery sealing material and a preparation method thereof. The lithium battery sealing material comprises the following raw materials in parts by weight: 100-150 parts of nylon, 5-15 parts of maleic anhydride grafted polypropylene, 10-20 parts of rosin glycerol ester, 5-10 parts of poly(trimethylene terephthalate), 5-15 parts of filler, 0.5-1 part of antioxidant, and 0.2-0.5 parts of dispersant. The preparation method comprises the following steps: uniformly mixing nylon, poly(trimethylene terephthalate), and maleic anhydride grafted polypropylene to obtain a primary mixture; uniformly mixing the filler and rosin glycerol ester, and then uniformly mixing the filler and the rosin glycerol ester with the primary mixture to obtain a mixture; adding the antioxidant and the dispersant to the mixture, stirring evenly, and extruding to obtain a finished product. The hygroscopicity of a button battery sealing ring is reduced, and the sealing ring is ensured to have high mechanical strength, good sealing effect, and long service life, thereby extending the service life of the button battery.

The invention relates to the technical field of bio-based degradable high polymer materials, in particular to a bio-based degradable pearl wool microcellular foaming material. The composite material is prepared from the following components in parts by mass: 70-85 parts of a bio-based polyester resin composite system of polylactic acid and poly (terephthalic acid)-butylene adipate (in a mass ratio of 60: 40-75: 25), 10-20 parts of bagasse microfibers modified by a silane coupling agent, 1.5-4 parts of a composite nucleating agent of flaky talcum powder and spherical nano calcium carbonate (in a mass ratio of 1.5: 1-2.5: 1), the bio-based plasticizer is prepared by compounding epoxidized soybean oil and tributyl citrate, the montmorillonite degradation accelerant is loaded with iron and cobalt ions (the molar ratio is 3: 1-5: 1), and the mixed foaming agent is prepared from 5-12 parts of supercritical carbon dioxide and nitrogen (the volume ratio is 60%-85%). A bio-based polyester composite system of polylactic acid and PBAT is adopted, silane modified bagasse microfibers are matched, montmorillonite loaded with iron and cobalt ions serves as a degradation accelerant, a bio-based plasticizer and the like are combined, and the composite material is prepared through a twin-screw extrusion melt blending and supercritical fluid foaming technology.

The invention discloses a deep embossing polyester facing film, a preparation method thereof and a polyester film facing plate. The polyester facing film is prepared from the following raw materials in percentage by weight: 10 to 20 percent of flame-retardant polyester and the balance of poly (1, 4-cyclohexanedimethanol terephthalate); the flame-retardant polyester is prepared by condensation polymerization of a first esterification product and a second esterification product in a mass ratio of (60-70): (20-30), the raw materials of the first esterification product comprise terephthalic acid and 1, 4-cyclohexanedimethanol in a molar ratio of 1: (1.05-1.3), and the raw materials of the second esterification product comprise a benzoxazine phosphate monomer and dihydric alcohol in a molar ratio of 1: (1.1-1.3). The benzoxazine phosphate chain segment is introduced into the PCT, so that the flame retardant property of the polyester facing film is remarkably improved on the basis of not keeping the mechanical property and the processability of the polyester material.

The invention relates to the field of textile fabrics, and discloses a polylactic acid fabric and a preparation method thereof. The polylactic acid fabric is prepared by weaving polylactic acid fibers, the polylactic acid fibers are prepared by melt spinning of a polylactic acid material body, and the polylactic acid material body is prepared from the following raw materials in parts by weight: 100-120 parts of polylactic acid resin, 12-20 parts of a heat-resistant moisture absorbent, 6-10 parts of a toughening agent and 0.2-0.4 part of an antioxidant; the heat-resistant moisture absorbent is prepared from lignin fibers, poly (ethylene 2, 5-furandicarboxylate), poly (butylene adipate-co-terephthalate) and a dispersing agent. The preparation method comprises the following steps of melt spinning, rib knitting, heat setting, dyeing and aftertreatment. The polylactic acid fabric prepared by the invention has better heat resistance, moisture absorption and shrink deformation resistance, and is suitable for scenes with higher requirements on heat resistance and moisture absorption, such as underwear or infant clothes.

The invention provides a composite film material which is prepared by the following steps: adding polybutylene terephthalate adipate, a lignin carbohydrate complex and thermoplastic starch into a Haake rheometer according to a certain proportion, carrying out melt blending until the torque is balanced, and carrying out hot-pressing film formation in a press vulcanizer. The film material disclosed by the invention has good mechanical strength and easy-to-degrade performance, relatively high light transmittance and good hydrophobicity, and is completely suitable for the fields of environment-friendly films, mulching films or biodegradable packaging materials and the like. Besides, the preparation method of the film material is simple in process and low in cost, an organic solvent and a plasticizer do not need to be added in the preparation process, a biomass material is used as a filler, and meanwhile the purposes of efficient utilization of biomass resources and environmental friendliness are achieved.

The application relates to a polyethylene glycol-2,5-furandicarboxylic acid terephthalate copolymer foaming material and a preparation method thereof, and the preparation method comprises the following steps: melting polyethylene glycol-2,5-furandicarboxylic acid terephthalate copolymer, and then performing quenching treatment to obtain sheet material; performing annealing treatment on the sheet material, wherein the annealing treatment temperature is (T-25) DEG C to (T+5) DEG C, T is the cold crystallization starting temperature of the polyethylene glycol-2,5-furandicarboxylic acid terephthalate copolymer, and the annealing treatment time is 3 min to 30 min; the sheet material after the annealing treatment is adsorbed and saturated in a foaming gas to obtain a saturated system, and the saturated system is foamed in a foaming medium to obtain the polyethylene glycol-2,5-furandicarboxylic acid terephthalate copolymer foaming material. The polyethylene glycol-2,5-furandicarboxylic acid terephthalate copolymer foaming material obtained by the application has a cell size of 2 mu m to 200 mu m and an expansion ratio of 1.5 times to 15 times, and has a good application prospect.

This application relates to the field of electrochemical technology, specifically to polyester composite films and their preparation methods, composite current collectors and their preparation methods, electrodes and their applications. The polyester composite film of this application comprises: a polyester substrate layer and a first surface layer and a second surface layer respectively disposed on opposite sides of the polyester substrate layer; the polyester substrate layer comprises, by weight, 90 to 99 parts of polyester material and 1 to 10 parts of photo-straining material; the first and second surface layers comprise polyethylene terephthalate polymers; the transmittance of the first surface layer, the second surface layer, and the polyester material is independently 92% to 99%; the photo-straining material comprises one or more of barium titanate ceramics, lead zirconate titanate ceramics, PI / CNTs photosensitive composite materials, PEEK / anthraquinone photosensitive composite materials, MIL-101 chromium metal-organic frameworks, and UiO-66-NH2 / ZnO composite materials. The polyester composite film can easily break under high-destructive external forces such as battery breakdown and battery collision, effectively suppressing thermal runaway.

The present application relates to a kind of polyethylene terephthalate-2,5-furandicarboxylic acid glycol copolyester foamed material and its preparation method, the preparation method includes the following steps: polyethylene terephthalate-2,5-furandicarboxylic acid glycol copolyester material is heat pressed, and the preform of molten state is obtained;The preform of molten state is treated with melt isothermal crystallization and quenching, and sheet material is obtained;Sheet material is treated with foaming, and polyethylene terephthalate-2,5-furandicarboxylic acid glycol copolyester foamed material is obtained.The present application uses melt isothermal crystallization treatment, can improve the melt strength in the foaming process of polyethylene terephthalate-2,5-furandicarboxylic acid glycol copolyester, strengthens its foaming performance, simultaneously can also be realized by strengthening bubble nucleation and controlling bubble growth to adjust the bubble morphology of foamed material, so polyethylene terephthalate-2,5-furandicarboxylic acid glycol copolyester foamed material with uniform bubble size and controllable foaming ratio can be obtained.

The invention discloses a degradable plastic master batch as well as preparation and application thereof. The degradable plastic master batch is prepared from the following raw materials in parts by mass: 40 to 60 parts of polylactic acid, 30 to 50 parts of poly (butylene terephthalate)-adipate, 10 to 20 parts of 9, 9-di-n-octylfluorene copolymer, 3 to 9 parts of degradation agent and 1 to 5 parts of lubricant. The 9, 9-di-n-octylfluorene copolymer is added into the plastic master batch taking polylactic acid and poly (butylene adipate-co-terephthalate) as matrixes, and the 9, 9-di-n-octylfluorene copolymer effectively improves the impact strength and tensile strength of the plastic master batch; in addition, by adding the degradation agent, the 9, 9-di-n-octylfluorene copolymer can be effectively degraded, so that the degradable plastic master batch with high impact strength and tensile strength is obtained.

The invention relates to a biodegradable mulching film raw material composition, a biodegradable mulching film and a preparation method of the biodegradable mulching film. The invention relates to a raw material composition for a biodegradable mulching film. Comprising the following components in parts by weight: 50 to 90 parts of poly (butylene terephthalate)-adipate, 5 to 20 parts of composite powder, 0.2 to 1 part of a coupling agent, 0.2 to 1 part of a lubricant, 5 to 30 parts of polypropylene carbonate and a modifier, 0.1 to 1 part of a hydrolysis time regulator, 0.4 to 1 part of a hindered amine light stabilizer, 0.2 to 0.5 part of an antioxidant and 0.2 to 0.8 part of a compatilizer. Wherein the composite powder comprises calcium carbonate and talcum powder; the crystal diameter of the calcium carbonate is 2-5 nanometers, and the crystal is needle-shaped or fibrous; the crystal size of the talcum powder is 2-5 nanometers, the crystal is in a sheet shape or a scale shape, and the length-diameter ratio of the crystal is larger than or equal to 20: 1. The biodegradable mulching film formed by the raw material composition has low water vapor permeability, and the biodegradation time and the degradation rate can be regulated and controlled.

The present application relates to polybutylene terephthalate (PBT) material toothbrush filament technical field, specifically relates to a kind of multifilament version anti-lodging PBT monofilament and preparation method thereof;The preparation method is realized with the basic concept of multifilament to realize the basic form of monofilament, in the drawing process, every three monofilaments are gathered into a multifilament, in the subsequent water cooling, oiling etc. Process path, with the mode of multifilament, drafting, winding forming are completed.In the condition that monofilament specification remains unchanged, corresponding design is carried out to production process, and the quality indexes such as breaking strength, breaking strength variation coefficient, breaking elongation, breaking elongation variation coefficient of monofilament are controlled.In the realization equipment efficiency is improved three times target, product quality is upgraded, and the anti-lodging performance of PBT monofilament is improved.

The present invention relates to novel carbodiimides, to a process for their production, and to the use of the novel carbodiimides in ester-based polyols, in polyethylene terephthalate (PET), in polybutylene terephthalate (PBT), in polytrimethylene terephthalate (PTT), in copolyesters, in thermoplastic polyester elastomers (TPE E), in ethylene vinyl acetate (EVA), in polylactic acid (PLA) and / or in PLA derivatives, in polybutylene adipate terephthalate (PBAT), in polybutylene succinate (PBS), in polyhydroxyalkanoates (PHA), in blends, in triglycerides, in thermoplastic polyurethanes, in polyurethane elastomers, in PU adhesives, in PU casting resins, for PU coatings or in PU foams as stabilizers.

The invention provides a metal salt modified thermoplastic starch filled PBAT-based composite material as well as a preparation method and application thereof. The plastic film is prepared from the following components in parts by weight: 25-35 parts of thermoplastic starch, 60-70 parts of poly (butylene terephthalate)-adipate, 1-10 parts of polylactic acid, 0.1-1 part of an antioxidant, 0.1-1 part of an anti-hydrolysis agent and 0.1-1 part of a dispersing agent. 0.1-1 part by weight of an anti-blocking agent and the like are added into a high-speed mixer step by step according to a particle-liquid-powder sequence to be mixed; and extruding through a double-screw extruder, air-cooling and pelletizing to obtain the PBAT-based composite material. The metal ions and the starch hydroxyl form a coordination effect, so that the mechanical property of the PBAT-based composite material is remarkably improved, and the cost is reduced while the mechanical property of a pure PBAT material is reserved. In addition, the waistcoat type non-food contact biodegradable shopping bag made of the PBAT-based composite material can bear the weight of 5 kg, and the degradation performance meets the requirements of GB / T 38082-2019.

Depolymerization of polyalkylene terephthalate resin using Alcosilis, providing a superior depolymerization method. [Solution] The method for depolymerizing a polyalkylene terephthalate resin according to the present disclosure is a method for depolymerizing a polyalkylene terephthalate resin by alcoholization of the polyalkylene terephthalate resin, wherein the polyalkylene terephthalate resin includes a polybutylene terephthalate resin, and the alcohol used for alcoholization contains tetrahydrofuran in a proportion of more than 0 ppm by mass and 100,000 ppm or less by mass.

A second aspect relates to a polyalkylene terephthalate polymer obtained or obtainable from the method of the first aspect. A third aspect relates to the use of the polyalkylene terephthalate polymer of the second aspect for textile, fiber, packaging, plastic, automotive, and electronic applications. A fourth aspect relates to a method for producing products, comprising (I) providing a polyalkylene terephthalate polymer of the second aspect, and (II) producing textiles, fibers, packaging, plastics, automotive parts, and electronic parts from the polyalkylene terephthalate polymer provided in (I). A fifth aspect relates to a method comprising a further step of converting a again obtained polyalkylene terephthalate polymer obtained by the method of the first aspect to obtain a polymer product. A sixth aspect relates to a method comprising a further step of converting a residue obtained or obtainable from the method of the first aspect, and / or converting an elastic fiber residue obtained or obtainable from the method of the first aspect to obtain one or more monomers, polymers, or polymer products.

The invention relates to preparation of a medium-entropy alloy catalyst and a method for converting waste poly (butylene adipate terephthalate) into succinic acid by electro-catalysis of the medium-entropy alloy catalyst. The method comprises the following steps: putting waste PBAT (poly (butylene adipate terephthalate)) plastic into an alkaline medium for depolymerization; the depolymerization solution is used as an electrolyte, a Mn-Cr-Mo / NF entropy alloy catalyst loaded on foamed nickel (NF) is used as an anode for continuous electrolysis, and 1, 4-butanediol is oxidized and upgraded into succinic acid at the anode. The catalyst has high activity, high selectivity and high stability in the reaction process of converting poly (butylene adipate terephthalate) (PBAT) into succinic acid (SA) through electro-catalysis. The invention provides a new way for upgrading and converting waste PBAT into high-value chemicals.

The invention relates to the technical field of biodegradable materials, in particular to a high-transparency ultralow-haze PBAT-based flexible film and a preparation method and application thereof, and the high-transparency ultralow-haze PBAT-based flexible film is composed of poly (butylene adipate-co-butylene terephthalate), poly (butylene succinate-co-butylene terephthalate), an antioxidant, an anti-hydrolysis agent, an anti-blocking agent and a dispersing agent in parts by weight. The polyethylene terephthalate-butylene adipate is used as a main component, the polyethylene terephthalate-butylene adipate can be added as required, and a small amount of other assistants are added to guarantee the performance of the film. According to the invention, PBAT and PBST are blended to improve the optical performance of the film, casting cooling inhibits the formation of a large crystal region, and the transparency is synergistically increased; the problems of low transparency and high haze of the PBAT-based film are solved, the use requirement of the packaging field on the film material is met, and the application of the PBAT material is further widened.

A paper comprising polymeric fibers and a binder, wherein the polymeric fibers comprise first fibers and second fibers, the first fibers comprising an aramid copolymer having a structure derived from the reaction of para-oriented aromatic diamine monomer and benzimidazole monomer with a para-oriented aromatic diacid monomer, the second fibers comprising poly(para-phenylene terephthalate) homopolymer, and the binder comprising a third polymer that is either an aramid homopolymer or aramid copolymer; the paper having an ultimate tensile strength of 21 N-m / g or greater and average specific modulus of 4950 Pa-m3 / g or greater.

The application discloses a preparation method of a bifunctional modified calcium carbonate with capacity and enhancement effects, and belongs to the technical field of biodegradable materials. Firstly, 4-aminomethyl benzoic acid solution is prepared and sprayed on the surface of pretreated calcium carbonate, and high-speed heating and mixing are conducted to obtain pretreated calcium carbonate. Secondly, folic acid is reacted in a solvent to obtain an active ester solution; the active ester solution is slowly added and dropped in a high-speed mixer while stirring to conduct a reaction, and modified calcium carbonate is obtained after drying. Finally, polybutylene adipate terephthalate and the modified calcium carbonate are subjected to high-speed mixing to obtain polybutylene adipate terephthalate / folic acid-4-aminomethyl benzoic acid-calcium carbonate mixture; the mixture is melt-extruded by using a double-screw extruder to obtain bifunctional modified calcium carbonate, the tensile strength of which is increased to 30.36 Mpa, and the elongation at break is increased to 698%; the contact angle of the prepared folic acid-4-aminomethyl benzoic acid-calcium carbonate is increased to 137.5 degrees, and the activation rate is increased to 99.10%.

The invention discloses a polyester film, a preparation method and a polyester film veneer furniture board. The polyester film comprises a hot-melt back adhesive layer and a polyester layer which are attached to each other, the polyester layer is prepared from the following raw materials in percentage by mass: 60 to 80 percent of poly (1, 4-cyclohexanedimethanol terephthalate), 15 to 25 percent of polyphenylene sulfide, 2 to 5 percent of maleic anhydride-styrene-glycidyl methacrylate copolymer, 1 to 3 percent of filler and 0.1 to 2 percent of additive. By adopting the polyester film with the PCT and PPS composite resin as the core, the problem that the deep embossing effect cannot be achieved on the surface of a current home building material film facing material is effectively solved.

The invention relates to the technical field of packaging materials, and discloses a high-barrier long-acting antibacterial composite environment-friendly packaging material and a preparation method thereof, and the high-barrier long-acting antibacterial composite environment-friendly packaging material is formed by compounding an inner-layer film, a middle-layer film and a surface-layer film. The inner-layer film is prepared from low-density polyethylene, metallocene linear low-density polyethylene and the like; the middle-layer film is a reactive compatibilization layer and comprises an ethylene-vinyl alcohol copolymer, polybutylene terephthalate adipate and a styrene glycidyl methacrylate copolymer, and compatibility and toughness are improved through an in-situ reaction; a surface film is a functional layer, phytic acid and bifunctional modified montmorillonite are utilized to construct a hybrid network, and the sedum sarmentosum extract and the chitosan quaternary ammonium salt are anchored. By adopting a step-by-step film preparation and hot-pressing compounding process, the obtained material has the characteristics of high barrier, high strength and long-acting bacteriostasis, and the glue-free compounding process is environment-friendly and safe.

The present disclosure relates to a package, such as a food package, comprising a first part and a second part, the second part being sealed to the first part at a first part circumferential edge and in a circumferential attachment zone to form a sealed inner compartment, the attachment zone having a first peelable zone and a second non-peelable zone, the first part and the second part include polymeric materials, the package is a mono polyester material package, 95 wt % or more of the package is polyester material. The second part includes a laminate having an oriented Polyethylene Terephtalate (OPET) material layer and an amorphous Polyethylene Terephtalate (APET) layer, the amorphous Polyethylene Terephtalate layer facing the first part.

In a first aspect, the present invention relates to a process for recovering a polyalkylene terephthalate-based polymer from a colored polymer material comprising a polyalkylene terephthalate-based polymer. A second aspect relates to a colorant-depleted polyalkylene terephthalate-based polymer obtained or obtainable by the process of the first aspect. A third aspect relates to: the second aspect of the use of a colorant-poor polyalkylene terephthalate-based polymer for textile applications, fiber applications, packaging applications or plastic applications, preferably for the production of food packages, beverage packages, garments and footwear; and a method for preparing a textile from a polyalkylene terephthalate-based polymer of a second aspect. A fourth aspect of the invention relates to a process comprising converting a reobtained polyalkylene terephthalate-based polymer, and a fifth aspect relates to a process comprising converting a residue.