386 results about "Nylon 6" patented technology

The invention provides a metal organic sulfonic acid-based solid acid catalyst applied to nylon 6 recovery and depolymerization and a preparation method thereof, and realizes upgrading and recovery of waste nylon 6. The main contents are as follows: (1) a structural design and a preparation method of the metal organic framework sulfonic acid-based solid acid catalyst; and (2) the solid acid is used for catalytic depolymerization of nylon 6. The problems that equipment corrosion is aggravated by inorganic acid in the nylon 6 recovery process and a liquid-phase catalyst is difficult to separate and recover are solved, and the application prospect is good.

The invention relates to the technical field of chinlon industrial yarns, and discloses a preparation method of a high-strength and high-toughness chinlon industrial yarn, which comprises the following steps: (1) preparing raw materials; (2) mixing the materials; (3) melt spinning; (4) stretching and heat treatment; (5) fiber surface modification; according to the invention, by fusing the advantages of high crystallization speed of nylon 6 and high melting point and high strength of nylon 66, a matrix material with good processing fluidity is formed, and the strength and fatigue cycle resistance of the chinlon industrial fiber are obviously improved. By introducing the maleic anhydride grafting agent, polar groups can be introduced among molecular chains through grafting reaction, so that the hydrogen bond density and crystallinity are remarkably improved, the molecular chains are arranged more regularly, and the tensile strength and heat resistance of the material are improved. The sea-island structure of the polyether ester elastomer effectively absorbs impact energy, so that the elongation at break is greater than or equal to 28%; the nano silicon dioxide inhibits crack propagation, and the service life of the material is remarkably prolonged.

The invention discloses flame-retardant anti-fouling copolymer nylon 6 and a preparation method and application thereof, and the preparation method comprises the following steps: adding a phosphorus-containing flame-retardant monomer, a silicon-containing reaction monomer, lactam, an initiator and a catalyst into a polymerization reaction kettle, and introducing nitrogen to replace air in the kettle; under the protection of nitrogen, firstly raising the temperature to 180-220 DEG C to carry out prepolymerization reaction, and then raising the temperature to 240-260 DEG C to carry out polymerization reaction; and after the polymerization reaction, removing water vapor in the system to react in a normal pressure state, then vacuumizing to react, filling nitrogen to recover to normal pressure after the reaction is finished, and discharging and cooling to obtain the flame-retardant and anti-fouling copolymer nylon 6. The phosphorus-containing comonomer and the silicon-containing comonomer are introduced into the copolymerized nylon, the intrinsic flame-retardant nylon material with high flame-retardant efficiency and permanent flame retardance is prepared through melt copolymerization at a relatively low introduction amount, and the intrinsic flame-retardant nylon material has certain hydrophobic and anti-fouling properties and also retains good mechanical properties and spinnability of the nylon material.

The invention provides a nylon 6 nanofiber virus-removing filtering membrane and a preparation method and application thereof.The nylon 6 nanofiber virus-removing filtering membrane comprises a base material and a nylon 6 nanofiber membrane compounded to the surface of the base material, the average pore size of the virus-removing filtering membrane is 20 nm, the virus-removing filtering membrane plays a role in blocking parvoviruses, the surface of the virus-removing filtering membrane is charged, and the surface of the virus-removing filtering membrane is not prone to being damaged. Proteins with the same charges on the surface can be prevented from adhering to the surface of the fiber. In the preparation process of the virus-removing filtering membrane, the nylon 6 nanofibers with a certain diameter range are selected and compounded on the surface of the base material in a stable dispersion state, the uniform microporous virus-removing filtering membrane is prepared, the effect that parvoviruses are blocked and protein molecules are not easily intercepted is achieved, the hydrophilicity of the nylon 6 nanofibers is relatively good, and the virus-removing filtering membrane has a good application prospect. The non-specific adsorption of the filtering membrane on the protein is reduced; the nylon 6 nanofiber virus-removing filtering membrane can be applied to the field of biological medicine products, and has important significance on separation and purification of biological preparations.

The invention relates to the technical field of engineering plastic detection, and particularly discloses an aging detection and evaluation method and system suitable for nylon 6 in a marine environment, the system comprises nylon 6 as a core layer, an aging response color-changing material as a surface layer and a middle layer located between the core layer and the surface layer; the thickness of the middle layer is 200-250 [mu] m, and the composite conductive film is transferred to the position 0.2 mm below the surface of the nylon 6 component in a hot pressing mode; the thickness of the surface layer is 0-200 microns and is realized by spraying an aging response color-changing material solution. By integrating the specially designed aging response color-changing material and the conductive film into the nylon 6 matrix, real-time, visual and efficient detection of the aging process is realized. According to the method, the problem that equipment such as a traditional optical fiber spectrometer is complex and expensive is solved, the convenience of field detection is greatly improved through double signal output of color gradient indication and simple electronic reading, and a brand new technical solution is provided for life prediction and preventive maintenance of nylon 6 components in ocean engineering.

The invention discloses a nanofiber-containing polymer composite material and a preparation method thereof, and the nanofiber-containing polymer composite material is prepared from the following raw materials in parts by weight: 90-100 parts of polypropylene, 10-15 parts of nylon 6, 13-16 parts of a modified flame retardant, 4-7 parts of modified carbon nanotubes, 3-5 parts of a compatilizer, 0.5-0.8 part of an antioxidant and 0.3-0.5 part of a lubricant. According to the composite material, polypropylene and nylon 6 are blended, and a modified flame retardant prepared by a formulated method, a modified carbon nanotube, a synergistic compatilizer and other assistants are added, so that the defects that an existing polypropylene material is easy to degrade and inflammable, a traditional flame retardant and an antioxidant are easy to migrate and lose efficacy and the like are effectively overcome; according to the polypropylene composite material, the mechanical property of the material is maintained and improved while efficient flame retardance and excellent weather resistance and aging resistance (especially ultraviolet aging resistance) are achieved, the problem that in the prior art, performance in multiple aspects is difficult to consider is solved, and the application range of the polypropylene composite material is widened.

The invention relates to the technical field of vacuum bag films for aeronautical manufacturing, and discloses an eleven-layer co-extruded film for aeronautical use and a preparation process thereof, and the preparation process specifically comprises the following steps: carrying out grafting modification treatment on polyamide acid by using a monoalkenyl diepoxy composite flexible compound through a carboxyl-epoxy ring-opening reaction to prepare alkenyl functionalized processable polyimide; the preparation method comprises the following steps: carrying out modification treatment on nylon 6 resin by using 3-mercaptopropionic acid through an amino-carboxyl condensation reaction to prepare mercapto functionalized nylon; under the hot melting condition, alkenyl functionalized processable polyimide and sulfydryl functionalized nylon are induced to be subjected to reactive compounding through a free radical initiator, PA-PI alloy master batch is prepared, the master batch serves as a functional modification component of copolymerized polyamide 6 / 66 resin, an eleven-layer co-extrusion film is prepared through an eleven-layer co-extrusion blow molding process, and the eleven-layer co-extrusion film is used as a functional modification component of the copolymerized polyamide 6 / 66 resin. The film product has excellent comprehensive performance and can be used as a high-temperature-resistant vacuum bag film for curing aviation composite materials.

The invention discloses a bio-based fiber reinforced composite material and a preparation method thereof, and belongs to the technical field of bio-based fiber composite materials. The bio-based fiber reinforced composite material is prepared from the following raw materials in parts by weight: 60 to 80 parts of nylon 6, 10 to 20 parts of bio-based aramid fiber, 5 to 10 parts of modified carbon fiber, 2 to 6 parts of hyperbranched polyester modified zinc oxide and 1 to 3 parts of antioxidant, the bio-based aramid fiber is prepared by reacting 2, 5-furandicarbonyl chloride with two diamine monomers, and the two diamine monomers respectively contain trifluoromethyl and sulfuryl; the modified carbon fiber is obtained by grafting polyamidoamine on the surface of carbon fiber; the hyperbranched polyester terminal group of the hyperbranched polyester modified zinc oxide contains an epoxy group. The modified carbon fiber, the bio-based aramid fiber and the hyperbranched polyester modified zinc oxide are added into the nylon matrix, so that the composite material is endowed with good ultraviolet resistance, comprehensive mechanical properties and durability.

The invention relates to the technical field of polypropylene composite materials, and discloses a high-strength antibacterial polypropylene composite material and a preparation method thereof, the polypropylene composite material comprises 60-90 parts by weight of polypropylene, 10-40 parts by weight of nylon 6, 2-8 parts by weight of maleic anhydride grafted polypropylene, 0.5-2 parts by weight of an arginine antibacterial agent and the like. The arginine antibacterial agent has good compatibility with polypropylene and nylon 6, is uniformly dispersed in the composite material, has little influence on the mechanical properties of the material, and can maintain very high tensile strength and impact strength. A side chain of the arginine antibacterial agent contains a large number of guanidyl antibacterial groups, and the arginine antibacterial agent is good in heat resistance, not prone to thermal decomposition, uniformly dispersed in a composite material matrix and capable of effectively killing staphylococcus aureus and escherichia coli, so that the composite material has very high antibacterial performance.

The invention relates to the technical field of high polymer materials, and discloses a wear-resistant nylon bar and a preparation method thereof. The nylon bar comprises the following raw materials in percentage by mass: 45-65% of nylon 6, 12-25% of glass fiber, 5-8% of nano silicon dioxide, 8-15% of a wear-resistant modifier, 4-8% of a flexibilizer, 0.5-2% of a silane coupling agent, 0.5-1.5% of a lubricant, 0.1-0.3% of an antioxidant and 0.5-2% of a heat stabilizer. According to the nylon bar, nylon 6 is used as a main material, and functional aids such as a wear-resistant modifier, a flexibilizer and glass fibers are added, so that the wear resistance of a matrix is improved; wherein the wear-resistant modifier has a microcapsule-like structure and can be broken when the base material is rubbed to release the internal modified base oil, so that the wear resistance is realized.

The invention discloses a Schiff base epoxy oligomer chain extender as well as a preparation method and application thereof. The preparation method of the Schiff base epoxy oligomer chain extender comprises the following steps: adding p-hydroxybenzaldehyde and p-hydroxyaniline into ethanol, reacting at 30-70 DEG C for 2-5 hours, and performing suction filtration to obtain a 4-((4-hydroxybenzylidene) amino) phenol intermediate; and mixing the 4-((4-hydroxybenzylidene) amino) phenol intermediate, epoxy chloropropane and a catalyst, reacting at 80-100 DEG C for 3-7 hours, cooling to 50-70 DEG C, dropwise adding a strong alkali solution, reacting for 4-8 hours after dropwise adding, washing with deionized water, retaining an organic layer, and carrying out rotary evaporation on the organic layer to obtain the product. The rigidity, toughness and heat resistance of the modified nylon 6 prepared by applying the Schiff base epoxy oligomer chain extender are improved, and the modified nylon 6 still has processability similar to that of nylon 6.

The invention provides a nylon modified material as well as a preparation method and application thereof, and relates to the technical field of nylon compositing, the nylon modified material comprises the following components: nylon 66, low-viscosity nylon 6, a toughening agent, a compatilizer and a flow crystallization accelerant; wherein the toughening agent comprises a block copolymer containing a polyethylene glycol chain segment and a polydimethylsiloxane chain segment; the compatilizer comprises a compound containing a diglycidyl ether group. According to the nylon modified material provided by the invention, under the condition that the modulus of nylon 66 is slightly reduced, the impact strength is improved, so that the nylon modified material has the characteristics of high flowability, high toughness, self-lubrication and the like, and can meet the requirements of occasions such as automobile parts and industrial production.

The present invention relates to a bimetallic layered hydroxide / phytic acid synergistic flame-retardant nylon 6 composite material and its preparation method and application, belonging to the technical field of flame retardant material synthesis. The composite material is prepared from nylon 6, bimetallic layered hydroxide and phytic acid. Wherein, the phosphate functional group in the phytic acid can chelate with the metal ion in the bimetallic layered hydroxide, thereby forming a novel flame retardant. When combustion occurs, the layered structure and thermal decomposition products such as metal oxides, metal phosphates, and carbon-containing aromatic network structure substances in the flame retardant help to suppress the release of smoke and toxic gases, and the release of metal ions and phosphorus-containing free radicals helps to suppress the spread of fire. Compared with pure nylon 6, the peak heat release rate and total heat release rate of the composite material are greatly reduced, the limiting oxygen index is greatly increased, and the vertical combustion test reaches V-0 level. At the same time, the raw material sources in the preparation method of the composite material are abundant, the operation is simple, and it is suitable for scaled-up production.

The invention discloses a preparation method of reactive antioxidant grafted modified nylon 6 and a film thereof, and belongs to the technical field of nylon modification. A reactive antioxidant containing a hindered phenol structure and nylon 6 are subjected to melt chemical grafting to form a covalent bond combined nylon 6-antioxidant system, and hindered phenol provides hydrogen atoms and can be combined with free radicals generated in the aging process, so that the chain reaction of the hindered phenol is terminated, and phenoxy free radicals with low activity are formed by the hindered phenol. According to the invention, the reactive antioxidant grafted modified nylon 6 is further processed into a film product, and the nylon 6 film product prepared by the method has the advantages of less antioxidant migration, aging resistance, high mechanical property retention rate and the like.

The invention discloses an antibacterial nylon 6 material as well as a preparation method and application thereof, relates to the technical field of nylon materials, and solves the problem that the antibacterial property and the mechanical property of nylon are difficult to consider at the same time. The material has a structure shown as a formula (I), R1 and R2 are independently selected from one of C1-24 linear chain / branched chain aliphatic groups, substituted / unsubstituted C3-12 alicyclic hydrocarbon groups / C6-18 aryl groups / C7-30 aralkyl groups, or R1 and R2 on the same N and connected N form 5-7-membered saturated / unsaturated heterocyclic rings; and each E-group is independently selected from the structural general formula (II). Each R3 is independently selected from one of C1-24 linear chain / branched chain aliphatic groups, substituted / unsubstituted C3-12 alicyclic hydrocarbon groups, C6-18 aryl groups and C7-30 aralkyl groups; x is an integer selected from 1 to 18; m is equal to 0.01-0.50, and m + n is equal to 1. The antibacterial nylon 6 material has a broad-spectrum and efficient antibacterial effect, is lasting in antibacterial effect and excellent in mechanical property, and can be used for preparing textiles, daily necessities, building materials, packaging materials or panels. # imgabs0 #

The present invention relates to the technical field of nylon 6 flame retardancy, and specifically to a carbon-based composite flame retardant and flame-retardant nylon 6 prepared by in-situ polymerization. The preparation raw materials thereof at least include: amino-functionalized metal oxide modified carbon nanotubes, compounds containing triazine-based flame retardant groups, p-hydroxybenzaldehyde, and p-aminobenzoic acid. The preparation raw materials of the amino-functionalized metal oxide modified carbon nanotubes at least include an acidified and opened carbon nanotube solution, an alcohol solution of a metal salt, and an amino silane solution. Using carbon nanotubes as the main flame retardant, a composite flame retardant is constructed with other flame retardant components by chemical methods, and an in-situ polymerization method is used to develop a nylon 6 material with comprehensive flame retardancy and difficult spreadability, reducing the risk of fire generation and spread, and having extremely high market application and promotion value.

The invention provides a high-performance polyamide flame-retardant composite material based on element synergistic effect and a preparation method thereof, and belongs to the technical field of polyamide flame-retardant materials. The preparation method comprises the following steps: preparing a phosphorus-nitrogen flame retardant, preparing a surface-modified rare earth-silicon-based material, preparing a mixture, extruding and granulating. The step of preparing the mixture comprises the following steps: uniformly mixing brominated polystyrene (BPS), a phosphorus-nitrogen flame retardant, a rare earth-silicon-based material, glass fibers, an antioxidant 1098, a heat stabilizer diisooctyl phenyl phosphite, nylon 66 and nylon 6 to obtain the mixture; according to the invention, the use of antimony oxide in the traditional bromine-antimony flame-retardant system preparation process is abandoned, and the preparation process is simple, good in repeatability, green, environment-friendly and efficient.

The invention relates to a preparation method of an impact-resistant polyethylene composite pipe, and discloses a preparation method of an impact-resistant polyethylene composite pipe, which comprises the following steps: adding polyethylene, nylon 6, polyamide grafted POE (Polyolefin Elastomer), an antioxidant and an assistant into a high-speed mixer for mixing, and then carrying out melt extrusion and molding through a twin-screw extruder. The impact-resistant polyethylene composite pipe is obtained. The main chain of the polyamide grafted POE is an ethylene-octylene copolymer, and the side chain is grafted with a polyamide molecular chain, so that the polyamide grafted POE can be used as a compatilizer of polyethylene and nylon 6, the compatibility between polyethylene and nylon 6 is improved, the polyethylene and nylon 6 form an alloy phase, the mechanical property of the material is improved, and the POE can be used as an elastomer material with high toughness and good mechanical property, so that the mechanical property of the material is improved. The material has a good toughening effect on polyethylene, and the tensile property, the bending strength and the impact strength of the material are remarkably improved.

The invention discloses an ultra-dispersed flame-retardant engineering plastic master batch and a preparation method thereof, and relates to the technical field of functional plastics. The functional master batch is prepared from the following components in parts by weight: 100 parts of a nylon 6 sheet, 0.5 to 8 parts of a modified carbon nano tube, 5 to 15 parts of diethyl phosphinated ethyl aluminum phosphite, 5 to 15 parts of a flame retardant, 2 to 5 parts of a carbon forming agent, 0.5 to 5 parts of epoxy silicon dioxide and 0.5 to 5 parts of a compatilizer. According to the flame-retardant plastic master batch disclosed by the invention, by introducing the diethyl phosphinated ethyl aluminum phosphite and the flame retardant, a carbon layer and a Schiff base structure are formed on the surface of a material when the plastic master batch is combusted, so that the interaction force between molecular chains of the plastic master batch is improved, the dual properties of flame retardance and molten drop resistance of the plastic master batch are improved, and the problem of fire spreading caused by molten drops is solved.

The invention relates to the technical field of high polymer materials, and discloses a low-temperature-resistant nylon composite material and a preparation method thereof. The nylon composite material prepared by the invention is prepared from the following raw materials in parts by weight: 45-55 parts of nylon 6, 15-25 parts of nylon 66, 2-5 parts of a castor oil-based reinforcing agent, 7-10 parts of glass fibers, 5-10 parts of a toughening agent, 0.5-1 part of a dispersing agent, 0.5-2 parts of a lubricating agent, 0.7-1.5 parts of an antioxidant and 1-2 parts of a coupling agent. According to the invention, nylon 6 and nylon 66 are taken as main raw materials, and functional aids such as a flexibilizer and a castor oil-based reinforcing agent are added, so that the low-temperature resistance and impact toughness of the composite material are improved, and the low-temperature brittleness phenomenon is reduced; wherein the toughening agent and the castor oil-based reinforcing agent are used for remarkably improving the low-temperature resistance through a plasticizing-toughening synergistic effect, dynamic-elastic network complementation and other mechanisms.

The invention relates to a high-performance flame-retardant nylon 6 and a preparation method thereof. The high-performance flame-retardant nylon 6 comprises caprolactam, cyanuric acid, cyanuric acid, a caprolactam hydrolysis ring-opening polymerization initiator, a polymer structure regulator, an impact modifier, and a flame-retardant dispersant. During the caprolactam hydrolysis ring-opening polymerization process, melamine and cyanuric acid are added as two raw materials to participate in the chemical reaction of nylon 6 molding and are connected to the molecular chain of nylon 6. A polymer regulator and an anti-modification impact agent are further added to prepare high-performance flame-retardant nylon 6 with UL94V-0 flame retardancy, better impact strength, excellent tensile properties, and lower cost in a one-step process.

The invention relates to the technical field of vacuum bag films, and discloses a vacuum bag film, which is prepared from the following raw materials in parts by weight: 80 to 120 parts of nylon 6 resin; 0.5 to 2 parts by weight of modified graphene; 0.1 to 0.3 part by weight of a lubricant; 0.1 to 0.3 part by weight of an antioxidant; the invention also discloses a preparation method of the vacuum bag film, which comprises the following steps: adding the raw materials in parts by weight into a high-speed mixer, controlling the temperature at 180-190 DEG C, adding the uniformly mixed raw materials into a double-screw extruder, and carrying out blow molding to obtain the vacuum bag film with the thickness of 30-60 microns. The graphene oxide obtained through modification is added into a nylon 6 resin blending system, amido bonds in nylon 6 molecules are coordinated with iron ions in the modified graphene, the capacity of the amido bonds forming hydrogen bonds with water is weakened, and therefore the vacuum bag film with the low water absorption rate is obtained.

The invention discloses a double-layer composite structure cable sheath and a preparation method thereof, and belongs to the technical field of cable sheath materials. The invention relates to a preparation method of a cable sheath with a double-layer composite structure. The preparation method comprises the following steps: uniformly mixing polyvinyl chloride, an organic ester compatilizer and a metal salt stabilizer to obtain a PVC mixture; caprolactam is subjected to ring opening treatment and then subjected to copolymerization with adipic acid and polyether amine, and modified nylon 6 is obtained; uniformly mixing the modified nylon 6, an aliphatic diester lubricant and an amine stabilizer to obtain a nylon mixture; the cable core passes through a co-extrusion die head, the PVC mixture and the nylon mixture wrap the cable core from inside to outside in a melt co-extrusion mode, and after shaping, the cable sheath of the double-layer composite structure is obtained. The problems of layering, bubbles, poor interface bonding force and the like in combined processing of the nylon layer and the PVC layer are solved. And the obtained cable sheath has high toughness, bending resistance and fluidity.

The invention provides a composite intumescent flame retardant modified polyamide composite material and a preparation method thereof. The flame-retardant nylon 66 and / or nylon 6 composite material is prepared from the following components in parts by weight: 75-85 parts of nylon 66 and / or nylon 6 matrix and 15-25 parts of composite intumescent flame retardant, wherein the composite intumescent flame retardant is prepared from the following components in parts by weight: 30-50 parts of a phytic acid derivative; 20 to 40 parts of melamine pyrophosphate (MPP); 5 to 15 parts of modified nanosheets; and 10-20 parts of a hydrogen bond cross-linking agent. According to the composite intumescent flame retardant modified polyamide composite material disclosed by the invention, the limit oxygen index and the fireproof grade can be remarkably improved under the condition that the addition amount of the composite intumescent flame retardant is low, and the mechanical property of the polyamide material is not influenced.

The present invention provides a method for recovering ε-caprolactam and polyether polyurethane from a material comprising nylon 6 and polyether polyurethane in a plant, wherein the plant comprises a separation section [B], a depolymerization section [C], a recovery section [D], and a purification section [E].

The invention discloses a high-strength puncture-resistant composite film, and relates to the technical field of composite films, the high-strength puncture-resistant composite film comprises a surface protection layer, a first reaction layer, a second reaction layer, a third reaction layer and a bottom protection layer which are arranged in sequence; the first reaction layer is prepared from nylon 6 and an amino silane coupling agent; the second reaction layer is made of thermoplastic polyurethane, and a containing channel and cyanoacrylate located in the containing channel are arranged in the second reaction layer; the third reaction layer comprises polypropylene, calcium carbonate and imidazolium ionic liquid; when the composite film is punctured, the cyanoacrylate is in contact with the amino silane coupling agent to generate curing reaction, so that a punctured object is fixedly clamped at the position penetrating through the first reaction layer; the imidazolium ions are in contact with the cyanoacrylate to generate polymerization reaction and form a polymer, and the calcium carbonate is in contact with the leachate to release CO2, so that the polymer is forced to be pressed into a puncture hole, and a puncture object is further retained, so that the anti-puncture effect of the composite membrane is relatively good.

The present invention relates to the technical field of polymer materials, and discloses a wear-resistant nylon rod and a preparation method thereof. The nylon rod in the present invention comprises the following raw materials in percentage by mass: 45-65% nylon 6, 12-25% glass fiber, 5-8% nano-silicon dioxide, 8-15% wear-resistant modifier, 4-8% toughening agent, 0.5-2% silane coupling agent, 0.5-1.5% lubricant, 0.1-0.3% antioxidant, and 0.5-2% thermal stabilizer; the nylon rod is made of nylon 6 as the main material, and functional additives such as wear-resistant modifier, toughening agent, and glass fiber are added to improve the wear resistance of the substrate; wherein the wear-resistant modifier has a structure similar to that of a microcapsule, which can break when the substrate material is rubbed, releasing the modified base oil inside, thereby achieving wear resistance.

The invention provides a high-performance flame-retardant nylon composite material and a preparation method thereof, and belongs to the technical field of flame-retardant nylon composite materials. The high-performance flame-retardant composite material comprises the following raw material components: glass fibers, antimony trioxide, brominated polystyrene, an acid-binding agent, nylon 6, a composite antioxidant, a heat stabilizer and a lubricant. The high-performance flame-retardant nylon composite material disclosed by the invention has excellent mechanical property, flame retardance and whiteness.

The present invention discloses a flame-retardant high-strength optical cable and a preparation method thereof, including at least one reinforcing member, at least one cable core distributed outside the reinforcing member, an inner sheath coated outside the cable core, and a flame-retardant outer sheath coated on the inner sheath. Wherein the cable core is composed of at least one optical fiber and a loose tube; wherein, by weight, the flame-retardant outer sheath is made of the following raw materials: 80-90 parts of polypropylene, 10-20 parts of nylon 6, 3-6 parts of compatibilizer, 20-25 parts of modified flame retardant, 1-3 parts of antioxidant, 0.5-1 part of lubricant, and 5-10 parts of modified glass fiber. The optical cable has excellent flame-retardant performance, good mechanical properties, simple structure, easy preparation, long service life, and good application prospects.

The application relates to the technical field of textile materials, and provides hyaluronic acid microcapsules, hyaluronic acid-polyamide 6 master batches, hyaluronic acid-polyamide 6 filaments and preparation methods. The hyaluronic acid microcapsules are prepared by taking gum arabic and gelatin as wall materials, the hyaluronic acid-polyamide 6 master batches are prepared by using the hyaluronic acid microcapsules, and then the hyaluronic acid-polyamide 6 filaments are prepared by using the hyaluronic acid-polyamide 6 master batches. The hyaluronic acid microcapsules provided by the application can be uniformly dispersed in polyamide 6 fibers, and the spinnability and mechanical properties of the fibers are not affected, and the mechanical properties of the obtained filaments are excellent. The results of examples show that the breaking strength of the hyaluronic acid-polyamide 6 DTY filaments prepared by the application is 3.89-4.02 cN / dtex, and the breaking elongation is 26.31-28.02%.