186results about "Monocomponent copolyesters artificial filament" patented technology

Provided is a liquid crystalline polyester fiber capable of achieving improved weatherability without kneading a UV absorber into the fiber or attaching a weatherable UV absorber after fiber spinning. The liquid crystalline polyester is a fiber that consists essentially only of a liquid crystalline polyester, in which the amount of UV absorber used is 5 mass % or less, and the strength retention in the weather fastness test with xenon arc lamp light in accordance with JIS L 0891 is 60% or more.

The present invention discloses an aliphatic-aromatic polyester composition, polyester fiber, and its preparation and use. The aliphatic-aromatic polyester composition of the present invention comprises: i) an aliphatic-aromatic polyester based on an aliphatic dicarboxylic acid, an aromatic dicarboxylic acid, and an aliphatic dihydroxy compound; and ii) a titanium element content of 55 to 88 ppm, based on the weight of the aliphatic-aromatic polyester composition. The aliphatic-aromatic polyester composition has an acid value of 0.84 mg KOH / g or less according to standard DIN EN 12634-1998. The aliphatic-aromatic polyester composition of the present invention not only has a low yellowness index and good colorability, but also effectively improves hydrolysis resistance, making it suitable for wide use in the field of polyester fibers.

The invention relates to the technical field of polymer dye synthesis, and discloses a monomer for a blue polyester fiber and a preparation method thereof.According to the monomer for the blue polyester fiber, 1, 4-arylamino substituted anthraquinone serves as a color development mother nucleus, a benzoate group is introduced to aryl of the 1, 4-arylamino substituted anthraquinone mother nucleus, and the monomer for the blue polyester fiber is obtained; the benzoate group is connected with the chromophoric parent nucleus through a carbon-carbon bond; the molecular terminal of the monomer for the blue polyester fiber is connected with an exposed ester group through an aryl group, and the exposed ester group is used for transesterification with dihydric alcohol under the melt polycondensation condition of polyester. The novel monomer for the blue polyester fiber, provided by the invention, has excellent color development performance and thermal stability, can be directly used for in-situ synthesis of blue polyester and can be directly used for melt spinning, and the color fastness and coloring uniformity of a product are improved; meanwhile, the monomer for the blue polyester fiber, provided by the invention, is simple in preparation method, low in cost and easy for large-scale production.

The method for producing recycled polyethylene terephthalate yarn according to the present invention includes the steps of melting recycled polyethylene terephthalate chips and spinning them through a spinning nozzle to produce a spun yarn, and multi-stage drawing and winding the spun yarn using equipment with five or more stages of drawing godet rollers, wherein the recycled polyethylene terephthalate chips contain 1.0 mol% or less of isophthalic acid, the draw ratio is 1.5 to 2.45, and the speed of the fourth godet roller among the five or more stages of drawing godet rollers is 5500 m / min to 7000 m / min. The recycled polyethylene terephthalate yarn produced by this method has a strength of 8.5 g / d or more and a dimensional stability ES of 11.0% or less.

This invention relates to the field of yarn technology, specifically disclosing a superconducting wet-drying yarn, its preparation method, and its application. The yarn is prepared by blending high-shrinkage polyester fibers and cotton fibers. The preparation of the high-shrinkage polyester fibers includes two parts: raw material synthesis and fiber forming. Terephthalic acid and ethylene glycol are used as raw materials. After the esterification reaction, polyethylene glycol and aromatic dicarboxylic acid ester sulfonate are added, resulting in high-shrinkage polyester chips. These chips are then used as raw materials for spinning to obtain high-shrinkage polyester fibers. Through the two-component design of the yarn, a micro-circulation diffusion system with superconducting moisture absorption and sweat-wicking effect is formed, effectively improving the hygroscopicity of the polyester fibers. Even after multiple washes, it still possesses excellent superconducting wet-drying properties, long-lasting efficacy, and good wash resistance, without causing uneven dyeing or unidirectional moisture wicking problems.

A thermoplastic elastomer-based multifilament yarn and a method of making a thermoplastic elastomer-based multifilament yarn are disclosed. The multifilament yarn includes a first filament at least partially adhered to a second filament. The first filament and the second filament are each formed from a thermoplastic elastomer composition comprising a thermoplastic elastomer exhibiting a flexural modulus of about 300 MPa or less as determined at a temperature of about 23 DEG C according to ISO 178: 2019. The yarn has a linear density of from about 1 to about 500 deniers per filament, and exhibits an elongation at break of about 300% or greater as determined at a temperature of about 23 DEG C according to ASTM D2653-07 (2018).

A method of making a thermoplastic copolyester elastomer-based fiber is disclosed. The method comprises: providing a thermoplastic copolyester elastomer having a number average molecular weight of greater than 35,000 g / mol; and spinning the thermoplastic copolyester elastomer to provide a fiber comprising a spun thermoplastic copolyester elastomer, wherein the spun thermoplastic copolyester elastomer has a number average molecular weight that is 98% or less to 50% or more the number average molecular weight of the thermoplastic copolyester elastomer. A thermoplastic copolyester elastomer-based fiber made according to the aforementioned method and a fabric comprising the aforementioned thermoplastic copolyester elastomer-based fiber are also disclosed.

The application discloses an energy-saving recycling process for polyester-containing waste textiles, and specifically comprises the following steps: step one, pretreatment of the waste textiles: the waste textiles are first cleaned, then put into an automatic feeding mechanism, and cut by a shredding assembly into a collecting box, and flattened by a compacting assembly; step two, chemical dissolution; step three, the decomposed substances are sequentially separated, purified, and re-polymerized to obtain filaments, which are finally stretched and processed to obtain regenerated polyester fibers; the application relates to the technical field of waste recycling. The energy-saving recycling process for polyester-containing waste textiles is provided with a shredding assembly, so that the knife barrels can drive the first cutter and the second cutter to alternately cut the waste textiles while rotating; the first cutters on the two knife barrels cooperate to perform primary cutting and crushing, and the second cutters cooperate to perform secondary cutting and crushing, so that the entangling effect can be achieved.

This invention discloses a soft pad material for hair transplant fixation and reinforcement, and its application in plush toys. It belongs to the technical field of soft pad materials. The soft pad material provided by this invention includes a polyester fiber mesh and a soft material wrapped around the surface of the polyester fiber mesh. The soft material includes at least one of PVC, TPU, TPE, rubber, silicone, and their composites. The polyester fiber mesh is obtained by polymerizing a diacid monomer and an ethylene glycol monomer in a molar ratio of 1:(1.2-1.5). The diacid monomer, by molar part, includes 30-50 parts of semi-aromatic diacid, 40-60 parts of terephthalic acid, and 5-10 parts of 3-3'-bipyridine-5.5'-dicarboxylic acid. The soft pad provided by this invention achieves efficient reinforcement of the soft material through the polyester fiber mesh, balancing the material's flexibility and mechanical properties, enabling the soft pad to meet high pull-out force while also possessing excellent puncture resistance.

A resin composition for monofilaments contains a poly(3-hydroxyalkanoate)-based resin component. The resin composition has a melting point peak temperature of 140° C. or higher and a crystal melting enthalpy of 65 J / g or less as calculated from all melting peaks in differential scanning calorimetry. The monofilament containing the resin composition has high strength and elongation. A method for producing the monofilament containing the resin composition contains, in the stated order, (i) discharging the resin composition in a molten state from a spinning nozzle, and then cooling thereby forming a raw yarn and (ii) stretching the raw yarn in at least one direction.

This invention provides a novel false-twist multifilament yarn that has excellent yarn properties such as strength and elongation, and is sufficiently crimped by false-twist processing. When used in clothing or interior goods, it does not naturally disintegrate and can be used under normal conditions. Furthermore, when recycled after use, it can be melted at low temperatures into a resinous substance and molded into a shape that allows it to be pelletized again. [Solution] A false-twist multifilament yarn composed of single fibers formed from a copolymer polyester containing terephthalic acid as an acid component and ethylene glycol and 1,4-butanediol as glycol components, wherein the false-twist multifilament yarn has a breaking strength of 2.0 cN / dtex or more, an elongation at break of 45% or less, a crimping rate of 25-75%, and an elasticity recovery rate of 20-55%.

The invention belongs to the field of electrostatic spinning, and relates to a nanofiber with an adjustable biodegradation period, a preparation method of the nanofiber, a non-woven fabric and application of the non-woven fabric. The nanofiber is PBST fiber, and the average diameter of the PBST fiber is not more than 800 nm, preferably 50-600 nm; based on the total weight of the PBST, the content of a butylene succinate (BS) chain segment in the PBST is 40 to 90 weight percent, preferably 50 to 80 weight percent. The PBST nanofiber provided by the invention is simple in preparation method, good in continuity, safe, environment-friendly and suitable for industrial production; the obtained PBST nanofiber has biodegradability and no solvent residue, the biodegradation period is 40-80 days, and the PBST nanofiber can be used for products such as degradable packages, mulching films, shopping bags and medical sanitary materials.

The invention relates to the technical field of biochemical engineering, and particularly discloses a polyester fiber membrane and a preparation method thereof. The polyester fiber membrane is prepared from a copolymer shown in the formula I through electrostatic spinning. The prepared polyester fiber membrane is uniform in fiber diameter, good in gas permeability and high in relative cell survival rate, and has wide application prospects in the field of biomedicine. I

The present invention provides a method of producing a melt-blown nonwoven fabric, the method making it possible to increase the stretchability of a melt-blown nonwoven fabric formed from fibers containing a poly(3-hydroxyalkanoate)-based resin, as well as to suppress thermal contraction of the melt-blown nonwoven fabric. The present invention is a method of producing a melt-blown nonwoven fabric, the method including obtaining a second melt-blown nonwoven fabric by heating a first melt-blown nonwoven fabric. The first melt-blown nonwoven fabric is formed from a resin composition containing a poly(3-hydroxyalkanoate)-based resin. The step of obtaining the second melt-blown nonwoven fabric includes heating the first melt-blown nonwoven fabric within a temperature range higher than or equal to a temperature that is lower by 10°C than an endothermic start temperature of the resin composition in differential scanning calorimetry, the temperature range being lower than or equal to a temperature that is lower by 10°C than a melting point of the resin composition.

Provided is a liquid crystal polyester fiber in which gas generation from the liquid crystal polyester fiber can be suppressed when being heated. The liquid crystal polyester fiber has a total amount of carboxy end groups (total CEG amount) of 5.0 mEq / kg or less and a tenacity of 18 cN / dtex or higher. For example, the liquid crystal polyester fiber may have an initial elastic modulus variation of 3.0% or less. The liquid crystal polyester fiber may contain carboxy end groups as carboxyphenyl terminus at a CEG amount of 4.0 mEq / kg or less.

This disclosure provides a polyether-ester elastomer with a high stain hardening ability, wherein the thermoplastic polyether-ester elastomer contains polyester hard segment, polyether soft segment and at least one inorganic compound. The inorganic compound is selected from the group consisting of silicon dioxide, titanium dioxide, zinc oxide, aluminum oxide, aluminum silicate, zirconium oxide, potassium titanate and derivatives thereof. This disclosure also provides a polyether-ester elastic fiber which is characterized by a stress-strain curve with a specific profile. This disclosure also provides a process for preparing the polyether-ester elastomer, a process for preparing the polyether-ester elastomer fiber, use of the polyether-ester elastomer or polyether-ester elastomer fiber, and a polyether-ester elastic material comprising the polyether-ester elastomer.

The application provides a forming process for directly spinning fibers of 6000D or more, and belongs to the technical field of high-performance fibers. Polyester chips are used as raw materials, the polyester chips are added into a screw extruder for melt spinning, a plurality of spinnerets corresponding to the screw extruder respectively extrude protofilaments, the protofilaments enter a drafting and heat setting process and winding to obtain fiber products of 6000D or more. The application can realize direct forming of fibers of 6000D or more, such as 6000D, 7000D, 8000D and 9000D, without doubling, and has the advantages of short process route, short cycle, low energy consumption, low cost, high breaking strength and the like.

The invention belongs to the technical field of textiles, and discloses a high-elasticity polyester fabric and a preparation method thereof. The fabric is formed by 100% modified PET, and a molecular chain of the fabric adopts a three-arm star-linear topological structure which takes trimethylolpropane as a core and contains a PET rigid block and a PTMG flexible block; the preparation method comprises the steps of prepolymer synthesis, melt polycondensation, solid-phase tackifying, melt spinning, false twist deformation and heat setting, and precise construction of a microstructure is achieved by regulating and controlling the density of a catalyst system and topological nodes. Through the innovative design of a molecular topological structure, a pure polyester fabric system with high elasticity, high weather resistance, high strength and complete recoverability is successfully constructed, so that the problems of environmental stability and recovery of the existing spandex-based elastic fabric are solved; and a brand new technical path is provided for sustainable development of high-performance synthetic fibers.

The invention belongs to the technical field of synthetic fiber modification, and discloses a polyester fiber suitable for non-aqueous medium dyeing and a preparation method thereof.The preparation method comprises the steps that firstly, terephthalic acid and ethylene glycol serve as raw materials, a composite bimetallic catalyst and an esterification accelerant containing siloxane groups are added, and pulping is conducted to form slurry; continuously feeding the slurry into an esterification reaction kettle for esterification reaction, and performing condensation polymerization on an esterification product to obtain a polyester melt; finally, sequentially carrying out strip casting, pelletizing and solid-phase tackifying on the polyester melt to obtain high-viscosity polyester chips, and carrying out melt spinning to obtain the polyester fiber suitable for non-aqueous medium dyeing. When the esterification product is sent out, the esterification product accounting for 40-60% of the effective volume always exists in the esterification reaction kettle; the content of oligomer in the product is lower than 0.6 wt%, and the proportion of cyclic trimer in the oligomer exceeds 60%. The method provided by the invention effectively solves the problems of color spots and uneven dyeing caused by oligomer precipitation; the prepared product is excellent in dyeing performance.

An object of the present invention is to provide a method for producing a polymeric molded product, which enables expansion of a temperature range that can be used for partial melting. The method for producing a polymeric molded product, comprises subjecting a crystalline polyhydroxyalkanoate to a heating treatment at a temperature equal to or higher than a glass transition temperature; and melt-molding a polyhydroxyalkanoate yielded by the heating treatment, which comprises lamellar crystals that are different in lamellar thickness, in a temperature range where some of the lamellar crystals undergo melting and flowing, and the other balance lamellar crystals remain unmelted.

To provide biodegradable polyester fibers being strong enough to sufficiently endure when used normally, and a manufacturing method of the biodegradable polyester fibers, the method enabling continuous and stable manufacturing, and the fibers not conglutinating with each other, having little variation in fiber diameter, and being strong enough to sufficiently endure when used normally.SOLUTION: Biodegradable polyester fibers have fineness of 200 dtex or less, strength of 1.5 cN / dtex or more, and are made from PHA. A manufacturing method comprises: a first step of melting a resin material containing PHA and discharging the resin in a fibrous state from a spinneret b; a second step of, after air-cooling fibers c made from the discharged resin material, keeping the fibers at 140°C or higher and 180°C or lower; a third step of winding up undrawn fibers obtained in the second step; a fourth step of drawing the wound-up undrawn fibers at a drawing rate of 100 m / min or more and 600 m / min or less and with a draw magnification ratio of 1.5 times or more and 3.0 times or less; and a fifth step of subjecting the drawn fibers to stress relaxation at 0.80 times or more and 0.99 times or less.SELECTED DRAWING: Figure 1

The application belongs to the field of polyester base cloth materials, and provides a high tensile strength polyester base cloth and a preparation method thereof, and constructs a modified polyester which can maintain excellent mechanical properties under high stress conditions. First, polyethylene glycol monomethyl ether is used to react with maleic anhydride to introduce flexible polyether chain segments and unsaturated double bond structures, and then free radical grafting of acrylic acid and ring-opening reaction of epichlorohydrin are used to introduce functional groups, so that the flexible chain segments have reactivity with polyester chains and other components, thereby enhancing the intermolecular compatibility and binding force in subsequent polymerization. In the preparation process of the polyester matrix, modified liquid crystal polyester and modified poly-p-phenylene benzobisoxazole are added to improve the tensile strength of the material through the rigid molecular chain structure thereof, and meanwhile, the flexible chain segments of the modified polyethylene glycol monomethyl ether and polytetrahydrofuran ether glycol effectively disperse internal stress, further improving the overall mechanical properties and structural stability of the material.

The application discloses a kind of full biodegradable straw-plastic composite material and preparation method thereof.Full biodegradable straw-plastic composite material is composed of the following components by mass percentage: straw fiber 80-95% carbon dioxide-based polyester-polycarbonate staple fiber (PPC-P) 5-20%.The application finds through a large number of experiments that because there is physical cross between straw fiber and PPC-P fiber, so processing does not need to add compatilizer and coupling agent, and the use amount of PPC-P fiber can be greatly reduced, only 5%-20% of the use amount, thereby greatly reducing the cost of wood-plastic composite material.The resin used in the application is degradable carbon dioxide-based-polycarbonate, so that the composite material has full biodegradability.Carbon dioxide-based-polycarbonate is prepared from carbon dioxide, and the application reduces carbon dioxide emission.

Provided is a liquid crystal polyester chip-shaped article containing a recovered liquid crystal polyester molded body as at least part of a raw material. This liquid crystal polyester chip-shaped article is a chip-shaped article containing a recovered liquid crystal polyester molded body as a raw material, and having a bulk density of 0.15-1.20 g / mL, wherein the average value of the maximum length of the chip-shaped article is 3-30 mm.

A method for producing biodegradable fibers containing inorganic filler particles by wet spinning, prepared by dissolving a mixture of inorganic filler particles and biodegradable resin in a weight ratio of 50-80:50-20 in a good solvent and stirring the solution is filled into a syringe of a wet spinning machine and extruded downward from the discharge port of the injection needle into a collector container. The collector vessel is filled with a first poor solvent having a dissolution parameter value with a small deviation from the good solvent and a second poor solvent having a specific gravity greater than the first poor solvent and a dissolution parameter value with a large deviation from the good solvent, in two layers, top and bottom. The spinning solution extruded from the syringe outlet enters the first poor solvent in the collector container by its own weight in fibrous form, and then continuously enters the second poor solvent filled below the first poor solvent. The fibrous spinning solution injected into the second poor solvent becomes continuous long fibers and is deposited floating on the bottom of the collector container to form a cotton shape.

This invention relates to a polyester with antibacterial and antiviral functions, its preparation method, and its application. The polyester with antibacterial and antiviral functions is a cationic polymer guanidine salt-supported antibacterial and antiviral polyester. The preparation method includes the following steps: modifying the cationic polymer guanidine salt with a compound containing multiple functional groups to obtain a reactive antibacterial and antiviral adjuvant; during the polymerization of the polyester, adding the reactive antibacterial and antiviral adjuvant, terephthalic acid, diol, and catalyst in a single batch to a polyester reactor to obtain an antibacterial and antiviral random copolyester; or, copolymerizing the reactive antibacterial and antiviral adjuvant with diethyl terephthalate (BHET) to obtain an antibacterial and antiviral copolyester. Compared with the prior art, the polyester obtained by this invention exhibits no dissolution of the antibacterial and antiviral components, uniform dispersion, excellent durability, and good color value in the resulting fiber product.

[Problem] A flexible and biodegradable filament having excellent printability is provided. [Solution] A biodegradable filament for 3D printer comprising: an amorphous biodegradable polyester; and a water-soluble polymer different from the biodegradable polyester, wherein the water-soluble polymer has a melting point of 30°C or more and 220°C or less.

A copolymer composition is disclosed with advantages for textile fibers, yarns, blended yarns, fabrics, and garments. The composition includes polyester copolymer, between about 4.5 and 5.5 percent adipic acid based on the amount of copolymer, between about 630 and 770 parts per million (ppm) of pentaerythritol based on the amount of copolymer, and between about 3.4 and 4.2 percent polyethylene glycol based on the amount of copolymer.