79 results about "Polytrimethylene terephthalate" patented technology

The invention belongs to the technical field of polymers, and discloses a bio-based parallel composite elastic fiber which comprises a first fiber and a second fiber, the first fiber is prepared from diamine monomer modified bio-based polytrimethylene terephthalate; and the second fiber is prepared from diamine monomer modified bio-based polytrimethylene terephthalate with a poly (trimethylene ether glycol) chain segment. According to the fiber, two kinds of polytrimethylene terephthalate are adopted for parallel composite spinning, the comfort and softness, rebound resilience and breaking strength of the fiber are improved through a poly trimethylene ether glycol chain segment, the compatibility, comfort and softness, rebound resilience and breaking strength of the two kinds of fiber are further improved through diamine modification, and a fiber material with excellent performance is obtained. Meanwhile, the invention also provides a preparation method of the fiber material.

The invention relates to the technical field of high-performance fibers, in particular to a high-performance fiber containing carbon nanotubes and a preparation method of the high-performance fiber. The preparation method comprises the following steps: adding ammonium polyphosphate, alkylphenol polyoxyethylene ether and tetraethyl orthosilicate to obtain a silicon-coated ammonium polyphosphate material; then adding a silicon-coated ammonium polyphosphate material and gamma-aminopropyltriethoxysilane, so as to obtain a modified silicon-coated ammonium polyphosphate material; and mixing the modified silicon-coated ammonium polyphosphate material, tannic acid and a buffer solution to obtain the double-layer coated ammonium polyphosphate material. The fiber is obtained by adding a carbon nanotube material, a double-layer coated ammonium polyphosphate material, polytrimethylene terephthalate, a compatilizer and polypropylene and carrying out melt spinning. And then the fibers are sequentially soaked in an ethylenediamine solution, a polyglutamic acid solution and a chitosan solution, and the high-performance fibers are obtained. The obtained high-performance fiber has good flame retardance and antibacterial property, so that the high-performance fiber has a wide application prospect in the technical field of high-performance fibers.

The purpose of the present invention is to provide: a low-shrinkage fiber; a method for producing the low-shrinkage fiber; an air-blended yarn comprising the polytrimethylene terephthalate fiber; and a fabric comprising the air-blended yarn. The low-shrinkage fiber is substantially composed of polytrimethylene terephthalate, and can be used to produce a precursor for a fabric, which has a soft texture and a low shrinkage rate due to heat. The present invention is characterized in that 90 mol% or more of polytrimethylene terephthalate fibers are composed of trimethylene terephthalate repeating units, the boiling water shrinkage of the polytrimethylene terephthalate fibers is 5% or less, and the elastic modulus of the polytrimethylene terephthalate fibers at an elongation of 20% is 5 cN / dtex or less.

The invention discloses an anti-impact MPP power tube and a preparation method thereof, and belongs to the technical field of power tube preparation. The preparation method of the impact-resistant MPP electric power tube comprises the following steps: step 1, mixing polypropylene, polytrimethylene terephthalate and carbon fibers to obtain a base material; 2, sequentially adding the modified flame retardant, the modified flexibilizer, the compatilizer, the coupling agent, the lubricant and the antioxidant into the base material, and fully stirring and mixing to obtain a mixture; and step 3, mixing the mixture by using a high-speed mixer, then adding the mixture into a twin-screw extruder, and carrying out extrusion molding, cooling shaping, cutting and polishing to obtain the impact-resistant MPP electric power tube. The MPP electric power tube prepared by the method has excellent flame retardant property, mechanical property, chemical corrosion resistance and impact resistance.

The present application relates to the field of textile technology, and specifically discloses a high-elastic hygroscopic antistatic composite fiber and a preparation method thereof; a high-elastic hygroscopic antistatic composite fiber, comprising the following raw materials in parts by weight: 20-40 parts of polytrimethylene terephthalate, 60-80 parts of polyethylene terephthalate, 10-18 parts of nano inorganic particles, 5-8 parts of sericin, 5-10 parts of sulfonic acid hydrophilic modifier, 3-5 parts of polyether ester antistatic agent, 5-8 parts of carbon nanotubes, and 1-3 parts of surfactant; the polyether ester antistatic agent is preliminarily prepared into an antistatic masterbatch with carbon nanotubes; by combining polytrimethylene terephthalate and polyethylene terephthalate, under the synergistic effect of other components, the elasticity, antistatic and hygroscopic properties of the composite fiber can be improved on the basis of maintaining the original strength of the fiber.

The invention relates to the field of textile materials, and discloses a multi-thread elastic knitted fabric and a preparation method thereof.The multi-thread elastic knitted fabric is prepared from, by weight, 30 parts of ternary polymerization elastic fibers; 70 parts of modified bamboo fiber; the ternary copolymerized elastic fiber is prepared from the following raw material components in parts by weight: 28-32 parts of polylactic acid; 38 to 42 parts of polytrimethylene terephthalate; 28 to 32 parts of poly (butylene succinate); 1 to 3 parts of graphene nanosheets; 0.5 to 1.5 parts of epoxidized soybean oil; 2 to 4 parts of beta-cyclodextrin; the modified bamboo fibers are subjected to enzymatic treatment, silane coupling agent modification, dopamine coating treatment and ultrasonic treatment. Through micro gradient structure design and multi-step functionalization treatment of the ternary polymerization elastic fibers and the modified bamboo fibers, unification of excellent elastic recovery, comfort, multifunctionality and durability is achieved.

The invention belongs to the technical field of blood glucose test paper, and particularly relates to rapid blood glucose detection test paper and a preparation method thereof. The blood glucose test paper is composed of a blood glucose test paper impregnation liquid and a test paper base material, wherein the test paper base material is composed of 10-20% of graphite powder, 10-15% of polyurethane resin, 5-10% of polybutylene terephthalate, 5-10% of polytrimethylene terephthalate, 5-10% of polyethylene, 5-10% of hydroxyethyl cellulose and 45-60% of ethylene glycol monobutyl ether; the blood glucose test strip impregnation liquid consists of 40-45% of phosphate buffer, 2-3% of glucose dehydrogenase, 40-45% of normal saline, 0.5-1% of ferric oxide, 0.5-1% of cobalt oxide, 2-3% of ascorbic acid and 1-3% of m-xylylenediamine; the prepared blood glucose test paper can still provide a more reliable result under the condition that blood glucose fluctuates greatly, has good stability, is slightly influenced by environmental factors, can give a result within four to five seconds, is reliable in measurement result, facilitates a user to know the blood glucose level in time, and is convenient for the user to use. And a patient can be helped to take measures quickly when the symptom of hypoglycemia or hyperglycemia occurs, so that crisis is avoided.

The invention relates to the technical field of chemical fibers and textiles, in particular to a moisture-absorption quick-dry spandex-free elastic knitted fabric and a preparation method thereof.The fabric is formed by weaving polyester fibers and polyester filament yarns, the mass of the polyester fibers accounts for 50%-70% of the total fabric, and the mass of the polyester filament yarns accounts for 30%-50% of the total fabric; the polyester fibers are hydrophilic quick-dry composite elastic antibacterial polyester fibers formed by carrying out composite spinning processing on PTT (Polytrimethylene Terephthalate) and antibacterial PET (Polyethylene Terephthalate); and the polyester filament yarns are high-shrinkage antibacterial polyester filament yarns with cross sections and the like. The high-shrinkage antibacterial polyester yarn adopts a special high-molecular polymer and has the advantages of high temperature resistance and good antibacterial property, the isophthalic acid modifier assists in reducing the crystallinity and improving the contractibility, the spinning performance is not influenced, the two modified fibers are reasonably interwoven and exert respective advantages, the prepared moisture-absorbing quick-drying spandex-free elastic knitted fabric has the advantages that the fibers are subjected to copolymerization modification, and the moisture-absorbing quick-drying spandex-free elastic knitted fabric has good moisture-absorbing and quick-drying effects. And the fabric has a cotton-like characteristic, does not need to be added with spandex, and has various excellent properties after being treated.

The invention relates to the technical field of textile, provides a preparation method of a creel woven leno heald vamp capable of randomly changing yarns in the warp direction, and solves the problems that the existing woven vamp is poor in light weight effect and ventilation effect, relatively poor in wear resistance and folding resistance, and the yarns cannot be randomly changed in the warp direction when the vamp is woven. Comprising the following steps: (1) preparing raw materials: 0.12 mm PTPEE (polytrimethylene terephthalate) lustrous folding-resistant yarns, 0.20 mm TPU (thermoplastic polyurethane) high-low temperature composite low-elasticity monofilaments, 0.20 mm TPU lustrous high-elasticity monofilaments and polyester DTY167dtex / 36F semi-lustrous high-elasticity yarns; (2) weaving: weaving the raw material yarns into grey cloth by adopting a creel tatting doup machine, wherein the grey cloth comprises polygonal tatting mesh tissues and convex texture tissues; and (3) carrying out pre-shaping treatment on the gray fabric, and carrying out the processes of open-width washing, tentering shaping, inspection, packaging, warehousing and the like to obtain the creel woven leno heald vamp.

This invention discloses a glass polishing brush, comprising a brush body and bristles distributed on the surface of the brush body. The bristles contain PTT monofilaments. A method for polishing glass using the glass polishing brush is also provided, preferably in combination with a cerium oxide polishing solution. This invention also discloses the use of PTT monofilaments for glass polishing, wherein the diameter of the PTT monofilaments is 4 mil to 30 mil. The glass polishing brush of this invention achieves effective polishing of the glass surface, resulting in a smoother and more even glass surface. Furthermore, compared to other monofilaments, PTT monofilaments do not create numerous deep grooves at the chamfered edges of the glass during the polishing process.

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 utility model discloses a polyurethane synthetic leather structure for sports and leisure shoes, which comprises a non-woven fabric impregnated polyurethane bottom layer, an organic silicon modified polyurethane micro-foaming layer, a polyurethane foaming layer and a polyurethane surface layer which are sequentially compounded from bottom to top, the tensile modulus of the non-woven fabric impregnated polyurethane bottom layer, the tensile modulus of the organic silicon modified polyurethane micro-foaming layer, the tensile modulus of the polyurethane foaming layer and the tensile modulus of the polyurethane surface layer are gradually increased in sequence, and a base material of the non-woven fabric impregnated polyurethane bottom layer is a non-woven fabric base material formed by co-spinning polytrimethylene terephthalate with Z-shaped conformation and nylon. According to the polyurethane synthetic leather structure for the sports and leisure shoes, the problems that the existing polyurethane synthetic leather for the shoes is rigid in hand feeling and unsatisfactory in fold recovery, and the wearing comfort and attractiveness are influenced are solved.

The present disclosure relates to a nonwoven including a first layer and a second layer. The first layer has first fibers and a first mean pore size. The first fibers have a first fiber fineness. The second layer includes second fibers and a second mean pore size. The second fibers have a second fiber fineness, and the second fiber fineness is equal to or greater than the first fiber fineness, and the second mean pore size is smaller than the first mean pore size. The first fibers may include a polymer and the polymer may include polytrimethylene terephthalate, polybutylene terephthalate and a combination thereof. The second fiber may include a thermoplastic fiber. The nonwoven may be included in an absorbent article. At least one of the topsheet and the fluid management layer of the absorbent article may include the nonwoven.

A foamed polymer composition includes a matrix polymer component, and from 0.01 wt % to 2 wt %, based on the weight of the polymer composition, of a nanostructured fluoropolymer, a nanostructured fluoropolymer encapsulated by an encapsulating polymer, or a combination thereof. The matrix polymer component includes polybutylene terephthalate (PBT), polyetherimide (PEI), polyethylene terephthalate (PET), polycarbonate (PC), poly(p-phenylene oxide) (PPO), polystyrene (PS), polyphenylene sulfide (PPS), polypropylene (PP), polyamide (PA), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), copolymers thereof, or a combination thereof. Methods for forming foamed polymer compositions, including core-back molding methods and extrusion foaming methods, are also described.

The invention relates to the technical field of polyester modification, and discloses modified polytrimethylene terephthalate and a preparation method thereof. The modified polytrimethylene terephthalate is formed by copolymerizing monomers including 1, 3-propylene glycol, furandicarboxylic acid, terephthalic acid and modified polyethylene glycol; the modified polyethylene glycol is polyethylene glycol with a sulfonic acid group on a side chain. According to the invention, furandicarboxylic acid and polyethylene glycol with a sulfonic acid group on a side chain are introduced into PTT, so that PTT can have better dyeability and color fastness during cationic dye dyeing.

The invention relates to the technical field of high polymer materials, and provides a porous composite medium and a preparation method and application thereof.The porous composite medium comprises polymer fibers used for forming a porous structure, and a polymer forming the polymer fibers comprises polyethylene and a polymer A, the polymer A comprises at least one of polypropylene, polyethylene glycol terephthalate, polyamide, polybutylene terephthalate and polytrimethylene terephthalate, and the SEM average diameter of the polymer fiber is 5-40 [mu] m; a plurality of aggregates formed by sintering the polymer fibers exist in the porous composite medium; the PMI average pore size of the porous composite medium is 0.1-5 [mu] m, and the porosity is 40-80%. The porous composite medium has high flux and excellent mechanical strength (high hardness and compression strength), is suitable for being used as a porous composite medium for gas filtration and liquid filtration, and has a wide application prospect.

The present invention discloses an impact-resistant MPP power pipe and its preparation method, belonging to the technical field of power pipe preparation. The preparation method of the impact-resistant MPP power pipe includes the following steps: Step 1: Mix polypropylene, polytrimethylene terephthalate and carbon fiber to obtain a base material; Step 2: Sequentially add a modified flame retardant, a modified toughening agent, a compatibilizer, a coupling agent, a lubricant and an antioxidant to the base material, and fully stir and mix to obtain a mixed material; Step 3: Mix the mixed material using a high-speed mixer, then add it to a twin-screw extruder, extrude, cool and shape, cut and polish to obtain the impact-resistant MPP power pipe. The MPP power pipe prepared by this method has excellent flame retardant performance, mechanical performance, chemical corrosion resistance and impact resistance.

The present invention provides a stretchy thermal insulation composite material (1) having good stretchability, thermal insulation capability and durability, comprising a thermal insulation cotton layer (10) and a melt-blown layer (20); thermal insulation cotton layer (10) has a unit weight of 20gsm to 300gsm and comprises a thermal insulation fiber (11); melt-blown layer (20) is disposed on thermal insulation cotton layer (10), has a unit weight of 15gsm to 100gsm and comprises an elastic melt-blown fiber (21); part of thermal insulation fiber (11) and part of elastic melt-blown fiber (21) link to each other at an interface between thermal insulation cotton layer (10) and melt-blown layer (20); the material of elastic melt-blown fiber (21) is a virgin or recycled elastic polymer material selected from thermoplastic polyurethane, thermoplastic polyester elastomer, polytrimethylene terephthalate and combinations thereof, and elastic melt-blown fiber has a diameter of 0.1 µm to 35 µm.

To provide an inner cotton having physical properties similar to those before compressive packaging, even after compressive packaging of a fiber product containing an inner cotton is opened, and a fiber product containing the same.SOLUTION: There is provided an inner cotton in which silicone-based surface-treated synthetic fibers that are hollow and flatly crimped are main fibers. Preferably, fineness of the main fiber is within a range of 4 to 20 dtex, and the synthetic fibers as the main fibers are polyethylene terephthalate fibers. It is preferable to contain polytrimethylene terephthalate fibers, and to contain hollow fibers other than the main fibers. It is also preferable to contain solid crimp fibers, and preferably, the solid crimp fibers are hollow fibers and polytrimethylene terephthalate fibers. There is also provided a fiber product using the inner cotton.SELECTED DRAWING: None

The utility model discloses a PTT (polytrimethylene terephthalate) fiber towel with antibacterial, deodorant, anti-mite and mildew-proof functions, which comprises a towel body, a lockrand is fixedly sewn on the outer side of the towel body, the towel body comprises a base cloth layer, one side of the base cloth layer is fixedly connected with an anti-static layer, one side of the anti-static layer is fixedly connected with an antibacterial layer, and the other side of the anti-static layer is fixedly connected with an anti-static layer. One side of the antibacterial layer is fixedly connected with a moisture absorption layer, one side of the moisture absorption layer is fixedly connected with a skin-friendly layer, the anti-mite and antibacterial capability of the towel can be greatly improved through the arrangement of a multi-layer structure, and breeding of bacteria and mites can be effectively restrained.

The invention relates to a laminated film comprising a polyethylene sealant film comprising at least an outer layer O, an inner layer I and a core layer C, the core layer C being present between the outer layer O and the inner layer I, wherein the inner layer I is made of an inner layer composition comprising from 75 to 95 wt. % of a component AI that is a linear low density ethylene polymer having a density of from 915 to 925 kg / m3 and a melt flow rate (MFR2) of from 0.5 to 3.0 g / 10 min, determined according to ISO 1133, the wt. % being based on the total weight of the inner layer composition; and a substrate film laminated to the polyethylene sealant film, wherein the substrate film comprises a polyester polymer, selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate, and mixtures thereof; wherein the seal initiation temperature SIT (5 N) of the laminated film is less than 100° C., determined at the inner layer of the polyethylene sealant film according to ASTM F2029, ASTM F88.The invention further relates to an article comprising the laminated film and to the use of laminated film for packaging of an article. Moreover, the invention relates to the use of the polyethylene sealant film for improving the sealing performance of a substrate film comprising a polyester polymer.

The invention discloses a plant-based antibacterial and deodorant polyester-nylon composite fiber and a preparation process thereof. The fiber has a skin-core-island three-phase structure, wherein a core layer contains a blend of 65-75% by mass of regenerated polyester and 25-35% by mass of polyamide 56, and plant-derived composite antibacterial and deodorant microcapsules with beta-cyclodextrin / melamine resin as a double-layer wall material are uniformly dispersed in the core layer; the skin layer takes bio-based polytrimethylene terephthalate as a matrix and contains 1-3wt% of a nanoscale zinc oxide-chitosan composite antibacterial agent; mint-wormwood-tea polyphenol ternary solidified fibers with root diameters are uniformly distributed in the island phase along the axial direction of the fiber. The preparation process comprises the following steps: mixing the plant-based antibacterial agent and polyester chips according to a ratio of (2-5%): (95-98%), and carrying out melt pelletizing to prepare polyester master batches; mixing the master batch with polyester chips, adding 0.1-0.3% of a stabilizer and a dispersant, blending and granulating, and drying with chinlon chips at 90-120 DEG C for 16-24 hours; and after the two raw materials are melted, co-extrusion drafting is carried out through a three-channel spinning assembly at 250-290 DEG C and 3-6 MPa.

The invention discloses a high-performance AGM separator and a preparation method thereof, and belongs to the technical field of lead-acid battery manufacturing. The high-performance AGM separator comprises the following raw materials in percentage by weight: 95%-99% of modified glass fibers, 0.9%-4% of polytrimethylene terephthalate fibers and 0.1%-1% of a compatilizer, the modified glass fiber is epoxy group modified glass fiber, and the compatilizer is hyperbranched polysilane containing amino, sulfonic acid group and quaternary ammonium salt group. The preparation method of the separator comprises the following steps: mixing the modified glass fiber, the polytrimethylene terephthalate fiber and the compatilizer, pulping, proportioning, deslagging, papermaking, drying, rolling and slitting to obtain the AGM separator. The separator prepared by the method has excellent strength and liquid absorbency.

The invention discloses a preparation method of polytrimethylene terephthalate, which comprises the following steps: mixing raw materials containing terephthalic acid, 1, 3-propylene glycol and a catalyst, and carrying out reaction and polycondensation in an inert gas atmosphere to obtain a product containing polytrimethylene terephthalate, the weight-average molecular weight of the polytrimethylene terephthalate in the product is 15000 to 80000; the catalyst is titanyl acetate. The preparation method provided by the invention is high in yield and short in reaction time, the weight-average molecular weight of the product is large, and the intrinsic viscosity of the product is large and reaches 0.98.

The invention discloses a conjugated small molecule photosensitizer with both photo-thermal and photodynamic effects and a preparation method and application thereof.The preparation method of PS-surfactant composite nanoparticles comprises the following steps that the conjugated small molecule photosensitizer is dissolved in a first solvent to obtain a photosensitizer solution, a surfactant is dissolved in a second solvent to obtain a second solvent, and the second solvent is dissolved in a third solvent to obtain the PS-surfactant composite nanoparticles. The preparation method comprises the following steps: preparing a photosensitizer solution and a surfactant solution, uniformly mixing the photosensitizer solution and the surfactant solution to obtain a mixed solution, dropwise adding the mixed solution into a third solvent under an ultrasonic condition, stirring to obtain a photosensitizer-surfactant solution, putting the photosensitizer-surfactant solution into a fourth solvent, dialyzing, and freeze-drying to obtain the photosensitizer-surfactant composite material. The PS-surfactant composite nanoparticles have PTT (polytrimethylene terephthalate) and PDT (polydimethylsiloxane) activities, and are high in antibacterial activity, broad-spectrum in antibacterial capability and good in biocompatibility.

The present invention relates to the field of recycling materials containing polyester terephthalate, particularly polyethylene terephthalate (PET), polybutylene terephthalate (PBT), or polytrimethylene terephthalate (PTT), commonly used in the manufacture of disposable plastic bottles, food trays, textiles, and composite insulation materials. It specifically concerns a process for recycling PET into terephthalic diester, and in particular dimethyl terephthalate (DMT), in less than one hour and without any pretreatment steps. Furthermore, this process uses products with a low environmental impact. It is therefore particularly advantageous from an industrial perspective.

The present invention relates to the field of the recycling of materials comprising terephthalate polyester, notably polyethylene terephthalate (PET) or polybutylene terephthalate (PBT) or polytrimethylene terephthalate (PTT), which are commonly used for the manufacture of disposable plastic bottles, food trays, textiles, composite material for insulation, etc. The invention notably relates to a method for recycling PET to a terephthalic diester and notably to dimethyl terephthalate (DMT) in less than one hour and without a pretreatment step. In addition, this method uses products with low environmental impact. It is therefore particularly advantageous from an industrial viewpoint.

The utility model discloses an antibacterial deodorant linen yarn which comprises a yarn body, and the yarn body comprises a core yarn, a wrapping layer and a fasciated yarn. The covering layer covers the outer side of the core yarn; the fasciated yarn is spirally wound on the outer side of the coating layer; the core yarn is formed by doubling and twisting polyester FDY (fully drawn yarn) filaments, PTT (polytrimethylene terephthalate) fiber filaments and polylactic acid filaments; the coating layer is an antibacterial fiber layer; the fasciated yarn is formed by doubling and twisting linen fiber yarn and antibacterial, mildew-proof and deodorant viscose fiber yarn. Based on the antibacterial and deodorant linen yarn, the core yarn provides strength for the yarn main body and enhances the elasticity of the yarn main body, so that a fabric woven by the yarn main body has certain wrinkle resistance; the coating layer can provide a good antibacterial effect for the yarn main body; the fasciated yarn not only has a good antibacterial effect, but also has mildew-proof and deodorizing functions.

The invention belongs to the technical field of composite fiber production, and discloses a low-temperature dyeable elastic composite fiber filament and processing equipment thereof.The composite fiber filament comprises polyamide fiber, polyphenylene sulfide fiber, polypropylene fiber and waste recycled polyester fiber which are compounded, the waste recycled polyester fibers are one or more of polytrimethylene terephthalate fibers, polyethylene glycol terephthalate fibers and polybutylene terephthalate fibers. The composite fiber filament formed by compounding the polyamide fiber, the polyphenylene sulfide fiber, the polypropylene fiber and the waste recycled polyester fiber has the comprehensive performance of good fracture resistance, hygroscopicity, dyeability, wear resistance, rebound resilience, corrosion resistance, antibacterial property, aging resistance and the like.

The invention discloses a long-acting anti-precipitation flame-retardant reinforced nylon composite material and a preparation method thereof. The long-acting anti-precipitation flame-retardant reinforced nylon composite material comprises 35-65 parts of nylon 66; 15 to 35 parts of glass fiber; 5 to 15 parts of polytrimethylene terephthalate; 5-15 parts of phenolic resin; 2-10 parts of a flame retardant; 5 to 15 parts of triethoxysilane; 0.1 to 1 part of a toughening agent; 1-7 parts of a coupling agent; 0.01 to 5 parts of an antioxidant; and 0.01-5 parts of a lubricant. According to the long-acting anti-precipitation flame-retardant reinforced nylon composite material provided by the invention, the polytrimethylene terephthalate and the phenolic resin are added into the PA66, so that the water absorption of a nylon matrix is reduced; and hydrolytic migration of the flame retardant is hindered, so that the material has excellent precipitation resistance, the mechanical property is greatly improved, the service life of the product is prolonged, and the cost is reduced.