254results about "Monocomponent copolyesters artificial filament" patented technology

The invention provides a superfine denier profiled polyester staple fiber and a preparation method thereof.The preparation method includes the steps of raw material pretreatment, melt spinning, nascent filament treatment, heat setting and curling, oiling and cutting off and the like, polyester chips have high intrinsic viscosity and melting point, and under the action of six-zone temperature control, a high-hole-density spinneret plate and a high draft multiple, the polyester chips are subjected to melt spinning, so that the polyester chips are prepared into the superfine denier profiled polyester staple fiber. The superfine, special-shaped and hollow polyester staple fibers are prepared. The obtained polyester staple fiber has good breaking strength, rebound resilience and a low-defect structure, the bulkiness, flexibility and structural consistency of the fiber are remarkably improved, the environment and process limitation of a traditional sea-island fiber alkali stripping method is broken through, and the polyester staple fiber is suitable for the fields of high-end filling, plush imitation, non-woven materials and the like.

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 field of polyester fiber production, and discloses modified copolyester, a preparation method thereof and a polyester fiber product. The modified copolyester contains a structural unit A as shown in a formula (I), a structural unit B as shown in a formula (II) and a structural unit C as shown in a formula (III), wherein R1, R2, R3 and R4 are each independently a C1-C10 alkyl group, and m is a positive integer greater than 3; rI, RII, and RIII are each independently hydrogen or a C1-C10 alkyl group. The preparation method comprises the following step: in the presence of a catalyst, carrying out contact reaction on a binary acid monomer, a dihydric alcohol monomer, a component a with a structure as shown in a formula (I), a component b with a structure as shown in a formula (II) and a component c with a structure as shown in a formula (III). The modified copolyester fiber material has good softness and crease resistance, the wearability of a polyester fiber product can be effectively improved, and the diversity and functionality of the polyester material are improved. # imgabs0 #

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.

An object of the present invention is to solve a problem that when products such as films, molded products, or fibers are continuously produced from a copolymerized polyester resin copolymerized with diethylene glycol and sodium sulfoisophthalate, die contamination and adhesion of foreign matter to the products occur and a problem that during recycling of a copolymerized polyester resin copolymerized with diethylene glycol and sodium sulfoisophthalate for improving transparency and moldability, the resin is colored or the molecular weight of the resin is reduced. A copolymerized polyester resin containing terephthalic acid as a main dicarboxylic acid component and ethylene glycol as a main glycol component, wherein when a total amount of dicarboxylic acid components in all polyester resin components is taken as 100 mol%, a ratio of the terephthalic acid component to all the dicarboxylic acid components is 79.95 to 94.95 mol%, a ratio of the aliphatic acid having 6 to 40 carbon atoms to all the dicarboxylic acid components is 5 to 20 mol%, and a ratio of sodium sulfoisophthalate to all the dicarboxylic acid components is 0.05 to 10 mol%, when a total amount of glycol components is taken as 100 mol%, a ratio of diethylene glycol to all glycol components is 1 to 22 mol%, a content of a free cyclic dimer consisting of sodium sulfoisophthalate and ethylene glycol is 30 ppm or less, and a content of a free cyclic dimer consisting of terephthalic acid, sodium sulfoisophthalate, ethylene glycol and diethylene glycol is 40 ppm or less.

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.

The invention discloses a high-liquid-holdup spunlace mask base material and a preparation method thereof, and belongs to the technical field of non-woven base cloth materials. The high-liquid-holdup spunlace mask base material is used for solving the technical problem that in the prior art, the moisture absorption performance, the liquid holdup performance and the size stability of a mask base material need to be further improved. The high-liquid-holdup spunlace mask base material is prepared from, by weight, 2-3 parts of moisture absorption modified polyester fibers, 6-8 parts of gelatin modified cotton fibers and 7-9 parts of modified polylactic acid fibers. The moisture absorption modified polyester fibers, the gelatin modified cotton fibers and the modified polylactic acid fibers are promoted to be entangled and fixed through spunlace curing to prepare the mask base material, so that the size stability and the biodegradability of the mask base material are effectively improved, and the moisture absorption and moisturizing performance of the mask base material is also improved.

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.

The invention relates to a fabric with moisture absorption, sweat releasing and antistatic functions and a preparation method thereof, and belongs to the technical field of textiles. According to the invention, terephthalic acid, ethylene glycol, a catalyst and a self-made antistatic monomer are used as raw materials to prepare the fabric with moisture absorption, sweat releasing and antistatic functions, PET is modified through ester exchange, and the synergistic effect of ether bonds and quaternary ammonium salt ions is introduced into a side chain, so that the moisture absorption and antistatic properties are improved; ether bonds and water molecules can form a hydrogen bond network to lock free water molecules, quaternary ammonium salt ions can provide carriers for ionization, qualitative conduction is carried out under the action of an electric field, so that static accumulation is eliminated, a lasting antistatic effect is achieved, and the material has moisture absorption and antistatic properties; in addition, ether bonds and quaternary ammonium salt ions are stably connected to a PET molecular side chain through covalent bonds, and the modified fabric with the moisture absorption, sweat releasing and antistatic functions can still keep efficient activity after being washed for multiple times.

Elastomer-based thread or ribbon and article incorporating such a thread or ribbon Extruded filiform element, in particular an oblong or elongated thread or ribbon, the material of which is made at least in part of an elastomer, in particular constituting from 60% to 100% by weight of the element, in particular constituting from 60% to 95% by weight of the element, in particular a thermoplastic elastomer TPE, is characterized in that the of the element at an elongation of 300% is greater than 4 times the at an elongation of 100%, in particular is between 5 and 10 times the at an elongation of 100%, more in particular between 5 and 8 times the at an elongation of 100%. Figure for abstract: Fig.3

Provided is a liquid crystal polyester fiber that has excellent tensile strength and compressive strength and has excellent disk fatigue performance. The liquid crystal polyester fiber has a melting point of 335 °C to 360 °C (exclusive of 360 °C), as measured by a differential scanning calorimeter under a nitrogen atmosphere at a heating rate of 10 °C / min, and a crystallinity of 45-60%. The total number of voids and unmelted substances, with a major diameter of at least 5 μm, contained per 5 cm of single yarn, is at most 3. For example, the liquid crystal polyester fiber may have an orthorhombic crystallinity of at least 20% in a crystalline component.

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.

Provided is a melt anisotropic aromatic polyester fiber having excellent creep characteristics. The degree of orthorhombic crystallization of the crystal component of the melt anisotropic aromatic polyester fiber is 15.0% or more. For example, the melt anisotropic aromatic polyester fiber may have a density of 1.4080 g / cm3 or more as determined by a density gradient tube. The melt anisotropic aromatic polyester fiber may contain a melt anisotropic aromatic polyester having a structural unit derived from 4-hydroxybenzoic acid in an amount of 50 mol% or more.

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.

The present invention relates to a polyester fiber, a preparation method thereof and a molded article prepared therefrom. The polyester fiber comprises a diol moiety derived from isosorbide in a specific amount and is formed into a polyester resin having a specific oligomer content, thereby providing a molded article having excellent saline water resistance, chemical resistance, light resistance and good knot strength, and capable of maintaining high transparency.

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.