342results about "Monocomponent copolyesters artificial filament" patented technology

The invention discloses an antibacterial and deodorant blended fabric, a preparation method thereof and application of the antibacterial and deodorant blended fabric in underwear, and relates to the technical field of fabrics. When the antibacterial and deodorant blended fabric is prepared, firstly, indolyl polyester is subjected to melt spinning to be prepared into fibers; the preparation method comprises the following steps: reacting fibers, indole and indole-6-formaldehyde, reacting with 4-(aminomethyl)-2, 6-di-tert-butylphenol, and reducing to obtain modified polyester fibers; secondly, the pretreated bamboo fibers react with carbon disulfide and potassium hydroxide; the preparation method comprises the following steps: oxidizing a modified bamboo fiber precursor obtained by reacting the modified bamboo fiber with 1-(2-propenyl)-1, 3, 5-triazine-2, 4, 6 (1H, 3H, 5H)-triketone to obtain a modified bamboo fiber, and oxidizing the modified bamboo fiber precursor to obtain the modified bamboo fiber; the modified polyester fibers and the modified bamboo fibers are blended and woven to obtain fabric, and then the fabric is finished through a finishing agent to obtain the antibacterial and deodorant blended fabric. The antibacterial and deodorant blended fabric prepared by the invention has good antistatic, antibacterial and durable properties.

The invention belongs to the technical field of regenerated polyester fibers, and particularly relates to a preparation method of low-temperature easy-to-dye regenerated polyester fibers, which specifically comprises the following steps: firstly, carrying out transesterification on waste polylactic acid and aliphatic dibasic acid to obtain a double-carboxyl-terminated polylactic acid oligomer; sequentially carrying out homogenization reaction and condensation polymerization reaction on the double-end carboxyl polylactic acid oligomer and polyether diamine to obtain modified polylactic acid, and spinning the modified polylactic acid to obtain the low-temperature easy-to-dye regenerated polyester fiber. Wherein the number of carbon atoms of the aliphatic dibasic acid is 4-20, the number-average molecular weight # imgabs0 # of the double-end carboxyl polylactic acid oligomer is 2000-12000 g / mol, and the number-average molecular weight of the polyether diamine is 600-4000 g / mol; the low-temperature easy-to-dye regenerated polyester fiber prepared by the method is high in mechanical strength, can be dyed by adopting disperse dye at 80-100 DEG C, has the dye uptake of 95% or above, and is good in color fastness.

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.

The present invention provides a system and a method for preparing a polyester polyol prepolymer. The system comprises an atmospheric pressure bubbling reaction rectifying tower and a reduced pressure heating reaction rectifying tower. The method comprises: introducing a protective gas into an atmospheric pressure bubbling reaction rectifying tower, introducing a raw material for preparing a polyester polyol prepolymer into the atmospheric pressure bubbling reaction rectifying tower, and carrying out a primary esterification reaction or an ester exchange reaction; and introducing the primary esterification product or the ester exchange product into a reduced pressure heating reaction rectifying tower, and carrying out one or more of a deep esterification reaction, an ester exchange reaction, and a pre-polycondensation reaction to obtain the polyester polyol prepolymer. The present invention has the advantages of high reaction efficiency, stable product quality, easiness in product separation, convenience in large-scale production and the like.

A method for preparing direct melt-spun high-viscosity PBAT / low-viscosity PET two-component elastic fiber and a high-viscosity PBAT polymerization reactor. This method uses two production lines respectively used to produce a high-viscosity PBT melt and a low-viscosity PET melt, which are then spun. The high-viscosity PBAT production line comprises a first esterification reactor, a second esterification reactor, a first prepolymerization reactor, a second prepolymerization reactor, and a high-viscosity PBAT polymerization reactor. The polymerization reactor is designed with a special disc structure in a parallel two-shaft disc reactor, and the two shafts are rotated in opposite directions, improving the devolatilization effect and self-cleaning, significantly increasing the viscosity. By using this method, the cost is low and the production capacity is high, the process flow is shortened, the fiber strength can reach 2.55˜2.85 cN / dtex, the crimp shrinkage rate can reach 25%˜60%, and the crimp stability can reach 58%˜70%.

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 a preparation method of modified regenerated polyester fibers, and belongs to the technical field of textile materials. The modified regenerated polyester fiber is prepared by taking waste polyester fiber, ethylene glycol, a catalyst, a flame-retardant bacteriostatic agent, a polycondensation catalyst antimony trioxide, a heat stabilizer trimethyl phosphate and a delustering agent titanium dioxide as raw materials. The preparation method comprises the following steps: firstly, decomposing the waste polyester fiber into small molecules by using ethylene glycol to obtain an alcoholysis product; according to the preparation method, waste polyester fibers are selected as raw materials, so that the preparation method is green and environment-friendly, a flame-retardant bacteriostatic agent and ethylene glycol are polymerized, an alcoholysis product, antimony trioxide, trimethyl phosphate and titanium dioxide are added into a polymerization product, modified PET is obtained through a condensation polymerization reaction, and finally, the modified PET is subjected to melt extrusion and spinning to obtain the modified regenerated polyester fibers. The prepared modified regenerated polyester fiber has good flame retardance and antibacterial activity, and can be widely applied to the field of clothing and home textiles.

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 present invention provides a biodegradable resin composition and a biodegradable molded article including the same, wherein the biodegradable resin composition includes: a first biodegradable resin including a first repeating unit derived from a diol, a second repeating unit derived from aromatic dicarboxylic acid, and a third repeating unit derived from aliphatic dicarboxylic acid; and a crystallization accelerator, wherein the crystallization accelerator is included in a content of 100 ppm to 50,000 ppm, and an isothermal crystallization time at 90° C. according to Measurement Method 1 (see the detailed description) is 10 seconds to 900 seconds.

The present invention relates to a biodegradable resin composition and a biodegradable nonwoven fabric including the same, and more particularly, the biodegradable resin composition includes a biodegradable resin including a first repeating unit derived from a diol having 2 to 4 carbon atoms and a second repeating unit derived from an aliphatic dicarboxylic acid having 2 to 6 carbon atoms; and an inorganic nucleating agent, wherein the biodegradable resin composition has a crystallinity of 15% to 50% as measured using differential scanning calorimetry.

The invention discloses a moisture-absorbing and sweat-releasing polyester-spandex blended antibacterial fabric, a preparation method thereof and application of the fabric in underwear, and relates to the technical field of fabrics. When the moisture absorption and sweat releasing polyester and ammonia blended antibacterial fabric is prepared, firstly, phosphorus-containing polyester and dinitrobenzyl pyridine react to obtain modified polyester, the polyester is prepared into fibers through melt spinning, and then reduction is conducted; secondly, enabling thiophene-3-alcohol to react with the polyurethane prepolymer, preparing fibers through a dry spinning process, and enabling the fibers to react with thiophene and 3-aminothiophene to obtain modified polyurethane fibers; finally, the modified polyester fibers and the modified polyurethane fibers are blended into yarn, the yarn reacts with toluene diisocynate and then reacts with isophorone diisocyanate to obtain modified yarn, the modified yarn is woven into fabric, and the moisture absorption and sweat releasing polyester and polyurethane blended antibacterial fabric is obtained. The moisture-absorbing and sweat-releasing polyester-spandex blended antibacterial fabric prepared by the invention has good antibacterial property, antistatic property and mechanical property.

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.

The invention discloses a high-shrinkage easy-to-dye mixed fiber and a preparation method thereof.The method comprises the steps that polyester melt is extruded and cooled to prepare nascent fibers, part of the nascent fibers are oiled and drafted to prepare FDY, and the other nascent fibers are oiled to prepare POY; the FDY filaments and the POY filaments are subjected to network fiber blending and winding to obtain blended filaments; the drafting is five-roller drafting, the temperature of a hot roller HR1, the temperature of a hot roller HR2 and the temperature of a hot roller HR3 are 82-87 DEG C, the temperature of a hot roller HR4 and the temperature of a hot roller HR5 are 95-105 DEG C, and the draw ratios of the hot roller HR1, the hot roller HR2, the hot roller HR3, the hot roller HR4 and the hot roller HR5 are 1.01-1.2, 1.10-1.5, 2.5-3.0 and 1 in sequence; the draw ratio of a spinning nozzle during extrusion is 165-180%; the boiling water shrinkage rate of the combined filament yarn is 60 + / -5%, and the differential shrinkage rate is 43-50%. The fabric prepared from the mixed fibers has excellent wool feeling, softness and drapability, and is outstanding in dyeing performance.

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).

The invention relates to the technical field of copolyester staple fibers, and discloses a preparation method of biodegradable aromatic-aliphatic copolyester staple fibers, which comprises the following steps: (1) mixing terephthalic acid, glycollic acid, ethylene glycol and a catalyst, and carrying out esterification reaction to obtain an esterified substance, with the molar weight ratio of terephthalic acid to glycollic acid being (60-80%): (20-40%), the total percentage is 100%. Mixing the esterified product with an antioxidant and a stabilizer, and performing condensation polymerization to obtain copolyester; and (2) drying the copolyester, carrying out melt extrusion, cooling to obtain a protofilament, bundling, oiling, drafting and shaping to obtain the copolyester staple fiber. Glycollic acid is introduced as a third monomer, and the polyester structure is modified from the molecular level, so that the polyester has certain mechanical strength and good spinnability while having good degradation performance.

The invention discloses recycled polybutylene terephthalate and a preparation method thereof. The recycled polybutylene terephthalate is polybutylene terephthalate (PBT) obtained by directly carrying out chemical depolymerization and ester exchange on recycled polyethylene terephthalate and 1, 4-butanediol by using a titanium catalyst chelated with polybasic acid or polybasic alcohol and polymerizing, so that the manufacturing procedures are reduced, and products with good physical properties are produced.

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 object of the present invention 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, 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 diol 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 70 to 99.95 mol % and a ratio of sodium sulfoisophthalate to all the dicarboxylic acid components is 0.05 to 10 mol %, when a total amount of diol components is taken as 100 mol %, a ratio of diethylene glycol to all glycol components is 1 to 10 mol %, a content of a free cyclic monomer consisting of terephthalic acid, sodium sulfoisophthalate, ethylene glycol, and diethylene glycol is 20 ppm or less, and a content of a free cyclic trimer consisting of terephthalic acid, sodium sulfoisophthalate, and ethylene glycol is 200 ppm or less.

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.

The present invention provides a liquid crystal polymer, an LCP fiber, and a preparation method and application thereof, and belongs to the technical field of polymer materials. The monomer unit of the liquid crystal polymer of the present invention includes NH- and O- groups, and the molar content of the monomer unit containing NH- is 1 to 15%. The preparation method of the LCP fiber of the present invention uses the above-mentioned liquid crystal polymer as a raw material, sprays an alkyl phosphate ester salt aqueous solution during the spinning process, and the alkyl phosphate ester salt reacts with the amide group of the liquid crystal polymer to form a hydrogen bond, so that the alkyl phosphate ester salt is tightly combined with the LCP fiber, greatly improving the surface polarity of the LCP fiber, thereby improving the binding force between the LCP fiber and other resins.

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.

The invention relates to the technical field of polyester fibers, and discloses a preparation method of a welding yarn melt direct-spinning composite filament and application of the welding yarn melt direct-spinning composite filament in fabrics, the preparation method comprises the following steps: (1) mixing terephthalic acid, isophthalic acid, adipic acid, ethylene glycol, neopentyl glycol and a catalyst to prepare slurry, and carrying out continuous esterification reaction and polycondensation reaction to obtain a polyester fiber melt direct-spinning composite filament; the low-melting-point polyester material is prepared; and (2) respectively conveying the low-melting-point polyester material and the high-melting-point polyester material to a spinning composite box body in a melt form, metering according to a ratio, conveying to a spinning assembly to spray out a filament A and a filament B, and sequentially cooling, stretching, interlacing and plying, and coiling and forming to obtain the welding yarn melt direct-spinning composite filament. The composite filament has low melting point, high strength and elongation and dimensional stability, can be applied to different weaving fields, and plays a role in welding and fixing among different fiber yarns.

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.