385results about "Monocomponent copolyamides artificial filament" patented technology

Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.

The invention discloses a preparation method of nylon fibers. The preparation method comprises the following steps: directly spinning after taking raw materials containing 1,5-pentamethylene diamine and adipic acid to react. The invention further provides the nylon fibers prepared by the method. The method adopts a manner of combining nylon polymerization and fusion direct spinning to prepare nylon 56 wires so that the production cost is reduced, the waste gas is reduced and the pollution to the environment is reduced. The high-performance nylon fibers prepared by the method can be further used for preparing textile materials including yarns, woven fabrics, knitted fabrics or non-woven fabrics, can be widely applied to the fields of clothing material industries, decoration carpets and the like, and has a wide industrial application prospect.

A filament type nano-sized long fiber and a method of producing the same are disclosed. In the method, a spinning solution or a spinning melt is electro-spun in drops using a spinneret to which a critical voltage is applied, and the spun drops are continuously collected on a multi-collector. The spinning solution is produced by dissolving a blend or copolymer consisting of two or more kinds of polymers in a solvent. The spinning melt is produced by melting the polymers. The multi-collector is selected from the group consisting of a plate type collector, a roll type collector, and a combination thereof. The filament type nano-sized long fiber is processed into a yarn through one step during the electrospinning process, and thus, mechanical properties are better than those of a conventional nanofiber non-woven fabric. Consequently, the filament type nano-sized long fiber can be utilized for the extended application.

Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.

The invention provides a polyamide 5X high-strength fiber and a preparation method thereof. The production raw materials of the polyamide 5X high-strength silk at least include 1,5-pentamethylene diamine and dicarboxylic acid, and the breaking strength of the polyamide 5X high-strength silk is 8.0-10.0cN/dtex. The preparation method comprises the following steps: (1) polymerizing 1,5-pentamethylene diamine with dicarboxylic acid, thereby forming polyamide 5X melt, or heating the polyamide 5X resin till reaching a molten state, thereby forming the polyamide 5X melt; (2) spinning the polyamide 5X melt, thereby forming a raw fiber; and (3) treating the raw fiber, thereby obtaining the polyamide 5X high-strength silk. The polyamide 5X high-strength silk provided by the invention has the characteristics of high strength, low elongation and low heat shrinkable property, has the advantages of excellent wear resistance and excellent alkaline resistance, and has an excellent flame retardant effect.

The invention relates to a method for preparing an aramid IIII fiber, which comprises the following steps of: (1) synthesizing a spinning stock solution, carrying out low-temperature copolymerization by adopting three monomers of p-phenylenediamine, paraphthaloyl chloride and 5(6)-amido-2-(4-amidophenyl)benzimidazole as raw materials and adopting dimethylacetylamide/lithium chloride as a solvent; (2) spinning by adopting a dry method spinning process, i.e. leading the spinning stock solution obtained in the previous step to pass through a spinneret and directly enter a hot inert gas channel and evaporating and removing the solvent in the spinning stock solution by utilizing a hot inert gas to obtain cured raw yarn; and (3) carrying out water washing and heat treatment on the raw yarn and winding to obtain the aramid IIII fiber. The method has high solid content of the spinning stock solution, high spinning speed, great improvement of spinning efficiency, obvious reduction of fiber manufacturing cost, improved mechanical performance of the manufactured aramid IIII fiber and wide application prospect.

Provided is a fiber containing a composition obtained by mixing a compound having at least a ring structure containing one carbodiimide group, the first nitrogen and second nitrogen thereof being linked together through a linking group, with a polymer compound having an acidic group. Also provided is a fiber structure made thereof. A fiber and a fiber structure, which have improved hydrolysis resistance and from which no free isocyanate compounds are produced, can be provided.

The invention relates to a flame retardant yarn comprising aromatic polymer fiber containing sulfuryl, a fabric and garment made of the same and a preparation method thereof. The yarn comprises a high temperature resistant inherent flame retardant fiber (A), conventional fire-retardant fiber (B) and flame retardant cellulose fiber (C). The conventional fire-retardant fiber (B) can be one of flame retardant nylon, flame retardant polyester and flame retardant acrylic selectively. The yarn is mainly applied to preparation of the protective camouflage fabric and garment with permanent flame retardance, wear resistance and good comfortable performance.

The invention discloses an aramid III fiber with a fluorine-containing surface, which is characterized in that: the surface of the fiber contains a carbon-fluorine covalent bond structure and a carboxyl-hydroxyl group; the contact angle between the surface of the fiber and water is 68 to 82 degrees; the shear strength between composite material layers prepared from the fiber is 47.3 to 55 MPa; and the tensile strength of gum dipped filaments is 4.6 to 5.4 GPa, and the tensile modulus is 145 to 168 GPa. The invention also discloses a method for preparing the aramid III fiber with the fluorine-containing surface. The fiber surface hydrophilicity of the aramid III fiber subjected to fluoridation is obviously improved; and the shear strength between the prepared composite material layers, and the tensile strength and the tensile modulus of the gum dipped filaments all can be improved by 20 to 30 percent. The method has the advantages of high fluoridation rate, short treatment time, can continuous surface treatment for the fiber on line, high stability of the surface activation effect after treatment, low cost and good application prospects.

The invention relates to a copolymerized flame-retardant polyamide 66 fiber and a preparation method thereof, especially to a method for preparing the flame-retardant polyamide 66 fiber by preparing a block flame-retardant polyamide 66 copolymer through polymerization of a phosphorus-containing reactive flame retardant, then pelletizing and drying the polyamide 66 copolymer and then carrying out melt spinning. The method is characterized in that the flame-retardant reacts with diamine or dihydric alcohol to produce a flame-retardant prepolymer, then the flame retardant prepolymer reacts with polyamide 66 prepolymer so as to obtain the flame-retardant polyamide 66 copolymer, and finally, the flame-retardant polyamide 66 copolymer is subjected to melt spinning so as to prepare the copolymerized flame-retardant polyamide 66 fiber. The copolymerized flame-retardant polyamide 66 fiber prepared in the invention has excellent mechanical properties, good flame retardation durability and a limit oxygen index of more than 30%. The flame-retardant polyamide 66 fiber can be used for fabricating civil filaments like clothes, carpets, curtains, cloth for furniture, etc. and fabricating industrial filaments like cord fabrics, transport belts, fishing nets, cables, military fabrics, etc.

The invention relates to a nanometer fiber filter material. The nanometer fiber filter material is characterized by comprising a filter base material and a nanometer fiber layer formed on the filter base material, wherein the mass ratio of the filter base material to the nanometer fiber layer is 100:1-600:1. The nanoscale fiber material layer is composited on the surface of a traditional textile through an electrostatic spinning technology; the nanometer fiber fineness ranges from dozens of nanometers to hundreds of nanometers; fibers are cross-linked in an intricating mode; ultra-high magnitude-order nanoscale micro-holes exist, and the porosity is larger than 90%; the thickness of the fiber layer can be designed and machined according to the requirements of different products; PM2.5 and dust with the diameter larger than 2.5 microns can be totally filtered out, zero emission is achieved, different raw materials can be selected to machine the nanometer fiber layer according to the work condition and the characteristics of composited materials, and meanwhile the requirements for filtering precision, work condition temperature, chemical conditions and other aspects can be met. The running resistance of finished products is low, and filtering speed is high. The service life is long, the nanometer fiber filter material can be repeatedly used, and therefore running cost is greatly reduced, and higher cost performance is achieved.

Provided is a hollow fiber with a structure including a cavity positioned at the center of the hollow fiber, macro-pores present in the periphery of the cavity, and meso-pores and pico-pores present in the periphery of the macro-pores, wherein the pico-pores are connected to each other in a three-dimensional manner to form a three-dimensional network. The hollow fiber contains a polymer derived from a polyamic acid, wherein the polyamic acid includes repeating units prepared from aromatic diamines and dianhydrides containing at least one functional group present in an ortho-position relative to an amine group.

The invention discloses a biomass-based semi-aromatic polyamide copolymer having the advantages of excellent thermal property and low water absorption rate. The biomass-based polyamide resin contains a furan diacid unit (a), a terephthalic acid unit (b), a biomass-based 1,10-decamethylene diamine unit (c), and an aliphatic diamine unit (c) with the carbon number of above 4 except the unit (c), wherein the content of the unit (a) is 50-98mol% of the total amount of the unit (a) and the unit (b), and the content of the unit (d) is 0-30mol% of the total amount of the unit (c) and the unit (d). The copolymer has excellent physical and mechanical performance, can be used in engineering plastics, and also can be used in other industrial materials and materials for manufacturing electrical and electronic devices.

The invention relates to a fire-retardant yarn of a blended polymer fiber containing aromatic polyamide and polyarylsulfone and fabric and clothes produced by the fire-retardant yarn and production method of the fabric and clothes. The yarn comprises a high temperature resistant nature fire-retardant fiber (A), a conventional fire-retardant fiber (B) and a fire-retardant cellulose fiber (C), and the conventional fire-retardant fiber is selected from fire-retardant polyamide, fire-retardant polyester and fire-retardant acrylic. The yarn is mainly used for producing protective camouflage fabric and clothes which are forever fire retardant, wear resistant and good in comfortableness.

A polyamide composition, which includes an optical brightener together with either an antimicrobial agent or anti-oxidant stabilizer, or both, is suitable for making yarns, and fabrics, garments, molded articles or other articles such as carpets from these yarns. Processes for incorporating optical brighteners into polyamide compositions, polymers and yarns to make fabrics and molded articles that exhibit superior whiteness after heat-setting are also disclosed.

One aspect of an improved microfiber and nanofiber properties can be obtained from a novel nylon material. The nylon can comprise a nylon copolymer comprising (diamino-dicyclohexyl)-alkane, preferably bis-(4 amino-cyclohexyl)methane and at least one other nylon monomer. Another aspect of the novel nylon can comprise a poly alkylene oxide-nylon block copolymer. Such a copolymer can contain block copolymer units wherein the block units comprise segments of ethylene oxide, propylene oxide or mixtures thereof and a nylon block comprising nylon monomers typically comprise a cyclic lactam, an alpha omega diamine and alpha omega diacid or mixtures thereof.

The present invention relates to a preparation method for aromatic copolyamide fibers. According to the preparation method, p-phenylenediamine, one or two diamine monomers and terephthaloyl chloride are adopted to carry out a low temperature solution polymerization reaction in a cosolvent-containing amide solvent system to prepare an aromatic copolyamide solution with a solid content of 2-10%, and the solution is sequentially subjected to deaeration, filtration, spinning, water washing, drying and oiling to prepare the newborn aromatic copolyamide fibers, wherein a breaking strength is 9-16 cN/detx, an elastic modulus is 300-450 cN/detx, and after the newborn aromatic copolyamide fibers are subjected to a heat treatment for 20-60 min at a temperature of 300-500 DEG C under a vacuum condition, the obtained fibers have a breaking strength of 25-35 cN/detx and an elastic modulus of 950-1350 cN/detx.

The invention relates to a high-temperature resistant cutting preventing composite yarn and the application of the high-temperature resistant cutting preventing composite yarn, belonging to the technical field of special yarn. The high-temperature resistant cutting preventing composite yarn comprises a central fiber and a coated fiber, wherein the central fiber is used as an inner core, and the coated fiber is formed by twisting, winded with the central fiber and coated outside the central fiber. The high-temperature resistant cutting preventing composite yarn is characterized in that the central fiber is the chemical filament and accounts for 30-70% by mass of the composite yarn, the coated fiber is the short aramid fiber 1414 and accounts for 70-30% by mass of the composite yarn. The high-temperature resistant cutting preventing composite yarn integrates the outstanding high-temperature resistance and fire resistance of the short aramid fiber 1414 and the advantage of excellent cutting-preventing performance of the chemical filament, and the fabric made of the high-temperature resistant cutting preventing composite yarn by processing can be used in the high-temperate and sharp work environment. The high-temperature resistant cutting preventing composite yarn is safe and durable.

The invention discloses a preparation method of polyphenylene terephthalamide (PPTA) copolymer adopting dimethylacetamide (DMAC) direct spinning. The method comprises the following steps: 4,4'-diaminodiphenylsulfide or 4,4'-diaminodiphenyl ether is used as third monomer, m-phthaloyl chloride is introduced as fourth monomer to perform copolymerization with p-phthaloyl chloride and p-phenylenediamine in a solvent system and prepare uniform, transparent and thick PPTA copolymer size, and the concentration of the polymer is adjusted to perform dope spinning. The method of the invention effectively avoids of adopting the complicated production equipment to perform the polymerization of PPTA; cheap 4,4'-diaminodiphenylsulfide or 4,4'-diaminodiphenyl ether is used as the third monomer and the fourth monomer with a meta-structure is introduced to prepare the PPTA copolymer which can be directly dissolved in DMAC, thus avoiding of using concentrated sulfuric acid as spinning solvent; and the spinning solvent is consistent to the polymerization solvent, the concentration of the polymer is adjusted to perform dope spinning with DMAC and the production process can be greatly simplified.

A polyamide resin comprising a dicarboxylic acid constitutional unit comprising an adipic acid unit and a diamine constitutional unit comprising a pentamethylenediamine unit and a hexamethylenediamine unit wherein a weight ratio of the pentamethylenediamine unit to the hexamethylenediamine unit being in the range of 95:5 to 60:40; a vibration-welded molded product having an excellent vibration welding strength, a hinged molded product and a binding band having an excellent low-temperature toughness, and a filament having an excellent transparency which are obtained from the polyamide resin; and a hinged molded product comprising a polyamide resin constituted of an adipic acid unit and a pentamethylenediamine unit.

The invention relates to caprolactam hydrolyzed polymer fibres and a spinning method thereof. The spinning method comprises the following steps: preparing a polyamide 6 prepolymer at low temperature, pre-controlling the content of oligomers in a melt, carrying out auxiliary end-blocking by binary acid to reduce the content of end amino groups in a system, then carrying out end-blocking by ethylene glycol, after that, carrying out chain growth by means of gylcol ester removal exchange, wherein in the obtained product, the content of extractable matters is not greater than 2wt%, and the content of cyclic dimers is not greater than 0.3wt%; then, carrying out direct melt-spinning formation after the condensation polymerization reaction is concluded. The spinning method disclosed by the invention is simple in process, and capable of reducing energy consumption while increasing the utilization rate of caprolactam; the obtained melt is capable of being used for direct melt-spinning, easy in realizing high-capacity large-scale production, and capable of being applied to the fields of garment fibres, industrial silk, engineering plastics and the like.

The invention relates to a high-performance chloric heterocyclic aramid fiber as well as a preparation method and application. A chloric group and a heterocyclic ring unit are introduced on an aramid fiber macromolecular chain in a copolymerization manner, the binding force of the fiber and resin is improved while the high performance of the fiber is met, and the fiber has good performance conversion rate when being applied to the field of reinforced composite materials. The preparation method comprises the processing steps of preparing chloric heterocyclic polyamide solution, and carrying out defoaming, spinning, solidifying, stretching in a plastifying manner, washing, oiling, drying and heat treatment on the polyamide solution to obtain the high-performance chloric heterocyclic aramid fiber. The high-performance chloric heterocyclic aramid fiber is 24-32cN/dtex in elongation at break, 700-1100cN/dtex in elasticity modulus, is 2.3-4.0% in elongation at break, has excellent performances such as high strength, high modulus and the like, and has good binding property with the resin, and the reinforced resin composite material product has potential application prospect in the fields such as aviation, space flight, ships and warships, weapons, electronic and the like.

The invention discloses low-melting-point and flame-retarding copolymerized nylon shown as a formula (I) and a preparation method thereof. The preparation method of the low-melting-point and flame-retarding copolymerized nylon comprises the following steps: enabling a DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) derivative and diamine to react to synthesize a P-containing flame retardant; then copolymerizing the P-containing flame retardant, fatty acid and fatty amine together, and carrying out pre-condensation reaction for 2h to 3h under conditions that the temperature is 200 DEG C to 230 DEG C and the vacuum degree is 1.7MPa to 2.0MPa; carrying out vacuum polymerization reaction for 1h to 2h under conditions that the temperature is 230 DEG C to 250 DEG C and the vacuum degree is -0.095MPa; cooling to 220 DEG C to 240 DEG C, and introducing nitrogen gas to carry out balance reaction for 0.5h, so as to prepare the low-melting-point and flame-retarding copolymerized nylon with a melting point range of 100 DEG C to 130 DEG C, the relative viscosity of 2.0 to 2.8, a flame-retarding limited oxygen index of 28 percent to 32 percent and a flame-retarding grade of UL-94V0. The product disclosed by the invention is a transparent and non-crystalline glassy mass polymer, and can be used for the fields of hot-melt adhesives and fiber spinning. (The formula (I) is shown in the description) .

A separator for alkaline batteries exhibits excellent property for holding the alkaline electrolyte, is not degraded even when the separator is used for alkaline batteries using a positive electrode mix containing an agent having a great oxidizing ability for enhancing the discharging property under a great load, maintains the function as the separator even when the separator is exposed to high temperatures for a long time and can be effectively used for alkaline batteries which are used for portable information instruments requiring the excellent discharging property under a great load such as digital cameras. The separator for alkaline batteries has a non-woven fiber structural material which comprises a polyamide fiber formed with a polyamide constituted with 60% to 100% by mole of a dicarboxylic acid unit and 40 to 99% by mole of 1,9-nonanediamine unit and a solvent-spun cellulose fiber as the main component fibers, and the ratio of the amounts by mass of the polyamide fiber to the cellulose fiber is 20:80 to 80:20. Preferably, the polyamide forming the polyamide fiber comprises the 2-methyl-1,8-octanediamine unit in combination with the 1,9-nonanediamine unit, and the ratio of the amounts by mole of the 1,9-nonanediamine unit to the 2-methyl-1,8-octanediamine unit is 99:1 to 40:60.