394 results about "Polyamide fibers" patented technology

The present invention addresses the problem of providing a pneumatic tire in which a reduction in tire performance is mitigated despite using polyamide fibers with low amide density. The solution is a pneumatic tire characterized by comprising a carcass layer (50), belt layers (60A, 60B), and a belt reinforcement layer (70A), wherein reinforcing cords (50-1, 70A-1) in the carcass layer (50) and / or the belt reinforcement layer (70A) contains polyamide fibers having an amide density of 14.0 or less, and (i) when a gauge thickness A from the outer circumferential surface on the tire inner-surface side of the reinforcing cords (50-1) of the carcass layer (50) to the tire inner surface is measured at 100 equally spaced points, the average of the gauge thickness A is 1.5 mm or less, or (ii) when a gauge thickness D from the outer circumferential surface on the tire outer-surface side of the reinforcing cords (70A-1) of the belt reinforcement layer (70A) to the tire outer surface is measured at 100 equally spaced points, the gauge thickness D is 6.0 mm or less at 80% of the measurement points or more.

The invention discloses a flame-retardant high-temperature-resistant fiber and a preparation method thereof, and relates to the technical field of fibers. When the flame-retardant high-temperature-resistant fiber is prepared, 1, 6-hexamethylenediamine, 1, 6-adipic acid, tetrahydrodifuran [3, 4-B: 3 ', 4'-D] furantetraone and a phosphorus-sulfur composite flame retardant are copolymerized to generate a polyamide-polyamide acid solution; 4-aminopyridine and the polyamide-polyamide acid solution are subjected to a reaction, and modified polyamide is prepared; the modified polyamide is subjected to melt spinning, and polyamide fibers are prepared; the preparation method comprises the following steps: pretreating nano titanium dioxide by using 4-bromobutyl trimethoxy silane to prepare modified nano titanium dioxide; mixing the modified nano titanium dioxide and ethanol to prepare a light-resistant antibacterial finishing agent; and carrying out post-treatment on the polyamide fiber by using an anti-light antibacterial finishing agent to prepare the flame-retardant and high-temperature-resistant fiber. The prepared fiber is excellent in comprehensive performance, particularly outstanding in flame retardance and high temperature resistance, and suitable for the fields of special protective clothing, high-temperature filtering materials and the like.

The invention relates to a preparation method of a high-antibacterial hydrophobic polyamide fiber. The preparation method comprises the following steps: carrying out melt extrusion grafting on polyamide, a quaternary ammonium salt monomer, an initiator and an auxiliary agent to prepare quaternary ammonium salt grafted polyamide; and carrying out melt blending on the prepared quaternary ammonium salt grafted polyamide, polyamide, cuprous oxide and polydimethylsiloxane to obtain the high-antibacterial hydrophobic nylon composite material. And spinning the high-antibacterial hydrophobic nylon composite material to obtain the high-antibacterial hydrophobic polyamide fiber. The high-antibacterial hydrophobic nylon composite material prepared by the method disclosed by the invention can realize efficient antibacterial performance, and the high antibacterial hydrophobic performance of the prepared polyamide fiber is improved.

The present invention addresses the problem of providing a tire in which deterioration in steering stability is suppressed even when polyamide fibers having a low amide density are used. Provided is a tire which is the solution to the foregoing problem and which is characterized in that: the tire comprises a carcass layer, belt layers (60A, 60B), and a belt reinforcement layer; the carcass layer and the belt reinforcement layer include reinforcement cords; the reinforcement cords of at least one of the carcass layer and the belt reinforcement layer include polyamide fibers having an amide density of 14.0 or less; and (i) angles (α, β) formed by the reinforcement cords (60A-1, 60B-1) of the belt layers (60A, 60B) with respect to the tire circumferential direction (DC) are 25 degrees to 65 degrees, inclusive, or (ii) angles formed by the reinforcement cords of the carcass layer with respect to the tire circumferential direction are 70 degrees or more and less than 90 degrees.

The invention relates to the technical field of knitted fabrics, in particular to a high-strength wear-resistant anti-snagging functional dry knitted fabric for exercise training and a production process thereof, and the production process comprises the following steps: weighing the following raw materials in parts by weight: 30-40 parts of polyester fibers, 20-30 parts of aramid fibers, 5-10 parts of jade fibers and 5-10 parts of polyamide fibers; polyester fibers, aramid fibers, jade fibers and polyamide fibers are subjected to relaxation treatment and then subjected to a drawing procedure, and the mixed roving is obtained. According to the knitted fabric for exercise training, polyester fibers, aramid fibers, jade fibers and polyamide fibers are blended and blended to prepare mixed roving, meanwhile, the mixed roving is infiltrated and improved through infiltrating liquid, finally, the mixed roving is matched with modified polyester filaments to be subjected to circular knitting improvement, and the obtained knitted fabric has the advantages of being excellent in wear resistance, mechanical strength performance and snagging performance, good in elasticity and good in elasticity. And the knitted fabric has remarkable moisture absorption, dryness and dryness and washing resistance, and the comprehensive coordination of the product is excellent.

A non-woven battery separator and processes for forming the non-woven battery separator includes a fiber blend including cellulose fibers, microfibrillated fibers, and optionally polyester and / or aramid fibers. Also disclosed are batteries including the non-woven battery separator. During fabrication, the non-woven battery separator can be effectively dried at temperatures between 120°C and 180°C, which results in the fibers absorbing water when in use. Some battery electrolytes such as lithium hexafluorophosphate react with water to form hydrogen fluoride (HF), which can be corrosive and shorten battery lifecycles and affect performance. Absorbing water from the electrolyte increases the battery life cycle by reducing HF generation.

The invention discloses a high transparency and high toughness polyamide fiber preparation method, which comprises: S10: carrying out melt blending on polyamide and an ethylene-alpha-olefin copolymer elastomer, and extruding under the high shear action to obtain a modified melt; s20, the modified melt is extruded through a spinneret plate to form nascent filaments, the nascent filaments are fed into a cooling area to be rapidly cooled, and nascent fibers are obtained; the retention time of the nascent filaments in the cooling area is 0.1-0.3 second, nitrogen is adopted as a cooling medium in the cooling area, and the temperature of the nitrogen is 10-14 DEG C; s30, carrying out hot stretching treatment on the nascent fiber to obtain a stretched fiber; and S40, carrying out heat setting treatment on the stretched fiber to obtain the polyamide fiber. The polyamide fiber prepared by the method has good toughness and relatively high transparency.

The invention discloses an anti-ultraviolet spinning yarn and a preparation method thereof, and relates to the technical field of spinning yarns. When the anti-ultraviolet spinning yarn is prepared, 2, 4, 6-tri (4-hydroxyphenyl) boroxane and methylphenyl phosphonium chloride are subjected to a reaction, and a phosphorus-boron composite flame retardant is prepared; the preparation method comprises the following steps: polymerizing indole and 5-(aminomethyl) indole to coat the surface of nano titanium dioxide to prepare pre-modified nano titanium dioxide; the pre-modified nano titanium dioxide and (3-acryloyloxypropyl) tri (trimethylsiloxy) silane are subjected to a reaction, and modified nano titanium dioxide is prepared; mixing poly (pentamethylene diamine adipate), the modified nano titanium dioxide and the phosphorus-boron composite flame retardant, and performing melt spinning to obtain polyamide fibers; spinning polyamide fibers to obtain polyamide spun yarns; the polyamide spinning yarn is sequentially finished with the chloroacetic acid finishing liquid and the isoliquiritigenin finishing liquid, and the anti-ultraviolet spinning yarn is prepared. The anti-ultraviolet spinning yarn prepared by the invention has excellent anti-ultraviolet, flame-retardant and anti-static properties.

The invention discloses a heteroaromatic polyamide fiber and a preparation method thereof. The preparation method comprises the following steps: carrying out polymerization reaction on a raw material system comprising a diamine monomer containing a heterocyclic structure, an aromatic diacyl chloride monomer and a composite solvent to obtain an aromatic heterocyclic polyamide solution; mixing the heteroaromatic polyamide solution with Lewis acid to prepare a spinning solution; the spinning solution is subjected to gel spinning, gel filaments are obtained, the gel filaments enter a coagulating bath to be coagulated and plasticized and stretched, washing, drying and hot stretching are carried out, and the aromatic heterocyclic polyamide fiber is obtained. The heteroaromatic polyamide fiber prepared by the method is compact in structure and high in orientation degree, and the orientation degree is 0.92-0.97; the mechanical property is excellent, the tensile strength is 33-41 cN / dt, and the elongation at break is 4.2%-6.1%. Compared with traditional wet spinning, the method has the advantages of high spinning speed and high production efficiency, and is suitable for industrial production.

The present invention provides a fiber structure having excellent antibacterial properties and washing durability, and a method for producing the same. [Solution] A textile structure having polyamide fibers and containing a dye, a quinoline-based compound, and a phenol derivative, wherein the textile structure contains 0.04% by mass or more of the quinoline-based compound relative to the mass of the textile structure, and even after 10 standard washes in accordance with the "SEK Mark Textile Product Washing Method," the textile structure contains 0.04% by mass or more of the quinoline-based compound relative to the mass of the textile structure, and 0.20% by mass or more and 4.00% by mass or less of the phenol derivative relative to the mass of the textile structure.

The invention belongs to the field of novel polyamide composite fiber materials, and particularly discloses a high-toughness polyamide fiber composite material and a preparation method thereof. The composite material is prepared from the following raw materials in parts by weight: 55-75 parts of long-chain polyamide PA610 resin, 10-25 parts of ultra-high molecular weight polyethylene fiber, 8-18 parts of polyether block amide elastomer, 1.5-4 parts of a compound nucleating agent, 0.8-2 parts of a titanate coupling agent and 0.3-1 part of a composite antioxidant. The preparation method is characterized by comprising the following steps: firstly, carrying out surface pretreatment on the ultra-high molecular weight polyethylene fiber by adopting a low-temperature plasma technology so as to improve the interfacial compatibility of the ultra-high molecular weight polyethylene fiber and a resin matrix; and then carrying out melt blending granulation on the pretreated fiber and other raw materials through a twin-screw extruder, wherein the fiber is added from a side feeding port to avoid excessive shearing and breaking. The obtained product has ultrahigh impact toughness, excellent rigidity, excellent low-temperature toughness and heat resistance, and is especially suitable for the fields of manufacturing automobile parts, sports protection equipment and the like with extremely high requirements on toughness and durability.

The invention relates to the technical field of fibers, and discloses a thermal insulation polyamide fiber and a preparation method thereof. Polyurethane modified silicon dioxide aerogel with a phase change unit and a heat insulation carrier is prepared, the polyurethane modified silicon dioxide aerogel and epoxidized carbon nanotubes with light absorption and heat generation performance are jointly introduced into PA6 slices, epoxy groups react with carboxyl and amino at the tail end of a PA6 main chain under the melting condition, the dispersity and compatibility of all components in the PA6 slices are improved, and the heat insulation performance of the PA6 is improved. The polyamide fiber prepared by melt spinning not only has good heat insulation performance, but also can utilize the phase change material and the light absorption heating material to store energy and regulate temperature, so that the heat storage and heat preservation performance of the fiber is further improved.

The utility model discloses a wear-resistant yarn, which relates to the technical field of yarns, and is characterized in that the wear-resistant yarn comprises a high-elasticity core yarn, a moisturizing yarn, a high-strength yarn and a first wear-resistant yarn are spirally wound on the outer side of the high-elasticity core yarn, and the diameters of the moisturizing yarn, the high-strength yarn and the first wear-resistant yarn are the same; the bulkiness of the moisturizing yarn is larger than that of the high-strength yarn and that of the first wear-resistant yarn, the second wear-resistant yarn and the third wear-resistant yarn are arranged on the outer sides of the moisturizing yarn, the high-strength yarn and the first wear-resistant yarn, and the diameter of the second wear-resistant yarn is larger than that of the third wear-resistant yarn. The second wear-resistant yarn and the third wear-resistant yarn are alternately wound on the outer sides of the moisturizing yarn, the high-strength yarn and the first wear-resistant yarn. According to the wear-resistant yarn, the polyamide fibers and the spandex fibers are adopted, and the overall wear resistance and elasticity of the yarn are improved by means of the characteristics of materials.

A device for improving the high-strength polyamide fiber production spinning condition comprises a bottom plate and a pre-interlacing device which is arranged on the bottom plate and used for allowing tows to enter, and a first tow adjusting assembly, a tow guide rod assembly, a second tow adjusting assembly, an SR1 roller and a GR1 roller are sequentially arranged on the bottom plate and located below the pre-interlacing device from top to bottom. According to the utility model, the tension at the GR1 position is increased and adjusted by accurately adjusting the relative positions of the three layers of adjusting brackets, and meanwhile, the tension deviation of each yarn can be reduced in the tension increasing process. By adding the scales on the adjusting rod, the tension of the same variety can be adjusted and controlled, the process recarving is realized, meanwhile, the tension adjustment is simplified, and the practicability and the simplicity of the device are improved.

The invention discloses a preparation method of an antibacterial moisture-permeable polyamide fiber and the antibacterial moisture-permeable polyamide fiber, and relates to the technical field of polyamide fibers. When the antibacterial moisture-permeable polyamide fiber is prepared, pretreated carbon nanotubes, ferric trichloride, sodium acetate trihydrate and diallyl disulfide are subjected to a microwave-assisted heating reaction, and carbon nanotube loaded nano iron sulfide is prepared; the preparation method comprises the following steps: modifying carbon nano tube loaded nano iron sulfide by using 3-aminopropyltriethoxysilane to prepare a modified carbon nano tube; mixing the modified carbon nanotubes and a nylon raw material, and performing melt spinning to obtain modified polyamide fibers; the modified polyamide fibers are modified with diethyl (3-aminopropyl) phosphate, 3-pyridylaldehyde and ethyl isocyano acetate, and flame-retardant modified polyamide fibers are prepared; and modifying the flame-retardant modified polyamide fiber with propane sultone to obtain the antibacterial moisture-permeable polyamide fiber. The prepared antibacterial moisture-permeable polyamide fiber has the advantages of being antibacterial, moisture-absorbing, antistatic, flame-retardant and high in tensile strength.

The invention discloses a polyamide fiber with conductivity and a preparation method thereof, the polyamide fiber is prepared from at least two polyamide melts through melt spinning, at least one polyamide melt contains conductive filler, the conductive filler comprises A-type conductive filler and B-type conductive filler, and the A-type conductive filler and the B-type conductive filler are arranged in the polyamide melts. The A-type conductive filler is a carbon-series conductive material, and the B-type conductive filler is selected from at least one of a polyether-polyamide block copolymer and a metal oxide. Two conductive filling materials are added into the polyamide fiber, through the synergistic effect of the two conductive filling materials, the fiber can be endowed with good conductive performance, and attenuation of the conductive performance of the polyamide conductive fiber in subsequent multiple processing procedures and a high-load use scene can be well controlled; the application of the composite material in complex working conditions such as electromagnetic shielding fabrics, intelligent clothing and special filter bags is facilitated.

The invention provides multifunctional composite fiber reinforced decorative base paper and a preparation method thereof. The decorative base paper is prepared from the following raw materials in parts by weight: 30-60 phr of wood pulp fibers, 15-35 phr of bamboo fibers, 1-10 phr of polyester fibers, 1-10 phr of polyamide fibers, 57-91 phr of an antibacterial reinforcing agent, 3-20 phr of a flame retardant and 1-10 phr of nano cellulose. The antibacterial reinforcing agent is prepared from the following components in parts by weight: 1 to 5 phr of silver nitrate, 3 to 10 phr of tetrabutyl titanate, 2 to 8 phr of sulfydryl modified chitosan, 50 to 70 phr of absolute ethyl alcohol and 2 to 6 phr of plant essential oil; the flame retardant is a composition of ammonium polyphosphate and aluminum hydroxide wrapped by chitosan. According to the invention, the composite fiber prepared by compounding four fibers is used, and the antibacterial agent, the flame retardant and the nano cellulose are added to supplement functionality, so that the multifunctional composite fiber reinforced decorative base paper with high strength, excellent wear resistance and excellent antibacterial performance is obtained, and the fireproof performance of the multifunctional composite fiber reinforced decorative base paper reaches the national B1-level fireproof standard.

The invention discloses a preparation method of a polyether block polyamide (PEBAX) fiber solid electrolyte membrane. The polyether block polyamide (PEBAX) fiber solid electrolyte membrane is formed by compounding polyether block polyamide fibers and solid electrolyte, the preparation method comprises the following steps: dispersing a solid electrolyte in a polyether block polyamide solution, preparing a polyether block polyamide-based solid electrolyte membrane by adopting an electrostatic spinning process, carrying out vacuum heat treatment, and rolling by a roller press to obtain the polyether block polyamide-based solid electrolyte membrane. The tensile strength, Young modulus, ionic conductivity and lithium ion transference number of the developed polyether block polyamide-based solid electrolyte membrane are improved, and the polyether block polyamide-based solid electrolyte membrane is expected to be applied to all-solid-state lithium ion batteries.

The invention discloses an elastic composite shielding cable for a ship and a preparation process thereof, and aims to solve the problems of poor environmental adaptability, low shielding effectiveness, insufficient elasticity and unstable process of an existing ship cable. The cable sequentially comprises a conductor layer, an insulating layer, a composite shielding layer and a sheath layer from inside to outside, wherein the conductor layer is formed by twisting a plurality of strands of superfine tinned oxygen-free annealed copper wires, and two 1500D aromatic polyamide fiber elastic cores are arranged in the center of the conductor layer; the insulating layer is made of ethylene propylene rubber or thermoplastic elastomer, and the dielectric constant is not more than 3.0; the composite shielding layer is of a double-layer structure of aluminum-plastic composite tape wrapping and tinned copper wire weaving, and the shielding effectiveness of the X wave band is larger than or equal to 30 dB. The sheath layer is of a chloroprene rubber or polyurethane double-layer structure, tests such as C5-M-grade salt mist are carried out, the preparation process comprises the steps of conductor twisting, insulation extrusion, composite shielding forming and the like, various parameters are accurately controlled, the bending radius of the cable is smaller than or equal to 6D, and the cable is stable in performance after being repeatedly bent for 1000 times, low in smoke, halogen-free, flame-retardant, adaptive to severe environments of ships, stable in process and high in reliability. And reliable operation of ship equipment can be ensured.

The present application relates to a kind of elastic wall phase change microcapsule-containing fiber and its preparation method and application, it relates to composite fiber field.Elastic wall phase change microcapsule-containing fiber includes fiber matrix, elastic wall phase change microcapsule, elastic wall microcapsule includes wall material, core material, wall material includes polyamide 66 / polyethylene glycol copolymer, the raw material of core material includes polyimide aerogel, polyethylene glycol phase change material.Elastic wall phase change microcapsule is contained in the fiber, can overcome the microcapsule used in the prior art phase change polyamide fiber difficult to deform, particle size size requirement is strict, in turn lead to core material is easily leaked, and the compatibility of the raw material of fiber matrix is poor.

The invention relates to the technical field of insulating paint, in particular to insulating paint capable of preventing bird damage and foreign matter lap joint and a preparation method of the insulating paint. The invention provides an insulating coating for preventing bird damage and foreign matter lap joint. The insulating coating is prepared from the following raw materials in parts by weight: 55 to 80 parts of methylsilane modified polyurethane liquid, 23 to 40 parts of polyamide fiber nano powder, 10 to 20 parts of organic silicon modified calcium lignosulphonate suspension, 8 to 10 parts of hydrophobic silicon dioxide, 2 to 5 parts of flatting agent, 1 to 2 parts of pigment, 3 to 5 parts of anti-aging agent and 10 to 15 parts of diluent. The insulating property of the coating is extremely high, the withstand voltage value per millimeter can reach 40kV and above, while the withstand voltage value per millimeter of a conventional insulating coating is generally 18kV; and the insulating paint is high in strength and good in toughness, and has good hydrophobicity and hydrophobicity migration.

The invention relates to the technical field of high polymer materials and synthetic fibers, and particularly discloses a high-wear-resistance polyamide fiber and a preparation method thereof. The fiber is prepared by taking polycaprolactam as a matrix, compounding spherical nano silicon carbide and molybdenum disulfide nanosheets as wear-resistant components, taking a maleic anhydride grafted hydrogenated styrene-ethylene-butadiene-styrene block copolymer as an interface compatilizer, and taking hyperbranched polyamide-amine as a dispersing agent. The polyester fiber is prepared through the processes of master batch preparation, melt spinning, multi-stage hot drafting and relaxation heat setting. Through the synergistic effect of all the components and the optimization process, the wear resistance of the fiber is remarkably improved, and meanwhile, the common problems of toughness reduction and fatigue resistance deterioration in high-wear-resistance modification are effectively solved. The polyamide fiber is tough and durable, is specially used for manufacturing high-safety-requirement products such as mountaineering ropes, rescue ropes and industrial lifting belts, and can reduce the fracture risk in repeated use and guarantee the use safety.

The invention discloses an antistatic flame-retardant fiber and a preparation method thereof, and relates to the technical field of functional textile materials. When the antistatic flame-retardant fiber is prepared, the multi-walled carbon nanotube is carboxylated to prepare the modified multi-walled carbon nanotube; carrying out surface free radical polymerization on the modified multi-walled carbon nanotubes and caprolactam to obtain modified polyamide 6 slices; the modified polyamide 6 is sliced and spun, and modified polyamide 6 fibers are prepared; the preparation method comprises the following steps: respectively reacting phytic acid and 2, 3-epoxypropyl trimethyl ammonium chloride with chitosan to prepare a polyanion / cation modified chitosan solution; the modified polyamide 6 fiber is alternately soaked in two modified chitosan solutions, and is treated by cocamidopropyl betaine to prepare the antistatic flame-retardant fiber. The antistatic flame-retardant fiber prepared by the invention has excellent antistatic property, flame retardance and mechanical strength.

The utility model discloses high-density polyester-nylon composite fiber cloth which comprises a first fabric layer and a second fabric layer which are composited. The first fabric layer is formed by interweaving polyester-polyamide composite fiber filaments serving as warp yarns and cool polyamide fiber filaments serving as weft yarns; the warp density of the first fabric layer is 700-800 pieces per 10 cm, and the weft density of the first fabric layer is 550-650 pieces per 10 cm; the second fabric layer is formed by interweaving antibacterial yarns serving as warp yarns and anti-mosquito yarns serving as weft yarns. Based on the high-density polyester-nylon composite fiber cloth, the high-density polyester-nylon composite fiber cloth is suitable for being used for manufacturing summer bedding fabrics, the first fabric layer is smooth and uniform in cloth cover and soft in texture, has a body touch cool feeling function endowed by cool feeling nylon, and is skin-friendly and comfortable; the second fabric layer has antibacterial and anti-mosquito effects, so that bacterium breeding of the fabric in the use process is reduced, and mosquito invasion to a user is avoided.

The application relates to the technical field of polyamide materials, and discloses a polyamide composite fiber and a preparation method and application thereof.The polyamide composite fiber comprises a first component and a second component, the first component is a polyamide 56 fiber, and the second component is other polyamide fibers, the other polyamide fibers are selected from at least one of a polyamide 6 fiber, a polyamide 66 fiber, a polyamide 510 fiber, a polyamide 511 fiber, a polyamide 512 fiber, a polyamide 610 fiber, a polyamide 611 fiber and a polyamide 612 fiber.The polyamide composite fiber provided by the application has the characteristics of double-color or multi-color effect, low shrinkage effect, high elastic fluffy, better mechanical properties and evenness of strip.

The utility model provides a pre-interlacing suction device for anti-ultraviolet polyamide 6 fiber, which is arranged on the rear side of a pre-interlacing device, the suction device comprises a mounting plate and a suction pipeline for sucking grease, the mounting plate is provided with a mounting hole, one end of the suction pipeline is communicated with the mounting hole, and the other end of the suction pipeline is communicated with the mounting plate. A filter assembly is arranged on the side, close to the pre-stitching device, of the mounting plate, is arranged at the mounting hole, and comprises a filter screen and a fixing unit for fixing the filter screen. According to the oil applying device, the filter screen is arranged at the tail end of the suction pipeline, so that the air circulation area is reduced, the suction force of the suction device is reduced, the suction force of the suction device is more uniform due to the arrangement of the filter screen, and the oil applying uniformity is improved. And meanwhile, the filter screen can also prevent sundries such as waste silk from being pumped into the suction pipeline.

Embodiments of the present invention replace at least some flame retardant fibers (e.g., aramid fibers) in wadding traditionally used for thermal insulation liners with thermally stable polyamide fibers (e.g., nylon fibers). The TPP performance of garments incorporating thermal liner embodiments encompassed herein is comparable to garments formed with conventional thermal liners, even without being improved.

This invention relates to the field of textile printing and dyeing, and discloses a high-colorfastness polyamide 56 fabric and its preparation method. The polyamide 56 fabric contains 70-100% polyamide 56 fiber and 0-30% spandex. The fabric has been dyed at least once, and the dye used for dyeing is a reactive dye. The polyamide 56 fabric dyed with reactive dyes of this invention has the advantages of higher dye uptake, wider pH adaptability, no need for large amounts of calcium salts for dyeing, and minimal or no use of color-fixing crosslinking agents.

An EPDM roofing membrane with improved hail resistance formed from a block of EPDM material with short aramid fibers added to the block of EPDM material at a concentration of 5 to 35 PHR, a weak alkaline accelerator added to the block of EPDM material at a concentration of 2 to 8 PHR, a thermoplastic elastomer added to the block of EPDM material at a concentration of 2 to 10 PHR, polysulfide silane added to the block of EPDM material at a concentration of 2 to 10 PHR; and a hemiaminal ether crosslinking agent added to the block of EPDM material at a concentration of 2 to 10 PHR.

This utility model discloses a moisture-wicking and breathable knitted sweater, comprising: a body and sleeves, which are connected by sewing; both the body and sleeves are made of moisture-wicking and breathable knitted fabric; the moisture-wicking and breathable knitted fabric is a loop-stitched structure woven from ground yarn and face yarn; the ground yarn includes moisture-wicking yarn and cooling yarn; the moisture-wicking yarn is U-shaped cross-section polyester filament; the face yarn is cationic dyeable UV-resistant polyamide 6 fiber yarn. Based on this utility model of moisture-wicking and breathable knitted sweater, the moisture-wicking and breathable knitted fabric used in the body and sleeves is a single-layer knitted fabric, which has better breathability compared to composite fabrics. Combined with the loop-stitched structure, the front of the sweater showcases the color and performance characteristics of the cationic dyeable UV-resistant polyamide 6 fiber yarn, while the reverse side exhibits moisture-wicking and cooling effects. When worn, the reverse side is close to the skin, which helps to quickly wick away sweat and adds a cooling sensation to the skin.