29 results about "Melt blowing" patented technology

The invention belongs to the technical field of polylactic acid filter materials, and discloses an antibacterial electret polylactic acid composition for melt-blowing, a preparation method of the antibacterial electret polylactic acid composition, polylactic acid granules, application of the polylactic acid granules and polylactic acid melt-blown cloth, the antibacterial electret polylactic acid composition for melt-blowing comprises polylactic acid, a plasticizer, a composite electret and a guanidine salt polymer, optionally a dispersant and optionally an antioxidant; relative to 100 parts by weight of polylactic acid, the content of the plasticizer is 0.5-2 parts by weight, the content of the composite electret is 0.5-3 parts by weight, the content of the guanidine salt polymer is 0.3-3 parts by weight, the content of the dispersing agent is 0-0.3 part by weight, and the content of the antioxidant is 0-0.2 part by weight; the composite electret comprises tourmaline powder, a hindered amine light stabilizer, hydroxy stearate and a dendritic polymer. The composite electret and the guanidine salt polymer are added into the polylactic acid composition, so that the antibacterial polylactic acid melt-blown cloth with excellent antibacterial effect and efficient filtering efficiency is prepared.

The invention relates to a high-breathability and high-fitness in-vitro fixing device with a shape memory function and a preparation method of the high-breathability and high-fitness in-vitro fixing device, and relates to the field of biomedical materials, the high-breathability and high-fitness in-vitro fixing device comprises the following components in parts by mass: 40-45 parts of polycaprolactone, 40-45 parts of polylactic acid, 4-6 parts of a compatilizer, 0.5-1.5 parts of a cross-linking agent, 8-12 parts of nano-hydroxyapatite, 10-20 parts of biocompatible polyurethane and 0.1-0.3 part of a coloring agent. The preparation method comprises the following steps: mixing the raw materials, carrying out melt blending, and carrying out extrusion granulation to obtain composite particles; the composite particles are subjected to melt-blowing spinning, and non-woven cloth is obtained; and carrying out hot press molding on the non-woven fabric, shaping and cooling to obtain the high-breathability and high-fitness in-vitro fixing device with the shape memory function. The in-vitro fixing device prepared by the invention has a silk net structure, has good air permeability, a shape memory function and fitness, and has good mechanical properties and antibacterial properties.

Carbon-based energy storage devices and methods of forming the same are disclosed. A method of producing an energy storage device can include treating pitch to produce a carbon fiber material, fusing a plurality of carbon fibers of the carbon fiber material together to form a carbon monolith, such that the plurality of carbon fibers are fused at contact points by melt blowing, and compressing the carbon monolith to a predetermined density.

The present application relates to the technical field of filter material preparation, in particular to a filter cotton preparation method. The filter cotton preparation method comprises a melt blowing step of melt blowing a melt to prepare an initial filter cotton, and a pleating step of pleating the initial filter cotton; the melt blowing step comprises: a frequency conversion motor connected with a spinneret and controlling the travel speed of the spinneret; the travel speed of the spinneret is inversely proportional to the thickness of the filter cotton; the travel speed of the spinneret is alternated between v1 and v2; the thickness of the filter cotton is alternated between D1 and D2; the pleating step comprises: obtaining a pleat angle in a thick layer; the thick layer is extruded to reduce the thickness, the thin layer is not extruded and the thickness remains unchanged, and a pleated filter cotton with uniform thickness is obtained. The filter cotton preparation method provided by the present application realizes the purpose of uniformizing the wind speed of the filtering air flow by providing a melt blowing method for controlling the thickness of the filter cotton to be alternately thin and thick, and a pleating process for forming a pleat angle in the thick layer of the filter cotton and a non-pleat angle in the thin layer, thereby obtaining a pleated filter cotton with uniform overall thickness.

The utility model provides a kind of melt blowing device of nonwoven fabric, including: workbench, the workbench top is fixedly connected with square cover, the square cover inside is fixedly connected with melt blowing mechanism, the square cover top is fixedly connected with suction pump, the suction pump bottom is fixedly connected with inlet suction pipe, the inlet suction pipe is penetrated in square cover and extends to square cover inside, the utility model provides a kind of melt blowing device of nonwoven fabric, by inlet suction pipe, suction pump, back suction pipe, purification cylinder, heating cylinder, exhaust pump, side air pipe mutually cooperate and use so that suction pump will melt blowing hot air recovery to purification cylinder inside and carry out removal impurity, then transport to heating cylinder inside and further heat, again by side air pipe and be transported to device inside, by recycling hot air, the energy efficiency of whole melt blowing process is improved, this not only meets the requirement of sustainable development, also helps enterprise to maintain competitiveness in the market environment of energy price fluctuation.

A process for producing melt-blown polymer fibers (2) comprising at least the following steps: a) Providing a polymer melt (3); b) Extruding the polymer melt (3) using at least one spinneret arrangement (4) to form polymer fibers (2) into a free jet; c) Stretching the polymer fibers (2) using a primary gas stream (5); d) Cooling the polymer fibers (2) during drawing; and e) Tempering the polymer fibers (2) during drawing by a tertiary gas stream (7) or by thermal radiation (11).

The invention discloses a carbon fiber filter paper manufacturing method. A first heating tank, a first hot roller, a second heating tank, a second hot roller, a first cold roller, melt-blowing equipment and a second cold roller are sequentially arranged in the conveying direction of a conveying belt. The preparation method comprises the following steps: firstly, crushing carbon fiber felt cloth into a mixed material by using a crusher, preheating the mixed material through a heating tank I, flowing out, pre-pressing and forming through a hot roller I, uniformly spraying resin powder in a molten and softened state in a heating tank II onto a carbon fiber carrier, carrying out hot rolling by using a hot roller II, and carrying out rolling curing by using a cold roller I, thereby obtaining the carbon fiber carrier. Spraying a polypropylene PP film by the melt-blowing equipment, and carrying out final-state rolling cooling treatment and rolling at a cold roller II to obtain a finished product of the carbon fiber filter paper; the filter paper can be folded into different layered structures or wound into various shapes flexibly, and can be applied to compact household water purifiers, portable mobile water supply equipment or specific industrial application scenes with limited space.

The invention discloses a manufacturing method of an ultrathin absorption core with high diffusion speed, which comprises the following steps: S1, spinning through a melt-blowing process to form a substrate fiber net, S2, extruding fibers through the melt-blowing process, and spraying SAP particles on the fibers to form a fiber-SAP composite net, and S3, spinning through the melt-blowing process to form a covering fiber net, the crimped fibers of the base fiber net, the fiber-SAP composite net and the covering fiber net are mutually interspersed and wound to form mechanical hooking, and S4, rolling treatment is carried out to form an absorbing core body comprising a covering layer, an absorbing layer and a base layer from top to bottom; s5, the absorbing core body is subjected to a hydrophilic finishing process, the mode that chemical bonding is replaced with a physical structure is adopted, the problems of chemical residues, performance loss and other pain points caused by adhesive fixing are solved, after liquid makes contact with the covering layer manufactured through the melt-blowing process, the liquid can be rapidly diffused outwards through the capillary effect and then infiltrates downwards to the absorbing layer, and therefore the absorbing core body is subjected to hydrophilic finishing. And more SAP in the absorption layer can absorb water at the first time, so that the liquid absorption efficiency is greatly improved.

A Zr-based amorphous composite material with high room temperature plasticity and its preparation method belong to the field of new materials technology. Its nominal atomic percentage chemical composition is Zr. 100‑a‑b Al a Cu b Where 5≤a≤15, 20≤b≤30; the matrix is ​​Zr-based amorphous material with uniformly and dispersedly distributed Cu soft particles, and the size and number density of the Cu soft particles are adjusted by the preparation process; the particle diameter is 100-1000 nm, and when the size is constant, the number density corresponds to the volume fraction of particles in the composite material, which is 2%-10%. First, Zr is prepared... 100‑a‑b Al a Cu b The process involves: first, determining the melting point of the alloy ingot; then, using melt blowing casting technology to control the melt overheating temperature and holding time, thereby regulating the size and distribution density of Cu particle precipitates to obtain a Zr-based amorphous composite material with good microstructure uniformity. This invention significantly improves its room-temperature plastic deformation capability. The composite material combines the high strength advantages of an amorphous matrix, the unique plastic coordination ability brought by in-situ pure Cu particles, and the work hardening characteristics induced by twinning.

The utility model relates to a polypropylene melt-blowing continuous extrusion device which comprises a shell, a melt-blowing device, a melt-blowing device, a melt-blowing device and a melt-blowing device, the driving assembly is installed at the closed end of the shell, an output part of the driving assembly extends into the shell, and the driving assembly is used for driving the spiral conveying assembly to rotate; the end cover assembly is mounted at the opening end of the shell; the limiting assembly is used for axially abutting against and limiting the spiral conveying assembly; and the spiral conveying assembly is coaxially arranged in the shell, is in transmission connection with the output part of the driving assembly, and is driven by the driving assembly to rotate in the shell so as to convey materials from the closed end of the shell to the open end until the materials are extruded through the end cover assembly. Through the meshing structure of the driving assembly and the spiral conveying assembly, namely the staggered meshing of the first tooth key and the second tooth key and the abutting design of the end cover assembly, the spiral conveying assembly can be rapidly mounted and dismounted without the help of bolts, the maintenance time is remarkably shortened, and the labor cost is reduced.

The invention discloses water-soluble modified polyvinyl alcohol as well as a preparation method and application thereof, and belongs to the technical field of non-woven materials. According to the invention, the polyvinyl alcohol, the composite polyol plasticizing system, the melt-blowing processing stabilizing aid and the auxiliary additive are blended and extruded, so that the polyvinyl alcohol is converted from high-crystallization and high-brittleness resin which cannot be directly subjected to melt-blowing processing originally into water-soluble modified polyvinyl alcohol with meltable fluidity, draftability and thermal stability. The melt-blown non-woven fabric is prepared by taking the water-soluble modified polyvinyl alcohol as a raw material, and stable processing of the polyvinyl alcohol under the melt-blown process condition is realized for the first time. The prepared melt-blown non-woven fabric keeps the low-temperature water-soluble characteristic of polyvinyl alcohol, so that the melt-blown non-woven fabric can be widely applied to the scenes of medical protection, industrial isolation or radioactive dust collection and the like.

The application provides a kind of aloe-like leaf polylactic acid ultrafine fiber composite material and its preparation method and application, belong to medical protective material technical field.The aloe-like leaf polylactic acid ultrafine fiber composite material is prepared by using paraffin wax (PW) and polydimethylsiloxane (PDMS) hydrophobic modified polylactic acid (PLA) as raw material, through melt blowing method, using melt blowing in-situ drafting process to obtain directional PLA fiber material, then the directional PLA fiber material is used as upper and lower surface layer, PLA spunbond fiber material is used as intermediate layer, and template net curtain is covered, and the aloe-like leaf structure can give polylactic acid fiber liquid directional rolling characteristics and excellent mechanical properties, to provide new ideas for multifunctional, high-quality medical and health care protective materials.

The utility model discloses a kind of melt blowing device of non-woven fabric, it is related to non-woven fabric production technical field, and it includes melt blowing die head;Rotary drum is rotatably installed below melt blowing die head;Sealing plate is installed in the inside of rotary drum end portion, and supports the rotary drum rotation;Fan is installed on the sealing plate, and air is transported to the inside of rotary drum;Exhaust hole is evenly distributed on the circumference side wall of rotary drum;The utility model introduces external cold air into the inside of rotary drum by the fan of rotary drum end portion, air passes through rotary drum side wall, can be rotary drum cooling, be conducive to the solidification forming of melt blowing fiber.

The present application discloses an ethylene-vinyl alcohol copolymer (EVOH) resin composition, which is prepared by polymerization and alcoholysis reaction, and the content of EVOH with ethylene content less than 15 mol% is less than 3 wt%. The present application also discloses a preparation method of the EVOH resin composition. The EVOH resin composition prepared by the present application has the content of EVOH with ethylene content less than 15 mol% less than 3 wt%, and the processing performance is significantly improved, the yellowing at high temperature is obviously reduced, and the defect number after melt blowing is reduced; thus the multilayer sheet, film and container prepared by the present application do not have crystal point, stripe and other defects.

Activated carbon fibers and methods of stabilizing, carbonizing, and activating carbon fibers are disclosed. The activated carbon fibers can be used in filtration, chemical capture, energy storage, and other applications. A method of producing an activated carbon fiber material for filtration or gas adsorption can include melt blowing pitch to form pitch fibers, stabilizing the pitch fibers to form stabilized pitch fibers, carbonizing the stabilized pitch fibers to form carbon fibers, and activating the carbon fibers to form activated carbon fibers with a specific surface area of at least 1900 m2 / g.

A metallocene polypropylene for melt blown applications having (i) a melting point of equal to or greater than about 155 °C;(ii) a melt flow rate of from about 50 dg / min. to about 4000 dg / min.; and (iii) a xylenes soluble content of from about 0.1 wt.% to about 2.0 wt.%. A method comprising contacting a metallocene catalyzed polypropylene having a xylenes soluble content of from about 0.1 wt.% to about 2.0 wt.% with a prodegradant to form a visbroken polypropylene and melt blowing the mixture to form an article.

This invention proposes a method for preparing polyamide ultrafine fiber two-dimensional membranes using reactive meltblown technology, along with the two-dimensional membranes and their applications. The invention includes the following steps: a mixture of caprolactam monomer and catalyst is fed into a reactive screw extruder. The feed conveying section is at 90-200°C, the reaction section at 200-280°C, and the compression extrusion section at 200-280°C. The process involves extrusion, spinning, stretching, curing, fiber formation, and random web formation to obtain the two-dimensional membrane. This invention continuously completes the mixing, polymerization, and melt extrusion of the raw material formulation, as well as the spinning, stretching, and web formation of the fibers. Polyamide ultrafine fiber two-dimensional membranes are obtained from monomers in a one-step process, effectively reducing the spinning process temperature of the polyamide melt. This enables the continuous and uninterrupted processing of polyamide ultrafine fiber two-dimensional membranes, meeting the requirements of large-scale production with high yield. It has wide applications in industrial filtration, medical dressings, hygiene protection, and precision instrument packaging.

The invention discloses a preparation method for an antimicrobial air filtration material, comprising the following steps: opening and carding low-melting-point fibers and 2D fibers, then conveying the fibers to a lapping machine to form a fiber web; subjecting the fiber web to thermal pressing and shaping to form a filtration base cloth; introducing the filtration base cloth onto a spraying shaft of a melt-blown line; mixing polypropylene particles and a silver ion antimicrobial agent, and putting the mixture into a heating bin for melt blowing, so that the melt-blown polypropylene fibers adhere to an outer surface of the filtration base cloth to form a PP melt-blown layer, resulting in an air filtration cloth; spraying an antimicrobial viscose solution at high pressure on the PP melt-blown layer; and then performing drying and shaping, trimming and rolling to obtain the antimicrobial air filtration material.

The application relates to the technical field of adsorption materials, and particularly discloses a non-woven material for adsorbing low-concentration heavy metal ions and a preparation method thereof. The preparation method comprises the following steps: S1: dispersing intrinsic state polyaniline and organic sulfonic acid in water, sealing and stirring, vacuum filtering and continuously washing with water, vacuum drying the obtained filter cake, and obtaining dark green powder, i.e. doped state polyaniline; S2: uniformly premixing the doped state polyaniline, carbon nanotube loaded nano zero-valent iron composite particles, second polypropylene and polyethylene wax in a mixer, mixing in a banbury mixer, and extruding and granulating to obtain a synergistic adsorbent master batch; and S3: uniformly mixing the synergistic adsorbent master batch and first polypropylene, melt blowing and spinning to obtain the non-woven material for adsorbing low-concentration heavy metal ions. The organic sulfonic acid doped polyaniline and the carbon nanotube loaded nano zero-valent iron composite particles are combined, more adsorption sites can be provided, and the adsorption capacity for heavy metal ions is enhanced.

The application discloses a preparation method of polylactic acid fiber, and belongs to the technical field of textile materials. The polylactic acid fiber has the problems of hard and stiff hand feeling and poor dyeing performance. The polylactic acid resin is used as a base body, mesoporous silicon oxide, a compatilizer and an enzymatic pore-forming agent are mixed, an oxidizing agent is added during double-screw extrusion, and enzymatic treatment is carried out after melt blowing to realize modification. The mesoporous silicon oxide provides adsorption sites for biological enzymes, the oxidizing agent breaks the polylactic acid molecular chain to form notches, and the enzymatic pore-forming agent forms pores after degradation. The components jointly construct the porous network of the prepared polylactic acid fiber, the biodegradability and mechanical properties of the polylactic acid fiber are retained, the soft hand feeling of the polylactic acid fiber is effectively improved, and sufficient channels are provided for dye molecule penetration.

The invention discloses a waste gas recovery treatment device in a polypropylene spun-melt non-woven fabric production process, which comprises a gas inlet unit, a pretreatment unit, a recovery unit, an advanced treatment unit, an adsorption and desorption regeneration unit and an exhaust unit which are communicated in sequence, and further comprises a control box, and each unit is connected with a valve through a pipeline; the gas inlet unit comprises a waste gas collecting cover, an induced draft fan and a gas flow meter, the waste gas collecting cover is installed at a waste gas discharge outlet of the spinning machine and the melt-blowing machine, a heat preservation layer is arranged on the inner wall, the induced draft fan is connected with the gas flow meter in series, and the gas flow meter is electrically connected with the control box. The use effect is good, two-stage pretreatment of cyclone separation and filter bag dust removal is adopted, and the dust removal rate reaches 99% or above; the combined process of condensation recovery and photocatalytic oxidation is optimized according to the characteristics of the polypropylene waste gas, the removal rate of VOCs reaches 95% or above, and it is ensured that the waste gas reaches the standard and is discharged.

The invention relates to the field of spinneret plates, in particular to a multi-row-hole melt-blowing spinneret plate which is formed by sequentially stacking a feeding plate, a distributing plate and a spinneret plate body, and the spinneret plate body is formed by assembling and stacking an upper spinneret plate body, a middle spinneret plate body and a lower spinneret plate body; a melt cavity is formed in the top of the upper spinneret plate, a plurality of spinneret columns are arranged at the bottom of the melt cavity in a communicating mode and penetrate through the middle spinneret plate and the lower spinneret plate, and an upper pressure stabilizing cavity communicated with the air duct is formed in the bottom of the upper spinneret plate. According to the multi-row-hole melt-blowing mechanism composed of the feeding plate, the distribution plate and the spinneret plate, melt-blowing of non-woven fabric can be achieved, airflow can be evenly distributed through the pressure stabilizing flow channel so as to guarantee the uniformity of the airflow sprayed out of the air nozzles around the conical spray head, uniform distribution of melt can be achieved through the distribution plate, and the uniformity of the melt can be guaranteed. The device is simple in structure and good in control over the uniformity of melt and airflow, and the productivity is improved compared with a conventional melt-blowing technology.

The invention discloses a photodynamic heterogeneous composite spiral fiber antibacterial composite film as well as a preparation method and application thereof, the preparation method comprises the following steps: uniformly mixing a dried polymer raw material with titanium dioxide, and carrying out melt extrusion granulation to obtain PPLA / TiO2 master batch; adding the dried PPLA / TiO2 master batch into melt-blowing equipment, and carrying out melt spinning under the condition of 180-190 DEG C to obtain a PPLA-coated TiO2 melt-blown non-woven fabric; and spinning and spraying an inner channel spinning solution, a middle channel spinning solution and an outer channel spinning solution on the PPLA-coated TiO2 melt-blown non-woven fabric by adopting a three-channel coaxial electrostatic spinning technology, and finishing spinning to obtain the photodynamic heterogeneous composite spiral fiber antibacterial composite membrane. The photodynamic heterogeneous composite spiral fiber antibacterial composite film obtained by the invention has excellent radiation cooling regulation capability, good thermal stability and comfort, and the antibacterial rate of 99.86% under a dark condition.

Carbon-based energy storage devices and methods of forming the same are disclosed. A method of producing an energy storage device can include treating pitch to produce a carbon fiber material, fusing a plurality of carbon fibers of the carbon fiber material together to form a carbon monolith, such that the plurality of carbon fibers are fused at contact points by melt blowing, and compressing the carbon monolith to a predetermined density.

Activated carbon fibers and methods of stabilizing, carbonizing, and activating carbon fibers are disclosed. The activated carbon fibers can be used in filtration, chemical capture, energy storage, and other applications. A method of producing an activated carbon fiber material for filtration or gas adsorption can include melt blowing pitch to form pitch fibers, stabilizing the pitch fibers to form stabilized pitch fibers, carbonizing the stabilized pitch fibers to form carbon fibers, and activating the carbon fibers to form activated carbon fibers with a specific surface area of at least 1900 m2 / g.

Systems and processes for producing short carbon fibers from an asphaltene-rich feedstock are disclosed. The asphaltene-rich feedstock are melted, filtered, and / or degassed before spinning into fibers. The molten feed may be spun using melt blowing or centrifugal spinning, to form random mats of discontinuous green fibers. These random mats of discontinuous fibers are suitable for transporting and processing using low-cost, standard bulk solids handling methods. In the methods discussed herein, the green fibers are first exposed within a reactor to a gas containing nitrogen dioxide (NO2) which infuses the fibers, thereby adding nitrogen oxide functional groups to the green fibers. The infused fibers are heated during which the infused fibers undergo oxidation leading to stabilization at low temperatures, allowing low softening point asphaltene-rich feeds to be successfully stabilized. The stabilized fibers are further heated in a substantially oxygen-free environment to carbonize the fibers to produce a random mat, discontinuous carbon fiber product. The produced random fiber material is suitable for blending into polymers or other matrices to produce random short carbon fiber reinforced products.

The application discloses a kind of polyester for melt blowing and its filtering manufacturing method, belong to high polymer material field.The raw material of this high polymer polyester contains aliphatic dibasic acid glycol ester, the intrinsic viscosity of polyester is between 0.45~0.6dL·g ‑1 Between, the melting point of polyester is 190~230 DEG C.A kind of modified PET melt blowing polyester material is obtained by the application, and the melt blowing nonwoven fabric prepared from the material has high mechanical strength and filtering performance, reduces the complex process required for preparing PET / PP filtering material by traditional spunbonded fabric / melt blown fabric / spunbonded fabric (SMS) method, reduces technical difficulty and production cost, and the single substance of filtering material is beneficial to the recycling and recycling of filtering product.

The present application provides methods of secondary oil containment comprising lining a liquid hydrocarbon containment basin with a fibrous textile comprising a styrenic block copolymer (SBC), wherein the fibrous textile comprising SBC is produced by a melt blown process. Also provided are fibrous textiles produced by melt blowing styrenic block copolymers (SBC).

The application discloses a kind of copper double flash smelting plant heat recovery ring network process and system, comprising: (1) the different pressure grades steam generated by melt blowing waste heat boiler, conversion waste heat boiler, dry absorption boiler is input to different gas equipment by pipe network, and the condensate formed by steam heat exchange is entered into condensate tank by pipe network;(2) condensate is divided into two ways by condensate pump, one way is transported to deaerator, and one way enters desalted water tank;(3) the desalted water generated by chemical water treatment station, one way is transported to deaerator for deaeration, and one way is transported to dry absorption boiler;(4) deaerator receives condensate and desalted water, and transports after deaeration;(5) desalted water is transported to dry absorption boiler to generate low-pressure steam;In the application, the steam condensate generated in smelting process is not discharged with steam, so that the condensate directly forms closed loop in pipeline, and the heat energy itself can be better used for production, realizes complete recycling of condensate, and has the advantages of energy saving and emission reduction.