39results about How to "Smooth fiber surface" patented technology

The invention discloses a preparation method of Kangshu (healthy and confortable) composite staple fiber, comprising the steps: esterification reaction of PTA and EG is carried out; polycondensation reaction of the esterification product is carried out to obtain PET; polyethylene is melted into a PE melt by entering a screw extruder; the PET melt and the PE melt respectively enter a composite spinning manifold and are ejected from a composite hollow spinneret to obtain a hollow skin-core structure yarn; part of PE melt is taken out from the main pipe of the spinning manifold into which the PETmelt enters and a zinc-based ultrafine powder antibacterial agent and a dispersing agent potassium tripolyphosphate supported by zeolite are added to the part of the melt, and after uniformly mixing,the mixture returns to the main pipe; in the stretching process, secondary stretching is performed, and primary stretching is controlled in 1.88-2.14 times; the primary stretching adopts steam bath,and the temperature is controlled at 115 DEC C to 125 DECC. The first stage stretching of the invention is steam stretching. Stretching temperature can be improved to soften the PE, and the surface ofthe produced fiber is smooth with good bonding effect.

The invention relates to a method for preparing forsterite porous superfine fibers by electrostatic spinning, belonging to the technical field of material science. The fiber preparation method comprises the following steps: preparing a reaction liquid from anhydrous magnesium chloride, tetraethoxysilane and anhydrous dichloromethane according to a certain mole ratio, then carrying out gelation treatment on the reaction liquid by heating and triggering non-hydrolytic sol-gel reaction to synthesize forsterite gel; mixing absolute ethyl alcohol with a certain amount of polyvinylpyrrolidone (PVP) according to a certain proportion to obtain a PVP ethanol solution and dissolving the synthesized forsterite gel in the PVP ethanol solution to obtain a spinning precursor solution; preparing the spinning precursor solution into a forsterite xerogel/PVP complex fiber by adopting electrostatic spinning and then carrying out high-temperature calcination, thus obtaining the forsterite porous superfine fibers. The preparation method of the forsterite porous superfine fibers is simple to operate and easy to control, is low in preparation cost and can provide novel high-temperature thermal insulation materials for the fields, such as aviation and the military industry.

The invention discloses a preparation method of poly-p-phenylene ethylene derivative micro-nano fiber. The preparation method is characterized by comprising the following steps of: firstly preparing poly-p-phenylene ethylene derivative and tetrahydrofuran, chlorobenzene, methylbenzene, chloroform or dichloroethane into solution according to the concentration of 0.5-20wt%; then preparing the solution and normal hexane, normal heptane or cyclohexane and the like into solution according to the volume ratio of 1:4-20:1; and then carrying out electrostatic spinning. In the poly-p-phenylene ethylene derivative micro-nano fiber prepared by the invention, the diameter is 19nm-2mum, the surface of the fiber is smooth, the length is centimeter-level and the mechanical property is good; by measurement of a fluorescence spectrum, a photoluminescence spectrum of the fiber is consistent to that of a spinning-coating film; and by a simple orientation device, an emission spectrum shows very strong polarization.

The invention relates to a modification method for a leukocyte filtering membrane. The modification method includes the following steps that S1, a hydrophobic resin filtering membrane is put in first modification mixed liquid for first-time impregnation for 0.5-2 h at the temperature of 20-40 DEG C and the pressure of 1-10 MPa, the hydrophobic resin filtering membrane is taken out, washed and then dried for 6-10 h at the temperature of 50-60 DEG C, and a first modified filtering membrane is obtained; S2, the first modified filtering membrane is put in second modification mixed liquid for second-time impregnation for 0.5-2 h at the temperature of 20-40 DEG C, the first modified filtering membrane is taken out, washed and then dried for 6-10 h at the temperature of 50-60 DEG C, and the modified filtering membrane is obtained. The modified filtering membrane obtained through the method has good wettability, stability and compatibility, blood platelets in fresh blood and blood preserved at normal temperature are activated to capture leukocyte, it is achieved that the leukocyte and the blood platelets are filtered out at the same time, and the filtering effect is good.

The invention relates to the technical field of polymer conductive materials, in particular to a conductive network remodeling method based on SBS conductive fibers. The method comprises the following steps: (1) preparing an ethyl acetate mixed solution; and (2) soaking the SBS conductive fibers in the ethyl acetate mixed solution prepared in the step (1) for 5-15 s, taking out the SBS conductive fibers, and drying the SBS conductive fibers. According to the method, the conductive network in the conductive fibers is remodeled, the technical problem that the electrical property of the fibers is poor due to uneven distribution of conductive particles in the conductive fibers is solved, the surface of the fibers is smooth, the electrical property is effectively improved, and the strength of the fibers cannot be reduced. The invention also provides a conductive composite fiber prepared by using the conductive network remodeling method based on the SBS conductive fibers, and a preparation method of the conductive composite fiber. The preparation method is simple to operate, convenient and economical, the fibers cannot be damaged, and the prepared fibers have good spinnability, stretchability, conductivity, high strain range and stability.

The invention provides a nanofiber capable of providing slow controlled release of medicines after pulse. The nanofiber comprises a main fiber bundle, wherein a parallel fiber bundle is arranged at the outer side of the main fiber bundle, the main fiber bundle and the parallel fiber bundle extend in the length direction, in the radial cross section, the parallel fiber bundle covers the periphery of the main fiber bundle by 40-70 %, and the main fiber bundle is composed of a medicine and a polymer pharmaceutic adjuvant insoluble in water; the parallel fiber bundle is composed of a medicine and a pharmaceutical adjuvant easily soluble in water. The invention further provides a preparation method of the nanofiber. The preparation method comprises the following steps: blending the medicine and the polymer pharmaceutical adjuvant insoluble in water into a consolute solution, and blending the medicine and the pharmaceutical adjuvant easily soluble in water into a consolute solution; controlling the rate of being injected into parallel spinning heads of the two solutions by adopting two injection pumps, and under the effect of high-voltage static electricity, by taking the outlets of the parallel spinning heads as a template, collecting the nanofiber by adopting a grounded fiber receiving flat plate; and preparing the nanofiber capable of providing slow controlled release of medicines after pulse.

The invention provides a preparation method of graphene fiber. The preparation method comprises the following steps that SiC fiber is heated in a vacuum environment and/or an inert gas environment, heating is conducted till the silicone element is degraded and effused, heat preservation is conducted, and the graphene fiber is obtained. the method takes SiC fiber as the raw material, and continuousindustrialized preparation of graphene fiber is achieved by adopting the simple technology.

The invention discloses a flame-retardant fiber impregnating composition. The flame-retardant fiber impregnating composition is characterized by being prepared from, by weight, 15-40 parts of liquid rubber, 10-25 parts of isocyanate, 5-15 parts of plasticizers, 5-12 parts of liquid petroleum tackifying resin, 3-6 parts of N-hydroxymethyl-3-(dimethoxyphosphonyl) propionamide and 5-10 parts of flame-retardant resin. According to the flame-retardant fiber impregnating composition, the advantages of resisting high temperature, being flame-retardant and high in bonding strength and the like are achieved, and due to the fact that the viscosity is small and the wettability is good, the good impregnating property on fibers is achieved; processed fiber yarn is smooth in surface and easy to weave and wind, the good bonding property with rubber and the smooth surface are achieved, no solvent is volatilized and energy consumption is low in the whole processing process, and the wide market value and the great market potential are achieved.

The invention discloses thermosetting internal combustion engine filter paper and a preparation method thereof, and belongs to the technical field of papermaking. The thermosetting internal combustion engine filter paper is prepared from high-strength and high-modulus polyethylene fibers, plant fibers, aramid pulp and polyvinyl alcohol fibers through wet papermaking. Wherein the mass ratio of each fiber component is as follows: 30%-100% of the high-strength and high-modulus polyethylene fiber, 0%-50% of the plant fiber, 5%-20% of the aramid pulp and 1%-5% of the polyvinyl alcohol fiber. The preparation process of the thermosetting internal combustion engine filter paper comprises the following steps: (1) determining the ratio of fiber raw materials; (2) pulping plant fibers; (3) pretreating; (4) defibering the raw materials; the thermosetting internal combustion engine filter paper prepared by the preparation method disclosed by the invention has good hydrophobicity, excellent corrosion resistance, uniform pore size and excellent mechanical strength.

The invention discloses an environment-friendly wool and cotton blended fabric descaling treatment process. Under the action of ultrasonic waves, the process includes double treatment of enzyme treatment and calcium carbonate grinding, which effectively improves the uniformity of descaling treatment on the wool surface, reduces the Cellular damage to the inner layer of the fiber improves the wearability and durability of wool blend fabrics. This process does not use heavy metals, halides and other substances harmful to the human body and the environment, and is an environmentally friendly fiber treatment process.