441 results about "Skin core" patented technology

The invention relates to a functional fiber and its manufacturing method, where the functional fiber has a skin-core structure, the weight ratio of skin to core 3/7 - 7/3; and the formula of the skin materials in weight percent comprises: skin polymer 91.6-97.6%, far infrared powder 2-8%, and coupling agent 0.1-0.4%; the skin polymer is one of PTT, PBT, PA-6, PET and PP with fusion index of 25-50; the coupling agent is one of gama-shink glycerol oxy propyl trimethoxy silane, gama-methyl propylene acyl oxy trimethoxy silane, N-beta-(amido ethyl)-gama amido propyl trimethoxy silane, and gama-amido propyl triethoxy silane; and the formula of the core-layer materials in weight percent comprises: core-layer polymer 88-99%, and flavor 1-12%; wherein the core-layer polymer is one of PE, PP and PET with melting point of 150-200 deg.C. The fiber of the invention has far infrared emissivity of 81-86%, very strong spicery and is a synthetic health functional fiber.

The invention relates to a making method of polyacrylonitrile carbon fiber, comprising: (1) mixing polyacrylonitrile and solvent according to the solid content of 0.1%-25% in a reactor, heating and stirring to completely dissolve the polyacrylonitrile and solvent; (2) after dissolving completely, adding KMnO4, then adding gas with oxide, processing pre-oxidation for the spinning solution; pre-oxidizing at temperature of 90-250 DEG C for 1-2h; reaching different pre-oxidation effect under different pre-oxidation temperatures and different pre-oxidation time; (3) spinning the spinning solution in the step (2) in a spinning machine, then obtaining pre-oxidation filaments with good pre-oxidation degree after water washing, drafting and heat forming; then obtaining high-property carbon fiber through carbonization. The method in the invention carries out innovation for pre-oxidation stage of carbon fiber with convenient operation, simple equipment but rarely pollution for the environment; low-cost controllable pre-oxidation of polyacrylonitrile is implemented and the skin-core structures are reduced, thereby being capable of producing high-property carbon fiber; and the preparation method greatly reduces the production cost of carbon fiber.

The invention discloses a coaxial centrifugal spinning device and method. The device comprises a direct-current motor, a supporting device, a spinning support, coaxial centrifuge tubes, spinning needle heads and a receiving device, wherein the direct-current motor is fixed to the supporting device, the spinning support is directly and fixedly connected with an output shaft of the direct-current motor, the coaxial centrifuge tubes are fixed to the spinning support, and under the action of the direct-current motor, the spinning support drives the coaxial centrifuge tubes to rotate at high speed; each coaxial centrifuge tube comprises an outer layer centrifuge tube and an inner layer centrifuge tube, each spinning needle head comprises an outer layer needle head and an inner layer needle head, during spinning, a spinning solution or melt in the outer layer centrifuge tubes and the inner layer centrifuge tubes is tossed out under the action of centrifuge force, an outer layer solution wraps an inner layer solution, and superfine fiber of a skin-core structure is formed due to centrifuge force drafting, solvent volatilization and phase separation. The coaxial centrifugal spinning device is simple, high in spinning speed and production efficiency and capable of producing coaxial superfine fiber on a large scale.

The invention discloses polyester composite fiber and a method for producing the same. The polyester composite fiber adopts the skin-core composite structure, wherein the ratio of weight percent of the skin to the weight percent of the core is 50:50 to 90:10. The polymer in the core is alkali soluble copolyester. The length of the arc of the exposed part of the core on the cross section of the polyester composite fiber is 5-20 percent of the outer circumference of the polyester composite fiber. The thickness of the wall of the skin is 5-20 micron. The method for producing the polyester composite fiber comprises the steps of preparing original filament, preparing deformed filament or preparing extended filament. The fiber of the invention is prepared to fabric after post processing and is subjected to deweighting in the sodium hydroxide solution, the processed polyester composite fiber can keep the strength of more than 95 percent and the complete C-section so that the fabric has light weight, good heat preservation performance and good moisture adsorption and perspiration elimination performance.

The invention relates to a filament low-melting-point polyester fiber and a preparation method thereof. The filament low-melting-point polyester fiber is in a skin-core structure, a skin layer is made of low-melting-point polyester; a core layer is made of PET (polyethylene terephthalate); the low-melting-point polyester consists of a terephthalic acid chain segment, an isophthalic acid chain segment, an ethylene glycol chain segment, a diethylene glycol chain segment, a molecular weight modifier chain segment and a 1, 12-Dodecanediol chain segment containing branched chains; a molecular weight modifier corresponding to the molecular weight modifier chain segment is specifically a monoacid series or a diacid series; the preparation method of the filament low-melting-point polyester fiber comprises the following steps: polymerization of the low-melting-point polyester and skin-core composite spinning, so as to obtain the filament low-melting-point polyester fiber. The prepared filament low-melting-point polyester fiber has the advantages that the initial melting point is reduced, the melting speed is increased, the polyester fiber is immediately melted at the corresponding temperature, and the melting effect is good.

The invention relates to a skin-core composite electromagnetic shielding fiber and a preparation method thereof, particularly a skin-core composite structure electromagnetic shielding fiber comprising polymers and low-melting-point metal and a melt composite spinning method thereof. The skin-core composite electromagnetic shielding fiber provided by the invention comprises a skin layer and a corelayer, wherein the skin layer is made of thermoplastic resin, and the core layer is made of a mixture of low-melting-point metal and/or alloy and a coupling agent; and the skin layer and the core layer are respectively a continuous phase. The invention also provides a preparation method of the skin-core composite electromagnetic shielding fiber, which comprises the steps of pretreatment of low-melting-point metal and/or alloy, and skin-core composite melt extrusion. The shell fabric woven from the skin-core composite electromagnetic shielding fiber can effectively shield the interference of electromagnetic waves on human bodies, thereby inhibiting the harm of electromagnetic wave radiation to people.

The present invention discloses a polymer composite function fibers containing partial graphene, and a preparation method thereof. The fibers comprise a component A and a component B, wherein the component A and the component B are combined in a partial exposing manner, side-by-side manner or skin-core manner, and 20-100% of the outer area of each fiber is the component B. The method comprises: crystallizing a polyester containing 0.1-1 wt% of partial reducing graphene and a polyester containing 4-20 wt% of a nanometer composite filler containing partial reducing graphene and TiO2, drying, carrying out melt composite spinning, and carrying out drawing and relaxation heat setting at a temperature of 80-160 DEG C, and reducing the partial graphene in the fibers to achieve the carbon/oxygen atom ratio of 9/1-15/1 through the reducing treatment. According to the present invention, the prepared fibers can be produced at the high spinning speed, and the production efficiency is high; and the fibers have characteristics of low single fineness, high strength and lower resistivity, meets the antistatic requirement, and further has characteristics of anti-bacterial property and flame retardant property so as to provide good application prospects.

The invention provides a skin core composite fiber, a manufacturing method thereof and a fabric. The skin core composite fiber is formed by composing a skin layer made of polyamide and a core layer made of polyester and satisfies the following properties: (1) 0.6g/d <fiber fracture strength <2.5g/d; (2) 15% <fiber fracture elongation rate <50%; (3) 6g/d <fiber modulus 0-5% (Mod0-5%) <40g/d; wherein Mod0-5% = (strength at fiber elongation 5%)/(0.05).

The invention relates to a processing method of separating a cotton stalk skin from a cotton stalk core mechanically as well as special equipment. Firstly, the cross section of a cotton stalk is squeezed to be of a flatly cracked shape and caused to present a continuous shape along the longitude direction; secondly, the flatly-cracked cotton stalk is struck every a certain length to be bent 85 to 90 degrees rapidly, thus leaving the skin separated from the core preliminarily. A free high-frequency strike is conducted to the strap-shaped cotton stalk skin to remove the broken core residue; and finally, the strap-shaped cotton stalk skin is conducted a cross free strike with a frequency higher than the frequency in the second step to eliminate the remaining attached core residue and obtain an eligible cotton stalk skin. The special equipment consists of a squeezing device, a vertical striking device, a diverted striking and skin separating device together with a wallboard and a stand that are used for fixing the devices and all the devices are arranged in sequence. The mandrel of each device is arranged in parallel, supported and fixed by the wallboard and driven by a drive mechanism. The special equipment can realize a mechanical separation of a cotton stalk skin from a cotton stalk core. The processed cotton stalk skin takes the shape of a continuous strap and can be processed further. The processed cotton stalk core takes the shape of millimeter-level crumbs and is an excellent material for pulping and paper making.

Discloses skin and interior core structures made shape-adjustable with a layer of skin core forming a pre-molded perimeter rail; exterior structural skin can be molded using a convex shape-defining mold to produce a plurality of different shapes; separate subparts give the mold the capacity to describe different curves and modify different parameters of the board's design. Mold is reversible; male/female configurations produce convex shape-defining substrates allowing a wide array of different shapes. Board is fabricated without use of any concave shape-defining surface, and therefore without the high manufacturing costs and structural problems of prior art female molds.

The invention provides a novel weaving idea of a negative ion fiber fabric and process, which takes polyester fibers such as polyester as a vector to spin, wherein 2-6 percent of nano negative ion power, 15-45 percent of compound negative ion power which is crashed, 0.5-2.6 percent of coupling agent such as JH-S69 type silane coupling agent, 0.3-1.8 percent of dispersant such as low molecular weight polyethylene wax and ethylene copolymer are uniformly mixed and blended into the polyester fibers to be kneaded, granulated and dried, and then being extruded to spin into a skin-core structure with the polyester fibers or polyamide fiber according to the rate of 40:60-60:40 through a twin-screw, after being stretched for 1.5-2.6 times, the skin-core structure is spun, and the function release amount is happened at 5000-30000 ind/cubic centimeter. The negative ion fiber fabric has lasting negative air ions and strong far infrared launching functions and has excellent antibacterial bactericidal functions, the processing technology is simple, the weaving effect is high, and the production value of products is increased.

A mold and construction method for forming aquatic sports boards is provided. The method and molds provide skin and interior core structures made shape-adjustable by a pre-molded perimeter rail. Division(s) in the structural exterior skin allow the skin core to be trimmed and bonded to a variety of convex, shape-defining core structures to produce a plurality of different shapes. A reusable shape-defining mold allows the board structure to be modified in shape. The mold is reversible and male/female configurations produce convex, shape-defining board substrates for a wide array of custom designs.

The production process of continuously preparing SiC fibre includes the following steps: dissolving high-molecular polymer in solvent to prepare skin solution, dissolving or dispersing the dispersingagent, high-molecular polymer, SiC powder and sintering adjuvant into solvent to prepare core solution, extruding skin solution and core solution from microhole of skin-core composite spinning component under the pressure to make skin solution cover exterior of the core solution, using wet process or dry process to solidifying fluid-flow wire, drawing, drying and winding so as to obtain raw fibre, its core portion is ceramic powder adhered by polymer and its skin portion is made of pure high-molecular material.

A method is disclosed utilizing off the shelf constant cross section thickness sandwich panels comprised of Fiber Reinforced Thermoplastic (FRTP) resin skins and low density thermoplastic (TP) core material wherein the steps of selectively and controllably exposing the panels to heat and incrementally thermoforming the skin-core into a consolidated composite edge or intra-panel area in consideration of subsequent mating and attachment of the FRTP sandwich panel to other structures is achieved. The exact configuration of articles so thermoformed is design optimized to overcome manufacturing, assembly, weight, in-service and structural performance shortcomings of prior art and FRP sandwich panel structures. Further disclosed is an improved, load-bearing, modular design container structure assembled from such thermoformed FRTP sandwich panels in which is utilized the unique core-skin edge configuration of the present invention in consideration of improved: load bearing performance, useful load volume, reduced manufacturing costs, structural weight savings, impact and damage tolerance and repair and replace issues.

The invention relates to a high-efficiency antibacterial mildew-proof PLA (poly lactic acid) fiber which is a skin-core structure and a preparation method thereof. The PLA fiber comprises a skin layer and a core layer, wherein the skin layer comprises PLA resin, an antibacterial agent, a mildew preventive, a plasticizer, a compatilizer and a dispersing agent; and the core layer comprises PLA resin. The preparation method of the high-efficiency antibacterial mildew-proof PLA fiber comprises the steps of: (1) mixing the PLA resin, the antibacterial agent, the mildew preventive, the plasticizer, the compatilizer and the dispersing agent, and then melting and blending the mixture to obtain dried blend chips; and (2) using the dried blend chips as the skin layer, using the PLA resin as the core layer, and obtaining the high-efficiency antibacterial mildew-proof PLA fiber through melting spinning, winding, drafting. The PLA fiber disclosed by the invention has high strength, good flexibility and obvious antibacterial and mildew-proof effect, can be biodegraded, and has broad application prospect; and the preparation method disclosed by the invention is simple, has low cost and low requirement on the equipment, and is suitable for mass production.

The invention discloses a preparation method of a lignin base skin core structure nanometer/micron fiber. The preparation method comprises the following steps: (1) by mass, adding one part of mixture of lignin and petroleum base macromolecules into 1-20 parts of organic solvents, and obtaining a lignin mixing solution after evenly mixing and fully dissolving the mixture; adding 1 part of natural or synthetic macromolecules into 4-25 parts of solvents, and obtaining a macromolecule solution after evenly mixing and fully dissolving the natural or synthetic macromolecules; and (2)performing coaxial electric spinning, leading the lignin mixing solution and the macromolecule solution respectively into two layers of a coaxial needle head, and obtaining the lignin base skin core structure nanometer/micron fiber under the effects of 5-100kV high-voltage electrostatic field when the solutions are stably extruded out of the coaxial needle head. The preparation method is simple and moderate in conditions, reduces degree of diffusion of the lignin towards a skin layer simultaneously, and improves continuity and evenness of a core layer material in the fiber.

The invention relates to a core-shift double-component compound fiber and the preparing method for the fiber. The compound fiber comprises long or short fiber spun from a core-shift and skin-core structure taking PPS (Poly Phenylene Sulfide) as the covering layer and PET (polyester), PBT, PA6 (polyamide) or PB66 (polyamide) as core layer; the preparing includes (1) vacuum drying, (2) double-component spinning and winding, (3) after tensioning and thermal shaping. The compound fiber is of excellent bulkiness and usability for long term, and low cost; can be used widely in the environmental protection field after being made into fiber filtering material.

The invention relates to a preparation method of regenerative silk protein fiber with skin-core structure, comprising the following steps: (1) silkworm cocoon is degummed and is dissolved in LiBr solution, a multi-wall carbon nano tube, a single-wall carbon nano tube or carbon black is added to obtain the solution with 20-35 percent of concentration; (2) sericin powder is prepared into the solution with 50-70 percent of concentration; (3) the solution is respectively poured into an inner pipe and an outer pipe of a coaxial spinning nozzle to carry out coaxial electrostatic spinning. The preparation method is simple, the operation is convenient, the cost is low, the method has no pollution to environment, and the obtained regenerative silk protein fiber has similar composition and skin-core structure with the natural silk.

The invention relates to a cool flame-retardant recycled polyester filament fiber and a production method thereof. The filament fiber is of a skin-core structure, a skin layer is obtained by melt spinning of cool master batch and a recycled polyester chip, and the addition amount of the cool master batch is 5wt%-10wt%; a core layer is obtained by melt spinning of flame-retardant master batch and a recycled polyester chip, and the addition amount of the flame-retardant master batch is 20wt%-30wt%; the cool master batch is obtained by blending granulation of cool powder and a recycled polyester chip in the mass ratio of (15%-25%) to (85%-75%); the cool powder is obtained by mixing of flaky jade, zinc oxide and titanium dioxide in the mass ratio of (50%-60%) to (10%-20%) to (40%-20%); the flame-retardant master batch is obtained by blending granulation of a flame retardant and a recycled polyester chip in the mass ratio of (25%-35%) to (75%-65%); the flame retardant is one or more of melamine, melamine cyanurate, triphenyl phosphate and polysulfonyldiphenylene phenyl phosphonate. The cool flame-retardant recycled polyester filament fiber has a cool property and a flame-retardant property and the spinnability and the functionality of the fiber are guaranteed at the same time.

The invention discloses a high-heat-resistance skin-core structural polylactic acid (PLA) fiber and a preparation method thereof. The core layer of the skin-core structural PLA fiber is stereocomplex polylactic acid (scPLA), and the skin layer is PLA with the L-lactic acid structural unit (D-LA) content of 0 to 5 mol percent. The preparation method of the skin-core structural PLA fiber comprises the following steps: after raw materials are dried, adding the raw materials into corresponding hoppers of a composite spinning machine respectively, and carrying out melt conveying, spinning, blowing cooling, winding feeding, oil bath stretching, steam bath stretching, tension heat setting, oiling, stacking, curling, relaxation and cutting to prepare skin-core structural PLA short fiber; or after the raw materials are dried, adding the raw materials into the corresponding hoppers of the composite spinning machine respectively, and carrying out one step method of melt spinning, side blowing cooling, oiling, stretching and heat setting to prepare skin-core structural multifilaments. The prepared skin-core structural PLA fiber is relatively high in heat resistance, and can be used in the fields of textiles, composite materials and the like.

The invention discloses a skin-core structured polyurethane elastic fiber preparation method. By adjustment of types and contents of skin and core layer spinning solution auxiliary agents, the auxiliary agents are enriched on a skin layer, and improvement of fiber environmental tolerance, changing of fiber surface properties and reduction of auxiliary agent utilization cost are realized. Skin-corestructured polyurethane elastic fiber preparation is characterized by including steps: 1) preparing N,N-dimethylacetamide solution of polyurethane-polyurea, aging to obtain core layer spinning solution, adopting a spinneret plate for spin stretching, and performing high-temperature drying through a first passage to obtain core layer polyurethane elastic fibers; 2) taking part of polyurethane-polyurea solution, and adding auxiliary agents for improvement of fiber environmental tolerance or changing of fiber surface properties to obtain skin layer spinning solution, coating the core layer fibersurface with the skin layer spinning solution through a special-structure coating device, performing high-temperature drying through a second passage, and carrying out oiling and winding forming to obtain skin-core structured polyurethane elastic fibers.

The invention discloses an antibacterial ES composite short fiber used for a surface layer of a hot-air non-woven fabric. The ES composite short fiber has a skin-core structure, that is, the fiber iscomposed of a core layer and a skin layer; the core layer is prepared from, by weight, 90-97 parts of polypropylene and 2-5 parts of an ethylene-propylene copolymer; the skin layer is prepared from, by weight, 85-95 parts of polyethylene, 5-7.5 parts of methyl methacrylate graft modification polyethylene, 3-6 parts of an ethylene-propylene copolymer and 6-9 parts of a composite antibacterial agent; the composite antibacterial agent is prepared from, by weight, 70-85 parts of chitosan-grafted sodium polyacrylate super absorbent resin, 70-85 parts of a crylic acid-2-acrylamide-2-methyl propanesulfonic acid copolymer, 25-37 parts of silver nitrate and 5-9 parts of nanometer silver. The antibacterial ES composite short fiber used for the surface layer of the hot-air non-woven fabric is high inantibacterial efficiency and has a lasting antibacterial effect, and the prepared surface layer of the hot-air non-woven fabric is good in softness and texture, high in longitudinal and transverse strength and durable.

The invention relates to a long-acting controlled-release sheath-core type aromatic filament. A preparative technology for the long-acting controlled-release sheath-core type aromatic filament comprises the following steps of: respectively feeding materials into to sheath-core spinneret plate components by using two screw extruders, wherein the components of a sheath-layer are polyester and water-solubility polyester, and the components of a core layer are polypropylene and aromatic; fusing and compounding spun yarns according to certain proportions, and preparing the sheath-core type compounded filament after carrying out a post-processing technology on the spun yarns. A textile manufactured by the aromatic filament with the skin-core structure prepared by the method only needs to be processed by aqueous alkali so that lots of grooves, micropores and through holes can be formed on the surfaces of fibers, the fragrance of the aromatic is slowly and outwardsemitted through the through holes of the sheath-layer, thereby the long-acting controlled-release effect is achieved; and the long-acting controlled-release sheath-core type aromatic filament can be widely applied to the field of spinning clothes.

The invention discloses a phase-change energy-storing fiber. The phase-change energy-storing fiber is of a skin-core structure which comprises a skin layer and a core layer, wherein a skin layer raw material is a thermoplastic polymer; and a core layer raw material is a mixture of the thermoplastic polymer, clay mineral powder and a phase-change material. A preparation method of the phase-change energy-storing fiber comprises the following steps: (1) weighing 2-20 parts of the phase-change material and 5-20 parts of the clay mineral powder in parts by weight, uniformly mixing the weighed phase-change material and clay mineral powder by virtue of ultrasonic oscillation under a vacuum condition, putting the mixture into a vacuum oven so as to obtain a composite phase-change material, and uniformly mixing 60-90 parts of thermoplastic polymer with the prepared composite phase-change material, so as to obtain the core layer raw material; and (2) carrying out melt spinning on the thermoplastic polymer, as skin layer raw material, and the core layer raw material by virtue of a compound spinning machine, so as to obtain the phase-change energy-storing fiber being of the skin-core structure. The preparation method is simple and low in cost, and the prepared phase-change energy-storing fiber has large phase-change enthalpy and a uniform temperature regulation effect.

Core assemblies for manufacturing airfoils and airfoils made therefrom having an aft flowing serpentine hybrid skin core positioned relative to a plurality of core bodies and configured to define at least one serpentine cavity within the manufactured airfoil. The aft flowing serpentine hybrid skin core extends from a root region toward a tip region in a radial direction of the manufactured airfoil and the plurality of core bodies are positioned about the aft flowing serpentine hybrid skin core to form a shielding structure to thermally shield the aft flowing serpentine hybrid skin core in the manufactured airfoil.