38results about "Flash-spinning methods" patented technology

The invention relates to a flash evaporation material with a high transmission-reflection ratio, which is characterized in that the raw material of the flash evaporation material comprises polyethylene; the Frazier air permeability of the flash evaporation material is 0.45-0.85 m < 3 > / (min.m < 2 >); the transflective ratio of the flash evaporation material is 2-7m < 3 > / (min.m < 2 >. Mm), and the transflective ratio is equal to (Frazier air permeability. Reflectivity) / thickness. Through comprehensive regulation and control and balance of four groups of core parameters including the solvent ratio, the spinning parameters, the web forming speed and the hot rolling process, part of performance pain points in the prior art are solved, and the design requirement for the proper transflective ratio is met.

The invention relates to a flash evaporation material with high transparent strength and a preparation method thereof, the flash evaporation material comprises the following raw materials: polyethylene with high transparent strength of 0.2-3 kN / m; the high-permeability strength is equal to the moisture permeability index * the longitudinal tensile strength; the test standard of the tensile strength is a constant-speed tensile method for testing the tensile strength of paper and paperboards according to GBT 12914-2018; the test standard of the moisture permeability index is GB / T 11048-2018 determination of thermal resistance and moisture resistance (evaporation hot plate method) under the physiological comfort steady state condition of the textile. The flash evaporation material disclosed by the invention has relatively good high-transmittance strength.

The present invention relates (i) to a spin fluid for flash spinning a polyethylene or a polyethylene blend comprising an azeotropic or azeotrope-like composition comprising (a) trans-1,2-dichloroethylene and 1H,1H,2H-heptafluorocyclopentane, or (b) trans-1,2-dichloro-ethylene, 1H,1H,2H-heptafluorocyclopentane, and 2H,3H-decafluoropentane, and (ii) to a process for the preparation of plexifilamentary fibrils of polyethylene or polyethylene blend using the spin fluid.

The present disclosure provides a system and method for producing nanofibers. The system includes an automated track system including a first track having a first face; and a second track having a second face facing the first face of the first track. The first track and the second track are positioned to define a proximal gap and a distal gap. The first track and the second track are adapted and configured to transfer a nanofiber coupled to the first face and the second face from the proximal gap to the distal gap. The system also includes a roving belt that is positioned to be partially disposed within the distal gap and is adapted and configured to decouple the nanofiber from the first face and the second face.

The utility model discloses an adjustable electrostatic flash spinning receiving device, which relates to the field of electrostatic flash spinning and comprises a winding roller, two sliding rings are arranged on the outer side of the winding roller in a relatively sliding manner, cleaning mechanisms are arranged on the sides, far away from each other, of the two sliding rings, each cleaning mechanism comprises a fixing plate, and the fixing plates are arranged on the winding roller. The two fixing plates are fixed to the sides, away from each other, of the two sliding rings respectively, cleaning brushes are fixed to the bottom ends of the two fixing plates, and the bottom ends of the cleaning brushes are attached to the outer surface of the winding roller. And the two connecting plates can drive the corresponding sliding rings to get close to each other or get away from each other. Therefore, the wound spun yarn is fixed between the two sliding rings, and the distance of the winding area of the spun yarn can be expanded or shortened according to needs.

The utility model discloses a charging system for flash spinning equipment, which comprises a storage tank, a solvent filling pipe is fixedly arranged at the upper end of the storage tank, a solid material filling pipe is arranged on one side of the solvent filling pipe at the upper end of the storage tank, and a stirring mechanism for stirring and mixing materials is arranged in the storage tank. The stirring mechanism comprises a first transmission rod, a connecting rod, a second transmission rod, a stirring rod, a connecting bin and a connecting pipe, and the first transmission rod is movably arranged in the middle of the inner side of the storage tank through a bearing. The flash spinning device is good in using effect, the traditional mode that flash spinning solvent is added from one side is changed into the mode that the solvent is added in the middle of the storage tank through the extension pipe, so that the solvent is injected from the center of the storage tank and can be rapidly diffused to the periphery to form radial symmetrical flow, the flow mode better conforms to the situation that the solvent is thrown out through stirring, dead zones can be reduced, and the service life of the flash spinning device is prolonged. The polymer particles are more fully contacted with the solvent, and the mixing time is shortened.

A flash fabric having a high tensile resilience, including the polyethylene raw material. The gram weight G of the flash fabric is greater than 35 g / m2; the tensile resilience (RT) of the flash fabric is 40%-70%; and the aging toughness Z5 of the flash fabric is 5-15 (N-m) / g, where Z5=[RM5×EM5+RT5×ET5] / G. By means of improvements of the spinning raw materials and the process, the comprehensive performance of the product is improved.

This product provides a protective wrap that improves energy efficiency and provides protection against air intrusion and moisture buildup within buildings. [Solution] 0.002~0.2(m 3 / m 2 A sheet having a plexifilamentous structure with a standardized fragile permeability of .min @ 50gsm and a standardized water head of 150-250 cm @ 50gsm.

The present invention relates to (i) azeotrope-like compositions comprising dichloromethane, 1H,1H,2H-heptafluorocyclopentane, and a hydrofluorocarbon (HFC) with 4 to 6 carbon atoms, (ii) a spin fluid for flash spinning comprising this azeotrope-like composition and a polyolefin, and (iii) a process for the preparation of plexifilamentary fibrils of polyolefins using the spin fluid.

The utility model discloses a collecting device for flash spinning equipment, which comprises a support frame, a winding mechanism convenient for winding spinning is arranged on the support frame, and an adjusting mechanism convenient for adjusting the winding position is arranged on one side of the support frame. When the motor is started, the rotating disc is driven to rotate, the fixed rod is driven to rotate along with the rotating disc, the piston block is pushed by the connecting arm and the movable rod to move repeatedly along the interior of the first hollow rod, when air in the first hollow rod is extruded to enter the interior of the second hollow rod, the piston rod is extruded to drive the sliding block to move along the groove body; when air is sucked into the first hollow rod, the piston rod resets along the second hollow rod and drives the sliding block to reset, so that the sliding block moves repeatedly, the spun yarn penetrates through the penetrating hole and then is wound on the outer side of the winding roller, the winding point can be adjusted by moving the sliding block, the spun yarn can be evenly wound on the outer side of the winding roller conveniently, and the space on the outer side of the winding roller is fully utilized conveniently.

The present invention relates to (i) a spin fluid for flash spinning comprising (a) at least one polyolefin, and (b) a spin agent comprising at least one monofluorohydrocarbon with 4 to 5 carbon atoms, and (ii) a process for the preparation of plexifilamentary fibrils of polyolefins using the spin fluid.

A flash fabric having a high tensile resilience, including the polyethylene raw material. The gram weight G of the flash fabric is greater than 35 g / m2; the tensile resilience (RT) of the flash fabric is 40%-70%; and the aging toughness Z5 of the flash fabric is 5-15 (N·m) / g, where Z5=[RM5×EM5+RT5×ET5] / G. By means of improvements of the spinning raw materials and the process, the comprehensive performance of the product is improved.

This application relates to the field of flash spinning equipment technology, and discloses a connecting device and a flash spinning equipment. The flash spinning equipment includes a control system, a mixing device, a nozzle assembly, and a connecting device. The connecting device includes a heating mechanism and a connecting pipeline. The connecting pipeline includes multiple connecting pipes and multiple adapters. Any two adjacent connecting pipes are connected through the adapters. By adopting the above technical solution, multiple output ends of the mixing device can be separately connected to multiple spinning nozzles through the connecting pipeline of the connecting device. This arrangement not only facilitates the adjustment and maintenance of the connecting pipeline when problems occur, but also allows for the adjustment of the extension route of the connecting pipeline according to environmental adaptability, reducing the occupied area.

This application discloses a white polyethylene fiber membrane and its preparation method, belonging to the field of polymer materials technology. The product described in this application introduces a specific resin system together with modified titanium dioxide as the basic component, and at the same time limits the ratio of fineness to specific surface area of ​​the flash-spun fiber after preparation, so that the product will not show obvious "powdering" phenomenon after friction while ensuring sufficient wear resistance. At the same time, the product has excellent air permeability and water permeability.

The present invention relates to (i) a bonded sheet of non-woven flash spun plexiform fibrils exhibiting high liquid barrier properties, a high level of airtightness, a high degree of softness and good mechanical strength; (ii) a process for preparing a bonded sheet of non-woven flash spun plexiform fibrils; and (iii) multilayer sheet structures and articles comprising a bonded sheet of non-woven flash spun plexiform fibrils.

To provide a device provided with one or more nozzles including a tubular fiber spinning needle and a method that uses a wide range of synthetic polymers and biopolymers for manufacturing harmless polymer fibers and microfibrous and nanofibrous polymer materials made therefrom on a small to large scale.SOLUTION: The device and the method of this invention enable safe and continuous inline manufacturing of a polymer fiber at a high fiber-manufacturing rate and with high energy efficiency. A higher polymer fiber-manufacturing rate can be realized by at least one nozzle 100 that can generate a centrifugal force applied to a tubular fiber spinning needle 110, the force effecting a rotary movement of the tubular fiber spinning needle 110 and a higher polymer injection rate per nozzle.SELECTED DRAWING: Figure 1

This invention relates to a polyethylene flash nonwoven fabric, characterized by a wet tensile strength of 1600–2400 N / m, a wet tensile strength retention rate of 0.55–0.70, an opacity of 0.85–0.95, and a basis weight of 35–45 g / m². 2 The wet-soaking process conditions for the samples were as follows: first, the water temperature for wet-soaking was 40℃, and the soaking time was 8 hours; second, the temperature was raised to 60℃, and the soaking time was 8 hours. This application exhibits good wet tensile strength and wet tensile strength retention rate, and has wide applications.

This application provides a manufacturing process for a high water-pressure resistant polyethylene nonwoven fabric, relating to the field of textile fabric technology. This application utilizes waste high-density polyethylene plastic blended with carboxymethyl cellulose derivatives to produce polyethylene paper via flash evaporation. This polyethylene paper exhibits excellent waterproof and breathable properties. Then, a PUR moisture-curing hot melt adhesive is used to composite woven synthetic fiber fabric with the polyethylene paper and nylon warp-knitted fabric to prepare a high water-pressure resistant fabric. This fabric not only possesses good waterproof and breathable properties but also exhibits excellent washability and comfortable wear.

An easy-print packaging sheet and a manufacturing method therefor. Raw materials of the easy-print packaging sheet contain polyethylene; the smoothness of the packaging sheet is 70-250 seconds; the drape coefficient of the packaging sheet is 78-92%; the burst index of the packaging sheet is 8-15 kPa·m2 / g; and the light shielding rate of the packaging sheet is 85-95%. The packaging sheet having good comprehensive performance is prepared by means of a flash spinning process and the improvement of raw materials and a spinning process.

The present invention relates to (i) an azeotropic or azeotrope-like composition comprising (1) dichloromethane and 1H,4H-octafluorobutane, or comprising (2) dichloromethane and 1-methoxynonafluorobutane, or comprising (3) dichloromethane and 1‑ethoxynonafluorobutane, (ii) a spin fluid for flash spinning comprising these azeotropic or azeotrope-like compositions and a polyolefin, and (iii) a process for the preparation of plexifilamentary fibrils of polyolefins using the spin fluid.

The present invention relates to (i) a bonded sheet of nonwoven flash-spun plexifilamentary fibrils exhibiting high liquid barrier properties, a high level of air-tightness, a high degree of softness, and good mechanical strength, (ii) a process for the preparation of a bonded sheet of nonwoven flash-spun plexifilamentary fibrils, and (iii) a multilayer sheet structure and an article comprising the bonded sheet of nonwoven flash-spun plexifilamentary fibrils.

The application relates to the technical field of chemical fiber production, and discloses a method for preparing high-performance aramid fiber through low-temperature drafting, which comprises the following steps: adding a temporary toughening agent into an aromatic polyamide solution and stirring to obtain a spinning solution, passing through a spinneret, entering a coagulation bath and a washing bath in sequence after passing through an air layer to obtain a nascent fiber; and then drafting, heat-drawing and heat-setting to obtain aramid fiber. Through the introduction of a specific temporary toughening agent into the aromatic polyamide spinning solution, the good mutual solubility of the temporary toughening agent with a spinning solvent and the plasticizing effect on the fiber are utilized, high-multiple drafting of aramid fiber at low temperature is successfully realized, the bottleneck of traditional process technology is broken, the prepared aramid fiber has excellent comprehensive performance, and the aramid fiber has important industrial application value and market prospect.

This invention relates to a flash material with high permeability-to-weight ratio, characterized in that the raw material of the flash material contains polyethylene; the Fraser permeability of the flash material is 0.45–0.85 μm. 3 / (min·m 2 The permeability-to-reflectance ratio of flash evaporation materials is 2–7 m. 3 / (min·m 2 Transparency-to-reflectance ratio = (Fraser air permeability · reflectivity) / thickness. This application addresses some performance pain points of existing technologies by comprehensively controlling and balancing four core parameters: solvent ratio, spinning parameters, web forming speed, and hot rolling process, in order to achieve a more suitable transmission-to-reflectance ratio design requirement.

The present invention relates to (i) a thermally bonded sheet of nonwoven flash-spun plexifilamentary fibrils exhibiting high tensile strength and a high degree of softness, (ii) a process for the preparation of a bonded sheet of nonwoven flash-spun plexifilamentary fibrils, and (iii) a multilayer sheet structure and an article comprising the bonded sheet of nonwoven flash-spun plexifilamentary fibrils.

The present application relates to a kind of mildew-proof polyethylene fabrics and its production method and application, raw material includes polyethylene, the ratio of cold shrink strength and heat shrink strength is 2:1~6:1;Cold shrink strength is 2.5~5.5N / mm 2 ;Mildew-proof grade of mildew-proof polyethylene fabric is less than 3 levels.This application can significantly improve the antifungal and antibacterial function of the product by adding copper-zinc-doped nano titanium nitride modifier;Mechanical properties are also improved, and its application range is expanded.

This product provides a protective wrap that improves energy efficiency and provides protection against air intrusion and moisture buildup within buildings. [Solution] 0.002~0.2(m 3 / m 2 A sheet having a plexifilamentous structure with a standardized fragile permeability of .min @ 50gsm and a standardized water head of 150-250 cm @ 50gsm.

This invention provides a flash-spun fiber yarn, a composite yarn, its preparation method, and its application, relating to the field of textile materials. The preparation method of the flash-spun fiber yarn includes: adding a fiber-forming polymer, a main solvent, and a secondary solvent to a flash evaporation reactor, continuously stirring and heating to fully dissolve the fiber-forming polymer, forming a homogeneous spinning solution; flash spinning the spinning solution, receiving the fibers ejected from the spinneret of the flash evaporation reactor, and separating the fibers simultaneously or after receiving them to obtain single bundles of flash-spun fibers; and optionally, twisting at least one bundle of single bundles of flash-spun fibers. This invention provides a method for preparing flash-spun fiber yarn, breaking the limitation that flash spinning technology can only be used to prepare nonwoven fabrics. It allows the obtained single bundles of flash-spun fibers to be used directly as yarn, or twisted into yarn, achieving efficient, continuous, and large-scale preparation from polymer raw materials to high-performance yarns.

The invention provides a polylactic acid fiber and a preparation method thereof, and a preparation method of a polylactic acid non-woven fabric, and belongs to the field of flash spinning. According to the method, a high-density polylactic acid powder, solvent and solid dry ice reaction system is constructed, through dry ice temperature control and reaction environment control, the evaporation efficiency of the solvent is improved, and the solvent and the solid dry ice can react at normal temperature without violence. When the temperature rises to the boiling point of the solvent, the solid dry ice absorbs heat and volatilizes, so that the pressure of the whole reaction kettle is rapidly increased under the condition that the temperature is not high, a basis is provided for fully stirring the solvent and the high-density polylactic acid in the reaction kettle at high temperature and high pressure, and then a high polymer solution (spinning solution) in a homogeneous state is obtained; and high-efficiency and low-energy-consumption polylactic acid fiber preparation is realized. By using the biodegradable material PLA and the low-volatility solvent, the use of petroleum-based plastic is reduced, and the whole production process is more environment-friendly and meets the requirements of sustainable development.

The present application relates to the field of non-woven fabric technology, particularly to an anti-static flash spinning composite non-woven fabric and a preparation method thereof. The preparation method includes the following steps, S1: taking anti-static functional masterbatch and a first polymer as spunbond raw materials, obtaining spunbonded fibre with the spunbond raw materials by a spunbond process, and forming a spunbonded fibre web by aggregating the spunbonded fibre; S2: taking a second polymer as a raw material, obtaining a flash spinning fiber web sheet by a flash spinning process; forming a flash spinning fiber layer by laying the flash spinning fiber web sheet on the spunbonded fibre web to obtain a composite fiber web; S3: performing a cold pressing treatment and a hot rolling treatment on the composite fiber web sequentially, causing the spunbonded fibre web to form a spunbond layer and causing the flash spinning fiber layer to form a flash spinning layer, that is, the flash spinning composite non-woven fabric . The flash spinning composite non-woven fabric produced by this method not only has anti-static performance, but also has high waterproof performance, high breathability, and good protective performance.